1 | /* |
---|
2 | * spr.h -- Access to special purpose registers. |
---|
3 | * |
---|
4 | * Copyright (C) 1998 Gabriel Paubert, paubert@iram.es |
---|
5 | * |
---|
6 | * Modified to compile in RTEMS development environment |
---|
7 | * by Eric Valette |
---|
8 | * |
---|
9 | * Copyright (C) 1999 Eric Valette. valette@crf.canon.fr |
---|
10 | * |
---|
11 | * The license and distribution terms for this file may be |
---|
12 | * found in found in the file LICENSE in this distribution or at |
---|
13 | * http://www.OARcorp.com/rtems/license.html. |
---|
14 | * |
---|
15 | * $Id$ |
---|
16 | * |
---|
17 | */ |
---|
18 | |
---|
19 | |
---|
20 | #ifndef _PPC_SPR_H |
---|
21 | #define _PPC_SPR_H |
---|
22 | |
---|
23 | #include <libcpu/cpu.h> |
---|
24 | |
---|
25 | #define __MFSPR(reg, val) \ |
---|
26 | __asm__ __volatile__("mfspr %0,"#reg : "=r" (val)) |
---|
27 | |
---|
28 | #define __MTSPR(val, reg) \ |
---|
29 | __asm__ __volatile__("mtspr "#reg",%0" : : "r" (val)) |
---|
30 | |
---|
31 | |
---|
32 | #define SPR_RW(reg) \ |
---|
33 | static inline unsigned long _read_##reg(void) \ |
---|
34 | {\ |
---|
35 | unsigned long val;\ |
---|
36 | __MFSPR(reg, val);\ |
---|
37 | return val;\ |
---|
38 | }\ |
---|
39 | static inline void _write_##reg(unsigned long val)\ |
---|
40 | {\ |
---|
41 | __MTSPR(val,reg);\ |
---|
42 | return;\ |
---|
43 | } |
---|
44 | |
---|
45 | #define SPR_RO(reg) \ |
---|
46 | static inline unsigned long _read_##reg(void) \ |
---|
47 | {\ |
---|
48 | unsigned long val;\ |
---|
49 | __MFSPR(reg,val);\ |
---|
50 | return val;\ |
---|
51 | } |
---|
52 | |
---|
53 | static inline unsigned long _read_MSR(void) |
---|
54 | { |
---|
55 | unsigned long val; |
---|
56 | asm volatile("mfmsr %0" : "=r" (val)); |
---|
57 | return val; |
---|
58 | } |
---|
59 | |
---|
60 | static inline void _write_MSR(unsigned long val) |
---|
61 | { |
---|
62 | asm volatile("mtmsr %0" : : "r" (val)); |
---|
63 | return; |
---|
64 | } |
---|
65 | |
---|
66 | static inline unsigned long _read_SR(void * va) |
---|
67 | { |
---|
68 | unsigned long val; |
---|
69 | asm volatile("mfsrin %0,%1" : "=r" (val): "r" (va)); |
---|
70 | return val; |
---|
71 | } |
---|
72 | |
---|
73 | static inline void _write_SR(unsigned long val, void * va) |
---|
74 | { |
---|
75 | asm volatile("mtsrin %0,%1" : : "r"(val), "r" (va): "memory"); |
---|
76 | return; |
---|
77 | } |
---|
78 | |
---|
79 | |
---|
80 | #endif |
---|