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* [PATCH] irq handling code consolidation (ppc part)
@ 2003-03-13 13:36 Andrey Panin
  0 siblings, 0 replies; 2+ messages in thread
From: Andrey Panin @ 2003-03-13 13:36 UTC (permalink / raw)
  To: linux-kernel; +Cc: Linus Torvalds, paulus

[-- Attachment #1: Type: text/plain, Size: 214 bytes --]

Hi,

powerpc specific patch for irq handling code consolidation attached.
Compiles, but untested.

Best regards.

-- 
Andrey Panin		| Embedded systems software developer
pazke@orbita1.ru	| PGP key: wwwkeys.pgp.net

[-- Attachment #2: patch-irq-ppc-2.5.64 --]
[-- Type: text/plain, Size: 16069 bytes --]

diff --minimal -urN -X /usr/share/dontdiff linux-2.5.64.vanilla/arch/ppc/Kconfig linux-2.5.64/arch/ppc/Kconfig
--- linux-2.5.64.vanilla/arch/ppc/Kconfig	Mon Mar 10 00:51:07 2003
+++ linux-2.5.64/arch/ppc/Kconfig	Tue Mar 11 10:38:47 2003
@@ -6,6 +6,10 @@
 	bool
 	default y
 
+config GENERIC_IRQ
+	bool
+	default y
+
 config UID16
 	bool
 
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.64.vanilla/arch/ppc/kernel/irq.c linux-2.5.64/arch/ppc/kernel/irq.c
--- linux-2.5.64.vanilla/arch/ppc/kernel/irq.c	Mon Mar 10 00:51:47 2003
+++ linux-2.5.64/arch/ppc/kernel/irq.c	Tue Mar 11 10:38:47 2003
@@ -10,12 +10,6 @@
  *  Adapted for Power Macintosh by Paul Mackerras
  *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
  *  Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
- *  
- * This file contains the code used by various IRQ handling routines:
- * asking for different IRQ's should be done through these routines
- * instead of just grabbing them. Thus setups with different IRQ numbers
- * shouldn't result in any weird surprises, and installing new handlers
- * should be easier.
  *
  * The MPC8xx has an interrupt mask in the SIU.  If a bit is set, the
  * interrupt is _enabled_.  As expected, IRQ0 is bit 0 in the 32-bit
@@ -26,322 +20,41 @@
  * to reduce code space and undefined function references.
  */
 
-#include <linux/errno.h>
+#include <linux/config.h>
 #include <linux/threads.h>
 #include <linux/kernel_stat.h>
 #include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ptrace.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/config.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/irq.h>
-#include <linux/proc_fs.h>
-#include <linux/random.h>
 #include <linux/seq_file.h>
 
-#include <asm/uaccess.h>
-#include <asm/bitops.h>
-#include <asm/system.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>
 #include <asm/irq.h>
 #include <asm/cache.h>
 #include <asm/prom.h>
-#include <asm/ptrace.h>
 
 #define NR_MASK_WORDS	((NR_IRQS + 31) / 32)
 
 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] = { 0, NULL, NULL, 0, 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 0;
-}
-
-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);
-		unmask_irq(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;
-}
-
-int request_irq(unsigned int irq, void (*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)
-	{
-		/*
-		 * free_irq() used to be implemented as a call to
-		 * request_irq() with handler being NULL.  Now we have
-		 * a real free_irq() but need to allow the old behavior
-		 * for old code that hasn't caught up yet.
-		 *  -- Cort <cort@fsmlabs.com>
-		 */
-		free_irq(irq, dev_id);
-		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;					
-	action->mask = 0;
-	action->name = devname;
-	action->dev_id = dev_id;
-	action->next = NULL;
-	
-	retval = setup_irq(irq, action);
-	if (retval)
-	{
-		kfree(action);
-		return retval;
-	}
-		
-	return 0;
-}
-
-/*
- * 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)
-{
-	disable_irq_nosync(irq);
-	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, j;
@@ -394,24 +107,6 @@
 	return 0;
 }
 
