uapi/asm/psrcompat.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 #ifndef _SPARC64_PSRCOMPAT_H
0003 #define _SPARC64_PSRCOMPAT_H
0004
0005 #include <asm/pstate.h>
0006
0007 /* Old 32-bit PSR fields for the compatibility conversion code. */
0008 #define PSR_CWP     0x0000001f         /* current window pointer     */
0009 #define PSR_ET      0x00000020         /* enable traps field         */
0010 #define PSR_PS      0x00000040         /* previous privilege level   */
0011 #define PSR_S       0x00000080         /* current privilege level    */
0012 #define PSR_PIL     0x00000f00         /* processor interrupt level  */
0013 #define PSR_EF      0x00001000         /* enable floating point      */
0014 #define PSR_EC      0x00002000         /* enable co-processor        */
0015 #define PSR_SYSCALL 0x00004000         /* inside of a syscall        */
0016 #define PSR_LE      0x00008000         /* SuperSparcII little-endian */
0017 #define PSR_ICC     0x00f00000         /* integer condition codes    */
0018 #define PSR_C       0x00100000         /* carry bit                  */
0019 #define PSR_V       0x00200000         /* overflow bit               */
0020 #define PSR_Z       0x00400000         /* zero bit                   */
0021 #define PSR_N       0x00800000         /* negative bit               */
0022 #define PSR_VERS    0x0f000000         /* cpu-version field          */
0023 #define PSR_IMPL    0xf0000000         /* cpu-implementation field   */
0024
0025 #define PSR_V8PLUS  0xff000000         /* fake impl/ver, meaning a 64bit CPU is present */
0026 #define PSR_XCC     0x000f0000         /* if PSR_V8PLUS, this is %xcc */
0027
0028 static inline unsigned int tstate_to_psr(unsigned long tstate)
0029 {
0030     return ((tstate & TSTATE_CWP)           |
0031         PSR_S                   |
0032         ((tstate & TSTATE_ICC) >> 12)       |
0033         ((tstate & TSTATE_XCC) >> 20)       |
0034         ((tstate & TSTATE_SYSCALL) ? PSR_SYSCALL : 0) |
0035         PSR_V8PLUS);
0036 }
0037
0038 static inline unsigned long psr_to_tstate_icc(unsigned int psr)
0039 {
0040     unsigned long tstate = ((unsigned long)(psr & PSR_ICC)) << 12;
0041     if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS)
0042         tstate |= ((unsigned long)(psr & PSR_XCC)) << 20;
0043     return tstate;
0044 }
0045
0046 #endif /* !(_SPARC64_PSRCOMPAT_H) */