/*
 * Copyright 2021, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 */


#include <Htif.h>


uint64
HtifCmd(uint32 device, uint8 cmd, uint32 arg)
{
        if (gHtifRegs == 0)
                return 0;

        uint64 htifTohost = ((uint64)device << 56)
                + ((uint64)cmd << 48) + arg;
        gHtifRegs->toHostLo = htifTohost % ((uint64)1 << 32);
        gHtifRegs->toHostHi = htifTohost / ((uint64)1 << 32);
        return (uint64)gHtifRegs->fromHostLo
                + ((uint64)gHtifRegs->fromHostHi << 32);
}


void
HtifShutdown()
{
        HtifCmd(0, 0, 1);
}


void
HtifOutChar(char ch)
{
        HtifCmd(1, 1, ch);
}


void
HtifOutString(const char *str)
{
        for (; *str != '\0'; str++)
                HtifOutChar(*str);
}


void
HtifOutString(const char *str, size_t len)
{
        for (; len > 0; str++, len--)
                HtifOutChar(*str);
}