mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +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>
144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000-2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
|
|
* Scott McNutt <smcnutt@psyent.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <irq_func.h>
|
|
#include <asm/nios2.h>
|
|
#include <asm/types.h>
|
|
#include <asm/io.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
/*************************************************************************/
|
|
struct irq_action {
|
|
interrupt_handler_t *handler;
|
|
void *arg;
|
|
int count;
|
|
};
|
|
|
|
static struct irq_action vecs[32];
|
|
|
|
int disable_interrupts(void)
|
|
{
|
|
int val = rdctl (CTL_STATUS);
|
|
wrctl (CTL_STATUS, val & ~STATUS_IE);
|
|
return (val & STATUS_IE);
|
|
}
|
|
|
|
void enable_interrupts( void )
|
|
{
|
|
int val = rdctl (CTL_STATUS);
|
|
wrctl (CTL_STATUS, val | STATUS_IE);
|
|
}
|
|
|
|
void external_interrupt(struct pt_regs *regs)
|
|
{
|
|
unsigned irqs;
|
|
struct irq_action *act;
|
|
|
|
/* Evaluate only irqs that are both enabled AND pending */
|
|
irqs = rdctl (CTL_IENABLE) & rdctl (CTL_IPENDING);
|
|
act = vecs;
|
|
|
|
/* Assume (as does the Nios2 HAL) that bit 0 is highest
|
|
* priority. NOTE: There is ALWAYS a handler assigned
|
|
* (the default if no other).
|
|
*/
|
|
while (irqs) {
|
|
if (irqs & 1) {
|
|
act->handler (act->arg);
|
|
act->count++;
|
|
}
|
|
irqs >>=1;
|
|
act++;
|
|
}
|
|
}
|
|
|
|
static void def_hdlr (void *arg)
|
|
{
|
|
unsigned irqs = rdctl (CTL_IENABLE);
|
|
|
|
/* Disable the individual interrupt -- with gratuitous
|
|
* warning.
|
|
*/
|
|
irqs &= ~(1 << (int)arg);
|
|
wrctl (CTL_IENABLE, irqs);
|
|
printf ("WARNING: Disabling unhandled interrupt: %d\n",
|
|
(int)arg);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
void irq_install_handler(int irq, interrupt_handler_t *hdlr, void *arg)
|
|
{
|
|
|
|
int flag;
|
|
struct irq_action *act;
|
|
unsigned ena = rdctl (CTL_IENABLE);
|
|
|
|
if ((irq < 0) || (irq > 31))
|
|
return;
|
|
act = &vecs[irq];
|
|
|
|
flag = disable_interrupts();
|
|
if (hdlr) {
|
|
act->handler = hdlr;
|
|
act->arg = arg;
|
|
ena |= (1 << irq); /* enable */
|
|
} else {
|
|
act->handler = def_hdlr;
|
|
act->arg = (void *)irq;
|
|
ena &= ~(1 << irq); /* disable */
|
|
}
|
|
wrctl (CTL_IENABLE, ena);
|
|
if (flag) enable_interrupts();
|
|
}
|
|
|
|
|
|
int interrupt_init(void)
|
|
{
|
|
int i;
|
|
|
|
/* Assign the default handler to all */
|
|
for (i = 0; i < 32; i++) {
|
|
vecs[i].handler = def_hdlr;
|
|
vecs[i].arg = (void *)i;
|
|
vecs[i].count = 0;
|
|
}
|
|
|
|
enable_interrupts();
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
#if defined(CONFIG_CMD_IRQ)
|
|
int do_irqinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
int i;
|
|
struct irq_action *act = vecs;
|
|
|
|
printf ("\nInterrupt-Information:\n\n");
|
|
printf ("Nr Routine Arg Count\n");
|
|
printf ("-----------------------------\n");
|
|
|
|
for (i=0; i<32; i++) {
|
|
if (act->handler != def_hdlr) {
|
|
printf ("%02d %08lx %08lx %d\n",
|
|
i,
|
|
(ulong)act->handler,
|
|
(ulong)act->arg,
|
|
act->count);
|
|
}
|
|
act++;
|
|
}
|
|
printf ("\n");
|
|
|
|
return (0);
|
|
}
|
|
#endif
|