[PATCH] mips: update IRQ handling for vr41xx

From: Yoichi Yuasa
Date: Mon Aug 01 2005 - 11:06:51 EST

Hi,

This patch has updated IRQ handling for vr41xx.
o added common IRQ dispatch
o changed IRQ number in int-handler.S
o added resource management to icu.c

This patch already has been applied to mips tree.
Please apply.

Yoichi

Signed-off-by: Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>

diff -urN -X dontdiff linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/Makefile linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/Makefile
--- linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/Makefile 2005-07-29 07:44:44.000000000 +0900
+++ linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/Makefile 2005-07-31 01:20:03.000000000 +0900
@@ -2,7 +2,7 @@
# Makefile for common code of the NEC VR4100 series.
#

-obj-y += bcu.o cmu.o icu.o init.o int-handler.o pmu.o
+obj-y += bcu.o cmu.o icu.o init.o int-handler.o irq.o pmu.o
obj-$(CONFIG_VRC4173) += vrc4173.o

EXTRA_AFLAGS := $(CFLAGS)
diff -urN -X dontdiff linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/icu.c linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/icu.c
--- linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/icu.c 2005-07-29 07:44:44.000000000 +0900
+++ linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/icu.c 2005-07-31 01:20:03.000000000 +0900
@@ -3,8 +3,7 @@
*
* Copyright (C) 2001-2002 MontaVista Software Inc.
* Author: Yoichi Yuasa <yyuasa@xxxxxxxxxx or source@xxxxxxxxxx>
- * Copyright (C) 2003-2004 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
- * Copyright (C) 2005 Ralf Baechle (ralf@xxxxxxxxxxxxxx)
+ * Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -31,7 +30,7 @@
*/
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/interrupt.h>
+#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/smp.h>
@@ -39,34 +38,24 @@

#include <asm/cpu.h>
#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/irq_cpu.h>
#include <asm/vr41xx/vr41xx.h>

-extern asmlinkage void vr41xx_handle_interrupt(void);
-
-extern void init_vr41xx_giuint_irq(void);
-extern void giuint_irq_dispatch(struct pt_regs *regs);
-
-static uint32_t icu1_base;
-static uint32_t icu2_base;
-
-static struct irqaction icu_cascade = {
- .handler = no_action,
- .mask = CPU_MASK_NONE,
- .name = "cascade",
-};
+static void __iomem *icu1_base;
+static void __iomem *icu2_base;

static unsigned char sysint1_assign[16] = {
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static unsigned char sysint2_assign[16] = {
- 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

-#define SYSINT1REG_TYPE1 KSEG1ADDR(0x0b000080)
-#define SYSINT2REG_TYPE1 KSEG1ADDR(0x0b000200)
+#define ICU1_TYPE1_BASE 0x0b000080UL
+#define ICU2_TYPE1_BASE 0x0b000200UL

-#define SYSINT1REG_TYPE2 KSEG1ADDR(0x0f000080)
-#define SYSINT2REG_TYPE2 KSEG1ADDR(0x0f0000a0)
+#define ICU1_TYPE2_BASE 0x0f000080UL
+#define ICU2_TYPE2_BASE 0x0f0000a0UL
+
+#define ICU1_SIZE 0x20
+#define ICU2_SIZE 0x1c

#define SYSINT1REG 0x00
#define PIUINTREG 0x02
@@ -106,61 +95,61 @@
#define SYSINT1_IRQ_TO_PIN(x) ((x) - SYSINT1_IRQ_BASE) /* Pin 0-15 */
#define SYSINT2_IRQ_TO_PIN(x) ((x) - SYSINT2_IRQ_BASE) /* Pin 0-15 */

-#define read_icu1(offset) readw(icu1_base + (offset))
-#define write_icu1(val, offset) writew((val), icu1_base + (offset))
+#define INT_TO_IRQ(x) ((x) + 2) /* Int0-4 -> IRQ2-6 */
+
+#define icu1_read(offset) readw(icu1_base + (offset))
+#define icu1_write(offset, value) writew((value), icu1_base + (offset))

