| /* |
| * 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> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/ptrace.h> |
| #include <asm/system.h> |
| #include <asm/encoding.h> |
| |
| static void _exit_trap(int code, uint epc, struct pt_regs *regs); |
| |
| int interrupt_init(void) |
| { |
| return 0; |
| } |
| |
| /* |
| * enable interrupts |
| */ |
| void enable_interrupts(void) |
| { |
| } |
| |
| /* |
| * disable interrupts |
| */ |
| int disable_interrupts(void) |
| { |
| return 0; |
| } |
| |
| uint handle_trap(uint mcause, uint epc, struct pt_regs *regs) |
| { |
| uint is_int; |
| |
| is_int = (mcause & MCAUSE_INT); |
| if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) |
| external_interrupt(0); /* handle_m_ext_interrupt */ |
| else if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)) |
| timer_interrupt(0); /* handle_m_timer_interrupt */ |
| else |
| _exit_trap(mcause, 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) |
| { |
| } |
| |
| static void _exit_trap(int code, uint epc, struct pt_regs *regs) |
| { |
| static const char * const exception_code[] = { |
| "Instruction address misaligned", |
| "Instruction access fault", |
| "Illegal instruction", |
| "Breakpoint", |
| "Load address misaligned" |
| }; |
| |
| printf("exception code: %d , %s , epc %08x , ra %08lx\n", |
| code, exception_code[code], epc, regs->ra); |
| } |