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Message-Id: <1305144843-5058-10-git-send-email-msalter@redhat.com>
Date: Wed, 11 May 2011 16:13:56 -0400
From: Mark Salter <msalter@...hat.com>
To: linux-kernel@...r.kernel.org
Subject: [PATCH 09/16] C6X: add kernel files
Signed-off-by: Mark Salter <msalter@...hat.com>
---
arch/c6x/kernel/Makefile | 13 +
arch/c6x/kernel/asm-offsets.c | 127 ++++++
arch/c6x/kernel/c6x_ksyms.c | 75 ++++
arch/c6x/kernel/clkdev.c | 192 +++++++++
arch/c6x/kernel/early_printk.c | 81 ++++
arch/c6x/kernel/entry.S | 851 ++++++++++++++++++++++++++++++++++++++++
arch/c6x/kernel/head.S | 127 ++++++
arch/c6x/kernel/irq.c | 119 ++++++
arch/c6x/kernel/module.c | 249 ++++++++++++
arch/c6x/kernel/process.c | 349 ++++++++++++++++
arch/c6x/kernel/ptrace.c | 284 +++++++++++++
arch/c6x/kernel/setup.c | 550 ++++++++++++++++++++++++++
arch/c6x/kernel/signal.c | 384 ++++++++++++++++++
arch/c6x/kernel/switch_to.S | 67 ++++
arch/c6x/kernel/sys_c6x.c | 111 ++++++
arch/c6x/kernel/tags.c | 98 +++++
arch/c6x/kernel/tags.h | 82 ++++
arch/c6x/kernel/time.c | 55 +++
arch/c6x/kernel/traps.c | 416 ++++++++++++++++++++
arch/c6x/kernel/vectors.S | 81 ++++
arch/c6x/kernel/vmlinux.lds.S | 205 ++++++++++
21 files changed, 4516 insertions(+), 0 deletions(-)
create mode 100644 arch/c6x/kernel/Makefile
create mode 100644 arch/c6x/kernel/asm-offsets.c
create mode 100644 arch/c6x/kernel/c6x_ksyms.c
create mode 100644 arch/c6x/kernel/clkdev.c
create mode 100644 arch/c6x/kernel/early_printk.c
create mode 100644 arch/c6x/kernel/entry.S
create mode 100644 arch/c6x/kernel/head.S
create mode 100644 arch/c6x/kernel/irq.c
create mode 100644 arch/c6x/kernel/module.c
create mode 100644 arch/c6x/kernel/process.c
create mode 100644 arch/c6x/kernel/ptrace.c
create mode 100644 arch/c6x/kernel/setup.c
create mode 100644 arch/c6x/kernel/signal.c
create mode 100644 arch/c6x/kernel/switch_to.S
create mode 100644 arch/c6x/kernel/sys_c6x.c
create mode 100644 arch/c6x/kernel/tags.c
create mode 100644 arch/c6x/kernel/tags.h
create mode 100644 arch/c6x/kernel/time.c
create mode 100644 arch/c6x/kernel/traps.c
create mode 100644 arch/c6x/kernel/vectors.S
create mode 100644 arch/c6x/kernel/vmlinux.lds.S
diff --git a/arch/c6x/kernel/Makefile b/arch/c6x/kernel/Makefile
new file mode 100644
index 0000000..25cdded
--- /dev/null
+++ b/arch/c6x/kernel/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile for arch/c6x/kernel/
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-y := process.o traps.o irq.o signal.o ptrace.o \
+ setup.o sys_c6x.o time.o \
+ switch_to.o entry.o vectors.o c6x_ksyms.o tags.o
+
+obj-$(CONFIG_MODULES) += module.o
+obj-$(CONFIG_COMMON_CLKDEV) += clkdev.o
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/c6x/kernel/asm-offsets.c b/arch/c6x/kernel/asm-offsets.c
new file mode 100644
index 0000000..52fca25
--- /dev/null
+++ b/arch/c6x/kernel/asm-offsets.c
@@ -0,0 +1,127 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+#include <linux/thread_info.h>
+#include <asm/procinfo.h>
+#include <linux/kbuild.h>
+#include <linux/unistd.h>
+
+void foo(void)
+{
+ OFFSET(REGS_A16, pt_regs, a16);
+ OFFSET(REGS_A17, pt_regs, a17);
+ OFFSET(REGS_A18, pt_regs, a18);
+ OFFSET(REGS_A19, pt_regs, a19);
+ OFFSET(REGS_A20, pt_regs, a20);
+ OFFSET(REGS_A21, pt_regs, a21);
+ OFFSET(REGS_A22, pt_regs, a22);
+ OFFSET(REGS_A23, pt_regs, a23);
+ OFFSET(REGS_A24, pt_regs, a24);
+ OFFSET(REGS_A25, pt_regs, a25);
+ OFFSET(REGS_A26, pt_regs, a26);
+ OFFSET(REGS_A27, pt_regs, a27);
+ OFFSET(REGS_A28, pt_regs, a28);
+ OFFSET(REGS_A29, pt_regs, a29);
+ OFFSET(REGS_A30, pt_regs, a30);
+ OFFSET(REGS_A31, pt_regs, a31);
+
+ OFFSET(REGS_B16, pt_regs, b16);
+ OFFSET(REGS_B17, pt_regs, b17);
+ OFFSET(REGS_B18, pt_regs, b18);
+ OFFSET(REGS_B19, pt_regs, b19);
+ OFFSET(REGS_B20, pt_regs, b20);
+ OFFSET(REGS_B21, pt_regs, b21);
+ OFFSET(REGS_B22, pt_regs, b22);
+ OFFSET(REGS_B23, pt_regs, b23);
+ OFFSET(REGS_B24, pt_regs, b24);
+ OFFSET(REGS_B25, pt_regs, b25);
+ OFFSET(REGS_B26, pt_regs, b26);
+ OFFSET(REGS_B27, pt_regs, b27);
+ OFFSET(REGS_B28, pt_regs, b28);
+ OFFSET(REGS_B29, pt_regs, b29);
+ OFFSET(REGS_B30, pt_regs, b30);
+ OFFSET(REGS_B31, pt_regs, b31);
+
+ OFFSET(REGS_A0, pt_regs, a0);
+ OFFSET(REGS_A1, pt_regs, a1);
+ OFFSET(REGS_A2, pt_regs, a2);
+ OFFSET(REGS_A3, pt_regs, a3);
+ OFFSET(REGS_A4, pt_regs, a4);
+ OFFSET(REGS_A5, pt_regs, a5);
+ OFFSET(REGS_A6, pt_regs, a6);
+ OFFSET(REGS_A7, pt_regs, a7);
+ OFFSET(REGS_A8, pt_regs, a8);
+ OFFSET(REGS_A9, pt_regs, a9);
+ OFFSET(REGS_A10, pt_regs, a10);
+ OFFSET(REGS_A11, pt_regs, a11);
+ OFFSET(REGS_A12, pt_regs, a12);
+ OFFSET(REGS_A13, pt_regs, a13);
+ OFFSET(REGS_A14, pt_regs, a14);
+ OFFSET(REGS_A15, pt_regs, a15);
+
+ OFFSET(REGS_B0, pt_regs, b0);
+ OFFSET(REGS_B1, pt_regs, b1);
+ OFFSET(REGS_B2, pt_regs, b2);
+ OFFSET(REGS_B3, pt_regs, b3);
+ OFFSET(REGS_B4, pt_regs, b4);
+ OFFSET(REGS_B5, pt_regs, b5);
+ OFFSET(REGS_B6, pt_regs, b6);
+ OFFSET(REGS_B7, pt_regs, b7);
+ OFFSET(REGS_B8, pt_regs, b8);
+ OFFSET(REGS_B9, pt_regs, b9);
+ OFFSET(REGS_B10, pt_regs, b10);
+ OFFSET(REGS_B11, pt_regs, b11);
+ OFFSET(REGS_B12, pt_regs, b12);
+ OFFSET(REGS_B13, pt_regs, b13);
+ OFFSET(REGS_DP, pt_regs, dp);
+ OFFSET(REGS_SP, pt_regs, sp);
+
+ OFFSET(REGS_TSR, pt_regs, tsr);
+ OFFSET(REGS_ORIG_A4, pt_regs, orig_a4);
+
+ DEFINE(REGS__END, sizeof(struct pt_regs));
+ BLANK();
+
+ OFFSET(THREAD_PC, thread_struct, pc);
+ OFFSET(THREAD_B15_14, thread_struct, b15_14);
+ OFFSET(THREAD_A15_14, thread_struct, a15_14);
+ OFFSET(THREAD_B13_12, thread_struct, b13_12);
+ OFFSET(THREAD_A13_12, thread_struct, a13_12);
+ OFFSET(THREAD_B11_10, thread_struct, b11_10);
+ OFFSET(THREAD_A11_10, thread_struct, a11_10);
+ OFFSET(THREAD_RICL_ICL, thread_struct, ricl_icl);
+ BLANK();
+
+ OFFSET(TASK_STATE, task_struct, state);
+ BLANK();
+
+ OFFSET(THREAD_INFO_FLAGS, thread_info, flags);
+ OFFSET(THREAD_INFO_PREEMPT_COUNT, thread_info, preempt_count);
+ BLANK();
+
+ /* These would be unneccessary if we ran asm files
+ * through the preprocessor.
+ */
+ DEFINE(KTHREAD_SIZE, THREAD_SIZE);
+ DEFINE(KTHREAD_SHIFT, THREAD_SHIFT);
+ DEFINE(KTHREAD_START_SP, THREAD_START_SP);
+ DEFINE(ENOSYS_, ENOSYS);
+ DEFINE(NR_SYSCALLS_, __NR_syscalls);
+
+ DEFINE(_TIF_SYSCALL_TRACE, (1<<TIF_SYSCALL_TRACE));
+ DEFINE(_TIF_NOTIFY_RESUME, (1<<TIF_NOTIFY_RESUME));
+ DEFINE(_TIF_SIGPENDING, (1<<TIF_SIGPENDING));
+ DEFINE(_TIF_NEED_RESCHED, (1<<TIF_NEED_RESCHED));
+ DEFINE(_TIF_POLLING_NRFLAG, (1<<TIF_POLLING_NRFLAG));
+
+ DEFINE(_TIF_ALLWORK_MASK, TIF_ALLWORK_MASK);
+ DEFINE(_TIF_WORK_MASK, TIF_WORK_MASK);
+}
+
diff --git a/arch/c6x/kernel/c6x_ksyms.c b/arch/c6x/kernel/c6x_ksyms.c
new file mode 100644
index 0000000..8ee8a93
--- /dev/null
+++ b/arch/c6x/kernel/c6x_ksyms.c
@@ -0,0 +1,75 @@
+/*
+ * linux/arch/c6x/kernel/c6x_ksyms.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <asm/checksum.h>
+#include <linux/io.h>
+
+/*
+ * libgcc functions - used internally by the compiler...
+ */
+extern int __c6xabi_divi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divi);
+
+extern unsigned __c6xabi_divu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divu);
+
+extern int __c6xabi_remi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_remi);
+
+extern unsigned __c6xabi_remu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_remu);
+
+extern int __c6xabi_divremi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divremi);
+
+extern unsigned __c6xabi_divremu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divremu);
+
+extern unsigned long long __c6xabi_mpyll(unsigned long long src1,
+ unsigned long long src2);
+EXPORT_SYMBOL(__c6xabi_mpyll);
+
+extern unsigned long long __c6xabi_divull(unsigned long long n,
+ unsigned long long d);
+EXPORT_SYMBOL(__c6xabi_divull);
+
+extern long long __c6xabi_negll(long long src);
+EXPORT_SYMBOL(__c6xabi_negll);
+
+extern unsigned long long __c6xabi_llshl(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshl);
+
+extern long long __c6xabi_llshr(long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshr);
+
+extern unsigned long long __c6xabi_llshru(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshru);
+
+extern void __c6xabi_strasgi(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi);
+
+extern void __c6xabi_push_rts(void);
+EXPORT_SYMBOL(__c6xabi_push_rts);
+
+extern void __c6xabi_pop_rts(void);
+EXPORT_SYMBOL(__c6xabi_pop_rts);
+
+extern void __c6xabi_strasgi_64plus(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi_64plus);
+
+/* lib functions */
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(ip_fast_csum);
+
diff --git a/arch/c6x/kernel/clkdev.c b/arch/c6x/kernel/clkdev.c
new file mode 100644
index 0000000..747c316
--- /dev/null
+++ b/arch/c6x/kernel/clkdev.c
@@ -0,0 +1,192 @@
+/*
+ * arch/c6x/kernel/clkdev.c
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@...hat.com>
+ *
+ * Original code from: arch/arm/common/clkdev.c
+ *
+ * Copyright (C) 2008 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Helper for the clk API to assist looking up a struct clk.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/clk.h>
+
+#include <asm/clkdev.h>
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+
+
+int __weak __clk_get(struct clk *clk)
+{
+ return 1;
+}
+
+void __weak __clk_put(struct clk *clk)
+{
+}
+
+/*
+ * Find the correct struct clk for the device and connection ID.
+ * We do slightly fuzzy matching here:
+ * An entry with a NULL ID is assumed to be a wildcard.
+ * If an entry has a device ID, it must match
+ * If an entry has a connection ID, it must match
+ * Then we take the most specific entry - with the following
+ * order of precedence: dev+con > dev only > con only.
+ */
+static struct clk *clk_find(const char *dev_id, const char *con_id)
+{
+ struct clk_lookup *p;
+ struct clk *clk = NULL;
+ int match, best = 0;
+
+ list_for_each_entry(p, &clocks, node) {
+ match = 0;
+ if (p->dev_id) {
+ if (!dev_id || strcmp(p->dev_id, dev_id))
+ continue;
+ match += 2;
+ }
+ if (p->con_id) {
+ if (!con_id || strcmp(p->con_id, con_id))
+ continue;
+ match += 1;
+ }
+ if (match == 0)
+ continue;
+
+ if (match > best) {
+ clk = p->clk;
+ best = match;
+ }
+ }
+ return clk;
+}
+
+struct clk *clk_get_sys(const char *dev_id, const char *con_id)
+{
+ struct clk *clk;
+
+ mutex_lock(&clocks_mutex);
+ clk = clk_find(dev_id, con_id);
+ if (clk && !__clk_get(clk))
+ clk = NULL;
+ mutex_unlock(&clocks_mutex);
+
+ return clk ? clk : ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get_sys);
+
+struct clk *clk_get(struct device *dev, const char *con_id)
+{
+ const char *dev_id = dev ? dev_name(dev) : NULL;
+
+ return clk_get_sys(dev_id, con_id);
+}
+EXPORT_SYMBOL(clk_get);
+
+void clk_put(struct clk *clk)
+{
+ __clk_put(clk);
+}
+EXPORT_SYMBOL(clk_put);
+
+void clkdev_add(struct clk_lookup *cl)
+{
+ mutex_lock(&clocks_mutex);
+ list_add_tail(&cl->node, &clocks);
+ mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL(clkdev_add);
+
+void __init clkdev_add_table(struct clk_lookup *cl, size_t num)
+{
+ mutex_lock(&clocks_mutex);
+ while (num--) {
+ list_add_tail(&cl->node, &clocks);
+ cl++;
+ }
+ mutex_unlock(&clocks_mutex);
+}
+
+#define MAX_DEV_ID 20
+#define MAX_CON_ID 16
+
+struct clk_lookup_alloc {
+ struct clk_lookup cl;
+ char dev_id[MAX_DEV_ID];
+ char con_id[MAX_CON_ID];
+};
+
+struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id,
+ const char *dev_fmt, ...)
