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authorLinus Torvalds <torvalds@linux-foundation.org>2010-04-01 12:14:20 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-01 12:14:20 -0400
commit445c682b93479c06d1b062b63ed79202f3ed5503 (patch)
treeb780cf9d9794f9efe0692ba214a4c11c27f0fe0d
parentc7681f4637df65082aeee1ea1ff0479607d71982 (diff)
parentca3865bae5ff86f5670edc9beebbd1f58c29de85 (diff)
Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (35 commits) microblaze: Support word copying in copy_tofrom_user microblaze: Print early printk information to log buffer microblaze: head.S typo fix microblaze: Use MICROBLAZE_TLB_SIZE in asm code microblaze: Kconfig Fix - pci microblaze: Adding likely macros microblaze: Add .type and .size to ASM functions microblaze: Fix TLB macros microblaze: Use instruction with delay slot microblaze: Remove additional resr and rear loading microblaze: Change register usage for ESR and EAR microblaze: Prepare work for optimization in exception code microblaze: Add DEBUG option microblaze: Support systems without lmb bram microblaze: uaccess: Sync strlen, strnlen, copy_to/from_user microblaze: uaccess: Unify __copy_tofrom_user microblaze: uaccess: Move functions to generic location microblaze: uaccess: Fix put_user for noMMU microblaze: uaccess: Fix get_user macro for noMMU microblaze: uaccess: fix clear_user for noMMU kernel ...
Diffstat
-rw-r--r--arch/microblaze/Kconfig3
-rw-r--r--arch/microblaze/Makefile4
-rw-r--r--arch/microblaze/boot/Makefile6
-rw-r--r--arch/microblaze/include/asm/processor.h1
-rw-r--r--arch/microblaze/include/asm/segment.h49
-rw-r--r--arch/microblaze/include/asm/thread_info.h5
-rw-r--r--arch/microblaze/include/asm/tlbflush.h3
-rw-r--r--arch/microblaze/include/asm/uaccess.h447
-rw-r--r--arch/microblaze/kernel/dma.c2
-rw-r--r--arch/microblaze/kernel/head.S12
-rw-r--r--arch/microblaze/kernel/hw_exception_handler.S112
-rw-r--r--arch/microblaze/kernel/misc.S15
-rw-r--r--arch/microblaze/kernel/process.c10
-rw-r--r--arch/microblaze/kernel/setup.c24
-rw-r--r--arch/microblaze/kernel/traps.c6
-rw-r--r--arch/microblaze/lib/Makefile3
-rw-r--r--arch/microblaze/lib/fastcopy.S6
-rw-r--r--arch/microblaze/lib/memcpy.c2
-rw-r--r--arch/microblaze/lib/memset.c15
-rw-r--r--arch/microblaze/lib/uaccess.c48
-rw-r--r--arch/microblaze/lib/uaccess_old.S45
-rw-r--r--arch/microblaze/mm/fault.c24
-rw-r--r--arch/microblaze/mm/init.c9
-rw-r--r--arch/microblaze/mm/pgtable.c2
24 files changed, 407 insertions, 446 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 203ec61c6d4c..76818f926539 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -75,9 +75,6 @@ config LOCKDEP_SUPPORT
75config HAVE_LATENCYTOP_SUPPORT 75config HAVE_LATENCYTOP_SUPPORT
76 def_bool y 76 def_bool y
77 77
78config PCI
79 def_bool n
80
81config DTC 78config DTC
82 def_bool y 79 def_bool y
83 80
diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
index 836832dd9b26..72f6e8583746 100644
--- a/arch/microblaze/Makefile
+++ b/arch/microblaze/Makefile
@@ -84,7 +84,7 @@ define archhelp
84 echo '* linux.bin - Create raw binary' 84 echo '* linux.bin - Create raw binary'
85 echo ' linux.bin.gz - Create compressed raw binary' 85 echo ' linux.bin.gz - Create compressed raw binary'
86 echo ' simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in' 86 echo ' simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
87 echo ' - stripped elf with fdt blob 87 echo ' - stripped elf with fdt blob'
88 echo ' simpleImage.<dt>.unstrip - full ELF image with fdt blob' 88 echo ' simpleImage.<dt>.unstrip - full ELF image with fdt blob'
89 echo ' *_defconfig - Select default config from arch/microblaze/configs' 89 echo ' *_defconfig - Select default config from arch/microblaze/configs'
90 echo '' 90 echo ''
@@ -94,3 +94,5 @@ define archhelp
94 echo ' name of a dts file from the arch/microblaze/boot/dts/ directory' 94 echo ' name of a dts file from the arch/microblaze/boot/dts/ directory'
95 echo ' (minus the .dts extension).' 95 echo ' (minus the .dts extension).'
96endef 96endef
97
98MRPROPER_FILES += $(boot)/simpleImage.*
diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile
index 902cf9846c3c..57f50c2371c6 100644
--- a/arch/microblaze/boot/Makefile
+++ b/arch/microblaze/boot/Makefile
@@ -23,8 +23,6 @@ $(obj)/system.dtb: $(obj)/$(DTB).dtb
23endif 23endif
24 24
25$(obj)/linux.bin: vmlinux FORCE 25$(obj)/linux.bin: vmlinux FORCE
26 [ -n $(CONFIG_INITRAMFS_SOURCE) ] && [ ! -e $(CONFIG_INITRAMFS_SOURCE) ] && \
27 touch $(CONFIG_INITRAMFS_SOURCE) || echo "No CPIO image"
28 $(call if_changed,objcopy) 26 $(call if_changed,objcopy)
29 $(call if_changed,uimage) 27 $(call if_changed,uimage)
30 @echo 'Kernel: $@ is ready' ' (#'`cat .version`')' 28 @echo 'Kernel: $@ is ready' ' (#'`cat .version`')'
@@ -62,6 +60,4 @@ quiet_cmd_dtc = DTC $@
62$(obj)/%.dtb: $(dtstree)/%.dts FORCE 60$(obj)/%.dtb: $(dtstree)/%.dts FORCE
63 $(call if_changed,dtc) 61 $(call if_changed,dtc)
64 62
65clean-kernel += linux.bin linux.bin.gz simpleImage.* 63clean-files += *.dtb simpleImage.*.unstrip linux.bin.ub
66
67clean-files += *.dtb simpleImage.*.unstrip
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 563c6b9453f0..8eeb09211ece 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -14,7 +14,6 @@
14#include <asm/ptrace.h> 14#include <asm/ptrace.h>
15#include <asm/setup.h> 15#include <asm/setup.h>
16#include <asm/registers.h> 16#include <asm/registers.h>
17#include <asm/segment.h>
18#include <asm/entry.h> 17#include <asm/entry.h>
19#include <asm/current.h> 18#include <asm/current.h>
20 19
diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h
deleted file mode 100644
index 0e7102c3fb11..000000000000
--- a/arch/microblaze/include/asm/segment.h
+++ /dev/null
@@ -1,49 +0,0 @@
1/*
2 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2008-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#ifndef _ASM_MICROBLAZE_SEGMENT_H
12#define _ASM_MICROBLAZE_SEGMENT_H
13
14# ifndef __ASSEMBLY__
15
16typedef struct {
17 unsigned long seg;
18} mm_segment_t;
19
20/*
21 * On Microblaze the fs value is actually the top of the corresponding
22 * address space.
23 *
24 * The fs value determines whether argument validity checking should be
25 * performed or not. If get_fs() == USER_DS, checking is performed, with
26 * get_fs() == KERNEL_DS, checking is bypassed.
27 *
28 * For historical reasons, these macros are grossly misnamed.
