qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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addr.c (1839B)

      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 }