178 lines
3.9 KiB
C
178 lines
3.9 KiB
C
/*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*/
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#ifndef _ASM_POWERPC_HW_IRQ_H
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#define _ASM_POWERPC_HW_IRQ_H
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#ifdef __KERNEL__
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#include <linux/errno.h>
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#include <linux/compiler.h>
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#include <asm/ptrace.h>
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#include <asm/processor.h>
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extern void timer_interrupt(struct pt_regs *);
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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static inline unsigned long local_get_flags(void)
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{
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unsigned long flags;
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__asm__ __volatile__("lbz %0,%1(13)"
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: "=r" (flags)
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: "i" (offsetof(struct paca_struct, soft_enabled)));
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return flags;
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}
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static inline unsigned long raw_local_irq_disable(void)
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{
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unsigned long flags, zero;
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__asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
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: "=r" (flags), "=&r" (zero)
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: "i" (offsetof(struct paca_struct, soft_enabled))
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: "memory");
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return flags;
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}
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extern void raw_local_irq_restore(unsigned long);
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extern void iseries_handle_interrupts(void);
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#define raw_local_irq_enable() raw_local_irq_restore(1)
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#define raw_local_save_flags(flags) ((flags) = local_get_flags())
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#define raw_local_irq_save(flags) ((flags) = raw_local_irq_disable())
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#define raw_irqs_disabled() (local_get_flags() == 0)
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#define raw_irqs_disabled_flags(flags) ((flags) == 0)
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#ifdef CONFIG_PPC_BOOK3E
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#define __hard_irq_enable() __asm__ __volatile__("wrteei 1": : :"memory");
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#define __hard_irq_disable() __asm__ __volatile__("wrteei 0": : :"memory");
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#else
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#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
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#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)
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#endif
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#define hard_irq_disable() \
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do { \
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__hard_irq_disable(); \
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get_paca()->soft_enabled = 0; \
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get_paca()->hard_enabled = 0; \
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} while(0)
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static inline int irqs_disabled_flags(unsigned long flags)
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{
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return flags == 0;
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}
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#else
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#if defined(CONFIG_BOOKE)
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#define SET_MSR_EE(x) mtmsr(x)
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#define raw_local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
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#else
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#define SET_MSR_EE(x) mtmsr(x)
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#define raw_local_irq_restore(flags) mtmsr(flags)
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#endif
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static inline void raw_local_irq_disable(void)
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{
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#ifdef CONFIG_BOOKE
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__asm__ __volatile__("wrteei 0": : :"memory");
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#else
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unsigned long msr;
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msr = mfmsr();
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SET_MSR_EE(msr & ~MSR_EE);
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#endif
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}
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static inline void raw_local_irq_enable(void)
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{
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#ifdef CONFIG_BOOKE
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__asm__ __volatile__("wrteei 1": : :"memory");
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#else
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unsigned long msr;
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msr = mfmsr();
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SET_MSR_EE(msr | MSR_EE);
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#endif
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}
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static inline void raw_local_irq_save_ptr(unsigned long *flags)
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{
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unsigned long msr;
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msr = mfmsr();
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*flags = msr;
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#ifdef CONFIG_BOOKE
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__asm__ __volatile__("wrteei 0": : :"memory");
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#else
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SET_MSR_EE(msr & ~MSR_EE);
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#endif
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}
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#define raw_local_save_flags(flags) ((flags) = mfmsr())
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#define raw_local_irq_save(flags) raw_local_irq_save_ptr(&flags)
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#define raw_irqs_disabled() ((mfmsr() & MSR_EE) == 0)
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#define raw_irqs_disabled_flags(flags) (((flags) & MSR_EE) == 0)
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#define hard_irq_disable() raw_local_irq_disable()
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static inline int irqs_disabled_flags(unsigned long flags)
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{
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return (flags & MSR_EE) == 0;
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}
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#endif /* CONFIG_PPC64 */
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/*
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* interrupt-retrigger: should we handle this via lost interrupts and IPIs
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* or should we not care like we do now ? --BenH.
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*/
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struct irq_chip;
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#ifdef CONFIG_PERF_EVENTS
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#ifdef CONFIG_PPC64
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static inline unsigned long test_perf_event_pending(void)
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{
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unsigned long x;
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asm volatile("lbz %0,%1(13)"
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: "=r" (x)
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: "i" (offsetof(struct paca_struct, perf_event_pending)));
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return x;
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}
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static inline void set_perf_event_pending(void)
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{
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asm volatile("stb %0,%1(13)" : :
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"r" (1),
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"i" (offsetof(struct paca_struct, perf_event_pending)));
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}
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static inline void clear_perf_event_pending(void)
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{
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asm volatile("stb %0,%1(13)" : :
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"r" (0),
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"i" (offsetof(struct paca_struct, perf_event_pending)));
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}
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#endif /* CONFIG_PPC64 */
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#else /* CONFIG_PERF_EVENTS */
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static inline unsigned long test_perf_event_pending(void)
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{
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return 0;
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}
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static inline void clear_perf_event_pending(void) {}
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#endif /* CONFIG_PERF_EVENTS */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_HW_IRQ_H */
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