72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
|
|
* Copyright (c) 2016 Cadence Design Systems, Inc.
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <xtensa/simcall.h>
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/init.h>
|
|
#include <zephyr/sys/printk-hooks.h>
|
|
|
|
#if defined(CONFIG_PRINTK) || defined(CONFIG_STDOUT_CONSOLE)
|
|
/**
|
|
* @brief Output one character to SIMULATOR console
|
|
* @param c Character to output
|
|
* @return The character passed as input.
|
|
*/
|
|
int arch_printk_char_out(int c)
|
|
{
|
|
char buf[16];
|
|
|
|
register int a2 __asm__ ("a2") = SYS_write;
|
|
register int a3 __asm__ ("a3") = 1;
|
|
register char *a4 __asm__ ("a4") = buf;
|
|
register int a5 __asm__ ("a5") = 1;
|
|
register int ret_val __asm__ ("a2");
|
|
register int ret_err __asm__ ("a3");
|
|
|
|
buf[0] = (char)c;
|
|
__asm__ volatile ("simcall"
|
|
: "=a" (ret_val), "=a" (ret_err)
|
|
: "a" (a2), "a" (a3), "a" (a4), "a" (a5)
|
|
: "memory");
|
|
return c;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_STDOUT_CONSOLE)
|
|
extern void __stdout_hook_install(int (*hook)(int));
|
|
#endif
|
|
|
|
/**
|
|
* @brief Install printk/stdout hook for Xtensa Simulator console output
|
|
*/
|
|
static void xt_sim_console_hook_install(void)
|
|
{
|
|
#if defined(CONFIG_STDOUT_CONSOLE)
|
|
__stdout_hook_install(arch_printk_char_out);
|
|
#endif
|
|
#if defined(CONFIG_PRINTK)
|
|
__printk_hook_install(arch_printk_char_out);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* @brief Initialize the console/debug port
|
|
* @return 0 if successful, otherwise failed.
|
|
*/
|
|
static int xt_sim_console_init(void)
|
|
{
|
|
xt_sim_console_hook_install();
|
|
return 0;
|
|
}
|
|
|
|
/* UART console initializes after the UART device itself */
|
|
SYS_INIT(xt_sim_console_init,
|
|
#if defined(CONFIG_EARLY_CONSOLE)
|
|
PRE_KERNEL_1,
|
|
#else
|
|
POST_KERNEL,
|
|
#endif
|
|
CONFIG_CONSOLE_INIT_PRIORITY);
|