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Message-Id: <200707120705.l6C75Icx014878@goober>
Date: Thu, 12 Jul 2007 17:05:18 +1000
From: Greg Ungerer <gerg@...pgear.com>
To: torvalds@...ux-foundation.org
Cc: gerg@...inux.org, linux-kernel@...r.kernel.org
Subject: [M68KNOMMU]: generic irq handling
Change the m68knommu irq handling to use the generic irq framework.
Signed-off-by: Greg Ungerer <gerg@...inux.org>
---
arch/m68knommu/Kconfig | 4
arch/m68knommu/kernel/Makefile | 4
arch/m68knommu/kernel/asm-offsets.c | 5
arch/m68knommu/kernel/irq.c | 82 +++++++++
arch/m68knommu/kernel/traps.c | 2
arch/m68knommu/platform/5307/Makefile | 2
arch/m68knommu/platform/5307/entry.S | 47 +----
arch/m68knommu/platform/5307/ints.c | 279 ---------------------------------
arch/m68knommu/platform/5307/vectors.c | 29 ++-
arch/m68knommu/platform/68328/entry.S | 10 -
arch/m68knommu/platform/68328/ints.c | 130 ++-------------
arch/m68knommu/platform/68360/entry.S | 6
arch/m68knommu/platform/68360/ints.c | 233 +--------------------------
include/asm-m68knommu/irq.h | 75 --------
include/asm-m68knommu/irqnode.h | 36 ----
include/asm-m68knommu/m68360.h | 8
include/asm-m68knommu/traps.h | 4
17 files changed, 176 insertions(+), 780 deletions(-)
diff -Naur linux-2.6.22/arch/m68knommu/Kconfig linux-2.6.22-uc0/arch/m68knommu/Kconfig
--- linux-2.6.22/arch/m68knommu/Kconfig 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/Kconfig 2007-07-12 15:27:03.000000000 +1000
@@ -45,6 +45,10 @@
bool
default y
+config GENERIC_HARDIRQS
+ bool
+ default y
+
config GENERIC_CALIBRATE_DELAY
bool
default y
diff -Naur linux-2.6.22/arch/m68knommu/kernel/asm-offsets.c linux-2.6.22-uc0/arch/m68knommu/kernel/asm-offsets.c
--- linux-2.6.22/arch/m68knommu/kernel/asm-offsets.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/kernel/asm-offsets.c 2007-07-12 15:27:00.000000000 +1000
@@ -15,7 +15,6 @@
#include <linux/hardirq.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
-#include <asm/irqnode.h>
#include <asm/thread_info.h>
#define DEFINE(sym, val) \
@@ -72,10 +71,6 @@
#else
/* bitfields are a bit difficult */
DEFINE(PT_VECTOR, offsetof(struct pt_regs, pc) + 4);
- /* offsets into the irq_handler struct */
- DEFINE(IRQ_HANDLER, offsetof(struct irq_node, handler));
- DEFINE(IRQ_DEVID, offsetof(struct irq_node, dev_id));
- DEFINE(IRQ_NEXT, offsetof(struct irq_node, next));
#endif
/* offsets into the kernel_stat struct */
diff -Naur linux-2.6.22/arch/m68knommu/kernel/irq.c linux-2.6.22-uc0/arch/m68knommu/kernel/irq.c
--- linux-2.6.22/arch/m68knommu/kernel/irq.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/kernel/irq.c 2007-07-12 15:27:00.000000000 +1000
@@ -0,0 +1,82 @@
+/*
+ * irq.c
+ *
+ * (C) Copyright 2007, Greg Ungerer <gerg@...pgear.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+
+asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
+{
+ struct pt_regs *oldregs = set_irq_regs(regs);
+
+ irq_enter();
+ __do_IRQ(irq);
+ irq_exit();
+
+ set_irq_regs(oldregs);
+}
+
+void ack_bad_irq(unsigned int irq)
+{
+ printk(KERN_ERR "IRQ: unexpected irq=%d\n", irq);
+}
+
+static struct irq_chip m_irq_chip = {
+ .name = "M68K-INTC",
+ .enable = enable_vector,
+ .disable = disable_vector,
+ .ack = ack_vector,
+};
+
+void __init init_IRQ(void)
+{
+ int irq;
+
+ init_vectors();
+
+ for (irq = 0; (irq < NR_IRQS); irq++) {
+ irq_desc[irq].status = IRQ_DISABLED;
+ irq_desc[irq].action = NULL;
+ irq_desc[irq].depth = 1;
+ irq_desc[irq].chip = &m_irq_chip;
+ }
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+ struct irqaction *ap;
+ int irq = *((loff_t *) v);
+
+ if (irq == 0)
+ seq_puts(p, " CPU0\n");
+
+ if (irq < NR_IRQS) {
+ ap = irq_desc[irq].action;
+ if (ap) {
+ seq_printf(p, "%3d: ", irq);
+ seq_printf(p, "%10u ", kstat_irqs(irq));
+ seq_printf(p, "%14s ", irq_desc[irq].chip->name);
+
+ seq_printf(p, "%s", ap->name);
+ for (ap = ap->next; ap; ap = ap->next)
+ seq_printf(p, ", %s", ap->name);
+ seq_putc(p, '\n');
+ }
+ }
+
+ return 0;
+}
+
diff -Naur linux-2.6.22/arch/m68knommu/kernel/Makefile linux-2.6.22-uc0/arch/m68knommu/kernel/Makefile
--- linux-2.6.22/arch/m68knommu/kernel/Makefile 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/kernel/Makefile 2007-07-12 15:27:00.000000000 +1000
