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authorTejun Heo <tj@kernel.org>2010-04-05 11:37:28 +0900
committerTejun Heo <tj@kernel.org>2010-04-05 11:37:28 +0900
commit336f5899d287f06d8329e208fc14ce50f7ec9698 (patch)
tree9b762d450d5eb248a6ff8317badb7e223d93ed58 /arch/microblaze
parenta4ab2773205e8b94c18625455f85e3b6bb9d7ad6 (diff)
parentdb217dece3003df0841bacf9556b5c06aa097dae (diff)
downloadop-kernel-dev-336f5899d287f06d8329e208fc14ce50f7ec9698.zip
op-kernel-dev-336f5899d287f06d8329e208fc14ce50f7ec9698.tar.gz
Merge branch 'master' into export-slabh
Diffstat (limited to 'arch/microblaze')
-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 203ec61..76818f9 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -75,9 +75,6 @@ config LOCKDEP_SUPPORT
config HAVE_LATENCYTOP_SUPPORT
def_bool y
-config PCI
- def_bool n
-
config DTC
def_bool y
diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
index 836832d..72f6e85 100644
--- a/arch/microblaze/Makefile
+++ b/arch/microblaze/Makefile
@@ -84,7 +84,7 @@ define archhelp
echo '* linux.bin - Create raw binary'
echo ' linux.bin.gz - Create compressed raw binary'
echo ' simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
- echo ' - stripped elf with fdt blob
+ echo ' - stripped elf with fdt blob'
echo ' simpleImage.<dt>.unstrip - full ELF image with fdt blob'
echo ' *_defconfig - Select default config from arch/microblaze/configs'
echo ''
@@ -94,3 +94,5 @@ define archhelp
echo ' name of a dts file from the arch/microblaze/boot/dts/ directory'
echo ' (minus the .dts extension).'
endef
+
+MRPROPER_FILES += $(boot)/simpleImage.*
diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile
index 902cf98..57f50c2 100644
--- a/arch/microblaze/boot/Makefile
+++ b/arch/microblaze/boot/Makefile
@@ -23,8 +23,6 @@ $(obj)/system.dtb: $(obj)/$(DTB).dtb
endif
$(obj)/linux.bin: vmlinux FORCE
- [ -n $(CONFIG_INITRAMFS_SOURCE) ] && [ ! -e $(CONFIG_INITRAMFS_SOURCE) ] && \
- touch $(CONFIG_INITRAMFS_SOURCE) || echo "No CPIO image"
$(call if_changed,objcopy)
$(call if_changed,uimage)
@echo 'Kernel: $@ is ready' ' (#'`cat .version`')'
@@ -62,6 +60,4 @@ quiet_cmd_dtc = DTC $@
$(obj)/%.dtb: $(dtstree)/%.dts FORCE
$(call if_changed,dtc)
-clean-kernel += linux.bin linux.bin.gz simpleImage.*
-
-clean-files += *.dtb simpleImage.*.unstrip
+clean-files += *.dtb simpleImage.*.unstrip linux.bin.ub
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 563c6b9..8eeb092 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -14,7 +14,6 @@
#include <asm/ptrace.h>
#include <asm/setup.h>
#include <asm/registers.h>
-#include <asm/segment.h>
#include <asm/entry.h>
#include <asm/current.h>
diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h
deleted file mode 100644
index 0e7102c..0000000
--- a/arch/microblaze/include/asm/segment.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
- * Copyright (C) 2008-2009 PetaLogix
- * Copyright (C) 2006 Atmark Techno, Inc.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#ifndef _ASM_MICROBLAZE_SEGMENT_H
-#define _ASM_MICROBLAZE_SEGMENT_H
-
-# ifndef __ASSEMBLY__
-
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
-/*
- * On Microblaze the fs value is actually the top of the corresponding
- * address space.
- *
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- *
- * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
- */
-# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-# ifndef CONFIG_MMU
-# define KERNEL_DS MAKE_MM_SEG(0)
-# define USER_DS KERNEL_DS
-# else
-# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
-# endif
-
-# define get_ds() (KERNEL_DS)
-# define get_fs() (current_thread_info()->addr_limit)
-# define set_fs(val) (current_thread_info()->addr_limit = (val))
-
-# define segment_eq(a, b) ((a).seg == (b).seg)
-
-# endif /* __ASSEMBLY__ */
-#endif /* _ASM_MICROBLAZE_SEGMENT_H */
diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index 6e92885..b2ca80f 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -19,7 +19,6 @@
#ifndef __ASSEMBLY__
# include <linux/types.h>
# include <asm/processor.h>
-# include <asm/segment.h>
/*
* low level task data that entry.S needs immediate access to
@@ -60,6 +59,10 @@ struct cpu_context {
__u32 fsr;
};
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h
index bcb8b41..2e1353c 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);
extern void _tlbia(void);
#define __tlbia() { preempt_disable(); _tlbia(); preempt_enable(); }
+#define __tlbie(x) { _tlbie(x); }
static inline void local_flush_tlb_all(void)
{ __tlbia(); }
@@ -31,7 +32,7 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
{ __tlbia(); }
static inline void local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
- { _tlbie(vmaddr); }
+ { __tlbie(vmaddr); }
static inline void local_flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{ __tlbia(); }
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 371bd6e..446bec2 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -22,101 +22,73 @@
#include <asm/mmu.h>
#include <asm/page.h>
#include <asm/pgtable.h>
-#include <asm/segment.h>
#include <linux/string.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
-#define __clear_user(addr, n) (memset((void *)(addr), 0, (n)), 0)
-
-#ifndef CONFIG_MMU
-
-extern int ___range_ok(unsigned long addr, unsigned long size);
-
-#define __range_ok(addr, size) \
- ___range_ok((unsigned long)(addr), (unsigned long)(size))
-
-#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
-#define __access_ok(add, size) (__range_ok((addr), (size)) == 0)
-
-/* Undefined function to trigger linker error */
-extern int bad_user_access_length(void);
-
-/* FIXME this is function for optimalization -> memcpy */
-#define __get_user(var, ptr) \
-({ \
- int __gu_err = 0; \
- switch (sizeof(*(ptr))) { \
- case 1: \
- case 2: \
- case 4: \
- (var) = *(ptr); \
- break; \
- case 8: \
- memcpy((void *) &(var), (ptr), 8); \
- break; \
- default: \
- (var) = 0; \
- __gu_err = __get_user_bad(); \
- break; \
- } \
- __gu_err; \
-})
+/*
+ * On Microblaze the fs value is actually the top of the corresponding
+ * address space.
