patch-2.4.19 linux-2.4.19/arch/mips64/sgi-ip22/ip22-int.c

• Lines: 609
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips64/sgi-ip22/ip22-int.c
• Orig date: Sun Sep 9 10:43:02 2001

diff -urN linux-2.4.18/arch/mips64/sgi-ip22/ip22-int.c linux-2.4.19/arch/mips64/sgi-ip22/ip22-int.c
@@ -1,608 +0,0 @@
-/*
- * indy_int.c: Routines for generic manipulation of the INT[23] ASIC
- *             found on INDY workstations..
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
- * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) - Indigo2 changes
- */
-#include <linux/config.h>
-#include <linux/init.h>
-
-#include <linux/errno.h>
-#include <linux/kernel_stat.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 <linux/smp.h>
-#include <linux/smp_lock.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/ptrace.h>
-#include <asm/processor.h>
-#include <asm/sgi/sgi.h>
-#include <asm/sgi/sgihpc.h>
-#include <asm/sgi/sgint23.h>
-
-/*
- * 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.
- *
- * Various interrupt controllers we handle: 8259 PIC, SMP IO-APIC,
- * PIIX4's internal 8259 PIC and SGI's Visual Workstation Cobalt (IO-)APIC.
- * (IO-APICs assumed to be messaging to Pentium local-APICs)
- *
- * the code is designed to be easily extended with new/different
- * interrupt controllers, without having to do assembly magic.
- */
-
-struct sgi_int2_regs *sgi_i2regs;
-struct sgi_int3_regs *sgi_i3regs;
-struct sgi_ioc_ints *ioc_icontrol;
-struct sgi_ioc_timers *ioc_timers;
-volatile unsigned char *ioc_tclear;
-
-static char lc0msk_to_irqnr[256];
-static char lc1msk_to_irqnr[256];
-static char lc2msk_to_irqnr[256];
-static char lc3msk_to_irqnr[256];
-
-extern asmlinkage void indyIRQ(void);
-
-#ifdef CONFIG_REMOTE_DEBUG
-extern void rs_kgdb_hook(int);
-#endif
-
-unsigned long spurious_count = 0;
-
-/* Local IRQ's are layed out logically like this:
- *
- * 0  --> 7   ==   local 0 interrupts
- * 8  --> 15  ==   local 1 interrupts
- * 16 --> 23  ==   vectored level 2 interrupts
- * 24 --> 31  ==   vectored level 3 interrupts (not used)
- */
-void disable_local_irq(unsigned int irq_nr)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	switch(irq_nr) {
-	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
-		ioc_icontrol->imask0 &= ~(1 << irq_nr);
-		break;
-
-	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
-		ioc_icontrol->imask1 &= ~(1 << (irq_nr - 8));
-		break;
-
-	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
-		ioc_icontrol->cmeimask0 &= ~(1 << (irq_nr - 16));
-		break;
-
-	default:
-		/* This way we'll see if anyone would ever want vectored
-		 * level 3 interrupts.  Highly unlikely.
-		 */
-		printk("Yeeee, got passed irq_nr %d at disable_irq\n", irq_nr);
-		panic("INVALID IRQ level!");
-	};
-	restore_flags(flags);
-}
-
-void enable_local_irq(unsigned int irq_nr)
-{
-	unsigned long flags;
-	save_and_cli(flags);
-	switch(irq_nr) {
-	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
-		ioc_icontrol->imask0 |= (1 << irq_nr);
-		break;
-
-	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
-		ioc_icontrol->imask1 |= (1 << (irq_nr - 8));
-		break;
-
-	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
-		enable_local_irq(7);
-		ioc_icontrol->cmeimask0 |= (1 << (irq_nr - 16));
-		break;
-
-	default:
-		printk("Yeeee, got passed irq_nr %d at disable_irq\n", irq_nr);
-		panic("INVALID IRQ level!");
-	};
-	restore_flags(flags);
-}
-
-void disable_gio_irq(unsigned int irq_nr)
-{
-	/* XXX TODO XXX */
-}
-
-void enable_gio_irq(unsigned int irq_nr)
-{
-	/* XXX TODO XXX */
-}
-
-void disable_hpcdma_irq(unsigned int irq_nr)
-{
-	/* XXX TODO XXX */
-}
-
-void enable_hpcdma_irq(unsigned int irq_nr)
-{
-	/* XXX TODO XXX */
-}
-
-void disable_irq(unsigned int irq_nr)
-{
-	unsigned int n = irq_nr;
-	if(n >= SGINT_END) {
-		printk("whee, invalid irq_nr %d\n", irq_nr);
-		panic("IRQ, you lose...");
-	}
-	if(n >= SGINT_LOCAL0 && n < SGINT_GIO) {
-		disable_local_irq(n - SGINT_LOCAL0);
-	} else if(n >= SGINT_GIO && n < SGINT_HPCDMA) {
-		disable_gio_irq(n - SGINT_GIO);
-	} else if(n >= SGINT_HPCDMA && n < SGINT_END) {
-		disable_hpcdma_irq(n - SGINT_HPCDMA);
-	} else {
-		panic("how did I get here?");
-	}
-}
-
-void enable_irq(unsigned int irq_nr)
-{
-	unsigned int n = irq_nr;
-	if(n >= SGINT_END) {
-		printk("whee, invalid irq_nr %d\n", irq_nr);
-		panic("IRQ, you lose...");
-	}
-	if(n >= SGINT_LOCAL0 && n < SGINT_GIO) {
-		enable_local_irq(n - SGINT_LOCAL0);
-	} else if(n >= SGINT_GIO && n < SGINT_HPCDMA) {
-		enable_gio_irq(n - SGINT_GIO);
-	} else if(n >= SGINT_HPCDMA && n < SGINT_END) {
-		enable_hpcdma_irq(n - SGINT_HPCDMA);
-	} else {
-		panic("how did I get here?");
-	}
-}
-
-#if 0
-/*
- * Currently unused.
