160 lines
3.2 KiB
C
160 lines
3.2 KiB
C
/*
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* Copyright (c) 2016 Cadence Design Systems, Inc.
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/arch/cpu.h>
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#include <zephyr/kernel_structs.h>
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#include <inttypes.h>
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#include <xtensa/config/specreg.h>
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#include <xtensa_backtrace.h>
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#include <zephyr/arch/common/exc_handle.h>
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#include <xtensa_internal.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
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#ifdef XT_SIMULATOR
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#include <xtensa/simcall.h>
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#endif
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char *xtensa_exccause(unsigned int cause_code)
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{
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#if defined(CONFIG_PRINTK) || defined(CONFIG_LOG)
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switch (cause_code) {
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case 0:
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return "illegal instruction";
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case 1:
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return "syscall";
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case 2:
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return "instr fetch error";
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case 3:
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return "load/store error";
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case 4:
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return "level-1 interrupt";
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case 5:
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return "alloca";
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case 6:
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return "divide by zero";
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case 8:
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return "privileged";
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case 9:
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return "load/store alignment";
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case 12:
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return "instr PIF data error";
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case 13:
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return "load/store PIF data error";
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case 14:
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return "instr PIF addr error";
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case 15:
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return "load/store PIF addr error";
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case 16:
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return "instr TLB miss";
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case 17:
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return "instr TLB multi hit";
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case 18:
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return "instr fetch privilege";
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case 20:
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return "inst fetch prohibited";
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case 24:
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return "load/store TLB miss";
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case 25:
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return "load/store TLB multi hit";
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case 26:
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return "load/store privilege";
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case 28:
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return "load prohibited";
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case 29:
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return "store prohibited";
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case 32: case 33: case 34: case 35: case 36: case 37: case 38: case 39:
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return "coprocessor disabled";
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case 63:
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/* i.e. z_except_reason */
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return "zephyr exception";
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case 64:
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return "kernel oops";
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default:
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return "unknown/reserved";
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}
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#else
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ARG_UNUSED(cause_code);
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return "na";
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#endif
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}
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void xtensa_fatal_error(unsigned int reason, const z_arch_esf_t *esf)
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{
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#ifdef CONFIG_EXCEPTION_DEBUG
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if (esf) {
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/* Don't want to get elbowed by xtensa_switch
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* in between printing registers and dumping them;
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* corrupts backtrace
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*/
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unsigned int key = arch_irq_lock();
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xtensa_dump_stack(esf);
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#if defined(CONFIG_XTENSA_ENABLE_BACKTRACE)
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#if XCHAL_HAVE_WINDOWED
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xtensa_backtrace_print(100, (int *)esf);
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#endif
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#endif
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arch_irq_unlock(key);
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}
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#endif /* CONFIG_EXCEPTION_DEBUG */
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z_fatal_error(reason, esf);
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}
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#ifdef XT_SIMULATOR
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void exit(int return_code)
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{
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__asm__ (
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"mov a3, %[code]\n\t"
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"movi a2, %[call]\n\t"
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"simcall\n\t"
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:
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: [code] "r" (return_code), [call] "i" (SYS_exit)
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: "a3", "a2");
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}
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#endif
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#ifdef XT_SIMULATOR
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FUNC_NORETURN void z_system_halt(unsigned int reason)
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{
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exit(255 - reason);
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CODE_UNREACHABLE;
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}
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#endif
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FUNC_NORETURN void arch_syscall_oops(void *ssf)
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{
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xtensa_arch_kernel_oops(K_ERR_KERNEL_OOPS, ssf);
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CODE_UNREACHABLE;
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}
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#ifdef CONFIG_USERSPACE
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void z_impl_xtensa_user_fault(unsigned int reason)
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{
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if ((_current->base.user_options & K_USER) != 0) {
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if ((reason != K_ERR_KERNEL_OOPS) &&
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(reason != K_ERR_STACK_CHK_FAIL)) {
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reason = K_ERR_KERNEL_OOPS;
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}
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}
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xtensa_arch_except(reason);
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}
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static void z_vrfy_xtensa_user_fault(unsigned int reason)
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{
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z_impl_xtensa_user_fault(reason);
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}
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#include <syscalls/xtensa_user_fault_mrsh.c>
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#endif /* CONFIG_USERSPACE */
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