+ *
+ * The fs value determines whether argument validity checking should be
+ * performed or not. If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ *
+ * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
+ */
+# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
+# ifndef CONFIG_MMU
+# define KERNEL_DS MAKE_MM_SEG(0)
+# define USER_DS KERNEL_DS
+# else
+# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
+# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
+# endif
-/* FIXME is not there defined __pu_val */
-#define __put_user(var, ptr) \
-({ \
- int __pu_err = 0; \
- switch (sizeof(*(ptr))) { \
- case 1: \
- case 2: \
- case 4: \
- *(ptr) = (var); \
- break; \
- case 8: { \
- typeof(*(ptr)) __pu_val = (var); \
- memcpy(ptr, &__pu_val, sizeof(__pu_val)); \
- } \
- break; \
- default: \
- __pu_err = __put_user_bad(); \
- break; \
- } \
- __pu_err; \
-})
+# define get_ds() (KERNEL_DS)
+# define get_fs() (current_thread_info()->addr_limit)
+# define set_fs(val) (current_thread_info()->addr_limit = (val))
-#define __put_user_bad() (bad_user_access_length(), (-EFAULT))
+# define segment_eq(a, b) ((a).seg == (b).seg)
-#define put_user(x, ptr) __put_user((x), (ptr))
-#define get_user(x, ptr) __get_user((x), (ptr))
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue. No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path. This means when everything is well,
+ * we don't even have to jump over them. Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+struct exception_table_entry {
+ unsigned long insn, fixup;
+};
-#define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0)
-#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0)
+/* Returns 0 if exception not found and fixup otherwise. */
+extern unsigned long search_exception_table(unsigned long);
-#define __copy_to_user(to, from, n) (copy_to_user((to), (from), (n)))
-#define __copy_from_user(to, from, n) (copy_from_user((to), (from), (n)))
-#define __copy_to_user_inatomic(to, from, n) \
- (__copy_to_user((to), (from), (n)))
-#define __copy_from_user_inatomic(to, from, n) \
- (__copy_from_user((to), (from), (n)))
+#ifndef CONFIG_MMU
-static inline unsigned long clear_user(void *addr, unsigned long size)
+/* Check against bounds of physical memory */
+static inline int ___range_ok(unsigned long addr, unsigned long size)
{
- if (access_ok(VERIFY_WRITE, addr, size))
- size = __clear_user(addr, size);
- return size;
+ return ((addr < memory_start) ||
+ ((addr + size) > memory_end));
}
-/* Returns 0 if exception not found and fixup otherwise. */
-extern unsigned long search_exception_table(unsigned long);
+#define __range_ok(addr, size) \
+ ___range_ok((unsigned long)(addr), (unsigned long)(size))
-extern long strncpy_from_user(char *dst, const char *src, long count);
-extern long strnlen_user(const char *src, long count);
+#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
-#else /* CONFIG_MMU */
+#else
/*
* Address is valid if:
@@ -129,24 +101,88 @@ extern long strnlen_user(const char *src, long count);
/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n",
type?"WRITE":"READ",addr,size,get_fs().seg)) */
-/*
- * All the __XXX versions macros/functions below do not perform
- * access checking. It is assumed that the necessary checks have been
- * already performed before the finction (macro) is called.
- */
+#endif
-#define get_user(x, ptr) \
-({ \
- access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
- ? __get_user((x), (ptr)) : -EFAULT; \
-})
+#ifdef CONFIG_MMU
+# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
+# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
+#else
+# define __FIXUP_SECTION ".section .discard,\"ax\"\n"
+# define __EX_TABLE_SECTION ".section .discard,\"a\"\n"
+#endif
-#define put_user(x, ptr) \
-({ \
- access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
- ? __put_user((x), (ptr)) : -EFAULT; \
+extern unsigned long __copy_tofrom_user(void __user *to,
+ const void __user *from, unsigned long size);
+
+/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */
+static inline unsigned long __must_check __clear_user(void __user *to,
+ unsigned long n)
+{
+ /* normal memset with two words to __ex_table */
+ __asm__ __volatile__ ( \
+ "1: sb r0, %2, r0;" \
+ " addik %0, %0, -1;" \
+ " bneid %0, 1b;" \
+ " addik %2, %2, 1;" \
+ "2: " \
+ __EX_TABLE_SECTION \
+ ".word 1b,2b;" \
+ ".previous;" \
+ : "=r"(n) \
+ : "0"(n), "r"(to)
+ );
+ return n;
+}
+
+static inline unsigned long __must_check clear_user(void __user *to,
+ unsigned long n)
+{
+ might_sleep();
+ if (unlikely(!access_ok(VERIFY_WRITE, to, n)))
+ return n;
+
+ return __clear_user(to, n);
+}
+
+/* put_user and get_user macros */
+extern long __user_bad(void);
+
+#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
+({ \
+ __asm__ __volatile__ ( \
+ "1:" insn " %1, %2, r0;" \
+ " addk %0, r0, r0;" \
+ "2: " \
+ __FIXUP_SECTION \
+ "3: brid 2b;" \
+ " addik %0, r0, %3;" \
+ ".previous;" \
+ __EX_TABLE_SECTION \
+ ".word 1b,3b;" \
+ ".previous;" \
+ : "=&r"(__gu_err), "=r"(__gu_val) \
+ : "r"(__gu_ptr), "i"(-EFAULT) \
+ ); \
})
+/**
+ * get_user: - Get a simple variable from user space.
