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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc64/irq.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'include/asm-sparc64/irq.h')
-rw-r--r--include/asm-sparc64/irq.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h
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+++ b/include/asm-sparc64/irq.h
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+/* $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