[patch 4/5, 2.6.9-rc3] generic irq subsystem, ppc port
From: Ingo Molnar
Date: Fri Oct 01 2004 - 16:33:05 EST
ppc32 port of generic hardirq handling.
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
--- linux/arch/ppc/Kconfig.orig
+++ linux/arch/ppc/Kconfig
@@ -11,6 +11,10 @@ config MMU
config UID16
bool
+config GENERIC_HARDIRQS
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
--- linux/arch/ppc/syslib/ppc8xx_pic.c.orig
+++ linux/arch/ppc/syslib/ppc8xx_pic.c
@@ -105,7 +105,7 @@ m8xx_do_IRQ(struct pt_regs *regs,
ppc_spurious_interrupts++;
}
else {
- ppc_irq_dispatch_handler( regs, irq );
+ __do_IRQ(irq, regs);
}
}
@@ -161,7 +161,7 @@ void mbx_i8259_action(int cpl, void *dev
}
bits = 1UL << irq;
irq += i8259_pic.irq_offset;
- ppc_irq_dispatch_handler( regs, irq );
+ __do_IRQ(irq, regs);
}
#endif
--- linux/arch/ppc/kernel/ppc_ksyms.c.orig
+++ linux/arch/ppc/kernel/ppc_ksyms.c
@@ -84,10 +84,6 @@ EXPORT_SYMBOL(SingleStepException);
EXPORT_SYMBOL(sys_sigreturn);
EXPORT_SYMBOL(ppc_n_lost_interrupts);
EXPORT_SYMBOL(ppc_lost_interrupts);
-EXPORT_SYMBOL(enable_irq);
-EXPORT_SYMBOL(disable_irq);
-EXPORT_SYMBOL(disable_irq_nosync);
-EXPORT_SYMBOL(probe_irq_mask);
EXPORT_SYMBOL(ISA_DMA_THRESHOLD);
EXPORT_SYMBOL(DMA_MODE_READ);
@@ -205,7 +201,6 @@ EXPORT_SYMBOL(giveup_spe);
#ifdef CONFIG_SMP
EXPORT_SYMBOL(smp_call_function);
EXPORT_SYMBOL(smp_hw_index);
-EXPORT_SYMBOL(synchronize_irq);
#endif
EXPORT_SYMBOL(ppc_md);
@@ -292,8 +287,6 @@ EXPORT_SYMBOL(local_irq_restore_end);
#endif
EXPORT_SYMBOL(timer_interrupt);
EXPORT_SYMBOL(irq_desc);
-void ppc_irq_dispatch_handler(struct pt_regs *, int);
-EXPORT_SYMBOL(ppc_irq_dispatch_handler);
EXPORT_SYMBOL(tb_ticks_per_jiffy);
EXPORT_SYMBOL(get_wchan);
EXPORT_SYMBOL(console_drivers);
--- linux/arch/ppc/kernel/irq.c.orig
+++ linux/arch/ppc/kernel/irq.c
@@ -62,296 +62,15 @@
extern atomic_t ipi_recv;
extern atomic_t ipi_sent;
-void enable_irq(unsigned int irq_nr);
-void disable_irq(unsigned int irq_nr);
-
-static void register_irq_proc (unsigned int irq);
#define MAXCOUNT 10000000
-irq_desc_t irq_desc[NR_IRQS] __cacheline_aligned = {
- [0 ... NR_IRQS-1] = {
- .lock = SPIN_LOCK_UNLOCKED
- }
-};
-
int ppc_spurious_interrupts = 0;
struct irqaction *ppc_irq_action[NR_IRQS];
unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
atomic_t ppc_n_lost_interrupts;
-/* nasty hack for shared irq's since we need to do kmalloc calls but
- * can't very early in the boot when we need to do a request irq.
- * this needs to be removed.
