62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* ram_console.c - Console messages to a RAM buffer */
|
|
|
|
/*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
* Copyright 2024 NXP
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
|
|
#include <zephyr/kernel.h>
|
|
#include <zephyr/sys/printk.h>
|
|
#include <zephyr/sys/printk-hooks.h>
|
|
#include <zephyr/sys/libc-hooks.h>
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/init.h>
|
|
#include <zephyr/linker/devicetree_regions.h>
|
|
|
|
#ifdef CONFIG_RAM_CONSOLE_BUFFER_SECTION
|
|
#if !DT_HAS_CHOSEN(zephyr_ram_console)
|
|
#error "Lack of chosen property zephyr,ram_console!"
|
|
#elif (CONFIG_RAM_CONSOLE_BUFFER_SIZE > DT_REG_SIZE(DT_CHOSEN(zephyr_ram_console)))
|
|
#error "Custom RAM console buffer exceeds the section size!"
|
|
#endif
|
|
|
|
#define RAM_CONSOLE_BUF_ATTR \
|
|
__attribute__((__section__(LINKER_DT_NODE_REGION_NAME(DT_CHOSEN(zephyr_ram_console)))))
|
|
#else
|
|
#define RAM_CONSOLE_BUF_ATTR
|
|
#endif
|
|
|
|
char ram_console_buf[CONFIG_RAM_CONSOLE_BUFFER_SIZE] RAM_CONSOLE_BUF_ATTR;
|
|
char *ram_console;
|
|
static int pos;
|
|
|
|
static int ram_console_out(int character)
|
|
{
|
|
ram_console[pos] = (char)character;
|
|
/* Leave one byte to ensure we're always NULL-terminated */
|
|
pos = (pos + 1) % (CONFIG_RAM_CONSOLE_BUFFER_SIZE - 1);
|
|
return character;
|
|
}
|
|
|
|
static int ram_console_init(void)
|
|
{
|
|
#ifdef CONFIG_RAM_CONSOLE_BUFFER_SECTION
|
|
mm_reg_t ram_console_va;
|
|
|
|
device_map((mm_reg_t *)&ram_console_va, DT_REG_ADDR(DT_CHOSEN(zephyr_ram_console)),
|
|
CONFIG_RAM_CONSOLE_BUFFER_SIZE, K_MEM_CACHE_NONE | K_MEM_DIRECT_MAP);
|
|
ram_console = (char *)ram_console_va,
|
|
#else
|
|
ram_console = ram_console_buf,
|
|
#endif
|
|
__printk_hook_install(ram_console_out);
|
|
__stdout_hook_install(ram_console_out);
|
|
|
|
return 0;
|
|
}
|
|
|
|
SYS_INIT(ram_console_init, PRE_KERNEL_1, CONFIG_CONSOLE_INIT_PRIORITY);
|