661 lines
18 KiB
C
661 lines
18 KiB
C
/*
|
|
* BRIEF MODULE DESCRIPTION
|
|
* Au1000 interrupt routines.
|
|
*
|
|
* Copyright 2001 MontaVista Software Inc.
|
|
* Author: MontaVista Software, Inc.
|
|
* ppopov@mvista.com or source@mvista.com
|
|
*
|
|
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* 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.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/module.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/delay.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/system.h>
|
|
#include <asm/mach-au1x00/au1000.h>
|
|
#ifdef CONFIG_MIPS_PB1000
|
|
#include <asm/mach-pb1x00/pb1000.h>
|
|
#endif
|
|
|
|
#undef DEBUG_IRQ
|
|
#ifdef DEBUG_IRQ
|
|
/* note: prints function name for you */
|
|
#define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
|
|
#else
|
|
#define DPRINTK(fmt, args...)
|
|
#endif
|
|
|
|
#define EXT_INTC0_REQ0 2 /* IP 2 */
|
|
#define EXT_INTC0_REQ1 3 /* IP 3 */
|
|
#define EXT_INTC1_REQ0 4 /* IP 4 */
|
|
#define EXT_INTC1_REQ1 5 /* IP 5 */
|
|
#define MIPS_TIMER_IP 7 /* IP 7 */
|
|
|
|
extern void set_debug_traps(void);
|
|
extern irq_cpustat_t irq_stat [NR_CPUS];
|
|
extern void mips_timer_interrupt(void);
|
|
|
|
static void setup_local_irq(unsigned int irq, int type, int int_req);
|
|
static void end_irq(unsigned int irq_nr);
|
|
static inline void mask_and_ack_level_irq(unsigned int irq_nr);
|
|
static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr);
|
|
static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr);
|
|
static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr);
|
|
inline void local_enable_irq(unsigned int irq_nr);
|
|
inline void local_disable_irq(unsigned int irq_nr);
|
|
|
|
void (*board_init_irq)(void);
|
|
|
|
static DEFINE_SPINLOCK(irq_lock);
|
|
|
|
|
|
inline void local_enable_irq(unsigned int irq_nr)
|
|
{
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
au_writel(1<<(irq_nr-32), IC1_MASKSET);
|
|
au_writel(1<<(irq_nr-32), IC1_WAKESET);
|
|
}
|
|
else {
|
|
au_writel(1<<irq_nr, IC0_MASKSET);
|
|
au_writel(1<<irq_nr, IC0_WAKESET);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
inline void local_disable_irq(unsigned int irq_nr)
|
|
{
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
au_writel(1<<(irq_nr-32), IC1_MASKCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_WAKECLR);
|
|
}
|
|
else {
|
|
au_writel(1<<irq_nr, IC0_MASKCLR);
|
|
au_writel(1<<irq_nr, IC0_WAKECLR);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr)
|
|
{
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_MASKCLR);
|
|
}
|
|
else {
|
|
au_writel(1<<irq_nr, IC0_RISINGCLR);
|
|
au_writel(1<<irq_nr, IC0_MASKCLR);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr)
|
|
{
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_MASKCLR);
|
|
}
|
|
else {
|
|
au_writel(1<<irq_nr, IC0_FALLINGCLR);
|
|
au_writel(1<<irq_nr, IC0_MASKCLR);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr)
|
|
{
|
|
/* This may assume that we don't get interrupts from
|
|
* both edges at once, or if we do, that we don't care.
