| Sam Ravnborg | a00736e | 2008-06-19 20:26:19 +0200 | [diff] [blame] | 1 | #ifndef _SPARC64_VISASM_H |
| 2 | #define _SPARC64_VISASM_H |
| 3 | |
| 4 | /* visasm.h: FPU saving macros for VIS routines |
| 5 | * |
| 6 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) |
| 7 | */ |
| 8 | |
| 9 | #include <asm/pstate.h> |
| 10 | #include <asm/ptrace.h> |
| 11 | |
| 12 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ |
| 13 | |
| 14 | #define VISEntry \ |
| 15 | rd %fprs, %o5; \ |
| 16 | andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ |
| 17 | be,pt %icc, 297f; \ |
| 18 | sethi %hi(297f), %g7; \ |
| 19 | sethi %hi(VISenter), %g1; \ |
| 20 | jmpl %g1 + %lo(VISenter), %g0; \ |
| 21 | or %g7, %lo(297f), %g7; \ |
| 22 | 297: wr %g0, FPRS_FEF, %fprs; \ |
| 23 | |
| 24 | #define VISExit \ |
| 25 | wr %g0, 0, %fprs; |
| 26 | |
| 27 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. |
| 28 | * Must preserve %o5 between VISEntryHalf and VISExitHalf */ |
| 29 | |
| 30 | #define VISEntryHalf \ |
| David S. Miller | 4492215 | 2015-08-06 19:13:25 -0700 | [diff] [blame^] | 31 | VISEntry |
| 32 | |
| 33 | #define VISExitHalf \ |
| 34 | VISExit |
| Sam Ravnborg | a00736e | 2008-06-19 20:26:19 +0200 | [diff] [blame] | 35 | |
| David S. Miller | f4da362 | 2014-10-14 19:37:58 -0700 | [diff] [blame] | 36 | #define VISEntryHalfFast(fail_label) \ |
| 37 | rd %fprs, %o5; \ |
| 38 | andcc %o5, FPRS_FEF, %g0; \ |
| 39 | be,pt %icc, 297f; \ |
| 40 | nop; \ |
| 41 | ba,a,pt %xcc, fail_label; \ |
| 42 | 297: wr %o5, FPRS_FEF, %fprs; |
| 43 | |
| David S. Miller | 4492215 | 2015-08-06 19:13:25 -0700 | [diff] [blame^] | 44 | #define VISExitHalfFast \ |
| Sam Ravnborg | a00736e | 2008-06-19 20:26:19 +0200 | [diff] [blame] | 45 | wr %o5, 0, %fprs; |
| 46 | |
| 47 | #ifndef __ASSEMBLY__ |
| 48 | static inline void save_and_clear_fpu(void) { |
| 49 | __asm__ __volatile__ ( |
| 50 | " rd %%fprs, %%o5\n" |
| 51 | " andcc %%o5, %0, %%g0\n" |
| 52 | " be,pt %%icc, 299f\n" |
| 53 | " sethi %%hi(298f), %%g7\n" |
| 54 | " sethi %%hi(VISenter), %%g1\n" |
| 55 | " jmpl %%g1 + %%lo(VISenter), %%g0\n" |
| 56 | " or %%g7, %%lo(298f), %%g7\n" |
| 57 | " 298: wr %%g0, 0, %%fprs\n" |
| 58 | " 299:\n" |
| 59 | " " : : "i" (FPRS_FEF|FPRS_DU) : |
| 60 | "o5", "g1", "g2", "g3", "g7", "cc"); |
| 61 | } |
| Sam Ravnborg | f05a686 | 2014-05-16 23:25:50 +0200 | [diff] [blame] | 62 | |
| 63 | int vis_emul(struct pt_regs *, unsigned int); |
| Sam Ravnborg | a00736e | 2008-06-19 20:26:19 +0200 | [diff] [blame] | 64 | #endif |
| 65 | |
| 66 | #endif /* _SPARC64_ASI_H */ |