-#define read_icu2(offset) readw(icu2_base + (offset))
-#define write_icu2(val, offset) writew((val), icu2_base + (offset))
+#define icu2_read(offset) readw(icu2_base + (offset))
+#define icu2_write(offset, value) writew((value), icu2_base + (offset))

#define INTASSIGN_MAX 4
#define INTASSIGN_MASK 0x0007

-static inline uint16_t set_icu1(uint8_t offset, uint16_t set)
+static inline uint16_t icu1_set(uint8_t offset, uint16_t set)
{
- uint16_t res;
+ uint16_t data;

- res = read_icu1(offset);
- res |= set;
- write_icu1(res, offset);
+ data = icu1_read(offset);
+ data |= set;
+ icu1_write(offset, data);

- return res;
+ return data;
}

-static inline uint16_t clear_icu1(uint8_t offset, uint16_t clear)
+static inline uint16_t icu1_clear(uint8_t offset, uint16_t clear)
{
- uint16_t res;
+ uint16_t data;

- res = read_icu1(offset);
- res &= ~clear;
- write_icu1(res, offset);
+ data = icu1_read(offset);
+ data &= ~clear;
+ icu1_write(offset, data);

- return res;
+ return data;
}

-static inline uint16_t set_icu2(uint8_t offset, uint16_t set)
+static inline uint16_t icu2_set(uint8_t offset, uint16_t set)
{
- uint16_t res;
+ uint16_t data;

- res = read_icu2(offset);
- res |= set;
- write_icu2(res, offset);
+ data = icu2_read(offset);
+ data |= set;
+ icu2_write(offset, data);

- return res;
+ return data;
}

-static inline uint16_t clear_icu2(uint8_t offset, uint16_t clear)
+static inline uint16_t icu2_clear(uint8_t offset, uint16_t clear)
{
- uint16_t res;
+ uint16_t data;

- res = read_icu2(offset);
- res &= ~clear;
- write_icu2(res, offset);
+ data = icu2_read(offset);
+ data &= ~clear;
+ icu2_write(offset, data);

- return res;
+ return data;
}

-/*=======================================================================*/
-
void vr41xx_enable_piuint(uint16_t mask)
{
irq_desc_t *desc = irq_desc + PIU_IRQ;
@@ -169,7 +158,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- set_icu1(MPIUINTREG, mask);
+ icu1_set(MPIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -184,7 +173,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- clear_icu1(MPIUINTREG, mask);
+ icu1_clear(MPIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -199,7 +188,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- set_icu1(MAIUINTREG, mask);
+ icu1_set(MAIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -214,7 +203,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- clear_icu1(MAIUINTREG, mask);
+ icu1_clear(MAIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -229,7 +218,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- set_icu1(MKIUINTREG, mask);
+ icu1_set(MKIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -244,7 +233,7 @@
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
spin_lock_irqsave(&desc->lock, flags);
- clear_icu1(MKIUINTREG, mask);
+ icu1_clear(MKIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -257,7 +246,7 @@
unsigned long flags;

spin_lock_irqsave(&desc->lock, flags);
- set_icu1(MDSIUINTREG, mask);
+ icu1_set(MDSIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}

@@ -269,7 +258,7 @@
unsigned long flags;

spin_lock_irqsave(&desc->lock, flags);
- clear_icu1(MDSIUINTREG, mask);
+ icu1_clear(MDSIUINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}

@@ -281,7 +270,7 @@
unsigned long flags;

spin_lock_irqsave(&desc->lock, flags);
- set_icu2(MFIRINTREG, mask);
+ icu2_set(MFIRINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}

@@ -293,7 +282,7 @@
unsigned long flags;

spin_lock_irqsave(&desc->lock, flags);
- clear_icu2(MFIRINTREG, mask);
+ icu2_clear(MFIRINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}