+ * @x: Variable to store result.
+ * @ptr: Source address, in user space.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * This macro copies a single simple variable from user space to kernel
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ * On error, the variable @x is set to zero.
+ */
+
#define __get_user(x, ptr) \
({ \
unsigned long __gu_val; \
@@ -163,30 +199,74 @@ extern long strnlen_user(const char *src, long count);
__get_user_asm("lw", (ptr), __gu_val, __gu_err); \
break; \
default: \
- __gu_val = 0; __gu_err = -EINVAL; \
+ /* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
} \
x = (__typeof__(*(ptr))) __gu_val; \
__gu_err; \
})
-#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
+
+#define get_user(x, ptr) \
({ \
- __asm__ __volatile__ ( \
- "1:" insn " %1, %2, r0; \
- addk %0, r0, r0; \
- 2: \
- .section .fixup,\"ax\"; \
- 3: brid 2b; \
- addik %0, r0, %3; \
- .previous; \
- .section __ex_table,\"a\"; \
- .word 1b,3b; \
- .previous;" \
- : "=r"(__gu_err), "=r"(__gu_val) \
- : "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
+ access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
+ ? __get_user((x), (ptr)) : -EFAULT; \
+})
+
+#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
+({ \
+ __asm__ __volatile__ ( \
+ "1:" insn " %1, %2, r0;" \
+ " addk %0, r0, r0;" \
+ "2: " \
+ __FIXUP_SECTION \
+ "3: brid 2b;" \
+ " addik %0, r0, %3;" \
+ ".previous;" \
+ __EX_TABLE_SECTION \
+ ".word 1b,3b;" \
+ ".previous;" \
+ : "=&r"(__gu_err) \
+ : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
+ ); \
})
+#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
+({ \
+ __asm__ __volatile__ (" lwi %0, %1, 0;" \
+ "1: swi %0, %2, 0;" \
+ " lwi %0, %1, 4;" \
+ "2: swi %0, %2, 4;" \
+ " addk %0, r0, r0;" \
+ "3: " \
+ __FIXUP_SECTION \
+ "4: brid 3b;" \
+ " addik %0, r0, %3;" \
+ ".previous;" \
+ __EX_TABLE_SECTION \
+ ".word 1b,4b,2b,4b;" \
+ ".previous;" \
+ : "=&r"(__gu_err) \
+ : "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
+ ); \
+})
+
+/**
+ * put_user: - Write a simple value into user space.
+ * @x: Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ */
+
#define __put_user(x, ptr) \
({ \
__typeof__(*(ptr)) volatile __gu_val = (x); \
@@ -195,7 +275,7 @@ extern long strnlen_user(const char *src, long count);
case 1: \
__put_user_asm("sb", (ptr), __gu_val, __gu_err); \
break; \
- case 2: \
+ case 2: \
__put_user_asm("sh", (ptr), __gu_val, __gu_err); \
break; \
case 4: \
@@ -205,121 +285,82 @@ extern long strnlen_user(const char *src, long count);
__put_user_asm_8((ptr), __gu_val, __gu_err); \
break; \
default: \
- __gu_err = -EINVAL; \
+ /*__gu_err = -EINVAL;*/ __gu_err = __user_bad(); \
} \
__gu_err; \
})
-#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
-({ \
-__asm__ __volatile__ (" lwi %0, %1, 0; \
- 1: swi %0, %2, 0; \
- lwi %0, %1, 4; \
- 2: swi %0, %2, 4; \
- addk %0,r0,r0; \
- 3: \
- .section .fixup,\"ax\"; \
- 4: brid 3b; \
- addik %0, r0, %3; \
- .previous; \
- .section __ex_table,\"a\"; \
- .word 1b,4b,2b,4b; \
- .previous;" \
- : "=&r"(__gu_err) \
- : "r"(&__gu_val), \
- "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
-})
+#ifndef CONFIG_MMU
-#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
-({ \
- __asm__ __volatile__ ( \
- "1:" insn " %1, %2, r0; \
- addk %0, r0, r0; \
- 2: \
- .section .fixup,\"ax\"; \
- 3: brid 2b; \
- addik %0, r0, %3; \
- .previous; \
- .section __ex_table,\"a\"; \
- .word 1b,3b; \
- .previous;" \
- : "=r"(__gu_err) \
- : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
-})
+#define put_user(x, ptr) __put_user((x), (ptr))
-/*
- * Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail.
- */
-static inline int clear_user(char *to, int size)
-{
- if (size && access_ok(VERIFY_WRITE, to, size)) {
- __asm__ __volatile__ (" \
- 1: \
- sb r0, %2, r0; \
- addik %0, %0, -1; \
- bneid %0, 1b; \
- addik %2, %2, 1; \
- 2: \
- .section __ex_table,\"a\"; \
- .word 1b,2b; \
- .section .text;" \
- : "=r"(size) \
- : "0"(size), "r"(to)
- );
- }
- return size;
-}
+#else /* CONFIG_MMU */
-#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n))
+#define put_user(x, ptr) \
+({ \
+ access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
+ ? __put_user((x), (ptr)) : -EFAULT; \
+})
+#endif /* CONFIG_MMU */
+
+/* copy_to_from_user */
+#define __copy_from_user(to, from, n) \
+ __copy_tofrom_user((__force void __user *)(to), \
+ (void __user *)(from), (n))
#define __copy_from_user_inatomic(to, from, n) \
copy_from_user((to), (from), (n))
-#define copy_to_user(to, from, n) \
- (access_ok(VERIFY_WRITE, (to), (n)) ? \
- __copy_tofrom_user((void __user *)(to), \
- (__force const void __user *)(from), (n)) \
- : -EFAULT)
+static inline long copy_from_user(void *to,
+ const void __user *from, unsigned long n)
+{
+ might_sleep();
+ if (access_ok(VERIFY_READ, from, n))
+ return __copy_from_user(to, from, n);
+ return n;
+}
-#define __copy_to_user(to, from, n) copy_to_user((to), (from), (n))
+#define __copy_to_user(to, from, n) \
+ __copy_tofrom_user((void __user *)(to), \
+ (__force const void __user *)(from), (n))
#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n))
-#define copy_from_user(to, from, n) \
- (access_ok(VERIFY_READ, (from), (n)) ? \
- __copy_tofrom_user((__force void __user *)(to), \
- (void __user *)(from), (n)) \
- : -EFAULT)
+static inline long copy_to_user(void __user *to,
+ const void *from, unsigned long n)
+{
+ might_sleep();
+ if (access_ok(VERIFY_WRITE, to, n))
+ return __copy_to_user(to, from, n);
+ return n;
+}
+/*
+ * Copy a null terminated string from userspace.