-static inline void
-handle_irq_event(int irq, struct pt_regs *regs, struct irqaction *action)
-{
-	int status = 0;
-
-	if (!(action->flags & SA_INTERRUPT))
-		local_irq_enable();
-
-	do {
-		status |= action->flags;
-		action->handler(irq, action->dev_id, regs);
-		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.
@@ -480,7 +175,7 @@
 	 */
 	for (;;) {
 		spin_unlock(&desc->lock);
-		handle_irq_event(irq, regs, action);
+		handle_IRQ_event(irq, regs, action);
 		spin_lock(&desc->lock);
 		
 		if (likely(!(desc->status & IRQ_PENDING)))
@@ -550,184 +245,4 @@
 		once++;
 	
 	ppc_md.init_IRQ();
-}
-
-#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 0xffffffff
-#else
-#define DEFAULT_CPU_AFFINITY 0x00000001
-#endif
-
-unsigned int irq_affinity [NR_IRQS] =
-	{ [0 ... NR_IRQS-1] = DEFAULT_CPU_AFFINITY };
-
-#define HEX_DIGITS 8
-
-static int irq_affinity_read_proc (char *page, char **start, off_t off,
-			int count, int *eof, void *data)
-{
-	if (count < HEX_DIGITS+1)
-		return -EINVAL;
-	return sprintf (page, "%08x\n", irq_affinity[(int)data]);
-}
-
-static unsigned int parse_hex_value (const char *buffer,
-		unsigned long count, unsigned long *ret)
-{
-	unsigned char hexnum [HEX_DIGITS];
-	unsigned long value;
-	int i;
-
-	if (!count)
-		return -EINVAL;
-	if (count > HEX_DIGITS)
-		count = HEX_DIGITS;
-	if (copy_from_user(hexnum, buffer, count))
-		return -EFAULT;
-
-	/*
-	 * Parse the first 8 characters as a hex string, any non-hex char
-	 * is end-of-string. '00e1', 'e1', '00E1', 'E1' are all the same.
-	 */
-	value = 0;
-
-	for (i = 0; i < count; i++) {
-		unsigned int c = hexnum[i];
-
-		switch (c) {
-			case '0' ... '9': c -= '0'; break;
-			case 'a' ... 'f': c -= 'a'-10; break;
-			case 'A' ... 'F': c -= 'A'-10; break;
-		default:
-			goto out;
-		}
-		value = (value << 4) | c;
-	}
-out:
-	*ret = value;
-	return 0;
-}
-
-static int irq_affinity_write_proc (struct file *file, const char *buffer,
-					unsigned long count, void *data)
-{
-	int irq = (int) data, full_count = count, err;
-	unsigned long new_value;
-
-	if (!irq_desc[irq].handler->set_affinity)
-		return -EIO;
-
-	err = parse_hex_value(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@fsmlabs.com>
-	 */
-	if (!(new_value & cpu_online_map))
-		return -EINVAL;
-
-	irq_affinity[irq] = new_value;
-	irq_desc[irq].handler->set_affinity(irq, new_value);
-
-	return full_count;
-}
-
-static int prof_cpu_mask_read_proc (char *page, char **start, off_t off,
-			int count, int *eof, void *data)
-{
-	unsigned long *mask = (unsigned long *) data;
-	if (count < HEX_DIGITS+1)
-		return -EINVAL;
-	return sprintf (page, "%08lx\n", *mask);
-}
-
-static int prof_cpu_mask_write_proc (struct file *file, const char *buffer,
-					unsigned long count, void *data)
-{
-	unsigned long *mask = (unsigned long *) data, full_count = count, err;
-	unsigned long new_value;
-
-	err = parse_hex_value(buffer, count, &new_value);
-	if (err)
-		return err;
-
-	*mask = 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))
-		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;
-}
-
-unsigned long prof_cpu_mask = -1;
-
-void init_irq_proc (void)
-{
-	struct proc_dir_entry *entry;
-	int i;
-
-	/* create /proc/irq */
-	root_irq_dir = proc_mkdir("irq", 0);
-
-	/* create /proc/irq/prof_cpu_mask */
-	entry = create_proc_entry("prof_cpu_mask", 0600, root_irq_dir);
-
-	entry->nlink = 1;
-	entry->data = (void *)&prof_cpu_mask;
-	entry->read_proc = prof_cpu_mask_read_proc;
-	entry->write_proc = prof_cpu_mask_write_proc;
-
-	/*
-	 * Create entries for all existing IRQs.
-	 */
-	for (i = 0; i < NR_IRQS; i++) {
-		if (irq_desc[i].handler == NULL)
-			continue;
-		register_irq_proc(i);
-	}
-}
-
-void no_action(int irq, void *dev, struct pt_regs *regs)
-{
 }
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.64.vanilla/arch/ppc/mm/4xx_mmu.c linux-2.5.64/arch/ppc/mm/4xx_mmu.c
--- linux-2.5.64.vanilla/arch/ppc/mm/4xx_mmu.c	Wed Jan 15 20:30:52 2003
+++ linux-2.5.64/arch/ppc/mm/4xx_mmu.c	Tue Mar 11 11:28:00 2003
@@ -96,7 +96,7 @@
 unsigned long __init mmu_mapin_ram(void)
 {
 	unsigned long v, s;
-	phys_addr_t p;
+	/*phys_addr_t*/unsigned long p;
 
