ef14c9b867
Add a zephyr/printk.h header for the __printk_hook functions, these are currently manually declared by all console drivers for no good reason. Move the documentation into the header and also unify the way that console drivers call the function. Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
63 lines
1.7 KiB
C
63 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/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
|
|
|
|
extern void __stdout_hook_install(int (*fn)(int));
|
|
|
|
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);
|