- */
-static void local_unex(int irq, void *data, struct pt_regs *regs)
-{
-	printk("Whee: unexpected local IRQ at %08lx\n",
-	       (unsigned long) regs->cp0_epc);
-	printk("DUMP: stat0<%x> stat1<%x> vmeistat<%x>\n",
-	       ioc_icontrol->istat0, ioc_icontrol->istat1,
-	       ioc_icontrol->vmeistat);
-}
-#endif
-
-static struct irqaction *local_irq_action[24] = {
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL
-};
-
-int setup_indy_irq(int irq, struct irqaction * new)
-{
-	printk("setup_indy_irq: Yeee, don't know how to setup irq<%d> for %s  %p\n",
-	       irq, new->name, new->handler);
-	return 0;
-}
-
-static struct irqaction r4ktimer_action = {
-	NULL, 0, 0, "R4000 timer/counter", NULL, NULL,
-};
-
-static struct irqaction indy_berr_action = {
-	NULL, 0, 0, "IP22 Bus Error", NULL, NULL,
-};
-
-static struct irqaction *irq_action[16] = {
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, &indy_berr_action, &r4ktimer_action,
-	NULL, NULL, NULL, NULL,
-	NULL, NULL, NULL, NULL
-};
-
-int get_irq_list(char *buf)
-{
-	int i, len = 0;
-	int num = 0;
-	struct irqaction * action;
-
-	for (i = 0 ; i < 16 ; i++, num++) {
-		action = irq_action[i];
-		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, " [on-chip]\n");
-	}
-	for (i = 0 ; i < 24 ; i++, num++) {
-		action = local_irq_action[i];
-		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, " [local]\n");
-	}
-	return len;
-}
-
-/*
- * do_IRQ handles IRQ's that have been installed without the
- * SA_INTERRUPT flag: it uses the full signal-handling return
- * and runs with other interrupts enabled. All relatively slow
- * IRQ's should use this format: notably the keyboard/timer
- * routines.
- */
-asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
-{
-	struct irqaction *action;
-	int do_random, cpu;
-
-	cpu = smp_processor_id();
-	irq_enter(cpu, irq);
-	kstat.irqs[0][irq]++;
-
-	panic(KERN_DEBUG "Got irq %d, press a key.", irq);
-
-	/*
-	 * mask and ack quickly, we don't want the irq controller
-	 * thinking we're snobs just because some other CPU has
-	 * disabled global interrupts (we have already done the
-	 * INT_ACK cycles, it's too late to try to pretend to the
-	 * controller that we aren't taking the interrupt).
-	 *
-	 * Commented out because we've already done this in the
-	 * machinespecific part of the handler.  It's reasonable to
-	 * do this here in a highlevel language though because that way
-	 * we could get rid of a good part of duplicated code ...