 	v = KERNELBASE;
 	p = PPC_MEMSTART;
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.64.vanilla/include/asm-ppc/hw_irq.h linux-2.5.64/include/asm-ppc/hw_irq.h
--- linux-2.5.64.vanilla/include/asm-ppc/hw_irq.h	Thu Nov 28 01:36:15 2002
+++ linux-2.5.64/include/asm-ppc/hw_irq.h	Tue Mar 11 10:38:47 2003
@@ -71,6 +71,32 @@
 struct hw_interrupt_type;
 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
 
+#define arch_ack_bad_irq(irq) do { } while (0)
+
+/* Return a pointer to the irq descriptor for IRQ.  */
+#define irq_desc(irq) (irq_desc + (irq))
+
+/* Check irq number */
+#define irq_valid(irq) ((irq) < NR_IRQS)
+
+/* Arch specific hook for setup_irq() */
+#define arch_setup_irq(irq, desc, irqaction) do { } while (0)
+
+/* Used in setup_irq() */
+#define ARCH_NONSHARED_IRQ_MASK ~(IRQ_DISABLED | IRQ_AUTODETECT | IRQ_WAITING)
+
+#define HAVE_ARCH_IRQ_PROBE
+
+#define ARCH_AFFINITY_WIDTH	8
+
+#ifdef CONFIG_IRQ_ALL_CPUS
+#define ARCH_DEFAULT_CPU_AFFINITY 
+#define ARCH_DEFAULT_IRQ_AFFINITY	~0UL
+#else
+#define ARCH_DEFAULT_IRQ_AFFINITY	0x00000001
+#endif
+
+#define arch_can_create_irq_proc() (1)
 
 #endif /* _PPC_HW_IRQ_H */
 #endif /* __KERNEL__ */

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [PATCH] irq handling code consolidation (common part)
@ 2003-01-21 10:45 Andrey Panin
  2003-01-21 10:59 ` [PATCH] irq handling code consolidation (ppc part) Andrey Panin
  0 siblings, 1 reply; 2+ messages in thread
From: Andrey Panin @ 2003-01-21 10:45 UTC (permalink / raw)
  To: linux-kernel; +Cc: pazke

[-- Attachment #1: Type: text/plain, Size: 468 bytes --]

Hi all,

this is a 3rd try on irq handling consolidation work.
Patch creates common kernel/irq.c which is used by following
arch specific patches.

Please take a look at it. Comments are welcome (especially from 
arch maintainers)

BTW is here a possibility that this code will be accepted or
feature freeze denies it and i'm wasting everyone's time ?

Best regards.

-- 
Andrey Panin		| Embedded systems software developer
pazke@orbita1.ru	| PGP key: wwwkeys.pgp.net

[-- Attachment #2: patch-irq-common-2.5.59 --]
[-- Type: text/plain, Size: 21527 bytes --]

diff --minimal -urN -X /usr/share/dontdiff linux-2.5.59.vanilla/kernel/Makefile linux-2.5.59/kernel/Makefile
--- linux-2.5.59.vanilla/kernel/Makefile	Mon Jan 20 13:42:57 2003
+++ linux-2.5.59/kernel/Makefile	Mon Jan 20 13:57:36 2003
@@ -22,6 +22,7 @@
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
 obj-$(CONFIG_SOFTWARE_SUSPEND) += suspend.o
 obj-$(CONFIG_COMPAT) += compat.o
+obj-$(CONFIG_GENERIC_IRQ) += irq.o
 
