// SPDX-License-Identifier: GPL-3.0-or-later
// Copyright (c) 2026 0xKSor

#include <IO/Serial.h>
#include <Arch/IO.h>
#include <Arch/CPU.h>

static UInt64 sUARTAddress = kUARTBaseAddress;

void SerialUpdate(UInt64 address) {
    sUARTAddress = address;
}

Int32 SerialPutCharacter(ASCII character) {
    // TXFF -- TRansmit FIFO Full for PL011 is 5 bit of FR reg (0x18)
    UInt64 uartFR = sUARTAddress + 0x18;

    while ((IOAddressRead32(uartFR) & (1 << 5)) != 0)  {
        CPUYield();
    }

    IOAddressWrite32(sUARTAddress, character);
    return character;
}

Int32 SerialPutString(const ASCII* string) {
    Int i = 0;
    while (string[i] != '\0') {
        SerialPutCharacter(string[i]);
        i++;
    }

    return i;
}