initial_commit

1 files changed, 153 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 00000000..bb712c94
--- /dev/null
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -0,0 +1,153 @@
+/*
+ * 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 arch_local_save_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 arch_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 arch_local_irq_restore(unsigned long);
+extern void iseries_handle_interrupts(void);
+
+static inline void arch_local_irq_enable(void)
+{
+	arch_local_irq_restore(1);
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+	return arch_local_irq_disable();
+}
+
+static inline bool arch_irqs_disabled_flags(unsigned long flags)
+{
+	return flags == 0;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#ifdef CONFIG_PPC_BOOK3E
+#define __hard_irq_enable()	asm volatile("wrteei 1" : : : "memory");
+#define __hard_irq_disable()	asm volatile("wrteei 0" : : : "memory");
+#else
+#define __hard_irq_enable()	__mtmsrd(mfmsr() | MSR_EE, 1)
+#define __hard_irq_disable()	__mtmsrd(mfmsr() & ~MSR_EE, 1)
+#endif
+
+#define  hard_irq_disable()			\
+	do {					\
+		__hard_irq_disable();		\
+		get_paca()->soft_enabled = 0;	\
+		get_paca()->hard_enabled = 0;	\
+	} while(0)
+
+#else /* CONFIG_PPC64 */
+
+#define SET_MSR_EE(x)	mtmsr(x)
+
+static inline unsigned long arch_local_save_flags(void)
+{
+	return mfmsr();
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+#if defined(CONFIG_BOOKE)
+	asm volatile("wrtee %0" : : "r" (flags) : "memory");
+#else
+	mtmsr(flags);
+#endif
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+	unsigned long flags = arch_local_save_flags();
+#ifdef CONFIG_BOOKE
+	asm volatile("wrteei 0" : : : "memory");
+#else
+	SET_MSR_EE(flags & ~MSR_EE);
+#endif
+	return flags;
+}
+
+static inline void arch_local_irq_disable(void)
+{
+#ifdef CONFIG_BOOKE
+	asm volatile("wrteei 0" : : : "memory");
+#else
+	arch_local_irq_save();
+#endif
+}
+
+static inline void arch_local_irq_enable(void)
+{
+#ifdef CONFIG_BOOKE
+	asm volatile("wrteei 1" : : : "memory");
+#else
+	unsigned long msr = mfmsr();
+	SET_MSR_EE(msr | MSR_EE);
+#endif
+}
+
+static inline bool arch_irqs_disabled_flags(unsigned long flags)
+{
+	return (flags & MSR_EE) == 0;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#define hard_irq_disable()		arch_local_irq_disable()
+
+#endif /* CONFIG_PPC64 */
+
+#define ARCH_IRQ_INIT_FLAGS	IRQ_NOREQUEST
+
+/*
+ * interrupt-retrigger: should we handle this via lost interrupts and IPIs
+ * or should we not care like we do now ? --BenH.
+ */
+struct irq_chip;
+
+#endif	/* __KERNEL__ */
+#endif	/* _ASM_POWERPC_HW_IRQ_H */