@@ -4,8 +4,8 @@
extra-y := vmlinux.lds
-obj-y += dma.o entry.o init_task.o m68k_ksyms.o process.o ptrace.o semaphore.o \
- setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
+obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \
+ semaphore.o setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_COMEMPCI) += comempci.o
diff -Naur linux-2.6.22/arch/m68knommu/kernel/traps.c linux-2.6.22-uc0/arch/m68knommu/kernel/traps.c
--- linux-2.6.22/arch/m68knommu/kernel/traps.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/kernel/traps.c 2007-07-12 15:27:00.000000000 +1000
@@ -62,8 +62,6 @@
void __init trap_init(void)
{
- if (mach_trap_init)
- mach_trap_init();
}
void die_if_kernel(char *str, struct pt_regs *fp, int nr)
diff -Naur linux-2.6.22/arch/m68knommu/platform/5307/entry.S linux-2.6.22-uc0/arch/m68knommu/platform/5307/entry.S
--- linux-2.6.22/arch/m68knommu/platform/5307/entry.S 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/5307/entry.S 2007-07-12 15:27:01.000000000 +1000
@@ -1,7 +1,7 @@
/*
* linux/arch/m68knommu/platform/5307/entry.S
*
- * Copyright (C) 1999-2002, Greg Ungerer (gerg@...pgear.com)
+ * Copyright (C) 1999-2007, Greg Ungerer (gerg@...pgear.com)
* Copyright (C) 1998 D. Jeff Dionne <jeff@...eo.ca>,
* Kenneth Albanowski <kjahds@...hds.com>,
* Copyright (C) 2000 Lineo Inc. (www.lineo.com)
@@ -155,34 +158,21 @@
/*
* This is the generic interrupt handler (for all hardware interrupt
- * sources). It figures out the vector number and calls the appropriate
- * interrupt service routine directly.
+ * sources). Calls upto high level code to do all the work.
*/
ENTRY(inthandler)
SAVE_ALL
moveq #-1,%d0
movel %d0,%sp@(PT_ORIG_D0)
- addql #1,local_irq_count
movew %sp@(PT_FORMATVEC),%d0 /* put exception # in d0 */
andl #0x03fc,%d0 /* mask out vector only */
- leal per_cpu__kstat+STAT_IRQ,%a0
- addql #1,%a0@(%d0)
-
+ movel %sp,%sp@- /* push regs arg */
lsrl #2,%d0 /* calculate real vector # */
- movel %d0,%d1 /* calculate array offset */
- lsll #4,%d1
- lea irq_list,%a0
- addl %d1,%a0 /* pointer to array struct */
-
- movel %sp,%sp@- /* push regs arg onto stack */
- movel %a0@(8),%sp@- /* push devid arg */
- movel %d0,%sp@- /* push vector # on stack */
-
- movel %a0@,%a0 /* get function to call */
- jbsr %a0@ /* call vector handler */
- lea %sp@(12),%sp /* pop parameters off stack */
+ movel %d0,%sp@- /* push vector number */
+ jbsr do_IRQ /* call high level irq handler */
+ lea %sp@(8),%sp /* pop args off stack */
bra ret_from_interrupt /* this was fallthrough */
@@ -198,24 +188,15 @@
movew %sp@(PT_FORMATVEC),%d0
andl #0x03fc,%d0 /* mask out vector only */
- leal per_cpu__kstat+STAT_IRQ,%a0
- addql #1,%a0@(%d0)
-
- movel %sp,%sp@- /* push regs arg onto stack */
- clrl %sp@- /* push devid arg */
+ movel %sp,%sp@- /* push regs arg */
lsrl #2,%d0 /* calculate real vector # */
- movel %d0,%sp@- /* push vector # on stack */
-
- lsll #4,%d0 /* adjust for array offset */
- lea irq_list,%a0
- movel %a0@(%d0),%a0 /* get function to call */
- jbsr %a0@ /* call vector handler */
- lea %sp@(12),%sp /* pop parameters off stack */
+ movel %d0,%sp@- /* push vector number */
+ jbsr do_IRQ /* call high level irq handler */
+ lea %sp@(8),%sp /* pop args off stack */
RESTORE_LOCAL
ENTRY(ret_from_interrupt)
- subql #1,local_irq_count
jeq 2f
1:
RESTORE_ALL
diff -Naur linux-2.6.22/arch/m68knommu/platform/5307/ints.c linux-2.6.22-uc0/arch/m68knommu/platform/5307/ints.c
--- linux-2.6.22/arch/m68knommu/platform/5307/ints.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/5307/ints.c 1970-01-01 10:00:00.000000000 +1000
@@ -1,279 +0,0 @@
-/*
- * linux/arch/m68knommu/kernel/ints.c -- General interrupt handling code
- *
- * Copyright (C) 1999-2002 Greg Ungerer (gerg@...pgear.com)
- * Copyright (C) 1998 D. Jeff Dionne <jeff@...eo.ca>,
- * Kenneth Albanowski <kjahds@...hds.com>,
- * Copyright (C) 2000 Lineo Inc. (www.lineo.com)
- *
- * Based on:
- *
- * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/errno.h>
-#include <linux/seq_file.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/irqnode.h>
-#include <asm/traps.h>
-#include <asm/page.h>
-#include <asm/machdep.h>
-
-/*
- * This table stores the address info for each vector handler.