29 *
30 * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
31 */
32# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
33
34# ifndef CONFIG_MMU
35# define KERNEL_DS MAKE_MM_SEG(0)
36# define USER_DS KERNEL_DS
37# else
38# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
39# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
40# endif
41
42# define get_ds() (KERNEL_DS)
43# define get_fs() (current_thread_info()->addr_limit)
44# define set_fs(val) (current_thread_info()->addr_limit = (val))
45
46# define segment_eq(a, b) ((a).seg == (b).seg)
47
48# endif /* __ASSEMBLY__ */
49#endif /* _ASM_MICROBLAZE_SEGMENT_H */
diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index 6e92885d381a..b2ca80f64640 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -19,7 +19,6 @@
19#ifndef __ASSEMBLY__ 19#ifndef __ASSEMBLY__
20# include <linux/types.h> 20# include <linux/types.h>
21# include <asm/processor.h> 21# include <asm/processor.h>
22# include <asm/segment.h>
23 22
24/* 23/*
25 * low level task data that entry.S needs immediate access to 24 * low level task data that entry.S needs immediate access to
@@ -60,6 +59,10 @@ struct cpu_context {
60 __u32 fsr; 59 __u32 fsr;
61}; 60};
62 61
62typedef struct {
63 unsigned long seg;
64} mm_segment_t;
65
63struct thread_info { 66struct thread_info {
64 struct task_struct *task; /* main task structure */ 67 struct task_struct *task; /* main task structure */
65 struct exec_domain *exec_domain; /* execution domain */ 68 struct exec_domain *exec_domain; /* execution domain */
diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h
index bcb8b41d55af..2e1353c2d18d 100644
--- a/arch/microblaze/include/asm/tlbflush.h
+++ b/arch/microblaze/include/asm/tlbflush.h
@@ -24,6 +24,7 @@ extern void _tlbie(unsigned long address);
24extern void _tlbia(void); 24extern void _tlbia(void);
25 25
26#define __tlbia() { preempt_disable(); _tlbia(); preempt_enable(); } 26#define __tlbia() { preempt_disable(); _tlbia(); preempt_enable(); }
27#define __tlbie(x) { _tlbie(x); }
27 28
28static inline void local_flush_tlb_all(void) 29static inline void local_flush_tlb_all(void)
29 { __tlbia(); } 30 { __tlbia(); }
@@ -31,7 +32,7 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
31 { __tlbia(); } 32 { __tlbia(); }
32static inline void local_flush_tlb_page(struct vm_area_struct *vma, 33static inline void local_flush_tlb_page(struct vm_area_struct *vma,
33 unsigned long vmaddr) 34 unsigned long vmaddr)
34 { _tlbie(vmaddr); } 35 { __tlbie(vmaddr); }
35static inline void local_flush_tlb_range(struct vm_area_struct *vma, 36static inline void local_flush_tlb_range(struct vm_area_struct *vma,
36 unsigned long start, unsigned long end) 37 unsigned long start, unsigned long end)
37 { __tlbia(); } 38 { __tlbia(); }
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 371bd6e56d9a..446bec29b142 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -22,101 +22,73 @@
22#include <asm/mmu.h> 22#include <asm/mmu.h>
23#include <asm/page.h> 23#include <asm/page.h>
24#include <asm/pgtable.h> 24#include <asm/pgtable.h>
25#include <asm/segment.h>
26#include <linux/string.h> 25#include <linux/string.h>
27 26
28#define VERIFY_READ 0 27#define VERIFY_READ 0
29#define VERIFY_WRITE 1 28#define VERIFY_WRITE 1
30 29
31#define __clear_user(addr, n) (memset((void *)(addr), 0, (n)), 0) 30/*
32 31 * On Microblaze the fs value is actually the top of the corresponding
33#ifndef CONFIG_MMU 32 * address space.
34 33 *
35extern int ___range_ok(unsigned long addr, unsigned long size); 34 * The fs value determines whether argument validity checking should be
36 35 * performed or not. If get_fs() == USER_DS, checking is performed, with
37#define __range_ok(addr, size) \ 36 * get_fs() == KERNEL_DS, checking is bypassed.
38 ___range_ok((unsigned long)(addr), (unsigned long)(size)) 37 *
39 38 * For historical reasons, these macros are grossly misnamed.
40#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0) 39 *
41#define __access_ok(add, size) (__range_ok((addr), (size)) == 0) 40 * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
42 41 */
43/* Undefined function to trigger linker error */ 42# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
44extern int bad_user_access_length(void);
45
46/* FIXME this is function for optimalization -> memcpy */
47#define __get_user(var, ptr) \
48({ \
49 int __gu_err = 0; \
50 switch (sizeof(*(ptr))) { \
51 case 1: \
52 case 2: \
53 case 4: \
54 (var) = *(ptr); \
55 break; \
56 case 8: \
57 memcpy((void *) &(var), (ptr), 8); \
58 break; \
59 default: \
60 (var) = 0; \
61 __gu_err = __get_user_bad(); \
62 break; \
63 } \
64 __gu_err; \
65})
66 43
67#define __get_user_bad() (bad_user_access_length(), (-EFAULT)) 44# ifndef CONFIG_MMU
45# define KERNEL_DS MAKE_MM_SEG(0)
46# define USER_DS KERNEL_DS
47# else
48# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
49# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
50# endif
68 51
69/* FIXME is not there defined __pu_val */ 52# define get_ds() (KERNEL_DS)
70#define __put_user(var, ptr) \ 53# define get_fs() (current_thread_info()->addr_limit)
71({ \ 54# define set_fs(val) (current_thread_info()->addr_limit = (val))
72 int __pu_err = 0; \
73 switch (sizeof(*(ptr))) { \
74 case 1: \
75 case 2: \
76 case 4: \
77 *(ptr) = (var); \
78 break; \
79 case 8: { \
80 typeof(*(ptr)) __pu_val = (var); \
81 memcpy(ptr, &__pu_val, sizeof(__pu_val)); \
82 } \
83 break; \
84 default: \
85 __pu_err = __put_user_bad(); \
86 break; \
87 } \
88 __pu_err; \
89})
90 55
91#define __put_user_bad() (bad_user_access_length(), (-EFAULT)) 56# define segment_eq(a, b) ((a).seg == (b).seg)
92 57
93#define put_user(x, ptr) __put_user((x), (ptr)) 58/*
94#define get_user(x, ptr) __get_user((x), (ptr)) 59 * The exception table consists of pairs of addresses: the first is the
60 * address of an instruction that is allowed to fault, and the second is
61 * the address at which the program should continue. No registers are
62 * modified, so it is entirely up to the continuation code to figure out
63 * what to do.
64 *
65 * All the routines below use bits of fixup code that are out of line
66 * with the main instruction path. This means when everything is well,
67 * we don't even have to jump over them. Further, they do not intrude
68 * on our cache or tlb entries.
69 */
70struct exception_table_entry {
71 unsigned long insn, fixup;
72};
95 73
96#define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0) 74/* Returns 0 if exception not found and fixup otherwise. */
97#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0) 75extern unsigned long search_exception_table(unsigned long);
98 76
99#define __copy_to_user(to, from, n) (copy_to_user((to), (from), (n))) 77#ifndef CONFIG_MMU
100#define __copy_from_user(to, from, n) (copy_from_user((to), (from), (n)))
101#define __copy_to_user_inatomic(to, from, n) \
102 (__copy_to_user((to), (from), (n)))
103#define __copy_from_user_inatomic(to, from, n) \
104 (__copy_from_user((to), (from), (n)))
105 78
106static inline unsigned long clear_user(void *addr, unsigned long size) 79/* Check against bounds of physical memory */
80static inline int ___range_ok(unsigned long addr, unsigned long size)
107{ 81{
108 if (access_ok(VERIFY_WRITE, addr, size)) 82 return ((addr < memory_start) ||
109 size = __clear_user(addr, size); 83 ((addr + size) > memory_end));
110 return size;
111} 84}
112 85
113/* Returns 0 if exception not found and fixup otherwise. */ 86#define __range_ok(addr, size) \
114extern unsigned long search_exception_table(unsigned long); 87 ___range_ok((unsigned long)(addr), (unsigned long)(size))
115 88
116extern long strncpy_from_user(char *dst, const char *src, long count); 89#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
117extern long strnlen_user(const char *src, long count);
118 90
119#else /* CONFIG_MMU */ 91#else
120 92
121/* 93/*
122 * Address is valid if: 94 * Address is valid if:
@@ -129,24 +101,88 @@ extern long strnlen_user(const char *src, long count);
129/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n", 101/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n",
130 type?"WRITE":"READ",addr,size,get_fs().seg)) */ 102 type?"WRITE":"READ",addr,size,get_fs().seg)) */
131 103
132/* 104#endif
133 * All the __XXX versions macros/functions below do not perform
134 * access checking. It is assumed that the necessary checks have been
135 * already performed before the finction (macro) is called.
136 */
137 105
138#define get_user(x, ptr) \ 106#ifdef CONFIG_MMU
139({ \ 107# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
140 access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \ 108# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
141 ? __get_user((x), (ptr)) : -EFAULT; \ 109#else
142}) 110# define __FIXUP_SECTION ".section .discard,\"ax\"\n"
111# define __EX_TABLE_SECTION ".section .discard,\"a\"\n"
112#endif
143 113
144#define put_user(x, ptr) \ 114extern unsigned long __copy_tofrom_user(void __user *to,
145({ \ 115 const void __user *from, unsigned long size);
146 access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \ 116
147 ? __put_user((x), (ptr)) : -EFAULT; \ 117/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */
118static inline unsigned long __must_check __clear_user(void __user *to,
119 unsigned long n)
120{
121 /* normal memset with two words to __ex_table */
122 __asm__ __volatile__ ( \
123 "1: sb r0, %2, r0;" \
124 " addik %0, %0, -1;" \
125 " bneid %0, 1b;" \
126 " addik %2, %2, 1;" \
127 "2: " \
128 __EX_TABLE_SECTION \
129 ".word 1b,2b;" \
130 ".previous;" \
131 : "=r"(n) \
132 : "0"(n), "r"(to)
133 );
134 return n;
135}
136
137static inline unsigned long __must_check clear_user(void __user *to,
138 unsigned long n)
139{
140 might_sleep();
141 if (unlikely(!access_ok(VERIFY_WRITE, to, n)))
142 return n;
143
144 return __clear_user(to, n);
145}
146
147/* put_user and get_user macros */
148extern long __user_bad(void);
149
150#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
151({ \
152 __asm__ __volatile__ ( \
153 "1:" insn " %1, %2, r0;" \
154 " addk %0, r0, r0;" \
155 "2: " \
156 __FIXUP_SECTION \
157 "3: brid 2b;" \
158 " addik %0, r0, %3;" \
159 ".previous;" \
160 __EX_TABLE_SECTION \
161 ".word 1b,3b;" \
162 ".previous;" \
163 : "=&r"(__gu_err), "=r"(__gu_val) \
164 : "r"(__gu_ptr), "i"(-EFAULT) \
165 ); \
148}) 166})
149 167
168/**
169 * get_user: - Get a simple variable from user space.
170 * @x: Variable to store result.
171 * @ptr: Source address, in user space.
172 *
173 * Context: User context only. This function may sleep.