|
|
*/
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_MASKCLR);
|
|
}
|
|
else {
|
|
au_writel(1<<irq_nr, IC0_FALLINGCLR);
|
|
au_writel(1<<irq_nr, IC0_RISINGCLR);
|
|
au_writel(1<<irq_nr, IC0_MASKCLR);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
static inline void mask_and_ack_level_irq(unsigned int irq_nr)
|
|
{
|
|
|
|
local_disable_irq(irq_nr);
|
|
au_sync();
|
|
#if defined(CONFIG_MIPS_PB1000)
|
|
if (irq_nr == AU1000_GPIO_15) {
|
|
au_writel(0x8000, PB1000_MDR); /* ack int */
|
|
au_sync();
|
|
}
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
|
|
static void end_irq(unsigned int irq_nr)
|
|
{
|
|
if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
|
|
local_enable_irq(irq_nr);
|
|
}
|
|
#if defined(CONFIG_MIPS_PB1000)
|
|
if (irq_nr == AU1000_GPIO_15) {
|
|
au_writel(0x4000, PB1000_MDR); /* enable int */
|
|
au_sync();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
unsigned long save_local_and_disable(int controller)
|
|
{
|
|
int i;
|
|
unsigned long flags, mask;
|
|
|
|
spin_lock_irqsave(&irq_lock, flags);
|
|
if (controller) {
|
|
mask = au_readl(IC1_MASKSET);
|
|
for (i=32; i<64; i++) {
|
|
local_disable_irq(i);
|
|
}
|
|
}
|
|
else {
|
|
mask = au_readl(IC0_MASKSET);
|
|
for (i=0; i<32; i++) {
|
|
local_disable_irq(i);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&irq_lock, flags);
|
|
|
|
return mask;
|
|
}
|
|
|
|
void restore_local_and_enable(int controller, unsigned long mask)
|
|
{
|
|
int i;
|
|
unsigned long flags, new_mask;
|
|
|
|
spin_lock_irqsave(&irq_lock, flags);
|
|
for (i=0; i<32; i++) {
|
|
if (mask & (1<<i)) {
|
|
if (controller)
|
|
local_enable_irq(i+32);
|
|
else
|
|
local_enable_irq(i);
|
|
}
|
|
}
|
|
if (controller)
|
|
new_mask = au_readl(IC1_MASKSET);
|
|
else
|
|
new_mask = au_readl(IC0_MASKSET);
|
|
|
|
spin_unlock_irqrestore(&irq_lock, flags);
|
|
}
|
|
|
|
|
|
static struct irq_chip rise_edge_irq_type = {
|
|
.typename = "Au1000 Rise Edge",
|
|
.ack = mask_and_ack_rise_edge_irq,
|
|
.mask = local_disable_irq,
|
|
.mask_ack = mask_and_ack_rise_edge_irq,
|
|
.unmask = local_enable_irq,
|
|
.end = end_irq,
|
|
};
|
|
|
|
static struct irq_chip fall_edge_irq_type = {
|
|
.typename = "Au1000 Fall Edge",
|
|
.ack = mask_and_ack_fall_edge_irq,
|
|
.mask = local_disable_irq,
|
|
.mask_ack = mask_and_ack_fall_edge_irq,
|
|
.unmask = local_enable_irq,
|
|
.end = end_irq,
|
|
};
|
|
|
|
static struct irq_chip either_edge_irq_type = {
|
|
.typename = "Au1000 Rise or Fall Edge",
|
|
.ack = mask_and_ack_either_edge_irq,
|
|
.mask = local_disable_irq,
|
|
.mask_ack = mask_and_ack_either_edge_irq,
|
|
.unmask = local_enable_irq,
|
|
.end = end_irq,
|
|
};
|
|
|
|
static struct irq_chip level_irq_type = {
|
|
.typename = "Au1000 Level",
|
|
.ack = mask_and_ack_level_irq,
|
|
.mask = local_disable_irq,
|
|
.mask_ack = mask_and_ack_level_irq,
|
|
.unmask = local_enable_irq,
|
|
.end = end_irq,
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
void startup_match20_interrupt(irq_handler_t handler)
|
|
{
|
|
struct irq_desc *desc = &irq_desc[AU1000_TOY_MATCH2_INT];
|
|
|
|
static struct irqaction action;
|
|
memset(&action, 0, sizeof(struct irqaction));
|
|
|
|
/* This is a big problem.... since we didn't use request_irq
|
|
* when kernel/irq.c calls probe_irq_xxx this interrupt will
|
|
* be probed for usage. This will end up disabling the device :(
|
|
* Give it a bogus "action" pointer -- this will keep it from
|
|
* getting auto-probed!
