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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /* * linux/include/asm-arm/proc-armo/system.h * * Copyright (C) 1995, 1996 Russell King */ #ifndef __ASM_PROC_SYSTEM_H #define __ASM_PROC_SYSTEM_H extern const char xchg_str[]; #include <asm/proc-fns.h> extern __inline__ unsigned long __xchg(unsigned long x, volatile void *ptr, int size) { switch (size) { case 1: return processor.u.armv2._xchg_1(x, ptr); case 2: return processor.u.armv2._xchg_2(x, ptr); case 4: return processor.u.armv2._xchg_4(x, ptr); default: arm_invalidptr(xchg_str, size); } } /* * We need to turn the caches off before calling the reset vector - RiscOS * messes up if we don't */ #define proc_hard_reset() processor._proc_fin() /* * This processor does not idle */ #define proc_idle() /* * 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\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\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\n" \ " orr %0, %0, #0x08000000\n" \ " teqp %0, #0\n" \ : "=r" (temp) \ : \ : "memory"); \ } while(0) /* * save current IRQ & FIQ state */ #define __save_flags(x) \ do { \ __asm__ __volatile__( \ " mov %0, pc\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\n" \ " bic %0, %0, #0x0c000000\n" \ " orr %0, %0, %1\n" \ " teqp %0, #0\n" \ : "=r" (temp) \ : "r" (x) \ : "memory"); \ } while (0) #ifdef __SMP__ #error SMP not supported #else #define cli() __cli() #define sti() __sti() #define save_flags(x) __save_flags(x) #define restore_flags(x) __restore_flags(x) #define save_flags_cli(x) __save_flags_cli(x) #endif #endif |