From c7fc24dc4420057f103afe8fc64524ebc25c5d37 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 25 Aug 1998 09:12:35 +0000
Subject:  o Merge with Linux 2.1.116.  o New Newport console code.  o New G364
 console code.

---
 arch/i386/kernel/irq.h | 64 ++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 52 insertions(+), 12 deletions(-)

(limited to 'arch/i386/kernel/irq.h')

diff --git a/arch/i386/kernel/irq.h b/arch/i386/kernel/irq.h
index a769369c2..fedfdbc97 100644
--- a/arch/i386/kernel/irq.h
+++ b/arch/i386/kernel/irq.h
@@ -1,6 +1,52 @@
 #ifndef __irq_h
 #define __irq_h
 
+#include <asm/irq.h>
+
+/*
+ * Interrupt controller descriptor. This is all we need
+ * to describe about the low-level hardware.
+ */
+struct hw_interrupt_type {
+	const char * typename;
+	void (*handle)(unsigned int irq, int cpu, struct pt_regs * regs);
+	void (*enable)(unsigned int irq);
+	void (*disable)(unsigned int irq);
+};
+
+
+/*
+ * Status: reason for being disabled: somebody has
+ * done a "disable_irq()" or we must not re-enter the
+ * already executing irq..
+ */
+#define IRQ_INPROGRESS	1
+#define IRQ_DISABLED	2
+
+/*
+ * This is the "IRQ descriptor", which contains various information
+ * about the irq, including what kind of hardware handling it has,
+ * whether it is disabled etc etc.
+ *
+ * Pad this out to 32 bytes for cache and indexing reasons.
+ */
+typedef struct {
+	unsigned int status;			/* IRQ status - IRQ_INPROGRESS, IRQ_DISABLED */
+	unsigned int events;			/* Do we have any pending events? */
+	unsigned int ipi;			/* Have we sent off the pending IPI? */
+	struct hw_interrupt_type *handler;	/* handle/enable/disable functions */
+	struct irqaction *action;		/* IRQ action list */
+	unsigned int unused[3];
+} irq_desc_t;
+
+#define IRQ0_TRAP_VECTOR 0x51
+
+extern irq_desc_t irq_desc[NR_IRQS];
+extern int irq_vector[NR_IRQS];
+
+extern void init_IRQ_SMP(void);
+extern int handle_IRQ_event(unsigned int, struct pt_regs *);
+
 /*
  * Various low-level irq details needed by irq.c, process.c,
  * time.c, io_apic.c and smp.c
@@ -10,21 +56,19 @@
 
 void mask_irq(unsigned int irq);
 void unmask_irq(unsigned int irq);
-void enable_IO_APIC_irq (unsigned int irq);
-void disable_IO_APIC_irq (unsigned int irq);
-void set_8259A_irq_mask(unsigned int irq);
+void disable_8259A_irq(unsigned int irq);
+int i8259A_irq_pending (unsigned int irq);
 void ack_APIC_irq (void);
 void setup_IO_APIC (void);
-void init_IO_APIC_traps(void);
 int IO_APIC_get_PCI_irq_vector (int bus, int slot, int fn);
-int IO_APIC_irq_trigger (int irq);
 void make_8259A_irq (unsigned int irq);
 void send_IPI (int dest, int vector);
 void init_pic_mode (void);
+void print_IO_APIC (void);
 
-extern unsigned int io_apic_irqs;
+extern unsigned long long io_apic_irqs;
 
-#define IO_APIC_VECTOR(irq)	(0x51+((irq)<<3))
+#define IO_APIC_VECTOR(irq)	irq_vector[irq]
 
 #define MAX_IRQ_SOURCES 128
 #define MAX_MP_BUSSES 32
@@ -68,10 +112,6 @@ static inline void irq_exit(int cpu, unsigned int irq)
 #define irq_enter(cpu, irq)	(++local_irq_count[cpu])
 #define irq_exit(cpu, irq)	(--local_irq_count[cpu])
 
-/* Make these no-ops when not using SMP */
-#define enable_IO_APIC_irq(x)	do { } while (0)
-#define disable_IO_APIC_irq(x)	do { } while (0)
-
 #define IO_APIC_IRQ(x)	(0)
 
 #endif
@@ -159,7 +199,7 @@ static inline void x86_do_profile (unsigned long eip)
 		eip -= (unsigned long) &_stext;
 		eip >>= prof_shift;
 		/*
-		 * Dont ignore out-of-bounds EIP values silently,
+		 * Don't ignore out-of-bounds EIP values silently,
 		 * put them into the last histogram slot, so if
 		 * present, they will show up as a sharp peak.
 		 */
-- 
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