|
|
*
|
|
* By setting the status to match that of request_irq() we
|
|
* can avoid it. --cgray
|
|
*/
|
|
action.dev_id = handler;
|
|
action.flags = IRQF_DISABLED;
|
|
cpus_clear(action.mask);
|
|
action.name = "Au1xxx TOY";
|
|
action.handler = handler;
|
|
action.next = NULL;
|
|
|
|
desc->action = &action;
|
|
desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT | IRQ_WAITING | IRQ_INPROGRESS);
|
|
|
|
local_enable_irq(AU1000_TOY_MATCH2_INT);
|
|
}
|
|
#endif
|
|
|
|
static void setup_local_irq(unsigned int irq_nr, int type, int int_req)
|
|
{
|
|
if (irq_nr > AU1000_MAX_INTR) return;
|
|
/* Config2[n], Config1[n], Config0[n] */
|
|
if (irq_nr > AU1000_LAST_INTC0_INT) {
|
|
switch (type) {
|
|
case INTC_INT_RISE_EDGE: /* 0:0:1 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0SET);
|
|
set_irq_chip(irq_nr, &rise_edge_irq_type);
|
|
break;
|
|
case INTC_INT_FALL_EDGE: /* 0:1:0 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1SET);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
|
|
set_irq_chip(irq_nr, &fall_edge_irq_type);
|
|
break;
|
|
case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1SET);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0SET);
|
|
set_irq_chip(irq_nr, &either_edge_irq_type);
|
|
break;
|
|
case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2SET);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0SET);
|
|
set_irq_chip(irq_nr, &level_irq_type);
|
|
break;
|
|
case INTC_INT_LOW_LEVEL: /* 1:1:0 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2SET);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1SET);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
|
|
set_irq_chip(irq_nr, &level_irq_type);
|
|
break;
|
|
case INTC_INT_DISABLED: /* 0:0:0 */
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
|
|
break;
|
|
default: /* disable the interrupt */
|
|
printk("unexpected int type %d (irq %d)\n", type, irq_nr);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
|
|
au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
|
|
return;
|
|
}
|
|
if (int_req) /* assign to interrupt request 1 */
|
|
au_writel(1<<(irq_nr-32), IC1_ASSIGNCLR);
|
|
else /* assign to interrupt request 0 */
|
|
au_writel(1<<(irq_nr-32), IC1_ASSIGNSET);
|
|
au_writel(1<<(irq_nr-32), IC1_SRCSET);
|
|
au_writel(1<<(irq_nr-32), IC1_MASKCLR);
|
|
au_writel(1<<(irq_nr-32), IC1_WAKECLR);
|
|
}
|
|
else {
|
|
switch (type) {
|
|
case INTC_INT_RISE_EDGE: /* 0:0:1 */
|
|
au_writel(1<<irq_nr, IC0_CFG2CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG1CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG0SET);
|
|
set_irq_chip(irq_nr, &rise_edge_irq_type);
|
|
break;
|
|
case INTC_INT_FALL_EDGE: /* 0:1:0 */
|
|
au_writel(1<<irq_nr, IC0_CFG2CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG1SET);
|
|
au_writel(1<<irq_nr, IC0_CFG0CLR);
|
|
set_irq_chip(irq_nr, &fall_edge_irq_type);
|
|
break;
|
|
case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
|
|
au_writel(1<<irq_nr, IC0_CFG2CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG1SET);
|
|
au_writel(1<<irq_nr, IC0_CFG0SET);
|
|
set_irq_chip(irq_nr, &either_edge_irq_type);
|
|
break;
|
|
case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
|
|
au_writel(1<<irq_nr, IC0_CFG2SET);
|
|
au_writel(1<<irq_nr, IC0_CFG1CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG0SET);
|
|
set_irq_chip(irq_nr, &level_irq_type);
|
|
break;
|
|
case INTC_INT_LOW_LEVEL: /* 1:1:0 */
|
|
au_writel(1<<irq_nr, IC0_CFG2SET);
|
|
au_writel(1<<irq_nr, IC0_CFG1SET);
|
|
au_writel(1<<irq_nr, IC0_CFG0CLR);
|
|
set_irq_chip(irq_nr, &level_irq_type);
|
|
break;
|
|
case INTC_INT_DISABLED: /* 0:0:0 */
|
|
au_writel(1<<irq_nr, IC0_CFG0CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG1CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG2CLR);
|
|
break;
|
|
default: /* disable the interrupt */
|
|
printk("unexpected int type %d (irq %d)\n", type, irq_nr);
|
|
au_writel(1<<irq_nr, IC0_CFG0CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG1CLR);
|
|
au_writel(1<<irq_nr, IC0_CFG2CLR);
|
|
return;
|
|
}
|
|
if (int_req) /* assign to interrupt request 1 */
|
|
au_writel(1<<irq_nr, IC0_ASSIGNCLR);
|
|
else /* assign to interrupt request 0 */
|
|
au_writel(1<<irq_nr, IC0_ASSIGNSET);
|
|
au_writel(1<<irq_nr, IC0_SRCSET);
|
|
au_writel(1<<irq_nr, IC0_MASKCLR);
|
|
au_writel(1<<irq_nr, IC0_WAKECLR);
|
|
}
|
|
au_sync();
|
|
}
|
|
|
|
|
|
void __init arch_init_irq(void)
|
|
{
|
|
int i;
|
|
unsigned long cp0_status;
|
|
au1xxx_irq_map_t *imp;
|
|
extern au1xxx_irq_map_t au1xxx_irq_map[];
|
|
extern au1xxx_irq_map_t au1xxx_ic0_map[];
|
|
extern int au1xxx_nr_irqs;
|
|
extern int au1xxx_ic0_nr_irqs;
|
|
|
|
cp0_status = read_c0_status();
|
|
|
|
/* Initialize interrupt controllers to a safe state.
