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-rw-r--r--arch/microblaze/include/asm/cache.h2
-rw-r--r--arch/microblaze/include/asm/dma.h6
-rw-r--r--arch/microblaze/include/asm/exceptions.h6
-rw-r--r--arch/microblaze/include/asm/futex.h2
-rw-r--r--arch/microblaze/include/asm/io.h7
-rw-r--r--arch/microblaze/include/asm/page.h12
-rw-r--r--arch/microblaze/include/asm/pci.h8
-rw-r--r--arch/microblaze/include/asm/pgalloc.h16
-rw-r--r--arch/microblaze/include/asm/pgtable.h35
-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
14 files changed, 269 insertions, 330 deletions
diff --git a/arch/microblaze/include/asm/cache.h b/arch/microblaze/include/asm/cache.h
index e52210891d7..4efe96a036f 100644
--- a/arch/microblaze/include/asm/cache.h
+++ b/arch/microblaze/include/asm/cache.h
@@ -15,7 +15,7 @@
#include <asm/registers.h>
-#define L1_CACHE_SHIFT 2
+#define L1_CACHE_SHIFT 5
/* word-granular cache in microblaze */
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
diff --git a/arch/microblaze/include/asm/dma.h b/arch/microblaze/include/asm/dma.h
index 08c073badf1..0d73d0c6de3 100644
--- a/arch/microblaze/include/asm/dma.h
+++ b/arch/microblaze/include/asm/dma.h
@@ -18,4 +18,10 @@
#define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1)
#endif
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy (0)
+#endif
+
#endif /* _ASM_MICROBLAZE_DMA_H */
diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h
index 90731df9e57..4c7b5d037c8 100644
--- a/arch/microblaze/include/asm/exceptions.h
+++ b/arch/microblaze/include/asm/exceptions.h
@@ -64,12 +64,6 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
void die(const char *str, struct pt_regs *fp, long err);
void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
-#ifdef CONFIG_MMU
-void __bug(const char *file, int line, void *data);
-int bad_trap(int trap_num, struct pt_regs *regs);
-int debug_trap(struct pt_regs *regs);
-#endif /* CONFIG_MMU */
-
#if defined(CONFIG_KGDB)
void (*debugger)(struct pt_regs *regs);
int (*debugger_bpt)(struct pt_regs *regs);
diff --git a/arch/microblaze/include/asm/futex.h b/arch/microblaze/include/asm/futex.h
index 8dbb6e7a03a..ad3fd61b2fe 100644
--- a/arch/microblaze/include/asm/futex.h
+++ b/arch/microblaze/include/asm/futex.h
@@ -55,7 +55,7 @@ futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
__futex_atomic_op("or %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
- __futex_atomic_op("and %1,%0,%4;", ret, oldval, uaddr, oparg);
+ __futex_atomic_op("andn %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_XOR:
__futex_atomic_op("xor %1,%0,%4;", ret, oldval, uaddr, oparg);
diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
index 32d621a56ae..00b5398d08c 100644
--- a/arch/microblaze/include/asm/io.h
+++ b/arch/microblaze/include/asm/io.h
@@ -108,6 +108,11 @@ static inline void writel(unsigned int v, volatile void __iomem *addr)
#define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
#define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
+#define ioread16be(addr) __raw_readw((u16 *)(addr))
+#define ioread32be(addr) __raw_readl((u32 *)(addr))
+#define iowrite16be(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
+#define iowrite32be(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
+
/* These are the definitions for the x86 IO instructions
* inb/inw/inl/outb/outw/outl, the "string" versions
* insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
@@ -134,8 +139,6 @@ static inline void writel(unsigned int v, volatile void __iomem *addr)
#ifdef CONFIG_MMU
-#define mm_ptov(addr) ((void *)__phys_to_virt(addr))
-#define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr))
#define phys_to_virt(addr) ((void *)__phys_to_virt(addr))
#define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr))
#define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr))
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
index 2dd1d04129e..de493f86d28 100644
--- a/arch/microblaze/include/asm/page.h
+++ b/arch/microblaze/include/asm/page.h
@@ -31,6 +31,9 @@
#ifndef __ASSEMBLY__
+/* MS be sure that SLAB allocates aligned objects */
+#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
+
#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
@@ -70,14 +73,7 @@ typedef unsigned long pte_basic_t;
#endif /* CONFIG_MMU */
-# ifndef CONFIG_MMU
-# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
-# define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
-# define free_user_page(page, addr) free_page(addr)
-# else /* CONFIG_MMU */
-extern void copy_page(void *to, void *from);
-# endif /* CONFIG_MMU */
-
+# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h
index bdd65aaee30..5a388eeeb28 100644
--- a/arch/microblaze/include/asm/pci.h
+++ b/arch/microblaze/include/asm/pci.h
@@ -94,14 +94,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
#define HAVE_PCI_LEGACY 1
-/* pci_unmap_{page,single} is a nop so... */
-#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
-#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
-#define pci_unmap_addr(PTR, ADDR_NAME) (0)
-#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
-#define pci_unmap_len(PTR, LEN_NAME) (0)
-#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
-
/* The PCI address space does equal the physical memory
* address space (no IOMMU). The IDE and SCSI device layers use
* this boolean for bounce buffer decisions.
diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h
index f44b0d696fe..c614a893f8a 100644
--- a/arch/microblaze/include/asm/pgalloc.h
+++ b/arch/microblaze/include/asm/pgalloc.h
@@ -108,21 +108,7 @@ extern inline void free_pgd_slow(pgd_t *pgd)
#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
- unsigned long address)
-{
- pte_t *pte;
- extern void *early_get_page(void);
- if (mem_init_done) {
- pte = (pte_t *)__get_free_page(GFP_KERNEL |
- __GFP_REPEAT | __GFP_ZERO);
- } else {
- pte = (pte_t *)early_get_page();
- if (pte)
- clear_page(pte);
- }
- return pte;
-}
+extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index dd2bb60651c..ca2d9287154 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -512,15 +512,6 @@ static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
/*
- * When flushing the tlb entry for a page, we also need to flush the hash
- * table entry. flush_hash_page is assembler (for speed) in hashtable.S.
- */
-extern int flush_hash_page(unsigned context, unsigned long va, pte_t *ptep);
-
-/* Add an HPTE to the hash table */
-extern void add_hash_page(unsigned context, unsigned long va, pte_t *ptep);
-
-/*
* Encode and decode a swap entry.
* Note that the bits we use in a PTE for representing a swap entry
* must not include the _PAGE_PRESENT bit, or the _PAGE_HASHPTE bit
@@ -533,15 +524,7 @@ extern void add_hash_page(unsigned context, unsigned long va, pte_t *ptep);
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 2 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 2 })
-
-/* CONFIG_APUS */
-/* For virtual address to physical address conversion */
-extern void cache_clear(__u32 addr, int length);
-extern void cache_push(__u32 addr, int length);
-extern int mm_end_of_chunk(unsigned long addr, int len);
extern unsigned long iopa(unsigned long addr);
-/* extern unsigned long mm_ptov(unsigned long addr) \
- __attribute__ ((const)); TBD */
/* Values for nocacheflag and cmode */
/* These are not used by the APUS kernel_map, but prevents
@@ -552,18 +535,6 @@ extern unsigned long iopa(unsigned long addr);
#define IOMAP_NOCACHE_NONSER 2
#define IOMAP_NO_COPYBACK 3
-/*
- * Map some physical address range into the kernel address space.
- */
-extern unsigned long kernel_map(unsigned long paddr, unsigned long size,
- int nocacheflag, unsigned long *memavailp);
-
-/*
- * Set cache mode of (kernel space) address range.
- */
-extern void kernel_set_cachemode(unsigned long address, unsigned long size,
- unsigned int cmode);
-
/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define kern_addr_valid(addr) (1)
@@ -577,10 +548,6 @@ extern void kernel_set_cachemode(unsigned long address, unsigned long size,
void do_page_fault(struct pt_regs *regs, unsigned long address,
unsigned long error_code);
-void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
- unsigned int size, int flags);
-
-void __init adjust_total_lowmem(void);
void mapin_ram(void);
int map_page(unsigned long va, phys_addr_t pa, int flags);
@@ -601,7 +568,7 @@ void __init *early_get_page(void);
extern unsigned long ioremap_bot, ioremap_base;
void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle);
-void consistent_free(void *vaddr);
+void consistent_free(size_t size, void *vaddr);
void consistent_sync(void *vaddr, size_t size, int direction);
void consistent_sync_page(struct page *page, unsigned long offset,
size_t size, int direction);
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 563c6b9453f..8eeb09211ec 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 0e7102c3fb1..00000000000
--- 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 6e92885d381..b2ca80f6464 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 bcb8b41d55a..2e1353c2d18 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 371bd6e56d9..446bec29b14 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__ */