patch-2.4.4 linux/arch/mips/orion/irq.c

• Lines: 282
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.3/linux/arch/mips/orion/irq.c
• Orig date: Fri Feb 9 11:29:44 2001

diff -u --recursive --new-file v2.4.3/linux/arch/mips/orion/irq.c linux/arch/mips/orion/irq.c
@@ -1,281 +0,0 @@
-/*
- * Code to handle irqs on Orion boards
- *  -- Cort <cort@fsmlabs.com>
- */
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-
-#include <asm/bitops.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mipsregs.h>
-#include <asm/system.h>
-#include <asm/orion.h>
-
-void (*board_time_init)(struct irqaction *irq);
-extern asmlinkage void orionIRQ(void);
-unsigned long spurious_count = 0;
-irq_desc_t irq_desc[NR_IRQS];
-
-static void galileo_ack(unsigned int irq_nr)
-{
-	*((unsigned long *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0xC18) ) = (((( 0 )&0xff)<<24)+	((( 0 )&0xff00)<<8)+	((( 0 )&0xff0000)>>8)+	((( 0 )&0xff000000)>>24))  ;
-}
-
-struct hw_interrupt_type galileo_pic = {
-        " Galileo  ",
-        NULL,
-        NULL,
-        NULL, /* unmask_irq */
-        NULL, /* mask_irq */
-        galileo_ack, /* mask_and_ack */
-        0
-};
-
-/* Function for careful CP0 interrupt mask access */
-static inline void modify_cp0_intmask(unsigned clr_mask, unsigned set_mask)
-{
-	unsigned long status = read_32bit_cp0_register(CP0_STATUS);
-	status &= ~((clr_mask & 0xFF) << 8);
-	status |=   (set_mask & 0xFF) << 8;
-	write_32bit_cp0_register(CP0_STATUS, status);
-}
-
-static inline void mask_irq(unsigned int irq_nr)
-{
-        modify_cp0_intmask(irq_nr, 0);
-}
-
-static inline void unmask_irq(unsigned int irq_nr)
-{
-	modify_cp0_intmask(0, irq_nr);
-}
-
-void disable_irq(unsigned int irq_nr)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	mask_irq(irq_nr);
-	restore_flags(flags);
-}
-
-void enable_irq(unsigned int irq_nr)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	unmask_irq(irq_nr);
-	restore_flags(flags);
-}
-
-/*static struct irqaction *irq_action[NR_IRQS] = {
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
-};
-*/
-void __init orion_time_init(struct irqaction *irq)
-{
-	__u32 timer_count;
-	
-	irq_desc[2].handler = &galileo_pic;
-	irq_desc[2].action = irq;
-	
-	/* This code was provided by the CoSine guys and despite its
-	 * appearance init's the timer.
-	 * -- Cort
-	 */
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0x864) ) = (((( 0 )&0xff)<<24)+	((( 0 )&0xff00)<<8)+	((( 0 )&0xff0000)>>8)+	((( 0 )&0xff000000)>>24)) ;
-	
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0x850) ) = (((( 0 )&0xff)<<24)+	((( 0 )&0xff00)<<8)+	((( 0 )&0xff0000)>>8)+	((( 0 )&0xff000000)>>24)) ;
-
-        timer_count = 300000000/100;
-	
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0x850) ) = ((((  timer_count  )&0xff)<<24)+	(((  timer_count  )&0xff00)<<8)+	(((  timer_count  )&0xff0000)>>8)+	(((  timer_count  )&0xff000000)>>24))  ;
-
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0xC1C) ) = ((((  0x100   )&0xff)<<24)+	(((  0x100   )&0xff00)<<8)+	(((  0x100   )&0xff0000)>>8)+	(((  0x100   )&0xff000000)>>24))  ;
-     
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0x864) ) = ((((  0x03  )&0xff)<<24)+	(((  0x03  )&0xff00)<<8)+	(((  0x03  )&0xff0000)>>8)+	(((  0x03  )&0xff000000)>>24))  ;
-     
-	*((__u32 *) (((unsigned)( 0x14000000  )|0xA0000000)   + 0xC18) ) = (((( 0 )&0xff)<<24)+	((( 0 )&0xff00)<<8)+	((( 0 )&0xff0000)>>8)+	((( 0 )&0xff000000)>>24))  ;