|
|
*/
|
|
au_writel(0xffffffff, IC0_CFG0CLR);
|
|
au_writel(0xffffffff, IC0_CFG1CLR);
|
|
au_writel(0xffffffff, IC0_CFG2CLR);
|
|
au_writel(0xffffffff, IC0_MASKCLR);
|
|
au_writel(0xffffffff, IC0_ASSIGNSET);
|
|
au_writel(0xffffffff, IC0_WAKECLR);
|
|
au_writel(0xffffffff, IC0_SRCSET);
|
|
au_writel(0xffffffff, IC0_FALLINGCLR);
|
|
au_writel(0xffffffff, IC0_RISINGCLR);
|
|
au_writel(0x00000000, IC0_TESTBIT);
|
|
|
|
au_writel(0xffffffff, IC1_CFG0CLR);
|
|
au_writel(0xffffffff, IC1_CFG1CLR);
|
|
au_writel(0xffffffff, IC1_CFG2CLR);
|
|
au_writel(0xffffffff, IC1_MASKCLR);
|
|
au_writel(0xffffffff, IC1_ASSIGNSET);
|
|
au_writel(0xffffffff, IC1_WAKECLR);
|
|
au_writel(0xffffffff, IC1_SRCSET);
|
|
au_writel(0xffffffff, IC1_FALLINGCLR);
|
|
au_writel(0xffffffff, IC1_RISINGCLR);
|
|
au_writel(0x00000000, IC1_TESTBIT);
|
|
|
|
/* Initialize IC0, which is fixed per processor.
|
|
*/
|
|
imp = au1xxx_ic0_map;
|
|
for (i=0; i<au1xxx_ic0_nr_irqs; i++) {
|
|
setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
|
|
imp++;
|
|
}
|
|
|
|
/* Now set up the irq mapping for the board.
|
|
*/
|
|
imp = au1xxx_irq_map;
|
|
for (i=0; i<au1xxx_nr_irqs; i++) {
|
|
setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
|
|
imp++;
|
|
}
|
|
|
|
set_c0_status(ALLINTS);
|
|
|
|
/* Board specific IRQ initialization.
|
|
*/
|
|
if (board_init_irq)
|
|
(*board_init_irq)();
|
|
}
|
|
|
|
|
|
/*
|
|
* Interrupts are nested. Even if an interrupt handler is registered
|
|
* as "fast", we might get another interrupt before we return from
|
|
* intcX_reqX_irqdispatch().
|
|
*/
|
|
|
|
static void intc0_req0_irqdispatch(void)
|
|
{
|
|
int irq = 0;
|
|
static unsigned long intc0_req0 = 0;
|
|
|
|
intc0_req0 |= au_readl(IC0_REQ0INT);
|
|
|
|
if (!intc0_req0)
|
|
return;
|
|
#ifdef AU1000_USB_DEV_REQ_INT
|
|
/*
|
|
* Because of the tight timing of SETUP token to reply
|
|
* transactions, the USB devices-side packet complete
|
|
* interrupt needs the highest priority.