174 *
175 * This macro copies a single simple variable from user space to kernel
176 * space. It supports simple types like char and int, but not larger
177 * data types like structures or arrays.
178 *
179 * @ptr must have pointer-to-simple-variable type, and the result of
180 * dereferencing @ptr must be assignable to @x without a cast.
181 *
182 * Returns zero on success, or -EFAULT on error.
183 * On error, the variable @x is set to zero.
184 */
185
150#define __get_user(x, ptr) \ 186#define __get_user(x, ptr) \
151({ \ 187({ \
152 unsigned long __gu_val; \ 188 unsigned long __gu_val; \
@@ -163,30 +199,74 @@ extern long strnlen_user(const char *src, long count);
163 __get_user_asm("lw", (ptr), __gu_val, __gu_err); \ 199 __get_user_asm("lw", (ptr), __gu_val, __gu_err); \
164 break; \ 200 break; \
165 default: \ 201 default: \
166 __gu_val = 0; __gu_err = -EINVAL; \ 202 /* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
167 } \ 203 } \
168 x = (__typeof__(*(ptr))) __gu_val; \ 204 x = (__typeof__(*(ptr))) __gu_val; \
169 __gu_err; \ 205 __gu_err; \
170}) 206})
171 207
172#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ 208
209#define get_user(x, ptr) \
173({ \ 210({ \
174 __asm__ __volatile__ ( \ 211 access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
175 "1:" insn " %1, %2, r0; \ 212 ? __get_user((x), (ptr)) : -EFAULT; \
176 addk %0, r0, r0; \ 213})
177 2: \ 214
178 .section .fixup,\"ax\"; \ 215#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
179 3: brid 2b; \ 216({ \
180 addik %0, r0, %3; \ 217 __asm__ __volatile__ ( \
181 .previous; \ 218 "1:" insn " %1, %2, r0;" \
182 .section __ex_table,\"a\"; \ 219 " addk %0, r0, r0;" \
183 .word 1b,3b; \ 220 "2: " \
184 .previous;" \ 221 __FIXUP_SECTION \
185 : "=r"(__gu_err), "=r"(__gu_val) \ 222 "3: brid 2b;" \
186 : "r"(__gu_ptr), "i"(-EFAULT) \ 223 " addik %0, r0, %3;" \
187 ); \ 224 ".previous;" \
225 __EX_TABLE_SECTION \
226 ".word 1b,3b;" \
227 ".previous;" \
228 : "=&r"(__gu_err) \
229 : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
230 ); \
188}) 231})
189 232
233#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
234({ \
235 __asm__ __volatile__ (" lwi %0, %1, 0;" \
236 "1: swi %0, %2, 0;" \
237 " lwi %0, %1, 4;" \
238 "2: swi %0, %2, 4;" \
239 " addk %0, r0, r0;" \
240 "3: " \
241 __FIXUP_SECTION \
242 "4: brid 3b;" \
243 " addik %0, r0, %3;" \
244 ".previous;" \
245 __EX_TABLE_SECTION \
246 ".word 1b,4b,2b,4b;" \
247 ".previous;" \
248 : "=&r"(__gu_err) \
249 : "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
250 ); \
251})
252
253/**
254 * put_user: - Write a simple value into user space.
255 * @x: Value to copy to user space.
256 * @ptr: Destination address, in user space.
257 *
258 * Context: User context only. This function may sleep.
259 *
260 * This macro copies a single simple value from kernel space to user
261 * space. It supports simple types like char and int, but not larger
262 * data types like structures or arrays.
263 *
264 * @ptr must have pointer-to-simple-variable type, and @x must be assignable
265 * to the result of dereferencing @ptr.
266 *
267 * Returns zero on success, or -EFAULT on error.
268 */
269
190#define __put_user(x, ptr) \ 270#define __put_user(x, ptr) \
191({ \ 271({ \
192 __typeof__(*(ptr)) volatile __gu_val = (x); \ 272 __typeof__(*(ptr)) volatile __gu_val = (x); \
@@ -195,7 +275,7 @@ extern long strnlen_user(const char *src, long count);
195 case 1: \ 275 case 1: \
196 __put_user_asm("sb", (ptr), __gu_val, __gu_err); \ 276 __put_user_asm("sb", (ptr), __gu_val, __gu_err); \
197 break; \ 277 break; \
198 case 2: \ 278 case 2: \
199 __put_user_asm("sh", (ptr), __gu_val, __gu_err); \ 279 __put_user_asm("sh", (ptr), __gu_val, __gu_err); \
200 break; \ 280 break; \
201 case 4: \ 281 case 4: \
@@ -205,121 +285,82 @@ extern long strnlen_user(const char *src, long count);
205 __put_user_asm_8((ptr), __gu_val, __gu_err); \ 285 __put_user_asm_8((ptr), __gu_val, __gu_err); \
206 break; \ 286 break; \
207 default: \ 287 default: \
208 __gu_err = -EINVAL; \ 288 /*__gu_err = -EINVAL;*/ __gu_err = __user_bad(); \
209 } \ 289 } \
210 __gu_err; \ 290 __gu_err; \
211}) 291})
212 292
213#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \ 293#ifndef CONFIG_MMU
214({ \
215__asm__ __volatile__ (" lwi %0, %1, 0; \
216 1: swi %0, %2, 0; \
217 lwi %0, %1, 4; \
218 2: swi %0, %2, 4; \
219 addk %0,r0,r0; \
220 3: \
221 .section .fixup,\"ax\"; \
222 4: brid 3b; \
223 addik %0, r0, %3; \
224 .previous; \
225 .section __ex_table,\"a\"; \
226 .word 1b,4b,2b,4b; \
227 .previous;" \
228 : "=&r"(__gu_err) \
229 : "r"(&__gu_val), \
230 "r"(__gu_ptr), "i"(-EFAULT) \
231 ); \
232})
233 294
234#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ 295#define put_user(x, ptr) __put_user((x), (ptr))
235({ \
236 __asm__ __volatile__ ( \
237 "1:" insn " %1, %2, r0; \
238 addk %0, r0, r0; \
239 2: \
240 .section .fixup,\"ax\"; \
241 3: brid 2b; \
242 addik %0, r0, %3; \
243 .previous; \
244 .section __ex_table,\"a\"; \
245 .word 1b,3b; \
246 .previous;" \
247 : "=r"(__gu_err) \
248 : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
249 ); \
250})
251 296
252/* 297#else /* CONFIG_MMU */
253 * Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail.
254 */
255static inline int clear_user(char *to, int size)
256{
257 if (size && access_ok(VERIFY_WRITE, to, size)) {
258 __asm__ __volatile__ (" \
259 1: \
260 sb r0, %2, r0; \
261 addik %0, %0, -1; \
262 bneid %0, 1b; \
263 addik %2, %2, 1; \
264 2: \
265 .section __ex_table,\"a\"; \
266 .word 1b,2b; \
267 .section .text;" \
268 : "=r"(size) \
269 : "0"(size), "r"(to)
270 );
271 }
272 return size;
273}
274 298
275#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n)) 299#define put_user(x, ptr) \
300({ \
301 access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
302 ? __put_user((x), (ptr)) : -EFAULT; \
303})
304#endif /* CONFIG_MMU */
305
306/* copy_to_from_user */
307#define __copy_from_user(to, from, n) \
308 __copy_tofrom_user((__force void __user *)(to), \
309 (void __user *)(from), (n))
276#define __copy_from_user_inatomic(to, from, n) \ 310#define __copy_from_user_inatomic(to, from, n) \
277 copy_from_user((to), (from), (n)) 311 copy_from_user((to), (from), (n))
278 312
279#define copy_to_user(to, from, n) \ 313static inline long copy_from_user(void *to,
280 (access_ok(VERIFY_WRITE, (to), (n)) ? \ 314 const void __user *from, unsigned long n)
281 __copy_tofrom_user((void __user *)(to), \ 315{
282 (__force const void __user *)(from), (n)) \ 316 might_sleep();
283 : -EFAULT) 317 if (access_ok(VERIFY_READ, from, n))
318 return __copy_from_user(to, from, n);
319 return n;
320}
284 321
285#define __copy_to_user(to, from, n) copy_to_user((to), (from), (n)) 322#define __copy_to_user(to, from, n) \
323 __copy_tofrom_user((void __user *)(to), \
324 (__force const void __user *)(from), (n))
286#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n)) 325#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n))
287 326
288#define copy_from_user(to, from, n) \ 327static inline long copy_to_user(void __user *to,
289 (access_ok(VERIFY_READ, (from), (n)) ? \ 328 const void *from, unsigned long n)
290 __copy_tofrom_user((__force void __user *)(to), \ 329{
291 (void __user *)(from), (n)) \ 330 might_sleep();
292 : -EFAULT) 331 if (access_ok(VERIFY_WRITE, to, n))
332 return __copy_to_user(to, from, n);
333 return n;
334}
293 335
336/*
337 * Copy a null terminated string from userspace.