 ifneq ($(CONFIG_IA64),y)
 # According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.59.vanilla/kernel/irq.c linux-2.5.59/kernel/irq.c
--- linux-2.5.59.vanilla/kernel/irq.c	Thu Jan  1 03:00:00 1970
+++ linux-2.5.59/kernel/irq.c	Tue Jan 21 19:42:03 2003
@@ -0,0 +1,810 @@
+/*
+ *  linux/kernel/irq.c
+ *
+ *  Architecture independent parts of IRQ handling.
+ *
+ *  Copyright (C) 1992-2002 Linus Torvalds.
+ *
+ *  Modified from the alpha version by Andrey Panin.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+/*
+ * This file contains the code used by various IRQ handling routines:
+ * asking for different IRQ's should be done through these routines
+ * instead of just grabbing them. Thus setups with different IRQ numbers
+ * shouldn't result in any weird surprises, and installing new handlers
+ * should be easier.
+ *
+ * IRQs are in fact implemented a bit like signal handlers for the kernel.
+ * Naturally it's not a 1:1 relation, but there are similarities.
+ *
+ * Linux has a controller-independent x86 interrupt architecture.
+ * every controller has a 'controller-template', that is used
+ * by the main code to do the right thing. Each driver-visible
+ * interrupt source is transparently wired to the apropriate
+ * controller. Thus drivers need not be aware of the
+ * interrupt-controller.
+ *
+ * The code is designed to be easily extended with new/different
+ * interrupt controllers, without having to do assembly magic.
+ */
+
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/random.h>
+#include <linux/jiffies.h>
+#include <linux/proc_fs.h>
+#include <linux/stringify.h>
+
+#include <asm/param.h>
+#include <asm/semaphore.h>
+#include <asm/hw_irq.h>
+#include <asm/uaccess.h>
+
+#ifndef HAVE_ARCH_IRQ_DESC
+
+/*
+ * Controller mappings for all interrupt sources:
+ */
+irq_desc_t irq_desc[NR_IRQS] __cacheline_aligned = {
+	[0 ... NR_IRQS - 1] = {
+		.handler =	&no_irq_type,
+		.lock =		SPIN_LOCK_UNLOCKED,
+	}
+};
+
+#endif
+
+/*
+ * Special irq handlers.
+ */
+
+void no_action(int cpl, void *dev_id, struct pt_regs *regs) { }
+
+/*
+ * Generic no controller code
+ */
+atomic_t irq_err_count;
+
+static void no_irq_enable_disable(unsigned int irq) { }
+static unsigned int no_irq_startup(unsigned int irq) { return 0; }
+
+static void no_irq_ack(unsigned int irq)
+{
+	atomic_inc(&irq_err_count);
+	printk(KERN_CRIT "Unexpected IRQ trap at vector %u\n", irq);
+	arch_ack_bad_irq(irq);
+}
+
+struct hw_interrupt_type no_irq_type = {
+	.typename	= "none",
+	.startup	= no_irq_startup,
+	.shutdown	= no_irq_enable_disable,
+	.enable		= no_irq_enable_disable,
+	.disable	= no_irq_enable_disable,
+	.ack		= no_irq_ack,
+	.end		= no_irq_enable_disable,
+};
+
+/*
+ * This should really return information about whether
+ * we should do bottom half handling etc. Right now we
+ * end up _always_ checking the bottom half, which is a
+ * waste of time and is not what some drivers would
+ * prefer.
+ */
+int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
+		     struct irqaction *action)
+{
+	int status = 1;	/* Force the "do bottom halves" bit */
+
+	if (!(action->flags & SA_INTERRUPT))
+		local_irq_enable();
+
+	do {
+		status |= action->flags;
+		action->handler(irq, action->dev_id, regs);
+		action = action->next;
+	} while (action);
+	if (status & SA_SAMPLE_RANDOM)
+		add_interrupt_randomness(irq);
+	local_irq_disable();
+
+	return status;
+}
+
+#if defined(CONFIG_SMP) && !defined(HAVE_ARCH_SYNCRONIZE_IRQ)
+
+inline void synchronize_irq(unsigned int irq)
+{
+	irq_desc_t *desc = irq_desc(irq);
+
+        /* is there anything to synchronize with? */
+	if (!desc->action)
