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Diffstat (limited to 'arch/sparc/kernel/irq_32.c')
-rw-r--r--arch/sparc/kernel/irq_32.c229
1 files changed, 92 insertions, 137 deletions
diff --git a/arch/sparc/kernel/irq_32.c b/arch/sparc/kernel/irq_32.c
index 85db35d894fc..974dab046a04 100644
--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
@@ -1,8 +1,8 @@
/*
- * arch/sparc/kernel/irq.c: Interrupt request handling routines. On the
- * Sparc the IRQs are basically 'cast in stone'
- * and you are supposed to probe the prom's device
- * node trees to find out who's got which IRQ.
+ * Interrupt request handling routines. On the
+ * Sparc the IRQs are basically 'cast in stone'
+ * and you are supposed to probe the prom's device
+ * node trees to find out who's got which IRQ.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
@@ -11,40 +11,10 @@
* Copyright (C) 1998-2000 Anton Blanchard (anton@samba.org)
*/
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/linkage.h>
#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/delay.h>
-#include <linux/threads.h>
-#include <linux/spinlock.h>
#include <linux/seq_file.h>
-#include <asm/ptrace.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/psr.h>
-#include <asm/smp.h>
-#include <asm/vaddrs.h>
-#include <asm/timer.h>
-#include <asm/openprom.h>
-#include <asm/oplib.h>
-#include <asm/traps.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
#include <asm/pcic.h>
-#include <asm/cacheflush.h>
-#include <asm/irq_regs.h>
#include <asm/leon.h>
#include "kernel.h"
@@ -57,6 +27,7 @@
#define SMP_NOP2
#define SMP_NOP3
#endif /* SMP */
+
unsigned long arch_local_irq_save(void)
{
unsigned long retval;
@@ -135,8 +106,7 @@ static void irq_panic(void)
prom_halt();
}
-void (*sparc_init_timers)(irq_handler_t ) =
- (void (*)(irq_handler_t )) irq_panic;
+void (*sparc_init_timers)(irq_handler_t) = (void (*)(irq_handler_t))irq_panic;
/*
* Dave Redman (djhr@tadpole.co.uk)
@@ -145,7 +115,7 @@ void (*sparc_init_timers)(irq_handler_t ) =
* instead, because some of the devices attach very early, I do something
* equally sucky but at least we'll never try to free statically allocated
* space or call kmalloc before kmalloc_init :(.
- *
+ *
* In fact it's the timer10 that attaches first.. then timer14
* then kmalloc_init is called.. then the tty interrupts attach.
* hmmm....
@@ -166,22 +136,20 @@ DEFINE_SPINLOCK(irq_action_lock);
int show_interrupts(struct seq_file *p, void *v)
{
- int i = *(loff_t *) v;
- struct irqaction * action;
+ int i = *(loff_t *)v;
+ struct irqaction *action;
unsigned long flags;
#ifdef CONFIG_SMP
int j;
#endif
- if (sparc_cpu_model == sun4d) {
- extern int show_sun4d_interrupts(struct seq_file *, void *);
-
+ if (sparc_cpu_model == sun4d)
return show_sun4d_interrupts(p, v);
- }
+
spin_lock_irqsave(&irq_action_lock, flags);
if (i < NR_IRQS) {
action = sparc_irq[i].action;
- if (!action)
+ if (!action)
goto out_unlock;
seq_printf(p, "%3d: ", i);
#ifndef CONFIG_SMP
@@ -195,7 +163,7 @@ int show_interrupts(struct seq_file *p, void *v)
seq_printf(p, " %c %s",
(action->flags & IRQF_DISABLED) ? '+' : ' ',
action->name);
- for (action=action->next; action; action = action->next) {
+ for (action = action->next; action; action = action->next) {
seq_printf(p, ",%s %s",
(action->flags & IRQF_DISABLED) ? " +" : "",
action->name);
@@ -209,22 +177,20 @@ out_unlock:
void free_irq(unsigned int irq, void *dev_id)
{
- struct irqaction * action;
+ struct irqaction *action;
struct irqaction **actionp;
- unsigned long flags;
+ unsigned long flags;
unsigned int cpu_irq;
-
+
if (sparc_cpu_model == sun4d) {
- extern void sun4d_free_irq(unsigned int, void *);