338 */
294extern int __strncpy_user(char *to, const char __user *from, int len); 339extern int __strncpy_user(char *to, const char __user *from, int len);
295extern int __strnlen_user(const char __user *sstr, int len);
296 340
297#define strncpy_from_user(to, from, len) \ 341#define __strncpy_from_user __strncpy_user
298 (access_ok(VERIFY_READ, from, 1) ? \
299 __strncpy_user(to, from, len) : -EFAULT)
300#define strnlen_user(str, len) \
301 (access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)
302 342
303#endif /* CONFIG_MMU */ 343static inline long
304 344strncpy_from_user(char *dst, const char __user *src, long count)
305extern unsigned long __copy_tofrom_user(void __user *to, 345{
306 const void __user *from, unsigned long size); 346 if (!access_ok(VERIFY_READ, src, 1))
347 return -EFAULT;
348 return __strncpy_from_user(dst, src, count);
349}
307 350
308/* 351/*
309 * The exception table consists of pairs of addresses: the first is the 352 * Return the size of a string (including the ending 0)
310 * address of an instruction that is allowed to fault, and the second is
311 * the address at which the program should continue. No registers are
312 * modified, so it is entirely up to the continuation code to figure out
313 * what to do.
314 * 353 *
315 * All the routines below use bits of fixup code that are out of line 354 * Return 0 on exception, a value greater than N if too long
316 * with the main instruction path. This means when everything is well,
317 * we don't even have to jump over them. Further, they do not intrude
318 * on our cache or tlb entries.
319 */ 355 */
320struct exception_table_entry { 356extern int __strnlen_user(const char __user *sstr, int len);
321 unsigned long insn, fixup; 357
322}; 358static inline long strnlen_user(const char __user *src, long n)
359{
360 if (!access_ok(VERIFY_READ, src, 1))
361 return 0;
362 return __strnlen_user(src, n);
363}
323 364
324#endif /* __ASSEMBLY__ */ 365#endif /* __ASSEMBLY__ */
325#endif /* __KERNEL__ */ 366#endif /* __KERNEL__ */
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index b1084974fccd..4d5b0311601b 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -37,7 +37,7 @@ static inline void __dma_sync_page(unsigned long paddr, unsigned long offset,
37 37
38static unsigned long get_dma_direct_offset(struct device *dev) 38static unsigned long get_dma_direct_offset(struct device *dev)
39{ 39{
40 if (dev) 40 if (likely(dev))
41 return (unsigned long)dev->archdata.dma_data; 41 return (unsigned long)dev->archdata.dma_data;
42 42
43 return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */ 43 return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index cb7815cfe5ab..da6a5f5dc766 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -51,6 +51,12 @@ swapper_pg_dir:
51 51
52 .text 52 .text
53ENTRY(_start) 53ENTRY(_start)
54#if CONFIG_KERNEL_BASE_ADDR == 0
55 brai TOPHYS(real_start)
56 .org 0x100
57real_start:
58#endif
59
54 mfs r1, rmsr 60 mfs r1, rmsr
55 andi r1, r1, ~2 61 andi r1, r1, ~2
56 mts rmsr, r1 62 mts rmsr, r1
@@ -99,8 +105,8 @@ no_fdt_arg:
99 tophys(r4,r4) /* convert to phys address */ 105 tophys(r4,r4) /* convert to phys address */
100 ori r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */ 106 ori r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */
101_copy_command_line: 107_copy_command_line:
102 lbu r2, r5, r6 /* r7=r5+r6 - r5 contain pointer to command line */ 108 lbu r2, r5, r6 /* r2=r5+r6 - r5 contain pointer to command line */
103 sb r2, r4, r6 /* addr[r4+r6]= r7*/ 109 sb r2, r4, r6 /* addr[r4+r6]= r2*/
104 addik r6, r6, 1 /* increment counting */ 110 addik r6, r6, 1 /* increment counting */
105 bgtid r3, _copy_command_line /* loop for all entries */ 111 bgtid r3, _copy_command_line /* loop for all entries */
106 addik r3, r3, -1 /* descrement loop */ 112 addik r3, r3, -1 /* descrement loop */
@@ -128,7 +134,7 @@ _copy_bram:
128 * virtual to physical. 134 * virtual to physical.
129 */ 135 */
130 nop 136 nop
131 addik r3, r0, 63 /* Invalidate all TLB entries */ 137 addik r3, r0, MICROBLAZE_TLB_SIZE -1 /* Invalidate all TLB entries */
132_invalidate: 138_invalidate:
133 mts rtlbx, r3 139 mts rtlbx, r3
134 mts rtlbhi, r0 /* flush: ensure V is clear */ 140 mts rtlbhi, r0 /* flush: ensure V is clear */
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 2b86c03aa841..995a2123635b 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -313,13 +313,13 @@ _hw_exception_handler:
313 mfs r5, rmsr; 313 mfs r5, rmsr;
314 nop 314 nop
315 swi r5, r1, 0; 315 swi r5, r1, 0;
316 mfs r3, resr 316 mfs r4, resr
317 nop 317 nop
318 mfs r4, rear; 318 mfs r3, rear;
319 nop 319 nop
320 320
321#ifndef CONFIG_MMU 321#ifndef CONFIG_MMU
322 andi r5, r3, 0x1000; /* Check ESR[DS] */ 322 andi r5, r4, 0x1000; /* Check ESR[DS] */
323 beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */ 323 beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */
324 mfs r17, rbtr; /* ESR[DS] set - return address in BTR */ 324 mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
325 nop 325 nop
@@ -327,13 +327,14 @@ not_in_delay_slot:
327 swi r17, r1, PT_R17 327 swi r17, r1, PT_R17
328#endif 328#endif
329 329
330 andi r5, r3, 0x1F; /* Extract ESR[EXC] */ 330 andi r5, r4, 0x1F; /* Extract ESR[EXC] */
331 331
332#ifdef CONFIG_MMU 332#ifdef CONFIG_MMU
333 /* Calculate exception vector offset = r5 << 2 */ 333 /* Calculate exception vector offset = r5 << 2 */
334 addk r6, r5, r5; /* << 1 */ 334 addk r6, r5, r5; /* << 1 */
335 addk r6, r6, r6; /* << 2 */ 335 addk r6, r6, r6; /* << 2 */
336 336
337#ifdef DEBUG
337/* counting which exception happen */ 338/* counting which exception happen */
338 lwi r5, r0, 0x200 + TOPHYS(r0_ram) 339 lwi r5, r0, 0x200 + TOPHYS(r0_ram)
339 addi r5, r5, 1 340 addi r5, r5, 1
@@ -341,6 +342,7 @@ not_in_delay_slot:
341 lwi r5, r6, 0x200 + TOPHYS(r0_ram) 342 lwi r5, r6, 0x200 + TOPHYS(r0_ram)
342 addi r5, r5, 1 343 addi r5, r5, 1
343 swi r5, r6, 0x200 + TOPHYS(r0_ram) 344 swi r5, r6, 0x200 + TOPHYS(r0_ram)
345#endif
344/* end */ 346/* end */
345 /* Load the HW Exception vector */ 347 /* Load the HW Exception vector */
346 lwi r6, r6, TOPHYS(_MB_HW_ExceptionVectorTable) 348 lwi r6, r6, TOPHYS(_MB_HW_ExceptionVectorTable)
@@ -376,7 +378,7 @@ handle_other_ex: /* Handle Other exceptions here */
376 swi r18, r1, PT_R18 378 swi r18, r1, PT_R18
377 379
378 or r5, r1, r0 380 or r5, r1, r0
379 andi r6, r3, 0x1F; /* Load ESR[EC] */ 381 andi r6, r4, 0x1F; /* Load ESR[EC] */
380 lwi r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */ 382 lwi r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */
381 swi r7, r1, PT_MODE 383 swi r7, r1, PT_MODE
382 mfs r7, rfsr 384 mfs r7, rfsr
@@ -426,11 +428,11 @@ handle_other_ex: /* Handle Other exceptions here */
426 */ 428 */
427handle_unaligned_ex: 429handle_unaligned_ex:
428 /* Working registers already saved: R3, R4, R5, R6 430 /* Working registers already saved: R3, R4, R5, R6
429 * R3 = ESR 431 * R4 = ESR
430 * R4 = EAR 432 * R3 = EAR
431 */ 433 */
432#ifdef CONFIG_MMU 434#ifdef CONFIG_MMU
433 andi r6, r3, 0x1000 /* Check ESR[DS] */ 435 andi r6, r4, 0x1000 /* Check ESR[DS] */
434 beqi r6, _no_delayslot /* Branch if ESR[DS] not set */ 436 beqi r6, _no_delayslot /* Branch if ESR[DS] not set */
435 mfs r17, rbtr; /* ESR[DS] set - return address in BTR */ 437 mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
436 nop 438 nop
@@ -439,7 +441,7 @@ _no_delayslot:
439 RESTORE_STATE; 441 RESTORE_STATE;
440 bri unaligned_data_trap 442 bri unaligned_data_trap
