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// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Distributed under the Apache Software License, Version 2.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.apache.org/licenses/LICENSE-2.0)
// Official repository: https://github.com/nekernel-org/neboot
#include <include/boot.h>
#include <include/string.h>
/// BUGS: 0
/* this file handles the UART */
static uint8_t* nb_uart_ptr = (uint8_t*) NB_UART_BASE;
utf_char_t nb_get_char(void) {
uintptr_t ptr = NB_UART_BASE;
while (!(*(((volatile uint8_t*) ptr) + 0x05) & 0x01));
return (utf_char_t) *nb_uart_ptr;
}
// we need that one, to avoid sending mutliple chars to UART.
static boolean nb_locked_put_char = no;
void nb_put_char(utf_char_t ch) {
int32_t timeout = 0;
while (nb_locked_put_char) {
++timeout;
if (timeout > 1000000) break;
}
nb_locked_put_char = yes;
*nb_uart_ptr = ch;
nb_locked_put_char = no;
}
/// @brief UART put string
/// @param text the input text.
size_t nb_put_string(const char* text) {
if (text == nil) return 0;
size_t i = 0;
for (; i < strlen(text); i++) {
nb_put_char(text[i]);
}
return i;
}
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