mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
|
|
* (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)
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 <common.h>
|
|
#include <watchdog.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/immap.h>
|
|
|
|
#define NR_IRQS (CFG_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);
|
|
}
|
|
}
|