441#endif 443#endif
442 andi r6, r3, 0x3E0; /* Mask and extract the register operand */ 444 andi r6, r4, 0x3E0; /* Mask and extract the register operand */
443 srl r6, r6; /* r6 >> 5 */ 445 srl r6, r6; /* r6 >> 5 */
444 srl r6, r6; 446 srl r6, r6;
445 srl r6, r6; 447 srl r6, r6;
@@ -448,33 +450,33 @@ _no_delayslot:
448 /* Store the register operand in a temporary location */ 450 /* Store the register operand in a temporary location */
449 sbi r6, r0, TOPHYS(ex_reg_op); 451 sbi r6, r0, TOPHYS(ex_reg_op);
450 452
451 andi r6, r3, 0x400; /* Extract ESR[S] */ 453 andi r6, r4, 0x400; /* Extract ESR[S] */
452 bnei r6, ex_sw; 454 bnei r6, ex_sw;
453ex_lw: 455ex_lw:
454 andi r6, r3, 0x800; /* Extract ESR[W] */ 456 andi r6, r4, 0x800; /* Extract ESR[W] */
455 beqi r6, ex_lhw; 457 beqi r6, ex_lhw;
456 lbui r5, r4, 0; /* Exception address in r4 */ 458 lbui r5, r3, 0; /* Exception address in r3 */
457 /* Load a word, byte-by-byte from destination address 459 /* Load a word, byte-by-byte from destination address
458 and save it in tmp space */ 460 and save it in tmp space */
459 sbi r5, r0, TOPHYS(ex_tmp_data_loc_0); 461 sbi r5, r0, TOPHYS(ex_tmp_data_loc_0);
460 lbui r5, r4, 1; 462 lbui r5, r3, 1;
461 sbi r5, r0, TOPHYS(ex_tmp_data_loc_1); 463 sbi r5, r0, TOPHYS(ex_tmp_data_loc_1);
462 lbui r5, r4, 2; 464 lbui r5, r3, 2;
463 sbi r5, r0, TOPHYS(ex_tmp_data_loc_2); 465 sbi r5, r0, TOPHYS(ex_tmp_data_loc_2);
464 lbui r5, r4, 3; 466 lbui r5, r3, 3;
465 sbi r5, r0, TOPHYS(ex_tmp_data_loc_3); 467 sbi r5, r0, TOPHYS(ex_tmp_data_loc_3);
466 /* Get the destination register value into r3 */ 468 /* Get the destination register value into r4 */
467 lwi r3, r0, TOPHYS(ex_tmp_data_loc_0); 469 lwi r4, r0, TOPHYS(ex_tmp_data_loc_0);
468 bri ex_lw_tail; 470 bri ex_lw_tail;
469ex_lhw: 471ex_lhw:
470 lbui r5, r4, 0; /* Exception address in r4 */ 472 lbui r5, r3, 0; /* Exception address in r3 */
471 /* Load a half-word, byte-by-byte from destination 473 /* Load a half-word, byte-by-byte from destination
472 address and save it in tmp space */ 474 address and save it in tmp space */
473 sbi r5, r0, TOPHYS(ex_tmp_data_loc_0); 475 sbi r5, r0, TOPHYS(ex_tmp_data_loc_0);
474 lbui r5, r4, 1; 476 lbui r5, r3, 1;
475 sbi r5, r0, TOPHYS(ex_tmp_data_loc_1); 477 sbi r5, r0, TOPHYS(ex_tmp_data_loc_1);
476 /* Get the destination register value into r3 */ 478 /* Get the destination register value into r4 */
477 lhui r3, r0, TOPHYS(ex_tmp_data_loc_0); 479 lhui r4, r0, TOPHYS(ex_tmp_data_loc_0);
478ex_lw_tail: 480ex_lw_tail:
479 /* Get the destination register number into r5 */ 481 /* Get the destination register number into r5 */
480 lbui r5, r0, TOPHYS(ex_reg_op); 482 lbui r5, r0, TOPHYS(ex_reg_op);
@@ -502,25 +504,25 @@ ex_sw_tail:
502 andi r6, r6, 0x800; /* Extract ESR[W] */ 504 andi r6, r6, 0x800; /* Extract ESR[W] */
503 beqi r6, ex_shw; 505 beqi r6, ex_shw;
504 /* Get the word - delay slot */ 506 /* Get the word - delay slot */
505 swi r3, r0, TOPHYS(ex_tmp_data_loc_0); 507 swi r4, r0, TOPHYS(ex_tmp_data_loc_0);
506 /* Store the word, byte-by-byte into destination address */ 508 /* Store the word, byte-by-byte into destination address */
507 lbui r3, r0, TOPHYS(ex_tmp_data_loc_0); 509 lbui r4, r0, TOPHYS(ex_tmp_data_loc_0);
508 sbi r3, r4, 0; 510 sbi r4, r3, 0;
509 lbui r3, r0, TOPHYS(ex_tmp_data_loc_1); 511 lbui r4, r0, TOPHYS(ex_tmp_data_loc_1);
510 sbi r3, r4, 1; 512 sbi r4, r3, 1;
511 lbui r3, r0, TOPHYS(ex_tmp_data_loc_2); 513 lbui r4, r0, TOPHYS(ex_tmp_data_loc_2);
512 sbi r3, r4, 2; 514 sbi r4, r3, 2;
513 lbui r3, r0, TOPHYS(ex_tmp_data_loc_3); 515 lbui r4, r0, TOPHYS(ex_tmp_data_loc_3);
514 sbi r3, r4, 3; 516 sbi r4, r3, 3;
515 bri ex_handler_done; 517 bri ex_handler_done;
516 518
517ex_shw: 519ex_shw:
518 /* Store the lower half-word, byte-by-byte into destination address */ 520 /* Store the lower half-word, byte-by-byte into destination address */
519 swi r3, r0, TOPHYS(ex_tmp_data_loc_0); 521 swi r4, r0, TOPHYS(ex_tmp_data_loc_0);
520 lbui r3, r0, TOPHYS(ex_tmp_data_loc_2); 522 lbui r4, r0, TOPHYS(ex_tmp_data_loc_2);
521 sbi r3, r4, 0; 523 sbi r4, r3, 0;
522 lbui r3, r0, TOPHYS(ex_tmp_data_loc_3); 524 lbui r4, r0, TOPHYS(ex_tmp_data_loc_3);
523 sbi r3, r4, 1; 525 sbi r4, r3, 1;
524ex_sw_end: /* Exception handling of store word, ends. */ 526ex_sw_end: /* Exception handling of store word, ends. */
525 527
526ex_handler_done: 528ex_handler_done:
@@ -560,21 +562,16 @@ ex_handler_done:
560 */ 562 */
561 mfs r11, rpid 563 mfs r11, rpid
562 nop 564 nop
563 bri 4
564 mfs r3, rear /* Get faulting address */
565 nop
566 /* If we are faulting a kernel address, we have to use the 565 /* If we are faulting a kernel address, we have to use the
567 * kernel page tables. 566 * kernel page tables.
568 */ 567 */
569 ori r4, r0, CONFIG_KERNEL_START 568 ori r5, r0, CONFIG_KERNEL_START
570 cmpu r4, r3, r4 569 cmpu r5, r3, r5
571 bgti r4, ex3 570 bgti r5, ex3
572 /* First, check if it was a zone fault (which means a user 571 /* First, check if it was a zone fault (which means a user
573 * tried to access a kernel or read-protected page - always 572 * tried to access a kernel or read-protected page - always
574 * a SEGV). All other faults here must be stores, so no 573 * a SEGV). All other faults here must be stores, so no
575 * need to check ESR_S as well. */ 574 * need to check ESR_S as well. */
576 mfs r4, resr
577 nop
578 andi r4, r4, 0x800 /* ESR_Z - zone protection */ 575 andi r4, r4, 0x800 /* ESR_Z - zone protection */
579 bnei r4, ex2 576 bnei r4, ex2
580 577
@@ -589,8 +586,6 @@ ex_handler_done:
589 * tried to access a kernel or read-protected page - always 586 * tried to access a kernel or read-protected page - always
590 * a SEGV). All other faults here must be stores, so no 587 * a SEGV). All other faults here must be stores, so no
591 * need to check ESR_S as well. */ 588 * need to check ESR_S as well. */
592 mfs r4, resr
593 nop
594 andi r4, r4, 0x800 /* ESR_Z */ 589 andi r4, r4, 0x800 /* ESR_Z */
595 bnei r4, ex2 590 bnei r4, ex2
596 /* get current task address */ 591 /* get current task address */
@@ -665,8 +660,6 @@ ex_handler_done:
665 * R3 = ESR 660 * R3 = ESR
666 */ 661 */
667 662
668 mfs r3, rear /* Get faulting address */
669 nop
670 RESTORE_STATE; 663 RESTORE_STATE;
671 bri page_fault_instr_trap 664 bri page_fault_instr_trap
672 665
@@ -677,18 +670,15 @@ ex_handler_done:
677 */ 670 */
678 handle_data_tlb_miss_exception: 671 handle_data_tlb_miss_exception:
679 /* Working registers already saved: R3, R4, R5, R6 672 /* Working registers already saved: R3, R4, R5, R6
680 * R3 = ESR 673 * R3 = EAR, R4 = ESR
681 */ 674 */
682 mfs r11, rpid 675 mfs r11, rpid
683 nop 676 nop
684 bri 4
685 mfs r3, rear /* Get faulting address */
686 nop
687 677
688 /* If we are faulting a kernel address, we have to use the 678 /* If we are faulting a kernel address, we have to use the
689 * kernel page tables. */ 679 * kernel page tables. */
690 ori r4, r0, CONFIG_KERNEL_START 680 ori r6, r0, CONFIG_KERNEL_START
691 cmpu r4, r3, r4 681 cmpu r4, r3, r6
692 bgti r4, ex5 682 bgti r4, ex5
693 ori r4, r0, swapper_pg_dir 683 ori r4, r0, swapper_pg_dir
694 mts rpid, r0 /* TLB will have 0 TID */ 684 mts rpid, r0 /* TLB will have 0 TID */
@@ -731,9 +721,8 @@ ex_handler_done:
731 * Many of these bits are software only. Bits we don't set 721 * Many of these bits are software only. Bits we don't set
732 * here we (properly should) assume have the appropriate value. 722 * here we (properly should) assume have the appropriate value.
