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log: Add Intel ADSP logging backend

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Add logging backend for Intel Audio DSP.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
This commit is contained in:
Andrei Emeltchenko 2019-11-19 12:35:35 +02:00 • committed by Anas Nashif
commit 18e58db3e4
3 changed files with 183 additions and 1 deletions
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156
subsys/logging/log_backend_adsp.c Normal file
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/*
* Copyright (c) 2019 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <logging/log_backend.h>
#include <logging/log_core.h>
#include <logging/log_msg.h>
#include <logging/log_output.h>
#include <sys/ring_buffer.h>
#include <zephyr.h>
#include <device.h>
#include <assert.h>
#include <soc.h>
#define BUF_SIZE 64
BUILD_ASSERT(CONFIG_LOG_BACKEND_ADSP_RINGBUF_SIZE % BUF_SIZE == 0);
static struct ring_buf ringbuf;
/*
* Log message format
* logging started with magic number 0x55aa followed by lo message id.
* Log message ended with null terminator and takes BUF_SIZE slot
*/
static void init(void)
{
ring_buf_init(&ringbuf, CONFIG_LOG_BACKEND_ADSP_RINGBUF_SIZE,
(void *)CONFIG_LOG_BACKEND_ADSP_RINGBUF_BASE);
}
static void trace(const u8_t *data, size_t length)
{
const u16_t magic = 0x55aa;
static u16_t log_id;
volatile u8_t *t, *region;
int space;
int i;
space = ring_buf_space_get(&ringbuf);
if (space < BUF_SIZE) {
u8_t *dummy;
/* Remove oldest entry */
ring_buf_get_claim(&ringbuf, &dummy, BUF_SIZE);
ring_buf_get_finish(&ringbuf, BUF_SIZE);
}
ring_buf_put_claim(&ringbuf, (u8_t **)&t, BUF_SIZE);
region = t;
/* Add magic number at the beginning of the slot */
*(u16_t *)t = magic;
t += 2;
/* Add log id */
*(u16_t *)t = log_id++;
t += 2;
for (i = 0; i < MIN(length, BUF_SIZE - 4); i++) {
*t++ = data[i];
}
SOC_DCACHE_FLUSH((void *)region, BUF_SIZE);
ring_buf_put_finish(&ringbuf, BUF_SIZE);
}
static int char_out(u8_t *data, size_t length, void *ctx)
{
trace(data, length);
return length;
}
/* magic and log id takes space */
static u8_t buf[BUF_SIZE - 4];
LOG_OUTPUT_DEFINE(log_output, char_out, buf, sizeof(buf));
static void put(const struct log_backend *const backend,
struct log_msg *msg)
{
log_msg_get(msg);
u32_t flags = LOG_OUTPUT_FLAG_LEVEL;
if (IS_ENABLED(CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP)) {
flags |= LOG_OUTPUT_FLAG_FORMAT_TIMESTAMP;
}
log_output_msg_process(&log_output, msg, flags);
log_msg_put(msg);
}
static void panic(struct log_backend const *const backend)
{
log_output_flush(&log_output);
}
static void dropped(const struct log_backend *const backend, u32_t cnt)
{
ARG_UNUSED(backend);
log_output_dropped_process(&log_output, cnt);
}
static void sync_string(const struct log_backend *const backend,
struct log_msg_ids src_level, u32_t timestamp,
const char *fmt, va_list ap)
{
u32_t flags = LOG_OUTPUT_FLAG_LEVEL;
u32_t key;
if (IS_ENABLED(CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP)) {
flags |= LOG_OUTPUT_FLAG_FORMAT_TIMESTAMP;
}
key = irq_lock();
log_output_string(&log_output, src_level, timestamp, fmt, ap, flags);
irq_unlock(key);
}
static void sync_hexdump(const struct log_backend *const backend,
struct log_msg_ids src_level, u32_t timestamp,
const char *metadata, const u8_t *data, u32_t length)
{
u32_t flags = LOG_OUTPUT_FLAG_LEVEL | LOG_OUTPUT_FLAG_TIMESTAMP;
u32_t key;
if (IS_ENABLED(CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP)) {
flags |= LOG_OUTPUT_FLAG_FORMAT_TIMESTAMP;
}
key = irq_lock();
log_output_hexdump(&log_output, src_level, timestamp,
metadata, data, length, flags);
irq_unlock(key);
}
const struct log_backend_api log_backend_adsp_api = {
.put = IS_ENABLED(CONFIG_LOG_IMMEDIATE) ? NULL : put,
.put_sync_string = IS_ENABLED(CONFIG_LOG_IMMEDIATE) ?
sync_string : NULL,
.put_sync_hexdump = IS_ENABLED(CONFIG_LOG_IMMEDIATE) ?
sync_hexdump : NULL,
.panic = panic,
.init = init,
.dropped = IS_ENABLED(CONFIG_LOG_IMMEDIATE) ? NULL : dropped,
};
LOG_BACKEND_DEFINE(log_backend_adsp, log_backend_adsp_api, true);