+{
+ struct clk_lookup_alloc *cla;
+
+ cla = kzalloc(sizeof(*cla), GFP_KERNEL);
+ if (!cla)
+ return NULL;
+
+ cla->cl.clk = clk;
+ if (con_id) {
+ strlcpy(cla->con_id, con_id, sizeof(cla->con_id));
+ cla->cl.con_id = cla->con_id;
+ }
+
+ if (dev_fmt) {
+ va_list ap;
+
+ va_start(ap, dev_fmt);
+ vscnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap);
+ cla->cl.dev_id = cla->dev_id;
+ va_end(ap);
+ }
+
+ return &cla->cl;
+}
+EXPORT_SYMBOL(clkdev_alloc);
+
+int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
+ struct device *dev)
+{
+ struct clk *r = clk_get(dev, id);
+ struct clk_lookup *l;
+
+ if (IS_ERR(r))
+ return PTR_ERR(r);
+
+ l = clkdev_alloc(r, alias, alias_dev_name);
+ clk_put(r);
+ if (!l)
+ return -ENODEV;
+ clkdev_add(l);
+ return 0;
+}
+EXPORT_SYMBOL(clk_add_alias);
+
+/*
+ * clkdev_drop - remove a clock dynamically allocated
+ */
+void clkdev_drop(struct clk_lookup *cl)
+{
+ mutex_lock(&clocks_mutex);
+ list_del(&cl->node);
+ mutex_unlock(&clocks_mutex);
+ kfree(cl);
+}
+EXPORT_SYMBOL(clkdev_drop);
diff --git a/arch/c6x/kernel/early_printk.c b/arch/c6x/kernel/early_printk.c
new file mode 100644
index 0000000..06a72fd
--- /dev/null
+++ b/arch/c6x/kernel/early_printk.c
@@ -0,0 +1,81 @@
+/*
+ * linux/arch/c6x/kernel/early_printk.c
+ *
+ * Copyright (C) 2011 Texas Instruments Incoporated
+ * Author: Mark Salter <msalter@...hat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/setup.h>
+
+
+static void (*early_write)(const char *s, unsigned n);
+
+static int __initdata keep_early;
+
+static void early_console_write(struct console *con, const char *s, unsigned n)
+{
+ early_write(s, n);
+}
+
+static struct console early_console = {
+ .write = early_console_write,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+void early_printk(const char *fmt, ...)
+{
+ char buf[512];
+ int n;
+ va_list ap;
+
+ va_start(ap, fmt);
+ n = vscnprintf(buf, sizeof(buf), fmt, ap);
+ early_write(buf, n);
+ va_end(ap);
+}
+
+static int __init setup_early_printk(char *str)
+{
+ if (!str)
+ return 0;
+
+ if (early_write != NULL)
+ return 0;
+
+#ifdef CONFIG_HVC_C6X
+ if (!strncmp(str, "hvc", 3)) {
+ str += 3;
+ early_write = hvc_c6x_early_puts;
+ strcpy(early_console.name, "early_hvc");
+ }
+#endif
+
+ if (strncmp(str, ",keep", 5) == 0)
+ keep_early = 1;
+
+ if (likely(early_write)) {
+
+ if (keep_early)
+ early_console.flags &= ~CON_BOOT;
+ else
+ early_console.flags |= CON_BOOT;
+
+ register_console(&early_console);
+ printk(KERN_INFO "early printk enabled on %s%d\n",
+ early_console.name,
+ early_console.index);
+ }
+
+ return 0;
+}
+early_param("earlyprintk", setup_early_printk);
+
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
new file mode 100644
index 0000000..e35dd2d
--- /dev/null
+++ b/arch/c6x/kernel/entry.S
@@ -0,0 +1,851 @@
+;
+; linux/arch/c6x/kernel/entry.s
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004, 2005, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@...tuallogix.com)
+; Updated for 2.6.34: Mark Salter <msalter@...hat.com>
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+
+ .altmacro
+#define _DEFINE_MACRO(name,args...) .macro name args
+
+#include <linux/sys.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+#include <asm/unistd.h>
+#include <asm/errno.h>
+
+; Registers naming
+#define DP B14
+#define SP B15
+
+#ifndef CONFIG_PREEMPT
+#define resume_kernel restore_all
+#endif
+
+ ;; Entry management functions
+ .global ret_from_exception
+ .global ret_from_interrupt
+
+ ;; Interrupt handlers
+ .global _int4_handler
+ .global _int5_handler
+ .global _int6_handler
+ .global _int7_handler
+ .global _int8_handler
+ .global _int9_handler
+ .global _int10_handler
+ .global _int11_handler
+ .global _int12_handler
+ .global _int13_handler
+ .global _int14_handler
+ .global _int15_handler
+ .global _bad_interrupt
+ .global _nmi_handler
+
+ ;;
+ ;; This defines the normal kernel pt_regs layout.
+ ;;
+_DEFINE_MACRO(SAVE_ALL,__rp,__tsr)
+ STW .D2T2 B0,*SP--[2] ; save original B0
+ MVKL .S2 current_ksp,B0
+ MVKH .S2 current_ksp,B0
+ LDW .D2T2 *B0,B1 ; KSP
+
+ NOP 3
+ STW .D2T2 B1,*+SP[1] ; save original B1
+ XOR .D2 SP,B1,B0 ; (SP ^ KSP)
+ LDW .D2T2 *+SP[1],B1 ; restore B0/B1
+ LDW .D2T2 *++SP[2],B0
+ SHR .S2 B0,THREAD_SHIFT,B0 ; 0 if already using kernel stack
+
+ [B0] STDW .D2T2 SP:DP,*--B1[1] ; user: save user sp/dp on kernel stack
+ [B0] MV .S2 B1,SP ; and switch to kernel stack
+||[!B0] STDW .D2T2 SP:DP,*--SP[1] ; kernel: save on current stack
+
+ SUBAW .D2 SP,2,SP
+
+ ADD .D1X SP,-8,A15
+ || STDW .D2T1 A15:A14,*SP--[16] ; save A15:A14
+
+ STDW .D2T2 B13:B12,*SP--[1]
+ || STDW .D1T1 A13:A12,*A15--[1]
+ || MVC .S2 __rp,B13
+
+ STDW .D2T2 B11:B10,*SP--[1]
+ || STDW .D1T1 A11:A10,*A15--[1]
+ || MVC .S2 CSR,B12
+
+ STDW .D2T2 B9:B8,*SP--[1]
+ || STDW .D1T1 A9:A8,*A15--[1]
+ || MVC .S2 RILC,B11
+ STDW .D2T2 B7:B6,*SP--[1]
+ || STDW .D1T1 A7:A6,*A15--[1]
+ || MVC .S2 ILC,B10
+
+ STDW .D2T2 B5:B4,*SP--[1]
+ || STDW .D1T1 A5:A4,*A15--[1]
+
+ STDW .D2T2 B3:B2,*SP--[1]
+ || STDW .D1T1 A3:A2,*A15--[1]
+ || MVC .S2 __tsr,B5
+
+ STDW .D2T2 B1:B0,*SP--[1]
+ || STDW .D1T1 A1:A0,*A15--[1]
+ || MV .S1X B5,A5
+
+ STDW .D2T2 B31:B30,*SP--[1]
+ || STDW .D1T1 A31:A30,*A15--[1]
+ STDW .D2T2 B29:B28,*SP--[1]
+ || STDW .D1T1 A29:A28,*A15--[1]
+ STDW .D2T2 B27:B26,*SP--[1]
+ || STDW .D1T1 A27:A26,*A15--[1]
+ STDW .D2T2 B25:B24,*SP--[1]
+ || STDW .D1T1 A25:A24,*A15--[1]
+ STDW .D2T2 B23:B22,*SP--[1]
+ || STDW .D1T1 A23:A22,*A15--[1]
+ STDW .D2T2 B21:B20,*SP--[1]
+ || STDW .D1T1 A21:A20,*A15--[1]
+ STDW .D2T2 B19:B18,*SP--[1]
+ || STDW .D1T1 A19:A18,*A15--[1]
+ STDW .D2T2 B17:B16,*SP--[1]
+ || STDW .D1T1 A17:A16,*A15--[1]
+
+ STDW .D2T2 B13:B12,*SP--[1] ; save PC and CSR
+
+ STDW .D2T2 B11:B10,*SP--[1] ; save RILC and ILC
+ STDW .D2T1 A5:A4,*SP--[1] ; save TSR and orig A4
+
+ ;; We left an unused word on the stack just above pt_regs.
+ ;; It is used to save whether or not this frame is due to
+ ;; a syscall. It is cleared here, but the syscall handler
+ ;; sets it to a non-zero value.
+ MVK .L2 0,B1
+ STW .D2T2 B1,*+SP(REGS__END+8) ; clear syscall flag
+ .endm
+
+_DEFINE_MACRO(SAVE_ALL_EXCEPT)
+ SAVE_ALL NRP,NTSR
+ .endm
+
+_DEFINE_MACRO(SAVE_ALL_INT)
+ SAVE_ALL IRP,ITSR
+ .endm
+
+_DEFINE_MACRO(RESTORE_ALL,__rp,__tsr)
+
+ LDDW .D2T2 *++SP[1],B9:B8 ; get TSR (B9)
+ LDDW .D2T2 *++SP[1],B11:B10 ; get RILC (B11) and ILC (B10)
+ LDDW .D2T2 *++SP[1],B13:B12 ; get PC (B13) and CSR (B12)
+
+ ADDAW .D1X SP,30,A15
+
+ LDDW .D1T1 *++A15[1],A17:A16
+ || LDDW .D2T2 *++SP[1],B17:B16
+ LDDW .D1T1 *++A15[1],A19:A18
+ || LDDW .D2T2 *++SP[1],B19:B18
+ LDDW .D1T1 *++A15[1],A21:A20
+ || LDDW .D2T2 *++SP[1],B21:B20
+ LDDW .D1T1 *++A15[1],A23:A22
+ || LDDW .D2T2 *++SP[1],B23:B22
+ LDDW .D1T1 *++A15[1],A25:A24
+ || LDDW .D2T2 *++SP[1],B25:B24
+ LDDW .D1T1 *++A15[1],A27:A26
+ || LDDW .D2T2 *++SP[1],B27:B26
+ LDDW .D1T1 *++A15[1],A29:A28
+ || LDDW .D2T2 *++SP[1],B29:B28
+ LDDW .D1T1 *++A15[1],A31:A30
+ || LDDW .D2T2 *++SP[1],B31:B30
+
+ LDDW .D1T1 *++A15[1],A1:A0
+ || LDDW .D2T2 *++SP[1],B1:B0
+
+ LDDW .D1T1 *++A15[1],A3:A2
+ || LDDW .D2T2 *++SP[1],B3:B2
+ || MVC .S2 B9,__tsr
+ LDDW .D1T1 *++A15[1],A5:A4
+ || LDDW .D2T2 *++SP[1],B5:B4
+ || MVC .S2 B11,RILC
+ LDDW .D1T1 *++A15[1],A7:A6
+ || LDDW .D2T2 *++SP[1],B7:B6
+ || MVC .S2 B10,ILC
+
+ LDDW .D1T1 *++A15[1],A9:A8
+ || LDDW .D2T2 *++SP[1],B9:B8
+ || MVC .S2 B13,__rp
+
+ LDDW .D1T1 *++A15[1],A11:A10
+ || LDDW .D2T2 *++SP[1],B11:B10
+ || MVC .S2 B12,CSR
+
+ LDDW .D1T1 *++A15[1],A13:A12
+ || LDDW .D2T2 *++SP[1],B13:B12
+
+ MV .D2X A15,SP
+ || MVKL .S1 current_ksp,A15
+ MVKH .S1 current_ksp,A15
+ || ADDAW .D1X SP,6,A14
+ STW .D1T1 A14,*A15 ; save kernel stack pointer
+
+ LDDW .D2T1 *++SP[1],A15:A14
+
+ B .S2 __rp ; return from interruption
+ LDDW .D2T2 *+SP[1],SP:DP
+ NOP 4
+ .endm
+
+_DEFINE_MACRO(RESTORE_ALL_EXCEPT)
+ RESTORE_ALL NRP,NTSR
+ .endm
+
+_DEFINE_MACRO(RESTORE_ALL_INT)
+ RESTORE_ALL IRP,ITSR
+ .endm
+
+_DEFINE_MACRO(MASK_SYSCALL)
+ .endm
+
+_DEFINE_MACRO(UNMASK_SYSCALL)
+ .endm
+
+_DEFINE_MACRO(MASK_INT,reg)
+ MVC .S2 CSR,reg
+ CLR .S2 reg,0,0,reg
+ MVC .S2 reg,CSR
+ .endm
+
+ ;; Enable interrupts
+_DEFINE_MACRO(UNMASK_INT,reg)
+ MVC .S2 CSR,reg
+ SET .S2 reg,0,0,reg
+ MVC .S2 reg,CSR
+ .endm
+
+ ;;
+ ;; Call c6x_do_IRQ with the corresponding int number and regs
+ ;;
+_DEFINE_MACRO(CALL_INT,int)
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 c6x_do_IRQ,A0
+ MVKH .S1 c6x_do_IRQ,A0
+ BNOP .S2X A0,1
+ MVK .S1 int,A4
+ ADDAW .D2 SP,2,B4
+ MVKL .S2 ret_from_interrupt,B3
+ MVKH .S2 ret_from_interrupt,B3
+#else
+ CALLP .S2 c6x_do_IRQ,B3
+ || MVK .S1 int,A4
+ || ADDAW .D2 SP,2,B4
+ B .S1 ret_from_interrupt
+ NOP 5
+#endif
+ .endm
+
+_DEFINE_MACRO(GET_THREAD_INFO,reg)
+ SHR .S1X SP,THREAD_SHIFT,reg
+ SHL .S1 reg,THREAD_SHIFT,reg
+ .endm
+
+ .sect ".data"
+
+ .global current_ksp
+current_ksp:
+ .word init_thread_union + THREAD_START_SP
+
+ .sect ".text"
+
+ ;;
+ ;; Jump to schedule() then return to ret_from_exception
+ ;;
+_reschedule:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 schedule,A0
+ MVKH .S1 schedule,A0
+ B .S2X A0
+#else
+ B .S1 schedule
+#endif
+ ADDKPC .S2 ret_from_exception,B3,4
+
+ ;;
+ ;; Called before syscall handler when process is being debugged
+ ;;
+tracesys_on:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 syscall_trace_entry,A0
+ MVKH .S1 syscall_trace_entry,A0
+ B .S2X A0
+#else
+ B .S1 syscall_trace_entry
+#endif
+ ADDKPC .S2 ret_from_syscall_trace,B3,3
+ ADD .S1X 8,SP,A4
+
+ret_from_syscall_trace:
+ ;; tracing returns (possibly new) syscall number
+ MV .D2X A4,B0
+ || MVK .S2 __NR_syscalls,B1
+ CMPLTU .L2 B0,B1,B1
+
+ [!B1] BNOP .S2 ret_from_syscall_function,5
+ || MVK .S1 -ENOSYS,A4
+
+ ;; reload syscall args from (possibly modified) stack frame
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+ LDW .D2T1 *+SP(REGS_A6+8),A6
+ LDW .D2T2 *+SP(REGS_B6+8),B6
+ LDW .D2T1 *+SP(REGS_A8+8),A8
+ LDW .D2T2 *+SP(REGS_B8+8),B8
+
+ ;; Get syscall handler addr from sys_call_table:
+ MVKL .S2 sys_call_table,B1
+ MVKH .S2 sys_call_table,B1
+ LDW .D2T2 *+B1[B0],B0 ; B0 = sys_call_table[__NR_*]
+ MVKL .S2 ret_from_syscall_function,B3
+ MVKH .S2 ret_from_syscall_function,B3
+ NOP 2
+ BNOP .S2 B0,5 ; branch to syscall handler
+ || LDW .D2T1 *+SP(REGS_ORIG_A4+8),A4
+
+syscall_exit_work:
+ AND .D1 _TIF_SYSCALL_TRACE,A2,A0
+ [!A0] BNOP .S1 work_pending,5
+ [A0] B .S2 syscall_trace_exit
+ ADDKPC .S2 resume_userspace,B3,1
+ MVC .S2 CSR,B1
+ SET .S2 B1,0,0,B1
+ MVC .S2 B1,CSR ; enable ints
+
+work_pending:
+ AND .D1 _TIF_NEED_RESCHED,A2,A0
+ [!A0] BNOP .S1 work_notifysig,5
+
+work_resched:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 schedule,A1
+ MVKH .S1 schedule,A1
+ B .S2X A1
+#else
+ B .S2 schedule
+#endif
+ ADDKPC .S2 work_rescheduled,B3,4
+work_rescheduled:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_WORK_MASK,A1
+ MVK .S1 _TIF_NEED_RESCHED,A3
+ NOP 2
+ AND .D1 A1,A2,A0
+ || AND .S1 A3,A2,A1
+ [!A0] BNOP .S1 restore_all,5
+ [A1] BNOP .S1 work_resched,5
+
+work_notifysig:
+ B .S2 do_notify_resume
+ LDW .D2T1 *+SP(REGS__END+8),A6 ; syscall flag
+ ADDKPC .S2 resume_userspace,B3,1
+ ADD .S1X 8,SP,A4 ; pt_regs pointer is first arg
+ MV .D2X A2,B4 ; thread_info flags is second arg
+
+ret_from_exception:
+#ifdef CONFIG_PREEMPT
+ MASK_INT B2
+#endif
+ ;;
+ ;; On C64x+, the return way from exception and interrupt
+ ;; is a little bit different
+ ;;
+ret_from_interrupt:
+ ;;
+ ;; Check if we are comming from user mode.
