mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-13 06:43:29 +08:00
c641010452
mask_irq(), unmask_irq() and specific_eoi() are provided by the i8259 PIC driver and should be wrapped with CONFIG_I8259_PIC. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Hannes Schmelzer <oe5hpm@oevsv.at>
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2009
|
|
* Graeme Russ, <graeme.russ@gmail.com>
|
|
*
|
|
* (C) Copyright 2007
|
|
* Daniel Hellstrom, Gaisler Research, <daniel@gaisler.com>
|
|
*
|
|
* (C) Copyright 2006
|
|
* Detlev Zundel, DENX Software Engineering, <dzu@denx.de>
|
|
*
|
|
* (C) Copyright -2003
|
|
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
|
|
*
|
|
* (C) Copyright 2001
|
|
* Josh Huber, Mission Critical Linux, Inc, <huber@mclx.com>
|
|
*/
|
|
|
|
/*
|
|
* This file contains the high-level API for the interrupt sub-system
|
|
* of the x86 port of U-Boot. Most of the functionality has been
|
|
* shamelessly stolen from the leon2 / leon3 ports of U-Boot.
|
|
* Daniel Hellstrom, Detlev Zundel, Wolfgang Denk and Josh Huber are
|
|
* credited for the corresponding work on those ports. The original
|
|
* interrupt handling routines for the x86 port were written by
|
|
* Daniel Engström
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/interrupt.h>
|
|
|
|
#if !CONFIG_IS_ENABLED(X86_64)
|
|
|
|
struct irq_action {
|
|
interrupt_handler_t *handler;
|
|
void *arg;
|
|
unsigned int count;
|
|
};
|
|
|
|
static struct irq_action irq_handlers[SYS_NUM_IRQS] = { {0} };
|
|
static int spurious_irq_cnt;
|
|
static int spurious_irq;
|
|
|
|
void irq_install_handler(int irq, interrupt_handler_t *handler, void *arg)
|
|
{
|
|
int status;
|
|
|
|
if (irq < 0 || irq >= SYS_NUM_IRQS) {
|
|
printf("irq_install_handler: bad irq number %d\n", irq);
|
|
return;
|
|
}
|
|
|
|
if (irq_handlers[irq].handler != NULL)
|
|
printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
|
|
(ulong) handler,
|
|
(ulong) irq_handlers[irq].handler);
|
|
|
|
status = disable_interrupts();
|
|
|
|
irq_handlers[irq].handler = handler;
|
|
irq_handlers[irq].arg = arg;
|
|
irq_handlers[irq].count = 0;
|
|
|
|
if (CONFIG_IS_ENABLED(I8259_PIC))
|
|
unmask_irq(irq);
|
|
|
|
if (status)
|
|
enable_interrupts();
|
|
|
|
return;
|
|
}
|
|
|
|
void irq_free_handler(int irq)
|
|
{
|
|
int status;
|
|
|
|
if (irq < 0 || irq >= SYS_NUM_IRQS) {
|
|
printf("irq_free_handler: bad irq number %d\n", irq);
|
|
return;
|
|
}
|
|
|
|
status = disable_interrupts();
|
|
|
|
if (CONFIG_IS_ENABLED(I8259_PIC))
|
|
mask_irq(irq);
|
|
|
|
irq_handlers[irq].handler = NULL;
|
|
irq_handlers[irq].arg = NULL;
|
|
|
|
if (status)
|
|
enable_interrupts();
|
|
|
|
return;
|
|
}
|
|
|
|
void do_irq(int hw_irq)
|
|
{
|
|
int irq = hw_irq - 0x20;
|
|
|
|
if (irq < 0 || irq >= SYS_NUM_IRQS) {
|
|
printf("do_irq: bad irq number %d\n", irq);
|
|
return;
|
|
}
|
|
|
|
if (irq_handlers[irq].handler) {
|
|
if (CONFIG_IS_ENABLED(I8259_PIC))
|
|
mask_irq(irq);
|
|
|
|
irq_handlers[irq].handler(irq_handlers[irq].arg);
|
|
irq_handlers[irq].count++;
|
|
|
|
if (CONFIG_IS_ENABLED(I8259_PIC)) {
|
|
unmask_irq(irq);
|
|
specific_eoi(irq);
|
|
}
|
|
} else {
|
|
if ((irq & 7) != 7) {
|
|
spurious_irq_cnt++;
|
|
spurious_irq = irq;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMD_IRQ)
|
|
int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
#if !CONFIG_IS_ENABLED(X86_64)
|
|
int irq;
|
|
|
|
printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
|
|
spurious_irq_cnt, spurious_irq);
|
|
|
|
printf("Interrupt-Information:\n");
|
|
printf("Nr Routine Arg Count\n");
|
|
|
|
for (irq = 0; irq < SYS_NUM_IRQS; irq++) {
|
|
if (irq_handlers[irq].handler != NULL) {
|
|
printf("%02d %08lx %08lx %d\n",
|
|
irq,
|
|
(ulong)irq_handlers[irq].handler,
|
|
(ulong)irq_handlers[irq].arg,
|
|
irq_handlers[irq].count);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
#endif
|