66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
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/*
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* Copyright (c) 2024 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <ctype.h>
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#include <zephyr/kernel.h>
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#include <string.h>
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#include <tracing_core.h>
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#include <tracing_buffer.h>
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#include <tracing_backend.h>
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#include <adsp_memory.h>
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#include <adsp_debug_window.h>
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/* structure of memory window */
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struct tracing_backend_adsp_memory_window {
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uint32_t head_offset; /* offset of the first not used byte in data[] */
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uint8_t data[]; /* tracing data */
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} __packed __aligned(8);
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#define ADSP_TRACING_WINDOW_DATA_SIZE \
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(ADSP_DW_SLOT_SIZE - offsetof(struct tracing_backend_adsp_memory_window, data))
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static volatile struct tracing_backend_adsp_memory_window *mem_window;
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static void tracing_backend_adsp_memory_window_output(
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const struct tracing_backend *backend,
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uint8_t *data, uint32_t length)
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{
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/* copy data to ring buffer,
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* to make FW part fast, there's no sync with the data reader
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* the reader MUST read data before they got overwritten
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*/
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size_t to_copy = MIN(length, ADSP_TRACING_WINDOW_DATA_SIZE - mem_window->head_offset);
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memcpy((void *)(mem_window->data + mem_window->head_offset), data, to_copy);
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length -= to_copy;
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if (length) {
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memcpy((void *)mem_window->data, data + to_copy, length);
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mem_window->head_offset = length;
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} else
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mem_window->head_offset += to_copy;
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}
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static void tracing_backend_adsp_memory_window_init(void)
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{
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volatile struct adsp_debug_window *window = ADSP_DW;
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window->descs[ADSP_DW_SLOT_NUM_TRACE].type = ADSP_DW_SLOT_TRACE;
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window->descs[ADSP_DW_SLOT_NUM_TRACE].resource_id = 0;
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mem_window = (struct tracing_backend_adsp_memory_window *)
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ADSP_DW->slots[ADSP_DW_SLOT_NUM_TRACE];
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mem_window->head_offset = 0;
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}
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const struct tracing_backend_api tracing_backend_adsp_memory_window_api = {
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.init = tracing_backend_adsp_memory_window_init,
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.output = tracing_backend_adsp_memory_window_output
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};
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TRACING_BACKEND_DEFINE(tracing_backend_adsp_memory_window, tracing_backend_adsp_memory_window_api);
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