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ar7: speed up irq handlers, fix asm/ar7/ar7.h 

SVN-Revision: 6723
owl
Eugene Konev 2007-03-27 14:56:34 +00:00
parent 067704996a
commit 34fd376368
2 changed files with 79 additions and 34 deletions
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104
target/linux/ar7-2.6/files/arch/mips/ar7/irq.c
View File

@ -31,14 +31,15 @@
#define PACE_OFFSET 0xA0
#define CHNLS_OFFSET 0x200
#define IRQ_NUM(irq) (irq % 40 % 32)
#define REG_OFFSET(irq, reg) (((irq) < 40) ? \
((irq) / 32 * 0x4 + reg * 0x10) : \
(EXCEPT_OFFSET + reg * 0x8))
#define SR_OFFSET(irq) (REG_OFFSET(irq, 0))
#define REG_OFFSET(irq, reg) ((irq) / 32 * 0x4 + reg * 0x10)
#define SEC_REG_OFFSET(reg) (EXCEPT_OFFSET + reg * 0x8)
#define SR_OFFSET (SEC_REG_OFFSET(0))
#define CR_OFFSET(irq) (REG_OFFSET(irq, 1))
#define SEC_CR_OFFSET (SEC_REG_OFFSET(1))
#define ESR_OFFSET(irq) (REG_OFFSET(irq, 2))
#define SEC_ESR_OFFSET (SEC_REG_OFFSET(2))
#define ECR_OFFSET(irq) (REG_OFFSET(irq, 3))
#define SEC_ECR_OFFSET (SEC_REG_OFFSET(3))
#define PIR_OFFSET (0x40)
#define MSR_OFFSET (0x44)
#define PM_OFFSET(irq) (REG_OFFSET(irq, 5))
@ -50,8 +51,12 @@
static void ar7_unmask_irq(unsigned int irq_nr);
static void ar7_mask_irq(unsigned int irq_nr);
static void ar7_unmask_secondary_irq(unsigned int irq_nr);
static void ar7_mask_secondary_irq(unsigned int irq_nr);
static irqreturn_t ar7_cascade(int interrupt, void *dev);
void ar7_irq_init(int);
static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev);
static void ar7_irq_init(int base);
static int ar7_irq_base;
static struct irq_chip ar7_irq_type = {
.name = "AR7",
@ -59,20 +64,28 @@ static struct irq_chip ar7_irq_type = {
.mask = ar7_mask_irq,
};
static int ar7_irq_base;
static struct irq_chip ar7_secondary_irq_type = {
.name = "AR7",
.unmask = ar7_unmask_secondary_irq,
.mask = ar7_mask_secondary_irq,
};
static struct irqaction ar7_cascade_action = {
.handler = ar7_cascade,
.name = "AR7 cascade interrupt"
};
static struct irqaction ar7_secondary_cascade_action = {
.handler = ar7_secondary_cascade,
.name = "AR7 secondary cascade interrupt"
};
static void ar7_unmask_irq(unsigned int irq)
{
unsigned long flags;
local_irq_save(flags);
/* enable the interrupt channel bit */
REG(ESR_OFFSET(irq - ar7_irq_base)) = 1 << IRQ_NUM(irq - ar7_irq_base);
REG(ESR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32);
local_irq_restore(flags);
}
@ -81,7 +94,25 @@ static void ar7_mask_irq(unsigned int irq)
unsigned long flags;
local_irq_save(flags);
/* disable the interrupt channel bit */
REG(ECR_OFFSET(irq - ar7_irq_base)) = 1 << IRQ_NUM(irq - ar7_irq_base);
REG(ECR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32);
local_irq_restore(flags);
}
static void ar7_unmask_secondary_irq(unsigned int irq)
{
unsigned long flags;
local_irq_save(flags);
/* enable the interrupt channel bit */
REG(SEC_ESR_OFFSET) = 1 << (irq - ar7_irq_base - 40);
local_irq_restore(flags);
}
static void ar7_mask_secondary_irq(unsigned int irq)
{
unsigned long flags;
local_irq_save(flags);
/* disable the interrupt channel bit */
REG(SEC_ECR_OFFSET) = 1 << (irq - ar7_irq_base - 40);
local_irq_restore(flags);
}
@ -90,7 +121,7 @@ void __init arch_init_irq(void) {
ar7_irq_init(8);
}
void __init ar7_irq_init(int base)
static void __init ar7_irq_init(int base)
{
int i;
/*
@ -98,54 +129,67 @@ void __init ar7_irq_init(int base)
*/
REG(ECR_OFFSET(0)) = 0xffffffff;
REG(ECR_OFFSET(32)) = 0xff;
REG(ECR_OFFSET(40)) = 0xffffffff;
REG(SEC_ECR_OFFSET) = 0xffffffff;
REG(CR_OFFSET(0)) = 0xffffffff;
REG(CR_OFFSET(32)) = 0xff;
REG(CR_OFFSET(40)) = 0xffffffff;
REG(SEC_CR_OFFSET) = 0xffffffff;
ar7_irq_base = base;
for(i = 0; i < 40; i++) {
REG(CHNL_OFFSET(i)) = i;
/* Primary IRQ's */
irq_desc[i + base].status = IRQ_DISABLED;
irq_desc[i + base].action = 0;
irq_desc[i + base].action = NULL;
irq_desc[i + base].depth = 1;
irq_desc[i + base].chip = &ar7_irq_type;
/* Secondary IRQ's */
if (i < 32) {
irq_desc[i + base + 40].status = IRQ_DISABLED;
irq_desc[i + base + 40].action = 0;
irq_desc[i + base + 40].action = NULL;
irq_desc[i + base + 40].depth = 1;
irq_desc[i + base + 40].chip =
&ar7_irq_type;
irq_desc[i + base + 40].chip = &ar7_secondary_irq_type;
}
}
ar7_irq_base = base;
setup_irq(2, &ar7_cascade_action);
setup_irq(ar7_irq_base, &ar7_secondary_cascade_action);
set_c0_status(IE_IRQ0);
}
static irqreturn_t ar7_cascade(int interrupt, void *dev)
{
int irq, i;
unsigned long status;
int irq;
irq = (REG(PIR_OFFSET) & 0x3F);
if (irq == 40) return IRQ_NONE;
if (irq > 0) {
REG(CR_OFFSET(irq)) = 1 << IRQ_NUM(irq);
} else {
status = REG(SR_OFFSET(40));
for (i = 0; i < 32; i++) {
REG(CR_OFFSET(irq)) = 1 << (irq % 32);
do_IRQ(irq + ar7_irq_base);
return IRQ_HANDLED;
}
static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev)
{
int irq = 0, i;
unsigned long status;
status = REG(SR_OFFSET);
if (unlikely(!status)) {
spurious_interrupt();
return IRQ_NONE;
}
for (i = 0; i < 32; i++)
if (status & (i << 1)) {
irq = i + 40;
REG(CR_OFFSET(irq)) = 1 << i;
REG(SEC_CR_OFFSET) = 1 << i;
break;
}
}
REG(CR_OFFSET(0)) = 1;
}
return do_IRQ(irq + ar7_irq_base);
do_IRQ(irq + ar7_irq_base);
return IRQ_HANDLED;
}
asmlinkage void plat_irq_dispatch(void)

3
target/linux/ar7-2.6/files/include/asm-mips/ar7/ar7.h
View File

@ -21,8 +21,9 @@
#ifndef __AR7_H__
#define __AR7_H__
#include <asm/addrspace.h>
#include <linux/delay.h>
#include <asm/addrspace.h>
#include <asm/io.h>
#define AR7_REGS_BASE 0x08610000