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 14extern void timer_interrupt(struct pt_regs *); 15 16#ifdef CONFIG_PPC64 17#include <asm/paca.h> 18 19static 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 30static 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 42extern void raw_local_irq_restore(unsigned long); 43extern 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 77static 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 89static 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 101static 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 120static 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 */ 131struct irq_chip; 132 133#endif /* __KERNEL__ */ 134#endif /* _ASM_POWERPC_HW_IRQ_H */ 135