+		return;
+
+	while (desc->status & IRQ_INPROGRESS)
+		cpu_relax();
+}
+
+#endif
+
+/*
+ * Workarounds for interrupt types without startup()/shutdown() (ppc, ppc64).
+ * Will be removed some day.
+ */
+
+static int startup_irq(unsigned int irq)
+{
+	irq_desc_t *desc = irq_desc(irq);
+
+	if (desc->handler->startup)
+		return desc->handler->startup(irq);
+	else if (desc->handler->enable)
+		desc->handler->enable(irq);
+	else 
+		BUG();
+	return 0;
+}
+
+static void shutdown_irq(unsigned int irq)
+{
+	irq_desc_t *desc = irq_desc(irq);
+
+	if (desc->handler->shutdown)
+		desc->handler->shutdown(irq);
+	else if (desc->handler->disable)
+		desc->handler->disable(irq);
+	else 
+		BUG();
+}
+
+/*
+ * 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 and Enables are
+ *	nested.
+ *	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.
+ */
+inline 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++) {
+		/* Needed for ppc & ppc64, doesn't harm others (really ?) */
+		if (!(desc->status & IRQ_PER_CPU))
+			desc->status |= IRQ_DISABLED;
+		desc->handler->disable(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.  Enables and Disables are
+ *	nested. 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)
+{
+	disable_irq_nosync(irq);
+	synchronize_irq(irq);
+}
+
+/**
+ *	enable_irq - enable handling of an irq
+ *	@irq: Interrupt to enable
+ *
+ *	Undoes the effect of one call to disable_irq().  If this
+ *	matches the last disable, processing of interrupts on this
+ *	IRQ line is re-enabled.
+ *
+ *	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);
+		}
+		desc->handler->enable(irq);
+		/* fall-through */
+	}
+	default:
+		desc->depth--;
+		break;
+	case 0:
+		printk(KERN_ERR "enable_irq(%u) unbalanced from %p\n",
+		       irq, __builtin_return_address(0));
+	}
+	spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+/**
+ *	request_irq - allocate an interrupt line
+ *	@irq: Interrupt line to allocate
+ *	@handler: Function to be called when the IRQ occurs
+ *	@irqflags: Interrupt type flags
+ *	@devname: An ascii name for the claiming device
+ *	@dev_id: A cookie passed back to the handler function
+ *
+ *	This call allocates interrupt resources and enables the
+ *	interrupt line and IRQ handling. From the point this
+ *	call is made your handler function may be invoked. Since
+ *	your handler function must clear any interrupt the board 
+ *	raises, you must take care both to initialise your hardware
+ *	and to set up the interrupt handler in the right order.
+ *
+ *	Dev_id must be globally unique. Normally the address of the
+ *	device data structure is used as the cookie. Since the handler
+ *	receives this value it makes sense to use it.
+ *
+ *	If your interrupt is shared you must pass a non NULL dev_id
+ *	as this is required when freeing the interrupt.
+ *
+ *	Flags:
+ *
+ *	SA_SHIRQ		Interrupt is shared
+ *
+ *	SA_INTERRUPT		Disable local interrupts while processing
+ *
+ *	SA_SAMPLE_RANDOM	The interrupt can be used for entropy
+ */
+int request_irq(unsigned int irq, 
+		void (*handler)(int, void *, struct pt_regs *),
+		unsigned long irqflags, 
+		const char *devname,
+		void *dev_id)
+{
+	int retval;
+	struct irqaction *action;
+
+	/*
+	 * Sanity-check: shared interrupts should REALLY pass in
+	 * a real dev-ID, otherwise we'll have trouble later trying
+	 * to figure out which interrupt is which (messes up the
+	 * interrupt freeing logic etc).
+	 */
+	if (irqflags & SA_SHIRQ) {
+		if (!dev_id)
+			printk(KERN_ERR "Bad boy: %s (at %p) called us " \
+				"without a dev_id!\n", devname,
+				__builtin_return_address(0));
+	}
+
+	if (!irq_valid(irq) || !handler)