-	 */
-        /* mask_and_ack_irq(irq); */
-
-	action = *(irq + irq_action);
-	if (action) {
-		if (!(action->flags & SA_INTERRUPT))
-			__sti();
-		action = *(irq + irq_action);
-		do_random = 0;
-		do {
-			do_random |= action->flags;
-			action->handler(irq, action->dev_id, regs);
-			action = action->next;
-		} while (action);
-		if (do_random & SA_SAMPLE_RANDOM)
-			add_interrupt_randomness(irq);
-		__cli();
-	}
-	irq_exit(cpu, irq);
-
-	/* unmasking and bottom half handling is done magically for us. */
-}
-
-int request_local_irq(unsigned int lirq, void (*func)(int, void *, struct pt_regs *),
-		      unsigned long iflags, const char *dname, void *devid)
-{
-	struct irqaction *action;
-
-	lirq -= SGINT_LOCAL0;
-	if(lirq >= 24 || !func)
-		return -EINVAL;
-
-	action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
-	if(!action)
-		return -ENOMEM;
-
-	action->handler = func;
-	action->flags = iflags;
-	action->mask = 0;
-	action->name = dname;
-	action->dev_id = devid;
-	action->next = 0;
-	local_irq_action[lirq] = action;
-	enable_irq(lirq + SGINT_LOCAL0);
-	return 0;
-}
-
-void free_local_irq(unsigned int lirq, void *dev_id)
-{
-	struct irqaction *action;
-
-	lirq -= SGINT_LOCAL0;
-	if(lirq >= 24) {
-		printk("Aieee: trying to free bogus local irq %d\n",
-		       lirq + SGINT_LOCAL0);
-		return;
-	}
-	action = local_irq_action[lirq];
-	local_irq_action[lirq] = NULL;
-	disable_irq(lirq + SGINT_LOCAL0);
-	kfree(action);
-}
-
-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;
-
-	if (irq >= SGINT_END)
-		return -EINVAL;
-	if (!handler)
-		return -EINVAL;
-
-	if((irq >= SGINT_LOCAL0) && (irq < SGINT_GIO))
-		return request_local_irq(irq, handler, irqflags, devname, dev_id);
-
-	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->next = NULL;
-	action->dev_id = dev_id;
-
-	retval = setup_indy_irq(irq, action);
-
-	if (retval)
-		kfree(action);
-	return retval;
-}
-		
-void free_irq(unsigned int irq, void *dev_id)
-{
-	struct irqaction * action, **p;
-	unsigned long flags;
-
-	if (irq >= SGINT_END) {
-		printk("Trying to free IRQ%d\n",irq);
-		return;
-	}
-	if((irq >= SGINT_LOCAL0) && (irq < SGINT_GIO)) {
-		free_local_irq(irq, dev_id);
-		return;
-	}
-	for (p = irq + irq_action; (action = *p) != NULL; p = &action->next) {
-		if (action->dev_id != dev_id)
-			continue;
-
-		/* Found it - now free it */
-		save_and_cli(flags);
-		*p = action->next;
-		restore_flags(flags);
-		kfree(action);
-		return;
-	}
-	printk("Trying to free free IRQ%d\n",irq);
-}
-
-void indy_local0_irqdispatch(struct pt_regs *regs)
-{
-	struct irqaction *action;
-	unsigned char mask = ioc_icontrol->istat0;
-	unsigned char mask2 = 0;
-	int irq, cpu = smp_processor_id();;
-
-	mask &= ioc_icontrol->imask0;
-	if(mask & ISTAT0_LIO2) {
-		mask2 = ioc_icontrol->vmeistat;
-		mask2 &= ioc_icontrol->cmeimask0;
-		irq = lc2msk_to_irqnr[mask2];
-		action = local_irq_action[irq];
-	} else {
-		irq = lc0msk_to_irqnr[mask];
-		action = local_irq_action[irq];
-	}
-
-	irq_enter(cpu, irq);
-	kstat.irqs[0][irq + 16]++;
-	action->handler(irq, action->dev_id, regs);
-	irq_exit(cpu, irq);
-}
-
-void indy_local1_irqdispatch(struct pt_regs *regs)
-{
-	struct irqaction *action;
-	unsigned char mask = ioc_icontrol->istat1;
-	unsigned char mask2 = 0;
-	int irq, cpu = smp_processor_id();;
-
-	mask &= ioc_icontrol->imask1;
-	if(mask & ISTAT1_LIO3) {
-		printk("WHee: Got an LIO3 irq, winging it...\n");
-		mask2 = ioc_icontrol->vmeistat;
-		mask2 &= ioc_icontrol->cmeimask1;
-		irq = lc3msk_to_irqnr[ioc_icontrol->vmeistat];