@@ -308,7 +297,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(PCIINT0, MPCIINTREG);
+ icu2_write(MPCIINTREG, PCIINT0);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -324,7 +313,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(0, MPCIINTREG);
+ icu2_write(MPCIINTREG, 0);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -340,7 +329,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(SCUINT0, MSCUINTREG);
+ icu2_write(MSCUINTREG, SCUINT0);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -356,7 +345,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(0, MSCUINTREG);
+ icu2_write(MSCUINTREG, 0);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -372,7 +361,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- set_icu2(MCSIINTREG, mask);
+ icu2_set(MCSIINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -388,7 +377,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- clear_icu2(MCSIINTREG, mask);
+ icu2_clear(MCSIINTREG, mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -404,7 +393,7 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(BCUINTR, MBCUINTREG);
+ icu2_write(MBCUINTREG, BCUINTR);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -420,30 +409,28 @@
current_cpu_data.cputype == CPU_VR4131 ||
current_cpu_data.cputype == CPU_VR4133) {
spin_lock_irqsave(&desc->lock, flags);
- write_icu2(0, MBCUINTREG);
+ icu2_write(MBCUINTREG, 0);
spin_unlock_irqrestore(&desc->lock, flags);
}
}

EXPORT_SYMBOL(vr41xx_disable_bcuint);

-/*=======================================================================*/
-
static unsigned int startup_sysint1_irq(unsigned int irq)
{
- set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq));
+ icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq));

return 0; /* never anything pending */
}

static void shutdown_sysint1_irq(unsigned int irq)
{
- clear_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq));
+ icu1_clear(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq));
}

static void enable_sysint1_irq(unsigned int irq)
{
- set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq));
+ icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq));
}

#define disable_sysint1_irq shutdown_sysint1_irq
@@ -452,7 +439,7 @@
static void end_sysint1_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq));
+ icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq));
}

static struct hw_interrupt_type sysint1_irq_type = {
@@ -465,23 +452,21 @@
.end = end_sysint1_irq,
};

-/*=======================================================================*/
-
static unsigned int startup_sysint2_irq(unsigned int irq)
{
- set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq));
+ icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq));

return 0; /* never anything pending */
}

static void shutdown_sysint2_irq(unsigned int irq)
{
- clear_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq));
+ icu2_clear(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq));
}

static void enable_sysint2_irq(unsigned int irq)
{
- set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq));
+ icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq));
}

#define disable_sysint2_irq shutdown_sysint2_irq
@@ -490,7 +475,7 @@
static void end_sysint2_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq));
+ icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq));
}

static struct hw_interrupt_type sysint2_irq_type = {
@@ -503,8 +488,6 @@
.end = end_sysint2_irq,
};

-/*=======================================================================*/
-
static inline int set_sysint1_assign(unsigned int irq, unsigned char assign)
{
irq_desc_t *desc = irq_desc + irq;
@@ -515,8 +498,8 @@

spin_lock_irq(&desc->lock);

- intassign0 = read_icu1(INTASSIGN0);
- intassign1 = read_icu1(INTASSIGN1);
+ intassign0 = icu1_read(INTASSIGN0);
+ intassign1 = icu1_read(INTASSIGN1);

switch (pin) {
case 0:
@@ -556,8 +539,8 @@
}

sysint1_assign[pin] = assign;
- write_icu1(intassign0, INTASSIGN0);
- write_icu1(intassign1, INTASSIGN1);
+ icu1_write(INTASSIGN0, intassign0);
+ icu1_write(INTASSIGN1, intassign1);

spin_unlock_irq(&desc->lock);

@@ -574,8 +557,8 @@

spin_lock_irq(&desc->lock);

- intassign2 = read_icu1(INTASSIGN2);
- intassign3 = read_icu1(INTASSIGN3);
+ intassign2 = icu1_read(INTASSIGN2);
+ intassign3 = icu1_read(INTASSIGN3);

switch (pin) {
case 0:
@@ -623,8 +606,8 @@
}

sysint2_assign[pin] = assign;
- write_icu1(intassign2, INTASSIGN2);
- write_icu1(intassign3, INTASSIGN3);
+ icu1_write(INTASSIGN2, intassign2);
+ icu1_write(INTASSIGN3, intassign3);

spin_unlock_irq(&desc->lock);

@@ -651,88 +634,92 @@

EXPORT_SYMBOL(vr41xx_set_intassign);

-/*=======================================================================*/
-
-asmlinkage void irq_dispatch(unsigned char intnum, struct pt_regs *regs)
+static int icu_get_irq(unsigned int irq, struct pt_regs *regs)
{
uint16_t pend1, pend2;
uint16_t mask1, mask2;
int i;

