patch-2.4.19 linux-2.4.19/arch/mips/sgi/kernel/indy_int.c

• Lines: 529
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips/sgi/kernel/indy_int.c
• Orig date: Sun Sep 9 10:43:02 2001

diff -urN linux-2.4.18/arch/mips/sgi/kernel/indy_int.c linux-2.4.19/arch/mips/sgi/kernel/indy_int.c
@@ -1,528 +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
- *                    - Interrupt handling fixes
- */
-#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>
-#include <asm/sgialib.h>
-#include <asm/gdb-stub.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.
- */
-
-/* #define DEBUG_SGINT */
-
-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);
-
-/* 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)
- */
-static void enable_local0_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	ioc_icontrol->imask0 |= (1 << (irq - SGINT_LOCAL0));
-	restore_flags(flags);
-}
-
-static unsigned int startup_local0_irq(unsigned int irq)
-{
-	enable_local0_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-static void disable_local0_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	ioc_icontrol->imask0 &= ~(1 << (irq - SGINT_LOCAL0));
-	restore_flags(flags);
-}
-
-#define shutdown_local0_irq	disable_local0_irq
-#define mask_and_ack_local0_irq	disable_local0_irq
-
-static void end_local0_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_local0_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_local0_irq_type = {
-	"IP22 local 0",
-	startup_local0_irq,
-	shutdown_local0_irq,
-	enable_local0_irq,
-	disable_local0_irq,
-	mask_and_ack_local0_irq,
-	end_local0_irq,
-	NULL
-};
-
-static void enable_local1_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	ioc_icontrol->imask1 |= (1 << (irq - SGINT_LOCAL1));
-	restore_flags(flags);
-}
-
-static unsigned int startup_local1_irq(unsigned int irq)
-{
-	enable_local1_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-void disable_local1_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	ioc_icontrol->imask1 &= ~(1 << (irq- SGINT_LOCAL1));
-	restore_flags(flags);
-}
-
-#define shutdown_local1_irq	disable_local1_irq
-#define mask_and_ack_local1_irq	disable_local1_irq
-
-static void end_local1_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_local1_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_local1_irq_type = {
-	"IP22 local 1",
-	startup_local1_irq,
-	shutdown_local1_irq,
-	enable_local1_irq,
-	disable_local1_irq,
-	mask_and_ack_local1_irq,
-	end_local1_irq,
-	NULL
-};
-
-static void enable_local2_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	enable_local0_irq(7);
-	ioc_icontrol->cmeimask0 |= (1 << (irq - SGINT_LOCAL2));
-	restore_flags(flags);
-}
-
-static unsigned int startup_local2_irq(unsigned int irq)
-{
-	enable_local2_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-void disable_local2_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	ioc_icontrol->cmeimask0 &= ~(1 << (irq - SGINT_LOCAL2));
-	restore_flags(flags);
-}
-
-#define shutdown_local2_irq disable_local2_irq
-#define mask_and_ack_local2_irq	disable_local2_irq
-
-static void end_local2_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_local2_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_local2_irq_type = {
-	"IP22 local 2",
-	startup_local2_irq,
-	shutdown_local2_irq,
-	enable_local2_irq,
-	disable_local2_irq,
-	mask_and_ack_local2_irq,
-	end_local2_irq,
-	NULL
-};
-
-static void enable_local3_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	printk("Yeeee, got passed irq_nr %d at enable_local3_irq\n", irq);
-	panic("INVALID IRQ level!");
-	restore_flags(flags);
-}
-
-static unsigned int startup_local3_irq(unsigned int irq)
-{
-	enable_local3_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-void disable_local3_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	save_and_cli(flags);
-	/*
-	 * 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_local3_irq\n", irq);
