root/arch/sparc/include/uapi/asm/psrcompat.h

INCLUDED FROM

DEFINITIONS

1. tstate_to_psr
2. psr_to_tstate_icc

   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) */