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 #define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1) 53 #define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1) 54 55 #define hard_irq_disable() \ 56 do { \ 57 __hard_irq_disable(); \ 58 get_paca()->soft_enabled = 0; \ 59 get_paca()->hard_enabled = 0; \ 60 } while(0) 61 62 static inline int irqs_disabled_flags(unsigned long flags) 63 { 64 return flags == 0; 65 } 66 67 #else 68 69 #if defined(CONFIG_BOOKE) 70 #define SET_MSR_EE(x) mtmsr(x) 71 #define local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory") 72 #else 73 #define SET_MSR_EE(x) mtmsr(x) 74 #define local_irq_restore(flags) mtmsr(flags) 75 #endif 76 77 static inline void local_irq_disable(void) 78 { 79 #ifdef CONFIG_BOOKE 80 __asm__ __volatile__("wrteei 0": : :"memory"); 81 #else 82 unsigned long msr; 83 __asm__ __volatile__("": : :"memory"); 84 msr = mfmsr(); 85 SET_MSR_EE(msr & ~MSR_EE); 86 #endif 87 } 88 89 static inline void local_irq_enable(void) 90 { 91 #ifdef CONFIG_BOOKE 92 __asm__ __volatile__("wrteei 1": : :"memory"); 93 #else 94 unsigned long msr; 95 __asm__ __volatile__("": : :"memory"); 96 msr = mfmsr(); 97 SET_MSR_EE(msr | MSR_EE); 98 #endif 99 } 100 101 static inline void 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 __asm__ __volatile__("": : :"memory"); 112 } 113 114 #define local_save_flags(flags) ((flags) = mfmsr()) 115 #define local_irq_save(flags) local_irq_save_ptr(&flags) 116 #define irqs_disabled() ((mfmsr() & MSR_EE) == 0) 117 118 #define hard_irq_enable() local_irq_enable() 119 #define hard_irq_disable() local_irq_disable() 120 121 static inline int irqs_disabled_flags(unsigned long flags) 122 { 123 return (flags & MSR_EE) == 0; 124 } 125 126 #endif /* CONFIG_PPC64 */ 127 128 /* 129 * interrupt-retrigger: should we handle this via lost interrupts and IPIs 130 * or should we not care like we do now ? --BenH. 131 */ 132 struct hw_interrupt_type; 133 134 #endif /* __KERNEL__ */ 135 #endif /* _ASM_POWERPC_HW_IRQ_H */ 136