-
sun4d_free_irq(irq, dev_id);
return;
}
cpu_irq = irq & (NR_IRQS - 1);
- if (cpu_irq > 14) { /* 14 irq levels on the sparc */
- printk("Trying to free bogus IRQ %d\n", irq);
- return;
- }
+ if (cpu_irq > 14) { /* 14 irq levels on the sparc */
+ printk(KERN_ERR "Trying to free bogus IRQ %d\n", irq);
+ return;
+ }
spin_lock_irqsave(&irq_action_lock, flags);
@@ -232,7 +198,7 @@ void free_irq(unsigned int irq, void *dev_id)
action = *actionp;
if (!action->handler) {
- printk("Trying to free free IRQ%d\n",irq);
+ printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
goto out_unlock;
}
if (dev_id) {
@@ -242,19 +208,21 @@ void free_irq(unsigned int irq, void *dev_id)
actionp = &action->next;
}
if (!action) {
- printk("Trying to free free shared IRQ%d\n",irq);
+ printk(KERN_ERR "Trying to free free shared IRQ%d\n",
+ irq);
goto out_unlock;
}
} else if (action->flags & IRQF_SHARED) {
- printk("Trying to free shared IRQ%d with NULL device ID\n", irq);
+ printk(KERN_ERR "Trying to free shared IRQ%d with NULL device ID\n",
+ irq);
goto out_unlock;
}
- if (action->flags & SA_STATIC_ALLOC)
- {
- /* This interrupt is marked as specially allocated
+ if (action->flags & SA_STATIC_ALLOC) {
+ /*
+ * This interrupt is marked as specially allocated
* so it is a bad idea to free it.
*/
- printk("Attempt to free statically allocated IRQ%d (%s)\n",
+ printk(KERN_ERR "Attempt to free statically allocated IRQ%d (%s)\n",
irq, action->name);
goto out_unlock;
}
@@ -275,7 +243,6 @@ void free_irq(unsigned int irq, void *dev_id)
out_unlock:
spin_unlock_irqrestore(&irq_action_lock, flags);
}
-
EXPORT_SYMBOL(free_irq);
/*
@@ -297,44 +264,41 @@ void synchronize_irq(unsigned int irq)
EXPORT_SYMBOL(synchronize_irq);
#endif /* SMP */
-void unexpected_irq(int irq, void *dev_id, struct pt_regs * regs)
+void unexpected_irq(int irq, void *dev_id, struct pt_regs *regs)
{
- int i;
- struct irqaction * action;
+ int i;
+ struct irqaction *action;
unsigned int cpu_irq;
-
+
cpu_irq = irq & (NR_IRQS - 1);
action = sparc_irq[cpu_irq].action;
- printk("IO device interrupt, irq = %d\n", irq);
- printk("PC = %08lx NPC = %08lx FP=%08lx\n", regs->pc,
+ printk(KERN_ERR "IO device interrupt, irq = %d\n", irq);
+ printk(KERN_ERR "PC = %08lx NPC = %08lx FP=%08lx\n", regs->pc,
regs->npc, regs->u_regs[14]);
if (action) {
- printk("Expecting: ");
- for (i = 0; i < 16; i++)
- if (action->handler)
- printk("[%s:%d:0x%x] ", action->name,
- (int) i, (unsigned int) action->handler);
+ printk(KERN_ERR "Expecting: ");
+ for (i = 0; i < 16; i++)
+ if (action->handler)
+ printk(KERN_CONT "[%s:%d:0x%x] ", action->name,
+ i, (unsigned int)action->handler);
}
- printk("AIEEE\n");
+ printk(KERN_ERR "AIEEE\n");
panic("bogus interrupt received");
}
-void handler_irq(int pil, struct pt_regs * regs)
+void handler_irq(int pil, struct pt_regs *regs)
{
struct pt_regs *old_regs;
- struct irqaction * action;
+ struct irqaction *action;
int cpu = smp_processor_id();
-#ifdef CONFIG_SMP
- extern void smp4m_irq_rotate(int cpu);
-#endif
old_regs = set_irq_regs(regs);
irq_enter();
disable_pil_irq(pil);
#ifdef CONFIG_SMP
/* Only rotate on lower priority IRQs (scsi, ethernet, etc.). */
- if((sparc_cpu_model==sun4m) && (pil < 10))
+ if ((sparc_cpu_model==sun4m) && (pil < 10))
smp4m_irq_rotate(cpu);
#endif
action = sparc_irq[pil].action;
@@ -354,7 +318,8 @@ void handler_irq(int pil, struct pt_regs * regs)
#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
-/* Fast IRQs on the Sparc can only have one routine attached to them,
+/*
+ * Fast IRQs on the Sparc can only have one routine attached to them,
* thus no sharing possible.
