diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc/psr.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-sparc/psr.h')
-rw-r--r-- | include/asm-sparc/psr.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/include/asm-sparc/psr.h b/include/asm-sparc/psr.h new file mode 100644 index 000000000000..9778b8c8b15b --- /dev/null +++ b/include/asm-sparc/psr.h | |||
@@ -0,0 +1,92 @@ | |||
1 | /* $Id: psr.h,v 1.15 1997/10/04 08:54:22 ecd Exp $ | ||
2 | * psr.h: This file holds the macros for masking off various parts of | ||
3 | * the processor status register on the Sparc. This is valid | ||
4 | * for Version 8. On the V9 this is renamed to the PSTATE | ||
5 | * register and its members are accessed as fields like | ||
6 | * PSTATE.PRIV for the current CPU privilege level. | ||
7 | * | ||
8 | * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) | ||
9 | */ | ||
10 | |||
11 | #ifndef __LINUX_SPARC_PSR_H | ||
12 | #define __LINUX_SPARC_PSR_H | ||
13 | |||
14 | /* The Sparc PSR fields are laid out as the following: | ||
15 | * | ||
16 | * ------------------------------------------------------------------------ | ||
17 | * | impl | vers | icc | resv | EC | EF | PIL | S | PS | ET | CWP | | ||
18 | * | 31-28 | 27-24 | 23-20 | 19-14 | 13 | 12 | 11-8 | 7 | 6 | 5 | 4-0 | | ||
19 | * ------------------------------------------------------------------------ | ||
20 | */ | ||
21 | #define PSR_CWP 0x0000001f /* current window pointer */ | ||
22 | #define PSR_ET 0x00000020 /* enable traps field */ | ||
23 | #define PSR_PS 0x00000040 /* previous privilege level */ | ||
24 | #define PSR_S 0x00000080 /* current privilege level */ | ||
25 | #define PSR_PIL 0x00000f00 /* processor interrupt level */ | ||
26 | #define PSR_EF 0x00001000 /* enable floating point */ | ||
27 | #define PSR_EC 0x00002000 /* enable co-processor */ | ||
28 | #define PSR_LE 0x00008000 /* SuperSparcII little-endian */ | ||
29 | #define PSR_ICC 0x00f00000 /* integer condition codes */ | ||
30 | #define PSR_C 0x00100000 /* carry bit */ | ||
31 | #define PSR_V 0x00200000 /* overflow bit */ | ||
32 | #define PSR_Z 0x00400000 /* zero bit */ | ||
33 | #define PSR_N 0x00800000 /* negative bit */ | ||
34 | #define PSR_VERS 0x0f000000 /* cpu-version field */ | ||
35 | #define PSR_IMPL 0xf0000000 /* cpu-implementation field */ | ||
36 | |||
37 | #ifdef __KERNEL__ | ||
38 | |||
39 | #ifndef __ASSEMBLY__ | ||
40 | /* Get the %psr register. */ | ||
41 | extern __inline__ unsigned int get_psr(void) | ||
42 | { | ||
43 | unsigned int psr; | ||
44 | __asm__ __volatile__( | ||
45 | "rd %%psr, %0\n\t" | ||
46 | "nop\n\t" | ||
47 | "nop\n\t" | ||
48 | "nop\n\t" | ||
49 | : "=r" (psr) | ||
50 | : /* no inputs */ | ||
51 | : "memory"); | ||
52 | |||
53 | return psr; | ||
54 | } | ||
55 | |||
56 | extern __inline__ void put_psr(unsigned int new_psr) | ||
57 | { | ||
58 | __asm__ __volatile__( | ||
59 | "wr %0, 0x0, %%psr\n\t" | ||
60 | "nop\n\t" | ||
61 | "nop\n\t" | ||
62 | "nop\n\t" | ||
63 | : /* no outputs */ | ||
64 | : "r" (new_psr) | ||
65 | : "memory", "cc"); | ||
66 | } | ||
67 | |||
68 | /* Get the %fsr register. Be careful, make sure the floating point | ||
69 | * enable bit is set in the %psr when you execute this or you will | ||
70 | * incur a trap. | ||
71 | */ | ||
72 | |||
73 | extern unsigned int fsr_storage; | ||
74 | |||
75 | extern __inline__ unsigned int get_fsr(void) | ||
76 | { | ||
77 | unsigned int fsr = 0; | ||
78 | |||
79 | __asm__ __volatile__( | ||
80 | "st %%fsr, %1\n\t" | ||
81 | "ld %1, %0\n\t" | ||
82 | : "=r" (fsr) | ||
83 | : "m" (fsr_storage)); | ||
84 | |||
85 | return fsr; | ||
86 | } | ||
87 | |||
88 | #endif /* !(__ASSEMBLY__) */ | ||
89 | |||
90 | #endif /* (__KERNEL__) */ | ||
91 | |||
92 | #endif /* !(__LINUX_SPARC_PSR_H) */ | ||