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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
// Copyright(c) 2018 Intel Corporation. All rights reserved.
// Author: Pan Xiuli <>
#include <linux/module.h>
#include <sound/sof.h>
#include <sound/sof/xtensa.h>
#include "../sof-priv.h"
struct xtensa_exception_cause {
u32 id;
const char *msg;
const char *description;
* From table 4-64 Exception Causes of Xtensa
* Instruction Set Architecture (ISA) Reference Manual
static const struct xtensa_exception_cause xtensa_exception_causes[] = {
{0, "IllegalInstructionCause", "Illegal instruction"},
{1, "SyscallCause", "SYSCALL instruction"},
{2, "InstructionFetchErrorCause",
"Processor internal physical address or data error during instruction fetch"},
{3, "LoadStoreErrorCause",
"Processor internal physical address or data error during load or store"},
{4, "Level1InterruptCause",
"Level-1 interrupt as indicated by set level-1 bits in the INTERRUPT register"},
{5, "AllocaCause",
"MOVSP instruction, if caller’s registers are not in the register file"},
{6, "IntegerDivideByZeroCause",
"QUOS, QUOU, REMS, or REMU divisor operand is zero"},
{8, "PrivilegedCause",
"Attempt to execute a privileged operation when CRING ? 0"},
{9, "LoadStoreAlignmentCause", "Load or store to an unaligned address"},
{12, "InstrPIFDataErrorCause",
"PIF data error during instruction fetch"},
{13, "LoadStorePIFDataErrorCause",
"Synchronous PIF data error during LoadStore access"},
{14, "InstrPIFAddrErrorCause",
"PIF address error during instruction fetch"},
{15, "LoadStorePIFAddrErrorCause",
"Synchronous PIF address error during LoadStore access"},
{16, "InstTLBMissCause", "Error during Instruction TLB refill"},
{17, "InstTLBMultiHitCause",
"Multiple instruction TLB entries matched"},
{18, "InstFetchPrivilegeCause",
"An instruction fetch referenced a virtual address at a ring level less than CRING"},
{20, "InstFetchProhibitedCause",
"An instruction fetch referenced a page mapped with an attribute that does not permit instruction fetch"},
{24, "LoadStoreTLBMissCause",
"Error during TLB refill for a load or store"},
{25, "LoadStoreTLBMultiHitCause",
"Multiple TLB entries matched for a load or store"},
{26, "LoadStorePrivilegeCause",
"A load or store referenced a virtual address at a ring level less than CRING"},
{28, "LoadProhibitedCause",
"A load referenced a page mapped with an attribute that does not permit loads"},
{32, "Coprocessor0Disabled",
"Coprocessor 0 instruction when cp0 disabled"},
{33, "Coprocessor1Disabled",
"Coprocessor 1 instruction when cp1 disabled"},
{34, "Coprocessor2Disabled",
"Coprocessor 2 instruction when cp2 disabled"},
{35, "Coprocessor3Disabled",
"Coprocessor 3 instruction when cp3 disabled"},
{36, "Coprocessor4Disabled",
"Coprocessor 4 instruction when cp4 disabled"},
{37, "Coprocessor5Disabled",
"Coprocessor 5 instruction when cp5 disabled"},
{38, "Coprocessor6Disabled",
"Coprocessor 6 instruction when cp6 disabled"},
{39, "Coprocessor7Disabled",
"Coprocessor 7 instruction when cp7 disabled"},
/* only need xtensa atm */
static void xtensa_dsp_oops(struct snd_sof_dev *sdev, void *oops)
struct sof_ipc_dsp_oops_xtensa *xoops = oops;
int i;
dev_err(sdev->dev, "error: DSP Firmware Oops\n");
for (i = 0; i < ARRAY_SIZE(xtensa_exception_causes); i++) {
if (xtensa_exception_causes[i].id == xoops->exccause) {
dev_err(sdev->dev, "error: Exception Cause: %s, %s\n",
dev_err(sdev->dev, "EXCCAUSE 0x%8.8x EXCVADDR 0x%8.8x PS 0x%8.8x SAR 0x%8.8x\n",
xoops->exccause, xoops->excvaddr, xoops->ps, xoops->sar);
dev_err(sdev->dev, "EPC1 0x%8.8x EPC2 0x%8.8x EPC3 0x%8.8x EPC4 0x%8.8x",
xoops->epc1, xoops->epc2, xoops->epc3, xoops->epc4);
dev_err(sdev->dev, "EPC5 0x%8.8x EPC6 0x%8.8x EPC7 0x%8.8x DEPC 0x%8.8x",
xoops->epc5, xoops->epc6, xoops->epc7, xoops->depc);
dev_err(sdev->dev, "EPS2 0x%8.8x EPS3 0x%8.8x EPS4 0x%8.8x EPS5 0x%8.8x",
xoops->eps2, xoops->eps3, xoops->eps4, xoops->eps5);
dev_err(sdev->dev, "EPS6 0x%8.8x EPS7 0x%8.8x INTENABL 0x%8.8x INTERRU 0x%8.8x",
xoops->eps6, xoops->eps7, xoops->intenable, xoops->interrupt);
static void xtensa_stack(struct snd_sof_dev *sdev, void *oops, u32 *stack,
u32 stack_words)
struct sof_ipc_dsp_oops_xtensa *xoops = oops;
u32 stack_ptr = xoops->plat_hdr.stackptr;
/* 4 * 8chars + 3 ws + 1 terminating NUL */
unsigned char buf[4 * 8 + 3 + 1];
int i;
dev_err(sdev->dev, "stack dump from 0x%8.8x\n", stack_ptr);
* example output:
* 0x0049fbb0: 8000f2d0 0049fc00 6f6c6c61 00632e63
for (i = 0; i < stack_words; i += 4) {
hex_dump_to_buffer(stack + i, 16, 16, 4,
buf, sizeof(buf), false);
dev_err(sdev->dev, "0x%08x: %s\n", stack_ptr + i * 4, buf);
const struct dsp_arch_ops sof_xtensa_arch_ops = {
.dsp_oops = xtensa_dsp_oops,
.dsp_stack = xtensa_stack,
EXPORT_SYMBOL_NS(sof_xtensa_arch_ops, SND_SOC_SOF_XTENSA);