patch-2.4.19 linux-2.4.19/arch/mips64/mips-boards/atlas/atlas_int.c

• Lines: 250
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips64/mips-boards/atlas/atlas_int.c
• Orig date: Sun Sep 9 10:43:02 2001

diff -urN linux-2.4.18/arch/mips64/mips-boards/atlas/atlas_int.c linux-2.4.19/arch/mips64/mips-boards/atlas/atlas_int.c
@@ -1,249 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
- *
- * ########################################################################
- *
- *  This program is free software; you can distribute it and/or modify it
- *  under the terms of the GNU General Public License (Version 2) as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * Routines for generic manipulation of the interrupts found on the MIPS 
- * Atlas board.
- *
- */
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-
-#include <asm/irq.h>
-#include <asm/mips-boards/atlas.h>
-#include <asm/mips-boards/atlasint.h>
-#ifdef CONFIG_REMOTE_DEBUG
-#include <asm/gdb-stub.h>
-#endif
-
-struct atlas_ictrl_regs *atlas_hw0_icregs
-	= (struct atlas_ictrl_regs *)ATLAS_ICTRL_REGS_BASE;
-
-extern asmlinkage void mipsIRQ(void);
-extern void do_IRQ(int irq, struct pt_regs *regs);
-
-unsigned long spurious_count = 0;
-irq_desc_t irq_desc[NR_IRQS];
-
-#if 0
-#define DEBUG_INT(x...) printk(x)
-#else
-#define DEBUG_INT(x...)
-#endif
-
-void disable_atlas_irq(unsigned int irq_nr)
-{
-	atlas_hw0_icregs->intrsten = (1 << irq_nr);
-}
-
-void enable_atlas_irq(unsigned int irq_nr)
-{
-	atlas_hw0_icregs->intseten = (1 << irq_nr);
-}
-
-static unsigned int startup_atlas_irq(unsigned int irq)
-{
-	enable_atlas_irq(irq);
-	return 0; /* never anything pending */
-}
-
-#define shutdown_atlas_irq	disable_atlas_irq
-
-#define mask_and_ack_atlas_irq disable_atlas_irq
-
-static void end_atlas_irq(unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_atlas_irq(irq);
-}
-
-static struct hw_interrupt_type atlas_irq_type = {
-	"Atlas",
-	startup_atlas_irq,
-	shutdown_atlas_irq,
-	enable_atlas_irq,
-	disable_atlas_irq,
-	mask_and_ack_atlas_irq,
-	end_atlas_irq,
-	NULL
-};
-
-int get_irq_list(char *buf)
-{
-	int i, len = 0;
-	int num = 0;
-	struct irqaction *action;
-
-	for (i = 0; i < ATLASINT_END; i++, num++) {
-		action = irq_desc[i].action;
-		if (!action) 
-			continue;
-		len += sprintf(buf+len, "%2d: %8d %c %s",
-			num, kstat.irqs[0][num],
-			(action->flags & SA_INTERRUPT) ? '+' : ' ',
-			action->name);
-		for (action=action->next; action; action = action->next) {
-			len += sprintf(buf+len, ",%s %s",
-				(action->flags & SA_INTERRUPT) ? " +" : "",
-				action->name);
-		}
-		len += sprintf(buf+len, " [hw0]\n");
-	}
-	return len;
-}
-
-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;
-
-	DEBUG_INT("request_irq: irq=%d, devname = %s\n", irq, devname);
-
-        if (irq >= ATLASINT_END)
-	        return -EINVAL;
-	if (!handler)
-	        return -EINVAL;
-
-	action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
-	if(!action)
-	        return -ENOMEM;
-
-	action->handler = handler;
-	action->flags = irqflags;
-	action->mask = 0;
-	action->name = devname;
-	action->dev_id = dev_id;
-	action->next = 0;
-	irq_desc[irq].action = action;
-	enable_atlas_irq(irq);
-
-	return 0;
-}
-
-void free_irq(unsigned int irq, void *dev_id)
-{
-	struct irqaction *action;
-
-	if (irq >= ATLASINT_END) {
-		printk("Trying to free IRQ%d\n",irq);
-		return;
-	}
-
-	action = irq_desc[irq].action;
-	irq_desc[irq].action = NULL;
-	disable_atlas_irq(irq);
-	kfree(action);
-}
-
-static inline int ls1bit32(unsigned int x)
-{
-	int b = 31, s;
-
-	s = 16; if (x << 16 == 0) s = 0; b -= s; x <<= s;
-	s =  8; if (x <<  8 == 0) s = 0; b -= s; x <<= s;
-	s =  4; if (x <<  4 == 0) s = 0; b -= s; x <<= s;
-	s =  2; if (x <<  2 == 0) s = 0; b -= s; x <<= s;
-	s =  1; if (x <<  1 == 0) s = 0; b -= s;
-
-	return b;
-}
-
-void atlas_hw0_irqdispatch(struct pt_regs *regs)
-{
-	struct irqaction *action;
-	unsigned long int_status;
-	int irq, cpu = smp_processor_id();
-
-	int_status = atlas_hw0_icregs->intstatus; 
-
-	/* if int_status == 0, then the interrupt has already been cleared */
-	if (int_status == 0)
-		return;
-
-	irq = ls1bit32(int_status);
-	action = irq_desc[irq].action;
-
-	DEBUG_INT("atlas_hw0_irqdispatch: irq=%d\n", irq);
-
-	/* if action == NULL, then we don't have a handler for the irq */
-	if ( action == NULL ) {
-	        printk("No handler for hw0 irq: %i\n", irq);
-		spurious_count++;
-		return;
-	}
-
-	irq_enter(cpu, irq);
-	kstat.irqs[0][irq]++;
-	action->handler(irq, action->dev_id, regs);
-	irq_exit(cpu, irq);
-
-	return;		
-}
-
-unsigned long probe_irq_on (void)
-{
-	return 0;
-}
-
-
-int probe_irq_off (unsigned long irqs)
-{
-	return 0;
-}
-
-#ifdef CONFIG_REMOTE_DEBUG
-extern void breakpoint(void);
-extern int remote_debug;
-#endif
-
-void __init init_IRQ(void)
-{
-	int i;
-
-	/* 
-	 * Mask out all interrupt by writing "1" to all bit position in 
-	 * the interrupt reset reg. 
-	 */
-	atlas_hw0_icregs->intrsten = 0xffffffff;    
-
-	/* Now safe to set the exception vector. */
-	set_except_vector(0, mipsIRQ);
-
-	for (i = 0; i <= ATLASINT_END; i++) {
-		irq_desc[i].status	= IRQ_DISABLED;
-		irq_desc[i].action	= 0;
-		irq_desc[i].depth	= 1;
-		irq_desc[i].handler	= &atlas_irq_type;
-	}
-
-#ifdef CONFIG_REMOTE_DEBUG
-	if (remote_debug) {
-		set_debug_traps();
-		breakpoint();
-	}
-#endif
-}