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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | // 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> * * Copyright (C) 2019 Sean Anderson <seanga2@gmail.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 show_regs(struct pt_regs *regs) { #ifdef CONFIG_SHOW_REGS printf("RA: " REG_FMT " SP: " REG_FMT " GP: " REG_FMT "\n", regs->ra, regs->sp, regs->gp); printf("TP: " REG_FMT " T0: " REG_FMT " T1: " REG_FMT "\n", regs->tp, regs->t0, regs->t1); printf("T2: " REG_FMT " S0: " REG_FMT " S1: " REG_FMT "\n", regs->t2, regs->s0, regs->s1); printf("A0: " REG_FMT " A1: " REG_FMT " A2: " REG_FMT "\n", regs->a0, regs->a1, regs->a2); printf("A3: " REG_FMT " A4: " REG_FMT " A5: " REG_FMT "\n", regs->a3, regs->a4, regs->a5); printf("A6: " REG_FMT " A7: " REG_FMT " S2: " REG_FMT "\n", regs->a6, regs->a7, regs->s2); printf("S3: " REG_FMT " S4: " REG_FMT " S5: " REG_FMT "\n", regs->s3, regs->s4, regs->s5); printf("S6: " REG_FMT " S7: " REG_FMT " S8: " REG_FMT "\n", regs->s6, regs->s7, regs->s8); printf("S9: " REG_FMT " S10: " REG_FMT " S11: " REG_FMT "\n", regs->s9, regs->s10, regs->s11); printf("T3: " REG_FMT " T4: " REG_FMT " T5: " REG_FMT "\n", regs->t3, regs->t4, regs->t5); printf("T6: " REG_FMT "\n", regs->t6); #endif } static void _exit_trap(ulong code, ulong epc, ulong tval, 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("Unhandled exception: %s\n", exception_code[code]); else printf("Unhandled exception code: %ld\n", code); printf("EPC: " REG_FMT " TVAL: " REG_FMT "\n", epc, tval); show_regs(regs); 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, ulong tval, 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, tval, regs); break; }; } else { _exit_trap(cause, epc, tval, 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) { } |