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/* -------------------------------------------
Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <lib/boot.h>
#include <lib/string.h>
/// BUGS: 0
#define ARM64_MMIO_REG(addr) (*(volatile uint32_t*) (cb_uart_ptr + addr))
/* this file handles the UART */
static uint32_t* cb_uart_ptr = (uint32_t*) CB_UART_BASE;
/// @brief Retrieve character from cb_uart_ptr
utf_char_t cb_get_char(void) {
while ((ARM64_MMIO_REG(0x018) & (1 << 4))) {
}
return (utf_char_t) ARM64_MMIO_REG(0x0) & 0xFF;
}
void cb_put_char(utf_char_t ch) {
while ((ARM64_MMIO_REG(0x018) & (1 << 5))) {
}
ARM64_MMIO_REG(0x0) = ch;
}
/// @brief UART put string
/// @param text the input text.
size_t cb_put_string(const char* text) {
if (text == nil) return 0;
size_t i = 0;
for (; i < strlen(text); i++) {
cb_put_char(text[i]);
}
return i;
}
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