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 static inline int irqs_disabled_flags(unsigned long flags) 68 { 69 return flags == 0; 70 } 71 72 #else 73 74 #if defined(CONFIG_BOOKE) 75 #define SET_MSR_EE(x) mtmsr(x) 76 #define raw_local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory") 77 #else 78 #define SET_MSR_EE(x) mtmsr(x) 79 #define raw_local_irq_restore(flags) mtmsr(flags) 80 #endif 81 82 static inline void raw_local_irq_disable(void) 83 { 84 #ifdef CONFIG_BOOKE 85 __asm__ __volatile__("wrteei 0": : :"memory"); 86 #else 87 unsigned long msr; 88 89 msr = mfmsr(); 90 SET_MSR_EE(msr & ~MSR_EE); 91 #endif 92 } 93 94 static inline void raw_local_irq_enable(void) 95 { 96 #ifdef CONFIG_BOOKE 97 __asm__ __volatile__("wrteei 1": : :"memory"); 98 #else 99 unsigned long msr; 100 101 msr = mfmsr(); 102 SET_MSR_EE(msr | MSR_EE); 103 #endif 104 } 105 106 static inline void raw_local_irq_save_ptr(unsigned long *flags) 107 { 108 unsigned long msr; 109 msr = mfmsr(); 110 *flags = msr; 111 #ifdef CONFIG_BOOKE 112 __asm__ __volatile__("wrteei 0": : :"memory"); 113 #else 114 SET_MSR_EE(msr & ~MSR_EE); 115 #endif 116 } 117 118 #define raw_local_save_flags(flags) ((flags) = mfmsr()) 119 #define raw_local_irq_save(flags) raw_local_irq_save_ptr(&flags) 120 #define raw_irqs_disabled() ((mfmsr() & MSR_EE) == 0) 121 #define raw_irqs_disabled_flags(flags) (((flags) & MSR_EE) == 0) 122 123 #define hard_irq_disable() raw_local_irq_disable() 124 125 static inline int irqs_disabled_flags(unsigned long flags) 126 { 127 return (flags & MSR_EE) == 0; 128 } 129 130 #endif /* CONFIG_PPC64 */ 131 132 /* 133 * interrupt-retrigger: should we handle this via lost interrupts and IPIs 134 * or should we not care like we do now ? --BenH. 135 */ 136 struct irq_chip; 137 138 #ifdef CONFIG_PERF_COUNTERS 139 140 #ifdef CONFIG_PPC64 141 static inline unsigned long test_perf_counter_pending(void) 142 { 143 unsigned long x; 144 145 asm volatile("lbz %0,%1(13)" 146 : "=r" (x) 147 : "i" (offsetof(struct paca_struct, perf_counter_pending))); 148 return x; 149 } 150 151 static inline void set_perf_counter_pending(void) 152 { 153 asm volatile("stb %0,%1(13)" : : 154 "r" (1), 155 "i" (offsetof(struct paca_struct, perf_counter_pending))); 156 } 157 158 static inline void clear_perf_counter_pending(void) 159 { 160 asm volatile("stb %0,%1(13)" : : 161 "r" (0), 162 "i" (offsetof(struct paca_struct, perf_counter_pending))); 163 } 164 #endif /* CONFIG_PPC64 */ 165 166 #else /* CONFIG_PERF_COUNTERS */ 167 168 static inline unsigned long test_perf_counter_pending(void) 169 { 170 return 0; 171 } 172 173 static inline void clear_perf_counter_pending(void) {} 174 #endif /* CONFIG_PERF_COUNTERS */ 175 176 #endif /* __KERNEL__ */ 177 #endif /* _ASM_POWERPC_HW_IRQ_H */ 178