2 * Copyright (c) 2016-17 Microsemi Corporation.
3 * Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com>
5 * Copyright (C) 2017 Andes Technology Corporation
6 * Rick Chen, Andes Technology Corporation <rick@andestech.com>
8 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/ptrace.h>
13 #include <asm/system.h>
14 #include <asm/encoding.h>
16 static void _exit_trap(int code, uint epc, struct pt_regs *regs);
18 int interrupt_init(void)
26 void enable_interrupts(void)
33 int disable_interrupts(void)
38 uint handle_trap(uint mcause, uint epc, struct pt_regs *regs)
42 is_int = (mcause & MCAUSE_INT);
43 if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT))
44 external_interrupt(0); /* handle_m_ext_interrupt */
45 else if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER))
46 timer_interrupt(0); /* handle_m_timer_interrupt */
48 _exit_trap(mcause, epc, regs);
54 *Entry Point for PLIC Interrupt Handler
56 __attribute__((weak)) void external_interrupt(struct pt_regs *regs)
60 __attribute__((weak)) void timer_interrupt(struct pt_regs *regs)
64 static void _exit_trap(int code, uint epc, struct pt_regs *regs)
66 static const char *exception_code[] = {
67 "Instruction address misaligned",
68 "Instruction access fault",
69 "Illegal instruction",
71 "Load address misaligned"
74 printf("exception code: %d , %s , epc %08x , ra %08lx\n",
75 code, exception_code[code], epc, regs->ra);