+ */
extern int __strncpy_user(char *to, const char __user *from, int len);
-extern int __strnlen_user(const char __user *sstr, int len);
-#define strncpy_from_user(to, from, len) \
- (access_ok(VERIFY_READ, from, 1) ? \
- __strncpy_user(to, from, len) : -EFAULT)
-#define strnlen_user(str, len) \
- (access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)
+#define __strncpy_from_user __strncpy_user
-#endif /* CONFIG_MMU */
-
-extern unsigned long __copy_tofrom_user(void __user *to,
- const void __user *from, unsigned long size);
+static inline long
+strncpy_from_user(char *dst, const char __user *src, long count)
+{
+ if (!access_ok(VERIFY_READ, src, 1))
+ return -EFAULT;
+ return __strncpy_from_user(dst, src, count);
+}
/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
+ * Return the size of a string (including the ending 0)
*
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
+ * Return 0 on exception, a value greater than N if too long
*/
-struct exception_table_entry {
- unsigned long insn, fixup;
-};
+extern int __strnlen_user(const char __user *sstr, int len);
+
+static inline long strnlen_user(const char __user *src, long n)
+{
+ if (!access_ok(VERIFY_READ, src, 1))
+ return 0;
+ return __strnlen_user(src, n);
+}
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 9d69ca4..ce72dd4 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -38,7 +38,7 @@ static inline void __dma_sync_page(unsigned long paddr, unsigned long offset,
static unsigned long get_dma_direct_offset(struct device *dev)
{
- if (dev)
+ if (likely(dev))
return (unsigned long)dev->archdata.dma_data;
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 cb7815c..da6a5f5 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -51,6 +51,12 @@ swapper_pg_dir:
.text
ENTRY(_start)
+#if CONFIG_KERNEL_BASE_ADDR == 0
+ brai TOPHYS(real_start)
+ .org 0x100
+real_start:
+#endif
+
mfs r1, rmsr
andi r1, r1, ~2
mts rmsr, r1
@@ -99,8 +105,8 @@ no_fdt_arg:
tophys(r4,r4) /* convert to phys address */
ori r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */
_copy_command_line:
- lbu r2, r5, r6 /* r7=r5+r6 - r5 contain pointer to command line */
- sb r2, r4, r6 /* addr[r4+r6]= r7*/
+ lbu r2, r5, r6 /* r2=r5+r6 - r5 contain pointer to command line */
+ sb r2, r4, r6 /* addr[r4+r6]= r2*/
addik r6, r6, 1 /* increment counting */
bgtid r3, _copy_command_line /* loop for all entries */
addik r3, r3, -1 /* descrement loop */
@@ -128,7 +134,7 @@ _copy_bram:
* virtual to physical.
*/
nop
- addik r3, r0, 63 /* Invalidate all TLB entries */
+ addik r3, r0, MICROBLAZE_TLB_SIZE -1 /* Invalidate all TLB entries */
_invalidate:
mts rtlbx, r3
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 2b86c03..995a212 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -313,13 +313,13 @@ _hw_exception_handler:
mfs r5, rmsr;
nop
swi r5, r1, 0;
- mfs r3, resr
+ mfs r4, resr
nop
- mfs r4, rear;
+ mfs r3, rear;
nop
#ifndef CONFIG_MMU
- andi r5, r3, 0x1000; /* Check ESR[DS] */
+ andi r5, r4, 0x1000; /* Check ESR[DS] */
beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */
mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
nop
@@ -327,13 +327,14 @@ not_in_delay_slot:
swi r17, r1, PT_R17
#endif
- andi r5, r3, 0x1F; /* Extract ESR[EXC] */
+ andi r5, r4, 0x1F; /* Extract ESR[EXC] */
#ifdef CONFIG_MMU
/* Calculate exception vector offset = r5 << 2 */
addk r6, r5, r5; /* << 1 */
addk r6, r6, r6; /* << 2 */
+#ifdef DEBUG
/* counting which exception happen */
lwi r5, r0, 0x200 + TOPHYS(r0_ram)
addi r5, r5, 1
@@ -341,6 +342,7 @@ not_in_delay_slot:
lwi r5, r6, 0x200 + TOPHYS(r0_ram)
addi r5, r5, 1
swi r5, r6, 0x200 + TOPHYS(r0_ram)
+#endif
/* end */
/* Load the HW Exception vector */
lwi r6, r6, TOPHYS(_MB_HW_ExceptionVectorTable)
@@ -376,7 +378,7 @@ handle_other_ex: /* Handle Other exceptions here */
swi r18, r1, PT_R18
or r5, r1, r0
- andi r6, r3, 0x1F; /* Load ESR[EC] */
+ andi r6, r4, 0x1F; /* Load ESR[EC] */
lwi r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */
swi r7, r1, PT_MODE
mfs r7, rfsr
@@ -426,11 +428,11 @@ handle_other_ex: /* Handle Other exceptions here */
*/
handle_unaligned_ex:
/* Working registers already saved: R3, R4, R5, R6
- * R3 = ESR
- * R4 = EAR
+ * R4 = ESR
+ * R3 = EAR
*/
#ifdef CONFIG_MMU
- andi r6, r3, 0x1000 /* Check ESR[DS] */
+ andi r6, r4, 0x1000 /* Check ESR[DS] */
beqi r6, _no_delayslot /* Branch if ESR[DS] not set */
mfs r17, rbtr; /* ESR[DS] set - return address in BTR */
nop
@@ -439,7 +441,7 @@ _no_delayslot:
RESTORE_STATE;
bri unaligned_data_trap
#endif
- andi r6, r3, 0x3E0; /* Mask and extract the register operand */
+ andi r6, r4, 0x3E0; /* Mask and extract the register operand */
srl r6, r6; /* r6 >> 5 */
