mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +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>
105 lines
2 KiB
C
105 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2016-17 Microsemi Corporation.
|
|
* Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com>
|
|
*
|
|
* Copyright (C) 2017 Andes Technology Corporation
|
|
* Rick Chen, Andes Technology Corporation <rick@andestech.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <irq_func.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/system.h>
|
|
#include <asm/encoding.h>
|
|
|
|
static void _exit_trap(ulong code, ulong epc, struct pt_regs *regs)
|
|
{
|
|
static const char * const exception_code[] = {
|
|
"Instruction address misaligned",
|
|
"Instruction access fault",
|
|
"Illegal instruction",
|
|
"Breakpoint",
|
|
"Load address misaligned",
|
|
"Load access fault",
|
|
"Store/AMO address misaligned",
|
|
"Store/AMO access fault",
|
|
"Environment call from U-mode",
|
|
"Environment call from S-mode",
|
|
"Reserved",
|
|
"Environment call from M-mode",
|
|
"Instruction page fault",
|
|
"Load page fault",
|
|
"Reserved",
|
|
"Store/AMO page fault",
|
|
};
|
|
|
|
if (code < ARRAY_SIZE(exception_code)) {
|
|
printf("exception code: %ld , %s , epc %lx , ra %lx\n",
|
|
code, exception_code[code], epc, regs->ra);
|
|
} else {
|
|
printf("reserved exception code: %ld , epc %lx , ra %lx\n",
|
|
code, epc, regs->ra);
|
|
}
|
|
|
|
hang();
|
|
}
|
|
|
|
int interrupt_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* enable interrupts
|
|
*/
|
|
void enable_interrupts(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* disable interrupts
|
|
*/
|
|
int disable_interrupts(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ulong handle_trap(ulong cause, ulong epc, struct pt_regs *regs)
|
|
{
|
|
ulong is_irq, irq;
|
|
|
|
is_irq = (cause & MCAUSE_INT);
|
|
irq = (cause & ~MCAUSE_INT);
|
|
|
|
if (is_irq) {
|
|
switch (irq) {
|
|
case IRQ_M_EXT:
|
|
case IRQ_S_EXT:
|
|
external_interrupt(0); /* handle external interrupt */
|
|
break;
|
|
case IRQ_M_TIMER:
|
|
case IRQ_S_TIMER:
|
|
timer_interrupt(0); /* handle timer interrupt */
|
|
break;
|
|
default:
|
|
_exit_trap(cause, epc, regs);
|
|
break;
|
|
};
|
|
} else {
|
|
_exit_trap(cause, epc, regs);
|
|
}
|
|
|
|
return epc;
|
|
}
|
|
|
|
/*
|
|
*Entry Point for PLIC Interrupt Handler
|
|
*/
|
|
__attribute__((weak)) void external_interrupt(struct pt_regs *regs)
|
|
{
|
|
}
|
|
|
|
__attribute__((weak)) void timer_interrupt(struct pt_regs *regs)
|
|
{
|
|
}
|