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