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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | /* * 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); } 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() 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 @ 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) /* * 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) /* For spinlocks etc */ #define local_irq_save(x) __save_flags_cli(x) #define local_irq_restore(x) __restore_flags(x) #define local_irq_disable() __cli() #define local_irq_enable() __sti() #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 |