- * -- Cort
- */
-#define IRQ_KMALLOC_ENTRIES 8
-static int cache_bitmask = 0;
-static struct irqaction malloc_cache[IRQ_KMALLOC_ENTRIES];
-extern int mem_init_done;
-
-#if defined(CONFIG_TAU_INT)
-extern int tau_interrupts(unsigned long cpu);
-extern int tau_initialized;
-#endif
-
-void *irq_kmalloc(size_t size, int pri)
-{
- unsigned int i;
- if ( mem_init_done )
- return kmalloc(size,pri);
- for ( i = 0; i < IRQ_KMALLOC_ENTRIES ; i++ )
- if ( ! ( cache_bitmask & (1<<i) ) )
- {
- cache_bitmask |= (1<<i);
- return (void *)(&malloc_cache[i]);
- }
- return NULL;
-}
-
-void irq_kfree(void *ptr)
-{
- unsigned int i;
- for ( i = 0 ; i < IRQ_KMALLOC_ENTRIES ; i++ )
- if ( ptr == &malloc_cache[i] )
- {
- cache_bitmask &= ~(1<<i);
- return;
- }
- kfree(ptr);
-}
-
-int
-setup_irq(unsigned int irq, struct irqaction * new)
-{
- int shared = 0;
- unsigned long flags;
- struct irqaction *old, **p;
- irq_desc_t *desc = irq_desc + irq;
-
- /*
- * Some drivers like serial.c use request_irq() heavily,
- * so we have to be careful not to interfere with a
- * running system.
- */
- if (new->flags & SA_SAMPLE_RANDOM) {
- /*
- * This function might sleep, we want to call it first,
- * outside of the atomic block.
- * Yes, this might clear the entropy pool if the wrong
- * driver is attempted to be loaded, without actually
- * installing a new handler, but is this really a problem,
- * only the sysadmin is able to do this.
- */
- rand_initialize_irq(irq);
- }
-
- /*
- * The following block of code has to be executed atomically
- */
- spin_lock_irqsave(&desc->lock,flags);
- p = &desc->action;
- if ((old = *p) != NULL) {
- /* Can't share interrupts unless both agree to */
- if (!(old->flags & new->flags & SA_SHIRQ)) {
- spin_unlock_irqrestore(&desc->lock,flags);
- return -EBUSY;
- }
-
- /* add new interrupt at end of irq queue */
- do {
- p = &old->next;
- old = *p;
- } while (old);
- shared = 1;
- }
-
- *p = new;
-
- if (!shared) {
- desc->depth = 0;
- desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT | IRQ_WAITING);
- if (desc->handler) {
- if (desc->handler->startup)
- desc->handler->startup(irq);
- else if (desc->handler->enable)
- desc->handler->enable(irq);
- }
- }
- spin_unlock_irqrestore(&desc->lock,flags);
-
- register_irq_proc(irq);
- return 0;
-}
-
-void free_irq(unsigned int irq, void* dev_id)
-{
- irq_desc_t *desc;
- struct irqaction **p;
- unsigned long flags;
-
- desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock,flags);
- p = &desc->action;
- for (;;) {
- struct irqaction * action = *p;
- if (action) {
- struct irqaction **pp = p;
- p = &action->next;
- if (action->dev_id != dev_id)
- continue;
-
- /* Found it - now remove it from the list of entries */
- *pp = action->next;
- if (!desc->action) {
- desc->status |= IRQ_DISABLED;
- mask_irq(irq);
- }
- spin_unlock_irqrestore(&desc->lock,flags);
-
- synchronize_irq(irq);
- irq_kfree(action);
- return;
- }
- printk("Trying to free free IRQ%d\n",irq);
- spin_unlock_irqrestore(&desc->lock,flags);
- break;
- }
- return;
-}
-
-EXPORT_SYMBOL(free_irq);
-
-int request_irq(unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char * devname, void *dev_id)
-{
- struct irqaction *action;
- int retval;
-
- if (irq >= NR_IRQS)
- return -EINVAL;
- if (!handler) {
- printk(KERN_ERR "request_irq called with NULL handler!\n");
- dump_stack();
- return 0;
- }
-
- action = (struct irqaction *)
- irq_kmalloc(sizeof(struct irqaction), GFP_KERNEL);
- if (!action) {
- printk(KERN_ERR "irq_kmalloc() failed for irq %d !\n", irq);
- return -ENOMEM;
- }
-
- action->handler = handler;
- action->flags = irqflags;
- cpus_clear(action->mask);
- action->name = devname;
- action->dev_id = dev_id;
- action->next = NULL;
-
- retval = setup_irq(irq, action);
- if (retval) {
- kfree(action);
- return retval;
- }
-
- return 0;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-/*
- * Generic enable/disable code: this just calls
- * down into the PIC-specific version for the actual
- * hardware disable after having gotten the irq
- * controller lock.
