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Date: Wed, 26 Aug 2009 14:24:09 +0800
From: Chen Liqin <liqin.chen@...plusct.com>
To: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, torvalds@...ux-foundation.org
Subject: Subject: [PATCH 17/33] score: create head files pci.h processor.h
thread_info.h topology.h
>>From e8bb30582c7a43a8a568041d2ad6239b99b637e3 Mon Sep 17 00:00:00 2001
From: Chen Liqin <liqin.chen@...plusct.com>
Date: Wed, 26 Aug 2009 10:05:04 +0800
Subject: [PATCH 17/33] score: create head files pci.h processor.h thread_info.h topology.h
Signed-off-by: Chen Liqin <liqin.chen@...plusct.com>
---
arch/score/include/asm/pci.h | 4 +
arch/score/include/asm/processor.h | 106 ++++++++++++++++++++++++++++++++++
arch/score/include/asm/thread_info.h | 103 +++++++++++++++++++++++++++++++++
arch/score/include/asm/topology.h | 6 ++
4 files changed, 219 insertions(+), 0 deletions(-)
create mode 100644 arch/score/include/asm/pci.h
create mode 100644 arch/score/include/asm/processor.h
create mode 100644 arch/score/include/asm/thread_info.h
create mode 100644 arch/score/include/asm/topology.h
diff --git a/arch/score/include/asm/pci.h b/arch/score/include/asm/pci.h
new file mode 100644
index 0000000..3f3cfd8
--- /dev/null
+++ b/arch/score/include/asm/pci.h
@@ -0,0 +1,4 @@
+#ifndef _ASM_SCORE_PCI_H
+#define _ASM_SCORE_PCI_H
+
+#endif /* _ASM_SCORE_PCI_H */
diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h
new file mode 100644
index 0000000..7e22f21
--- /dev/null
+++ b/arch/score/include/asm/processor.h
@@ -0,0 +1,106 @@
+#ifndef _ASM_SCORE_PROCESSOR_H
+#define _ASM_SCORE_PROCESSOR_H
+
+#include <linux/cpumask.h>
+#include <linux/threads.h>
+
+#include <asm/segment.h>
+
+struct task_struct;
+
+/*
+ * System setup and hardware flags..
+ */
+extern void (*cpu_wait)(void);
+
+extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+extern void start_thread(struct pt_regs *regs,
+ unsigned long pc, unsigned long sp);
+extern unsigned long get_wchan(struct task_struct *p);
+
+/*
+ * Return current * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l; })
+
+#define cpu_relax() barrier()
+#define release_thread(thread) do {} while (0)
+#define prepare_to_copy(tsk) do {} while (0)
+
+/*
+ * User space process size: 2GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+#define TASK_SIZE 0x7fff8000UL
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE ((TASK_SIZE / 3) & ~(PAGE_SIZE))
+
+#ifdef __KERNEL__
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX TASK_SIZE
+#endif
+
+/*
+ * If you change thread_struct remember to change the #defines below too!
+ */
+struct thread_struct {
+ unsigned long reg0, reg2, reg3;
+ unsigned long reg12, reg13, reg14, reg15, reg16;
+ unsigned long reg17, reg18, reg19, reg20, reg21;
+
+ unsigned long cp0_psr;
+ unsigned long cp0_ema; /* Last user fault */
+ unsigned long cp0_badvaddr; /* Last user fault */
+ unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
+ unsigned long error_code;
+ unsigned long trap_no;
+
+ unsigned long mflags;
+ unsigned long reg29;
+
+ unsigned long single_step;
+ unsigned long ss_nextcnt;
+
+ unsigned long insn1_type;
+ unsigned long addr1;
+ unsigned long insn1;
+
+ unsigned long insn2_type;
+ unsigned long addr2;
+ unsigned long insn2;
+
+ mm_segment_t current_ds;
+};
+
+#define INIT_THREAD { \
+ .reg0 = 0, \
+ .reg2 = 0, \
+ .reg3 = 0, \
+ .reg12 = 0, \
+ .reg13 = 0, \
+ .reg14 = 0, \
+ .reg15 = 0, \
+ .reg16 = 0, \
+ .reg17 = 0, \
+ .reg18 = 0, \
+ .reg19 = 0, \
+ .reg20 = 0, \
+ .reg21 = 0, \
+ .cp0_psr = 0, \
+ .error_code = 0, \
+ .trap_no = 0, \
+}
+
+#define kstk_tos(tsk) \
+ ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
+#define task_pt_regs(tsk) ((struct pt_regs *)kstk_tos(tsk) - 1)
+
+#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
+#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
+
+#endif /* _ASM_SCORE_PROCESSOR_H */
diff --git a/arch/score/include/asm/thread_info.h b/arch/score/include/asm/thread_info.h
new file mode 100644
index 0000000..0af8ca0
--- /dev/null
+++ b/arch/score/include/asm/thread_info.h
@@ -0,0 +1,103 @@
+#ifndef _ASM_SCORE_THREAD_INFO_H
+#define _ASM_SCORE_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#define KU_MASK 0x08
+#define KU_USER 0x08
+#define KU_KERN 0x00
+
+#ifndef __ASSEMBLY__
+
+#include <asm/processor.h>
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants
+ * must also be changed
+ */
+struct thread_info {
+ struct task_struct *task; /* main task structure */
+ struct exec_domain *exec_domain; /* execution domain */
+ unsigned long flags; /* low level flags */
+ unsigned long tp_value; /* thread pointer */
+ __u32 cpu; /* current CPU */
+
+ /* 0 => preemptable, < 0 => BUG */
+ int preempt_count;
+
+ /*
+ * thread address space:
+ * 0-0xBFFFFFFF for user-thead
+ * 0-0xFFFFFFFF for kernel-thread
+ */
+ mm_segment_t addr_limit;
+ struct restart_block restart_block;
+ struct pt_regs *regs;
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .exec_domain = &default_exec_domain, \
+ .cpu = 0, \
+ .preempt_count = 1, \
+ .addr_limit = KERNEL_DS, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+}
+
+#define init_thread_info (init_thread_union.thread_info)
+#define init_stack (init_thread_union.stack)
+
+/* How to get the thread information struct from C. */
+register struct thread_info *__current_thread_info __asm__("r28");
+#define current_thread_info() __current_thread_info
+
+/* thread information allocation */
+#define THREAD_SIZE_ORDER (1)
+#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define THREAD_MASK (THREAD_SIZE - 1UL)
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#define free_thread_info(info) kfree(info)
+
+#endif /* !__ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE 0x10000000
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to
+ * access
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
+#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
+ TIF_NEED_RESCHED */
+#define TIF_MEMDIE 18
+
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
+#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
+#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
+
+#define _TIF_WORK_MASK (0x0000ffff)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_SCORE_THREAD_INFO_H */
diff --git a/arch/score/include/asm/topology.h b/arch/score/include/asm/topology.h
new file mode 100644
index 0000000..425fba3
--- /dev/null
+++ b/arch/score/include/asm/topology.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_SCORE_TOPOLOGY_H
+#define _ASM_SCORE_TOPOLOGY_H
+
+#include <asm-generic/topology.h>
+
+#endif /* _ASM_SCORE_TOPOLOGY_H */
--
1.6.2
--
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