-	panic("INVALID IRQ level!");
-	restore_flags(flags);
-}
-
-#define shutdown_local3_irq disable_local3_irq
-#define mask_and_ack_local3_irq	disable_local3_irq
-
-static void end_local3_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_local3_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_local3_irq_type = {
-	"IP22 local 3",
-	startup_local3_irq,
-	shutdown_local3_irq,
-	enable_local3_irq,
-	disable_local3_irq,
-	mask_and_ack_local3_irq,
-	end_local3_irq,
-	NULL
-};
-
-void enable_gio_irq(unsigned int irq)
-{
-	/* XXX TODO XXX */
-}
-
-static unsigned int startup_gio_irq(unsigned int irq)
-{
-	enable_gio_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-void disable_gio_irq(unsigned int irq)
-{
-	/* XXX TODO XXX */
-}
-
-#define shutdown_gio_irq	disable_gio_irq
-#define mask_and_ack_gio_irq	disable_gio_irq
-
-static void end_gio_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_gio_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_gio_irq_type = {
-	"IP22 GIO",
-	startup_gio_irq,
-	shutdown_gio_irq,
-	enable_gio_irq,
-	disable_gio_irq,
-	mask_and_ack_gio_irq,
-	end_gio_irq,
-	NULL
-};
-
-void enable_hpcdma_irq(unsigned int irq)
-{
-	/* XXX TODO XXX */
-}
-
-static unsigned int startup_hpcdma_irq(unsigned int irq)
-{
-	enable_hpcdma_irq(irq);
-
-	return 0;		/* Never anything pending  */
-}
-
-void disable_hpcdma_irq(unsigned int irq)
-{
-	/* XXX TODO XXX */
-}
-
-#define shutdown_hpcdma_irq	disable_hpcdma_irq
-#define mask_and_ack_hpcdma_irq	disable_hpcdma_irq
-
-static void end_hpcdma_irq (unsigned int irq)
-{
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_hpcdma_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_hpcdma_irq_type = {
-	"IP22 HPC DMA",
-	startup_hpcdma_irq,
-	shutdown_hpcdma_irq,
-	enable_hpcdma_irq,
-	disable_hpcdma_irq,
-	mask_and_ack_hpcdma_irq,
-	end_hpcdma_irq,
-	NULL
-};
-
-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
-};
-
-void indy_local0_irqdispatch(struct pt_regs *regs)
-{
-	unsigned char mask = ioc_icontrol->istat0;
-	unsigned char mask2 = 0;
-	int irq;
-
-	mask &= ioc_icontrol->imask0;
-	if (mask & ISTAT0_LIO2) {
-		mask2 = ioc_icontrol->vmeistat;
-		mask2 &= ioc_icontrol->cmeimask0;
-		irq = lc2msk_to_irqnr[mask2];
-	} else {
-		irq = lc0msk_to_irqnr[mask];
-	}
-
-	/* if irq == 0, then the interrupt has already been cleared */
-	if (irq == 0)
-		goto end;
-
-	do_IRQ(irq, regs);
-	goto end;
-
-no_handler:
-	printk("No handler for local0 irq: %i\n", irq);
-
-end:	
-	return;
-}
-
-void indy_local1_irqdispatch(struct pt_regs *regs)
-{
-	unsigned char mask = ioc_icontrol->istat1;
-	unsigned char mask2 = 0;
-	int irq;
-
-	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];
-	} else {
-		irq = lc1msk_to_irqnr[mask];
-	}
-
-	/* if irq == 0, then the interrupt has already been cleared */
-	/* not sure if it is needed here, but it is needed for local0 */
-	if (irq == 0)
-		goto end;
-
-	do_IRQ(irq, regs);
-	goto end;
-	
-no_handler:
-	printk("No handler for local1 irq: %i\n", irq);
-
-end:	
-	return;	
-}
-
-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);
-}
-
-void __init init_IRQ(void)
-{
-	int i;
-
-	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;
-
-	set_except_vector(0, indyIRQ);
-
-	init_generic_irq();
-
-	for (i = SGINT_LOCAL0; i < SGINT_END; i++) {
-		hw_irq_controller *handler;
-
-		if (i < SGINT_LOCAL1)
-			handler		= &ip22_local0_irq_type;
-		else if (i < SGINT_LOCAL2)
-			handler		= &ip22_local1_irq_type;
-		else if (i < SGINT_LOCAL3)
-			handler		= &ip22_local2_irq_type;
-		else if (i < SGINT_GIO)
-			handler		= &ip22_local3_irq_type;
-		else if (i < SGINT_HPCDMA)
-			handler		= &ip22_gio_irq_type;
-		else if (i < SGINT_END)
-			handler		= &ip22_hpcdma_irq_type;
-
-		irq_desc[i].status	= IRQ_DISABLED;
-		irq_desc[i].action	= 0;
-		irq_desc[i].depth	= 1;
-		irq_desc[i].handler	= handler;
-	}
-}