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/*
* linux/include/asm-arm/proc-armv/uaccess.h
*/
/*
* The fs functions are implemented on the ARMV3 and V4 architectures
* using the domain register.
*
* DOMAIN_IO - domain 2 includes all IO only
* DOMAIN_KERNEL - domain 1 includes all kernel memory only
* DOMAIN_USER - domain 0 includes all user memory only
*/
#include <asm/hardware.h>
#define DOMAIN_CLIENT 1
#define DOMAIN_MANAGER 3
#define DOMAIN_USER_CLIENT ((DOMAIN_CLIENT) << 0)
#define DOMAIN_USER_MANAGER ((DOMAIN_MANAGER) << 0)
#define DOMAIN_KERNEL_CLIENT ((DOMAIN_CLIENT) << 2)
#define DOMAIN_KERNEL_MANAGER ((DOMAIN_MANAGER) << 2)
#define DOMAIN_IO_CLIENT ((DOMAIN_CLIENT) << 4)
#define DOMAIN_IO_MANAGER ((DOMAIN_MANAGER) << 4)
/*
* When we want to access kernel memory in the *_user functions,
* we change the domain register to KERNEL_DS, thus allowing
* unrestricted access
*/
#define KERNEL_DOMAIN (DOMAIN_USER_CLIENT | DOMAIN_KERNEL_MANAGER | DOMAIN_IO_CLIENT)
#define USER_DOMAIN (DOMAIN_USER_CLIENT | DOMAIN_KERNEL_CLIENT | DOMAIN_IO_CLIENT)
/*
* Note that this is actually 0x1,0000,0000
*/
#define KERNEL_DS 0x00000000
#define USER_DS PAGE_OFFSET
#define get_ds() (KERNEL_DS)
#define get_fs() (current->addr_limit)
#define segment_eq(a,b) ((a) == (b))
extern __inline__ void set_fs (mm_segment_t fs)
{
current->addr_limit = fs;
__asm__ __volatile__("mcr p15, 0, %0, c3, c0" :
: "r" (fs ? USER_DOMAIN : KERNEL_DOMAIN));
}
/* We use 33-bit arithmetic here... */
#define __range_ok(addr,size) ({ \
unsigned long flag, sum; \
__asm__ __volatile__("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__ __volatile__("cmp %2, %0; movlo %0, #0" \
: "=&r" (flag) \
: "0" (current->addr_limit), "r" (addr) \
: "cc"); \
(flag == 0); })
#define access_ok(type,addr,size) (__range_ok(addr,size) == 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: mvn %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); \
__asm__ __volatile__( \
"1: strbt %1,[%3],#0\n" \
"2: strbt %2,[%4],#0\n" \
"3:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"4: mvn %0, %5\n" \
" b 3b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 4b\n" \
" .long 2b, 4b\n" \
" .previous" \
: "=r" (err) \
: "r" (__temp), "r" (__temp >> 8), \
"r" (addr), "r" ((int)(addr) + 1), \
"i" (EFAULT), "0" (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: mvn %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: mvn %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 __temp; \
__asm__ __volatile__( \
"1: ldrbt %1,[%3],#0\n" \
"2: ldrbt %2,[%4],#0\n" \
" orr %1, %1, %2, lsl #8\n" \
"3:\n" \
" .section .fixup,\"ax\"\n" \
" .align 2\n" \
"4: mvn %0, %5\n" \
" mov %1, #0\n" \
" b 3b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 4b\n" \
" .long 2b, 4b\n" \
" .previous" \
: "=r" (err), "=r" (x), "=&r" (__temp) \
: "r" (addr), "r" ((int)(addr) + 1), \
"i" (EFAULT), "0" (err)); \
})
#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: mvn %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_strlen_user(const char *s);
#define __do_strlen_user(s,res) \
(res) = __arch_strlen_user(s)
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