1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2016-17 Microsemi Corporation.
4 * Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com>
6 * Copyright (C) 2017 Andes Technology Corporation
7 * Rick Chen, Andes Technology Corporation <rick@andestech.com>
11 #include <asm/ptrace.h>
12 #include <asm/system.h>
13 #include <asm/encoding.h>
15 static void _exit_trap(int code, uint epc, struct pt_regs *regs);
17 int interrupt_init(void)
25 void enable_interrupts(void)
32 int disable_interrupts(void)
37 uint handle_trap(uint mcause, uint epc, struct pt_regs *regs)
41 is_int = (mcause & MCAUSE_INT);
42 if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT))
43 external_interrupt(0); /* handle_m_ext_interrupt */
44 else if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER))
45 timer_interrupt(0); /* handle_m_timer_interrupt */
47 _exit_trap(mcause, epc, regs);
53 *Entry Point for PLIC Interrupt Handler
55 __attribute__((weak)) void external_interrupt(struct pt_regs *regs)
59 __attribute__((weak)) void timer_interrupt(struct pt_regs *regs)
63 static void _exit_trap(int code, uint epc, struct pt_regs *regs)
65 static const char * const exception_code[] = {
66 "Instruction address misaligned",
67 "Instruction access fault",
68 "Illegal instruction",
70 "Load address misaligned"
73 printf("exception code: %d , %s , epc %08x , ra %08lx\n",
74 code, exception_code[code], epc, regs->ra);