*/
static int request_fast_irq(unsigned int irq,
@@ -367,15 +332,13 @@ static int request_fast_irq(unsigned int irq,
int ret;
#if defined CONFIG_SMP && !defined CONFIG_SPARC_LEON
struct tt_entry *trap_table;
- extern struct tt_entry trapbase_cpu1, trapbase_cpu2, trapbase_cpu3;
#endif
-
cpu_irq = irq & (NR_IRQS - 1);
- if(cpu_irq > 14) {
+ if (cpu_irq > 14) {
ret = -EINVAL;
goto out;
}
- if(!handler) {
+ if (!handler) {
ret = -EINVAL;
goto out;
}
@@ -383,34 +346,33 @@ static int request_fast_irq(unsigned int irq,
spin_lock_irqsave(&irq_action_lock, flags);
action = sparc_irq[cpu_irq].action;
- if(action) {
- if(action->flags & IRQF_SHARED)
+ if (action) {
+ if (action->flags & IRQF_SHARED)
panic("Trying to register fast irq when already shared.\n");
- if(irqflags & IRQF_SHARED)
+ if (irqflags & IRQF_SHARED)
panic("Trying to register fast irq as shared.\n");
/* Anyway, someone already owns it so cannot be made fast. */
- printk("request_fast_irq: Trying to register yet already owned.\n");
+ printk(KERN_ERR "request_fast_irq: Trying to register yet already owned.\n");
ret = -EBUSY;
goto out_unlock;
}
- /* If this is flagged as statically allocated then we use our
+ /*
+ * If this is flagged as statically allocated then we use our
* private struct which is never freed.
*/
if (irqflags & SA_STATIC_ALLOC) {
- if (static_irq_count < MAX_STATIC_ALLOC)
- action = &static_irqaction[static_irq_count++];
- else
- printk("Fast IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
- irq, devname);
+ if (static_irq_count < MAX_STATIC_ALLOC)
+ action = &static_irqaction[static_irq_count++];
+ else
+ printk(KERN_ERR "Fast IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
+ irq, devname);
}
-
+
if (action == NULL)
- action = kmalloc(sizeof(struct irqaction),
- GFP_ATOMIC);
-
- if (!action) {
+ action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
+ if (!action) {
ret = -ENOMEM;
goto out_unlock;
}
@@ -426,9 +388,12 @@ static int request_fast_irq(unsigned int irq,
INSTANTIATE(sparc_ttable)
#if defined CONFIG_SMP && !defined CONFIG_SPARC_LEON
- trap_table = &trapbase_cpu1; INSTANTIATE(trap_table)
- trap_table = &trapbase_cpu2; INSTANTIATE(trap_table)
- trap_table = &trapbase_cpu3; INSTANTIATE(trap_table)
+ trap_table = &trapbase_cpu1;
+ INSTANTIATE(trap_table)
+ trap_table = &trapbase_cpu2;
+ INSTANTIATE(trap_table)
+ trap_table = &trapbase_cpu3;
+ INSTANTIATE(trap_table)
#endif
#undef INSTANTIATE
/*
@@ -454,7 +419,8 @@ out:
return ret;
}
-/* These variables are used to access state from the assembler
+/*
+ * These variables are used to access state from the assembler
* interrupt handler, floppy_hardint, so we cannot put these in
* the floppy driver image because that would not work in the
* modular case.