- */
-struct irq_entry irq_list[SYS_IRQS];
-
-#define NUM_IRQ_NODES 16
-static irq_node_t nodes[NUM_IRQ_NODES];
-
-/* The number of spurious interrupts */
-volatile unsigned int num_spurious;
-
-unsigned int local_irq_count[NR_CPUS];
-
-static irqreturn_t default_irq_handler(int irq, void *ptr)
-{
-#if 1
- printk(KERN_INFO "%s(%d): default irq handler vec=%d [0x%x]\n",
- __FILE__, __LINE__, irq, irq);
-#endif
- return(IRQ_HANDLED);
-}
-
-/*
- * void init_IRQ(void)
- *
- * Parameters: None
- *
- * Returns: Nothing
- *
- * This function should be called during kernel startup to initialize
- * the IRQ handling routines.
- */
-
-void __init init_IRQ(void)
-{
- int i;
-
- for (i = 0; i < SYS_IRQS; i++) {
- if (mach_default_handler)
- irq_list[i].handler = mach_default_handler;
- else
- irq_list[i].handler = default_irq_handler;
- irq_list[i].flags = IRQ_FLG_STD;
- irq_list[i].dev_id = NULL;
- irq_list[i].devname = NULL;
- }
-
- for (i = 0; i < NUM_IRQ_NODES; i++)
- nodes[i].handler = NULL;
-
- if (mach_init_IRQ)
- mach_init_IRQ();
-}
-
-irq_node_t *new_irq_node(void)
-{
- irq_node_t *node;
- short i;
-
- for (node = nodes, i = NUM_IRQ_NODES-1; i >= 0; node++, i--)
- if (!node->handler)
- return node;
-
- printk(KERN_INFO "new_irq_node: out of nodes\n");
- return NULL;
-}
-
-int request_irq(
- unsigned int irq,
- irq_handler_t handler,
- unsigned long flags,
- const char *devname,
- void *dev_id)
-{
- if (irq < 0 || irq >= NR_IRQS) {
- printk(KERN_WARNING "%s: Incorrect IRQ %d from %s\n", __FUNCTION__,
- irq, devname);
- return -ENXIO;
- }
-
- if (!(irq_list[irq].flags & IRQ_FLG_STD)) {
- if (irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, irq_list[irq].devname);
- return -EBUSY;
- }
- if (flags & IRQ_FLG_REPLACE) {
- printk(KERN_WARNING "%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, irq_list[irq].devname);
- return -EBUSY;
- }
- }
-
- if (flags & IRQ_FLG_FAST) {
- extern asmlinkage void fasthandler(void);
- extern void set_evector(int vecnum, void (*handler)(void));
- set_evector(irq, fasthandler);
- }
-
- irq_list[irq].handler = handler;
- irq_list[irq].flags = flags;
- irq_list[irq].dev_id = dev_id;
- irq_list[irq].devname = devname;
- return 0;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-void free_irq(unsigned int irq, void *dev_id)
-{
- if (irq >= NR_IRQS) {
- printk(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (irq_list[irq].dev_id != dev_id)
- printk(KERN_WARNING "%s: Removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, irq_list[irq].devname);
-
- if (irq_list[irq].flags & IRQ_FLG_FAST) {
- extern asmlinkage void inthandler(void);
- extern void set_evector(int vecnum, void (*handler)(void));
- set_evector(irq, inthandler);
- }
-
- if (mach_default_handler)
- irq_list[irq].handler = mach_default_handler;
- else
- irq_list[irq].handler = default_irq_handler;
- irq_list[irq].flags = IRQ_FLG_STD;
- irq_list[irq].dev_id = NULL;
- irq_list[irq].devname = NULL;
-}
-
-EXPORT_SYMBOL(free_irq);
-
-
-int sys_request_irq(unsigned int irq, irq_handler_t handler,
- unsigned long flags, const char *devname, void *dev_id)
-{
- if (irq > IRQ7) {
- printk(KERN_WARNING "%s: Incorrect IRQ %d from %s\n",
- __FUNCTION__, irq, devname);
- return -ENXIO;
- }
-
-#if 0
- if (!(irq_list[irq].flags & IRQ_FLG_STD)) {
- if (irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, irq_list[irq].devname);
- return -EBUSY;
- }
- if (!(flags & IRQ_FLG_REPLACE)) {
- printk(KERN_WARNING "%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, irq_list[irq].devname);
- return -EBUSY;
- }
- }
-#endif
-
- irq_list[irq].handler = handler;
- irq_list[irq].flags = flags;
- irq_list[irq].dev_id = dev_id;
- irq_list[irq].devname = devname;
- return 0;
-}
-
-void sys_free_irq(unsigned int irq, void *dev_id)
-{
- if (irq > IRQ7) {
- printk(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (irq_list[irq].dev_id != dev_id)
- printk(KERN_WARNING "%s: Removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, irq_list[irq].devname);
-
- irq_list[irq].handler = mach_default_handler;
- irq_list[irq].flags = 0;
- irq_list[irq].dev_id = NULL;
- irq_list[irq].devname = NULL;
-}
-
-/*
- * Do we need these probe functions on the m68k?