- */
-
-/**
- * disable_irq_nosync - disable an irq without waiting
- * @irq: Interrupt to disable
- *
- * Disable the selected interrupt line. Disables of an interrupt
- * stack. Unlike disable_irq(), this function does not ensure existing
- * instances of the IRQ handler have completed before returning.
- *
- * This function may be called from IRQ context.
- */
-
-void disable_irq_nosync(unsigned int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&desc->lock, flags);
- if (!desc->depth++) {
- if (!(desc->status & IRQ_PER_CPU))
- desc->status |= IRQ_DISABLED;
- mask_irq(irq);
- }
- spin_unlock_irqrestore(&desc->lock, flags);
-}
-
-/**
- * disable_irq - disable an irq and wait for completion
- * @irq: Interrupt to disable
- *
- * Disable the selected interrupt line. Disables of an interrupt
- * stack. That is for two disables you need two enables. This
- * function waits for any pending IRQ handlers for this interrupt
- * to complete before returning. If you use this function while
- * holding a resource the IRQ handler may need you will deadlock.
- *
- * This function may be called - with care - from IRQ context.
- */
-
-void disable_irq(unsigned int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
- disable_irq_nosync(irq);
- if (desc->action)
- synchronize_irq(irq);
-}
-
-/**
- * enable_irq - enable interrupt handling on an irq
- * @irq: Interrupt to enable
- *
- * Re-enables the processing of interrupts on this IRQ line
- * providing no disable_irq calls are now in effect.
- *
- * This function may be called from IRQ context.
- */
-
-void enable_irq(unsigned int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&desc->lock, flags);
- switch (desc->depth) {
- case 1: {
- unsigned int status = desc->status & ~IRQ_DISABLED;
- desc->status = status;
- if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
- desc->status = status | IRQ_REPLAY;
- hw_resend_irq(desc->handler,irq);
- }
- unmask_irq(irq);
- /* fall-through */
- }
- default:
- desc->depth--;
- break;
- case 0:
- printk("enable_irq(%u) unbalanced\n", irq);
- }
- spin_unlock_irqrestore(&desc->lock, flags);
-}
-
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
@@ -411,115 +130,6 @@ skip:
return 0;
}
-static inline void
-handle_irq_event(int irq, struct pt_regs *regs, struct irqaction *action)
-{
- int status = 0;
- int ret;
-
- if (!(action->flags & SA_INTERRUPT))
- local_irq_enable();
-
- do {
- ret = action->handler(irq, action->dev_id, regs);
- if (ret == IRQ_HANDLED)
- status |= action->flags;
- action = action->next;
- } while (action);
- if (status & SA_SAMPLE_RANDOM)
- add_interrupt_randomness(irq);
- local_irq_disable();
-}
-
-/*
- * Eventually, this should take an array of interrupts and an array size
- * so it can dispatch multiple interrupts.
- */
-void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq)
-{
- int status;
- struct irqaction *action;
- irq_desc_t *desc = irq_desc + irq;
-
- kstat_this_cpu.irqs[irq]++;
- spin_lock(&desc->lock);
- ack_irq(irq);
- /*
- REPLAY is when Linux resends an IRQ that was dropped earlier
- WAITING is used by probe to mark irqs that are being tested
- */
- status = desc->status & ~(IRQ_REPLAY | IRQ_WAITING);
- if (!(status & IRQ_PER_CPU))
- status |= IRQ_PENDING; /* we _want_ to handle it */
-
- /*
- * If the IRQ is disabled for whatever reason, we cannot
- * use the action we have.
