/* * Copyright 2004-2009 Analog Devices Inc. * * Licensed under the GPL-2 or later. * * Based on: include/asm-m68knommu/uaccess.h */ #ifndef __BLACKFIN_UACCESS_H #define __BLACKFIN_UACCESS_H /* * User space memory access functions */ #include <linux/mm.h> #include <linux/string.h> #include <asm/segment.h> #include <asm/sections.h> #define get_ds() (KERNEL_DS) #define get_fs() (current_thread_info()->addr_limit) static inline void set_fs(mm_segment_t fs) { current_thread_info()->addr_limit = fs; } #define segment_eq(a, b) ((a) == (b)) #define access_ok(type, addr, size) _access_ok((unsigned long)(addr), (size)) /* * 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. */ #ifndef CONFIG_ACCESS_CHECK static inline int _access_ok(unsigned long addr, unsigned long size) { return 1; } #else extern int _access_ok(unsigned long addr, unsigned long size); #endif #include <asm/extable.h> /* * These are the main single-value transfer routines. They automatically * use the right size if we just have the right pointer type. */ #define put_user(x, p) \ ({ \ int _err = 0; \ typeof(*(p)) _x = (x); \ typeof(*(p)) __user *_p = (p); \ if (!access_ok(VERIFY_WRITE, _p, sizeof(*(_p)))) {\ _err = -EFAULT; \ } \ else { \ switch (sizeof (*(_p))) { \ case 1: \ __put_user_asm(_x, _p, B); \ break; \ case 2: \ __put_user_asm(_x, _p, W); \ break; \ case 4: \ __put_user_asm(_x, _p, ); \ break; \ case 8: { \ long _xl, _xh; \ _xl = ((__force long *)&_x)[0]; \ _xh = ((__force long *)&_x)[1]; \ __put_user_asm(_xl, ((__force long __user *)_p)+0, );\ __put_user_asm(_xh, ((__force long __user *)_p)+1, );\ } break; \ default: \ _err = __put_user_bad(); \ break; \ } \ } \ _err; \ }) #define __put_user(x, p) put_user(x, p) static inline int bad_user_access_length(void) { panic("bad_user_access_length"); return -1; } #define __put_user_bad() (printk(KERN_INFO "put_user_bad %s:%d %s\n",\ __FILE__, __LINE__, __func__),\ bad_user_access_length(), (-EFAULT)) /* * Tell gcc we read from memory instead of writing: this is because * we do not write to any memory gcc knows about, so there are no * aliasing issues. */ #define __ptr(x) ((unsigned long __force *)(x)) #define __put_user_asm(x, p, bhw) \ __asm__ (#bhw"[%1] = %0;\n\t" \ : /* no outputs */ \ :"d" (x), "a" (__ptr(p)) : "memory") #define get_user(x, ptr) \ ({ \ int _err = 0; \ unsigned long _val = 0; \ const typeof(*(ptr)) __user *_p = (ptr); \ const size_t ptr_size = sizeof(*(_p)); \ if (likely(access_ok(VERIFY_READ, _p, ptr_size))) { \ BUILD_BUG_ON(ptr_size >= 8); \ switch (ptr_size) { \ case 1: \ __get_user_asm(_val, _p, B, (Z)); \ break; \ case 2: \ __get_user_asm(_val, _p, W, (Z)); \ break; \ case 4: \ __get_user_asm(_val, _p, , ); \ break; \ } \ } else \ _err = -EFAULT; \ x = (__force typeof(*(ptr)))_val; \ _err; \ }) #define __get_user(x, p) get_user(x, p) #define __get_user_bad() (bad_user_access_length(), (-EFAULT)) #define __get_user_asm(x, ptr, bhw, option) \ ({ \ __asm__ __volatile__ ( \ "%0 =" #bhw "[%1]" #option ";" \ : "=d" (x) \ : "a" (__ptr(ptr))); \ }) static inline unsigned long __must_check raw_copy_from_user(void *to, const void __user *from, unsigned long n) { memcpy(to, (const void __force *)from, n); return 0; } static inline unsigned long __must_check raw_copy_to_user(void __user *to, const void *from, unsigned long n) { memcpy((void __force *)to, from, n); SSYNC(); return 0; } #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER /* * Copy a null terminated string from userspace. */ static inline long __must_check strncpy_from_user(char *dst, const char __user *src, long count) { char *tmp; if (!access_ok(VERIFY_READ, src, 1)) return -EFAULT; strncpy(dst, (const char __force *)src, count); for (tmp = dst; *tmp && count > 0; tmp++, count--) ; return (tmp - dst); } /* * Get the size of a string in user space. * src: The string to measure * n: The maximum valid length * * Get the size of a NUL-terminated string in user space. * * Returns the size of the string INCLUDING the terminating NUL. * On exception, returns 0. * If the string is too long, returns a value greater than n. */ static inline long __must_check strnlen_user(const char __user *src, long n) { if (!access_ok(VERIFY_READ, src, 1)) return 0; return strnlen((const char __force *)src, n) + 1; } /* * Zero Userspace */ static inline unsigned long __must_check __clear_user(void __user *to, unsigned long n) { if (!access_ok(VERIFY_WRITE, to, n)) return n; memset((void __force *)to, 0, n); return 0; } #define clear_user(to, n) __clear_user(to, n) /* How to interpret these return values: * CORE: can be accessed by core load or dma memcpy * CORE_ONLY: can only be accessed by core load * DMA: can only be accessed by dma memcpy * IDMA: can only be accessed by interprocessor dma memcpy (BF561) * ITEST: can be accessed by isram memcpy or dma memcpy */ enum { BFIN_MEM_ACCESS_CORE = 0, BFIN_MEM_ACCESS_CORE_ONLY, BFIN_MEM_ACCESS_DMA, BFIN_MEM_ACCESS_IDMA, BFIN_MEM_ACCESS_ITEST, }; /** * bfin_mem_access_type() - what kind of memory access is required * @addr: the address to check * @size: number of bytes needed * @return: <0 is error, >=0 is BFIN_MEM_ACCESS_xxx enum (see above) */ int bfin_mem_access_type(unsigned long addr, unsigned long size); #endif /* _BLACKFIN_UACCESS_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 658 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 1.55 KB | 0644 |
|
barrier.h | File | 2.55 KB | 0644 |
|
bfin-global.h | File | 2.8 KB | 0644 |
|
bfin-lq035q1.h | File | 868 B | 0644 |
|
bfin5xx_spi.h | File | 2.07 KB | 0644 |
|
bfin_can.h | File | 36.04 KB | 0644 |
|
bfin_dma.h | File | 5.46 KB | 0644 |
|
bfin_pfmon.h | File | 1.11 KB | 0644 |
|
bfin_ppi.h | File | 9.01 KB | 0644 |
|
bfin_sdh.h | File | 7.2 KB | 0644 |
|
bfin_serial.h | File | 17.02 KB | 0644 |
|
bfin_simple_timer.h | File | 949 B | 0644 |
|
bfin_sport.h | File | 1.21 KB | 0644 |
|
bfin_sport3.h | File | 5.47 KB | 0644 |