srl r6, r6;
srl r6, r6;
@@ -448,33 +450,33 @@ _no_delayslot:
/* Store the register operand in a temporary location */
sbi r6, r0, TOPHYS(ex_reg_op);
- andi r6, r3, 0x400; /* Extract ESR[S] */
+ andi r6, r4, 0x400; /* Extract ESR[S] */
bnei r6, ex_sw;
ex_lw:
- andi r6, r3, 0x800; /* Extract ESR[W] */
+ andi r6, r4, 0x800; /* Extract ESR[W] */
beqi r6, ex_lhw;
- lbui r5, r4, 0; /* Exception address in r4 */
+ lbui r5, r3, 0; /* Exception address in r3 */
/* Load a word, byte-by-byte from destination address
and save it in tmp space */
sbi r5, r0, TOPHYS(ex_tmp_data_loc_0);
- lbui r5, r4, 1;
+ lbui r5, r3, 1;
sbi r5, r0, TOPHYS(ex_tmp_data_loc_1);
- lbui r5, r4, 2;
+ lbui r5, r3, 2;
sbi r5, r0, TOPHYS(ex_tmp_data_loc_2);
- lbui r5, r4, 3;
+ lbui r5, r3, 3;
sbi r5, r0, TOPHYS(ex_tmp_data_loc_3);
- /* Get the destination register value into r3 */
- lwi r3, r0, TOPHYS(ex_tmp_data_loc_0);
+ /* Get the destination register value into r4 */
+ lwi r4, r0, TOPHYS(ex_tmp_data_loc_0);
bri ex_lw_tail;
ex_lhw:
- lbui r5, r4, 0; /* Exception address in r4 */
+ lbui r5, r3, 0; /* Exception address in r3 */
/* Load a half-word, byte-by-byte from destination
address and save it in tmp space */
sbi r5, r0, TOPHYS(ex_tmp_data_loc_0);
- lbui r5, r4, 1;
+ lbui r5, r3, 1;
sbi r5, r0, TOPHYS(ex_tmp_data_loc_1);
- /* Get the destination register value into r3 */
- lhui r3, r0, TOPHYS(ex_tmp_data_loc_0);
+ /* Get the destination register value into r4 */
+ lhui r4, r0, TOPHYS(ex_tmp_data_loc_0);
ex_lw_tail:
/* Get the destination register number into r5 */
lbui r5, r0, TOPHYS(ex_reg_op);
@@ -502,25 +504,25 @@ ex_sw_tail:
andi r6, r6, 0x800; /* Extract ESR[W] */
beqi r6, ex_shw;
/* Get the word - delay slot */
- swi r3, r0, TOPHYS(ex_tmp_data_loc_0);
+ swi r4, r0, TOPHYS(ex_tmp_data_loc_0);
/* Store the word, byte-by-byte into destination address */
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_0);
- sbi r3, r4, 0;
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_1);
- sbi r3, r4, 1;
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_2);
- sbi r3, r4, 2;
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_3);
- sbi r3, r4, 3;
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_0);
+ sbi r4, r3, 0;
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_1);
+ sbi r4, r3, 1;
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_2);
+ sbi r4, r3, 2;
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_3);
+ sbi r4, r3, 3;
bri ex_handler_done;
ex_shw:
/* Store the lower half-word, byte-by-byte into destination address */
- swi r3, r0, TOPHYS(ex_tmp_data_loc_0);
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_2);
- sbi r3, r4, 0;
- lbui r3, r0, TOPHYS(ex_tmp_data_loc_3);
- sbi r3, r4, 1;
+ swi r4, r0, TOPHYS(ex_tmp_data_loc_0);
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_2);
+ sbi r4, r3, 0;
+ lbui r4, r0, TOPHYS(ex_tmp_data_loc_3);
+ sbi r4, r3, 1;
ex_sw_end: /* Exception handling of store word, ends. */
ex_handler_done:
@@ -560,21 +562,16 @@ ex_handler_done:
*/
mfs r11, rpid
nop
- bri 4
- mfs r3, rear /* Get faulting address */
- nop
/* If we are faulting a kernel address, we have to use the
* kernel page tables.
*/
- ori r4, r0, CONFIG_KERNEL_START
- cmpu r4, r3, r4
- bgti r4, ex3
+ ori r5, r0, CONFIG_KERNEL_START
+ cmpu r5, r3, r5
+ bgti r5, ex3
/* First, check if it was a zone fault (which means a user
* tried to access a kernel or read-protected page - always
* a SEGV). All other faults here must be stores, so no
* need to check ESR_S as well. */
- mfs r4, resr
- nop
andi r4, r4, 0x800 /* ESR_Z - zone protection */
bnei r4, ex2
@@ -589,8 +586,6 @@ ex_handler_done:
* tried to access a kernel or read-protected page - always
* a SEGV). All other faults here must be stores, so no
* need to check ESR_S as well. */
- mfs r4, resr
- nop
andi r4, r4, 0x800 /* ESR_Z */
bnei r4, ex2
/* get current task address */
@@ -665,8 +660,6 @@ ex_handler_done:
* R3 = ESR
*/
- mfs r3, rear /* Get faulting address */
- nop
RESTORE_STATE;
bri page_fault_instr_trap
@@ -677,18 +670,15 @@ ex_handler_done:
*/
handle_data_tlb_miss_exception:
/* Working registers already saved: R3, R4, R5, R6
- * R3 = ESR
+ * R3 = EAR, R4 = ESR
*/
mfs r11, rpid
nop
- bri 4
- mfs r3, rear /* Get faulting address */
- nop
/* If we are faulting a kernel address, we have to use the
* kernel page tables. */
- ori r4, r0, CONFIG_KERNEL_START
- cmpu r4, r3, r4
+ ori r6, r0, CONFIG_KERNEL_START
+ cmpu r4, r3, r6
bgti r4, ex5
ori r4, r0, swapper_pg_dir
mts rpid, r0 /* TLB will have 0 TID */
@@ -731,9 +721,8 @@ ex_handler_done:
* Many of these bits are software only. Bits we don't set
* here we (properly should) assume have the appropriate value.
