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[PATCH] powerpc: merged hw_irq.h

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Merged hw_irq.h between ppc32 & ppc64.  Added support to use the Book-E
wrtee[i] instructions that allow modifying MSR[EE] atomically.
Additionally, added get_irq_desc() macros to ppc32 to allow mask_irq(),
unmask_irq(), and ack_irq() to be common between ppc32 & ppc64.

Note: because 64-bit Book-E implementations only have a 32-bit MSR the
macro's for Book-E need to come before the PPC64 macro's to ensure the
right thing happends for 64-bit Book-E processors.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kumar Gala 2005-09-21 16:52:55 -05:00 committed by Paul Mackerras
parent fa2ac7a25f
commit b671ad2bef
3 changed files with 43 additions and 85 deletions
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63
include/asm-ppc64/hw_irq.h → include/asm-powerpc/hw_irq.h
View file

@ -1,19 +1,15 @@
/*
* 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.
*/
#ifndef _ASM_POWERPC_HW_IRQ_H
#define _ASM_POWERPC_HW_IRQ_H
#ifdef __KERNEL__
#ifndef _PPC64_HW_IRQ_H
#define _PPC64_HW_IRQ_H
#include <linux/config.h>
#include <linux/errno.h>
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/irq.h>
extern void timer_interrupt(struct pt_regs *);
@ -33,45 +29,60 @@ extern void local_irq_restore(unsigned long);
#else
#define local_save_flags(flags) ((flags) = mfmsr())
#if defined(CONFIG_BOOKE)
#define SET_MSR_EE(x) mtmsr(x)
#define local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
#elif defined(__powerpc64__)
#define SET_MSR_EE(x) __mtmsrd(x, 1)
#define local_irq_restore(flags) do { \
__asm__ __volatile__("": : :"memory"); \
__mtmsrd((flags), 1); \
} while(0)
#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;
msr = mfmsr();
__mtmsrd(msr & ~MSR_EE, 1);
__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();
__mtmsrd(msr | MSR_EE, 1);
SET_MSR_EE(msr | MSR_EE);
#endif
}
static inline void __do_save_and_cli(unsigned long *flags)
static inline void local_irq_save_ptr(unsigned long *flags)
{
unsigned long msr;
msr = mfmsr();
*flags = msr;
__mtmsrd(msr & ~MSR_EE, 1);
#ifdef CONFIG_BOOKE
__asm__ __volatile__("wrteei 0": : :"memory");
#else
SET_MSR_EE(msr & ~MSR_EE);
#endif
__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); \
})
#define local_save_flags(flags) ((flags) = mfmsr())
#define local_irq_save(flags) local_irq_save_ptr(&flags)
#define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
#endif /* CONFIG_PPC_ISERIES */
@ -99,6 +110,6 @@ static inline void __do_save_and_cli(unsigned long *flags)
*/
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__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_HW_IRQ_H */

59
include/asm-ppc/hw_irq.h
View file

@ -1,59 +0,0 @@
/*
* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
*/
#ifdef __KERNEL__
#ifndef _PPC_HW_IRQ_H
#define _PPC_HW_IRQ_H
#include <asm/ptrace.h>
#include <asm/reg.h>
#include <asm/irq.h>
extern void timer_interrupt(struct pt_regs *);
#define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
static inline void local_irq_disable(void)
{
unsigned long msr;
msr = mfmsr();
mtmsr(msr & ~MSR_EE);
__asm__ __volatile__("": : :"memory");
}
static inline void local_irq_enable(void)
{
unsigned long msr;
__asm__ __volatile__("": : :"memory");
msr = mfmsr();
mtmsr(msr | MSR_EE);
}
static inline void local_irq_save_ptr(unsigned long *flags)
{
unsigned long msr;
msr = mfmsr();
*flags = msr;
mtmsr(msr & ~MSR_EE);
__asm__ __volatile__("": : :"memory");
}
#define local_save_flags(flags) ((flags) = mfmsr())
#define local_irq_save(flags) local_irq_save_ptr(&flags)
#define local_irq_restore(flags) mtmsr(flags)
extern void do_lost_interrupts(unsigned long);
#define mask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->disable) irq_desc[irq].handler->disable(irq);})
#define unmask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->enable) irq_desc[irq].handler->enable(irq);})
#define ack_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->ack) irq_desc[irq].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 /* _PPC_HW_IRQ_H */
#endif /* __KERNEL__ */

6
include/asm-ppc/irq.h
View file

@ -24,6 +24,12 @@
*/
#define ARCH_HAS_IRQ_PER_CPU
#define get_irq_desc(irq) (&irq_desc[(irq)])
/* Define a way to iterate across irqs. */
#define for_each_irq(i) \
for ((i) = 0; (i) < NR_IRQS; ++(i))
#if defined(CONFIG_40x)
#include <asm/ibm4xx.h>