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/*
* 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>
extern void timer_interrupt(struct pt_regs *);
#ifdef CONFIG_PPC64
#include <asm/paca.h>
static inline unsigned long local_get_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 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 local_irq_restore(unsigned long);
extern void iseries_handle_interrupts(void);
#define local_irq_enable() local_irq_restore(1)
#define local_save_flags(flags) ((flags) = local_get_flags())
#define local_irq_save(flags) ((flags) = local_irq_disable())
#define irqs_disabled() (local_get_flags() == 0)
#define hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
#define hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)
#else
#if defined(CONFIG_BOOKE)
#define SET_MSR_EE(x) mtmsr(x)
#define local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
#else
#define SET_MSR_EE(x) mtmsr(x)
#define local_irq_restore(flags) mtmsr(flags)
#endif
static inline void local_irq_disable(void)
{
#ifdef CONFIG_BOOKE
__asm__ __volatile__("wrteei 0": : :"memory");
#else
unsigned long msr;
__asm__ __volatile__("": : :"memory");
msr = mfmsr();
SET_MSR_EE(msr & ~MSR_EE);
#endif
}
static inline void local_irq_enable(void)
{
#ifdef CONFIG_BOOKE
__asm__ __volatile__("wrteei 1": : :"memory");
#else
unsigned long msr;
__asm__ __volatile__("": : :"memory");
msr = mfmsr();
SET_MSR_EE(msr | MSR_EE);
#endif
}
static inline void local_irq_save_ptr(unsigned long *flags)
{
unsigned long msr;
msr = mfmsr();
*flags = msr;
#ifdef CONFIG_BOOKE
__asm__ __volatile__("wrteei 0": : :"memory");
#else
SET_MSR_EE(msr & ~MSR_EE);
#endif
__asm__ __volatile__("": : :"memory");
}
#define local_save_flags(flags) ((flags) = mfmsr())
#define local_irq_save(flags) local_irq_save_ptr(&flags)
#define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
#define hard_irq_enable() local_irq_enable()
#define hard_irq_disable() local_irq_disable()
#endif /* CONFIG_PPC64 */
#define mask_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->chip && desc->chip->disable) \
desc->chip->disable(irq); \
})
#define unmask_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->chip && desc->chip->enable) \
desc->chip->enable(irq); \
})
#define ack_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->chip && desc->chip->ack) \
desc->chip->ack(irq); \
})
/*
* interrupt-retrigger: should we handle this via lost interrupts and IPIs
* or should we not care like we do now ? --BenH.
*/
struct hw_interrupt_type;
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_HW_IRQ_H */
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