*/
+ brid finish_tlb_load
andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */
-
- bri finish_tlb_load
ex7:
/* The bailout. Restore registers to pre-exception conditions
* and call the heavyweights to help us out.
@@ -754,9 +743,6 @@ ex_handler_done:
*/
mfs r11, rpid
nop
- bri 4
- mfs r3, rear /* Get faulting address */
- nop
/* If we are faulting a kernel address, we have to use the
* kernel page tables.
@@ -792,7 +778,7 @@ ex_handler_done:
lwi r4, r5, 0 /* Get Linux PTE */
andi r6, r4, _PAGE_PRESENT
- beqi r6, ex7
+ beqi r6, ex10
ori r4, r4, _PAGE_ACCESSED
swi r4, r5, 0
@@ -805,9 +791,8 @@ ex_handler_done:
* Many of these bits are software only. Bits we don't set
* here we (properly should) assume have the appropriate value.
*/
+ brid finish_tlb_load
andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */
-
- bri finish_tlb_load
ex10:
/* The bailout. Restore registers to pre-exception conditions
* and call the heavyweights to help us out.
@@ -837,9 +822,9 @@ ex_handler_done:
andi r5, r5, (MICROBLAZE_TLB_SIZE-1)
ori r6, r0, 1
cmp r31, r5, r6
- blti r31, sem
+ blti r31, ex12
addik r5, r6, 1
- sem:
+ ex12:
/* MS: save back current TLB index */
swi r5, r0, TOPHYS(tlb_index)
@@ -859,7 +844,6 @@ ex_handler_done:
nop
/* Done...restore registers and get out of here. */
- ex12:
mts rpid, r11
nop
bri 4
diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S
index df16c62..7cf8649 100644
--- a/arch/microblaze/kernel/misc.S
+++ b/arch/microblaze/kernel/misc.S
@@ -26,9 +26,10 @@
* We avoid flushing the pinned 0, 1 and possibly 2 entries.
*/
.globl _tlbia;
+.type _tlbia, @function
.align 4;
_tlbia:
- addik r12, r0, 63 /* flush all entries (63 - 3) */
+ addik r12, r0, MICROBLAZE_TLB_SIZE - 1 /* flush all entries (63 - 3) */
/* isync */
_tlbia_1:
mts rtlbx, r12
@@ -41,11 +42,13 @@ _tlbia_1:
/* sync */
rtsd r15, 8
nop
+ .size _tlbia, . - _tlbia
/*
* Flush MMU TLB for a particular address (in r5)
*/
.globl _tlbie;
+.type _tlbie, @function
.align 4;
_tlbie:
mts rtlbsx, r5 /* look up the address in TLB */
@@ -59,17 +62,20 @@ _tlbie_1:
rtsd r15, 8
nop
+ .size _tlbie, . - _tlbie
+
/*
* Allocate TLB entry for early console
*/
.globl early_console_reg_tlb_alloc;
+.type early_console_reg_tlb_alloc, @function
.align 4;
early_console_reg_tlb_alloc:
/*
* Load a TLB entry for the UART, so that microblaze_progress() can use
* the UARTs nice and early. We use a 4k real==virtual mapping.
*/
- ori r4, r0, 63
+ ori r4, r0, MICROBLAZE_TLB_SIZE - 1
mts rtlbx, r4 /* TLB slot 2 */
or r4,r5,r0
@@ -86,6 +92,8 @@ early_console_reg_tlb_alloc:
rtsd r15, 8
nop
+ .size early_console_reg_tlb_alloc, . - early_console_reg_tlb_alloc
+
/*
* Copy a whole page (4096 bytes).
*/
@@ -104,6 +112,7 @@ early_console_reg_tlb_alloc:
#define DCACHE_LINE_BYTES (4 * 4)
.globl copy_page;
+.type copy_page, @function
.align 4;
copy_page:
ori r11, r0, (PAGE_SIZE/DCACHE_LINE_BYTES) - 1
@@ -118,3 +127,5 @@ _copy_page_loop:
addik r11, r11, -1
rtsd r15, 8
nop
+
+ .size copy_page, . - copy_page
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 812f1bf..09bed44 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -15,6 +15,7 @@
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/pgalloc.h>
+#include <asm/uaccess.h> /* for USER_DS macros */
#include <asm/cacheflush.h>
void show_regs(struct pt_regs *regs)
@@ -74,7 +75,10 @@ __setup("hlt", hlt_setup);
void default_idle(void)
{
- if (!hlt_counter) {
+ if (likely(hlt_counter)) {
+ while (!need_resched())
+ cpu_relax();
+ } else {
clear_thread_flag(TIF_POLLING_NRFLAG);
smp_mb__after_clear_bit();
local_irq_disable();
@@ -82,9 +86,7 @@ void default_idle(void)
cpu_sleep();
local_irq_enable();
set_thread_flag(TIF_POLLING_NRFLAG);
- } else
- while (!need_resched())
- cpu_relax();
+ }
}
void cpu_idle(void)
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index f974ec7..17c98db 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -92,6 +92,12 @@ inline unsigned get_romfs_len(unsigned *addr)
}
#endif /* CONFIG_MTD_UCLINUX_EBSS */
+#if defined(CONFIG_EARLY_PRINTK) && defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
+#define eprintk early_printk
+#else
+#define eprintk printk
+#endif
+
void __init machine_early_init(const char *cmdline, unsigned int ram,
unsigned int fdt, unsigned int msr)
{
@@ -139,32 +145,32 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
setup_early_printk(NULL);
#endif
- early_printk("Ramdisk addr 0x%08x, ", ram);
+ eprintk("Ramdisk addr 0x%08x, ", ram);
if (fdt)
- early_printk("FDT at 0x%08x\n", fdt);
+ eprintk("FDT at 0x%08x\n", fdt);
else
- early_printk("Compiled-in FDT at 0x%08x\n",
+ eprintk("Compiled-in FDT at 0x%08x\n",
(unsigned int)_fdt_start);
#ifdef CONFIG_MTD_UCLINUX
- early_printk("Found romfs @ 0x%08x (0x%08x)\n",
+ eprintk("Found romfs @ 0x%08x (0x%08x)\n",