+ ;;
+ LDW .D2T2 *+SP(REGS_TSR+8),B0
+ MVK .S2 0x40,B1
+ NOP 3
+ AND .D2 B0,B1,B0
+ [!B0] BNOP .S2 resume_kernel,5
+
+resume_userspace:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_WORK_MASK,A1
+ MVK .S1 _TIF_NEED_RESCHED,A3
+ NOP 2
+ AND .D1 A1,A2,A0
+ [A0] BNOP .S1 work_pending,5
+ BNOP .S1 restore_all,5
+
+ ;;
+ ;; System call handling
+ ;; B0 = syscall number (in sys_call_table)
+ ;; A4,B4,A6,B6,A8,B8 = arguments of the syscall function
+ ;; A4 is the return value register
+ ;;
+system_call_saved:
+ MVK .L2 1,B2
+ STW .D2T2 B2,*+SP(REGS__END+8) ; set syscall flag
+ MVC .S2 B2,ECR ; acknowledge the software exception
+
+ UNMASK_INT B2 ; re-enable global IT
+
+system_call_saved_noack:
+ ;; Check system call number
+ MVK .S2 __NR_syscalls,B1
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 sys_ni_syscall,A0
+#endif
+ CMPLTU .L2 B0,B1,B1
+#ifdef CONFIG_BIG_KERNEL
+ || MVKH .S1 sys_ni_syscall,A0
+#endif
+
+ ;; Check for ptrace
+ GET_THREAD_INFO A12
+
+#ifdef CONFIG_BIG_KERNEL
+ [!B1] B .S2X A0
+#else
+ [!B1] B .S2 sys_ni_syscall
+#endif
+ [!B1] ADDKPC .S2 ret_from_syscall_function,B3,4
+
+ ;; Get syscall handler addr from sys_call_table:
+ MVKL .S2 sys_call_table,B1
+ MVKH .S2 sys_call_table,B1
+ LDW .D2T2 *+B1[B0],B0 ; B0 = _sys_call_table[__NR_*]
+ || LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ NOP 4
+ AND .D1 _TIF_SYSCALL_TRACE,A2,A2 ; check for TIF_SYSCALL_TRACE flag
+ [A2] BNOP .S1 tracesys_on,5 ; call syscall_trace_entry before syscall function
+
+ ;; Branch to the corresponding syscall
+ B .S2 B0
+ ADDKPC .S2 ret_from_syscall_function,B3,4
+
+ret_from_syscall_function:
+ STW .D2T1 A4,*+SP(REGS_A4+8) ; save return value in A4
+ ; original A4 is in orig_A4
+syscall_exit:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_ALLWORK_MASK,A1
+ NOP 3
+ AND .D1 A1,A2,A2 ; check for work to do
+ [A2] BNOP .S1 syscall_exit_work,5
+
+restore_all:
+ RESTORE_ALL_EXCEPT
+
+ ;;
+ ;; After a fork we jump here directly from resume,
+ ;; so that A4 contains the previous task structure.
+ ;;
+ .global ret_from_fork
+ret_from_fork:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 schedule_tail,A0
+ MVKH .S1 schedule_tail,A0
+ B .S2X A0
+#else
+ B .S2 schedule_tail
+#endif
+ ADDKPC .S2 ret_from_fork_2,B3,4
+ret_from_fork_2:
+ ;; return 0 in A4 for child process
+ GET_THREAD_INFO A12
+ BNOP .S2 syscall_exit,3
+ MVK .L2 0,B0
+ STW .D2T2 B0,*+SP(REGS_A4+8)
+
+ ;;
+ ;; These are the interrupt handlers, responsible for calling __do_IRQ()
+ ;; int6 is used for syscalls (see _system_call entry)
+ ;;
+_int4_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 4
+
+_int5_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 5
+
+_int6_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 6
+
+_int7_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 7
+
+_int8_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 8
+
+_int9_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 9
+
+_int10_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 10
+
+_int11_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 11
+
+_int12_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 12
+
+_int13_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 13
+
+_int14_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 14
+
+_int15_handler:
+ SAVE_ALL_INT
+ MASK_SYSCALL
+ CALL_INT 15
+
+ ;;
+ ;; Handler for uninitialized and spurious interrupts
+ ;;
+ .global _bad_interrupt
+_bad_interrupt:
+ B .S2 IRP
+ NOP 5
+
+ ;;
+ ;; Handler for NMI (C6x) and exceptions (C64x+)
+ ;;
+ .global _nmi_handler
+_nmi_handler:
+ SAVE_ALL_EXCEPT
+
+ MVC .S2 EFR,B2
+ CMPEQ .L2 1,B2,B2
+ || MVC .S2 TSR,B1
+ CLR .S2 B1,10,10,B1
+ MVC .S2 B1,TSR
+#ifdef CONFIG_BIG_KERNEL
+ [!B2] MVKL .S1 process_exception,A0
+ [!B2] MVKH .S1 process_exception,A0
+ [!B2] B .S2X A0
+#else
+ [!B2] B .S2 process_exception
+#endif
+ [B2] B .S2 system_call_saved
+ [!B2] ADDAW .D2 SP,2,B1
+ [!B2] MV .D1X B1,A4
+ ADDKPC .S2 ret_from_trap,B3,2
+
+ret_from_trap:
+ MV .D2X A4,B0
+ [!B0] BNOP .S2 ret_from_exception,5
+
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S2 system_call_saved_noack,B3
+ MVKH .S2 system_call_saved_noack,B3
+#endif
+
+ LDW .D2T2 *+SP(REGS_B0+8),B0
+ LDW .D2T1 *+SP(REGS_A4+8),A4
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+ LDW .D2T1 *+SP(REGS_A6+8),A6
+ LDW .D2T2 *+SP(REGS_B6+8),B6
+ LDW .D2T1 *+SP(REGS_A8+8),A8
+#ifdef CONFIG_BIG_KERNEL
+ || B .S2 B3
+#else
+ || B .S2 system_call_saved_noack
+#endif
+ LDW .D2T2 *+SP(REGS_B8+8),B8
+ NOP 4
+
+ ;;
+ ;; Jump to schedule() then return to ret_from_isr
+ ;;
+#ifdef CONFIG_PREEMPT
+irq_reschedule:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 schedule,A0
+ MVKH .S1 schedule,A0
+ B .S2X A0
+#else
+ B .S2 schedule
+#endif
+ ADDKPC .S2 ret_from_interrupt,B3,4
+
+resume_kernel:
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_PREEMPT_COUNT),A1
+ NOP 4
+ [A1] BNOP .S2 restore_all,5
+
+preempt_schedule:
+ GET_THREAD_INFO A2
+ LDW .D1T1 *+A2(THREAD_INFO_FLAGS),A1
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S2 preempt_schedule_irq,B0
+ MVKH .S2 preempt_schedule_irq,B0
+ NOP 2
+#else
+ NOP 4
+#endif
+ AND .D1 _TIF_NEED_RESCHED,A1,A1 ; check for TIF_NEED_RESCHED flag
+ [!A1] BNOP .S2 restore_all,5
+#ifdef CONFIG_BIG_KERNEL
+ B .S2 B0
+#else
+ B .S2 preempt_schedule_irq
+#endif
+ ADDKPC .S2 preempt_schedule,B3,4
+#endif
+
+ .global enable_exception
+enable_exception:
+ DINT
+ MVC .S2 TSR,B0
+ MVC .S2 B3,NRP
+ MVK .L2 0xc,B1
+ OR .D2 B0,B1,B0
+ MVC .S2 B0,TSR ; Set GEE and XEN in TSR
+ B .S2 NRP
+ NOP 5
+
+ .global sys_sigaltstack
+sys_sigaltstack:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 do_sigaltstack,A0 ; branch to do_sigaltstack
+ MVKH .S1 do_sigaltstack,A0
+ B .S2X A0
+#else
+ B .S2 do_sigaltstack
+#endif
+ LDW .D2T1 *+SP(REGS_SP+8),A6
+ NOP 4
+
+ ;; kernel_execve
+ .global kernel_execve
+kernel_execve:
+ MVK .S2 __NR_execve,B0
+ SWE
+ BNOP .S2 B3,5
+
+ ;;
+ ;; Special system calls
+ ;; return address is in B3
+ ;;
+ .global sys_clone
+sys_clone:
+ ADD .D1X SP,8,A4
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 c6x_clone,A0
+ MVKH .S1 c6x_clone,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 c6x_clone
+ NOP 5
+#endif
+
+ .global sys_vfork
+sys_vfork:
+ ADD .D1X SP,8,A4
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 c6x_vfork,A0 ; branch to _c6x_vfork(struct pt_regs *regs)
+ MVKH .S1 c6x_vfork,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 c6x_vfork
+ NOP 5
+#endif
+
+ .global sys_rt_sigreturn
+sys_rt_sigreturn:
+ ADD .D1X SP,8,A4
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 do_rt_sigreturn,A0 ; branch to _do_rt_sigreturn
+ MVKH .S1 do_rt_sigreturn,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 do_rt_sigreturn
+ NOP 5
+#endif
+
+ .global sys_execve
+sys_execve:
+ ADDAW .D2 SP,2,B6 ; put regs addr in 4th parameter
+ ; & adjust regs stack addr
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+
+ ;; c6x_execve(char *name, char **argv, char **envp, struct pt_regs *regs)
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 c6x_execve,A0
+ MVKH .S1 c6x_execve,A0
+ B .S2X A0
+#else
+ || B .S2 c6x_execve
+#endif
+ STW .D2T2 B3,*SP--[2]
+ ADDKPC .S2 ret_from_c6x_execve,B3,3
+
+ret_from_c6x_execve:
+ LDW .D2T2 *++SP[2],B3
+ NOP 4
+ BNOP .S2 B3,5
+
+ .global sys_pread_c6x
+sys_pread_c6x:
+ MV .D2X A8,B7
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 sys_pread64,A0
+ MVKH .S1 sys_pread64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_pread64
+ NOP 5
+#endif
+
+ .global sys_pwrite_c6x
+sys_pwrite_c6x:
+ MV .D2X A8,B7
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 sys_pwrite64,A0
+ MVKH .S1 sys_pwrite64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_pwrite64
+ NOP 5
+#endif
+
+ .global sys_truncate64_c6x
+sys_truncate64_c6x:
+ MV .D2X A6,B5
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 sys_truncate64,A0
+ MVKH .S1 sys_truncate64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_truncate64
+ NOP 5
+#endif
+
+ .global sys_ftruncate64_c6x
+sys_ftruncate64_c6x:
+ MV .D2X A6,B5
+#ifdef CONFIG_BIG_KERNEL
+ || MVKL .S1 sys_ftruncate64,A0
+ MVKH .S1 sys_ftruncate64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_ftruncate64
+ NOP 5
+#endif
+
+#ifdef __ARCH_WANT_SYSCALL_OFF_T
+;; On Entry
+;; A4 - fd
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+;; B6 - len
+;; A8 - advice
+ .global sys_fadvise64_c6x
+sys_fadvise64_c6x:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 sys_fadvise64,A0
+ MVKH .S1 sys_fadvise64,A0
+ BNOP .S2X A0,2
+#else
+ B .S2 sys_fadvise64
+ NOP 2
+#endif
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .L2 B4,B5
+ || MV .D2X A6,B4
+#else
+ MV .D2X A6,B5
+#endif
+ MV .D1X B6,A6
+ MV .D2X A8,B6
+#endif
+
+;; On Entry
+;; A4 - fd
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+;; B6 - len_lo (LE), len_hi (BE)
+;; A8 - len_lo (BE), len_hi (LE)
+;; B8 - advice
+ .global sys_fadvise64_64_c6x
+sys_fadvise64_64_c6x:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 sys_fadvise64_64,A0
+ MVKH .S1 sys_fadvise64_64,A0
+ BNOP .S2X A0,2
+#else
+ B .S2 sys_fadvise64_64
+ NOP 2
+#endif
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .L2 B4,B5
+ || MV .D2X A6,B4
+ MV .L1 A8,A6
+ || MV .D1X B6,A7
+#else
+ MV .D2X A6,B5
+ MV .L1 A8,A7
+ || MV .D1X B6,A6
+#endif
+ MV .L2 B8,B6
+
+;; On Entry
+;; A4 - fd
+;; B4 - mode
+;; A6 - offset_hi
+;; B6 - offset_lo
+;; A8 - len_hi
+;; B8 - len_lo
+ .global sys_fallocate_c6x
+sys_fallocate_c6x:
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 sys_fallocate,A0
+ MVKH .S1 sys_fallocate,A0
+ BNOP .S2X A0,1
+#else
+ B .S2 sys_fallocate
+ NOP
+#endif
+ MV .D1 A6,A7
+ MV .D1X B6,A6
+ MV .D2X A8,B7
+ MV .D2 B8,B6
diff --git a/arch/c6x/kernel/head.S b/arch/c6x/kernel/head.S
new file mode 100644
index 0000000..af1934c
--- /dev/null
+++ b/arch/c6x/kernel/head.S
@@ -0,0 +1,127 @@
+;
+; linux/arch/c6x/kernel/head.s
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+
+#include "tags.h"
+
+ .global _c_int00
+_c_int00:
+ ;; Save tag magic and pointer
+ MV .S1 A4,A10
+ MV .S2 B4,B10
+
+#ifdef CONFIG_XIP_KERNEL
+ ;; Setup a temporary stack to use when calling C code to
+ ;; relocate XIP data.