- pend1 = read_icu1(SYSINT1REG);
- mask1 = read_icu1(MSYSINT1REG);
+ pend1 = icu1_read(SYSINT1REG);
+ mask1 = icu1_read(MSYSINT1REG);

- pend2 = read_icu2(SYSINT2REG);
- mask2 = read_icu2(MSYSINT2REG);
+ pend2 = icu2_read(SYSINT2REG);
+ mask2 = icu2_read(MSYSINT2REG);

mask1 &= pend1;
mask2 &= pend2;

if (mask1) {
for (i = 0; i < 16; i++) {
- if (intnum == sysint1_assign[i] &&
- (mask1 & ((uint16_t)1 << i))) {
- if (i == 8)
- giuint_irq_dispatch(regs);
- else
- do_IRQ(SYSINT1_IRQ(i), regs);
- return;
- }
+ if (irq == INT_TO_IRQ(sysint1_assign[i]) && (mask1 & (1 << i)))
+ return SYSINT1_IRQ(i);
}
}

if (mask2) {
for (i = 0; i < 16; i++) {
- if (intnum == sysint2_assign[i] &&
- (mask2 & ((uint16_t)1 << i))) {
- do_IRQ(SYSINT2_IRQ(i), regs);
- return;
- }
+ if (irq == INT_TO_IRQ(sysint2_assign[i]) && (mask2 & (1 << i)))
+ return SYSINT2_IRQ(i);
}
}

printk(KERN_ERR "spurious ICU interrupt: %04x,%04x\n", pend1, pend2);

atomic_inc(&irq_err_count);
-}

-/*=======================================================================*/
+ return -1;
+}

static int __init vr41xx_icu_init(void)
{
+ unsigned long icu1_start, icu2_start;
+ int i;
+
switch (current_cpu_data.cputype) {
case CPU_VR4111:
case CPU_VR4121:
- icu1_base = SYSINT1REG_TYPE1;
- icu2_base = SYSINT2REG_TYPE1;
+ icu1_start = ICU1_TYPE1_BASE;
+ icu2_start = ICU2_TYPE1_BASE;
break;
case CPU_VR4122:
case CPU_VR4131:
case CPU_VR4133:
- icu1_base = SYSINT1REG_TYPE2;
- icu2_base = SYSINT2REG_TYPE2;
+ icu1_start = ICU1_TYPE2_BASE;
+ icu2_start = ICU2_TYPE2_BASE;
break;
default:
printk(KERN_ERR "ICU: Unexpected CPU of NEC VR4100 series\n");
- return -EINVAL;
+ return -ENODEV;
}

- write_icu1(0, MSYSINT1REG);
- write_icu1(0xffff, MGIUINTLREG);
+ if (request_mem_region(icu1_start, ICU1_SIZE, "ICU") == NULL)
+ return -EBUSY;

- write_icu2(0, MSYSINT2REG);
- write_icu2(0xffff, MGIUINTHREG);
+ if (request_mem_region(icu2_start, ICU2_SIZE, "ICU") == NULL) {
+ release_mem_region(icu1_start, ICU1_SIZE);
+ return -EBUSY;
+ }

- return 0;
-}
+ icu1_base = ioremap(icu1_start, ICU1_SIZE);
+ if (icu1_base == NULL) {
+ release_mem_region(icu1_start, ICU1_SIZE);
+ release_mem_region(icu2_start, ICU2_SIZE);
+ return -ENOMEM;
+ }

-early_initcall(vr41xx_icu_init);
+ icu2_base = ioremap(icu2_start, ICU2_SIZE);
+ if (icu2_base == NULL) {
+ iounmap(icu1_base);
+ release_mem_region(icu1_start, ICU1_SIZE);
+ release_mem_region(icu2_start, ICU2_SIZE);
+ return -ENOMEM;
+ }

-/*=======================================================================*/
+ icu1_write(MSYSINT1REG, 0);
+ icu1_write(MGIUINTLREG, 0xffff);

