projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |