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/*
* linux/include/asm-arm/proc-armo/system.h
*
* Copyright (C) 1995, 1996 Russell King
*/
#ifndef __ASM_PROC_SYSTEM_H
#define __ASM_PROC_SYSTEM_H
#include <asm/proc-fns.h>
extern __inline__ unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
{
extern void __bad_xchg(volatile void *, int);
switch (size) {
case 1: return cpu_xchg_1(x, ptr);
case 4: return cpu_xchg_4(x, ptr);
default: __bad_xchg(ptr, size);
}
return 0;
}
/*
* We need to turn the caches off before calling the reset vector - RiscOS
* messes up if we don't
*/
#define proc_hard_reset() cpu_proc_fin()
/*
* A couple of speedups for the ARM
*/
/*
* Save the current interrupt enable state & disable IRQs
*/
#define __save_flags_cli(x) \
do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ save_flags_cli\n" \
" orr %1, %0, #0x08000000\n" \
" and %0, %0, #0x0c000000\n" \
" teqp %1, #0\n" \
: "=r" (x), "=r" (temp) \
: \
: "memory"); \
} while (0)
/*
* Enable IRQs
*/
#define __sti() \
do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ sti\n" \
" bic %0, %0, #0x08000000\n" \
" teqp %0, #0\n" \
: "=r" (temp) \
: \
: "memory"); \
} while(0)
/*
* Disable IRQs
*/
#define __cli() \
do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ cli\n" \
" orr %0, %0, #0x08000000\n" \
" teqp %0, #0\n" \
: "=r" (temp) \
: \
: "memory"); \
} while(0)
#define __clf() do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ clf\n" \
" orr %0, %0, #0x04000000\n" \
" teqp %0, #0\n" \
: "=r" (temp)); \
} while(0)
#define __stf() do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ stf\n" \
" bic %0, %0, #0x04000000\n" \
" teqp %0, #0\n" \
: "=r" (temp)); \
} while(0)
/*
* save current IRQ & FIQ state
*/
#define __save_flags(x) \
do { \
__asm__ __volatile__( \
" mov %0, pc @ save_flags\n" \
" and %0, %0, #0x0c000000\n" \
: "=r" (x)); \
} while (0)
/*
* restore saved IRQ & FIQ state
*/
#define __restore_flags(x) \
do { \
unsigned long temp; \
__asm__ __volatile__( \
" mov %0, pc @ restore_flags\n" \
" bic %0, %0, #0x0c000000\n" \
" orr %0, %0, %1\n" \
" teqp %0, #0\n" \
: "=&r" (temp) \
: "r" (x) \
: "memory"); \
} while (0)
#endif
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