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m68knommu: generic irq handling 

Change the m68knommu irq handling to use the generic irq framework.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Greg Ungerer 2007-07-19 01:49:12 -07:00 committed by Linus Torvalds
parent f8af0bb890
commit 2502b667ea
17 changed files with 172 additions and 779 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/m68knommu/Kconfig
View File

@ -45,6 +45,10 @@ config GENERIC_HWEIGHT
bool
default y
config GENERIC_HARDIRQS
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y

4
arch/m68knommu/kernel/Makefile
View File

@ -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

5
arch/m68knommu/kernel/asm-offsets.c
View File

@ -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 @@ int main(void)
#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 */

82
arch/m68knommu/kernel/irq.c Normal file
View File

@ -0,0 +1,82 @@
/*
* irq.c
*
* (C) Copyright 2007, Greg Ungerer <gerg@snapgear.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;
}

2
arch/m68knommu/kernel/traps.c
View File

@ -62,8 +62,6 @@ static char const * const vec_names[] = {
void __init trap_init(void)
{
if (mach_trap_init)
mach_trap_init();
}
void die_if_kernel(char *str, struct pt_regs *fp, int nr)

2
arch/m68knommu/platform/5307/Makefile
View File

@ -16,7 +16,7 @@ ifdef CONFIG_FULLDEBUG
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

42
arch/m68knommu/platform/5307/entry.S
View File

@ -1,7 +1,7 @@
/*
* linux/arch/m68knommu/platform/5307/entry.S
*
* Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
* Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
* Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
* Kenneth Albanowski <kjahds@kjahds.com>,
* Copyright (C) 2000 Lineo Inc. (www.lineo.com)
@ -155,34 +155,21 @@ Lsignal_return:
/*
* 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 +185,15 @@ ENTRY(fasthandler)
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

279
arch/m68knommu/platform/5307/ints.c
View File

@ -1,279 +0,0 @@
/*
* linux/arch/m68knommu/kernel/ints.c -- General interrupt handling code
*
* Copyright (C) 1999-2002 Greg Ungerer (gerg@snapgear.com)
* Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
* Kenneth Albanowski <kjahds@kjahds.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 */
}

29
arch/m68knommu/platform/5307/vectors.c
View File

@ -3,23 +3,17 @@
/*
* linux/arch/m68knommu/platform/5307/vectors.c
*
* Copyright (C) 1999-2003, Greg Ungerer <gerg@snapgear.com>
* Copyright (C) 1999-2007, Greg Ungerer <gerg@snapgear.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 trap(void);
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 __init coldfire_trap_init(void)
/***************************************************************************/
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();

10
arch/m68knommu/platform/68328/entry.S
View File

@ -133,7 +133,6 @@ Lreturn:
*/
inthandler1:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -145,7 +144,6 @@ inthandler1:
inthandler2:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -157,7 +155,6 @@ inthandler2:
inthandler3:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -169,7 +166,6 @@ inthandler3:
inthandler4:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -181,7 +177,6 @@ inthandler4:
inthandler5:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -193,7 +188,6 @@ inthandler5:
inthandler6:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -205,7 +199,6 @@ inthandler6:
inthandler7:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -217,7 +210,6 @@ inthandler7:
inthandler:
SAVE_ALL
addql #1,local_irq_count /* put exception # in d0*/
movew %sp@(PT_VECTOR), %d0
and #0x3ff, %d0
@ -228,7 +220,6 @@ inthandler:
bra ret_from_interrupt
ret_from_interrupt:
subql #1,local_irq_count
jeq 1f
2:
RESTORE_ALL
@ -238,7 +229,6 @@ ret_from_interrupt:
jhi 2b
/* check if we need to do software interrupts */
movel local_irq_count,%d0
jeq ret_from_exception
pea ret_from_exception

130
arch/m68knommu/platform/68328/ints.c
View File

@ -9,21 +9,14 @@
* Copyright 1999 D. Jeff Dionne <jeff@rt-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 @@ extern e_vector *_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[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 @@ void init_IRQ(void)
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 @@ void process_int(int vec, struct pt_regs *fp)
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 */
}

6
arch/m68knommu/platform/68360/entry.S
View File

@ -120,23 +120,21 @@ Lreturn:
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

233
arch/m68knommu/platform/68360/ints.c
View File

@ -10,20 +10,13 @@
* Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.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 @@ extern void cpm_interrupt_init(void);
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 @@ void init_IRQ(void)
_ramvec[32] = system_call;
_ramvec[33] = trap;
cpm_interrupt_init();
/* set up CICR for vector base address and irq level */
@ -124,212 +109,20 @@ void init_IRQ(void)
/* 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);
}

75
include/asm-m68knommu/irq.h
View File

@ -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_ */

36
include/asm-m68knommu/irqnode.h
View File

@ -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_ */

8
include/asm-m68knommu/m68360.h
View File

@ -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 */

4
include/asm-m68knommu/traps.h
View File

@ -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