projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 88278ca2 | 2 | /* |
| 1da177e4 LT |
3 | * psr.h: This file holds the macros for masking off various parts of |
| 4 | * the processor status register on the Sparc. This is valid | |
| 5 | * for Version 8. On the V9 this is renamed to the PSTATE | |
| 6 | * register and its members are accessed as fields like | |
| 7 | * PSTATE.PRIV for the current CPU privilege level. | |
| 8 | * | |
| 9 | * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) | |
| 10 | */ | |
| 1da177e4 LT |
11 | #ifndef __LINUX_SPARC_PSR_H |
| 12 | #define __LINUX_SPARC_PSR_H | |
| 13 | ||
| 54579826 | 14 | #include <uapi/asm/psr.h> |
| 7b372d65 | 15 | |
| 1da177e4 LT |
16 | |
| 17 | #ifndef __ASSEMBLY__ | |
| 18 | /* Get the %psr register. */ | |
| 3115624e | 19 | static inline unsigned int get_psr(void) |
| 1da177e4 LT |
20 | { |
| 21 | unsigned int psr; | |
| 22 | __asm__ __volatile__( | |
| 23 | "rd %%psr, %0\n\t" | |
| 24 | "nop\n\t" | |
| 25 | "nop\n\t" | |
| 26 | "nop\n\t" | |
| 27 | : "=r" (psr) | |
| 28 | : /* no inputs */ | |
| 29 | : "memory"); | |
| 30 | ||
| 31 | return psr; | |
| 32 | } | |
| 33 | ||
| 3115624e | 34 | static inline void put_psr(unsigned int new_psr) |
| 1da177e4 LT |
35 | { |
| 36 | __asm__ __volatile__( | |
| 37 | "wr %0, 0x0, %%psr\n\t" | |
| 38 | "nop\n\t" | |
| 39 | "nop\n\t" | |
| 40 | "nop\n\t" | |
| 41 | : /* no outputs */ | |
| 42 | : "r" (new_psr) | |
| 43 | : "memory", "cc"); | |
| 44 | } | |
| 45 | ||
| 46 | /* Get the %fsr register. Be careful, make sure the floating point | |
| 47 | * enable bit is set in the %psr when you execute this or you will | |
| 48 | * incur a trap. | |
| 49 | */ | |
| 50 | ||
| 51 | extern unsigned int fsr_storage; | |
| 52 | ||
| 3115624e | 53 | static inline unsigned int get_fsr(void) |
| 1da177e4 LT |
54 | { |
| 55 | unsigned int fsr = 0; | |
| 56 | ||
| 57 | __asm__ __volatile__( | |
| 58 | "st %%fsr, %1\n\t" | |
| 59 | "ld %1, %0\n\t" | |
| 60 | : "=r" (fsr) | |
| 61 | : "m" (fsr_storage)); | |
| 62 | ||
| 63 | return fsr; | |
| 64 | } | |
| 65 | ||
| 66 | #endif /* !(__ASSEMBLY__) */ | |
| 67 | ||
| 1da177e4 | 68 | #endif /* !(__LINUX_SPARC_PSR_H) */ |