1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _SPARC64_VISASM_H
3 #define _SPARC64_VISASM_H
4
5 /* visasm.h: FPU saving macros for VIS routin
6 *
7 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.
8 */
9
10 #include <asm/pstate.h>
11 #include <asm/ptrace.h>
12
13 /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xc
14
15 #define VISEntry
16 rd %fprs, %o5;
17 andcc %o5, (FPRS_FEF|FPRS_DU
18 be,pt %icc, 297f;
19 sethi %hi(297f), %g7;
20 sethi %hi(VISenter), %g1;
21 jmpl %g1 + %lo(VISenter), %
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, %xc
29 * Must preserve %o5 between VISEntryHalf and
30
31 #define VISEntryHalf
32 VISEntry
33
34 #define VISExitHalf
35 VISExit
36
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
45 #define VISExitHalfFast
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), %%
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",
62 }
63
64 int vis_emul(struct pt_regs *, unsigned int);
65 #endif
66
67 #endif /* _SPARC64_ASI_H */
68
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