|
bfin_twi.h | File | 6.25 KB | 0644 |
|
bfin_watchdog.h | File | 696 B | 0644 |
|
bfrom.h | File | 3.36 KB | 0644 |
|
bitops.h | File | 3.45 KB | 0644 |
|
blackfin.h | File | 1.55 KB | 0644 |
|
bug.h | File | 1.49 KB | 0644 |
|
cache.h | File | 1.47 KB | 0644 |
|
cacheflush.h | File | 3.79 KB | 0644 |
|
cdef_LPBlackfin.h | File | 18.93 KB | 0644 |
|
checksum.h | File | 899 B | 0644 |
|
clkdev.h | File | 318 B | 0644 |
|
clocks.h | File | 1.66 KB | 0644 |
|
cmpxchg.h | File | 3.2 KB | 0644 |
|
context.S | File | 5.92 KB | 0644 |
|
cplb.h | File | 4.86 KB | 0644 |
|
cplbinit.h | File | 1.6 KB | 0644 |
|
cpu.h | File | 443 B | 0644 |
|
def_LPBlackfin.h | File | 28.6 KB | 0644 |
|
delay.h | File | 917 B | 0644 |
|
dma-mapping.h | File | 1.09 KB | 0644 |
|
dma.h | File | 9.28 KB | 0644 |
|
dpmc.h | File | 18.24 KB | 0644 |
|
early_printk.h | File | 1.09 KB | 0644 |
|
elf.h | File | 4.88 KB | 0644 |
|
entry.h | File | 5.27 KB | 0644 |
|
exec.h | File | 37 B | 0644 |
|
fixed_code.h | File | 806 B | 0644 |
|
flat.h | File | 1.41 KB | 0644 |
|
ftrace.h | File | 1.37 KB | 0644 |
|
gpio.h | File | 5.91 KB | 0644 |
|
gptimers.h | File | 8.95 KB | 0644 |
|
hardirq.h | File | 301 B | 0644 |
|
io.h | File | 1.52 KB | 0644 |
|
ipipe.h | File | 5.81 KB | 0644 |
|
ipipe_base.h | File | 2.38 KB | 0644 |
|
irq.h | File | 879 B | 0644 |
|
irq_handler.h | File | 1.93 KB | 0644 |
|
irqflags.h | File | 7.13 KB | 0644 |
|
kgdb.h | File | 3.23 KB | 0644 |
|
l1layout.h | File | 879 B | 0644 |
|
linkage.h | File | 205 B | 0644 |
|
mem_init.h | File | 13.1 KB | 0644 |
|
mem_map.h | File | 1.73 KB | 0644 |
|
mmu.h | File | 713 B | 0644 |
|
mmu_context.h | File | 5.35 KB | 0644 |
|
module.h | File | 410 B | 0644 |
|
nand.h | File | 895 B | 0644 |
|
nmi.h | File | 195 B | 0644 |
|
page.h | File | 546 B | 0644 |
|
page_offset.h | File | 192 B | 0644 |
|
pci.h | File | 310 B | 0644 |
|
pda.h | File | 1.86 KB | 0644 |
|
perf_event.h | File | 23 B | 0644 |
|
pgtable.h | File | 3 KB | 0644 |
|
pm.h | File | 590 B | 0644 |
|
portmux.h | File | 16.38 KB | 0644 |
|
processor.h | File | 3.21 KB | 0644 |
|
pseudo_instructions.h | File | 391 B | 0644 |
|
ptrace.h | File | 1.19 KB | 0644 |
|
reboot.h | File | 446 B | 0644 |
|
rwlock.h | File | 142 B | 0644 |
|
scb.h | File | 445 B | 0644 |
|
sections.h | File | 2 KB | 0644 |
|
segment.h | File | 226 B | 0644 |
|
smp.h | File | 1.34 KB | 0644 |
|
spinlock.h | File | 1.87 KB | 0644 |
|
spinlock_types.h | File | 495 B | 0644 |
|
string.h | File | 1.04 KB | 0644 |
|
switch_to.h | File | 997 B | 0644 |
|
syscall.h | File | 2.15 KB | 0644 |
|
thread_info.h | File | 2.66 KB | 0644 |
|
time.h | File | 1.33 KB | 0644 |
|
timex.h | File | 477 B | 0644 |
|
tlb.h | File | 481 B | 0644 |
|
tlbflush.h | File | 88 B | 0644 |
|
trace.h | File | 2.67 KB | 0644 |
|
traps.h | File | 4.87 KB | 0644 |
|
uaccess.h | File | 5.79 KB | 0644 |
|
unistd.h | File | 523 B | 0644 |
|
vga.h | File | 29 B | 0644 |
|