1 files changed, 74 insertions, 0 deletions
diff --git a/include/asm-ppc/hw_irq.h b/include/asm-ppc/hw_irq.h
new file mode 100644
index 000000000000..47dc7990fb26
--- /dev/null
+++ b/include/asm-ppc/hw_irq.h
@@ -0,0 +1,74 @@
+/*
+ * 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>
+
+extern void timer_interrupt(struct pt_regs *);
+
+#define INLINE_IRQS
+
+#define irqs_disabled()	((mfmsr() & MSR_EE) == 0)
+
+#ifdef INLINE_IRQS
+
+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)
+
+#else
+
+extern void local_irq_enable(void);
+extern void local_irq_disable(void);
+extern void local_irq_restore(unsigned long);
+extern void local_save_flags_ptr(unsigned long *);
+
+#define local_save_flags(flags) local_save_flags_ptr(&flags)
+#define local_irq_save(flags) ({local_save_flags(flags);local_irq_disable();})
+
+#endif
+
+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__ */