+ MVKL .S2 _end,B15
+ MVKH .S2 _end,B15
+ ADDAW .D2 B15,4096,B15
+ AND .D2 ~7,B15,B15
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S2 c6x_relocate_xip_data,B0
+ MVKH .S2 c6x_relocate_xip_data,B0
+ B .S2 B0
+ ADDKPC .S2 _ret_from_reloc,B3,4
+_ret_from_reloc:
+#else
+ CALLP .S2 c6x_relocate_xip_data,B3
+#endif
+#else
+ ;; Set the stack pointer
+ MVKL .S2 current_ksp,B0
+ MVKH .S2 current_ksp,B0
+ LDW .D2T2 *B0,B15
+ NOP 4
+ AND .D2 ~7,B15,B15
+#endif
+
+#ifdef CONFIG_MTD_UCLINUX
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S2 c6x_mtd_early_init,B0
+ MVKH .S2 c6x_mtd_early_init,B0
+ B .S2 B0
+ ADDKPC .S2 _ret_from_mtd_early_init,B3,4
+_ret_from_mtd_early_init:
+#else
+ CALLP .S2 c6x_mtd_early_init,B3
+#endif
+#endif
+
+ ;; Set global page pointer in B14
+ MVKL .S2 __bss_start,B14
+ MVKH .S2 __bss_start,B14
+
+ ;; Clear bss area
+ MVKL .S1 __bss_start,A4
+ MVKH .S1 __bss_start,A4
+ MVKL .S1 __bss_stop,A6
+ MVKH .S1 __bss_stop,A6
+
+ CMPLTU .L1 A4,A6,A1
+ [!A1] B .S1 __bss_done
+ ZERO .L2 B4
+ SUB .L1 A6,A4,A5
+ SHR .S1 A5,2,A3
+ NOP 2
+
+ SUB .L2X A3,1,B0
+ || MV .L1X B4,A3
+
+__bss_loop:
+ STW .D1T1 A3,*A4++
+|| [B0] BNOP .S1 __bss_loop,5
+|| [B0] SUB .L2 B0,1,B0
+
+__bss_done:
+
+ ;; Clear GIE and PGIE
+ MVC .S2 CSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,CSR
+ MVC .S2 TSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,TSR
+ MVC .S2 ITSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,ITSR
+ MVC .S2 NTSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,NTSR
+
+#ifdef CONFIG_XIP_KERNEL
+ ;; Set the stack pointer
+ MVKL .S2 current_ksp,B0
+ MVKH .S2 current_ksp,B0
+ LDW .D2T2 *B0,B15
+ NOP 4
+ AND .D2 ~7,B15,B15
+#endif
+
+ MVKL .S2 TAGS_MAGIC,B0
+ MVKH .S2 TAGS_MAGIC,B0
+ CMPEQ .L1 A10,A0,A0
+ MVKL .S2 c6x_tags_pointer,B1
+ MVKH .S2 c6x_tags_pointer,B1
+ [!A0] MVK .S2 0,B10
+ STW .D2T2 B10,*B1
+
+ ;; Jump to Linux init
+#ifdef CONFIG_BIG_KERNEL
+ MVKL .S1 start_kernel,A0
+ MVKH .S1 start_kernel,A0
+ B .S2X A0
+#else
+ B .S2 start_kernel
+#endif
+ NOP 5
+L1: BNOP .S2 L1,5
+
diff --git a/arch/c6x/kernel/irq.c b/arch/c6x/kernel/irq.c
new file mode 100644
index 0000000..323d119
--- /dev/null
+++ b/arch/c6x/kernel/irq.c
@@ -0,0 +1,119 @@
+/*
+ * linux/arch/c6x/kernel/irq.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * C6x general interrupt handling code.
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/hardirq.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/io.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/hardirq.h>
+#include <asm/hardware.h>
+
+DECLARE_PER_CPU(struct kernel_stat, kstat);
+
+unsigned long irq_err_count;
+
+#ifndef hw_to_kernel_irq
+#define hw_to_kernel_irq(hw) (hw)
+#endif
+
+static void mask_core_irq(struct irq_data *data)
+{
+ BUG_ON(data->irq >= NR_SYS_IRQS);
+ and_creg(IER, ~(1 << data->irq));
+}
+
+static void unmask_core_irq(struct irq_data *data)
+{
+ BUG_ON(data->irq >= NR_SYS_IRQS);
+ or_creg(IER, 1 << data->irq);
+}
+
+static struct irq_chip core_irq_chip = {
+ .name = "C64x+",
+ .irq_mask = mask_core_irq,
+ .irq_unmask = unmask_core_irq,
+};
+
+void ack_bad_irq(int irq)
+{
+ printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
+ irq_err_count++;
+}
+
+asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ irq_enter();
+
+ BUG_ON(prio >= NR_SYS_IRQS);
+
+ generic_handle_irq(hw_to_kernel_irq(prio));
+
+ irq_exit();
+
+ set_irq_regs(old_regs);
+}
+
+void __init init_IRQ(void)
+{
+ int i;
+
+ /* Mask all general IRQs */
+ and_creg(IER, ~0xfff0);
+
+ for (i = 0; i < NR_SYS_IRQS; i++)
+ irq_set_chip_and_handler(i, &core_irq_chip, handle_level_irq);
+
+#ifdef CONFIG_PIC_C64XPLUS
+ init_pic_c64xplus();
+#endif
+
+ /* Clear all general IRQ flags */
+ set_creg(ICR, 0xfff0);
+}
+
+/* This is only necessary to squelch some warning about
+ * IRQs being enabled early. radix_tree_init() leaves
+ * interrupts enabled during early boot when they should
+ * be disabled. None of the individual bits in IER are
+ * enabled so we don't actually get interrupts, just the
+ * warning from init/main.c boot code.
+ */
+int __init __weak arch_early_irq_init(void)
+{
+ /* clear interrupt flags */
+ set_creg(ICR, 0xfff0);
+ local_irq_disable();
+ return 0;
+}
+
+int arch_show_interrupts(struct seq_file *p, int prec)
+{
+ seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
+ return 0;
+}
+
diff --git a/arch/c6x/kernel/module.c b/arch/c6x/kernel/module.c
new file mode 100644
index 0000000..8356f99
--- /dev/null
+++ b/arch/c6x/kernel/module.c
@@ -0,0 +1,249 @@
+/*
+ * linux/arch/c6x/kernel/module.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2005, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Thomas Charleux (thomas.charleux@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file handles the architecture-dependent parts of process handling.
+ */
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <asm/byteorder.h>
+
+#if 0
+#define DEBUGP(fmt...) printk(KERN_INFO fmt)
+#else
+#define DEBUGP(fmt...)
+#endif
+
+void *module_alloc(unsigned long size)
+{
+ if (size == 0)
+ return NULL;
+ return vmalloc_exec(size);
+}
+
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+ vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
+}
+
+/*
+ * finish loading the module
+ */
+int module_finalize(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ return 0;
+}
+
+/*
+ * finish clearing the module
+ */
+void module_arch_cleanup(struct module *mod)
+{
+ module_bug_cleanup(mod);
+}
+
+
+/* We don't need anything special. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ char *secstrings,
+ struct module *mod)
+{
+ return 0;
+}
+
+static inline int fixup_pcr(u32 *ip, Elf32_Addr dest, u32 maskbits, int shift)
+{
+ u32 opcode;
+ long ep = (long)ip & ~31;
+ long delta = ((long)dest - ep) >> 2;
+ long mask = (1 << maskbits) - 1;
+
+ if ((delta >> (maskbits - 1)) == 0 ||
+ (delta >> (maskbits - 1)) == -1) {
+ opcode = *ip;
+ opcode &= ~(mask << shift);
+ opcode |= ((delta & mask) << shift);
+ *ip = opcode;
+
+ DEBUGP("REL PCR_S%d[%p] dest[0p] opcode[%08x]\n",
+ maskbits, ip, (void *)dest, opcode);
+
+ return 0;
+ }
+ printk(KERN_ERR "PCR_S%d reloc %p -> %p out of range!\n",
+ maskbits, ip, (void *)dest);
+
+ return -1;
+}
+
+/*
+ * apply a REL relocation
+ */
+int apply_relocate(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr;
+ Elf_Sym *sym;
+ u32 *location;
+ unsigned int i;
+ Elf32_Addr v;
+ Elf_Addr offset = 0;
+
+ DEBUGP("Applying relocate section %u to %u with offset[0x%x]\n", relsec,
+ sechdrs[relsec].sh_info, offset);
+
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset - offset;
+
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rel[i].r_info);
+
+ /* this is the adjustment to be made */
+ v = sym->st_value;
+
+ switch (ELF32_R_TYPE(rel[i].r_info)) {
+ case R_C6000_ABS32:
+ DEBUGP("REL ABS32: [%p] = 0x%x\n", location, v);
+ *location = v;
+ break;
+ case R_C6000_ABS16:
+ DEBUGP("REL ABS16: [%p] = 0x%x\n", location, v);
+ *(u16 *)location = v;
+ break;
+ case R_C6000_ABS8:
+ DEBUGP("REL ABS8: [%p] = 0x%x\n", location, v);
+ *(u8 *)location = v;
+ break;
+ case R_C6000_PCR_S21:
+ if (fixup_pcr(location, v, 21, 7))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S12:
+ if (fixup_pcr(location, v, 12, 16))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S10:
+ if (fixup_pcr(location, v, 10, 13))
+ return -ENOEXEC;
+ break;
+ default:
+ printk(KERN_ERR "module %s: Unknown REL relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * apply a RELA relocation
+ */
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
+ Elf_Sym *sym;
+ u32 *location, opcode;
+ unsigned int i;
+ Elf32_Addr v;
+ Elf_Addr offset = 0;
+
+ DEBUGP("Applying relocate section %u to %u with offset 0x%x\n", relsec,
+ sechdrs[relsec].sh_info, offset);
+
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset - offset;
+
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rel[i].r_info);
+
+ /* this is the adjustment to be made */
+ v = sym->st_value + rel[i].r_addend;
+
+ switch (ELF32_R_TYPE(rel[i].r_info)) {
+ case R_C6000_ABS32:
+ DEBUGP("RELA ABS32: [%p] = 0x%x\n", location, v);
+ *location = v;
+ break;
+ case R_C6000_ABS16:
+ DEBUGP("RELA ABS16: [%p] = 0x%x\n", location, v);
+ *(u16 *)location = v;
+ break;
+ case R_C6000_ABS8:
+ DEBUGP("RELA ABS8: [%p] = 0x%x\n", location, v);
+ *(u8 *)location = v;
+ break;
+ case R_C6000_ABS_L16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v & 0xffff) << 7);
+ DEBUGP("RELA ABS_L16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_ABS_H16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v >> 9) & 0x7fff80);
+ DEBUGP("RELA ABS_H16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_PCR_S21:
+ if (fixup_pcr(location, v, 21, 7))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S12:
+ if (fixup_pcr(location, v, 12, 16))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S10:
+ if (fixup_pcr(location, v, 10, 13))
+ return -ENOEXEC;
+ break;
+ default:
+ printk(KERN_ERR "module %s: Unknown RELA relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
+
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
new file mode 100644
index 0000000..3aea8b8
--- /dev/null
+++ b/arch/c6x/kernel/process.c
@@ -0,0 +1,349 @@
+/*
+ * linux/arch/c6x/kernel/process.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file handles the architecture-dependent parts of process handling.
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/tick.h>
+#include <linux/sched.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/setup.h>
+#include <asm/pgtable.h>
+#include <asm/pm.h>
+#include <asm/string.h>
+#include <asm/syscalls.h>
+
+#include <mach/board.h> /* for c6x_arch_idle_led() */
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is THREAD_SIZE aligned due to the
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry..
+ */
+union thread_union init_thread_union __init_task_data = {
+ INIT_THREAD_INFO(init_task)
+};
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
+
+extern asmlinkage void ret_from_fork(void);
+
+/*
+ * power off function, if any
+ */
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+/*
+ * power management idle function, if any..
+ */
+void (*pm_idle)(void);
+EXPORT_SYMBOL(pm_idle);
+
+static void default_idle(void)
+{
+#if defined(CONFIG_PM)
+ pwrd_set(PWRD_PD1A);
+#endif
+#ifndef CONFIG_ARCH_SIM
+ do_idle(); /* do nothing until interrupt */
+#endif
+}
+
+/*
+ * The idle loop for C64x
+ */
+void cpu_idle(void)
+{
+ /* endless idle loop with no priority at all */
+ while (1) {
+#ifdef CONFIG_TICK_ONESHOT
+ tick_nohz_stop_sched_tick(1);
+#endif
+ while (!need_resched()) {
+ void (*idle)(void);
+
+ smp_rmb();
+ idle = pm_idle;
+ if (!idle)
+ idle = default_idle;
+ idle();
+ }
+#ifdef CONFIG_TICK_ONESHOT
+ tick_nohz_restart_sched_tick();
+#endif
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+ }
+}
+
+void machine_restart(char *__unused)
+{
+ while (1)
+ ;
+}
+
+void machine_halt(void)
+{
+ while (1)
+ ;
+}
+
+void machine_power_off(void)
+{
+ while (1)
+ ;
+}
+
+void show_regs(struct pt_regs *regs)
+{
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "PC: %08lx SP: %08lx\n",
+ regs->pc, regs->sp);
+ printk(KERN_INFO "Status: %08lx ORIG_A4: %08lx\n",
+ regs->csr, regs->orig_a4);
+ printk(KERN_INFO "A0: %08lx B0: %08lx\n",
+ regs->a0, regs->b0);
+ printk(KERN_INFO "A1: %08lx B1: %08lx\n",
+ regs->a1, regs->b1);
+ printk(KERN_INFO "A2: %08lx B2: %08lx\n",
+ regs->a2, regs->b2);
+ printk(KERN_INFO "A3: %08lx B3: %08lx\n",
+ regs->a3, regs->b3);
+ printk(KERN_INFO "A4: %08lx B4: %08lx\n",
+ regs->a4, regs->b4);
+ printk(KERN_INFO "A5: %08lx B5: %08lx\n",
+ regs->a5, regs->b5);
+ printk(KERN_INFO "A6: %08lx B6: %08lx\n",
+ regs->a6, regs->b6);
+ printk(KERN_INFO "A7: %08lx B7: %08lx\n",
+ regs->a7, regs->b7);
+ printk(KERN_INFO "A8: %08lx B8: %08lx\n",
+ regs->a8, regs->b8);
+ printk(KERN_INFO "A9: %08lx B9: %08lx\n",
+ regs->a9, regs->b9);
+ printk(KERN_INFO "A10: %08lx B10: %08lx\n",
+ regs->a10, regs->b10);
+ printk(KERN_INFO "A11: %08lx B11: %08lx\n",
+ regs->a11, regs->b11);
+ printk(KERN_INFO "A12: %08lx B12: %08lx\n",
+ regs->a12, regs->b12);
+ printk(KERN_INFO "A13: %08lx B13: %08lx\n",
+ regs->a13, regs->b13);
+ printk(KERN_INFO "A14: %08lx B14: %08lx\n",
+ regs->a14, regs->dp);
+ printk(KERN_INFO "A15: %08lx B15: %08lx\n",
+ regs->a15, regs->sp);
+ printk(KERN_INFO "A16: %08lx B16: %08lx\n",
+ regs->a16, regs->b16);
+ printk(KERN_INFO "A17: %08lx B17: %08lx\n",
+ regs->a17, regs->b17);
+ printk(KERN_INFO "A18: %08lx B18: %08lx\n",
+ regs->a18, regs->b18);
+ printk(KERN_INFO "A19: %08lx B19: %08lx\n",
+ regs->a19, regs->b19);
+ printk(KERN_INFO "A20: %08lx B20: %08lx\n",
+ regs->a20, regs->b20);
+ printk(KERN_INFO "A21: %08lx B21: %08lx\n",
+ regs->a21, regs->b21);
+ printk(KERN_INFO "A22: %08lx B22: %08lx\n",
+ regs->a22, regs->b22);
+ printk(KERN_INFO "A23: %08lx B23: %08lx\n",
+ regs->a23, regs->b23);
+ printk(KERN_INFO "A24: %08lx B24: %08lx\n",
+ regs->a24, regs->b24);
+ printk(KERN_INFO "A25: %08lx B25: %08lx\n",
+ regs->a25, regs->b25);
+ printk(KERN_INFO "A26: %08lx B26: %08lx\n",
+ regs->a26, regs->b26);
+ printk(KERN_INFO "A27: %08lx B27: %08lx\n",
+ regs->a27, regs->b27);
+ printk(KERN_INFO "A28: %08lx B28: %08lx\n",
+ regs->a28, regs->b28);
+ printk(KERN_INFO "A29: %08lx B29: %08lx\n",
+ regs->a29, regs->b29);
+ printk(KERN_INFO "A30: %08lx B30: %08lx\n",
+ regs->a30, regs->b30);
+ printk(KERN_INFO "A31: %08lx B31: %08lx\n",
+ regs->a31, regs->b31);
+}
+
+
+static void kernel_thread_helper(int dummy, void *arg, int (*fn)(void *))
+{
+ do_exit(fn(arg));
+}
+
+/*
+ * Create a kernel thread
+ */
+int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+ struct pt_regs regs;
+
+ /*
+ * copy_thread sets a4 to zero (child return from fork)
+ * so we can't just set things up to directly return to
+ * fn.