+		return -EINVAL;
+
+	action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
+	if (!action)
+		return -ENOMEM;
+
+	action->handler = handler;
+	action->flags = irqflags;
+	action->mask = 0;
+	action->name = devname;
+	action->next = NULL;
+	action->dev_id = dev_id;
+
+	retval = setup_irq(irq, action);
+	if (retval)
+		kfree(action);
+	return retval;
+}
+
+#ifndef HAVE_ARCH_IRQ_PROC
+void register_irq_proc(unsigned int irq);
+#endif
+
+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);
+	}
+
+	arch_setup_irq(irq, desc, new);
+
+	/*
+	 * 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 &= ARCH_NONSHARED_IRQ_MASK;
+		startup_irq(irq);
+	}
+	spin_unlock_irqrestore(&desc->lock, flags);
+
+	register_irq_proc(irq);
+
+	return 0;
+}
+
+/**
+ *	free_irq - free an interrupt
+ *	@irq: Interrupt line to free
+ *	@dev_id: Device identity to free
+ *
+ *	Remove an interrupt handler. The handler is removed and if the
+ *	interrupt line is no longer in use by any driver it is disabled.
+ *	On a shared IRQ the caller must ensure the interrupt is disabled
+ *	on the card it drives before calling this function. The function
+ *	does not return until any executing interrupts for this IRQ
+ *	have completed.
+ *
+ *	This function must not be called from interrupt context. 
+ */
+void free_irq(unsigned int irq, void *dev_id)
+{
+	irq_desc_t *desc;
+	struct irqaction **p;
+	unsigned long flags;
+
+	if (!irq_valid(irq)) {
+		printk(KERN_CRIT "Trying to free IRQ%d\n", irq);
+		return;
+	}
+
+	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;
+				shutdown_irq(irq);
+			}
+			spin_unlock_irqrestore(&desc->lock, flags);
+
+			/* Wait to make sure it's not being used on another CPU */
+			synchronize_irq(irq);
+			kfree(action);
+			return;
+		}
+		printk(KERN_CRIT "Trying to free free IRQ%d\n", irq);
+		spin_unlock_irqrestore(&desc->lock, flags);
+		return;
+	}
+}
+
+#ifndef HAVE_ARCH_IRQ_PROBE
+
+/*
+ * IRQ autodetection code..
+ *
+ * This depends on the fact that any interrupt that
+ * comes in on to an unassigned handler will get stuck
+ * with "IRQ_WAITING" cleared and the interrupt
+ * disabled.
+ */
+
+static DECLARE_MUTEX(probe_sem);
+
+/**
+ *	probe_irq_on - begin an interrupt autodetect
+ *
+ *	Commence probing for an interrupt. The interrupts are scanned
+ *	and a mask of potential interrupt lines is returned.
+ *
+ */
+unsigned long probe_irq_on(void)
+{
+	unsigned int i;
+	irq_desc_t *desc;
+	unsigned long val;
+	unsigned long delay;
+
+	down(&probe_sem);
+	/* 
+	 * something may have generated an irq long ago and we want to
+	 * flush such a longstanding irq before considering it as spurious. 
+	 */
+	for (i = NR_IRQS - 1; i > 0; i--)  {
+		desc = irq_desc(i);
+
+		spin_lock_irq(&desc->lock);
+		if (!desc->action) 
+			startup_irq(i);
+		spin_unlock_irq(&desc->lock);
+	}
+
+	/* Wait for longstanding interrupts to trigger. */
+	for (delay = jiffies + HZ/50; time_after(delay, jiffies); )
+		/* about 20ms delay */ barrier();
+
+	/*
+	 * enable any unassigned irqs
+	 * (we must startup again here because if a longstanding irq
+	 * happened in the previous stage, it may have masked itself)
+	 */
+	for (i = NR_IRQS-1; i > 0; i--) {
+		desc = irq_desc(i);
+
+		spin_lock_irq(&desc->lock);
+		if (!desc->action) {
+			desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
+			if (startup_irq(i))
+				desc->status |= IRQ_PENDING;
+		}
+		spin_unlock_irq(&desc->lock);
+	}
+
+	/*
+	 * Wait for spurious interrupts to trigger
+	 */
+	for (delay = jiffies + HZ/10; time_after(delay, jiffies); )
+		/* about 100ms delay */ barrier();
+
+	/*
+	 * Now filter out any obviously spurious interrupts
