arm_versatile/Serial.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "Serial.h"

ArmVersatileSerial::ArmVersatileSerial()
// : m_pRegs(0)
{
}
ArmVersatileSerial::~ArmVersatileSerial()
{
}
void ArmVersatileSerial::setBase(uintptr_t nBaseAddr)
{
    //  tmp = nBaseAddr;
    //  m_pRegs = reinterpret_cast<volatile serial*> (nBaseAddr);
}
char ArmVersatileSerial::read()
{
    volatile uint32_t *dr = reinterpret_cast<volatile uint32_t *>(0x101f1000);
    uint32_t c = 0;
    while (c == 0)
        c = *dr;  // m_pRegs->dr;
    return static_cast<char>(c);
}
char ArmVersatileSerial::readNonBlock()
{
    volatile uint32_t *dr = reinterpret_cast<volatile uint32_t *>(0x101f1000);
    return static_cast<char>(*dr);
    // return static_cast<char>(m_pRegs->dr);
}
void ArmVersatileSerial::write(char c)
{
    volatile uint32_t *dr = reinterpret_cast<volatile uint32_t *>(0x101f1000);
    if (c == '\n')
        write('\r');
    *dr = static_cast<uint32_t>(c);
    asm volatile("" ::: "memory");
}