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/*
* linux/include/asm-arm/proc-armv/uaccess.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/arch/memory.h>
#include <asm/proc/domain.h>
/*
* Note that this is actually 0x1,0000,0000
*/
#define KERNEL_DS 0x00000000
#define USER_DS PAGE_OFFSET
static inline void set_fs (mm_segment_t fs)
{
current->addr_limit = fs;
modify_domain(DOMAIN_KERNEL, fs ? DOMAIN_CLIENT : DOMAIN_MANAGER);
}
/* We use 33-bit arithmetic here... */
#define __range_ok(addr,size) ({ \
unsigned long flag, sum; \
__asm__("adds %1, %2, %3; sbcccs %1, %1, %0; movcc %0, #0" \
: "=&r" (flag), "=&r" (sum) \
: "r" (addr), "Ir" (size), "0" (current->addr_limit) \
: "cc"); \
flag; })
#define __addr_ok(addr) ({ \
unsigned long flag; \
__asm__("cmp %2, %0; movlo %0, #0" \
: "=&r" (flag) \
: "0" (current->addr_limit), "r" (addr) \
: "cc"); \
(flag == 0); })
#define __put_user_asm_byte(x,addr,err) \
__asm__ __volatile__( \
"1: strbt %1,[%2],#0\n" \
"2:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"3: mov %0, %3\n" \
" b 2b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 3b\n" \
" .previous" \
: "=r" (err) \
: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err))
#define __put_user_asm_half(x,addr,err) \
({ \
unsigned long __temp = (unsigned long)(x); \
unsigned long __ptr = (unsigned long)(addr); \
__put_user_asm_byte(__temp, __ptr, err); \
__put_user_asm_byte(__temp >> 8, __ptr + 1, err); \
})
#define __put_user_asm_word(x,addr,err) \
__asm__ __volatile__( \
"1: strt %1,[%2],#0\n" \
"2:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"3: mov %0, %3\n" \
" b 2b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 3b\n" \
" .previous" \
: "=r" (err) \
: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err))
#define __get_user_asm_byte(x,addr,err) \
__asm__ __volatile__( \
"1: ldrbt %1,[%2],#0\n" \
"2:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"3: mov %0, %3\n" \
" mov %1, #0\n" \
" b 2b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 3b\n" \
" .previous" \
: "=r" (err), "=&r" (x) \
: "r" (addr), "i" (-EFAULT), "0" (err))
#define __get_user_asm_half(x,addr,err) \
({ \
unsigned long __b1, __b2, __ptr = (unsigned long)addr; \
__get_user_asm_byte(__b1, __ptr, err); \
__get_user_asm_byte(__b2, __ptr + 1, err); \
(x) = __b1 | (__b2 << 8); \
})
#define __get_user_asm_word(x,addr,err) \
__asm__ __volatile__( \
"1: ldrt %1,[%2],#0\n" \
"2:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"3: mov %0, %3\n" \
" mov %1, #0\n" \
" b 2b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 3b\n" \
" .previous" \
: "=r" (err), "=&r" (x) \
: "r" (addr), "i" (-EFAULT), "0" (err))
extern unsigned long __arch_copy_from_user(void *to, const void *from, unsigned long n);
#define __do_copy_from_user(to,from,n) \
(n) = __arch_copy_from_user(to,from,n)
extern unsigned long __arch_copy_to_user(void *to, const void *from, unsigned long n);
#define __do_copy_to_user(to,from,n) \
(n) = __arch_copy_to_user(to,from,n)
extern unsigned long __arch_clear_user(void *addr, unsigned long n);
#define __do_clear_user(addr,sz) \
(sz) = __arch_clear_user(addr,sz)
extern unsigned long __arch_strncpy_from_user(char *to, const char *from, unsigned long count);
#define __do_strncpy_from_user(dst,src,count,res) \
(res) = __arch_strncpy_from_user(dst,src,count)
extern unsigned long __arch_strnlen_user(const char *s, long n);
#define __do_strnlen_user(s,n,res) \
(res) = __arch_strnlen_user(s,n)
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