target/mips/addr.c

   1 /*
   2  * QEMU MIPS address translation support
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20  * THE SOFTWARE.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "cpu.h"
  25
  26 static int mips_um_ksegs;
  27
  28 uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
  29 {
  30     return addr & 0x1fffffffll;
  31 }
  32
  33 uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
  34 {
  35     return addr | ~0x7fffffffll;
  36 }
  37
  38 uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
  39 {
  40     return addr | 0x40000000ll;
  41 }
  42
  43 uint64_t cpu_mips_kseg1_to_phys(void *opaque, uint64_t addr)
  44 {
  45     return addr & 0x1fffffffll;
  46 }
  47
  48 uint64_t cpu_mips_phys_to_kseg1(void *opaque, uint64_t addr)
  49 {
  50     return (addr & 0x1fffffffll) | 0xffffffffa0000000ll;
  51 }
  52
  53 bool mips_um_ksegs_enabled(void)
  54 {
  55     return mips_um_ksegs;
  56 }
  57
  58 void mips_um_ksegs_enable(void)
  59 {
  60     mips_um_ksegs = 1;
  61 }