cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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imx-common.c (2932B)

      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 <linux/module.h>
      8#include <sound/sof/xtensa.h>
      9#include "../ops.h"
     10
     11#include "imx-common.h"
     12
     13/**
     14 * imx8_get_registers() - This function is called in case of DSP oops
     15 * in order to gather information about the registers, filename and
     16 * linenumber and stack.
     17 * @sdev: SOF device
     18 * @xoops: Stores information about registers.
     19 * @panic_info: Stores information about filename and line number.
     20 * @stack: Stores the stack dump.
     21 * @stack_words: Size of the stack dump.
     22 */
     23void imx8_get_registers(struct snd_sof_dev *sdev,
     24			struct sof_ipc_dsp_oops_xtensa *xoops,
     25			struct sof_ipc_panic_info *panic_info,
     26			u32 *stack, size_t stack_words)
     27{
     28	u32 offset = sdev->dsp_oops_offset;
     29
     30	/* first read registers */
     31	sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));
     32
     33	/* then get panic info */
     34	if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {
     35		dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n",
     36			xoops->arch_hdr.totalsize);
     37		return;
     38	}
     39	offset += xoops->arch_hdr.totalsize;
     40	sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));
     41
     42	/* then get the stack */
     43	offset += sizeof(*panic_info);
     44	sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));
     45}
     46
     47/**
     48 * imx8_dump() - This function is called when a panic message is
     49 * received from the firmware.
     50 * @sdev: SOF device
     51 * @flags: parameter not used but required by ops prototype
     52 */
     53void imx8_dump(struct snd_sof_dev *sdev, u32 flags)
     54{
     55	struct sof_ipc_dsp_oops_xtensa xoops;
     56	struct sof_ipc_panic_info panic_info;
     57	u32 stack[IMX8_STACK_DUMP_SIZE];
     58	u32 status;
     59
     60	/* Get information about the panic status from the debug box area.
     61	 * Compute the trace point based on the status.
     62	 */
     63	sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4);
     64
     65	/* Get information about the registers, the filename and line
     66	 * number and the stack.
     67	 */
     68	imx8_get_registers(sdev, &xoops, &panic_info, stack,
     69			   IMX8_STACK_DUMP_SIZE);
     70
     71	/* Print the information to the console */
     72	sof_print_oops_and_stack(sdev, KERN_ERR, status, status, &xoops,
     73				 &panic_info, stack, IMX8_STACK_DUMP_SIZE);
     74}
     75EXPORT_SYMBOL(imx8_dump);
     76
     77int imx8_parse_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
     78{
     79	int ret;
     80
     81	ret = devm_clk_bulk_get(sdev->dev, clks->num_dsp_clks, clks->dsp_clks);
     82	if (ret)
     83		dev_err(sdev->dev, "Failed to request DSP clocks\n");
     84
     85	return ret;
     86}
     87EXPORT_SYMBOL(imx8_parse_clocks);
     88
     89int imx8_enable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
     90{
     91	return clk_bulk_prepare_enable(clks->num_dsp_clks, clks->dsp_clks);
     92}
     93EXPORT_SYMBOL(imx8_enable_clocks);
     94
     95void imx8_disable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
     96{
     97	clk_bulk_disable_unprepare(clks->num_dsp_clks, clks->dsp_clks);
     98}
     99EXPORT_SYMBOL(imx8_disable_clocks);
    100
    101MODULE_LICENSE("Dual BSD/GPL");