+ */
+ memset(®s, 0, sizeof(regs));
+ regs.b4 = (unsigned long) arg;
+ regs.a6 = (unsigned long) fn;
+ regs.pc = (unsigned long) kernel_thread_helper;
+ local_save_flags(regs.csr);
+ regs.csr |= 1;
+ regs.tsr = 5; /* Set GEE and GIE in TSR */
+
+ /* Ok, create the new process.. */
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, -1, ®s, 0, NULL, NULL);
+}
+EXPORT_SYMBOL(kernel_thread);
+
+void flush_thread(void)
+{
+}
+
+void exit_thread(void)
+{
+}
+
+/*
+ * vfork syscall is deprecated but uClibc tests for _NR_vfork as a check
+ * for __libc_vfork() existence. So we provide the syscall even though
+ * __libc_vfork() actually uses the clone syscall.
+ */
+asmlinkage int c6x_vfork(struct pt_regs *regs)
+{
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0, NULL, NULL);
+}
+
+asmlinkage int c6x_clone(struct pt_regs *regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+
+ /* syscall puts clone_flags in A4 and usp in B4 */
+ clone_flags = regs->orig_a4;
+ if (regs->b4)
+ newsp = regs->b4;
+ else
+ newsp = regs->sp;
+
+ return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6, (int __user *)regs->b6);
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp)
+{
+ /*
+ * The binfmt loader will setup a "full" stack, but the C6X
+ * operates an "empty" stack. So we adjust the usp so that
+ * argc doesn't get destroyed if an interrupt is taken before
+ * it is read from the stack.
+ *
+ * NB: Library startup code needs to match this.
+ */
+ usp -= 8;
+
+ set_fs(USER_DS);
+ regs->pc = pc;
+ regs->sp = usp;
+ regs->tsr |= 0x40; /* set user mode */
+ current->thread.usp = usp;
+}
+
+/*
+ * Copy a new thread context in its stack.
+ */
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+ unsigned long ustk_size,
+ struct task_struct *p, struct pt_regs *regs)
+{
+ struct pt_regs *childregs;
+
+ childregs = task_pt_regs(p);
+
+ *childregs = *regs;
+ childregs->a4 = 0;
+
+ if (usp == -1)
+ /* case of __kernel_thread: we return to supervisor space */
+ childregs->sp = (unsigned long)(childregs + 1);
+ else
+ /* Otherwise use the given stack */
+ childregs->sp = usp;
+
+ /* Set usp/ksp */
+ p->thread.usp = childregs->sp;
+ /* switch_to uses stack to save/restore 14 callee-saved regs */
+ thread_saved_ksp(p) = (unsigned long)childregs - 8;
+ p->thread.pc = (unsigned int) ret_from_fork;
+ p->thread.wchan = (unsigned long) ret_from_fork;
+ return 0;
+}
+
+/*
+ * c6x_execve() executes a new program.
+ */
+asmlinkage long c6x_execve(const char __user *name,
+ const char __user *const __user *argv,
+ const char __user *const __user *envp,
+ struct pt_regs *regs)
+{
+ int error;
+ char *filename;
+
+ filename = getname(name);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+
+ error = do_execve(filename, argv, envp, regs);
+ putname(filename);
+out:
+ return error;
+}
+
+unsigned long get_wchan(struct task_struct *p)
+{
+ return p->thread.wchan;
+}
diff --git a/arch/c6x/kernel/ptrace.c b/arch/c6x/kernel/ptrace.c
new file mode 100644
index 0000000..fd38463
--- /dev/null
+++ b/arch/c6x/kernel/ptrace.c
@@ -0,0 +1,284 @@
+/*
+ * linux/arch/c6x/kernel/ptrace.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@...hat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/timer.h>
+#include <linux/security.h>
+#include <linux/tracehook.h>
+#include <linux/uaccess.h>
+
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/system.h>
+#include <asm/atomic.h>
+#include <asm/cacheflush.h>
+
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+/* Find the stack offset for a register */
+#define PT_REG(reg) ((int)&((struct pt_regs *)0)->reg)
+#define PT_REG_SIZE (sizeof(struct pt_regs))
+
+#ifdef _BIG_ENDIAN
+#define PT_REGPAIR(odd, even) PT_REG(odd), PT_REG(even)
+#else
+#define PT_REGPAIR(odd, even) PT_REG(even), PT_REG(odd)
+#endif
+
+/* Mapping from PT_xxx to the stack offset at which the register is
+ saved. Notice that usp has no stack-slot and needs to be treated
+ specially (see get_reg/put_reg below). */
+
+static int regoff[] = {
+ PT_REGPAIR(tsr, orig_a4),
+ PT_REGPAIR(rilc, ilc),
+ PT_REGPAIR(pc, csr),
+
+ PT_REGPAIR(b17, b16),
+ PT_REGPAIR(b19, b18),
+ PT_REGPAIR(b21, b20),
+ PT_REGPAIR(b23, b22),
+ PT_REGPAIR(b25, b24),
+ PT_REGPAIR(b27, b26),
+ PT_REGPAIR(b29, b28),
+ PT_REGPAIR(b31, b30),
+
+ PT_REGPAIR(b1, b0),
+ PT_REGPAIR(b3, b2),
+ PT_REGPAIR(b5, b4),
+ PT_REGPAIR(b7, b6),
+ PT_REGPAIR(b9, b8),
+ PT_REGPAIR(b11, b10),
+ PT_REGPAIR(b13, b12),
+
+ PT_REGPAIR(a17, a16),
+ PT_REGPAIR(a19, a18),
+ PT_REGPAIR(a21, a20),
+ PT_REGPAIR(a23, a22),
+ PT_REGPAIR(a25, a24),
+ PT_REGPAIR(a27, a26),
+ PT_REGPAIR(a29, a28),
+ PT_REGPAIR(a31, a30),
+
+ PT_REGPAIR(a1, a0),
+ PT_REGPAIR(a3, a2),
+ PT_REGPAIR(a5, a4),
+ PT_REGPAIR(a7, a6),
+ PT_REGPAIR(a9, a8),
+ PT_REGPAIR(a11, a10),
+ PT_REGPAIR(a13, a12),
+
+ PT_REGPAIR(a15, a14),
+ PT_REGPAIR(sp, dp),
+};
+
+/*
+ * Get a register number from live pt_regs for the specified task.
+ */
+static inline long get_reg(struct task_struct *task, int regno)
+{
+ unsigned long *addr;
+ struct pt_regs *regs = task_pt_regs(task);
+
+ if (regno < sizeof(regoff)/sizeof(regoff[0]))
+ addr = (unsigned long *) ((unsigned long) regs + regoff[regno]);
+ else
+ return 0;
+ return *addr;
+}
+
+/*
+ * Write contents of register REGNO in task TASK.
+ */
+static inline int put_reg(struct task_struct *task,
+ int regno,
+ unsigned long data)
+{
+ unsigned long *addr;
+ struct pt_regs *regs = task_pt_regs(task);
+
+ if (regno < sizeof(regoff)/sizeof(regoff[0]))
+ addr = (unsigned long *)((unsigned long) regs + regoff[regno]);
+ else
+ return -1;
+ *addr = data;
+ return 0;
+}
+
+static inline int read_long(struct task_struct *tsk,
+ unsigned long addr,
+ unsigned long *result)
+{
+ *result = *(unsigned long *)addr;
+ return 0;
+}
+
+static inline int write_long(struct task_struct *tsk,
+ unsigned long addr,
+ unsigned long data)
+{
+ *(unsigned long *) addr = data;
+ return 0;
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching.
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ /* nothing to do */
+}
+
+/*
+ * Read the word at offset "off" into the user area. We
+ * actually access the pt_regs stored on the kernel stack.
+ */
+static int ptrace_read_user(struct task_struct *tsk, unsigned long off,
+ unsigned long __user *ret)
+{
+ unsigned long tmp;
+ unsigned long index = off/sizeof(unsigned long);
+
+ if (off & 3)
+ return -EIO;
+
+
+ tmp = 0;
+ if (off < PT_REG_SIZE)
+ tmp = get_reg(tsk, index);
+ else
+ return -EIO;
+
+ return put_user(tmp, ret);
+}
+
+/*
+ * Perform ptrace request
+ */
+long arch_ptrace(struct task_struct *child, long request,
+ unsigned long addr, unsigned long data)
+{
+ struct pt_regs *regs, newregs;
+ unsigned long tmp;
+ int ret = 0;
+
+ switch (request) {
+ /*
+ * read word at location "addr" in the child process.
+ */
+ case PTRACE_PEEKTEXT:
+ case PTRACE_PEEKDATA:
+ ret = read_long(child, addr, &tmp);
+ if (!ret)
+ ret = put_user(tmp, (unsigned long __user *) data);
+ break;
+
+ /*
+ * read the word at location "addr" in the user registers.
+ */
+ case PTRACE_PEEKUSR:
+ ret = ptrace_read_user(child, addr, (unsigned long __user *) data);
+ break;
+
+ /*
+ * write the word at location addr.
+ */
+ case PTRACE_POKETEXT:
+ ret = write_long(child, addr, data);
+ flush_icache_range(addr, addr + 4);
+ break;
+
+ case PTRACE_POKEDATA:
+ ret = write_long(child, addr, data);
+ break;
+
+ /*
+ * write the word at location addr in the user registers.
+ */
+ case PTRACE_POKEUSR:
+ ret = -EIO;
+ if (addr & 3 || addr < 0)
+ break;
+
+ if (addr < PT_REG_SIZE)
+ ret = put_reg(child, (int)addr >> 2, data);
+ break;
+
+ /*
+ * get all gp regs from the child.
+ */
+ case PTRACE_GETREGS:
+ regs = task_pt_regs(child);
+ if (copy_to_user((void __user *)data, regs,
+ sizeof(struct pt_regs)))
+ ret = -EFAULT;
+ break;
+
+ /*
+ * set all gp regs in the child.
+ */
+ case PTRACE_SETREGS:
+ ret = -EFAULT;
+ if (copy_from_user(&newregs, (void __user *)data,
+ sizeof(struct pt_regs)) == 0) {
+ regs = task_pt_regs(child);
+ *regs = newregs;
+ ret = 0;
+ }
+ break;
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * handle tracing of system call entry
+ * - return the revised system call number or ULONG_MAX to cause ENOSYS
+ */
+asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs)
+{
+ if (tracehook_report_syscall_entry(regs))
+ /* tracing decided this syscall should not happen, so
+ * We'll return a bogus call number to get an ENOSYS
+ * error, but leave the original number in
+ * regs->orig_a4
+ */
+ return ULONG_MAX;
+
+ return regs->b0;
+}
+
+/*
+ * handle tracing of system call exit
+ */
+asmlinkage void syscall_trace_exit(struct pt_regs *regs)
+{
+ tracehook_report_syscall_exit(regs, 0);
+}
diff --git a/arch/c6x/kernel/setup.c b/arch/c6x/kernel/setup.c
new file mode 100644
index 0000000..8da373e
--- /dev/null
+++ b/arch/c6x/kernel/setup.c
@@ -0,0 +1,550 @@
+/*
+ * linux/arch/c6x/kernel/setup.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file handles the architecture-dependent parts of system setup
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/fb.h>
+#include <linux/genhd.h>
+#include <linux/errno.h>
+#include <linux/console.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/cache.h>
+#include <linux/pm.h>
+#include <linux/dma-mapping.h>
+
+#ifdef CONFIG_MTD_UCLINUX
+#include <linux/mtd/map.h>
+#include <linux/ext2_fs.h>
+#include <linux/cramfs_fs.h>
+#include <linux/romfs_fs.h>
+#endif
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/sections.h>
+
+#include <mach/board.h>
+
+#ifdef CONFIG_BLK_DEV_INITRD
+#include <linux/initrd.h>
+#include <asm/pgtable.h>
+#endif
+
+#include "tags.h"
+
+unsigned long memory_start;
+unsigned long memory_end;
+
+static char c6x_command_line[COMMAND_LINE_SIZE];
+static const char default_command_line[COMMAND_LINE_SIZE] __section(.cmdline) =
+ CONFIG_CMDLINE;
+static const char *cpu_name, *cpu_voltage, *mmu, *fpu, *soc_rev;
+static char __cpu_rev[5], *cpu_rev;
+static size_t initrd_size = CONFIG_BLK_DEV_RAM_SIZE*1024;
+static unsigned int core_id;
+
+#if defined(CONFIG_MTD_PLATRAM) || defined(CONFIG_MTD_PLATRAM_MODULE)
+unsigned int c6x_platram_start;
+unsigned int c6x_platram_size;
+#endif
+
+#if defined(CONFIG_VGA_CONSOLE)
+struct screen_info screen_info;
+#endif
+
+/*
+ * Mach dep functions
+ */
+
+struct tag_header *c6x_tags_pointer __initdata;
+
+unsigned int ticks_per_ns_scaled;
+EXPORT_SYMBOL(ticks_per_ns_scaled);
+
+unsigned int c6x_core_freq;
+EXPORT_SYMBOL(c6x_core_freq);
+
+static void __init get_cpuinfo(void)
+{
+ unsigned cpu_id, rev_id, csr;
+ struct clk *coreclk = clk_get_sys(NULL, "core");
+ unsigned long core_khz;
+
+ if (!IS_ERR(coreclk))
+ c6x_core_freq = clk_get_rate(coreclk);
+ else {
+ printk(KERN_WARNING
+ "Cannot find core clock frequency. Using 700MHz\n");
+ c6x_core_freq = 700000000;
+ }
+
+ core_khz = c6x_core_freq / 1000;
+
+ ticks_per_ns_scaled =
+ ((uint64_t)core_khz << C6X_NDELAY_SCALE) / 1000000;
+
+ csr = get_creg(CSR);
+ cpu_id = csr >> 24;
+ rev_id = (csr >> 16) & 0xff;
+
+ mmu = "none";
+ cpu_voltage = "unknown";
+
+ switch (cpu_id) {
+ case 0:
+ cpu_name = "C67x";
+ fpu = "yes";
+ break;
+ case 2:
+ cpu_name = "C62x";
+ fpu = "none";
+ break;
+ case 8:
+ cpu_name = "C64x";
+ fpu = "none";
+ break;
+ case 12:
+ cpu_name = "C64x";
+ fpu = "none";
+ break;
+ case 16:
+ cpu_name = "C64x+";
+ cpu_voltage = "1.2";
+ fpu = "none";
+ break;
+ default:
+ cpu_name = "unknown";
+ fpu = "none";
+ }
+
+ if (cpu_id < 16) {
+ switch (rev_id) {
+ case 0x1:
+ if (cpu_id > 8) {
+ cpu_rev = "DM640/DM641/DM642/DM643";
+ cpu_voltage = "1.2 - 1.4";
+ } else {
+ cpu_rev = "C6201";
+ cpu_voltage = "2.5";
+ }
+ break;
+ case 0x2:
+ cpu_rev = "C6201B/C6202/C6211";
+ cpu_voltage = "1.8";
+ break;
+ case 0x3:
+ cpu_rev = "C6202B/C6203/C6204/C6205";
+ cpu_voltage = "1.5";
+ break;
+ case 0x201:
+ cpu_rev = "C6701 revision 0 (early CPU)";
+ cpu_voltage = "1.8";
+ break;
+ case 0x202:
+ cpu_rev = "C6701/C6711/C6712";
+ cpu_voltage = "1.8";
+ break;
+ case 0x801:
+ cpu_rev = "C64x";
+ cpu_voltage = "1.5";
+ break;
+ default:
+ cpu_rev = "unknown";
+ }
+ } else {
+ cpu_rev = __cpu_rev;
+ snprintf(__cpu_rev, sizeof(__cpu_rev), "0x%x", cpu_id);
+ }
+
+ core_id = get_coreid();
+
+ printk(KERN_INFO "CPU%d: %s rev %s, %s volts, %uMHz\n",
+ core_id, cpu_name, cpu_rev,
+ cpu_voltage, c6x_core_freq / 1000000);
+#ifdef C6X_SOC_HAS_CORE_REV
+ soc_rev = arch_compute_silicon_rev(arch_get_silicon_rev());
+#else
+ soc_rev = "unknown";
+#endif
+}
+
+#ifdef CONFIG_TMS320C6X_CACHES_ON
+/*
+ * L1 and L2 caches configuration
+ */
+static void cache_init(void)
+{
+ /* Set L2 caches on the the whole L2 SRAM memory */
+ L2_cache_set_mode(L2MODE_SIZE);
+
+ /* Enable L1 */
+ L1_cache_on();
+}
+#endif /* CONFIG_TMS320C6X_CACHES_ON */
+
+static void cache_set(unsigned int start, unsigned int end)
+{
+#ifdef CONFIG_XIP_KERNEL
+ unsigned long _data_len = (unsigned long)__init_end -
+ (unsigned long)_sdata - 1;
+#endif
+
+ /* Set the whole external memory as non-cacheable */
+ disable_caching(RAM_MEMORY_START,
+ RAM_MEMORY_START + BOARD_RAM_SIZE - 1);
+ /*
+ * Then set the external memory used by this Linux instance cacheable.