-static inline void init_vr41xx_icu_irq(void)
-{
- int i;
+ icu2_write(MSYSINT2REG, 0);
+ icu2_write(MGIUINTHREG, 0xffff);

for (i = SYSINT1_IRQ_BASE; i <= SYSINT1_IRQ_LAST; i++)
irq_desc[i].handler = &sysint1_irq_type;
@@ -740,18 +727,13 @@
for (i = SYSINT2_IRQ_BASE; i <= SYSINT2_IRQ_LAST; i++)
irq_desc[i].handler = &sysint2_irq_type;

- setup_irq(INT0_CASCADE_IRQ, &icu_cascade);
- setup_irq(INT1_CASCADE_IRQ, &icu_cascade);
- setup_irq(INT2_CASCADE_IRQ, &icu_cascade);
- setup_irq(INT3_CASCADE_IRQ, &icu_cascade);
- setup_irq(INT4_CASCADE_IRQ, &icu_cascade);
-}
+ cascade_irq(INT0_IRQ, icu_get_irq);
+ cascade_irq(INT1_IRQ, icu_get_irq);
+ cascade_irq(INT2_IRQ, icu_get_irq);
+ cascade_irq(INT3_IRQ, icu_get_irq);
+ cascade_irq(INT4_IRQ, icu_get_irq);

-void __init arch_init_irq(void)
-{
- mips_cpu_irq_init(MIPS_CPU_IRQ_BASE);
- init_vr41xx_icu_irq();
- init_vr41xx_giuint_irq();
-
- set_except_vector(0, vr41xx_handle_interrupt);
+ return 0;
}
+
+core_initcall(vr41xx_icu_init);
diff -urN -X dontdiff linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/int-handler.S linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/int-handler.S
--- linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/int-handler.S 2005-07-29 07:44:44.000000000 +0900
+++ linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/int-handler.S 2005-07-31 01:20:03.000000000 +0900
@@ -71,24 +71,24 @@

andi t1, t0, CAUSEF_IP3 # check for Int1
bnez t1, handle_int
- li a0, 1
+ li a0, 3

andi t1, t0, CAUSEF_IP4 # check for Int2
bnez t1, handle_int
- li a0, 2
+ li a0, 4

andi t1, t0, CAUSEF_IP5 # check for Int3
bnez t1, handle_int
- li a0, 3
+ li a0, 5

andi t1, t0, CAUSEF_IP6 # check for Int4
bnez t1, handle_int
- li a0, 4
+ li a0, 6

1:
andi t1, t0, CAUSEF_IP2 # check for Int0
bnez t1, handle_int
- li a0, 0
+ li a0, 2