- *
- * ... may be useful with ISA devices
- */
-unsigned long probe_irq_on (void)
-{
- return 0;
-}
-
-EXPORT_SYMBOL(probe_irq_on);
-
-int probe_irq_off (unsigned long irqs)
-{
- return 0;
-}
-
-EXPORT_SYMBOL(probe_irq_off);
-
-asmlinkage void process_int(unsigned long vec, struct pt_regs *fp)
-{
- if (vec >= VEC_INT1 && vec <= VEC_INT7) {
- vec -= VEC_SPUR;
- kstat_cpu(0).irqs[vec]++;
- irq_list[vec].handler(vec, irq_list[vec].dev_id);
- } else {
- if (mach_process_int)
- mach_process_int(vec, fp);
- else
- panic("Can't process interrupt vector %ld\n", vec);
- return;
- }
-}
-
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v;
-
- if (i < NR_IRQS) {
- if (! (irq_list[i].flags & IRQ_FLG_STD)) {
- seq_printf(p, "%3d: %10u ", i,
- (i ? kstat_cpu(0).irqs[i] : num_spurious));
- if (irq_list[i].flags & IRQ_FLG_LOCK)
- seq_printf(p, "L ");
- else
- seq_printf(p, " ");
- seq_printf(p, "%s\n", irq_list[i].devname);
- }
- }
-
- if (i == NR_IRQS && mach_get_irq_list)
- mach_get_irq_list(p, v);
- return 0;
-}
-
-void init_irq_proc(void)
-{
- /* Insert /proc/irq driver here */
-}
-
diff -Naur linux-2.6.22/arch/m68knommu/platform/5307/Makefile linux-2.6.22-uc0/arch/m68knommu/platform/5307/Makefile
--- linux-2.6.22/arch/m68knommu/platform/5307/Makefile 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/5307/Makefile 2007-07-12 15:27:01.000000000 +1000
@@ -16,7 +16,7 @@
AFLAGS += -DDEBUGGER_COMPATIBLE_CACHE=1
endif
-obj-$(CONFIG_COLDFIRE) += entry.o vectors.o ints.o
+obj-$(CONFIG_COLDFIRE) += entry.o vectors.o
obj-$(CONFIG_M5206) += timers.o
obj-$(CONFIG_M5206e) += timers.o
obj-$(CONFIG_M520x) += pit.o
diff -Naur linux-2.6.22/arch/m68knommu/platform/5307/vectors.c linux-2.6.22-uc0/arch/m68knommu/platform/5307/vectors.c
--- linux-2.6.22/arch/m68knommu/platform/5307/vectors.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/5307/vectors.c 2007-07-12 15:27:01.000000000 +1000
@@ -3,23 +3,17 @@
/*
* linux/arch/m68knommu/platform/5307/vectors.c
*
- * Copyright (C) 1999-2003, Greg Ungerer <gerg@...pgear.com>
+ * Copyright (C) 1999-2007, Greg Ungerer <gerg@...pgear.com>
*/
/***************************************************************************/
#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/param.h>
#include <linux/init.h>
-#include <linux/unistd.h>
-#include <linux/delay.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
+#include <linux/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
-#include <asm/mcftimer.h>
#include <asm/mcfsim.h>
#include <asm/mcfdma.h>
#include <asm/mcfwdebug.h>
@@ -56,7 +50,7 @@
asmlinkage void system_call(void);
asmlinkage void inthandler(void);
-void __init coldfire_trap_init(void)
+void __init init_vectors(void)
{
int i;
@@ -86,6 +80,23 @@
/***************************************************************************/
+void enable_vector(unsigned int irq)
+{
+ /* Currently no action on ColdFire */
+}
+
+void disable_vector(unsigned int irq)
+{
+ /* Currently no action on ColdFire */
+}
+
+void ack_vector(unsigned int irq)
+{
+ /* Currently no action on ColdFire */
+}
+
+/***************************************************************************/
+
void coldfire_reset(void)
{
HARD_RESET_NOW();
diff -Naur linux-2.6.22/arch/m68knommu/platform/68328/entry.S linux-2.6.22-uc0/arch/m68knommu/platform/68328/entry.S
--- linux-2.6.22/arch/m68knommu/platform/68328/entry.S 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/68328/entry.S 2007-07-12 15:27:00.000000000 +1000
@@ -133,7 +133,6 @@
*/
inthandler1:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -145,7 +144,6 @@
inthandler2:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -157,7 +155,6 @@
inthandler3:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -169,7 +166,6 @@
inthandler4:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -181,7 +177,6 @@
inthandler5:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -193,7 +188,6 @@
inthandler6:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -205,7 +199,6 @@
inthandler7:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -217,7 +210,6 @@
inthandler:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@@ -228,7 +220,6 @@
bra ret_from_interrupt
ret_from_interrupt:
- subql #1,local_irq_count
jeq 1f
2:
RESTORE_ALL
@@ -238,7 +229,6 @@
jhi 2b
/* check if we need to do software interrupts */
- movel local_irq_count,%d0
jeq ret_from_exception
pea ret_from_exception
diff -Naur linux-2.6.22/arch/m68knommu/platform/68328/ints.c linux-2.6.22-uc0/arch/m68knommu/platform/68328/ints.c