+ * DMA coherent memory region will be set as non-cacheable later.
+ */
+ enable_caching(CACHE_REGION_START(start),
+ CACHE_REGION_START(end - 1));
+
+#ifdef CONFIG_XIP_KERNEL
+ /* Also for XIP, make kernel code cacheable if in RAM */
+ if (CONFIG_XIP_KERNEL_TEXT_ADDR >= RAM_MEMORY_START &&
+ CONFIG_XIP_KERNEL_TEXT_ADDR < (RAM_MEMORY_START + BOARD_RAM_SIZE))
+ enable_caching(CACHE_REGION_START(CONFIG_XIP_KERNEL_TEXT_ADDR),
+ CACHE_REGION_START((unsigned long)_data_lma +
+ _data_len));
+#endif
+}
+
+#ifdef CONFIG_XIP_KERNEL
+void __init c6x_relocate_xip_data(void)
+{
+ memcpy(_sdata, _data_lma,
+ (unsigned long)__init_end - (unsigned long)_sdata);
+}
+#endif
+
+/*
+ * Early parsing of the command line
+ */
+static int userdef __initdata;
+
+/* "mem=" parsing. */
+static int __init early_mem(char *p)
+{
+ u32 mem_size;
+
+ if (!p)
+ return -EINVAL;
+
+ mem_size = memparse(p, &p);
+ /* don't remove all of memory when handling "mem={invalid}" */
+ if (mem_size == 0)
+ return -EINVAL;
+
+ userdef = 1;
+ memory_end = PAGE_ALIGN(PAGE_OFFSET + mem_size);
+
+ return 0;
+}
+early_param("mem", early_mem);
+
+/* "memdma=" parsing. */
+static int __init early_memdma(char *p)
+{
+ if (!p)
+ return -EINVAL;
+
+ dma_memory_size = memparse(p, &p);
+ if (*p == '@')
+ dma_memory_start = memparse(p, &p);
+
+ return 0;
+}
+early_param("memdma", early_memdma);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+/* "initrd=" parsing. */
+static int __init early_initrd(char *p)
+{
+ if (!p)
+ return -EINVAL;
+
+ initrd_start = memparse(p, &p);
+ if (*p == ',')
+ initrd_size = memparse(p + 1, &p);
+
+ return 0;
+}
+early_param("initrd", early_initrd);
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+#if defined(CONFIG_MTD_PLATRAM) || defined(CONFIG_MTD_PLATRAM_MODULE)
+/* "platram=" parsing. */
+static int __init early_platram(char *p)
+{
+ if (!p)
+ return -EINVAL;
+
+ c6x_platram_start = memparse(p, &p);
+ if (*p == ',')
+ c6x_platram_size = memparse(p + 1, &p);
+
+ return 0;
+}
+early_param("platram", early_platram);
+#endif
+
+#ifdef CONFIG_MTD_UCLINUX
+static unsigned long get_romfs_size(void *addr)
+{
+#ifdef CONFIG_ROMFS_FS
+ if ((*((unsigned long *)addr) == ROMSB_WORD0) &&
+ (*((unsigned long *)addr + 1) == ROMSB_WORD1))
+ return PAGE_ALIGN(be32_to_cpu(*((unsigned long *)addr + 2)));
+#endif
+
+#ifdef CONFIG_CRAMFS
+ if (*((unsigned long *)addr) == CRAMFS_MAGIC)
+ return PAGE_ALIGN(*((unsigned long *)addr + 1));
+#endif
+
+#if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
+ if (le16_to_cpu(*((unsigned short *)addr + 0x21c)) == EXT2_SUPER_MAGIC)
+ return PAGE_ALIGN(le32_to_cpu((*((unsigned long *)addr +
+ 0x101))) * 1024);
+#endif
+
+ return 0;
+}
+
+/*
+ * This is called just before .bss is cleared so that any MTD_UCLINUX
+ * filesystem located in bss can be moved out of the way first.
+ */
+void __init c6x_mtd_early_init(void)
+{
+ unsigned int romfs_size;
+
+ romfs_size = PAGE_ALIGN(get_romfs_size((unsigned *)&__bss_start));
+
+ /* Move ROMFS out of BSS */
+ if (romfs_size)
+ memmove(&_ebss, (int *)&__bss_start, romfs_size);
+}
+
+#endif /* CONFIG_MTD_UCLINUX */
+
+void __init setup_arch(char **cmdline_p)
+{
+ int bootmap_size;
+ struct tag_cmdline *tcmd;
+#if defined(CONFIG_MTD_UCLINUX)
+ unsigned long romfs_size;
+#endif
+
+ if (!c6x_tags_are_valid(c6x_tags_pointer))
+ c6x_tags_pointer = NULL;
+
+ /* interrupts must be masked */
+ local_irq_disable();
+
+ /*
+ * Set the Interrupt Service Table (IST) to the beginning of the
+ * vector table.
+ */
+ set_ist(_vectors_start);
+
+#ifdef CONFIG_TMS320C6X_CACHES_ON
+ /* Perform caches initialization */
+ cache_init();
+#endif
+
+ /* Initialise C6x IRQs */
+ set_creg(IER, 2);
+
+ /* Set peripheral power-down */
+#ifdef CONFIG_PM
+ pwr_pdctl_set(PWR_PDCTL_ALL);
+#endif
+
+ /* Call SOC configuration function */
+ c6x_soc_setup_arch();
+
+ /* Call board configuration function */
+ c6x_board_setup_arch();
+
+ /* Get CPU info */
+ get_cpuinfo();
+
+ /* Memory management */
+ printk(KERN_INFO "Initializing kernel\n");
+
+#if defined(CONFIG_MTD_UCLINUX)
+ romfs_size = get_romfs_size(&_ebss);
+ memory_start = PAGE_ALIGN(((unsigned int) &_ebss) + romfs_size);
+
+ uclinux_ram_map.phys = (unsigned long)&_ebss;
+ uclinux_ram_map.size = romfs_size;
+#else
+ memory_start = PAGE_ALIGN((unsigned int) &_end);
+#endif
+
+ memory_end = PAGE_ALIGN(RAM_MEMORY_START + BOARD_RAM_SIZE);
+
+ init_mm.start_code = (unsigned long) &_stext;
+ init_mm.end_code = (unsigned long) &_etext;
+#if defined(CONFIG_MTD_UCLINUX)
+ init_mm.end_data = (unsigned long) (((unsigned long) &_ebss) +
+ romfs_size);
+ init_mm.brk = (unsigned long) (((unsigned long) &_ebss) +
+ romfs_size);
+#else
+ init_mm.end_data = (unsigned long) &_edata;
+ init_mm.brk = (unsigned long) &_end;
+#endif
+
+ /* Initialize command line */
+ strlcpy(c6x_command_line, default_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = c6x_command_line;
+
+ /* Let cmdline passed through tag array override CONFIG_CMDLINE */
+ tcmd = c6x_tag_find(c6x_tags_pointer, TAG_CMDLINE);
+ if (tcmd)
+ strlcpy(c6x_command_line, tcmd->cmdline, COMMAND_LINE_SIZE);
+
+ /* parse_early_param needs a boot_command_line */
+ strlcpy(boot_command_line, c6x_command_line, COMMAND_LINE_SIZE);
+
+ parse_early_param();
+
+ if (userdef)
+ printk(KERN_INFO "Physical RAM map changed by user\n");
+
+ /* Set caching of external RAM used by Linux */
+ cache_set(PAGE_OFFSET, memory_end);
+
+ /* Initialize the coherent memory */
+ coherent_mem_init();
+
+ /*
+ * Give all the memory to the bootmap allocator, tell it to put the
+ * boot mem_map at the start of memory
+ */
+ bootmap_size = init_bootmem_node(NODE_DATA(0),
+ memory_start >> PAGE_SHIFT,
+ PAGE_OFFSET >> PAGE_SHIFT,
+ memory_end >> PAGE_SHIFT);
+
+ /*
+ * Free the usable memory, we have to make sure we do not free
+ * the bootmem bitmap so we then reserve it after freeing it :-)
+ */
+ free_bootmem(memory_start, memory_end - memory_start);
+ reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
+
+ max_low_pfn = PFN_DOWN(memory_end);
+ min_low_pfn = PFN_UP(memory_start);
+ max_mapnr = max_low_pfn - min_low_pfn;
+
+#if defined(CONFIG_MTD_PLATRAM) || defined(CONFIG_MTD_PLATRAM_MODULE)
+ if (c6x_platram_size) {
+ if (c6x_platram_start < (memory_start + bootmap_size) ||
+ (c6x_platram_start + c6x_platram_size) > memory_end) {
+ printk(KERN_ERR "Invalid platram= argument. "
+ "Out of range %p - %p!\n",
+ (void *)memory_start, (void *)memory_end);
+ c6x_platram_size = 0;
+ } else
+ reserve_bootmem(c6x_platram_start, c6x_platram_size,
+ BOOTMEM_DEFAULT);
+ }
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start) {
+ if (initrd_start >= memory_start &&
+ (initrd_start + initrd_size) <= memory_end) {
+ reserve_bootmem(initrd_start, initrd_size,
+ BOOTMEM_DEFAULT);
+ initrd_end = initrd_start+initrd_size;
+ } else {
+ printk(KERN_ERR
+ "initrd is not contained in normal memory\n"
+ "initrd=(0x%08lx:0x%08lx) normal_mem=(%p:%p)\n"
+ "disabling initrd\n",
+ initrd_start, initrd_start + initrd_size,
+ (void *)memory_start, (void *)memory_end);
+ initrd_start = 0;
+ }
+ } else
+ printk(KERN_INFO "no initrd specified\n");
+#endif
+
+ /* Get kmalloc into gear */
+ paging_init();
+
+#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
+ conswitchp = &dummy_con;
+#endif
+}
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ seq_printf(m,
+ "CPU:\t\t%s\n"
+ "Core revision:\t%s\n"
+ "Core voltage:\t%s\n"
+ "Core id:\t%d\n"
+ "SoC cores:\t%d\n"
+ "MMU:\t\t%s\n"
+ "FPU:\t\t%s\n"
+ "Silicon rev:\t%s\n"
+ "Clocking:\t%uMHz\n"
+ "BogoMips:\t%lu.%02lu\n"
+ "Calibration:\t%lu loops\n",
+ cpu_name, cpu_rev, cpu_voltage, core_id, CORE_NUM, mmu, fpu,
+ soc_rev, (c6x_core_freq + 500000) / 1000000,
+ (loops_per_jiffy/(500000/HZ)),
+ (loops_per_jiffy/(5000/HZ))%100,
+ loops_per_jiffy);
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < 1 ? (void *)1 : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return NULL;
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+ c_start,
+ c_stop,
+ c_next,
+ show_cpuinfo
+};
+
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
new file mode 100644
index 0000000..252c9ec
--- /dev/null
+++ b/arch/c6x/kernel/signal.c
@@ -0,0 +1,384 @@
+/*
+ * linux/arch/c6x/kernel/signal.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@...hat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/highuid.h>
+#include <linux/personality.h>
+#include <linux/tracehook.h>
+#include <linux/uaccess.h>
+#include <linux/syscalls.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/ucontext.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/traps.h>
+#include <asm/cacheflush.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+/*
+ * Do a signal return, undo the signal stack.
