1 files changed, 104 insertions, 0 deletions

diff --git a/include/asm-ppc64/hw_irq.h b/include/asm-ppc64/hw_irq.h
new file mode 100644
index 000000000000..baea40e695ec
--- /dev/null
+++ b/include/asm-ppc64/hw_irq.h
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ */
+#ifdef __KERNEL__
+#ifndef _PPC64_HW_IRQ_H
+#define _PPC64_HW_IRQ_H
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <asm/irq.h>
+
+int timer_interrupt(struct pt_regs *);
+extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
+
+#ifdef CONFIG_PPC_ISERIES
+
+extern unsigned long local_get_flags(void);
+extern unsigned long local_irq_disable(void);
+extern void local_irq_restore(unsigned long);
+
+#define local_irq_enable()      local_irq_restore(1)
+#define local_save_flags(flags) ((flags) = local_get_flags())
+#define local_irq_save(flags)   ((flags) = local_irq_disable())
+
+#define irqs_disabled()         (local_get_flags() == 0)
+
+#else
+
+#define local_save_flags(flags) ((flags) = mfmsr())
+#define local_irq_restore(flags) do { \
+        __asm__ __volatile__("": : :"memory"); \
+        __mtmsrd((flags), 1); \
+} while(0)
+
+static inline void local_irq_disable(void)
+{
+        unsigned long msr;
+        msr = mfmsr();
+        __mtmsrd(msr & ~MSR_EE, 1);
+        __asm__ __volatile__("": : :"memory");
+}
+
+static inline void local_irq_enable(void)
+{
+        unsigned long msr;
+        __asm__ __volatile__("": : :"memory");
+        msr = mfmsr();
+        __mtmsrd(msr | MSR_EE, 1);
+}
+
+static inline void __do_save_and_cli(unsigned long *flags)
+{
+        unsigned long msr;
+        msr = mfmsr();
+        *flags = msr;
+        __mtmsrd(msr & ~MSR_EE, 1);
+        __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);                      \
+})
+
+#endif /* CONFIG_PPC_ISERIES */
+
+#define mask_irq(irq)                                           \
+        ({                                                      \
+                irq_desc_t *desc = get_irq_desc(irq);           \
+                if (desc->handler && desc->handler->disable)    \
+                        desc->handler->disable(irq);            \
+        })
+#define unmask_irq(irq)                                         \
+        ({                                                      \
+                irq_desc_t *desc = get_irq_desc(irq);           \
+                if (desc->handler && desc->handler->enable)     \
+                        desc->handler->enable(irq);             \
+        })
+#define ack_irq(irq)                                            \
+        ({                                                      \
+                irq_desc_t *desc = get_irq_desc(irq);           \
+                if (desc->handler && desc->handler->ack)        \
+                        desc->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 /* _PPC64_HW_IRQ_H */
+#endif /* __KERNEL__ */