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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
a00736e9 SR |
2 | #ifndef _SPARC64_VISASM_H |
3 | #define _SPARC64_VISASM_H | |
4 | ||
5 | /* visasm.h: FPU saving macros for VIS routines | |
6 | * | |
7 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) | |
8 | */ | |
9 | ||
10 | #include <asm/pstate.h> | |
11 | #include <asm/ptrace.h> | |
12 | ||
13 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ | |
14 | ||
15 | #define VISEntry \ | |
16 | rd %fprs, %o5; \ | |
17 | andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ | |
18 | be,pt %icc, 297f; \ | |
19 | sethi %hi(297f), %g7; \ | |
20 | sethi %hi(VISenter), %g1; \ | |
21 | jmpl %g1 + %lo(VISenter), %g0; \ | |
22 | or %g7, %lo(297f), %g7; \ | |
23 | 297: wr %g0, FPRS_FEF, %fprs; \ | |
24 | ||
25 | #define VISExit \ | |
26 | wr %g0, 0, %fprs; | |
27 | ||
28 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. | |
29 | * Must preserve %o5 between VISEntryHalf and VISExitHalf */ | |
30 | ||
31 | #define VISEntryHalf \ | |
44922150 DM |
32 | VISEntry |
33 | ||
34 | #define VISExitHalf \ | |
35 | VISExit | |
a00736e9 | 36 | |
f4da3628 DM |
37 | #define VISEntryHalfFast(fail_label) \ |
38 | rd %fprs, %o5; \ | |
39 | andcc %o5, FPRS_FEF, %g0; \ | |
40 | be,pt %icc, 297f; \ | |
41 | nop; \ | |
42 | ba,a,pt %xcc, fail_label; \ | |
43 | 297: wr %o5, FPRS_FEF, %fprs; | |
44 | ||
44922150 | 45 | #define VISExitHalfFast \ |
a00736e9 SR |
46 | wr %o5, 0, %fprs; |
47 | ||
48 | #ifndef __ASSEMBLY__ | |
49 | static inline void save_and_clear_fpu(void) { | |
50 | __asm__ __volatile__ ( | |
51 | " rd %%fprs, %%o5\n" | |
52 | " andcc %%o5, %0, %%g0\n" | |
53 | " be,pt %%icc, 299f\n" | |
54 | " sethi %%hi(298f), %%g7\n" | |
55 | " sethi %%hi(VISenter), %%g1\n" | |
56 | " jmpl %%g1 + %%lo(VISenter), %%g0\n" | |
57 | " or %%g7, %%lo(298f), %%g7\n" | |
58 | " 298: wr %%g0, 0, %%fprs\n" | |
59 | " 299:\n" | |
60 | " " : : "i" (FPRS_FEF|FPRS_DU) : | |
61 | "o5", "g1", "g2", "g3", "g7", "cc"); | |
62 | } | |
f05a6865 SR |
63 | |
64 | int vis_emul(struct pt_regs *, unsigned int); | |
a00736e9 SR |
65 | #endif |
66 | ||
67 | #endif /* _SPARC64_ASI_H */ |