diff options
Diffstat (limited to 'sound/soc/sof/imx/imx-common.c')
-rw-r--r-- | sound/soc/sof/imx/imx-common.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sound/soc/sof/imx/imx-common.c b/sound/soc/sof/imx/imx-common.c new file mode 100644 index 000000000000..63d8a5d7bc44 --- /dev/null +++ b/sound/soc/sof/imx/imx-common.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) +// +// Copyright 2020 NXP +// +// Common helpers for the audio DSP on i.MX8 + +#include <sound/sof/xtensa.h> +#include "../ops.h" + +#include "imx-common.h" + +/** + * imx8_get_registers() - This function is called in case of DSP oops + * in order to gather information about the registers, filename and + * linenumber and stack. + * @sdev: SOF device + * @xoops: Stores information about registers. + * @panic_info: Stores information about filename and line number. + * @stack: Stores the stack dump. + * @stack_words: Size of the stack dump. + */ +void imx8_get_registers(struct snd_sof_dev *sdev, + struct sof_ipc_dsp_oops_xtensa *xoops, + struct sof_ipc_panic_info *panic_info, + u32 *stack, size_t stack_words) +{ + u32 offset = sdev->dsp_oops_offset; + + /* first read registers */ + sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops)); + + /* then get panic info */ + if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) { + dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n", + xoops->arch_hdr.totalsize); + return; + } + offset += xoops->arch_hdr.totalsize; + sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info)); + + /* then get the stack */ + offset += sizeof(*panic_info); + sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32)); +} + +/** + * imx8_dump() - This function is called when a panic message is + * received from the firmware. + */ +void imx8_dump(struct snd_sof_dev *sdev, u32 flags) +{ + struct sof_ipc_dsp_oops_xtensa xoops; + struct sof_ipc_panic_info panic_info; + u32 stack[IMX8_STACK_DUMP_SIZE]; + u32 status; + + /* Get information about the panic status from the debug box area. + * Compute the trace point based on the status. + */ + sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4); + + /* Get information about the registers, the filename and line + * number and the stack. + */ + imx8_get_registers(sdev, &xoops, &panic_info, stack, + IMX8_STACK_DUMP_SIZE); + + /* Print the information to the console */ + snd_sof_get_status(sdev, status, status, &xoops, &panic_info, stack, + IMX8_STACK_DUMP_SIZE); +} +EXPORT_SYMBOL(imx8_dump); |