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