From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 include/asm-ppc64/hw_irq.h | 104 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 include/asm-ppc64/hw_irq.h

(limited to 'include/asm-ppc64/hw_irq.h')

diff --git a/include/asm-ppc64/hw_irq.h b/include/asm-ppc64/hw_irq.h
new file mode 100644
index 00000000000..baea40e695e
--- /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__ */
-- 
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