-		action = local_irq_action[irq];
-	} else {
-		irq = lc1msk_to_irqnr[mask];
-		action = local_irq_action[irq];
-	}
-	irq_enter(cpu, irq);
-	kstat.irqs[0][irq + 24]++;
-	action->handler(irq, action->dev_id, regs);
-	irq_exit(cpu, irq);
-}
-
-void indy_buserror_irq(struct pt_regs *regs)
-{
-	int cpu = smp_processor_id();
-	int irq = 6;
-
-	irq_enter(cpu, irq);
-	kstat.irqs[0][irq]++;
-	printk("Got a bus error IRQ, shouldn't happen yet\n");
-	show_regs(regs);
-	printk("Spinning...\n");
-	while(1);
-	irq_exit(cpu, irq);
-}
-
-/* Misc. crap just to keep the kernel linking... */
-unsigned long probe_irq_on (void)
-{
-	return 0;
-}
-
-int probe_irq_off (unsigned long irqs)
-{
-	return 0;
-}
-
-static inline void sgint_init(void)
-{
-	int i;
-#ifdef CONFIG_REMOTE_DEBUG
-	char *ctype;
-#endif
-
-	sgi_i2regs = (struct sgi_int2_regs *) (KSEG1 + SGI_INT2_BASE);
-	sgi_i3regs = (struct sgi_int3_regs *) (KSEG1 + SGI_INT3_BASE);
-
-	/* Init local mask --> irq tables. */
-	for(i = 0; i < 256; i++) {
-		if(i & 0x80) {
-			lc0msk_to_irqnr[i] = 7;
-			lc1msk_to_irqnr[i] = 15;
-			lc2msk_to_irqnr[i] = 23;
-			lc3msk_to_irqnr[i] = 31;
-		} else if(i & 0x40) {
-			lc0msk_to_irqnr[i] = 6;
-			lc1msk_to_irqnr[i] = 14;
-			lc2msk_to_irqnr[i] = 22;
-			lc3msk_to_irqnr[i] = 30;
-		} else if(i & 0x20) {
-			lc0msk_to_irqnr[i] = 5;
-			lc1msk_to_irqnr[i] = 13;
-			lc2msk_to_irqnr[i] = 21;
-			lc3msk_to_irqnr[i] = 29;
-		} else if(i & 0x10) {
-			lc0msk_to_irqnr[i] = 4;
-			lc1msk_to_irqnr[i] = 12;
-			lc2msk_to_irqnr[i] = 20;
-			lc3msk_to_irqnr[i] = 28;
-		} else if(i & 0x08) {
-			lc0msk_to_irqnr[i] = 3;
-			lc1msk_to_irqnr[i] = 11;
-			lc2msk_to_irqnr[i] = 19;
-			lc3msk_to_irqnr[i] = 27;
-		} else if(i & 0x04) {
-			lc0msk_to_irqnr[i] = 2;
-			lc1msk_to_irqnr[i] = 10;
-			lc2msk_to_irqnr[i] = 18;
-			lc3msk_to_irqnr[i] = 26;
-		} else if(i & 0x02) {
-			lc0msk_to_irqnr[i] = 1;
-			lc1msk_to_irqnr[i] = 9;
-			lc2msk_to_irqnr[i] = 17;
-			lc3msk_to_irqnr[i] = 25;
-		} else if(i & 0x01) {
-			lc0msk_to_irqnr[i] = 0;
-			lc1msk_to_irqnr[i] = 8;
-			lc2msk_to_irqnr[i] = 16;
-			lc3msk_to_irqnr[i] = 24;
-		} else {
-			lc0msk_to_irqnr[i] = 0;
-			lc1msk_to_irqnr[i] = 0;
-			lc2msk_to_irqnr[i] = 0;
-			lc3msk_to_irqnr[i] = 0;
-		}
-	}
-
-	/* Indy uses an INT3, Indigo2 uses an INT2 */
-	if (sgi_guiness) {
-		ioc_icontrol = &sgi_i3regs->ints;
-		ioc_timers = &sgi_i3regs->timers;
-		ioc_tclear = &sgi_i3regs->tclear;
-	} else {
-		ioc_icontrol = &sgi_i2regs->ints;
-		ioc_timers = &sgi_i2regs->timers;
-		ioc_tclear = &sgi_i2regs->tclear;
-	}
-
-	/* Mask out all interrupts. */
-	ioc_icontrol->imask0 = 0;
-	ioc_icontrol->imask1 = 0;
-	ioc_icontrol->cmeimask0 = 0;
-	ioc_icontrol->cmeimask1 = 0;
-
-	/* Now safe to set the exception vector. */
-	set_except_vector(0, indyIRQ);
-
-#ifdef CONFIG_REMOTE_DEBUG
-	ctype = prom_getcmdline();
-	for(i = 0; i < strlen(ctype); i++) {
-		if(ctype[i]=='k' && ctype[i+1]=='g' &&
-		   ctype[i+2]=='d' && ctype[i+3]=='b' &&
-		   ctype[i+4]=='=' && ctype[i+5]=='t' &&
-		   ctype[i+6]=='t' && ctype[i+7]=='y' &&
-		   ctype[i+8]=='d' &&
-		   (ctype[i+9] == '1' || ctype[i+9] == '2')) {
-			printk("KGDB: Using serial line /dev/ttyd%d for "
-			       "session\n", (ctype[i+9] - '0'));
-				if(ctype[i+9]=='1')
-					rs_kgdb_hook(1);
-				else if(ctype[i+9]=='2')
-					rs_kgdb_hook(0);
-				else {
-					printk("KGDB: whoops bogon tty line "
-					       "requested, disabling session\n");
-				}
-
-		}
-	}
-#endif
-}
-
-void __init init_IRQ(void)
-{
-	sgint_init();
-}