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 arch_local_save_flags(void) 20 { 21 unsigned long flags; 22 23 asm volatile( 24 "lbz %0,%1(13)" 25 : "=r" (flags) 26 : "i" (offsetof(struct paca_struct, soft_enabled))); 27 28 return flags; 29 } 30 31 static inline unsigned long arch_local_irq_disable(void) 32 { 33 unsigned long flags, zero; 34 35 asm volatile( 36 "li %1,0; lbz %0,%2(13); stb %1,%2(13)" 37 : "=r" (flags), "=&r" (zero) 38 : "i" (offsetof(struct paca_struct, soft_enabled)) 39 : "memory"); 40 41 return flags; 42 } 43 44 extern void arch_local_irq_restore(unsigned long); 45 extern void iseries_handle_interrupts(void); 46 47 static inline void arch_local_irq_enable(void) 48 { 49 arch_local_irq_restore(1); 50 } 51 52 static inline unsigned long arch_local_irq_save(void) 53 { 54 return arch_local_irq_disable(); 55 } 56 57 static inline bool arch_irqs_disabled_flags(unsigned long flags) 58 { 59 return flags == 0; 60 } 61 62 static inline bool arch_irqs_disabled(void) 63 { 64 return arch_irqs_disabled_flags(arch_local_save_flags()); 65 } 66 67 #ifdef CONFIG_PPC_BOOK3E 68 #define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory"); 69 #define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory"); 70 #else 71 #define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1) 72 #define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1) 73 #endif 74 75 #define hard_irq_disable() \ 76 do { \ 77 __hard_irq_disable(); \ 78 get_paca()->soft_enabled = 0; \ 79 get_paca()->hard_enabled = 0; \ 80 } while(0) 81 82 #else /* CONFIG_PPC64 */ 83 84 #define SET_MSR_EE(x) mtmsr(x) 85 86 static inline unsigned long arch_local_save_flags(void) 87 { 88 return mfmsr(); 89 } 90 91 static inline void arch_local_irq_restore(unsigned long flags) 92 { 93 #if defined(CONFIG_BOOKE) 94 asm volatile("wrtee %0" : : "r" (flags) : "memory"); 95 #else 96 mtmsr(flags); 97 #endif 98 } 99 100 static inline unsigned long arch_local_irq_save(void) 101 { 102 unsigned long flags = arch_local_save_flags(); 103 #ifdef CONFIG_BOOKE 104 asm volatile("wrteei 0" : : : "memory"); 105 #else 106 SET_MSR_EE(flags & ~MSR_EE); 107 #endif 108 return flags; 109 } 110 111 static inline void arch_local_irq_disable(void) 112 { 113 #ifdef CONFIG_BOOKE 114 asm volatile("wrteei 0" : : : "memory"); 115 #else 116 arch_local_irq_save(); 117 #endif 118 } 119 120 static inline void arch_local_irq_enable(void) 121 { 122 #ifdef CONFIG_BOOKE 123 asm volatile("wrteei 1" : : : "memory"); 124 #else 125 unsigned long msr = mfmsr(); 126 SET_MSR_EE(msr | MSR_EE); 127 #endif 128 } 129 130 static inline bool arch_irqs_disabled_flags(unsigned long flags) 131 { 132 return (flags & MSR_EE) == 0; 133 } 134 135 static inline bool arch_irqs_disabled(void) 136 { 137 return arch_irqs_disabled_flags(arch_local_save_flags()); 138 } 139 140 #define hard_irq_disable() arch_local_irq_disable() 141 142 #endif /* CONFIG_PPC64 */ 143 144 #define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST 145 146 /* 147 * interrupt-retrigger: should we handle this via lost interrupts and IPIs 148 * or should we not care like we do now ? --BenH. 149 */ 150 struct irq_chip; 151 152 #endif /* __KERNEL__ */ 153 #endif /* _ASM_POWERPC_HW_IRQ_H */ 154