|
|
*/
|
|
if ((intc0_req0 & (1<<AU1000_USB_DEV_REQ_INT))) {
|
|
intc0_req0 &= ~(1<<AU1000_USB_DEV_REQ_INT);
|
|
do_IRQ(AU1000_USB_DEV_REQ_INT);
|
|
return;
|
|
}
|
|
#endif
|
|
irq = au_ffs(intc0_req0) - 1;
|
|
intc0_req0 &= ~(1<<irq);
|
|
do_IRQ(irq);
|
|
}
|
|
|
|
|
|
static void intc0_req1_irqdispatch(void)
|
|
{
|
|
int irq = 0;
|
|
static unsigned long intc0_req1 = 0;
|
|
|
|
intc0_req1 |= au_readl(IC0_REQ1INT);
|
|
|
|
if (!intc0_req1)
|
|
return;
|
|
|
|
irq = au_ffs(intc0_req1) - 1;
|
|
intc0_req1 &= ~(1<<irq);
|
|
do_IRQ(irq);
|
|
}
|
|
|
|
|
|
/*
|
|
* Interrupt Controller 1:
|
|
* interrupts 32 - 63
|
|
*/
|
|
static void intc1_req0_irqdispatch(void)
|
|
{
|
|
int irq = 0;
|
|
static unsigned long intc1_req0 = 0;
|
|
|
|
intc1_req0 |= au_readl(IC1_REQ0INT);
|
|
|
|
if (!intc1_req0)
|
|
return;
|
|
|
|
irq = au_ffs(intc1_req0) - 1;
|
|
intc1_req0 &= ~(1<<irq);
|
|
irq += 32;
|
|
do_IRQ(irq);
|
|
}
|
|
|
|
|
|
static void intc1_req1_irqdispatch(void)
|
|
{
|
|
int irq = 0;
|
|
static unsigned long intc1_req1 = 0;
|
|
|
|
intc1_req1 |= au_readl(IC1_REQ1INT);
|
|
|
|
if (!intc1_req1)
|
|
return;
|
|
|
|
irq = au_ffs(intc1_req1) - 1;
|
|
intc1_req1 &= ~(1<<irq);
|
|
irq += 32;
|
|
do_IRQ(irq);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/* Save/restore the interrupt controller state.
|
|
* Called from the save/restore core registers as part of the
|
|
* au_sleep function in power.c.....maybe I should just pm_register()
|
|
* them instead?
|
|
*/
|
|
static unsigned int sleep_intctl_config0[2];
|
|
static unsigned int sleep_intctl_config1[2];
|
|
static unsigned int sleep_intctl_config2[2];
|
|
static unsigned int sleep_intctl_src[2];
|
|
static unsigned int sleep_intctl_assign[2];
|
|
static unsigned int sleep_intctl_wake[2];
|
|
static unsigned int sleep_intctl_mask[2];
|
|
|
|
void
|
|
save_au1xxx_intctl(void)
|
|
{
|
|
sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
|
|
sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
|
|
sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
|
|
sleep_intctl_src[0] = au_readl(IC0_SRCRD);
|
|
sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
|
|
sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
|
|
sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
|
|
|
|
sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
|
|
sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
|
|
sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
|
|
sleep_intctl_src[1] = au_readl(IC1_SRCRD);
|
|
sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
|
|
sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
|
|
sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
|
|
}
|
|
|
|
/* For most restore operations, we clear the entire register and
|
|
* then set the bits we found during the save.
|
|
*/
|
|
void
|
|
restore_au1xxx_intctl(void)
|
|
{
|
|
au_writel(0xffffffff, IC0_MASKCLR); au_sync();
|
|
|
|
au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
|
|
au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
|
|
au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
|
|
au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
|
|
au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
|
|
au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
|
|
au_writel(0xffffffff, IC0_SRCCLR); au_sync();
|
|
au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
|
|
au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
|
|
au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
|
|
au_writel(0xffffffff, IC0_WAKECLR); au_sync();
|
|
au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
|
|
au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
|
|
au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
|
|
au_writel(0x00000000, IC0_TESTBIT); au_sync();
|
|
|
|
au_writel(0xffffffff, IC1_MASKCLR); au_sync();
|
|
|
|
au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
|
|
au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
|
|
au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
|
|
au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
|
|
au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
|
|
au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
|
|
au_writel(0xffffffff, IC1_SRCCLR); au_sync();
|
|
au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
|
|
au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
|
|
au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
|
|
au_writel(0xffffffff, IC1_WAKECLR); au_sync();
|
|
au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
|
|
au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
|
|
au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
|
|
au_writel(0x00000000, IC1_TESTBIT); au_sync();
|
|
|
|
au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
|
|
|
|
au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
asmlinkage void plat_irq_dispatch(void)
|
|
{
|
|
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
|
|
|
|
if (pending & CAUSEF_IP7)
|
|
mips_timer_interrupt();
|
|
else if (pending & CAUSEF_IP2)
|
|
intc0_req0_irqdispatch();
|
|
else if (pending & CAUSEF_IP3)
|
|
intc0_req1_irqdispatch();
|
|
else if (pending & CAUSEF_IP4)
|
|
intc1_req0_irqdispatch();
|
|
else if (pending & CAUSEF_IP5)
|
|
intc1_req1_irqdispatch();
|
|
else
|
|
spurious_interrupt();
|
|
}
|