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