--- linux-2.6.22/arch/m68knommu/platform/68328/ints.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/68328/ints.c 2007-07-12 15:27:00.000000000 +1000
@@ -9,21 +9,14 @@
* Copyright 1999 D. Jeff Dionne <jeff@...control.com>
*/
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/errno.h>
+#include <linux/init.h>
#include <linux/interrupt.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/irqnode.h>
+#include <linux/irq.h>
#include <asm/traps.h>
#include <asm/io.h>
#include <asm/machdep.h>
-#include <asm/setup.h>
#if defined(CONFIG_M68328)
#include <asm/MC68328.h>
@@ -79,16 +72,12 @@
/* The number of spurious interrupts */
volatile unsigned int num_spurious;
-unsigned int local_irq_count[NR_CPUS];
-
-/* irq node variables for the 32 (potential) on chip sources */
-static irq_node_t int_irq_list[NR_IRQS];
/*
* This function should be called during kernel startup to initialize
- * the IRQ handling routines.
+ * the machine vector table.
*/
-void init_IRQ(void)
+void __init init_vectors(void)
{
int i;
@@ -108,96 +97,10 @@
IVR = 0x40; /* Set DragonBall IVR (interrupt base) to 64 */
- /* initialize handlers */
- for (i = 0; i < NR_IRQS; i++) {
- int_irq_list[i].handler = bad_interrupt;
- int_irq_list[i].flags = IRQ_FLG_STD;
- int_irq_list[i].dev_id = NULL;
- int_irq_list[i].devname = NULL;
- }
-
/* turn off all interrupts */
IMR = ~0;
}
-int request_irq(
- unsigned int irq,
- irq_handler_t handler,
- unsigned long flags,
- const char *devname,
- void *dev_id)
-{
- if (irq >= NR_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname);
- return -ENXIO;
- }
-
- if (!(int_irq_list[irq].flags & IRQ_FLG_STD)) {
- if (int_irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk(KERN_ERR "%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- if (flags & IRQ_FLG_REPLACE) {
- printk(KERN_ERR "%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- }
-
- int_irq_list[irq].handler = handler;
- int_irq_list[irq].flags = flags;
- int_irq_list[irq].dev_id = dev_id;
- int_irq_list[irq].devname = devname;
-
- IMR &= ~(1<<irq);
-
- return 0;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-void free_irq(unsigned int irq, void *dev_id)
-{
- if (irq >= NR_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (int_irq_list[irq].dev_id != dev_id)
- printk(KERN_INFO "%s: removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
-
- int_irq_list[irq].handler = bad_interrupt;
- int_irq_list[irq].flags = IRQ_FLG_STD;
- int_irq_list[irq].dev_id = NULL;
- int_irq_list[irq].devname = NULL;
-
- IMR |= 1<<irq;
-}
-
-EXPORT_SYMBOL(free_irq);
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v;
-
- if (i < NR_IRQS) {
- if (int_irq_list[i].devname) {
- seq_printf(p, "%3d: %10u ", i, kstat_cpu(0).irqs[i]);
- if (int_irq_list[i].flags & IRQ_FLG_LOCK)
- seq_printf(p, "L ");
- else
- seq_printf(p, " ");
- seq_printf(p, "%s\n", int_irq_list[i].devname);
- }
- }
- if (i == NR_IRQS)
- seq_printf(p, " : %10u spurious\n", num_spurious);
-
- return 0;
-}
-
/* The 68k family did not have a good way to determine the source
* of interrupts until later in the family. The EC000 core does
* not provide the vector number on the stack, we vector everything
@@ -255,14 +158,23 @@
irq++;
}
- kstat_cpu(0).irqs[irq]++;
-
- if (int_irq_list[irq].handler) {
- int_irq_list[irq].handler(irq, int_irq_list[irq].dev_id, fp);
- } else {
- printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the IMR...\n", irq);
- IMR |= mask;
- }
+ do_IRQ(irq, fp);
pend &= ~mask;
}
}
+
+void enable_vector(unsigned int irq)
+{
+ IMR &= ~(1<<irq);
+}
+
+void disable_vector(unsigned int irq)
+{
+ IMR |= (1<<irq);
+}
+
+void ack_vector(unsigned int irq)
+{
+ /* Nothing needed */
+}
+
diff -Naur linux-2.6.22/arch/m68knommu/platform/68360/entry.S linux-2.6.22-uc0/arch/m68knommu/platform/68360/entry.S
--- linux-2.6.22/arch/m68knommu/platform/68360/entry.S 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/68360/entry.S 2007-07-12 15:27:01.000000000 +1000
@@ -120,23 +120,21 @@
RESTORE_ALL
/*
- * This is the main interrupt handler, responsible for calling process_int()
+ * This is the main interrupt handler, responsible for calling do_IRQ()
*/
inthandler:
SAVE_ALL
- addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and.l #0x3ff, %d0
lsr.l #0x02, %d0
movel %sp,%sp@-
movel %d0,%sp@- /* put vector # on stack*/
- jbsr process_int /* process the IRQ*/
+ jbsr do_IRQ /* process the IRQ*/
3: addql #8,%sp /* pop parameters off stack*/
bra ret_from_interrupt
ret_from_interrupt:
- subql #1,local_irq_count
jeq 1f
2:
RESTORE_ALL
diff -Naur linux-2.6.22/arch/m68knommu/platform/68360/ints.c linux-2.6.22-uc0/arch/m68knommu/platform/68360/ints.c
--- linux-2.6.22/arch/m68knommu/platform/68360/ints.c 2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/68360/ints.c 2007-07-12 15:27:01.000000000 +1000
@@ -10,20 +10,13 @@
* Copyright (c) 1999 D. Jeff Dionne <jeff@...inux.org>
*/
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/errno.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/irqnode.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <asm/traps.h>
-#include <asm/io.h>
#include <asm/machdep.h>
-#include <asm/setup.h>
#include <asm/m68360.h>
/* from quicc/commproc.c: */
@@ -36,26 +29,19 @@
asmlinkage void system_call(void);
asmlinkage void buserr(void);
asmlinkage void trap(void);
-asmlinkage irqreturn_t bad_interrupt(void);
-asmlinkage irqreturn_t inthandler(void);
+asmlinkage void bad_interrupt(void);
+asmlinkage void inthandler(void);
extern void *_ramvec[];
/* The number of spurious interrupts */
volatile unsigned int num_spurious;
-unsigned int local_irq_count[NR_CPUS];
-
-/* irq node variables for the 32 (potential) on chip sources */
-static irq_node_t int_irq_list[INTERNAL_IRQS];
-
-static short int_irq_ablecount[INTERNAL_IRQS];
/*
* This function should be called during kernel startup to initialize
- * IRQ handling routines.
+ * the vector table.
*/
-
-void init_IRQ(void)
+void init_vectors(void)
{
int i;
int vba = (CPM_VECTOR_BASE<<4);
@@ -79,7 +65,6 @@
_ramvec[32] = system_call;
_ramvec[33] = trap;
-
cpm_interrupt_init();
/* set up CICR for vector base address and irq level */
@@ -124,212 +109,20 @@
/* turn off all CPM interrupts */
pquicc->intr_cimr = 0x00000000;
-
- /* initialize handlers */
- for (i = 0; i < INTERNAL_IRQS; i++) {
- int_irq_list[i].handler = NULL;
- int_irq_list[i].flags = IRQ_FLG_STD;
- int_irq_list[i].dev_id = NULL;
- int_irq_list[i].devname = NULL;
- }
}
-#if 0
-void M68360_insert_irq(irq_node_t **list, irq_node_t *node)
+void enable_vector(unsigned int irq)
{
- unsigned long flags;
- irq_node_t *cur;
-
- if (!node->dev_id)
- printk(KERN_INFO "%s: Warning: dev_id of %s is zero\n",
- __FUNCTION__, node->devname);
-
- local_irq_save(flags);
-
- cur = *list;
-
- while (cur) {
- list = &cur->next;
- cur = cur->next;
- }
-
- node->next = cur;
- *list = node;
-
- local_irq_restore(flags);
+ pquicc->intr_cimr |= (1 << irq);
}
-void M68360_delete_irq(irq_node_t **list, void *dev_id)
+void disable_vector(unsigned int irq)
{
- unsigned long flags;
- irq_node_t *node;
-
- local_irq_save(flags);
-
- for (node = *list; node; list = &node->next, node = *list) {
- if (node->dev_id == dev_id) {
- *list = node->next;
- /* Mark it as free. */
- node->handler = NULL;
- local_irq_restore(flags);
- return;
- }
- }
- local_irq_restore(flags);
- printk (KERN_INFO "%s: tried to remove invalid irq\n", __FUNCTION__);
+ pquicc->intr_cimr &= ~(1 << irq);
}
-#endif
-int request_irq(
- unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long flags,
- const char *devname,
- void *dev_id)
+void ack_vector(unsigned int irq)
{
- int mask = (1<<irq);
-
- irq += (CPM_VECTOR_BASE<<4);
-
- if (irq >= INTERNAL_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname);
- return -ENXIO;
- }
-
- if (!(int_irq_list[irq].flags & IRQ_FLG_STD)) {
- if (int_irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk(KERN_ERR "%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- if (flags & IRQ_FLG_REPLACE) {
- printk(KERN_ERR "%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- }
- int_irq_list[irq].handler = handler;
- int_irq_list[irq].flags = flags;
- int_irq_list[irq].dev_id = dev_id;
- int_irq_list[irq].devname = devname;
-
- /* enable in the CIMR */
- if (!int_irq_ablecount[irq])
- pquicc->intr_cimr |= mask;
- /* *(volatile unsigned long *)0xfffff304 &= ~(1<<irq); */
-
- return 0;
+ pquicc->intr_cisr = (1 << irq);
}
-EXPORT_SYMBOL(request_irq);
-
-void free_irq(unsigned int irq, void *dev_id)
-{
- if (irq >= INTERNAL_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (int_irq_list[irq].dev_id != dev_id)
- printk(KERN_INFO "%s: removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
- int_irq_list[irq].handler = NULL;
- int_irq_list[irq].flags = IRQ_FLG_STD;
- int_irq_list[irq].dev_id = NULL;
- int_irq_list[irq].devname = NULL;
-
- *(volatile unsigned long *)0xfffff304 |= 1<<irq;
-}
-
-EXPORT_SYMBOL(free_irq);
-
-#if 0
-/*
- * Enable/disable a particular machine specific interrupt source.