romfs_base, romfs_size);
- early_printk("#### klimit %p ####\n", old_klimit);
+ eprintk("#### klimit %p ####\n", old_klimit);
BUG_ON(romfs_size < 0); /* What else can we do? */
- early_printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
+ eprintk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
romfs_size, romfs_base, (unsigned)&_ebss);
- early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
+ eprintk("New klimit: 0x%08x\n", (unsigned)klimit);
#endif
#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
if (msr)
- early_printk("!!!Your kernel has setup MSR instruction but "
+ eprintk("!!!Your kernel has setup MSR instruction but "
"CPU don't have it %d\n", msr);
#else
if (!msr)
- early_printk("!!!Your kernel not setup MSR instruction but "
+ eprintk("!!!Your kernel not setup MSR instruction but "
"CPU have it %d\n", msr);
#endif
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
index eaaaf80..5e4570e 100644
--- a/arch/microblaze/kernel/traps.c
+++ b/arch/microblaze/kernel/traps.c
@@ -22,13 +22,11 @@ void trap_init(void)
__enable_hw_exceptions();
}
-static int kstack_depth_to_print = 24;
+static unsigned long kstack_depth_to_print = 24;
static int __init kstack_setup(char *s)
{
- kstack_depth_to_print = strict_strtoul(s, 0, NULL);
-
- return 1;
+ return !strict_strtoul(s, 0, &kstack_depth_to_print);
}
__setup("kstack=", kstack_setup);
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index b579db06..4dfe47d 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -10,5 +10,4 @@ else
lib-y += memcpy.o memmove.o
endif
-lib-$(CONFIG_NO_MMU) += uaccess.o
-lib-$(CONFIG_MMU) += uaccess_old.o
+lib-y += uaccess_old.o
diff --git a/arch/microblaze/lib/fastcopy.S b/arch/microblaze/lib/fastcopy.S
index 02e3ab4..fdc48bb 100644
--- a/arch/microblaze/lib/fastcopy.S
+++ b/arch/microblaze/lib/fastcopy.S
@@ -30,8 +30,9 @@
*/
#include <linux/linkage.h>
-
+ .text
.globl memcpy
+ .type memcpy, @function
.ent memcpy
memcpy:
@@ -345,9 +346,11 @@ a_done:
rtsd r15, 8
nop
+.size memcpy, . - memcpy
.end memcpy
/*----------------------------------------------------------------------------*/
.globl memmove
+ .type memmove, @function
.ent memmove
memmove:
@@ -659,4 +662,5 @@ d_done:
rtsd r15, 8
nop
+.size memmove, . - memmove
.end memmove
diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c
index cc2108b..014bac9 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)
const uint32_t *i_src;
uint32_t *i_dst;
- if (c >= 4) {
+ if (likely(c >= 4)) {
unsigned value, buf_hold;
/* Align the dstination to a word boundry. */
diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
index 4df851d..ecfb663 100644
--- a/arch/microblaze/lib/memset.c
+++ b/arch/microblaze/lib/memset.c
@@ -33,22 +33,23 @@
#ifdef __HAVE_ARCH_MEMSET
void *memset(void *v_src, int c, __kernel_size_t n)
{
-
char *src = v_src;
#ifdef CONFIG_OPT_LIB_FUNCTION
uint32_t *i_src;
- uint32_t w32;
+ uint32_t w32 = 0;
#endif
/* Truncate c to 8 bits */
c = (c & 0xFF);
#ifdef CONFIG_OPT_LIB_FUNCTION
- /* Make a repeating word out of it */
- w32 = c;
- w32 |= w32 << 8;
- w32 |= w32 << 16;
+ if (unlikely(c)) {
+ /* Make a repeating word out of it */
+ w32 = c;
+ w32 |= w32 << 8;
+ w32 |= w32 << 16;
+ }
- if (n >= 4) {
+ if (likely(n >= 4)) {
/* Align the destination to a word boundary */
/* This is done in an endian independant manner */
switch ((unsigned) src & 3) {
diff --git a/arch/microblaze/lib/uaccess.c b/arch/microblaze/lib/uaccess.c
deleted file mode 100644
index a853fe0..0000000
--- a/arch/microblaze/lib/uaccess.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2006 Atmark Techno, Inc.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/string.h>
-#include <asm/uaccess.h>
-
-#include <asm/bug.h>
-
-long strnlen_user(const char __user *src, long count)
-{
- return strlen(src) + 1;
-}
-
-#define __do_strncpy_from_user(dst, src, count, res) \
- do { \
- char *tmp; \
- strncpy(dst, src, count); \
- for (tmp = dst; *tmp && count > 0; tmp++, count--) \
- ; \
- res = (tmp - dst); \
- } while (0)
-
-long __strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res;
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-long strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-unsigned long __copy_tofrom_user(void __user *to,
- const void __user *from, unsigned long size)
-{
- memcpy(to, from, size);
- return 0;
-}
diff --git a/arch/microblaze/lib/uaccess_old.S b/arch/microblaze/lib/uaccess_old.S
index 67f991c..5810cec 100644
--- a/arch/microblaze/lib/uaccess_old.S
+++ b/arch/microblaze/lib/uaccess_old.S
@@ -22,6 +22,7 @@
.text
.globl __strncpy_user;
+.type __strncpy_user, @function
.align 4;
__strncpy_user:
@@ -50,7 +51,7 @@ __strncpy_user:
3:
rtsd r15,8
nop
-
+ .size __strncpy_user, . - __strncpy_user
.section .fixup, "ax"
.align 2
@@ -72,6 +73,7 @@ __strncpy_user:
.text
.globl __strnlen_user;
+.type __strnlen_user, @function
.align 4;
__strnlen_user:
addik r3,r6,0
@@ -90,7 +92,7 @@ __strnlen_user:
3:
rtsd r15,8
nop
-
+ .size __strnlen_user, . - __strnlen_user
.section .fixup,"ax"
4:
@@ -108,6 +110,7 @@ __strnlen_user:
*/
.text
.globl __copy_tofrom_user;
+.type __copy_tofrom_user, @function
.align 4;
__copy_tofrom_user:
/*
@@ -116,20 +119,34 @@ __copy_tofrom_user:
* r7, r3 - count
* r4 - tempval
*/
- addik r3,r7,0
- beqi r3,3f
-1:
- lbu r4,r6,r0
- addik r6,r6,1
-2:
- sb r4,r5,r0
- addik r3,r3,-1
- bneid r3,1b
- addik r5,r5,1 /* delay slot */
+ beqid r7, 3f /* zero size is not likely */
+ andi r3, r7, 0x3 /* filter add count */
+ bneid r3, 4f /* if is odd value then byte copying */
+ or r3, r5, r6 /* find if is any to/from unaligned */
+ andi r3, r3, 0x3 /* mask unaligned */
+ bneid r3, 1f /* it is unaligned -> then jump */
+ or r3, r0, r0
+
+/* at least one 4 byte copy */
+5: lw r4, r6, r3
+6: sw r4, r5, r3
+ addik r7, r7, -4
+ bneid r7, 5b
+ addik r3, r3, 4
+ addik r3, r7, 0
+ rtsd r15, 8
+ nop
+4: or r3, r0, r0
+1: lbu r4,r6,r3
+2: sb r4,r5,r3
+ addik r7,r7,-1
+ bneid r7,1b
+ addik r3,r3,1 /* delay slot */
3:
+ addik r3,r7,0
rtsd r15,8
nop
-
+ .size __copy_tofrom_user, . - __copy_tofrom_user
.section __ex_table,"a"
- .word 1b,3b,2b,3b
+ .word 1b,3b,2b,3b,5b,3b,6b,3b
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index d9d249a..7af87f4 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,
regs->esr = error_code;
/* On a kernel SLB miss we can only check for a valid exception entry */
- if (kernel_mode(regs) && (address >= TASK_SIZE)) {
+ if (unlikely(kernel_mode(regs) && (address >= TASK_SIZE))) {
printk(KERN_WARNING "kernel task_size exceed");
_exception(SIGSEGV, regs, code, address);
}
@@ -122,7 +122,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
}
#endif /* CONFIG_KGDB */
- if (in_atomic() || !mm) {
+ if (unlikely(in_atomic() || !mm)) {
if (kernel_mode(regs))
goto bad_area_nosemaphore;
@@ -150,7 +150,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
* source. If this is invalid we can skip the address space check,
* thus avoiding the deadlock.
*/
- if (!down_read_trylock(&mm->mmap_sem)) {
+ if (unlikely(!down_read_trylock(&mm->mmap_sem))) {
if (kernel_mode(regs) && !search_exception_tables(regs->pc))
goto bad_area_nosemaphore;
@@ -158,16 +158,16 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
}
vma = find_vma(mm, address);
- if (!vma)
+ if (unlikely(!vma))
goto bad_area;
if (vma->vm_start <= address)
goto good_area;
- if (!(vma->vm_flags & VM_GROWSDOWN))
+ if (unlikely(!(vma->vm_flags & VM_GROWSDOWN)))
goto bad_area;
- if (!is_write)
+ if (unlikely(!is_write))
goto bad_area;
/*
@@ -179,7 +179,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
* before setting the user r1. Thus we allow the stack to
* expand to 1MB without further checks.
*/
- if (address + 0x100000 < vma->vm_end) {
+ if (unlikely(address + 0x100000 < vma->vm_end)) {
/* get user regs even if this fault is in kernel mode */
struct pt_regs *uregs = current->thread.regs;
@@ -209,15 +209,15 @@ good_area:
code = SEGV_ACCERR;
/* a write */
- if (is_write) {
- if (!(vma->vm_flags & VM_WRITE))
+ if (unlikely(is_write)) {
+ if (unlikely(!(vma->vm_flags & VM_WRITE)))
goto bad_area;
/* a read */
} else {
/* protection fault */
- if (error_code & 0x08000000)
+ if (unlikely(error_code & 0x08000000))
goto bad_area;
- if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
+ if (unlikely(!(vma->vm_flags & (VM_READ | VM_EXEC))))
goto bad_area;
}
@@ -235,7 +235,7 @@ survive:
goto do_sigbus;
BUG();
}
- if (fault & VM_FAULT_MAJOR)
+ if (unlikely(fault & VM_FAULT_MAJOR))
current->maj_flt++;
else
current->min_flt++;
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 77c9e30..f42c2dd 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -166,7 +166,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
for (addr = begin; addr < end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
- memset((void *)addr, 0xcc, PAGE_SIZE);
free_page(addr);
totalram_pages++;
}
@@ -209,14 +208,6 @@ void __init mem_init(void)
}
#ifndef CONFIG_MMU
-/* Check against bounds of physical memory */
-int ___range_ok(unsigned long addr, unsigned long size)
-{
- return ((addr < memory_start) ||
- ((addr + size) > memory_end));
-}
-EXPORT_SYMBOL(___range_ok);
-
int page_is_ram(unsigned long pfn)
{
return __range_ok(pfn, 0);
diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index 63a6fd0..d31312c 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)
err = 0;
set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT,
__pgprot(flags)));
- if (mem_init_done)
+ if (unlikely(mem_init_done))
flush_HPTE(0, va, pmd_val(*pd));
/* flush_HPTE(0, va, pg); */
}
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