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- // 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 <hang.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)
- {
- }
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