Commit | Line | Data |
---|---|---|
6729cf79 SR |
1 | /* Assembler variants of srmmu access functions. |
2 | * Implemented in assembler to allow run-time patching. | |
3 | * LEON uses a different ASI for MMUREGS than SUN. | |
4 | * | |
5 | * The leon_1insn_patch infrastructure is used | |
6 | * for the run-time patching. | |
7 | */ | |
8 | ||
9 | #include <linux/linkage.h> | |
10 | ||
11 | #include <asm/asmmacro.h> | |
12 | #include <asm/pgtsrmmu.h> | |
13 | #include <asm/asi.h> | |
14 | ||
15 | /* unsigned int srmmu_get_mmureg(void) */ | |
16 | ENTRY(srmmu_get_mmureg) | |
17 | LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0) | |
18 | SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0) | |
19 | retl | |
20 | nop | |
21 | ENDPROC(srmmu_get_mmureg) | |
22 | ||
23 | /* void srmmu_set_mmureg(unsigned long regval) */ | |
24 | ENTRY(srmmu_set_mmureg) | |
25 | LEON_PI(sta %o0, [%g0] ASI_LEON_MMUREGS) | |
26 | SUN_PI_(sta %o0, [%g0] ASI_M_MMUREGS) | |
27 | retl | |
28 | nop | |
29 | ENDPROC(srmmu_set_mmureg) | |
30 | ||
31 | /* void srmmu_set_ctable_ptr(unsigned long paddr) */ | |
32 | ENTRY(srmmu_set_ctable_ptr) | |
33 | /* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */ | |
34 | srl %o0, 4, %g1 | |
35 | and %g1, SRMMU_CTX_PMASK, %g1 | |
36 | ||
37 | mov SRMMU_CTXTBL_PTR, %g2 | |
38 | LEON_PI(sta %g1, [%g2] ASI_LEON_MMUREGS) | |
39 | SUN_PI_(sta %g1, [%g2] ASI_M_MMUREGS) | |
40 | retl | |
41 | nop | |
42 | ENDPROC(srmmu_set_ctable_ptr) | |
43 | ||
44 | ||
45 | /* void srmmu_set_context(int context) */ | |
46 | ENTRY(srmmu_set_context) | |
47 | mov SRMMU_CTX_REG, %g1 | |
48 | LEON_PI(sta %o0, [%g1] ASI_LEON_MMUREGS) | |
49 | SUN_PI_(sta %o0, [%g1] ASI_M_MMUREGS) | |
50 | retl | |
51 | nop | |
52 | ENDPROC(srmmu_set_context) | |
53 | ||
54 | ||
55 | /* int srmmu_get_context(void) */ | |
56 | ENTRY(srmmu_get_context) | |
57 | mov SRMMU_CTX_REG, %o0 | |
58 | LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) | |
59 | SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) | |
60 | retl | |
61 | nop | |
62 | ENDPROC(srmmu_get_context) | |
63 | ||
64 | ||
65 | /* unsigned int srmmu_get_fstatus(void) */ | |
66 | ENTRY(srmmu_get_fstatus) | |
67 | mov SRMMU_FAULT_STATUS, %o0 | |
68 | LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) | |
69 | SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) | |
70 | retl | |
71 | nop | |
72 | ENDPROC(srmmu_get_fstatus) | |
73 | ||
74 | ||
75 | /* unsigned int srmmu_get_faddr(void) */ | |
76 | ENTRY(srmmu_get_faddr) | |
77 | mov SRMMU_FAULT_ADDR, %o0 | |
78 | LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) | |
79 | SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) | |
80 | retl | |
81 | nop | |
82 | ENDPROC(srmmu_get_faddr) |