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Date: Mon, 19 Mar 2012 11:18:45 +0000
From: David Howells <dhowells@...hat.com>
To: gxt@...c.pku.edu.cn
Cc: dhowells@...hat.com, paul.gortmaker@...driver.com,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
arnd@...db.de
Subject: Re: [PATCH 27/38] Disintegrate asm/system.h for Unicore32 [ver #3]
Guan Xueao <gxt@....edu.cn> wrote:
> The patch is a replacement for your patch, because I adjusted some codestyles
> at the meantime.
Your mail client broke your patch to some extent, though I'm not sure exactly
what. Here's an incremental diff that takes my patch to what I think yours
should have been. Is this correct?
David
---
diff --git a/arch/unicore32/include/asm/barrier.h b/arch/unicore32/include/asm/barrier.h
index b7e5f82..26a87b7 100644
--- a/arch/unicore32/include/asm/barrier.h
+++ b/arch/unicore32/include/asm/barrier.h
@@ -1,7 +1,7 @@
/*
* Memory barrier implementations for PKUnity SoC and UniCore ISA
*
- * Copyright (C) 2001-2010 GUAN Xue-tao
+ * Copyright (C) 2001-2012 GUAN Xue-tao
*
* 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
diff --git a/arch/unicore32/include/asm/bug.h b/arch/unicore32/include/asm/bug.h
index 8304b64..bddab00 100644
--- a/arch/unicore32/include/asm/bug.h
+++ b/arch/unicore32/include/asm/bug.h
@@ -1,7 +1,7 @@
/*
* Bug handling for PKUnity SoC and UniCore ISA
*
- * Copyright (C) 2001-2010 GUAN Xue-tao
+ * Copyright (C) 2001-2012 GUAN Xue-tao
*
* 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
@@ -10,20 +10,14 @@
#ifndef __UNICORE_BUG_H__
#define __UNICORE_BUG_H__
-#include <linux/linkage.h>
-#include <asm/bug.h>
+#include <asm-generic/bug.h>
struct pt_regs;
struct siginfo;
-void die(const char *msg, struct pt_regs *regs, int err);
-
-void uc32_notify_die(const char *str, struct pt_regs *regs,
- struct siginfo *info, unsigned long err, unsigned long trap);
-
-void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
- struct pt_regs *),
- int sig, int code, const char *name);
+extern void die(const char *msg, struct pt_regs *regs, int err);
+extern void uc32_notify_die(const char *str, struct pt_regs *regs,
+ struct siginfo *info, unsigned long err, unsigned long trap);
extern asmlinkage void __backtrace(void);
extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
diff --git a/arch/unicore32/include/asm/cmpxchg.h b/arch/unicore32/include/asm/cmpxchg.h
index 2c36450..0d68d2a 100644
--- a/arch/unicore32/include/asm/cmpxchg.h
+++ b/arch/unicore32/include/asm/cmpxchg.h
@@ -1,7 +1,7 @@
/*
- * Atomics for PKUnity SoC and UniCore ISA
+ * Atomic xchg/cmpxchg for PKUnity SoC and UniCore ISA
*
- * Copyright (C) 2001-2010 GUAN Xue-tao
+ * Copyright (C) 2001-2012 GUAN Xue-tao
*
* 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
@@ -10,36 +10,36 @@
#ifndef __UNICORE_CMPXCHG_H__
#define __UNICORE_CMPXCHG_H__
-static inline unsigned long
-__xchg(unsigned long x, volatile void *ptr, int size)
+static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
+ int size)
{
unsigned long ret;
switch (size) {
case 1:
- asm volatile("@ __xchg1\n"
- " swapb %0, %1, [%2]"
- : "=&r" (ret)
- : "r" (x), "r" (ptr)
- : "memory", "cc");
+ asm volatile("@ __xchg1\n"
+ " swapb %0, %1, [%2]"
+ : "=&r" (ret)
+ : "r" (x), "r" (ptr)
+ : "memory", "cc");
break;
case 4:
- asm volatile("@ __xchg4\n"
- " swapw %0, %1, [%2]"
- : "=&r" (ret)
- : "r" (x), "r" (ptr)
- : "memory", "cc");
+ asm volatile("@ __xchg4\n"
+ " swapw %0, %1, [%2]"
+ : "=&r" (ret)
+ : "r" (x), "r" (ptr)
+ : "memory", "cc");
break;
default:
panic("xchg: bad data size: ptr 0x%p, size %d\n",
- ptr, size);
+ ptr, size);
}
return ret;
}
#define xchg(ptr, x) \
- ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+ ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
#include <asm-generic/cmpxchg-local.h>
@@ -47,11 +47,11 @@ __xchg(unsigned long x, volatile void *ptr, int size)
* cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
* them available.
*/
-#define cmpxchg_local(ptr, o, n) \
- ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
- (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) \
- __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg_local(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
+ (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) \
+ __cmpxchg64_local_generic((ptr), (o), (n))
#include <asm-generic/cmpxchg.h>
diff --git a/arch/unicore32/include/asm/exec.h b/arch/unicore32/include/asm/exec.h
index ae707b3..989be7e 100644
--- a/arch/unicore32/include/asm/exec.h
+++ b/arch/unicore32/include/asm/exec.h
@@ -1,7 +1,7 @@
/*
* Process execution bits for PKUnity SoC and UniCore ISA
*
- * Copyright (C) 2001-2010 GUAN Xue-tao
+ * Copyright (C) 2001-2012 GUAN Xue-tao
*
* 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
diff --git a/arch/unicore32/include/asm/hwdef-copro.h b/arch/unicore32/include/asm/hwdef-copro.h
new file mode 100644
index 0000000..6285249
--- /dev/null
+++ b/arch/unicore32/include/asm/hwdef-copro.h
@@ -0,0 +1,49 @@
+/*
+ * Co-processor register definitions for PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2012 GUAN Xue-tao
+ *
+ * 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.
