[abd9401] | 1 | /* |
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| 2 | * spr.h -- Access to special purpose registers. |
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| 3 | * |
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| 4 | * Copyright (C) 1998 Gabriel Paubert, paubert@iram.es |
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| 5 | * |
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| 6 | * Modified to compile in RTEMS development environment |
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| 7 | * by Eric Valette |
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| 8 | * |
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| 9 | * Copyright (C) 1999 Eric Valette. valette@crf.canon.fr |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in found in the file LICENSE in this distribution or at |
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| 13 | * http://www.OARcorp.com/rtems/license.html. |
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| 14 | * |
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| 15 | * $Id$ |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | |
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| 20 | #ifndef _PPC_SPR_H |
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| 21 | #define _PPC_SPR_H |
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| 22 | |
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| 23 | #include <libcpu/cpu.h> |
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| 24 | |
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| 25 | #define __MFSPR(reg, val) \ |
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| 26 | __asm__ __volatile__("mfspr %0,"#reg : "=r" (val)) |
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| 27 | |
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| 28 | #define __MTSPR(val, reg) \ |
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| 29 | __asm__ __volatile__("mtspr "#reg",%0" : : "r" (val)) |
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| 30 | |
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| 31 | |
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| 32 | #define SPR_RW(reg) \ |
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| 33 | static inline unsigned long _read_##reg(void) \ |
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| 34 | {\ |
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| 35 | unsigned long val;\ |
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| 36 | __MFSPR(reg, val);\ |
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| 37 | return val;\ |
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| 38 | }\ |
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| 39 | static inline void _write_##reg(unsigned long val)\ |
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| 40 | {\ |
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| 41 | __MTSPR(val,reg);\ |
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| 42 | return;\ |
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| 43 | } |
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| 44 | |
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| 45 | #define SPR_RO(reg) \ |
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| 46 | static inline unsigned long _read_##reg(void) \ |
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| 47 | {\ |
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| 48 | unsigned long val;\ |
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| 49 | __MFSPR(reg,val);\ |
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| 50 | return val;\ |
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| 51 | } |
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| 52 | |
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| 53 | static inline unsigned long _read_MSR(void) |
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| 54 | { |
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| 55 | unsigned long val; |
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| 56 | asm volatile("mfmsr %0" : "=r" (val)); |
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| 57 | return val; |
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| 58 | } |
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| 59 | |
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| 60 | static inline void _write_MSR(unsigned long val) |
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| 61 | { |
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| 62 | asm volatile("mtmsr %0" : : "r" (val)); |
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| 63 | return; |
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| 64 | } |
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| 65 | |
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| 66 | static inline unsigned long _read_SR(void * va) |
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| 67 | { |
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| 68 | unsigned long val; |
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| 69 | asm volatile("mfsrin %0,%1" : "=r" (val): "r" (va)); |
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| 70 | return val; |
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| 71 | } |
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| 72 | |
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| 73 | static inline void _write_SR(unsigned long val, void * va) |
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| 74 | { |
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| 75 | asm volatile("mtsrin %0,%1" : : "r"(val), "r" (va): "memory"); |
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| 76 | return; |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | #endif |
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