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-sparc64/irq.h

@@ -0,0 +1,157 @@
+/* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $
+ * irq.h: IRQ registers on the 64-bit Sparc.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#ifndef _SPARC64_IRQ_H
+#define _SPARC64_IRQ_H
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <asm/pil.h>
+#include <asm/ptrace.h>
+
+/* You should not mess with this directly. That's the job of irq.c.
+ *
+ * If you make changes here, please update hand coded assembler of
+ * SBUS/floppy interrupt handler in entry.S -DaveM
+ *
+ * This is currently one DCACHE line, two buckets per L2 cache
+ * line.  Keep this in mind please.
+ */
+struct ino_bucket {
+	/* Next handler in per-CPU PIL worklist.  We know that
+	 * bucket pointers have the high 32-bits clear, so to
+	 * save space we only store the bits we need.
+	 */
+/*0x00*/unsigned int irq_chain;
+
+	/* PIL to schedule this IVEC at. */
+/*0x04*/unsigned char pil;
+
+	/* If an IVEC arrives while irq_info is NULL, we
+	 * set this to notify request_irq() about the event.
+	 */
+/*0x05*/unsigned char pending;
+
+	/* Miscellaneous flags. */
+/*0x06*/unsigned char flags;
+
+	/* This is used to deal with IBF_DMA_SYNC on
+	 * Sabre systems.
+	 */
+/*0x07*/unsigned char synctab_ent;
+
+	/* Reference to handler for this IRQ.  If this is
+	 * non-NULL this means it is active and should be
+	 * serviced.  Else the pending member is set to one
+	 * and later registry of the interrupt checks for
+	 * this condition.
+	 *
+	 * Normally this is just an irq_action structure.
+	 * But, on PCI, if multiple interrupt sources behind
+	 * a bridge have multiple interrupt sources that share
+	 * the same INO bucket, this points to an array of
+	 * pointers to four IRQ action structures.
+	 */
+/*0x08*/void *irq_info;
+
+	/* Sun5 Interrupt Clear Register. */
+/*0x10*/unsigned long iclr;
+
+	/* Sun5 Interrupt Mapping Register. */
+/*0x18*/unsigned long imap;
+
+};
+
+#ifdef CONFIG_PCI
+extern unsigned long pci_dma_wsync;
+extern unsigned long dma_sync_reg_table[256];
+extern unsigned char dma_sync_reg_table_entry;
+#endif
+
+/* IMAP/ICLR register defines */
+#define IMAP_VALID		0x80000000	/* IRQ Enabled		*/
+#define IMAP_TID_UPA		0x7c000000	/* UPA TargetID		*/
+#define IMAP_TID_JBUS		0x7c000000	/* JBUS TargetID	*/
+#define IMAP_AID_SAFARI		0x7c000000	/* Safari AgentID	*/
+#define IMAP_NID_SAFARI		0x03e00000	/* Safari NodeID	*/
+#define IMAP_IGN		0x000007c0	/* IRQ Group Number	*/
+#define IMAP_INO		0x0000003f	/* IRQ Number		*/
+#define IMAP_INR		0x000007ff	/* Full interrupt number*/
+
+#define ICLR_IDLE		0x00000000	/* Idle state		*/
+#define ICLR_TRANSMIT		0x00000001	/* Transmit state	*/
+#define ICLR_PENDING		0x00000003	/* Pending state	*/
+
+/* Only 8-bits are available, be careful.  -DaveM */
+#define IBF_DMA_SYNC	0x01	/* DMA synchronization behind PCI bridge needed. */
+#define IBF_PCI		0x02	/* Indicates PSYCHO/SABRE/SCHIZO PCI interrupt.	 */
+#define IBF_ACTIVE	0x04	/* This interrupt is active and has a handler.	 */
+#define IBF_MULTI	0x08	/* On PCI, indicates shared bucket.		 */
+#define IBF_INPROGRESS	0x10	/* IRQ is being serviced.			 */
+
+#define NUM_IVECS	(IMAP_INR + 1)
+extern struct ino_bucket ivector_table[NUM_IVECS];
+
+#define __irq_ino(irq) \
+        (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
+#define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil
+#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
+#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
+
+static __inline__ char *__irq_itoa(unsigned int irq)
+{
+	static char buff[16];
+
+	sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq));
+	return buff;
+}
+
+#define NR_IRQS    16
+
+#define irq_canonicalize(irq)	(irq)
+extern void disable_irq(unsigned int);
+#define disable_irq_nosync disable_irq
+extern void enable_irq(unsigned int);
+extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap);
+extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
+
+extern int request_fast_irq(unsigned int irq,
+			    irqreturn_t (*handler)(int, void *, struct pt_regs *),
+			    unsigned long flags, __const__ char *devname,
+			    void *dev_id);
+
+static __inline__ void set_softint(unsigned long bits)
+{
+	__asm__ __volatile__("wr	%0, 0x0, %%set_softint"
+			     : /* No outputs */
+			     : "r" (bits));
+}
+
+static __inline__ void clear_softint(unsigned long bits)
+{
+	__asm__ __volatile__("wr	%0, 0x0, %%clear_softint"
+			     : /* No outputs */
+			     : "r" (bits));
+}
+
+static __inline__ unsigned long get_softint(void)
+{
+	unsigned long retval;
+
+	__asm__ __volatile__("rd	%%softint, %0"
+			     : "=r" (retval));
+	return retval;
+}
+
+struct irqaction;
+struct pt_regs;
+int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
+
+#endif