xref: /openbmc/qemu/target/mips/sysemu/addr.c (revision 85d8da3fea0c4ff38bbe759febfc2d2299b33ccd)
1*85d8da3fSPhilippe Mathieu-Daudé /*
2*85d8da3fSPhilippe Mathieu-Daudé  * QEMU MIPS address translation support
3*85d8da3fSPhilippe Mathieu-Daudé  *
4*85d8da3fSPhilippe Mathieu-Daudé  * Permission is hereby granted, free of charge, to any person obtaining a copy
5*85d8da3fSPhilippe Mathieu-Daudé  * of this software and associated documentation files (the "Software"), to deal
6*85d8da3fSPhilippe Mathieu-Daudé  * in the Software without restriction, including without limitation the rights
7*85d8da3fSPhilippe Mathieu-Daudé  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8*85d8da3fSPhilippe Mathieu-Daudé  * copies of the Software, and to permit persons to whom the Software is
9*85d8da3fSPhilippe Mathieu-Daudé  * furnished to do so, subject to the following conditions:
10*85d8da3fSPhilippe Mathieu-Daudé  *
11*85d8da3fSPhilippe Mathieu-Daudé  * The above copyright notice and this permission notice shall be included in
12*85d8da3fSPhilippe Mathieu-Daudé  * all copies or substantial portions of the Software.
13*85d8da3fSPhilippe Mathieu-Daudé  *
14*85d8da3fSPhilippe Mathieu-Daudé  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*85d8da3fSPhilippe Mathieu-Daudé  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*85d8da3fSPhilippe Mathieu-Daudé  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*85d8da3fSPhilippe Mathieu-Daudé  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18*85d8da3fSPhilippe Mathieu-Daudé  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19*85d8da3fSPhilippe Mathieu-Daudé  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20*85d8da3fSPhilippe Mathieu-Daudé  * THE SOFTWARE.
21*85d8da3fSPhilippe Mathieu-Daudé  */
22*85d8da3fSPhilippe Mathieu-Daudé 
23*85d8da3fSPhilippe Mathieu-Daudé #include "qemu/osdep.h"
24*85d8da3fSPhilippe Mathieu-Daudé #include "cpu.h"
25*85d8da3fSPhilippe Mathieu-Daudé 
26*85d8da3fSPhilippe Mathieu-Daudé static int mips_um_ksegs;
27*85d8da3fSPhilippe Mathieu-Daudé 
28*85d8da3fSPhilippe Mathieu-Daudé uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
29*85d8da3fSPhilippe Mathieu-Daudé {
30*85d8da3fSPhilippe Mathieu-Daudé     return addr & 0x1fffffffll;
31*85d8da3fSPhilippe Mathieu-Daudé }
32*85d8da3fSPhilippe Mathieu-Daudé 
33*85d8da3fSPhilippe Mathieu-Daudé uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
34*85d8da3fSPhilippe Mathieu-Daudé {
35*85d8da3fSPhilippe Mathieu-Daudé     return addr | ~0x7fffffffll;
36*85d8da3fSPhilippe Mathieu-Daudé }
37*85d8da3fSPhilippe Mathieu-Daudé 
38*85d8da3fSPhilippe Mathieu-Daudé uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
39*85d8da3fSPhilippe Mathieu-Daudé {
40*85d8da3fSPhilippe Mathieu-Daudé     return addr | 0x40000000ll;
41*85d8da3fSPhilippe Mathieu-Daudé }
42*85d8da3fSPhilippe Mathieu-Daudé 
43*85d8da3fSPhilippe Mathieu-Daudé uint64_t cpu_mips_kseg1_to_phys(void *opaque, uint64_t addr)
44*85d8da3fSPhilippe Mathieu-Daudé {
45*85d8da3fSPhilippe Mathieu-Daudé     return addr & 0x1fffffffll;
46*85d8da3fSPhilippe Mathieu-Daudé }
47*85d8da3fSPhilippe Mathieu-Daudé 
48*85d8da3fSPhilippe Mathieu-Daudé uint64_t cpu_mips_phys_to_kseg1(void *opaque, uint64_t addr)
49*85d8da3fSPhilippe Mathieu-Daudé {
50*85d8da3fSPhilippe Mathieu-Daudé     return (addr & 0x1fffffffll) | 0xffffffffa0000000ll;
51*85d8da3fSPhilippe Mathieu-Daudé }
52*85d8da3fSPhilippe Mathieu-Daudé 
53*85d8da3fSPhilippe Mathieu-Daudé bool mips_um_ksegs_enabled(void)
54*85d8da3fSPhilippe Mathieu-Daudé {
55*85d8da3fSPhilippe Mathieu-Daudé     return mips_um_ksegs;
56*85d8da3fSPhilippe Mathieu-Daudé }
57*85d8da3fSPhilippe Mathieu-Daudé 
58*85d8da3fSPhilippe Mathieu-Daudé void mips_um_ksegs_enable(void)
59*85d8da3fSPhilippe Mathieu-Daudé {
60*85d8da3fSPhilippe Mathieu-Daudé     mips_um_ksegs = 1;
61*85d8da3fSPhilippe Mathieu-Daudé }
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