-}
-
-int get_irq_list(char *buf)
-{
-	int i, len = 0, j;
-	struct irqaction * action;
-
-	len += sprintf(buf+len, "           ");
-	for (j=0; j<smp_num_cpus; j++)
-		len += sprintf(buf+len, "CPU%d       ",j);
-	*(char *)(buf+len++) = '\n';
-
-	for (i = 0 ; i < NR_IRQS ; i++) {
-		action = irq_desc[i].action;
-		if ( !action || !action->handler )
-			continue;
-		len += sprintf(buf+len, "%3d: ", i);		
-		len += sprintf(buf+len, "%10u ", kstat_irqs(i));
-		if ( irq_desc[i].handler )		
-			len += sprintf(buf+len, " %s ", irq_desc[i].handler->typename );
-		else
-			len += sprintf(buf+len, "  None      ");
-		len += sprintf(buf+len, "    %s",action->name);
-		for (action=action->next; action; action = action->next) {
-			len += sprintf(buf+len, ", %s", action->name);
-		}
-		len += sprintf(buf+len, "\n");
-	}
-	len += sprintf(buf+len, "BAD: %10lu\n", spurious_count);
-	return len;
-}
-
-asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
-{
-	struct irqaction *action;
-	int do_random, cpu;
-	int status;
-
-	cpu = smp_processor_id();
-	irq_enter(cpu);
-	kstat.irqs[cpu][irq]++;
-	status = 0;
-
-	if (irq_desc[irq].handler->ack)
-		irq_desc[irq].handler->ack(irq);
-	
-	action = irq_desc[irq].action;
-	if (action && action->handler)
-	{
-		if (!(action->flags & SA_INTERRUPT))
-			__sti();
-		do { 
-			status |= action->flags;
-			action->handler(irq, action->dev_id, regs);
-			action = action->next;
-		} while ( action );
-		__cli();
-		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);
-		}
-	}
-
-	irq_exit(cpu);
-
-	if (softirq_active(cpu)&softirq_mask(cpu))
-		do_softirq();
-
-	/* unmasking and bottom half handling is done magically for us. */
-}
-
-int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
-	unsigned long irqflags, const char * devname, void *dev_id)
-{
-	struct irqaction *old, **p, *action;
-	unsigned long flags;
-
-	if (irq >= NR_IRQS)
-		return -EINVAL;
-	if (!handler)
-	{
-		/* Free */
-		for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next)
-		{
-			/* Found it - now free it */
-			save_flags(flags);
-			cli();
-			*p = action->next;
-			restore_flags(flags);
-			kfree(action);
-			return 0;
-		}
-		return -ENOENT;
-	}
-	
-	action = (struct irqaction *)
-		kmalloc(sizeof(struct irqaction), GFP_KERNEL);
-	if (!action)
-		return -ENOMEM;
-	
-	save_flags(flags);
-	cli();
-	
-	action->handler = handler;
-	action->flags = irqflags;					
-	action->mask = 0;
-	action->name = devname;
-	action->dev_id = dev_id;
-	action->next = NULL;
-	enable_irq(irq);
-	
-	p = &irq_desc[irq].action;
-	
-	if ((old = *p) != NULL) {
-		/* Can't share interrupts unless both agree to */
-		if (!(old->flags & action->flags & SA_SHIRQ))
-			return -EBUSY;
-		/* add new interrupt at end of irq queue */
-		do {
-			p = &old->next;
-			old = *p;
-		} while (old);
-	}
-	*p = action;
-
-	restore_flags(flags);	
-	return 0;
-}
-		
-void free_irq(unsigned int irq, void *dev_id)
-{
-	request_irq(irq, NULL, 0, NULL, dev_id);
-}
-
-
-unsigned long probe_irq_on (void)
-{
-	return 0;
-}
-
-int probe_irq_off (unsigned long irqs)
-{
-	return 0;
-}
-
-int (*irq_cannonicalize)(int irq);
-
-int orion_irq_cannonicalize(int i)
-{
-	return i;
-}
-
-void __init init_IRQ(void)
-{
-	
-	irq_cannonicalize = orion_irq_cannonicalize;
-	set_except_vector(0, orionIRQ);
-}
-
-EXPORT_SYMBOL(irq_cannonicalize);
-