- */
- action = NULL;
- if (likely(!(status & (IRQ_DISABLED | IRQ_INPROGRESS)))) {
- action = desc->action;
- if (!action || !action->handler) {
- ppc_spurious_interrupts++;
- printk(KERN_DEBUG "Unhandled interrupt %x, disabled\n", irq);
- /* We can't call disable_irq here, it would deadlock */
- ++desc->depth;
- desc->status |= IRQ_DISABLED;
- mask_irq(irq);
- /* This is a real interrupt, we have to eoi it,
- so we jump to out */
- goto out;
- }
- status &= ~IRQ_PENDING; /* we commit to handling */
- if (!(status & IRQ_PER_CPU))
- status |= IRQ_INPROGRESS; /* we are handling it */
- }
- desc->status = status;
-
- /*
- * If there is no IRQ handler or it was disabled, exit early.
- Since we set PENDING, if another processor is handling
- a different instance of this same irq, the other processor
- will take care of it.
- */
- if (unlikely(!action))
- goto out;
-
-
- /*
- * Edge triggered interrupts need to remember
- * pending events.
- * This applies to any hw interrupts that allow a second
- * instance of the same irq to arrive while we are in do_IRQ
- * or in the handler. But the code here only handles the _second_
- * instance of the irq, not the third or fourth. So it is mostly
- * useful for irq hardware that does not mask cleanly in an
- * SMP environment.
- */
- for (;;) {
- spin_unlock(&desc->lock);
- handle_irq_event(irq, regs, action);
- spin_lock(&desc->lock);
-
- if (likely(!(desc->status & IRQ_PENDING)))
- break;
- desc->status &= ~IRQ_PENDING;
- }
-out:
- desc->status &= ~IRQ_INPROGRESS;
- /*
- * The ->end() handler has to deal with interrupts which got
- * disabled while the handler was running.
- */
- if (irq_desc[irq].handler) {
- if (irq_desc[irq].handler->end)
- irq_desc[irq].handler->end(irq);
- else if (irq_desc[irq].handler->enable)
- irq_desc[irq].handler->enable(irq);
- }
- spin_unlock(&desc->lock);
-}
-
void do_IRQ(struct pt_regs *regs)
{
int irq, first = 1;
@@ -534,7 +144,7 @@ void do_IRQ(struct pt_regs *regs)
* has already been handled. -- Tom
*/
while ((irq = ppc_md.get_irq(regs)) >= 0) {
- ppc_irq_dispatch_handler(regs, irq);
+ __do_IRQ(irq, regs);
first = 0;
}
if (irq != -2 && first)
@@ -543,143 +153,7 @@ void do_IRQ(struct pt_regs *regs)
irq_exit();
}
-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);
-
-unsigned int probe_irq_mask(unsigned long irqs)
-{
- return 0;
-}
-
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int irq)
-{
- while (irq_desc[irq].status & IRQ_INPROGRESS)
- barrier();
-}
-#endif /* CONFIG_SMP */
-
-static struct proc_dir_entry *root_irq_dir;
-static struct proc_dir_entry *irq_dir[NR_IRQS];
-static struct proc_dir_entry *smp_affinity_entry[NR_IRQS];
-
-#ifdef CONFIG_IRQ_ALL_CPUS
-#define DEFAULT_CPU_AFFINITY CPU_MASK_ALL
-#else
-#define DEFAULT_CPU_AFFINITY cpumask_of_cpu(0)
-#endif
-
-cpumask_t irq_affinity [NR_IRQS];
-
-static int irq_affinity_read_proc (char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- int len = cpumask_scnprintf(page, count, irq_affinity[(long)data]);
- if (count - len < 2)
- return -EINVAL;
- len += sprintf(page + len, "\n");
- return len;
-}
-
-static int irq_affinity_write_proc (struct file *file, const char __user *buffer,
- unsigned long count, void *data)
-{
- int irq = (int) data, full_count = count, err;
- cpumask_t new_value, tmp;
-
- if (!irq_desc[irq].handler->set_affinity)
- return -EIO;
-
- err = cpumask_parse(buffer, count, new_value);
-
- /*
- * Do not allow disabling IRQs completely - it's a too easy
- * way to make the system unusable accidentally :-) At least
- * one online CPU still has to be targeted.
