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/*
* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
*
* Use inline IRQs where possible - Anton Blanchard <anton@au.ibm.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifdef __KERNEL__
#ifndef _PPC64_HW_IRQ_H
#define _PPC64_HW_IRQ_H
#include <linux/config.h>
#include <linux/errno.h>
#include <asm/irq.h>
int timer_interrupt(struct pt_regs *);
extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
#ifdef CONFIG_PPC_ISERIES
extern unsigned long local_get_flags(void);
extern unsigned long local_irq_disable(void);
extern void local_irq_restore(unsigned long);
#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)
#else
#define local_save_flags(flags) ((flags) = mfmsr())
#define local_irq_restore(flags) do { \
__asm__ __volatile__("": : :"memory"); \
__mtmsrd((flags), 1); \
} while(0)
static inline void local_irq_disable(void)
{
unsigned long msr;
msr = mfmsr();
__mtmsrd(msr & ~MSR_EE, 1);
__asm__ __volatile__("": : :"memory");
}
static inline void local_irq_enable(void)
{
unsigned long msr;
__asm__ __volatile__("": : :"memory");
msr = mfmsr();
__mtmsrd(msr | MSR_EE, 1);
}
static inline void __do_save_and_cli(unsigned long *flags)
{
unsigned long msr;
msr = mfmsr();
*flags = msr;
__mtmsrd(msr & ~MSR_EE, 1);
__asm__ __volatile__("": : :"memory");
}
#define local_irq_save(flags) __do_save_and_cli(&flags)
#define irqs_disabled() \
({ \
unsigned long flags; \
local_save_flags(flags); \
!(flags & MSR_EE); \
})
#endif /* CONFIG_PPC_ISERIES */
#define mask_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->handler && desc->handler->disable) \
desc->handler->disable(irq); \
})
#define unmask_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->handler && desc->handler->enable) \
desc->handler->enable(irq); \
})
#define ack_irq(irq) \
({ \
irq_desc_t *desc = get_irq_desc(irq); \
if (desc->handler && desc->handler->ack) \
desc->handler->ack(irq); \
})
/* Should we handle this via lost interrupts and IPIs or should we don't care like
* we do now ? --BenH.
*/
struct hw_interrupt_type;
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
#endif /* _PPC64_HW_IRQ_H */
#endif /* __KERNEL__ */
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