1 files changed, 135 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
new file mode 100644
index 000000000000..f75a5fc64d2e
--- /dev/null
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -0,0 +1,135 @@
+/*
+ * 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 raw_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 raw_local_irq_restore(unsigned long);
+extern void iseries_handle_interrupts(void);
+
+#define raw_local_irq_enable()          raw_local_irq_restore(1)
+#define raw_local_save_flags(flags)     ((flags) = local_get_flags())
+#define raw_local_irq_save(flags)       ((flags) = raw_local_irq_disable())
+
+#define raw_irqs_disabled()             (local_get_flags() == 0)
+#define raw_irqs_disabled_flags(flags)  ((flags) == 0)
+
+#define __hard_irq_enable()     __mtmsrd(mfmsr() | MSR_EE, 1)
+#define __hard_irq_disable()    __mtmsrd(mfmsr() & ~MSR_EE, 1)
+
+#define  hard_irq_disable()                     \
+        do {                                    \
+                __hard_irq_disable();           \
+                get_paca()->soft_enabled = 0;   \
+                get_paca()->hard_enabled = 0;   \
+        } while(0)
+
+static inline int irqs_disabled_flags(unsigned long flags)
+{
+        return flags == 0;
+}
+
+#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()
+
+static inline int irqs_disabled_flags(unsigned long flags)
+{
+        return (flags & MSR_EE) == 0;
+}
+
+#endif /* CONFIG_PPC64 */
+
+/*
+ * 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 */