- *
- * We assume a 1-1 logical<->physical cpu mapping here. If
- * we assume that the cpu indices in /proc/irq/../smp_affinity
- * are actually logical cpu #'s then we have no problem.
- * -- Cort <cort@xxxxxxxxxxx>
- */
- cpus_and(tmp, new_value, cpu_online_map);
- if (cpus_empty(tmp))
- return -EINVAL;
-
- irq_affinity[irq] = new_value;
- irq_desc[irq].handler->set_affinity(irq, new_value);
-
- return full_count;
-}
-
-#define MAX_NAMELEN 10
-
-static void register_irq_proc (unsigned int irq)
-{
- struct proc_dir_entry *entry;
- char name [MAX_NAMELEN];
-
- if (!root_irq_dir || (irq_desc[irq].handler == NULL) || irq_dir[irq])
- return;
-
- memset(name, 0, MAX_NAMELEN);
- sprintf(name, "%d", irq);
-
- /* create /proc/irq/1234 */
- irq_dir[irq] = proc_mkdir(name, root_irq_dir);
-
- /* create /proc/irq/1234/smp_affinity */
- entry = create_proc_entry("smp_affinity", 0600, irq_dir[irq]);
-
- entry->nlink = 1;
- entry->data = (void *)irq;
- entry->read_proc = irq_affinity_read_proc;
- entry->write_proc = irq_affinity_write_proc;
-
- smp_affinity_entry[irq] = entry;
-}
-
-void init_irq_proc (void)
-{
- int i;
-
- /* create /proc/irq */
- root_irq_dir = proc_mkdir("irq", NULL);
- /* create /proc/irq/prof_cpu_mask */
- create_prof_cpu_mask(root_irq_dir);
-
- /*
- * Create entries for all existing IRQs.
- */
- for (i = 0; i < NR_IRQS; i++) {
- if (irq_desc[i].handler == NULL)
- continue;
- register_irq_proc(i);
- }
-}
-
-irqreturn_t no_action(int irq, void *dev, struct pt_regs *regs)
-{
- return IRQ_NONE;
-}
-
void __init init_IRQ(void)
{
- int i;
-
- for (i = 0; i < NR_IRQS; ++i)
- irq_affinity[i] = DEFAULT_CPU_AFFINITY;
-
ppc_md.init_IRQ();
}
--- linux/arch/ppc/platforms/pmac_pic.c.orig
+++ linux/arch/ppc/platforms/pmac_pic.c
@@ -214,7 +214,7 @@ static irqreturn_t gatwick_action(int cp
if (bits == 0)
continue;
irq += __ilog2(bits);
- ppc_irq_dispatch_handler(regs, irq);
+ __do_IRQ(irq, regs);
return IRQ_HANDLED;
}
printk("gatwick irq not from gatwick pic\n");
@@ -383,11 +383,34 @@ static irqreturn_t k2u3_action(int cpl,
irq = openpic2_get_irq(regs);
if (irq != -1)
- ppc_irq_dispatch_handler(regs, irq);
+ __do_IRQ(irq, regs);
return IRQ_HANDLED;
}
+
+static struct irqaction k2u3_cascade_action = {
+ .handler = k2u3_action,
+ .flags = 0,
+ .mask = CPU_MASK_NONE,
+ .name = "U3->K2 Cascade",
+};
#endif /* CONFIG_POWER4 */
+#ifdef CONFIG_XMON
+static struct irqaction xmon_action = {
+ .handler = xmon_irq,
+ .flags = 0,
+ .mask = CPU_MASK_NONE,
+ .name = "NMI - XMON"
+};
+#endif
+
+static struct irqaction gatwick_cascade_action = {
+ .handler = gatwick_action,
+ .flags = SA_INTERRUPT,
+ .mask = CPU_MASK_NONE,
+ .name = "cascade",
+};
+
void __init pmac_pic_init(void)
{
int i;
@@ -440,8 +463,9 @@ void __init pmac_pic_init(void)
