mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 12:33:41 +00:00
c30b7adbca
These functions do not use driver model but are fairly widely used in U-Boot. But it is not clear that they will use driver model anytime soon, so we don't want to label them as 'legacy'. Move them to a new irq_func.h header file. Avoid the name 'irq.h' since it is widely used in U-Boot already. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
99 lines
1.8 KiB
C
99 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000-2004
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* (C) Copyright 2007 Freescale Semiconductor Inc
|
|
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <irq_func.h>
|
|
#include <watchdog.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/immap.h>
|
|
|
|
#define NR_IRQS (CONFIG_SYS_NUM_IRQS)
|
|
|
|
/*
|
|
* Interrupt vector functions.
|
|
*/
|
|
struct interrupt_action {
|
|
interrupt_handler_t *handler;
|
|
void *arg;
|
|
};
|
|
|
|
static struct interrupt_action irq_vecs[NR_IRQS];
|
|
|
|
static __inline__ unsigned short get_sr (void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
asm volatile ("move.w %%sr,%0":"=r" (sr):);
|
|
|
|
return sr;
|
|
}
|
|
|
|
static __inline__ void set_sr (unsigned short sr)
|
|
{
|
|
asm volatile ("move.w %0,%%sr"::"r" (sr));
|
|
}
|
|
|
|
/************************************************************************/
|
|
/*
|
|
* Install and free an interrupt handler
|
|
*/
|
|
void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
|
|
{
|
|
if ((vec < 0) || (vec >= NR_IRQS)) {
|
|
printf ("irq_install_handler: wrong interrupt vector %d\n",
|
|
vec);
|
|
return;
|
|
}
|
|
|
|
irq_vecs[vec].handler = handler;
|
|
irq_vecs[vec].arg = arg;
|
|
}
|
|
|
|
void irq_free_handler(int vec)
|
|
{
|
|
if ((vec < 0) || (vec >= NR_IRQS)) {
|
|
return;
|
|
}
|
|
|
|
irq_vecs[vec].handler = NULL;
|
|
irq_vecs[vec].arg = NULL;
|
|
}
|
|
|
|
void enable_interrupts(void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
sr = get_sr ();
|
|
set_sr (sr & ~0x0700);
|
|
}
|
|
|
|
int disable_interrupts(void)
|
|
{
|
|
unsigned short sr;
|
|
|
|
sr = get_sr ();
|
|
set_sr (sr | 0x0700);
|
|
|
|
return ((sr & 0x0700) == 0); /* return true, if interrupts were enabled before */
|
|
}
|
|
|
|
void int_handler (struct pt_regs *fp)
|
|
{
|
|
int vec;
|
|
|
|
vec = (fp->vector >> 2) & 0xff;
|
|
if (vec > 0x40)
|
|
vec -= 0x40;
|
|
|
|
if (irq_vecs[vec].handler != NULL) {
|
|
irq_vecs[vec].handler (irq_vecs[vec].arg);
|
|
} else {
|
|
printf ("\nBogus External Interrupt Vector %d\n", vec);
|
|
}
|
|
}
|