+ */
+
+#define RETCODE_SIZE (9 << 2) /* 9 instructions = 36 bytes */
+
+struct rt_sigframe {
+ struct siginfo __user *pinfo;
+ void __user *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned long retcode[RETCODE_SIZE >> 2];
+};
+
+static int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+{
+ int err = 0;
+
+#define COPY(x) (err |= __get_user(regs->x, &sc->sc_##x))
+
+ COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
+ COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
+ COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
+
+ COPY(a16); COPY(a17); COPY(a18); COPY(a19);
+ COPY(a20); COPY(a21); COPY(a22); COPY(a23);
+ COPY(a24); COPY(a25); COPY(a26); COPY(a27);
+ COPY(a28); COPY(a29); COPY(a30); COPY(a31);
+ COPY(b16); COPY(b17); COPY(b18); COPY(b19);
+ COPY(b20); COPY(b21); COPY(b22); COPY(b23);
+ COPY(b24); COPY(b25); COPY(b26); COPY(b27);
+ COPY(b28); COPY(b29); COPY(b30); COPY(b31);
+
+ COPY(csr); COPY(pc);
+
+#undef COPY
+
+ return err;
+}
+
+asmlinkage int do_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ sigset_t set;
+
+ /*
+ * Since we stacked the signal on a dword boundary,
+ * then 'sp' should be dword aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->sp & 7)
+ goto badframe;
+
+ frame = (struct rt_sigframe __user *) ((unsigned long) regs->sp + 8);
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ goto badframe;
+
+ return regs->a4;
+
+badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static int
+setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
+ unsigned long mask)
+{
+ int err = 0;
+
+ err |= __put_user(mask, &sc->sc_mask);
+
+#define COPY(x) (err |= __put_user(regs->x, &sc->sc_##x))
+
+ COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
+ COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
+ COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
+
+ COPY(a16); COPY(a17); COPY(a18); COPY(a19);
+ COPY(a20); COPY(a21); COPY(a22); COPY(a23);
+ COPY(a24); COPY(a25); COPY(a26); COPY(a27);
+ COPY(a28); COPY(a29); COPY(a30); COPY(a31);
+ COPY(b16); COPY(b17); COPY(b18); COPY(b19);
+ COPY(b20); COPY(b21); COPY(b22); COPY(b23);
+ COPY(b24); COPY(b25); COPY(b26); COPY(b27);
+ COPY(b28); COPY(b29); COPY(b30); COPY(b31);
+
+ COPY(csr); COPY(pc);
+
+#undef COPY
+
+ return err;
+}
+
+static inline void __user *get_sigframe(struct k_sigaction *ka,
+ struct pt_regs *regs,
+ unsigned long framesize)
+{
+ unsigned long sp = regs->sp;
+
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(sp) == 0)
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ /*
+ * No matter what happens, 'sp' must be dword
+ * aligned otherwise nasty things will happen
+ */
+ return (void __user *)((sp - framesize) & ~7);
+}
+
+static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ unsigned long __user *retcode;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto segv_and_exit;
+
+ err |= __put_user(&frame->info, &frame->pinfo);
+ err |= __put_user(&frame->uc, &frame->puc);
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Clear all the bits of the ucontext we don't use. */
+ err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
+
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ /* Set up to return from userspace */
+ retcode = (unsigned long __user *) &frame->retcode;
+ err |= put_user(0x0000002AUL | (__NR_rt_sigreturn << 7), retcode++);
+ /* MVK __NR_rt_sigreturn,B0 */
+ err |= put_user(0x10000000UL, retcode++); /* SWE */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+ err |= put_user(0x00006000UL, retcode++); /* NOP 4 */
+
+ if (err)
+ goto segv_and_exit;
+
+ flush_icache_range((unsigned long) &frame->retcode,
+ (unsigned long) &frame->retcode + RETCODE_SIZE);
+
+ retcode = (unsigned long __user *) &frame->retcode;
+
+ /* Change user context to branch to signal handler */
+ regs->sp = (unsigned long) frame - 8;
+ regs->b3 = (unsigned long) retcode;
+ regs->pc = (unsigned long) ka->sa.sa_handler;
+
+ /* Give the signal number to the handler */
+ regs->a4 = signr;
+
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@...ark.greenend.org.uk> 2000-12-06
+ */
+ regs->b4 = (unsigned long)&frame->info;
+ regs->a6 = (unsigned long)&frame->uc;
+
+ return 0;
+
+segv_and_exit:
+ force_sig(SIGSEGV, current);
+ return -EFAULT;
+}
+
+static inline void
+handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
+{
+ switch (regs->a4) {
+ case -ERESTARTNOHAND:
+ if (!has_handler)
+ goto do_restart;
+ regs->a4 = -EINTR;
+ break;
+
+ case -ERESTARTSYS:
+ if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
+ regs->a4 = -EINTR;
+ break;
+ }
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+do_restart:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ break;
+ }
+}
+
+/*
+ * handle the actual delivery of a signal to userspace
+ */
+static int handle_signal(int sig,
+ siginfo_t *info, struct k_sigaction *ka,
+ sigset_t *oldset, struct pt_regs *regs,
+ int syscall)
+{
+ int ret;
+
+ /* Are we from a system call? */
+ if (syscall) {
+ /* If so, check system call restarting.. */
+ switch (regs->a4) {
+ case -ERESTART_RESTARTBLOCK:
+ case -ERESTARTNOHAND:
+ regs->a4 = -EINTR;
+ break;
+
+ case -ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ regs->a4 = -EINTR;
+ break;
+ }
+
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ }
+ }
+
+ /* Set up the stack frame */
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
+ if (ret == 0) {
+ spin_lock_irq(¤t->sighand->siglock);
+ sigorsets(¤t->blocked, ¤t->blocked,
+ &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(¤t->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+ }
+
+ return ret;
+}
+
+/*
+ * handle a potential signal
+ */
+static void do_signal(struct pt_regs *regs, int syscall)
+{
+ struct k_sigaction ka;
+ siginfo_t info;
+ sigset_t *oldset;
+ int signr;
+
+ /* we want the common case to go fast, which is why we may in certain
+ * cases get here from kernel mode */
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = ¤t->saved_sigmask;
+ else
+ oldset = ¤t->blocked;
+
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ if (signr > 0) {
+ if (handle_signal(signr, &info, &ka, oldset,
+ regs, syscall) == 0) {
+ /* a signal was successfully delivered; the saved
+ * sigmask will have been stored in the signal frame,
+ * and will be restored by sigreturn, so we can simply
+ * clear the TIF_RESTORE_SIGMASK flag */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+ tracehook_signal_handler(signr, &info, &ka, regs, 0);
+ }
+
+ return;
+ }
+
+ /* did we come from a system call? */
+ if (syscall) {
+ /* restart the system call - no handlers present */
+ switch (regs->a4) {
+ case -ERESTARTNOHAND:
+ case -ERESTARTSYS:
+ case -ERESTARTNOINTR:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ break;
+
+ case -ERESTART_RESTARTBLOCK:
+ regs->a4 = regs->orig_a4;
+ regs->b0 = __NR_restart_syscall;
+ regs->pc -= 4;
+ break;
+ }
+ }
+
+ /* if there's no signal to deliver, we just put the saved sigmask
+ * back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
+ }
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by current->work.notify_resume
+ */
+asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags,
+ int syscall)
+{
+ /* deal with pending signal delivery */
+ if (thread_info_flags & ((1 << TIF_SIGPENDING) |
+ (1 << TIF_RESTORE_SIGMASK)))
+ do_signal(regs, syscall);
+
+ if (thread_info_flags & (1 << TIF_NOTIFY_RESUME)) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
+}
diff --git a/arch/c6x/kernel/switch_to.S b/arch/c6x/kernel/switch_to.S
new file mode 100644
index 0000000..06a41bb
--- /dev/null
+++ b/arch/c6x/kernel/switch_to.S
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter (msalter@...hat.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/asm-offsets.h>
+
+#define SP B15
+
+ /*
+ * void __switch_to(struct thread_info *prev,
+ * struct thread_info *next,
+ * struct task_struct *tsk) ;
+ */
+ .global __switch_to
+__switch_to:
+
+ LDDW .D2T2 *+B4(THREAD_B15_14),B7:B6
+ || MV .L2X A4,B5 ; prev
+ || MV .L1X B4,A5 ; next
+ || MVC .S2 RILC,B1
+
+ STW .D2T2 B3,*+B5(THREAD_PC)
+ || STDW .D1T1 A13:A12,*+A4(THREAD_A13_12)
+ || MVC .S2 ILC,B0
+
+ LDW .D2T2 *+B4(THREAD_PC),B3
+ || LDDW .D1T1 *+A5(THREAD_A13_12),A13:A12
+
+ STDW .D1T1 A11:A10,*+A4(THREAD_A11_10)
+ || STDW .D2T2 B1:B0,*+B5(THREAD_RICL_ICL)
+ || MVKL .S2 current_ksp,B1
+
+ STDW .D2T2 B15:B14,*+B5(THREAD_B15_14)
+ || STDW .D1T1 A15:A14,*+A4(THREAD_A15_14)
+ || MVKH .S2 current_ksp,B1
+
+ ;; Switch to next SP
+ MV .S2 B7,SP
+ || STW .D2T2 B7,*B1
+ || MV .L2 B6,B14
+ || LDDW .D1T1 *+A5(THREAD_RICL_ICL),A1:A0
+
+ STDW .D2T2 B11:B10,*+B5(THREAD_B11_10)
+ || LDDW .D1T1 *+A5(THREAD_A15_14),A15:A14
+
+ STDW .D2T2 B13:B12,*+B5(THREAD_B13_12)
+ || LDDW .D1T1 *+A5(THREAD_A11_10),A11:A10
+
+ B .S2 B3 ; return in next E1
+ || LDDW .D2T2 *+B4(THREAD_B13_12),B13:B12
+
+ LDDW .D2T2 *+B4(THREAD_B11_10),B11:B10
+ NOP
+
+ MV .L2X A0,B0
+ || MV .S1 A6,A4
+
+ MVC .S2 B0,ILC
+ || MV .L2X A1,B1
+
+ MVC .S2 B1,RILC
+
diff --git a/arch/c6x/kernel/sys_c6x.c b/arch/c6x/kernel/sys_c6x.c
new file mode 100644
index 0000000..5d0ee49
--- /dev/null
+++ b/arch/c6x/kernel/sys_c6x.c
@@ -0,0 +1,111 @@
+/*
+ * linux/arch/c6x/kernel/sys_c6x.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the C6x platform.
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/module.h>
+#include <linux/syscalls.h>
+#include <linux/mtd/map.h>
+#include <linux/stringify.h>
+#include <linux/uaccess.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/syscalls.h>
+
+#ifdef CONFIG_ACCESS_CHECK
+int _access_ok(unsigned long addr, unsigned long size)
+{
+ if (!size)
+ return 1;
+
+ if (!addr || addr > (0xffffffffUL - (size - 1)))
+ goto _bad_access;
+
+ if (segment_eq(get_fs(), KERNEL_DS))
+ return 1;
+
+ if (memory_start <= addr && (addr + size - 1) < memory_end)
+ return 1;
+
+_bad_access:
+#if 0
+ printk(KERN_CRIT "**Bad access attempt: pid[%d] addr[%p] size[0x%x]\n",
+ current->pid, addr, size);
+#endif
+ return 0;
+}
+EXPORT_SYMBOL(_access_ok);
+#endif
+
+/* sys_cache_sync -- sync caches over given range */
+asmlinkage int sys_cache_sync(unsigned long s, unsigned long e)
+{
+ /* FIXME. Add range checks */
+
+ L1D_cache_block_writeback_invalidate(s, e);
+ L1P_cache_block_invalidate(s, e);
+
+ return 0;
+}
+
+asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, off_t offset)
+{
+ if (offset & ~PAGE_MASK)
+ return -EINVAL;
+ return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+}
+
+/* Provide the actual syscall number to call mapping. */
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+/*
+ * Use trampolines
+ */
+#define sys_pread64 sys_pread_c6x
+#define sys_pwrite64 sys_pwrite_c6x
+#define sys_truncate64 sys_truncate64_c6x
+#define sys_ftruncate64 sys_ftruncate64_c6x
+#define sys_fadvise64 sys_fadvise64_c6x
+#define sys_fadvise64_64 sys_fadvise64_64_c6x
+#define sys_fallocate sys_fallocate_c6x
+
+/* Use sys_mmap_pgoff directly */
+#define sys_mmap2 sys_mmap_pgoff
+
+/*
+ * Note that we can't include <linux/unistd.h> here since the header
+ * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
+ */
+void *sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls-1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
+
diff --git a/arch/c6x/kernel/tags.c b/arch/c6x/kernel/tags.c
new file mode 100644
index 0000000..bb1064a
--- /dev/null
+++ b/arch/c6x/kernel/tags.c
@@ -0,0 +1,98 @@
+/*
+ * tags.c
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Author: Mark Salter <msalter@...hat.com>
+ *
+ * GPLv2 LICENSE SUMMARY
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * BSD LICENSE
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Texas Instruments nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/types.h>
+
+#include "tags.h"
+
+#define TAG_NEXT(p) \
+ ((struct tag_header *)((char *)p + (((struct tag_header *)p)->size) \
+ + sizeof(struct tag_header)))
+
+struct tag_header *c6x_tag_next(struct tag_header *atag)
+{
+ if (atag->tag == TAG_EOL)
+ return NULL;
+
+ atag = TAG_NEXT(atag);
+ if (atag->tag == TAG_EOL)
+ return NULL;
+
+ return atag;
+}
+
+void *c6x_tag_find(struct tag_header *atag, unsigned int tag)
+{
+ while (atag && atag->tag != TAG_EOL && atag->tag != tag)
+ atag = c6x_tag_next(atag);
+ if (atag && atag->tag == tag)
+ return (void *)((unsigned long)atag + sizeof(*atag));
+ return NULL;
+}
+
+int c6x_tags_are_valid(struct tag_header *atag)
+{
+ if (!atag)
+ return 0;
+
+ if (atag->tag != TAG_SOL || atag->size)
+ return 0;
+
+ return 1;
+}
+
+
diff --git a/arch/c6x/kernel/tags.h b/arch/c6x/kernel/tags.h
new file mode 100644
index 0000000..9c4496d
--- /dev/null
+++ b/arch/c6x/kernel/tags.h
@@ -0,0 +1,82 @@
+/*
+ * tags.h
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Author: Mark Salter <msalter@...hat.com>
+ *
+ * GPLv2 LICENSE SUMMARY
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * BSD LICENSE
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Texas Instruments nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define TAGS_MAGIC 0x54694265
+
+/* The list must start with an TAG_SOL */
+#define TAG_SOL 0x64000001
+
+/* The list must end with an TAG_EOL */
+#define TAG_EOL 0x64000002
+
+#define TAG_CMDLINE 0x64000003
+
+#ifndef __ASSEMBLY__
+struct tag_header {
+ unsigned int size;
+ unsigned int tag;
+};
+
+struct tag_cmdline {
+ char cmdline[0];
+};
+
+extern int c6x_tags_are_valid(struct tag_header *atag);
+extern struct tag_header *c6x_tag_next(struct tag_header *atag);
+extern void *c6x_tag_find(struct tag_header *atag, unsigned int tag);
+#endif
diff --git a/arch/c6x/kernel/time.c b/arch/c6x/kernel/time.c
new file mode 100644
index 0000000..d969b48
--- /dev/null
+++ b/arch/c6x/kernel/time.c
@@ -0,0 +1,55 @@
+/*
+ * linux/arch/c6x/kernel/time.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+
+#include <asm/segment.h>
+#include <linux/io.h>
+#include <asm/irq.h>
+#include <asm/timer.h>
+
+#include <linux/timex.h>
+#include <linux/profile.h>
+
+static u32 sched_clock_multiplier;
+#define SCHED_CLOCK_SHIFT 16
+
+/*
+ * scheduler clock - returns current time in nanosec units.
