1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // Copyright 2020 NXP 4 // 5 // Common helpers for the audio DSP on i.MX8 6 7 #include <sound/sof/xtensa.h> 8 #include "../ops.h" 9 10 #include "imx-common.h" 11 12 /** 13 * imx8_get_registers() - This function is called in case of DSP oops 14 * in order to gather information about the registers, filename and 15 * linenumber and stack. 16 * @sdev: SOF device 17 * @xoops: Stores information about registers. 18 * @panic_info: Stores information about filename and line number. 19 * @stack: Stores the stack dump. 20 * @stack_words: Size of the stack dump. 21 */ 22 void imx8_get_registers(struct snd_sof_dev *sdev, 23 struct sof_ipc_dsp_oops_xtensa *xoops, 24 struct sof_ipc_panic_info *panic_info, 25 u32 *stack, size_t stack_words) 26 { 27 u32 offset = sdev->dsp_oops_offset; 28 29 /* first read registers */ 30 sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops)); 31 32 /* then get panic info */ 33 if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) { 34 dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n", 35 xoops->arch_hdr.totalsize); 36 return; 37 } 38 offset += xoops->arch_hdr.totalsize; 39 sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info)); 40 41 /* then get the stack */ 42 offset += sizeof(*panic_info); 43 sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32)); 44 } 45 46 /** 47 * imx8_dump() - This function is called when a panic message is 48 * received from the firmware. 49 */ 50 void imx8_dump(struct snd_sof_dev *sdev, u32 flags) 51 { 52 struct sof_ipc_dsp_oops_xtensa xoops; 53 struct sof_ipc_panic_info panic_info; 54 u32 stack[IMX8_STACK_DUMP_SIZE]; 55 u32 status; 56 57 /* Get information about the panic status from the debug box area. 58 * Compute the trace point based on the status. 59 */ 60 sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4); 61 62 /* Get information about the registers, the filename and line 63 * number and the stack. 64 */ 65 imx8_get_registers(sdev, &xoops, &panic_info, stack, 66 IMX8_STACK_DUMP_SIZE); 67 68 /* Print the information to the console */ 69 snd_sof_get_status(sdev, status, status, &xoops, &panic_info, stack, 70 IMX8_STACK_DUMP_SIZE); 71 } 72 EXPORT_SYMBOL(imx8_dump); 73