OpenPIC_InitSenses = senses;
OpenPIC_NumInitSenses = 128;
openpic2_init(PMAC_OPENPIC2_OFFSET);
- if (request_irq(irqctrler2->intrs[0].line, k2u3_action, 0,
- "U3->K2 Cascade", NULL))
+
+ if (setup_irq(irqctrler2->intrs[0].line,
+ &k2u3_cascade_action))
printk("Unable to get OpenPIC IRQ for cascade\n");
}
#endif /* CONFIG_POWER4 */
@@ -455,8 +479,7 @@ void __init pmac_pic_init(void)
if (pswitch && pswitch->n_intrs) {
nmi_irq = pswitch->intrs[0].line;
openpic_init_nmi_irq(nmi_irq);
- request_irq(nmi_irq, xmon_irq, 0,
- "NMI - XMON", NULL);
+ setup_irq(nmi_irq, &xmon_action);
}
}
#endif /* CONFIG_XMON */
@@ -553,8 +576,7 @@ void __init pmac_pic_init(void)
(int)irq_cascade);
for ( i = max_real_irqs ; i < max_irqs ; i++ )
irq_desc[i].handler = &gatwick_pic;
- request_irq( irq_cascade, gatwick_action, SA_INTERRUPT,
- "cascade", NULL );
+ setup_irq(irq_cascade, &gatwick_cascade_action);
}
printk("System has %d possible interrupts\n", max_irqs);
if (max_irqs != max_real_irqs)
@@ -562,7 +584,7 @@ void __init pmac_pic_init(void)
max_real_irqs);
#ifdef CONFIG_XMON
- request_irq(20, xmon_irq, 0, "NMI - XMON", NULL);
+ setup_irq(20, &xmon_action);
#endif /* CONFIG_XMON */
}
--- linux/arch/ppc/platforms/85xx/mpc85xx_cds_common.c.orig
+++ linux/arch/ppc/platforms/85xx/mpc85xx_cds_common.c
@@ -191,9 +191,7 @@ mpc85xx_cds_show_cpuinfo(struct seq_file
static void cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
{
while((irq = cpm2_get_irq(regs)) >= 0)
- {
- ppc_irq_dispatch_handler(regs,irq);
- }
+ __do_IRQ(irq, regs);
}
#endif /* CONFIG_CPM2 */
--- linux/arch/ppc/platforms/85xx/mpc8560_ads.c.orig
+++ linux/arch/ppc/platforms/85xx/mpc8560_ads.c
@@ -145,9 +145,8 @@ mpc8560ads_setup_arch(void)
static irqreturn_t cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
{
- while ((irq = cpm2_get_irq(regs)) >= 0) {
- ppc_irq_dispatch_handler(regs, irq);
- }
+ while ((irq = cpm2_get_irq(regs)) >= 0)
+ __do_IRQ(irq, regs);
return IRQ_HANDLED;
}
--- linux/arch/ppc/platforms/adir_pic.c.orig
+++ linux/arch/ppc/platforms/adir_pic.c
@@ -11,7 +11,7 @@
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/pci.h>
-#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/i8259.h>
@@ -20,11 +20,6 @@
static void adir_onboard_pic_enable(unsigned int irq);
static void adir_onboard_pic_disable(unsigned int irq);
-static void
-no_action(int cpl, void *dev_id, struct pt_regs *regs)
-{
-}
-
__init static void
adir_onboard_pic_init(void)
{
@@ -88,6 +83,13 @@ static struct hw_interrupt_type adir_onb
NULL
};
+static struct irqaction noop_action = {
+ .handler = no_action,
+ .flags = SA_INTERRUPT,
+ .mask = CPU_MASK_NONE,
+ .name = "82c59 primary cascade",
+};
+
/*
* Linux interrupt values are assigned as follows:
*
