| /* |
| * Copyright (c) 2014 Wind River Systems, Inc. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file |
| * @brief Common fault handler for ARCv2 |
| * |
| * Common fault handler for ARCv2 processors. |
| */ |
| |
| #include <toolchain.h> |
| #include <linker/sections.h> |
| #include <inttypes.h> |
| |
| #include <kernel.h> |
| #include <kernel_structs.h> |
| #include <misc/printk.h> |
| #include <exc_handle.h> |
| #include <logging/log_ctrl.h> |
| |
| #ifdef CONFIG_USERSPACE |
| Z_EXC_DECLARE(z_arch_user_string_nlen); |
| |
| static const struct z_exc_handle exceptions[] = { |
| Z_EXC_HANDLE(z_arch_user_string_nlen) |
| }; |
| #endif |
| |
| /* |
| * @brief Fault handler |
| * |
| * This routine is called when fatal error conditions are detected by hardware |
| * and is responsible only for reporting the error. Once reported, it then |
| * invokes the user provided routine z_SysFatalErrorHandler() which is |
| * responsible for implementing the error handling policy. |
| */ |
| void _Fault(NANO_ESF *esf) |
| { |
| u32_t vector, code, parameter; |
| u32_t exc_addr = z_arc_v2_aux_reg_read(_ARC_V2_EFA); |
| u32_t ecr = z_arc_v2_aux_reg_read(_ARC_V2_ECR); |
| |
| LOG_PANIC(); |
| |
| #ifdef CONFIG_USERSPACE |
| for (int i = 0; i < ARRAY_SIZE(exceptions); i++) { |
| u32_t start = (u32_t)exceptions[i].start; |
| u32_t end = (u32_t)exceptions[i].end; |
| |
| if (esf->pc >= start && esf->pc < end) { |
| esf->pc = (u32_t)(exceptions[i].fixup); |
| return; |
| } |
| } |
| #endif |
| |
| vector = _ARC_V2_ECR_VECTOR(ecr); |
| code = _ARC_V2_ECR_CODE(ecr); |
| parameter = _ARC_V2_ECR_PARAMETER(ecr); |
| |
| |
| /* exception raised by kernel */ |
| if (vector == 0x9 && parameter == _TRAP_S_CALL_RUNTIME_EXCEPT) { |
| z_NanoFatalErrorHandler(esf->r0, esf); |
| return; |
| } |
| |
| printk("Exception vector: 0x%x, cause code: 0x%x, parameter 0x%x\n", |
| vector, code, parameter); |
| printk("Address 0x%x\n", exc_addr); |
| #ifdef CONFIG_ARC_STACK_CHECKING |
| /* Vector 6 = EV_ProV. Regardless of code, parameter 2 means stack |
| * check violation |
| * stack check and mpu violation can come out together, then |
| * parameter = 0x2 | [0x4 | 0x8 | 0x1] |
| */ |
| if (vector == 6U && parameter & 0x2) { |
| z_NanoFatalErrorHandler(_NANO_ERR_STACK_CHK_FAIL, esf); |
| return; |
| } |
| #endif |
| z_NanoFatalErrorHandler(_NANO_ERR_HW_EXCEPTION, esf); |
| } |