| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: psrcompat.h,v 1.5 1998/10/06 09:28:39 jj Exp $ */ |
| 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_LE 0x00008000 /* SuperSparcII little-endian */ |
| 16 | #define PSR_ICC 0x00f00000 /* integer condition codes */ |
| 17 | #define PSR_C 0x00100000 /* carry bit */ |
| 18 | #define PSR_V 0x00200000 /* overflow bit */ |
| 19 | #define PSR_Z 0x00400000 /* zero bit */ |
| 20 | #define PSR_N 0x00800000 /* negative bit */ |
| 21 | #define PSR_VERS 0x0f000000 /* cpu-version field */ |
| 22 | #define PSR_IMPL 0xf0000000 /* cpu-implementation field */ |
| 23 | |
| 24 | #define PSR_V8PLUS 0xff000000 /* fake impl/ver, meaning a 64bit CPU is present */ |
| 25 | #define PSR_XCC 0x000f0000 /* if PSR_V8PLUS, this is %xcc */ |
| 26 | |
| 27 | static inline unsigned int tstate_to_psr(unsigned long tstate) |
| 28 | { |
| 29 | return ((tstate & TSTATE_CWP) | |
| 30 | PSR_S | |
| 31 | ((tstate & TSTATE_ICC) >> 12) | |
| 32 | ((tstate & TSTATE_XCC) >> 20) | |
| 33 | PSR_V8PLUS); |
| 34 | } |
| 35 | |
| 36 | static inline unsigned long psr_to_tstate_icc(unsigned int psr) |
| 37 | { |
| 38 | unsigned long tstate = ((unsigned long)(psr & PSR_ICC)) << 12; |
| 39 | if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) |
| 40 | tstate |= ((unsigned long)(psr & PSR_XCC)) << 20; |
| 41 | return tstate; |
| 42 | } |
| 43 | |
| 44 | #endif /* !(_SPARC64_PSRCOMPAT_H) */ |