1 /* 2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> 3 */ 4 #ifndef _ASM_POWERPC_HW_IRQ_H 5 #define _ASM_POWERPC_HW_IRQ_H 6 7 #ifdef __KERNEL__ 8 9 #include <linux/errno.h> 10 #include <linux/compiler.h> 11 #include <asm/ptrace.h> 12 #include <asm/processor.h> 13 14 extern void timer_interrupt(struct pt_regs *); 15 16 #ifdef CONFIG_PPC64 17 #include <asm/paca.h> 18 19 static inline unsigned long local_get_flags(void) 20 { 21 unsigned long flags; 22 23 __asm__ __volatile__("lbz %0,%1(13)" 24 : "=r" (flags) 25 : "i" (offsetof(struct paca_struct, soft_enabled))); 26 27 return flags; 28 } 29 30 static inline unsigned long raw_local_irq_disable(void) 31 { 32 unsigned long flags, zero; 33 34 __asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)" 35 : "=r" (flags), "=&r" (zero) 36 : "i" (offsetof(struct paca_struct, soft_enabled)) 37 : "memory"); 38 39 return flags; 40 } 41 42 extern void raw_local_irq_restore(unsigned long); 43 extern void iseries_handle_interrupts(void); 44 45 #define raw_local_irq_enable() raw_local_irq_restore(1) 46 #define raw_local_save_flags(flags) ((flags) = local_get_flags()) 47 #define raw_local_irq_save(flags) ((flags) = raw_local_irq_disable()) 48 49 #define raw_irqs_disabled() (local_get_flags() == 0) 50 #define raw_irqs_disabled_flags(flags) ((flags) == 0) 51 52 #ifdef CONFIG_PPC_BOOK3E 53 #define __hard_irq_enable() __asm__ __volatile__("wrteei 1": : :"memory"); 54 #define __hard_irq_disable() __asm__ __volatile__("wrteei 0": : :"memory"); 55 #else 56 #define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1) 57 #define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1) 58 #endif 59 60 #define hard_irq_disable() \ 61 do { \ 62 __hard_irq_disable(); \ 63 get_paca()->soft_enabled = 0; \ 64 get_paca()->hard_enabled = 0; \ 65 } while(0) 66 67 #else 68 69 #if defined(CONFIG_BOOKE) 70 #define SET_MSR_EE(x) mtmsr(x) 71 #define raw_local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory") 72 #else 73 #define SET_MSR_EE(x) mtmsr(x) 74 #define raw_local_irq_restore(flags) mtmsr(flags) 75 #endif 76 77 static inline void raw_local_irq_disable(void) 78 { 79 #ifdef CONFIG_BOOKE 80 __asm__ __volatile__("wrteei 0": : :"memory"); 81 #else 82 unsigned long msr; 83 84 msr = mfmsr(); 85 SET_MSR_EE(msr & ~MSR_EE); 86 #endif 87 } 88 89 static inline void raw_local_irq_enable(void) 90 { 91 #ifdef CONFIG_BOOKE 92 __asm__ __volatile__("wrteei 1": : :"memory"); 93 #else 94 unsigned long msr; 95 96 msr = mfmsr(); 97 SET_MSR_EE(msr | MSR_EE); 98 #endif 99 } 100 101 static inline void raw_local_irq_save_ptr(unsigned long *flags) 102 { 103 unsigned long msr; 104 msr = mfmsr(); 105 *flags = msr; 106 #ifdef CONFIG_BOOKE 107 __asm__ __volatile__("wrteei 0": : :"memory"); 108 #else 109 SET_MSR_EE(msr & ~MSR_EE); 110 #endif 111 } 112 113 #define raw_local_save_flags(flags) ((flags) = mfmsr()) 114 #define raw_local_irq_save(flags) raw_local_irq_save_ptr(&flags) 115 #define raw_irqs_disabled() ((mfmsr() & MSR_EE) == 0) 116 #define raw_irqs_disabled_flags(flags) (((flags) & MSR_EE) == 0) 117 118 #define hard_irq_disable() raw_local_irq_disable() 119 120 static inline int irqs_disabled_flags(unsigned long flags) 121 { 122 return (flags & MSR_EE) == 0; 123 } 124 125 #endif /* CONFIG_PPC64 */ 126 127 /* 128 * interrupt-retrigger: should we handle this via lost interrupts and IPIs 129 * or should we not care like we do now ? --BenH. 130 */ 131 struct irq_chip; 132 133 #ifdef CONFIG_PERF_EVENTS 134 135 #ifdef CONFIG_PPC64 136 static inline unsigned long test_perf_event_pending(void) 137 { 138 unsigned long x; 139 140 asm volatile("lbz %0,%1(13)" 141 : "=r" (x) 142 : "i" (offsetof(struct paca_struct, perf_event_pending))); 143 return x; 144 } 145 146 static inline void set_perf_event_pending(void) 147 { 148 asm volatile("stb %0,%1(13)" : : 149 "r" (1), 150 "i" (offsetof(struct paca_struct, perf_event_pending))); 151 } 152 153 static inline void clear_perf_event_pending(void) 154 { 155 asm volatile("stb %0,%1(13)" : : 156 "r" (0), 157 "i" (offsetof(struct paca_struct, perf_event_pending))); 158 } 159 #endif /* CONFIG_PPC64 */ 160 161 #else /* CONFIG_PERF_EVENTS */ 162 163 static inline unsigned long test_perf_event_pending(void) 164 { 165 return 0; 166 } 167 168 static inline void clear_perf_event_pending(void) {} 169 #endif /* CONFIG_PERF_EVENTS */ 170 171 #endif /* __KERNEL__ */ 172 #endif /* _ASM_POWERPC_HW_IRQ_H */ 173