- * Note that this may affect other interrupts in case of a shared interrupt.
- * This function should only be called for a _very_ short time to change some
- * internal data, that may not be changed by the interrupt at the same time.
- * int_(enable|disable)_irq calls may also be nested.
- */
-void M68360_enable_irq(unsigned int irq)
-{
- if (irq >= INTERNAL_IRQS) {
- printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (--int_irq_ablecount[irq])
- return;
-
- /* enable the interrupt */
- *(volatile unsigned long *)0xfffff304 &= ~(1<<irq);
-}
-
-void M68360_disable_irq(unsigned int irq)
-{
- if (irq >= INTERNAL_IRQS) {
- printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (int_irq_ablecount[irq]++)
- return;
-
- /* disable the interrupt */
- *(volatile unsigned long *)0xfffff304 |= 1<<irq;
-}
-#endif
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v;
-
- if (i < NR_IRQS) {
- if (int_irq_list[i].devname) {
- seq_printf(p, "%3d: %10u ", i, kstat_cpu(0).irqs[i]);
- if (int_irq_list[i].flags & IRQ_FLG_LOCK)
- seq_printf(p, "L ");
- else
- seq_printf(p, " ");
- seq_printf(p, "%s\n", int_irq_list[i].devname);
- }
- }
- if (i == NR_IRQS)
- seq_printf(p, " : %10u spurious\n", num_spurious);
-
- return 0;
-}
-
-/* The 68k family did not have a good way to determine the source
- * of interrupts until later in the family. The EC000 core does
- * not provide the vector number on the stack, we vector everything
- * into one vector and look in the blasted mask register...
- * This code is designed to be fast, almost constant time, not clean!
- */
-void process_int(int vec, struct pt_regs *fp)
-{
- int irq;
- int mask;
-
- /* unsigned long pend = *(volatile unsigned long *)0xfffff30c; */
-
- /* irq = vec + (CPM_VECTOR_BASE<<4); */
- irq = vec;
-
- /* unsigned long pend = *(volatile unsigned long *)pquicc->intr_cipr; */
-
- /* Bugger all that weirdness. For the moment, I seem to know where I came from;
- * vec is passed from a specific ISR, so I'll use it. */
-
- if (int_irq_list[irq].handler) {
- int_irq_list[irq].handler(irq , int_irq_list[irq].dev_id, fp);
- kstat_cpu(0).irqs[irq]++;
- pquicc->intr_cisr = (1 << vec); /* indicate that irq has been serviced */
- } else {
- printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the CIMR...\n", irq);
- /* *(volatile unsigned long *)0xfffff304 |= mask; */
- pquicc->intr_cimr &= ~(1 << vec);
- num_spurious += 1;
- }
- return(IRQ_HANDLED);
-}
diff -Naur linux-2.6.22/include/asm-m68knommu/irq.h linux-2.6.22-uc0/include/asm-m68knommu/irq.h
--- linux-2.6.22/include/asm-m68knommu/irq.h 2007-07-12 15:21:55.000000000 +1000
+++ linux-2.6.22-uc0/include/asm-m68knommu/irq.h 2007-07-12 15:23:58.000000000 +1000
@@ -1,7 +1,5 @@
-#ifndef _M68K_IRQ_H_
-#define _M68K_IRQ_H_
-
-#include <asm/ptrace.h>
+#ifndef _M68KNOMMU_IRQ_H_
+#define _M68KNOMMU_IRQ_H_
#ifdef CONFIG_COLDFIRE
/*
@@ -17,75 +15,12 @@
/*
* # of m68k interrupts
*/
-#define SYS_IRQS 8
-#define NR_IRQS (24+SYS_IRQS)
+#define SYS_IRQS 8
+#define NR_IRQS (24 + SYS_IRQS)
#endif /* CONFIG_COLDFIRE */
-/*
- * Interrupt source definitions
- * General interrupt sources are the level 1-7.
