mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 03:08:31 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
108 lines
2.2 KiB
C
108 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
|
|
* (C) Copyright 2011, Julius Baxter <julius@opencores.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/types.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/system.h>
|
|
#include <asm/openrisc_exc.h>
|
|
|
|
struct irq_action {
|
|
interrupt_handler_t *handler;
|
|
void *arg;
|
|
int count;
|
|
};
|
|
|
|
static struct irq_action handlers[32];
|
|
|
|
void interrupt_handler(void)
|
|
{
|
|
int irq;
|
|
|
|
while ((irq = ffs(mfspr(SPR_PICSR)))) {
|
|
if (handlers[--irq].handler) {
|
|
handlers[irq].handler(handlers[irq].arg);
|
|
handlers[irq].count++;
|
|
} else {
|
|
/* disable the interrupt */
|
|
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1 << irq));
|
|
printf("Unhandled interrupt: %d\n", irq);
|
|
}
|
|
/* clear the interrupt */
|
|
mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1 << irq));
|
|
}
|
|
}
|
|
|
|
int interrupt_init(void)
|
|
{
|
|
/* install handler for external interrupt exception */
|
|
exception_install_handler(EXC_EXT_IRQ, interrupt_handler);
|
|
/* Enable interrupts in supervisor register */
|
|
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_IEE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void enable_interrupts(void)
|
|
{
|
|
/* Set interrupt enable bit in supervisor register */
|
|
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_IEE);
|
|
/* Enable timer exception */
|
|
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_TEE);
|
|
}
|
|
|
|
int disable_interrupts(void)
|
|
{
|
|
/* Clear interrupt enable bit in supervisor register */
|
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_IEE);
|
|
/* Disable timer exception */
|
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_TEE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void irq_install_handler(int irq, interrupt_handler_t *handler, void *arg)
|
|
{
|
|
if (irq < 0 || irq > 31)
|
|
return;
|
|
|
|
handlers[irq].handler = handler;
|
|
handlers[irq].arg = arg;
|
|
}
|
|
|
|
void irq_free_handler(int irq)
|
|
{
|
|
if (irq < 0 || irq > 31)
|
|
return;
|
|
|
|
handlers[irq].handler = 0;
|
|
handlers[irq].arg = 0;
|
|
}
|
|
|
|
#if defined(CONFIG_CMD_IRQ)
|
|
int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
int i;
|
|
|
|
printf("\nInterrupt-Information:\n\n");
|
|
printf("Nr Routine Arg Count\n");
|
|
printf("-----------------------------\n");
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
if (handlers[i].handler) {
|
|
printf("%02d %08lx %08lx %d\n",
|
|
i,
|
|
(ulong)handlers[i].handler,
|
|
(ulong)handlers[i].arg,
|
|
handlers[i].count);
|
|
}
|
|
}
|
|
printf("\n");
|
|
|
|
return 0;
|
|
}
|
|
#endif
|