733 */ 723 */
724 brid finish_tlb_load
734 andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */ 725 andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */
735
736 bri finish_tlb_load
737 ex7: 726 ex7:
738 /* The bailout. Restore registers to pre-exception conditions 727 /* The bailout. Restore registers to pre-exception conditions
739 * and call the heavyweights to help us out. 728 * and call the heavyweights to help us out.
@@ -754,9 +743,6 @@ ex_handler_done:
754 */ 743 */
755 mfs r11, rpid 744 mfs r11, rpid
756 nop 745 nop
757 bri 4
758 mfs r3, rear /* Get faulting address */
759 nop
760 746
761 /* If we are faulting a kernel address, we have to use the 747 /* If we are faulting a kernel address, we have to use the
762 * kernel page tables. 748 * kernel page tables.
@@ -792,7 +778,7 @@ ex_handler_done:
792 lwi r4, r5, 0 /* Get Linux PTE */ 778 lwi r4, r5, 0 /* Get Linux PTE */
793 779
794 andi r6, r4, _PAGE_PRESENT 780 andi r6, r4, _PAGE_PRESENT
795 beqi r6, ex7 781 beqi r6, ex10
796 782
797 ori r4, r4, _PAGE_ACCESSED 783 ori r4, r4, _PAGE_ACCESSED
798 swi r4, r5, 0 784 swi r4, r5, 0
@@ -805,9 +791,8 @@ ex_handler_done:
805 * Many of these bits are software only. Bits we don't set 791 * Many of these bits are software only. Bits we don't set
806 * here we (properly should) assume have the appropriate value. 792 * here we (properly should) assume have the appropriate value.
807 */ 793 */
794 brid finish_tlb_load
808 andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */ 795 andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */
809
810 bri finish_tlb_load
811 ex10: 796 ex10:
812 /* The bailout. Restore registers to pre-exception conditions 797 /* The bailout. Restore registers to pre-exception conditions
813 * and call the heavyweights to help us out. 798 * and call the heavyweights to help us out.
@@ -837,9 +822,9 @@ ex_handler_done:
837 andi r5, r5, (MICROBLAZE_TLB_SIZE-1) 822 andi r5, r5, (MICROBLAZE_TLB_SIZE-1)
838 ori r6, r0, 1 823 ori r6, r0, 1
839 cmp r31, r5, r6 824 cmp r31, r5, r6
840 blti r31, sem 825 blti r31, ex12
841 addik r5, r6, 1 826 addik r5, r6, 1
842 sem: 827 ex12:
843 /* MS: save back current TLB index */ 828 /* MS: save back current TLB index */
844 swi r5, r0, TOPHYS(tlb_index) 829 swi r5, r0, TOPHYS(tlb_index)
845 830
@@ -859,7 +844,6 @@ ex_handler_done:
859 nop 844 nop
860 845
861 /* Done...restore registers and get out of here. */ 846 /* Done...restore registers and get out of here. */
862 ex12:
863 mts rpid, r11 847 mts rpid, r11
864 nop 848 nop
865 bri 4 849 bri 4
diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S
index df16c6287a8e..7cf86498326c 100644
--- a/arch/microblaze/kernel/misc.S
+++ b/arch/microblaze/kernel/misc.S
@@ -26,9 +26,10 @@
26 * We avoid flushing the pinned 0, 1 and possibly 2 entries. 26 * We avoid flushing the pinned 0, 1 and possibly 2 entries.
27 */ 27 */
28.globl _tlbia; 28.globl _tlbia;
29.type _tlbia, @function
29.align 4; 30.align 4;
30_tlbia: 31_tlbia:
31 addik r12, r0, 63 /* flush all entries (63 - 3) */ 32 addik r12, r0, MICROBLAZE_TLB_SIZE - 1 /* flush all entries (63 - 3) */
32 /* isync */ 33 /* isync */
33_tlbia_1: 34_tlbia_1:
34 mts rtlbx, r12 35 mts rtlbx, r12
@@ -41,11 +42,13 @@ _tlbia_1:
41 /* sync */ 42 /* sync */
42 rtsd r15, 8 43 rtsd r15, 8
43 nop 44 nop
45 .size _tlbia, . - _tlbia
44 46
45/* 47/*
46 * Flush MMU TLB for a particular address (in r5) 48 * Flush MMU TLB for a particular address (in r5)
47 */ 49 */
48.globl _tlbie; 50.globl _tlbie;
51.type _tlbie, @function
49.align 4; 52.align 4;
50_tlbie: 53_tlbie:
51 mts rtlbsx, r5 /* look up the address in TLB */ 54 mts rtlbsx, r5 /* look up the address in TLB */
@@ -59,17 +62,20 @@ _tlbie_1:
59 rtsd r15, 8 62 rtsd r15, 8
60 nop 63 nop
61 64
65 .size _tlbie, . - _tlbie
66
62/* 67/*
63 * Allocate TLB entry for early console 68 * Allocate TLB entry for early console
64 */ 69 */
65.globl early_console_reg_tlb_alloc; 70.globl early_console_reg_tlb_alloc;
71.type early_console_reg_tlb_alloc, @function
66.align 4; 72.align 4;
67early_console_reg_tlb_alloc: 73early_console_reg_tlb_alloc:
68 /* 74 /*
69 * Load a TLB entry for the UART, so that microblaze_progress() can use 75 * Load a TLB entry for the UART, so that microblaze_progress() can use
70 * the UARTs nice and early. We use a 4k real==virtual mapping. 76 * the UARTs nice and early. We use a 4k real==virtual mapping.
71 */ 77 */
72 ori r4, r0, 63 78 ori r4, r0, MICROBLAZE_TLB_SIZE - 1
73 mts rtlbx, r4 /* TLB slot 2 */ 79 mts rtlbx, r4 /* TLB slot 2 */
74 80
75 or r4,r5,r0 81 or r4,r5,r0
@@ -86,6 +92,8 @@ early_console_reg_tlb_alloc:
86 rtsd r15, 8 92 rtsd r15, 8
87 nop 93 nop
88 94
95 .size early_console_reg_tlb_alloc, . - early_console_reg_tlb_alloc
96
89/* 97/*
90 * Copy a whole page (4096 bytes). 98 * Copy a whole page (4096 bytes).
91 */ 99 */
@@ -104,6 +112,7 @@ early_console_reg_tlb_alloc:
104#define DCACHE_LINE_BYTES (4 * 4) 112#define DCACHE_LINE_BYTES (4 * 4)
105 113
106.globl copy_page; 114.globl copy_page;
115.type copy_page, @function
107.align 4; 116.align 4;
108copy_page: 117copy_page:
109 ori r11, r0, (PAGE_SIZE/DCACHE_LINE_BYTES) - 1 118 ori r11, r0, (PAGE_SIZE/DCACHE_LINE_BYTES) - 1
@@ -118,3 +127,5 @@ _copy_page_loop:
118 addik r11, r11, -1 127 addik r11, r11, -1
119 rtsd r15, 8 128 rtsd r15, 8
120 nop 129 nop
130
131 .size copy_page, . - copy_page
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 812f1bf06c9e..09bed44dfcd3 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -15,6 +15,7 @@
15#include <linux/bitops.h> 15#include <linux/bitops.h>
16#include <asm/system.h> 16#include <asm/system.h>
17#include <asm/pgalloc.h> 17#include <asm/pgalloc.h>
18#include <asm/uaccess.h> /* for USER_DS macros */
18#include <asm/cacheflush.h> 19#include <asm/cacheflush.h>
19 20
20void show_regs(struct pt_regs *regs) 21void show_regs(struct pt_regs *regs)
@@ -74,7 +75,10 @@ __setup("hlt", hlt_setup);
74 75
75void default_idle(void) 76void default_idle(void)
76{ 77{
77 if (!hlt_counter) { 78 if (likely(hlt_counter)) {
79 while (!need_resched())
80 cpu_relax();
81 } else {
78 clear_thread_flag(TIF_POLLING_NRFLAG); 82 clear_thread_flag(TIF_POLLING_NRFLAG);
79 smp_mb__after_clear_bit(); 83 smp_mb__after_clear_bit();
80 local_irq_disable(); 84 local_irq_disable();
@@ -82,9 +86,7 @@ void default_idle(void)
82 cpu_sleep(); 86 cpu_sleep();
83 local_irq_enable(); 87 local_irq_enable();
84 set_thread_flag(TIF_POLLING_NRFLAG); 88 set_thread_flag(TIF_POLLING_NRFLAG);
85 } else 89 }
86 while (!need_resched())
87 cpu_relax();
88} 90}
89 91
90void cpu_idle(void) 92void cpu_idle(void)
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index f974ec7aa357..17c98dbcec88 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -92,6 +92,12 @@ inline unsigned get_romfs_len(unsigned *addr)
92} 92}
93#endif /* CONFIG_MTD_UCLINUX_EBSS */ 93#endif /* CONFIG_MTD_UCLINUX_EBSS */
94 94
95#if defined(CONFIG_EARLY_PRINTK) && defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
96#define eprintk early_printk
97#else
98#define eprintk printk
99#endif
100
95void __init machine_early_init(const char *cmdline, unsigned int ram, 101void __init machine_early_init(const char *cmdline, unsigned int ram,
96 unsigned int fdt, unsigned int msr) 102 unsigned int fdt, unsigned int msr)
97{ 103{
@@ -139,32 +145,32 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
139 setup_early_printk(NULL); 145 setup_early_printk(NULL);
140#endif 146#endif
141 147
