1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _SPARC64_PSRCOMPAT_H
3 #define _SPARC64_PSRCOMPAT_H
4
5 #include <asm/pstate.h>
6
7 /* Old 32-bit PSR fields for the compatibility conversion code. */
8 #define PSR_CWP 0x0000001f /* current window pointer */
9 #define PSR_ET 0x00000020 /* enable traps field */
10 #define PSR_PS 0x00000040 /* previous privilege level */
11 #define PSR_S 0x00000080 /* current privilege level */
12 #define PSR_PIL 0x00000f00 /* processor interrupt level */
13 #define PSR_EF 0x00001000 /* enable floating point */
14 #define PSR_EC 0x00002000 /* enable co-processor */
15 #define PSR_SYSCALL 0x00004000 /* inside of a syscall */
16 #define PSR_LE 0x00008000 /* SuperSparcII little-endian */
17 #define PSR_ICC 0x00f00000 /* integer condition codes */
18 #define PSR_C 0x00100000 /* carry bit */
19 #define PSR_V 0x00200000 /* overflow bit */
20 #define PSR_Z 0x00400000 /* zero bit */
21 #define PSR_N 0x00800000 /* negative bit */
22 #define PSR_VERS 0x0f000000 /* cpu-version field */
23 #define PSR_IMPL 0xf0000000 /* cpu-implementation field */
24
25 #define PSR_V8PLUS 0xff000000 /* fake impl/ver, meaning a 64bit CPU is present */
26 #define PSR_XCC 0x000f0000 /* if PSR_V8PLUS, this is %xcc */
27
28 static inline unsigned int tstate_to_psr(unsigned long tstate)
29 {
30 return ((tstate & TSTATE_CWP) |
31 PSR_S |
32 ((tstate & TSTATE_ICC) >> 12) |
33 ((tstate & TSTATE_XCC) >> 20) |
34 ((tstate & TSTATE_SYSCALL) ? PSR_SYSCALL : 0) |
35 PSR_V8PLUS);
36 }
37
38 static inline unsigned long psr_to_tstate_icc(unsigned int psr)
39 {
40 unsigned long tstate = ((unsigned long)(psr & PSR_ICC)) << 12;
41 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS)
42 tstate |= ((unsigned long)(psr & PSR_XCC)) << 20;
43 return tstate;
44 }
45
46 #endif /* !(_SPARC64_PSRCOMPAT_H) */
47
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