+ */
+#ifndef __UNICORE_HWDEF_COPRO_H__
+#define __UNICORE_HWDEF_COPRO_H__
+
+/*
+ * Control Register bits (CP#0 CR1)
+ */
+#define CR_M (1 << 0) /* MMU enable */
+#define CR_A (1 << 1) /* Alignment abort enable */
+#define CR_D (1 << 2) /* Dcache enable */
+#define CR_I (1 << 3) /* Icache enable */
+#define CR_B (1 << 4) /* Dcache write mechanism: write back */
+#define CR_T (1 << 5) /* Burst enable */
+#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
+
+#ifndef __ASSEMBLY__
+
+#define vectors_high() (cr_alignment & CR_V)
+
+extern unsigned long cr_no_alignment; /* defined in entry.S */
+extern unsigned long cr_alignment; /* defined in entry.S */
+
+static inline unsigned int get_cr(void)
+{
+ unsigned int val;
+ asm("movc %0, p0.c1, #0" : "=r" (val) : : "cc");
+ return val;
+}
+
+static inline void set_cr(unsigned int val)
+{
+ asm volatile("movc p0.c1, %0, #0 @set CR"
+ : : "r" (val) : "cc");
+ isb();
+}
+
+extern void adjust_cr(unsigned long mask, unsigned long set);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __UNICORE_HWDEF_COPRO_H__ */
diff --git a/arch/unicore32/include/asm/switch_to.h b/arch/unicore32/include/asm/switch_to.h
index db7a40c..dfa3175 100644
--- a/arch/unicore32/include/asm/switch_to.h
+++ b/arch/unicore32/include/asm/switch_to.h
@@ -1,7 +1,7 @@
/*
* Task switching for PKUnity SoC and UniCore ISA
*
- * Copyright (C) 2001-2010 GUAN Xue-tao
+ * Copyright (C) 2001-2012 GUAN Xue-tao
*
* 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
@@ -19,12 +19,12 @@ struct thread_info;
* contains the memory barrier to tell GCC not to cache `current'.
*/
extern struct task_struct *__switch_to(struct task_struct *,
- struct thread_info *, struct thread_info *);
+ struct thread_info *, struct thread_info *);
-#define switch_to(prev, next, last) \
-do { \
- last = __switch_to(prev, \
- task_thread_info(prev), task_thread_info(next)); \
-} while (0)
+#define switch_to(prev, next, last) \
+ do { \
+ last = __switch_to(prev, task_thread_info(prev), \
+ task_thread_info(next)); \
+ } while (0)
#endif /* __UNICORE_SWITCH_TO_H__ */
diff --git a/arch/unicore32/include/asm/system.h b/arch/unicore32/include/asm/system.h
index cfc1498..a7f4057 100644
--- a/arch/unicore32/include/asm/system.h
+++ b/arch/unicore32/include/asm/system.h
@@ -1,7 +1,5 @@
/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */
#include <asm/barrier.h>
#include <asm/cmpxchg.h>
-#include <asm/cr.h>
#include <asm/exec.h>
-#include <asm/setup.h>
#include <asm/switch_to.h>
diff --git a/arch/unicore32/kernel/head.S b/arch/unicore32/kernel/head.S
index fb1eb5c..e8f0b98 100644
--- a/arch/unicore32/kernel/head.S
+++ b/arch/unicore32/kernel/head.S
@@ -17,6 +17,7 @@
#include <generated/asm-offsets.h>
#include <asm/memory.h>
#include <asm/thread_info.h>
+#include <asm/hwdef-copro.h>
#include <asm/pgtable-hwdef.h>
#if (PHYS_OFFSET & 0x003fffff)
diff --git a/arch/unicore32/kernel/setup.h b/arch/unicore32/kernel/setup.h
index dcd1306..f239550 100644
--- a/arch/unicore32/kernel/setup.h
+++ b/arch/unicore32/kernel/setup.h
@@ -12,8 +12,11 @@
#ifndef __UNICORE_KERNEL_SETUP_H__
#define __UNICORE_KERNEL_SETUP_H__
+#include <asm/hwdef-copro.h>
+
extern void paging_init(void);
extern void puv3_core_init(void);
+extern void cpu_init(void);
extern void puv3_ps2_init(void);
extern void pci_puv3_preinit(void);
diff --git a/arch/unicore32/mm/alignment.c b/arch/unicore32/mm/alignment.c
index 28f576d..de7dc5f 100644
--- a/arch/unicore32/mm/alignment.c
+++ b/arch/unicore32/mm/alignment.c
@@ -24,6 +24,8 @@
#include <asm/tlbflush.h>
#include <asm/unaligned.h>
+#include "mm.h"
+
#define CODING_BITS(i) (i & 0xe0000120)
#define LDST_P_BIT(i) (i & (1 << 28)) /* Preindex */
diff --git a/arch/unicore32/mm/mm.h b/arch/unicore32/mm/mm.h
index 3296bca..3d2b524 100644
--- a/arch/unicore32/mm/mm.h
+++ b/arch/unicore32/mm/mm.h
@@ -9,6 +9,8 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <asm/hwdef-copro.h>
+
/* the upper-most page table pointer */
extern pmd_t *top_pmd;
extern int sysctl_overcommit_memory;
@@ -34,6 +36,9 @@ struct mem_type {
const struct mem_type *get_mem_type(unsigned int type);
extern void __flush_dcache_page(struct address_space *, struct page *);
+extern void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
+ struct pt_regs *),
+ int sig, int code, const char *name);
void __init bootmem_init(void);
void uc32_mm_memblock_reserve(void);
--
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