@@ -477,8 +443,6 @@ EXPORT_SYMBOL(pdma_base);
unsigned long pdma_areasize;
EXPORT_SYMBOL(pdma_areasize);
-extern void floppy_hardint(void);
-
static irq_handler_t floppy_irq_handler;
void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
@@ -494,9 +458,11 @@ void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
irq_exit();
enable_pil_irq(irq);
set_irq_regs(old_regs);
- // XXX Eek, it's totally changed with preempt_count() and such
- // if (softirq_pending(cpu))
- // do_softirq();
+ /*
+ * XXX Eek, it's totally changed with preempt_count() and such
+ * if (softirq_pending(cpu))
+ * do_softirq();
+ */
}
int sparc_floppy_request_irq(int irq, unsigned long flags,
@@ -511,21 +477,18 @@ EXPORT_SYMBOL(sparc_floppy_request_irq);
int request_irq(unsigned int irq,
irq_handler_t handler,
- unsigned long irqflags, const char * devname, void *dev_id)
+ unsigned long irqflags, const char *devname, void *dev_id)
{
- struct irqaction * action, **actionp;
+ struct irqaction *action, **actionp;
unsigned long flags;
unsigned int cpu_irq;
int ret;
-
- if (sparc_cpu_model == sun4d) {
- extern int sun4d_request_irq(unsigned int,
- irq_handler_t ,
- unsigned long, const char *, void *);
+
+ if (sparc_cpu_model == sun4d)
return sun4d_request_irq(irq, handler, irqflags, devname, dev_id);
- }
+
cpu_irq = irq & (NR_IRQS - 1);
- if(cpu_irq > 14) {
+ if (cpu_irq > 14) {
ret = -EINVAL;
goto out;
}
@@ -533,7 +496,7 @@ int request_irq(unsigned int irq,
ret = -EINVAL;
goto out;
}
-
+
spin_lock_irqsave(&irq_action_lock, flags);
actionp = &sparc_irq[cpu_irq].action;
@@ -544,7 +507,8 @@ int request_irq(unsigned int irq,
goto out_unlock;
}
if ((action->flags & IRQF_DISABLED) != (irqflags & IRQF_DISABLED)) {
- printk("Attempt to mix fast and slow interrupts on IRQ%d denied\n", irq);
+ printk(KERN_ERR "Attempt to mix fast and slow interrupts on IRQ%d denied\n",
+ irq);
ret = -EBUSY;
goto out_unlock;
}
@@ -559,14 +523,12 @@ int request_irq(unsigned int irq,
if (static_irq_count < MAX_STATIC_ALLOC)
action = &static_irqaction[static_irq_count++];
else
- printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n", irq, devname);
+ printk(KERN_ERR "Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
+ irq, devname);
}
-
if (action == NULL)
- action = kmalloc(sizeof(struct irqaction),
- GFP_ATOMIC);
-
- if (!action) {
+ action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
+ if (!action) {
ret = -ENOMEM;
goto out_unlock;
}
@@ -587,7 +549,6 @@ out_unlock:
out:
return ret;
}
-
EXPORT_SYMBOL(request_irq);
void disable_irq_nosync(unsigned int irq)
@@ -606,24 +567,22 @@ void enable_irq(unsigned int irq)
{
__enable_irq(irq);
}
-
EXPORT_SYMBOL(enable_irq);
-/* We really don't need these at all on the Sparc. We only have
+/*
+ * We really don't need these at all on the Sparc. We only have
* stubs here because they are exported to modules.
*/
unsigned long probe_irq_on(void)
{
return 0;
}
-
EXPORT_SYMBOL(probe_irq_on);
int probe_irq_off(unsigned long mask)
{
return 0;
}
-
EXPORT_SYMBOL(probe_irq_off);
/* djhr
@@ -636,11 +595,7 @@ EXPORT_SYMBOL(probe_irq_off);
void __init init_IRQ(void)
{
- extern void sun4c_init_IRQ( void );
- extern void sun4m_init_IRQ( void );
- extern void sun4d_init_IRQ( void );
-
- switch(sparc_cpu_model) {
+ switch (sparc_cpu_model) {
case sun4c:
case sun4:
sun4c_init_IRQ();
@@ -656,7 +611,7 @@ void __init init_IRQ(void)
#endif
sun4m_init_IRQ();
break;
-
+
case sun4d:
sun4d_init_IRQ();
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 15:18:47 +0000