142 early_printk("Ramdisk addr 0x%08x, ", ram); 148 eprintk("Ramdisk addr 0x%08x, ", ram);
143 if (fdt) 149 if (fdt)
144 early_printk("FDT at 0x%08x\n", fdt); 150 eprintk("FDT at 0x%08x\n", fdt);
145 else 151 else
146 early_printk("Compiled-in FDT at 0x%08x\n", 152 eprintk("Compiled-in FDT at 0x%08x\n",
147 (unsigned int)_fdt_start); 153 (unsigned int)_fdt_start);
148 154
149#ifdef CONFIG_MTD_UCLINUX 155#ifdef CONFIG_MTD_UCLINUX
150 early_printk("Found romfs @ 0x%08x (0x%08x)\n", 156 eprintk("Found romfs @ 0x%08x (0x%08x)\n",
151 romfs_base, romfs_size); 157 romfs_base, romfs_size);
152 early_printk("#### klimit %p ####\n", old_klimit); 158 eprintk("#### klimit %p ####\n", old_klimit);
153 BUG_ON(romfs_size < 0); /* What else can we do? */ 159 BUG_ON(romfs_size < 0); /* What else can we do? */
154 160
155 early_printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", 161 eprintk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
156 romfs_size, romfs_base, (unsigned)&_ebss); 162 romfs_size, romfs_base, (unsigned)&_ebss);
157 163
158 early_printk("New klimit: 0x%08x\n", (unsigned)klimit); 164 eprintk("New klimit: 0x%08x\n", (unsigned)klimit);
159#endif 165#endif
160 166
161#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 167#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
162 if (msr) 168 if (msr)
163 early_printk("!!!Your kernel has setup MSR instruction but " 169 eprintk("!!!Your kernel has setup MSR instruction but "
164 "CPU don't have it %d\n", msr); 170 "CPU don't have it %d\n", msr);
165#else 171#else
166 if (!msr) 172 if (!msr)
167 early_printk("!!!Your kernel not setup MSR instruction but " 173 eprintk("!!!Your kernel not setup MSR instruction but "
168 "CPU have it %d\n", msr); 174 "CPU have it %d\n", msr);
169#endif 175#endif
170 176
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
index eaaaf805f31b..5e4570ef515c 100644
--- a/arch/microblaze/kernel/traps.c
+++ b/arch/microblaze/kernel/traps.c
@@ -22,13 +22,11 @@ void trap_init(void)
22 __enable_hw_exceptions(); 22 __enable_hw_exceptions();
23} 23}
24 24
25static int kstack_depth_to_print = 24; 25static unsigned long kstack_depth_to_print = 24;
26 26
27static int __init kstack_setup(char *s) 27static int __init kstack_setup(char *s)
28{ 28{
29 kstack_depth_to_print = strict_strtoul(s, 0, NULL); 29 return !strict_strtoul(s, 0, &kstack_depth_to_print);
30
31 return 1;
32} 30}
33__setup("kstack=", kstack_setup); 31__setup("kstack=", kstack_setup);
34 32
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index b579db068c06..4dfe47d3cd91 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -10,5 +10,4 @@ else
10lib-y += memcpy.o memmove.o 10lib-y += memcpy.o memmove.o
11endif 11endif
12 12
13lib-$(CONFIG_NO_MMU) += uaccess.o 13lib-y += uaccess_old.o
14lib-$(CONFIG_MMU) += uaccess_old.o
diff --git a/arch/microblaze/lib/fastcopy.S b/arch/microblaze/lib/fastcopy.S
index 02e3ab4eddf3..fdc48bb065d8 100644
--- a/arch/microblaze/lib/fastcopy.S
+++ b/arch/microblaze/lib/fastcopy.S
@@ -30,8 +30,9 @@
30 */ 30 */
31 31
32#include <linux/linkage.h> 32#include <linux/linkage.h>
33 33 .text
34 .globl memcpy 34 .globl memcpy
35 .type memcpy, @function
35 .ent memcpy 36 .ent memcpy
36 37
37memcpy: 38memcpy:
@@ -345,9 +346,11 @@ a_done:
345 rtsd r15, 8 346 rtsd r15, 8
346 nop 347 nop
347 348
349.size memcpy, . - memcpy
348.end memcpy 350.end memcpy
349/*----------------------------------------------------------------------------*/ 351/*----------------------------------------------------------------------------*/
350 .globl memmove 352 .globl memmove
353 .type memmove, @function
351 .ent memmove 354 .ent memmove
352 355
353memmove: 356memmove:
@@ -659,4 +662,5 @@ d_done:
659 rtsd r15, 8 662 rtsd r15, 8
660 nop 663 nop
661 664
665.size memmove, . - memmove
662.end memmove 666.end memmove
diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c
index cc2108b6b260..014bac92bdff 100644
--- a/arch/microblaze/lib/memcpy.c
+++ b/arch/microblaze/lib/memcpy.c
@@ -53,7 +53,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
53 const uint32_t *i_src; 53 const uint32_t *i_src;
54 uint32_t *i_dst; 54 uint32_t *i_dst;
55 55
56 if (c >= 4) { 56 if (likely(c >= 4)) {
57 unsigned value, buf_hold; 57 unsigned value, buf_hold;
58 58
59 /* Align the dstination to a word boundry. */ 59 /* Align the dstination to a word boundry. */
diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
index 4df851d41a29..ecfb663e1fc1 100644
--- a/arch/microblaze/lib/memset.c
+++ b/arch/microblaze/lib/memset.c
@@ -33,22 +33,23 @@
33#ifdef __HAVE_ARCH_MEMSET 33#ifdef __HAVE_ARCH_MEMSET
34void *memset(void *v_src, int c, __kernel_size_t n) 34void *memset(void *v_src, int c, __kernel_size_t n)
35{ 35{
36
37 char *src = v_src; 36 char *src = v_src;
38#ifdef CONFIG_OPT_LIB_FUNCTION 37#ifdef CONFIG_OPT_LIB_FUNCTION
39 uint32_t *i_src; 38 uint32_t *i_src;
40 uint32_t w32; 39 uint32_t w32 = 0;
41#endif 40#endif
42 /* Truncate c to 8 bits */ 41 /* Truncate c to 8 bits */
43 c = (c & 0xFF); 42 c = (c & 0xFF);
44 43
45#ifdef CONFIG_OPT_LIB_FUNCTION 44#ifdef CONFIG_OPT_LIB_FUNCTION
46 /* Make a repeating word out of it */ 45 if (unlikely(c)) {
47 w32 = c; 46 /* Make a repeating word out of it */
48 w32 |= w32 << 8; 47 w32 = c;
49 w32 |= w32 << 16; 48 w32 |= w32 << 8;
49 w32 |= w32 << 16;
50 }
50 51
51 if (n >= 4) { 52 if (likely(n >= 4)) {
52 /* Align the destination to a word boundary */ 53 /* Align the destination to a word boundary */
53 /* This is done in an endian independant manner */ 54 /* This is done in an endian independant manner */
54 switch ((unsigned) src & 3) { 55 switch ((unsigned) src & 3) {
diff --git a/arch/microblaze/lib/uaccess.c b/arch/microblaze/lib/uaccess.c
deleted file mode 100644
index a853fe089c44..000000000000
--- a/arch/microblaze/lib/uaccess.c
+++ /dev/null
@@ -1,48 +0,0 @@
1/*
2 * Copyright (C) 2006 Atmark Techno, Inc.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 */
8
9#include <linux/string.h>
10#include <asm/uaccess.h>
11
12#include <asm/bug.h>
13
14long strnlen_user(const char __user *src, long count)
15{
16 return strlen(src) + 1;
17}
18
19#define __do_strncpy_from_user(dst, src, count, res) \
20 do { \
21 char *tmp; \
22 strncpy(dst, src, count); \
23 for (tmp = dst; *tmp && count > 0; tmp++, count--) \
24 ; \
25 res = (tmp - dst); \
26 } while (0)
27
28long __strncpy_from_user(char *dst, const char __user *src, long count)
29{
30 long res;
31 __do_strncpy_from_user(dst, src, count, res);
32 return res;
33}
34
35long strncpy_from_user(char *dst, const char __user *src, long count)
36{
37 long res = -EFAULT;
38 if (access_ok(VERIFY_READ, src, 1))
39 __do_strncpy_from_user(dst, src, count, res);
40 return res;
41}
42
43unsigned long __copy_tofrom_user(void __user *to,
44 const void __user *from, unsigned long size)
45{
46 memcpy(to, from, size);
47 return 0;
48}
diff --git a/arch/microblaze/lib/uaccess_old.S b/arch/microblaze/lib/uaccess_old.S
index 67f991c14b8a..5810cec54a7a 100644
--- a/arch/microblaze/lib/uaccess_old.S
+++ b/arch/microblaze/lib/uaccess_old.S
@@ -22,6 +22,7 @@
22 22
23 .text 23 .text
24.globl __strncpy_user; 24.globl __strncpy_user;
25.type __strncpy_user, @function
25.align 4; 26.align 4;
26__strncpy_user: 27__strncpy_user:
27 28
@@ -50,7 +51,7 @@ __strncpy_user:
503: 513:
51 rtsd r15,8 52 rtsd r15,8
52 nop 53 nop
53 54 .size __strncpy_user, . - __strncpy_user
54 55
55 .section .fixup, "ax" 56 .section .fixup, "ax"
56 .align 2 57 .align 2
@@ -72,6 +73,7 @@ __strncpy_user:
72 73
73 .text 74 .text