+ */
+u64 sched_clock(void)
+{
+ u64 tsc;
+
+ /* read the TSC value
+ */
+ tsc = get_cycles();
+
+ return (tsc * sched_clock_multiplier) >> SCHED_CLOCK_SHIFT;
+}
+
+void time_init(void)
+{
+ sched_clock_multiplier = ((u64)NSEC_PER_SEC << SCHED_CLOCK_SHIFT) /
+ c6x_core_freq;
+
+ c6x_arch_init_clocksource();
+ c6x_arch_init_clockevents();
+}
+
diff --git a/arch/c6x/kernel/traps.c b/arch/c6x/kernel/traps.c
new file mode 100644
index 0000000..ddb78da
--- /dev/null
+++ b/arch/c6x/kernel/traps.c
@@ -0,0 +1,416 @@
+/*
+ * linux/arch/c6x/kernel/traps.c
+ *
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Sets up all exception vectors
+ */
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/user.h>
+#include <linux/string.h>
+#include <linux/linkage.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+#include <linux/ptrace.h>
+#include <linux/bug.h>
+
+#include <asm/setup.h>
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/pgtable.h>
+#include <linux/bitops.h>
+#include <asm/irq.h>
+
+void __init trap_init(void)
+{
+ ack_exception(EXCEPT_TYPE_NXF);
+ ack_exception(EXCEPT_TYPE_EXC);
+ ack_exception(EXCEPT_TYPE_IXF);
+ ack_exception(EXCEPT_TYPE_SXF);
+ enable_exception();
+}
+
+void dump_stack(void)
+{
+ unsigned long stack;
+
+ show_stack(current, &stack);
+}
+EXPORT_SYMBOL(dump_stack);
+
+
+void die(char *str, struct pt_regs *fp, int nr)
+{
+ console_verbose();
+ printk(KERN_ERR "%s: %08x\n", str, nr);
+ show_regs(fp);
+
+ if (*((unsigned long *) (PAGE_SIZE + (unsigned long) current))
+ != STACK_MAGIC)
+ printk(KERN_ERR "Corrupted stack page\n");
+ printk(KERN_ERR "Process %s (pid: %d, stackpage=%08lx)\n",
+ current->comm, current->pid, (PAGE_SIZE +
+ (unsigned long) current));
+
+ dump_stack();
+ while (1)
+ ;
+}
+
+static void die_if_kernel(char *str, struct pt_regs *fp, int nr)
+{
+ if (user_mode(fp))
+ return;
+
+ die(str, fp, nr);
+}
+
+
+/* Internal exceptions */
+static struct exception_info iexcept_table[10] = {
+ { "Oops - instruction fetch", SIGBUS, BUS_ADRERR },
+ { "Oops - fetch packet", SIGBUS, BUS_ADRERR },
+ { "Oops - execute packet", SIGILL, ILL_ILLOPC },
+ { "Oops - undefined instruction", SIGILL, ILL_ILLOPC },
+ { "Oops - resource conflict", SIGILL, ILL_ILLOPC },
+ { "Oops - resource access", SIGILL, ILL_PRVREG },
+ { "Oops - privilege", SIGILL, ILL_PRVOPC },
+ { "Oops - loops buffer", SIGILL, ILL_ILLOPC },
+ { "Oops - software exception", SIGILL, ILL_ILLTRP },
+ { "Oops - unknown exception", SIGILL, ILL_ILLOPC }
+};
+
+/* External exceptions */
+static struct exception_info eexcept_table[128] = {
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
+ { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
+ { "Oops - EMC bus error", SIGBUS, BUS_ADRERR }
+};
+
+static void do_trap(struct exception_info *except_info, struct pt_regs *regs)
+{
+ unsigned long addr = instruction_pointer(regs);
+ siginfo_t info;
+
+ if (except_info->code != TRAP_BRKPT)
+ printk(KERN_DEBUG "TRAP: %s PC[0x%lx] signo[%d] code[%d]\n",
+ except_info->kernel_str, regs->pc,
+ except_info->signo, except_info->code);
+
+ die_if_kernel(except_info->kernel_str, regs, addr);
+
+ info.si_signo = except_info->signo;
+ info.si_errno = 0;
+ info.si_code = except_info->code;
+ info.si_addr = (void __user *)addr;
+
+ force_sig_info(except_info->signo, &info, current);
+}
+
+/*
+ * Process an internal exception (non maskable)
+ */
+static int process_iexcept(struct pt_regs *regs)
+{
+ unsigned int iexcept_report = get_iexcept();
+ unsigned int iexcept_num;
+
+ ack_exception(EXCEPT_TYPE_IXF);
+
+ printk(KERN_ERR "IEXCEPT: PC[0x%lx]\n", regs->pc);
+
+ while (iexcept_report) {
+ iexcept_num = __ffs(iexcept_report);
+ iexcept_report &= ~(1 << iexcept_num);
+ set_iexcept(iexcept_report);
+ if (*(unsigned int *)regs->pc == BKPT_OPCODE) {
+ /* This is a breakpoint */
+ struct exception_info bkpt_exception = {
+ "Oops - undefined instruction",
+ SIGTRAP, TRAP_BRKPT
+ };
+ do_trap(&bkpt_exception, regs);
+ iexcept_report &= ~(0xFF);
+ set_iexcept(iexcept_report);
+ continue;
+ }
+
+ do_trap(&iexcept_table[iexcept_num], regs);
+ }
+ return 0;
+}
+
+/*
+ * Process an external exception (maskable)
+ */
+static void process_eexcept(struct pt_regs *regs)
+{
+ unsigned int eexcept_num;
+ unsigned int bank = 0;
+ int i;
+
+ printk(KERN_ERR "EEXCEPT: PC[0x%lx]\n", regs->pc);
+
+ for (i = 0; i <= 3; i++) {
+ while (IC_MEXPMASK[i]) {
+ __dint();
+ eexcept_num = __ffs(IC_MEXPMASK[i]);
+ IC_MEXPMASK[i] &= ~(1 << eexcept_num); /* ack the external exception */
+ __rint();
+ do_trap(&eexcept_table[eexcept_num +
+ (bank << 5)], regs);
+ }
+ bank++;
+ }
+
+ ack_exception(EXCEPT_TYPE_EXC);
+}
+
+void (*mach_nmi_handler)(struct pt_regs *regs);
+
+/*
+ * Main exception processing
+ */
+asmlinkage int process_exception(struct pt_regs *regs)
+{
+ unsigned int type;
+ unsigned int type_num;
+ unsigned int ie_num = 9; /* default is unknown exception */
+
+ while ((type = get_except_type()) != 0) {
+ type_num = fls(type) - 1;
+
+ switch (type_num) {
+ case EXCEPT_TYPE_NXF:
+ ack_exception(EXCEPT_TYPE_NXF);
+ die("Oops - NMI detected", regs,
+ instruction_pointer(regs));
+ break;
+
+ case EXCEPT_TYPE_IXF:
+ if (process_iexcept(regs))
+ return 1;
+ break;
+
+ case EXCEPT_TYPE_EXC:
+ process_eexcept(regs);
+ break;
+
+ case EXCEPT_TYPE_SXF:
+ ie_num = 8;
+ default:
+ ack_exception(type_num);
+ do_trap(&iexcept_table[ie_num], regs);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int kstack_depth_to_print = 48;
+
+static void show_trace(unsigned long *stack, unsigned long *endstack)
+{
+ unsigned long addr;
+ int i;
+
+ printk(KERN_DEBUG "Call trace:");
+ i = 0;
+ while (stack + 1 <= endstack) {
+ addr = *stack++;
+ /*
+ * If the address is either in the text segment of the
+ * kernel, or in the region which contains vmalloc'ed
+ * memory, it *may* be the address of a calling
+ * routine; if so, print it so that someone tracing
+ * down the cause of the crash will be able to figure
+ * out the call path that was taken.
+ */
+ if (__kernel_text_address(addr)) {
+#ifndef CONFIG_KALLSYMS
+ if (i % 5 == 0)
+ printk(KERN_DEBUG "\n ");
+#endif
+ printk(KERN_DEBUG " [<%08lx>]", addr);
+ print_symbol(" %s\n", addr);
+ i++;
+ }
+ }
+ printk(KERN_DEBUG "\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+ unsigned long *p, *endstack;
+ int i;
+
+ if (!stack) {
+ if (task && task != current)
+ /* We know this is a kernel stack,
+ so this is the start/end */
+ stack = (unsigned long *)thread_saved_ksp(task);
+ else
+ stack = (unsigned long *)&stack;
+ }
+ endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1)
+ & -THREAD_SIZE);
+
+ printk(KERN_DEBUG "Stack from %08lx:", (unsigned long)stack);
+ for (i = 0, p = stack; i < kstack_depth_to_print; i++) {
+ if (p + 1 > endstack)
+ break;
+ if (i % 8 == 0)
+ printk(KERN_CONT "\n ");
+ printk(KERN_CONT " %08lx", *p++);
+ }
+ printk(KERN_CONT "\n");
+ show_trace(stack, endstack);
+}
+
+int is_valid_bugaddr(unsigned long addr)
+{
+ return __kernel_text_address(addr);
+}
+
diff --git a/arch/c6x/kernel/vectors.S b/arch/c6x/kernel/vectors.S
new file mode 100644
index 0000000..8e65550
--- /dev/null
+++ b/arch/c6x/kernel/vectors.S
@@ -0,0 +1,81 @@
+;
+; linux/arch/c6x/kernel/vector.s
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@...una.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+; This section handles all the interrupt vector routines.
+; At RESET the processor sets up the DRAM timing parameters and
+; branches to the label _c_int00 which handles initialization for the C code.
+;
+
+#define ALIGNMENT 5
+
+#ifdef CONFIG_BIG_KERNEL
+ .macro IRQVEC name, handler
+ .align ALIGNMENT
+ .global \name
+\name: STW .D2T1 A0,*B15--[2]
+ || MVKL .S1 \handler,A0
+ MVKH .S1 \handler,A0
+ B .S2X A0
+ LDW .D2T1 *++B15[2],A0
+ NOP 4
+ NOP
+ NOP
+ .endm
+#else /* CONFIG_BIG_KERNEL */
+ .macro IRQVEC name, handler
+ .align ALIGNMENT
+ .global \name
+\name: B .S2 \handler
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ .endm
+#endif /* CONFIG_BIG_KERNEL */
+
+ .sect ".vectors","ax"
+ .align ALIGNMENT
+#ifdef CONFIG_BIG_KERNEL
+RESET: MVKL .S1 _c_int00,A0 ; branch to _c_int00
+ MVKH .S1 _c_int00,A0
+ B .S2X A0
+#else
+RESET: B .S2 _c_int00
+ NOP
+ NOP
+#endif
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+
+
+ IRQVEC NMI,_nmi_handler ; NMI interrupt
+ IRQVEC AINT,_bad_interrupt ; reserved
+ IRQVEC MSGINT,_bad_interrupt ; reserved
+
+ IRQVEC INT4,_int4_handler
+ IRQVEC INT5,_int5_handler
+ IRQVEC INT6,_int6_handler
+ IRQVEC INT7,_int7_handler
+ IRQVEC INT8,_int8_handler
+ IRQVEC INT9,_int9_handler
+ IRQVEC INT10,_int10_handler
+ IRQVEC INT11,_int11_handler
+ IRQVEC INT12,_int12_handler
+ IRQVEC INT13,_int13_handler
+ IRQVEC INT14,_int14_handler
+ IRQVEC INT15,_int15_handler
diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..10e6177
--- /dev/null
+++ b/arch/c6x/kernel/vmlinux.lds.S
@@ -0,0 +1,205 @@
+/*
+ * ld script for the c6x kernel
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Mark Salter <msalter@...hat.com>
+ */
+#define __VMLINUX_LDS__
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <mach/board.h>
+
+
+ENTRY(_c_int00)
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+jiffies = jiffies_64 + 4;
+#else
+jiffies = jiffies_64;
+#endif
+
+SECTIONS
+{
+#ifdef CONFIG_XIP_KERNEL
+ . = CONFIG_XIP_KERNEL_TEXT_ADDR;
+#else
+ . = PAGE_OFFSET;
+#endif
+
+ .vectors :
+ {
+ VMLINUX_SYMBOL(_vectors_start) = .;
+ *(.vectors)
+ VMLINUX_SYMBOL(_vectors_end) = .;
+ }
+
+#ifdef CONFIG_XIP_KERNEL
+ . = CONFIG_XIP_KERNEL_TEXT_ADDR + 0x400;
+#else
+ . = PAGE_OFFSET + 0x400;
+#endif
+ . = ALIGN(0x1000);
+ .cmdline : { *(.cmdline) }
+
+ /* read-only */
+ .text :
+ {
+ VMLINUX_SYMBOL(_stext) = .;
+ VMLINUX_SYMBOL(_text) = .;
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ IRQENTRY_TEXT
+ KPROBES_TEXT
+#if defined(CONFIG_XIP_KERNEL) || !defined(CONFIG_BIG_KERNEL)
+ VMLINUX_SYMBOL(_sinittext) = .;
+ INIT_TEXT
+ VMLINUX_SYMBOL(_einittext) = .;
+ EXIT_TEXT
+#endif
+ *(.fixup)
+ *(.gnu.warning)
+ }
+
+ EXCEPTION_TABLE(16)
+ NOTES
+
+ RO_DATA_SECTION(32)
+ .rodata_c6x :
+ {
+ *(.const)
+ *(.switch)
+ }
+ . = ALIGN(8);
+ .dynamic :
+ {
+ *(.dynamic)
+ }
+ . = ALIGN(128);
+ VMLINUX_SYMBOL(_rodata_end) = .;
+
+ VMLINUX_SYMBOL(_etext) = .;
+
+#ifdef CONFIG_XIP_KERNEL
+ . = PAGE_OFFSET;
+ .bss : AT(VMLINUX_SYMBOL(_rodata_end))
+#else
+ .bss :
+#endif
+ {
+ VMLINUX_SYMBOL(__bss_start) = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ *(.far)
+ . = ALIGN(128);
+ VMLINUX_SYMBOL(__bss_stop) = .;
+ VMLINUX_SYMBOL(__bss_stop) = .;
+ }
+
+#ifdef CONFIG_XIP_KERNEL
+ .data : AT(LOADADDR(.bss) + SIZEOF(.bss))
+#else
+ .data :
+#endif
+ {
+ VMLINUX_SYMBOL(_sdata) = .;
+ INIT_TASK_DATA(THREAD_SIZE)
+ NOSAVE_DATA
+ PAGE_ALIGNED_DATA(PAGE_SIZE)
+ CACHELINE_ALIGNED_DATA(128)
+ READ_MOSTLY_DATA(128)
+ DATA_DATA
+ CONSTRUCTORS
+ *(.data1)
+ *(.fardata .fardata.*)
+ . = ALIGN(8);
+ }
+#ifdef CONFIG_XIP_KERNEL
+ .neardata : AT(LOADADDR(.data) + SIZEOF(.data))
+#else
+ .neardata :
+#endif
+ {
+ *(.neardata .neardata.* .gnu.linkonce.s.*)
+#ifdef CONFIG_XIP_KERNEL
+ /* The init section should be last, so when we free it, it goes into
+ * the general memory pool, and (hopefully) will decrease fragmentation
+ * a tiny bit. The init section has a _requirement_ that it be
+ * PAGE_SIZE aligned
+ */
+ . = ALIGN(PAGE_SIZE);
+#endif
+ }
+
+ VMLINUX_SYMBOL(_edata) = .;
+ VMLINUX_SYMBOL(_data_lma) = LOADADDR(.data);
+
+ VMLINUX_SYMBOL(__init_begin) = .;
+
+#ifndef CONFIG_XIP_KERNEL
+#ifdef CONFIG_BIG_KERNEL
+ INIT_TEXT_SECTION(PAGE_SIZE)
+
+ /* We have to discard exit text and such at runtime, not link time, to
+ * handle embedded cross-section references (alt instructions, bug
+ * table, eh_frame, etc...). We need all of our .text up front and
+ * .data after it for PCREL call issues.
+ */
+ .exit.text :
+ {
+ EXIT_TEXT
+ }
+ . = ALIGN(16);
+#endif
+ INIT_DATA_SECTION(16)
+ PERCPU(128,PAGE_SIZE)
+
+ .exit.data :
+ {
+ EXIT_DATA
+ }
+#else
+ .init.data : AT(LOADADDR(.neardata) + SIZEOF(.neardata))
+ {
+ VMLINUX_SYMBOL(_sinitdata) = .;
+ INIT_DATA
+ INIT_SETUP(16)
+ INIT_CALLS
+ CON_INITCALL
+ SECURITY_INITCALL
+ INIT_RAM_FS
+ . = ALIGN(8);
+ VMLINUX_SYMBOL(__per_cpu_load) = .;
+ VMLINUX_SYMBOL(__per_cpu_start) = .;
+ *(.data.percpu.first)
+ *(.data.percpu.page_aligned)
+ *(.data.percpu)
+ *(.data.percpu.shared_aligned)
+ VMLINUX_SYMBOL(__per_cpu_end) = .;
+
+ EXIT_DATA
+
+ . = ALIGN(8);
+ }
+#endif
+ . = ALIGN(PAGE_SIZE);
+
+ VMLINUX_SYMBOL(__init_end) = .;
+
+ /*
+ * _ebss is used solely for CONFIG_MTD_UCLINUX support.
+ * Traditionally, _ebss (end of .bss) would be the end of a kernel
+ * image where a ROMFS could be appended. In this case, .bss is
+ * elsewhere but we define _ebss at the end.
+ */
+ VMLINUX_SYMBOL(_ebss) = .;
+
+ VMLINUX_SYMBOL(_end) = . ;
+
+ STABS_DEBUG
+
+ DWARF_DEBUG
+
+ DISCARDS
+}
--
1.6.2.5
--
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