+	 */
+	val = 0;
+	for (i = 0; i < NR_IRQS; i++) {
+		irq_desc_t *desc = irq_desc(i);
+		unsigned int status;
+
+		spin_lock_irq(&desc->lock);
+		status = desc->status;
+
+		if (status & IRQ_AUTODETECT) {
+			/* It triggered already - consider it spurious. */
+			if (!(status & IRQ_WAITING)) {
+				desc->status = status & ~IRQ_AUTODETECT;
+				shutdown_irq(i);
+			} else
+				if (i < 32)
+					val |= 1 << i;
+		}
+		spin_unlock_irq(&desc->lock);
+	}
+
+	return val;
+}
+
+/**
+ *	probe_irq_mask - scan a bitmap of interrupt lines
+ *	@val:	mask of interrupts to consider
+ *
+ *	Scan the ISA bus interrupt lines and return a bitmap of
+ *	active interrupts. The interrupt probe logic state is then
+ *	returned to its previous value. This function can handle only 
+ *	legacy ISA interrupts
+ *
+ *	Note: we need to scan all the irq's even though we will
+ *	only return ISA irq numbers - just so that we reset them
+ *	all to a known state.
+ */
+unsigned int probe_irq_mask(unsigned long val)
+{
+	int i;
+	unsigned int mask;
+
+	mask = 0;
+	for (i = 0; i < NR_IRQS; i++) {
+		irq_desc_t *desc = irq_desc(i);
+		unsigned int status;
+
+		spin_lock_irq(&desc->lock);
+		status = desc->status;
+
+		if (status & IRQ_AUTODETECT) {
+			if (i < 16 && !(status & IRQ_WAITING))
+				mask |= 1 << i;
+
+			desc->status = status & ~IRQ_AUTODETECT;
+			shutdown_irq(i);
+		}
+		spin_unlock_irq(&desc->lock);
+	}
+	up(&probe_sem);
+
+	return mask & val;
+}
+
+/**
+ *	probe_irq_off	- end an interrupt autodetect
+ *	@val: mask of potential interrupts (unused)
+ *
+ *	Scans the unused interrupt lines and returns the line which
+ *	appears to have triggered the interrupt. If no interrupt was
+ *	found then zero is returned. If more than one interrupt is
+ *	found then minus the first candidate is returned to indicate
+ *	their is doubt. This function can handle any interrupt source.
+ *
+ *	The interrupt probe logic state is returned to its previous
+ *	value.
+ *
+ *	BUGS: When used in a module (which arguably shouldnt happen)
+ *	nothing prevents two IRQ probe callers from overlapping. The
+ *	results of this are non-optimal.
+ */
+int probe_irq_off(unsigned long val)
+{
+	int i, irq_found, nr_irqs;
+
+	nr_irqs = 0;
+	irq_found = 0;
+	for (i = 0; i < NR_IRQS; i++) {
+		irq_desc_t *desc = irq_desc(i);
+		unsigned int status;
+
+		spin_lock_irq(&desc->lock);
+		status = desc->status;
+
+		if (status & IRQ_AUTODETECT) {
+			if (!(status & IRQ_WAITING)) {
+				if (!nr_irqs)
+					irq_found = i;
+				nr_irqs++;
+			}
+			desc->status = status & ~IRQ_AUTODETECT;
+			shutdown_irq(i);
+		}
+		spin_unlock_irq(&desc->lock);
+	}
+	up(&probe_sem);
+
+	if (nr_irqs > 1)
+		irq_found = -irq_found;
+	return irq_found;
+}
+
+#endif	/* HAVE_ARCH_IRQ_PROBE */
+
+#ifndef HAVE_ARCH_IRQ_PROC
+
+unsigned int parse_hex_value(const char *buffer, unsigned long count, 
+			     unsigned long *ret)
+{
+	unsigned char hexnum[ARCH_AFFINITY_WIDTH];
+	unsigned long value, i;
+
+	if (!count)
+		return -EINVAL;
+	if (count > ARCH_AFFINITY_WIDTH)
+		count = ARCH_AFFINITY_WIDTH;
+	if (copy_from_user(hexnum, buffer, count))
+		return -EFAULT;
+
+	/*
+	 * Parse the first ARCH_AFFINITY_WIDTH characters as a hex
+	 * string, any non-hex char is end-of-string. '00e1', 'e1', '00E1',
+	 * 'E1' are all the same.
+	 */
+	value = 0;
+
+	for (i = 0; i < count; i++) {
+		unsigned int c = hexnum[i];
+
+		switch (c) {
+			case '0' ... '9': c -= '0'; break;
+			case 'a' ... 'f': c -= 'a' - 10; break;
+			case 'A' ... 'F': c -= 'A' - 10; break;
+		default:
+			goto out;
+		}
+		value = (value << 4) | c;
+	}
+out:
+	*ret = value;