74.globl __strnlen_user; 75.globl __strnlen_user;
76.type __strnlen_user, @function
75.align 4; 77.align 4;
76__strnlen_user: 78__strnlen_user:
77 addik r3,r6,0 79 addik r3,r6,0
@@ -90,7 +92,7 @@ __strnlen_user:
903: 923:
91 rtsd r15,8 93 rtsd r15,8
92 nop 94 nop
93 95 .size __strnlen_user, . - __strnlen_user
94 96
95 .section .fixup,"ax" 97 .section .fixup,"ax"
964: 984:
@@ -108,6 +110,7 @@ __strnlen_user:
108 */ 110 */
109 .text 111 .text
110.globl __copy_tofrom_user; 112.globl __copy_tofrom_user;
113.type __copy_tofrom_user, @function
111.align 4; 114.align 4;
112__copy_tofrom_user: 115__copy_tofrom_user:
113 /* 116 /*
@@ -116,20 +119,34 @@ __copy_tofrom_user:
116 * r7, r3 - count 119 * r7, r3 - count
117 * r4 - tempval 120 * r4 - tempval
118 */ 121 */
119 addik r3,r7,0 122 beqid r7, 3f /* zero size is not likely */
120 beqi r3,3f 123 andi r3, r7, 0x3 /* filter add count */
1211: 124 bneid r3, 4f /* if is odd value then byte copying */
122 lbu r4,r6,r0 125 or r3, r5, r6 /* find if is any to/from unaligned */
123 addik r6,r6,1 126 andi r3, r3, 0x3 /* mask unaligned */
1242: 127 bneid r3, 1f /* it is unaligned -> then jump */
125 sb r4,r5,r0 128 or r3, r0, r0
126 addik r3,r3,-1 129
127 bneid r3,1b 130/* at least one 4 byte copy */
128 addik r5,r5,1 /* delay slot */ 1315: lw r4, r6, r3
1326: sw r4, r5, r3
133 addik r7, r7, -4
134 bneid r7, 5b
135 addik r3, r3, 4
136 addik r3, r7, 0
137 rtsd r15, 8
138 nop
1394: or r3, r0, r0
1401: lbu r4,r6,r3
1412: sb r4,r5,r3
142 addik r7,r7,-1
143 bneid r7,1b
144 addik r3,r3,1 /* delay slot */
1293: 1453:
146 addik r3,r7,0
130 rtsd r15,8 147 rtsd r15,8
131 nop 148 nop
132 149 .size __copy_tofrom_user, . - __copy_tofrom_user
133 150
134 .section __ex_table,"a" 151 .section __ex_table,"a"
135 .word 1b,3b,2b,3b 152 .word 1b,3b,2b,3b,5b,3b,6b,3b
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index d9d249a66ff2..7af87f4b2c2c 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -106,7 +106,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
106 regs->esr = error_code; 106 regs->esr = error_code;
107 107
108 /* On a kernel SLB miss we can only check for a valid exception entry */ 108 /* On a kernel SLB miss we can only check for a valid exception entry */
109 if (kernel_mode(regs) && (address >= TASK_SIZE)) { 109 if (unlikely(kernel_mode(regs) && (address >= TASK_SIZE))) {
110 printk(KERN_WARNING "kernel task_size exceed"); 110 printk(KERN_WARNING "kernel task_size exceed");
111 _exception(SIGSEGV, regs, code, address); 111 _exception(SIGSEGV, regs, code, address);
112 } 112 }
@@ -122,7 +122,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
122 } 122 }
123#endif /* CONFIG_KGDB */ 123#endif /* CONFIG_KGDB */
124 124
125 if (in_atomic() || !mm) { 125 if (unlikely(in_atomic() || !mm)) {
126 if (kernel_mode(regs)) 126 if (kernel_mode(regs))
127 goto bad_area_nosemaphore; 127 goto bad_area_nosemaphore;
128 128
@@ -150,7 +150,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
150 * source. If this is invalid we can skip the address space check, 150 * source. If this is invalid we can skip the address space check,
151 * thus avoiding the deadlock. 151 * thus avoiding the deadlock.
152 */ 152 */
153 if (!down_read_trylock(&mm->mmap_sem)) { 153 if (unlikely(!down_read_trylock(&mm->mmap_sem))) {
154 if (kernel_mode(regs) && !search_exception_tables(regs->pc)) 154 if (kernel_mode(regs) && !search_exception_tables(regs->pc))
155 goto bad_area_nosemaphore; 155 goto bad_area_nosemaphore;
156 156
@@ -158,16 +158,16 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
158 } 158 }
159 159
160 vma = find_vma(mm, address); 160 vma = find_vma(mm, address);
161 if (!vma) 161 if (unlikely(!vma))
162 goto bad_area; 162 goto bad_area;
163 163
164 if (vma->vm_start <= address) 164 if (vma->vm_start <= address)
165 goto good_area; 165 goto good_area;
166 166
167 if (!(vma->vm_flags & VM_GROWSDOWN)) 167 if (unlikely(!(vma->vm_flags & VM_GROWSDOWN)))
168 goto bad_area; 168 goto bad_area;
169 169
170 if (!is_write) 170 if (unlikely(!is_write))
171 goto bad_area; 171 goto bad_area;
172 172
173 /* 173 /*
@@ -179,7 +179,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
179 * before setting the user r1. Thus we allow the stack to 179 * before setting the user r1. Thus we allow the stack to
180 * expand to 1MB without further checks. 180 * expand to 1MB without further checks.
181 */ 181 */
182 if (address + 0x100000 < vma->vm_end) { 182 if (unlikely(address + 0x100000 < vma->vm_end)) {
183 183
184 /* get user regs even if this fault is in kernel mode */ 184 /* get user regs even if this fault is in kernel mode */
185 struct pt_regs *uregs = current->thread.regs; 185 struct pt_regs *uregs = current->thread.regs;
@@ -209,15 +209,15 @@ good_area:
209 code = SEGV_ACCERR; 209 code = SEGV_ACCERR;
210 210
211 /* a write */ 211 /* a write */
212 if (is_write) { 212 if (unlikely(is_write)) {
213 if (!(vma->vm_flags & VM_WRITE)) 213 if (unlikely(!(vma->vm_flags & VM_WRITE)))
214 goto bad_area; 214 goto bad_area;
215 /* a read */ 215 /* a read */
216 } else { 216 } else {
217 /* protection fault */ 217 /* protection fault */
218 if (error_code & 0x08000000) 218 if (unlikely(error_code & 0x08000000))
219 goto bad_area; 219 goto bad_area;
220 if (!(vma->vm_flags & (VM_READ | VM_EXEC))) 220 if (unlikely(!(vma->vm_flags & (VM_READ | VM_EXEC))))
221 goto bad_area; 221 goto bad_area;
222 } 222 }
223 223
@@ -235,7 +235,7 @@ survive:
235 goto do_sigbus; 235 goto do_sigbus;
236 BUG(); 236 BUG();
237 } 237 }
238 if (fault & VM_FAULT_MAJOR) 238 if (unlikely(fault & VM_FAULT_MAJOR))
239 current->maj_flt++; 239 current->maj_flt++;
240 else 240 else
241 current->min_flt++; 241 current->min_flt++;
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 1608e2e1a44a..40bc10ede097 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -165,7 +165,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
165 for (addr = begin; addr < end; addr += PAGE_SIZE) { 165 for (addr = begin; addr < end; addr += PAGE_SIZE) {
166 ClearPageReserved(virt_to_page(addr)); 166 ClearPageReserved(virt_to_page(addr));
167 init_page_count(virt_to_page(addr)); 167 init_page_count(virt_to_page(addr));
168 memset((void *)addr, 0xcc, PAGE_SIZE);
169 free_page(addr); 168 free_page(addr);
170 totalram_pages++; 169 totalram_pages++;
171 } 170 }
@@ -208,14 +207,6 @@ void __init mem_init(void)
208} 207}
209 208
210#ifndef CONFIG_MMU 209#ifndef CONFIG_MMU
211/* Check against bounds of physical memory */
212int ___range_ok(unsigned long addr, unsigned long size)
213{
214 return ((addr < memory_start) ||
215 ((addr + size) > memory_end));
216}
217EXPORT_SYMBOL(___range_ok);
218
219int page_is_ram(unsigned long pfn) 210int page_is_ram(unsigned long pfn)
220{ 211{
221 return __range_ok(pfn, 0); 212 return __range_ok(pfn, 0);
diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index 63a6fd07c48f..d31312cde6ea 100644
--- a/arch/microblaze/mm/pgtable.c
+++ b/arch/microblaze/mm/pgtable.c
@@ -154,7 +154,7 @@ int map_page(unsigned long va, phys_addr_t pa, int flags)
154 err = 0; 154 err = 0;
155 set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, 155 set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT,
156 __pgprot(flags))); 156 __pgprot(flags)));
157 if (mem_init_done) 157 if (unlikely(mem_init_done))
158 flush_HPTE(0, va, pmd_val(*pd)); 158 flush_HPTE(0, va, pmd_val(*pd));
159 /* flush_HPTE(0, va, pg); */ 159 /* flush_HPTE(0, va, pg); */
160 } 160 }
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-28 21:15:09 -0500