- * Adding an interrupt service routine for one of these sources
- * results in the addition of that routine to a chain of routines.
- * Each one is called in succession. Each individual interrupt
- * service routine should determine if the device associated with
- * that routine requires service.
- */
-#define IRQ1 (1) /* level 1 interrupt */
-#define IRQ2 (2) /* level 2 interrupt */
-#define IRQ3 (3) /* level 3 interrupt */
-#define IRQ4 (4) /* level 4 interrupt */
-#define IRQ5 (5) /* level 5 interrupt */
-#define IRQ6 (6) /* level 6 interrupt */
-#define IRQ7 (7) /* level 7 interrupt (non-maskable) */
-
-/*
- * Machine specific interrupt sources.
- *
- * Adding an interrupt service routine for a source with this bit
- * set indicates a special machine specific interrupt source.
- * The machine specific files define these sources.
- *
- * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
- * introduce unnecessary overhead.
- *
- * All interrupt handling is actually machine specific so it is better
- * to use function pointers, as used by the Sparc port, and select the
- * interrupt handling functions when initializing the kernel. This way
- * we save some unnecessary overhead at run-time.
- * 01/11/97 - Jes
- */
-
-extern void (*mach_enable_irq)(unsigned int);
-extern void (*mach_disable_irq)(unsigned int);
-
-/*
- * various flags for request_irq() - the Amiga now uses the standard
- * mechanism like all other architectures - IRQF_DISABLED and
- * IRQF_SHARED are your friends.
- */
-#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
-#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
-#define IRQ_FLG_FAST (0x0004)
-#define IRQ_FLG_SLOW (0x0008)
-#define IRQ_FLG_STD (0x8000) /* internally used */
-
-#ifdef CONFIG_M68360
-
-#define CPM_INTERRUPT IRQ4
-
-/* see MC68360 User's Manual, p. 7-377 */
-#define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */
-
-#endif /* CONFIG_M68360 */
-
-/*
- * Some drivers want these entry points
- */
-#define enable_irq(x) do { } while (0)
-#define disable_irq(x) do { } while (0)
-#define disable_irq_nosync(x) disable_irq(x)
#define irq_canonicalize(irq) (irq)
-#endif /* _M68K_IRQ_H_ */
+#endif /* _M68KNOMMU_IRQ_H_ */
diff -Naur linux-2.6.22/include/asm-m68knommu/irqnode.h linux-2.6.22-uc0/include/asm-m68knommu/irqnode.h
--- linux-2.6.22/include/asm-m68knommu/irqnode.h 2007-07-12 15:21:55.000000000 +1000
+++ linux-2.6.22-uc0/include/asm-m68knommu/irqnode.h 1970-01-01 10:00:00.000000000 +1000
@@ -1,36 +0,0 @@
-#ifndef _M68K_IRQNODE_H_
-#define _M68K_IRQNODE_H_
-
-#include <linux/interrupt.h>
-
-/*
- * This structure is used to chain together the ISRs for a particular
- * interrupt source (if it supports chaining).
- */
-typedef struct irq_node {
- irq_handler_t handler;
- unsigned long flags;
- void *dev_id;
- const char *devname;
- struct irq_node *next;
-} irq_node_t;
-
-/*
- * This structure has only 4 elements for speed reasons
- */
-struct irq_entry {
- irq_handler_t handler;
- unsigned long flags;
- void *dev_id;
- const char *devname;
-};
-
-/* count of spurious interrupts */
-extern volatile unsigned int num_spurious;
-
-/*
- * This function returns a new irq_node_t
- */
-extern irq_node_t *new_irq_node(void);
-
-#endif /* _M68K_IRQNODE_H_ */
diff -Naur linux-2.6.22/include/asm-m68knommu/m68360.h linux-2.6.22-uc0/include/asm-m68knommu/m68360.h
--- linux-2.6.22/include/asm-m68knommu/m68360.h 2007-07-12 15:21:55.000000000 +1000
+++ linux-2.6.22-uc0/include/asm-m68knommu/m68360.h 2007-07-12 15:23:59.000000000 +1000
@@ -3,3 +3,11 @@
#include "m68360_quicc.h"
#include "m68360_enet.h"
+#ifdef CONFIG_M68360
+
+#define CPM_INTERRUPT 4
+
+/* see MC68360 User's Manual, p. 7-377 */
+#define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */
+
+#endif /* CONFIG_M68360 */
diff -Naur linux-2.6.22/include/asm-m68knommu/traps.h linux-2.6.22-uc0/include/asm-m68knommu/traps.h
--- linux-2.6.22/include/asm-m68knommu/traps.h 2007-07-12 15:21:55.000000000 +1000
+++ linux-2.6.22-uc0/include/asm-m68knommu/traps.h 2007-07-12 15:23:58.000000000 +1000
@@ -16,6 +16,10 @@
typedef void (*e_vector)(void);
extern e_vector vectors[];
+extern void init_vectors(void);
+extern void enable_vector(unsigned int irq);
+extern void disable_vector(unsigned int irq);
+extern void ack_vector(unsigned int irq);
#endif
-
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