andi t1, t0, CAUSEF_IP0 # check for IP0
bnez t1, handle_irq
diff -urN -X dontdiff linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/irq.c linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/irq.c
--- linux-2.6.13-rc4-git2-orig/arch/mips/vr41xx/common/irq.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.13-rc4-git2/arch/mips/vr41xx/common/irq.c 2005-07-31 01:20:08.000000000 +0900
@@ -0,0 +1,94 @@
+/*
+ * Interrupt handing routines for NEC VR4100 series.
+ *
+ * Copyright (C) 2005 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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
+ */
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/system.h>
+#include <asm/vr41xx/vr41xx.h>
+
+typedef struct irq_cascade {
+ int (*get_irq)(unsigned int, struct pt_regs *);
+} irq_cascade_t;
+
+static irq_cascade_t irq_cascade[NR_IRQS] __cacheline_aligned;
+
+static struct irqaction cascade_irqaction = {
+ .handler = no_action,
+ .mask = CPU_MASK_NONE,
+ .name = "cascade",
+};
+
+int cascade_irq(unsigned int irq, int (*get_irq)(unsigned int, struct pt_regs *))
+{
+ int retval = 0;
+
+ if (irq >= NR_IRQS)
+ return -EINVAL;
+
+ if (irq_cascade[irq].get_irq != NULL)
+ free_irq(irq, NULL);
+
+ irq_cascade[irq].get_irq = get_irq;
+
+ if (get_irq != NULL) {
+ retval = setup_irq(irq, &cascade_irqaction);
+ if (retval < 0)
+ irq_cascade[irq].get_irq = NULL;
+ }
+
+ return retval;
+}
+
+EXPORT_SYMBOL_GPL(cascade_irq);
+
+asmlinkage void irq_dispatch(unsigned int irq, struct pt_regs *regs)
+{
+ irq_cascade_t *cascade;
+ irq_desc_t *desc;
+
+ if (irq >= NR_IRQS) {
+ atomic_inc(&irq_err_count);
+ return;
+ }
+
+ cascade = irq_cascade + irq;
+ if (cascade->get_irq != NULL) {
+ unsigned int source_irq = irq;
+ desc = irq_desc + source_irq;
+ desc->handler->ack(source_irq);
+ irq = cascade->get_irq(irq, regs);
+ if (irq < 0)
+ atomic_inc(&irq_err_count);
+ else
+ irq_dispatch(irq, regs);
+ desc->handler->end(source_irq);
+ } else
+ do_IRQ(irq, regs);
+}
+
+extern asmlinkage void vr41xx_handle_interrupt(void);
+
+void __init arch_init_irq(void)
+{
+ mips_cpu_irq_init(MIPS_CPU_IRQ_BASE);
+
+ set_except_vector(0, vr41xx_handle_interrupt);
+}
diff -urN -X dontdiff linux-2.6.13-rc4-git2-orig/include/asm-mips/vr41xx/vr41xx.h linux-2.6.13-rc4-git2/include/asm-mips/vr41xx/vr41xx.h
--- linux-2.6.13-rc4-git2-orig/include/asm-mips/vr41xx/vr41xx.h 2005-07-29 07:44:44.000000000 +0900
+++ linux-2.6.13-rc4-git2/include/asm-mips/vr41xx/vr41xx.h 2005-07-31 01:20:03.000000000 +0900
@@ -7,7 +7,7 @@
* Copyright (C) 2001, 2002 Paul Mundt
* Copyright (C) 2002 MontaVista Software, Inc.
* Copyright (C) 2002 TimeSys Corp.
- * Copyright (C) 2003-2004 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
+ * Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -79,11 +79,11 @@
#define MIPS_CPU_IRQ(x) (MIPS_CPU_IRQ_BASE + (x))
#define MIPS_SOFTINT0_IRQ MIPS_CPU_IRQ(0)
#define MIPS_SOFTINT1_IRQ MIPS_CPU_IRQ(1)
-#define INT0_CASCADE_IRQ MIPS_CPU_IRQ(2)
-#define INT1_CASCADE_IRQ MIPS_CPU_IRQ(3)
-#define INT2_CASCADE_IRQ MIPS_CPU_IRQ(4)
-#define INT3_CASCADE_IRQ MIPS_CPU_IRQ(5)
-#define INT4_CASCADE_IRQ MIPS_CPU_IRQ(6)
+#define INT0_IRQ MIPS_CPU_IRQ(2)
+#define INT1_IRQ MIPS_CPU_IRQ(3)
+#define INT2_IRQ MIPS_CPU_IRQ(4)
+#define INT3_IRQ MIPS_CPU_IRQ(5)
+#define INT4_IRQ MIPS_CPU_IRQ(6)
#define TIMER_IRQ MIPS_CPU_IRQ(7)

/* SYINT1 Interrupt Numbers */
@@ -97,7 +97,7 @@
#define PIU_IRQ SYSINT1_IRQ(5)
#define AIU_IRQ SYSINT1_IRQ(6)
#define KIU_IRQ SYSINT1_IRQ(7)
-#define GIUINT_CASCADE_IRQ SYSINT1_IRQ(8)
+#define GIUINT_IRQ SYSINT1_IRQ(8)
#define SIU_IRQ SYSINT1_IRQ(9)
#define BUSERR_IRQ SYSINT1_IRQ(10)
#define SOFTINT_IRQ SYSINT1_IRQ(11)
@@ -128,7 +128,7 @@
#define GIU_IRQ_LAST GIU_IRQ(31)

extern int vr41xx_set_intassign(unsigned int irq, unsigned char intassign);
-extern int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq));
+extern int cascade_irq(unsigned int irq, int (*get_irq)(unsigned int, struct pt_regs *));

#define PIUINT_COMMAND 0x0040
#define PIUINT_DATA 0x0020
-
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