| /* |
| * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> |
| */ |
| #ifndef _ASM_POWERPC_HW_IRQ_H |
| #define _ASM_POWERPC_HW_IRQ_H |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/errno.h> |
| #include <linux/compiler.h> |
| #include <asm/ptrace.h> |
| #include <asm/processor.h> |
| |
| #ifdef CONFIG_PPC64 |
| |
| /* |
| * PACA flags in paca->irq_happened. |
| * |
| * This bits are set when interrupts occur while soft-disabled |
| * and allow a proper replay. Additionally, PACA_IRQ_HARD_DIS |
| * is set whenever we manually hard disable. |
| */ |
| #define PACA_IRQ_HARD_DIS 0x01 |
| #define PACA_IRQ_DBELL 0x02 |
| #define PACA_IRQ_EE 0x04 |
| #define PACA_IRQ_DEC 0x08 /* Or FIT */ |
| #define PACA_IRQ_EE_EDGE 0x10 /* BookE only */ |
| |
| #endif /* CONFIG_PPC64 */ |
| |
| #ifndef __ASSEMBLY__ |
| |
| extern void __replay_interrupt(unsigned int vector); |
| |
| extern void timer_interrupt(struct pt_regs *); |
| extern void performance_monitor_exception(struct pt_regs *regs); |
| extern void WatchdogException(struct pt_regs *regs); |
| extern void unknown_exception(struct pt_regs *regs); |
| |
| #ifdef CONFIG_PPC64 |
| #include <asm/paca.h> |
| |
| static inline unsigned long arch_local_save_flags(void) |
| { |
| unsigned long flags; |
| |
| asm volatile( |
| "lbz %0,%1(13)" |
| : "=r" (flags) |
| : "i" (offsetof(struct paca_struct, soft_enabled))); |
| |
| return flags; |
| } |
| |
| static inline unsigned long arch_local_irq_disable(void) |
| { |
| unsigned long flags, zero; |
| |
| asm volatile( |
| "li %1,0; lbz %0,%2(13); stb %1,%2(13)" |
| : "=r" (flags), "=&r" (zero) |
| : "i" (offsetof(struct paca_struct, soft_enabled)) |
| : "memory"); |
| |
| return flags; |
| } |
| |
| extern void arch_local_irq_restore(unsigned long); |
| |
| static inline void arch_local_irq_enable(void) |
| { |
| arch_local_irq_restore(1); |
| } |
| |
| static inline unsigned long arch_local_irq_save(void) |
| { |
| return arch_local_irq_disable(); |
| } |
| |
| static inline bool arch_irqs_disabled_flags(unsigned long flags) |
| { |
| return flags == 0; |
| } |
| |
| static inline bool arch_irqs_disabled(void) |
| { |
| return arch_irqs_disabled_flags(arch_local_save_flags()); |
| } |
| |
| #ifdef CONFIG_PPC_BOOK3E |
| #define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory") |
| #define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory") |
| #else |
| #define __hard_irq_enable() __mtmsrd(local_paca->kernel_msr | MSR_EE, 1) |
| #define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1) |
| #endif |
| |
| static inline void hard_irq_disable(void) |
| { |
| __hard_irq_disable(); |
| get_paca()->soft_enabled = 0; |
| get_paca()->irq_happened |= PACA_IRQ_HARD_DIS; |
| } |
| |
| /* include/linux/interrupt.h needs hard_irq_disable to be a macro */ |
| #define hard_irq_disable hard_irq_disable |
| |
| static inline bool lazy_irq_pending(void) |
| { |
| return !!(get_paca()->irq_happened & ~PACA_IRQ_HARD_DIS); |
| } |
| |
| /* |
| * This is called by asynchronous interrupts to conditionally |
| * re-enable hard interrupts when soft-disabled after having |
| * cleared the source of the interrupt |
| */ |
| static inline void may_hard_irq_enable(void) |
| { |
| get_paca()->irq_happened &= ~PACA_IRQ_HARD_DIS; |
| if (!(get_paca()->irq_happened & PACA_IRQ_EE)) |
| __hard_irq_enable(); |
| } |
| |
| static inline bool arch_irq_disabled_regs(struct pt_regs *regs) |
| { |
| return !regs->softe; |
| } |
| |
| extern bool prep_irq_for_idle(void); |
| |
| #else /* CONFIG_PPC64 */ |
| |
| #define SET_MSR_EE(x) mtmsr(x) |
| |
| static inline unsigned long arch_local_save_flags(void) |
| { |
| return mfmsr(); |
| } |
| |
| static inline void arch_local_irq_restore(unsigned long flags) |
| { |
| #if defined(CONFIG_BOOKE) |
| asm volatile("wrtee %0" : : "r" (flags) : "memory"); |
| #else |
| mtmsr(flags); |
| #endif |
| } |
| |
| static inline unsigned long arch_local_irq_save(void) |
| { |
| unsigned long flags = arch_local_save_flags(); |
| #ifdef CONFIG_BOOKE |
| asm volatile("wrteei 0" : : : "memory"); |
| #else |
| SET_MSR_EE(flags & ~MSR_EE); |
| #endif |
| return flags; |
| } |
| |
| static inline void arch_local_irq_disable(void) |
| { |
| #ifdef CONFIG_BOOKE |
| asm volatile("wrteei 0" : : : "memory"); |
| #else |
| arch_local_irq_save(); |
| #endif |
| } |
| |
| static inline void arch_local_irq_enable(void) |
| { |
| #ifdef CONFIG_BOOKE |
| asm volatile("wrteei 1" : : : "memory"); |
| #else |
| unsigned long msr = mfmsr(); |
| SET_MSR_EE(msr | MSR_EE); |
| #endif |
| } |
| |
| static inline bool arch_irqs_disabled_flags(unsigned long flags) |
| { |
| return (flags & MSR_EE) == 0; |
| } |
| |
| static inline bool arch_irqs_disabled(void) |
| { |
| return arch_irqs_disabled_flags(arch_local_save_flags()); |
| } |
| |
| #define hard_irq_disable() arch_local_irq_disable() |
| |
| static inline bool arch_irq_disabled_regs(struct pt_regs *regs) |
| { |
| return !(regs->msr & MSR_EE); |
| } |
| |
| static inline void may_hard_irq_enable(void) { } |
| |
| #endif /* CONFIG_PPC64 */ |
| |
| #define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST |
| |
| /* |
| * interrupt-retrigger: should we handle this via lost interrupts and IPIs |
| * or should we not care like we do now ? --BenH. |
| */ |
| struct irq_chip; |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_HW_IRQ_H */ |