qemu/hw/mips/addr.c

/*
 * QEMU MIPS address translation support
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/mips/cpudevs.h"

static int mips_um_ksegs;

uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
{
    return addr & 0x1fffffffll;
}

uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
{
    return addr | ~0x7fffffffll;
}

uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
{
    return addr | 0x40000000ll;
}

bool mips_um_ksegs_enabled(void)
{
    return mips_um_ksegs;
}

void mips_um_ksegs_enable(void)
{
    mips_um_ksegs = 1;
}