[PATCH] powerpc: merged hw_irq.h
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>
diff --git a/include/asm-ppc64/hw_irq.h b/include/asm-powerpc/hw_irq.h
similarity index 66%
rename from include/asm-ppc64/hw_irq.h
rename to include/asm-powerpc/hw_irq.h
index c483897..605a65e 100644
--- a/include/asm-ppc64/hw_irq.h
+++ b/include/asm-powerpc/hw_irq.h
@@ -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 @@
#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 @@
*/
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 */
diff --git a/include/asm-ppc/hw_irq.h b/include/asm-ppc/hw_irq.h
deleted file mode 100644
index da0fa94..0000000
--- a/include/asm-ppc/hw_irq.h
+++ /dev/null
@@ -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__ */
diff --git a/include/asm-ppc/irq.h b/include/asm-ppc/irq.h
index bd96748..137ea0c 100644
--- a/include/asm-ppc/irq.h
+++ b/include/asm-ppc/irq.h
@@ -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>