@@ -110,11 +112,7 @@ adir_init_IRQ(void)
adir_onboard_pic_init();
/* Enable 8259 interrupt cascade */
- request_irq(ADIR_IRQ_VT82C686_INTR,
- no_action,
- SA_INTERRUPT,
- "82c59 primary cascade",
- NULL);
+ setup_irq(ADIR_IRQ_VT82C686_INTR, &noop_action);
}
int
--- linux/arch/ppc/platforms/sbc82xx.c.orig
+++ linux/arch/ppc/platforms/sbc82xx.c
@@ -142,7 +142,7 @@ static irqreturn_t sbc82xx_i8259_demux(i
return IRQ_HANDLED;
}
}
- ppc_irq_dispatch_handler(regs, NR_SIU_INTS + irq);
+ __do_IRQ(NR_SIU_INTS + irq, regs);
return IRQ_HANDLED;
}
--- linux/include/asm-ppc/irq.h.orig
+++ linux/include/asm-ppc/irq.h
@@ -6,10 +6,6 @@
#include <asm/machdep.h> /* ppc_md */
#include <asm/atomic.h>
-extern void disable_irq(unsigned int);
-extern void disable_irq_nosync(unsigned int);
-extern void enable_irq(unsigned int);
-
/*
* These constants are used for passing information about interrupt
* signal polarity and level/edge sensing to the low-level PIC chip
--- linux/include/asm-ppc/hardirq.h.orig
+++ linux/include/asm-ppc/hardirq.h
@@ -21,46 +21,11 @@ typedef struct {
#define last_jiffy_stamp(cpu) __IRQ_STAT((cpu), __last_jiffy_stamp)
-/*
- * We put the hardirq and softirq counter into the preemption
- * counter. The bitmask has the following meaning:
- *
- * - bits 0-7 are the preemption count (max preemption depth: 256)
- * - bits 8-15 are the softirq count (max # of softirqs: 256)
- * - bits 16-23 are the hardirq count (max # of hardirqs: 256)
- *
- * - ( bit 26 is the PREEMPT_ACTIVE flag. )
- *
- * PREEMPT_MASK: 0x000000ff
- * SOFTIRQ_MASK: 0x0000ff00
- * HARDIRQ_MASK: 0x00ff0000
- */
-
-#define PREEMPT_BITS 8
-#define SOFTIRQ_BITS 8
-#define HARDIRQ_BITS 8
-
-#define PREEMPT_SHIFT 0
-#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)
-#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
-
-/*
- * The hardirq mask has to be large enough to have
- * space for potentially all IRQ sources in the system
- * nesting on a single CPU:
- */
-#if (1 << HARDIRQ_BITS) < NR_IRQS
-# error HARDIRQ_BITS is too low!
-#endif
-
-#define irq_enter() (preempt_count() += HARDIRQ_OFFSET)
-#define irq_exit() \
-do { \
- preempt_count() -= IRQ_EXIT_OFFSET; \
- if (!in_interrupt() && softirq_pending(smp_processor_id())) \
- do_softirq(); \
- preempt_enable_no_resched(); \
-} while (0)
+static inline void ack_bad_irq(int irq)
+{
+ printk(KERN_CRIT "illegal vector %d received!\n", irq);
+ BUG();
+}
#endif /* __ASM_HARDIRQ_H */
#endif /* __KERNEL__ */
--- linux/include/asm-ppc/hw_irq.h.orig
+++ linux/include/asm-ppc/hw_irq.h
@@ -9,7 +9,6 @@
#include <asm/reg.h>
extern void timer_interrupt(struct pt_regs *);
-extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
#define INLINE_IRQS
-
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