+	return 0;
+}
+
+#define MAX_NAMELEN 10
+
+struct proc_dir_entry *root_irq_dir;
+static struct proc_dir_entry *irq_dir[NR_IRQS];
+
+#ifdef CONFIG_SMP
+static struct proc_dir_entry *smp_affinity_entry[NR_IRQS];
+
+unsigned long irq_affinity[NR_IRQS] = { 
+	[0 ... NR_IRQS - 1] = ARCH_DEFAULT_IRQ_AFFINITY
+};
+#endif
+
+static int irq_affinity_read_proc(char *page, char **start, off_t off,
+				  int count, int *eof, void *data)
+{
+	if (count < ARCH_AFFINITY_WIDTH + 1)
+		return -EINVAL;
+	return sprintf (page, "%0" __stringify(ARCH_AFFINITY_WIDTH) "lx\n",
+			irq_affinity[(long)data]);
+}
+
+static int irq_affinity_write_proc(struct file *file, const char *buffer,
+				   unsigned long count, void *data)
+{
+	int irq = (long) data, full_count = count, err;
+	unsigned long new_value;
+
+	if (!irq_desc(irq)->handler->set_affinity)
+		return -EIO;
+
+	err = parse_hex_value(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.
+	 */
+	if (!(new_value & cpu_online_map))
+		return -EINVAL;
+
+	irq_affinity[irq] = new_value;
+	irq_desc(irq)->handler->set_affinity(irq, new_value);
+
+	return full_count;
+}
+
+void register_irq_proc(unsigned int irq)
+{
+	char name[MAX_NAMELEN];
+
+	if (!root_irq_dir || (irq_desc(irq)->handler == &no_irq_type) ||
+			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);
+
+#if CONFIG_SMP
+	if (irq_desc(irq)->handler->set_affinity) {
+		struct proc_dir_entry *entry;
+
+		/* create /proc/irq/1234/smp_affinity */
+		entry = create_proc_entry("smp_affinity", 0600, irq_dir[irq]);
+
+		if (entry) {
+			entry->nlink = 1;
+			entry->data = (void *)(long)irq;
+			entry->read_proc = irq_affinity_read_proc;
+			entry->write_proc = irq_affinity_write_proc;
+		}
+
+		smp_affinity_entry[irq] = entry;
+	}
+#endif
+}
+
+unsigned long prof_cpu_mask = ~0UL;
+
+static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
+				   int count, int *eof, void *data)
+{
+	unsigned long *mask = (unsigned long *) data;
+	if (count < ARCH_AFFINITY_WIDTH + 1)
+		return -EINVAL;
+	return sprintf (page, "%0" __stringify(ARCH_AFFINITY_WIDTH) "lx\n", 
+			*mask);
+}
+
+static int prof_cpu_mask_write_proc(struct file *file, const char *buffer,
+				    unsigned long count, void *data)
+{
+	unsigned long *mask = (unsigned long *) data, full_count = count, err;
+	unsigned long new_value;
+
+	err = parse_hex_value(buffer, count, &new_value);
+	if (err)
+		return err;
+
+	*mask = new_value;
+	return full_count;
+}
+
+void init_irq_proc(void)
+{
+	int i;
+
+	/* create /proc/irq */
+	root_irq_dir = proc_mkdir("irq", 0);
+
+#ifdef CONFIG_SMP
+	{
+		struct proc_dir_entry *entry;
+
+		/* create /proc/irq/prof_cpu_mask */
+		entry = create_proc_entry("prof_cpu_mask", 0600, root_irq_dir);
+		if (!entry)
+			return;
+
+		entry->nlink = 1;
+		entry->data = (void *)&prof_cpu_mask;
+		entry->read_proc = prof_cpu_mask_read_proc;
+		entry->write_proc = prof_cpu_mask_write_proc;
+	}
+#endif
+
+	/*
+	 * Create entries for all existing IRQs.
+	 */
+	if (arch_can_create_irq_proc())
+		for (i = 0; irq_valid(i); i++)
+			if (irq_desc(i)->handler != &no_irq_type)
+				register_irq_proc(i);
+}
+
+#endif	/* HAVE_ARCH_IRQ_PROC */

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2003-03-13 13:25 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2003-03-13 13:36 [PATCH] irq handling code consolidation (ppc part) Andrey Panin
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2003-01-21 10:45 [PATCH] irq handling code consolidation (common part) Andrey Panin
2003-01-21 10:59 ` [PATCH] irq handling code consolidation (ppc part) Andrey Panin

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