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| 1 | +/* |
| 2 | + * regs.S -- standard MIPS register names from |
| 3 | + * newlib-1.8.2/libgloss/mips and adapted. |
| 4 | + * |
| 5 | + * Copyright (c) 1995 Cygnus Support |
| 6 | + * |
| 7 | + * The authors hereby grant permission to use, copy, modify, distribute, |
| 8 | + * and license this software and its documentation for any purpose, provided |
| 9 | + * that existing copyright notices are retained in all copies and that this |
| 10 | + * notice is included verbatim in any distributions. No written agreement, |
| 11 | + * license, or royalty fee is required for any of the authorized uses. |
| 12 | + * Modifications to this software may be copyrighted by their authors |
| 13 | + * and need not follow the licensing terms described here, provided that |
| 14 | + * the new terms are clearly indicated on the first page of each file where |
| 15 | + * they apply. |
| 16 | + */ |
| 17 | + |
| 18 | +/* Standard MIPS register names: */ |
| 19 | +#define zero $0 |
| 20 | +#define z0 $0 |
| 21 | +#define v0 $2 |
| 22 | +#define v1 $3 |
| 23 | +#define a0 $4 |
| 24 | +#define a1 $5 |
| 25 | +#define a2 $6 |
| 26 | +#define a3 $7 |
| 27 | +#define t0 $8 |
| 28 | +#define t1 $9 |
| 29 | +#define t2 $10 |
| 30 | +#define t3 $11 |
| 31 | +#define t4 $12 |
| 32 | +#define t5 $13 |
| 33 | +#define t6 $14 |
| 34 | +#define t7 $15 |
| 35 | +#define s0 $16 |
| 36 | +#define s1 $17 |
| 37 | +#define s2 $18 |
| 38 | +#define s3 $19 |
| 39 | +#define s4 $20 |
| 40 | +#define s5 $21 |
| 41 | +#define s6 $22 |
| 42 | +#define s7 $23 |
| 43 | +#define t8 $24 |
| 44 | +#define t9 $25 |
| 45 | +#define k0 $26 /* kernel private register 0 */ |
| 46 | +#define k1 $27 /* kernel private register 1 */ |
| 47 | +#define gp $28 /* global data pointer */ |
| 48 | +#define sp $29 /* stack-pointer */ |
| 49 | +#define fp $30 /* frame-pointer */ |
| 50 | +#define ra $31 /* return address */ |
| 51 | +#define pc $pc /* pc, used on mips16 */ |
| 52 | + |
| 53 | +#define fp0 $f0 |
| 54 | +#define fp1 $f1 |
| 55 | + |
| 56 | +#define WATCHDOG 0xBE000000 |
| 57 | + |
| 58 | +/* Useful memory constants: */ |
| 59 | +#define K0BASE 0x80000000 |
| 60 | +#ifndef __mips64 |
| 61 | + #define K1BASE 0xA0000000 |
| 62 | +#else |
| 63 | +#define K1BASE 0xFFFFFFFFA0000000LL |
| 64 | +#endif |
| 65 | + |
| 66 | +#define PHYS_TO_K1(a) ((unsigned)(a) | K1BASE) |
| 67 | + |
| 68 | +/* Standard Co-Processor 0 register numbers: */ |
| 69 | +#define C0_DCIC $7 /* debug & cache invalidate control */ |
| 70 | +#define C0_COUNT $9 /* Count Register */ |
| 71 | +#define C0_SR $12 /* Status Register */ |
| 72 | +#define C0_CAUSE $13 /* last exception description */ |
| 73 | +#define C0_EPC $14 /* Exception error address */ |
| 74 | +#define C0_CONFIG $16 /* CPU configuration */ |
| 75 | + |
| 76 | +/* Standard Status Register bitmasks: */ |
| 77 | +#define SR_CU0 0x10000000 |
| 78 | +#define SR_CU1 0x20000000 /* Mark CP1 as usable */ |
| 79 | +#define SR_FR 0x04000000 /* Enable MIPS III FP registers */ |
| 80 | +#define SR_BEV 0x00400000 /* Controls location of exception vectors */ |
| 81 | +#define SR_PE 0x00100000 /* Mark soft reset (clear parity error) */ |
| 82 | + |
| 83 | +/* defined differently for Mongoose5- we don't use these anymore */ |
| 84 | +#if UNUSED |
| 85 | +#define SR_KX 0x00000080 /* Kernel extended addressing enabled */ |
| 86 | +#define SR_SX 0x00000040 /* Supervisor extended addressing enabled */ |
| 87 | +#define SR_UX 0x00000020 /* User extended addressing enabled */ |
| 88 | +#endif |
| 89 | + |
| 90 | +/* R3000 */ |
| 91 | +#define SR_ISC 0x00010000 /* Isolate data cache */ |
| 92 | + |
| 93 | +/* Standard (R4000) cache operations. Taken from "MIPS R4000 |
| 94 | + Microprocessor User's Manual" 2nd edition: */ |
| 95 | + |
| 96 | +#define CACHE_I (0) /* primary instruction */ |
| 97 | +#define CACHE_D (1) /* primary data */ |
| 98 | +#define CACHE_SI (2) /* secondary instruction */ |
| 99 | +#define CACHE_SD (3) /* secondary data (or combined instruction/data) */ |
| 100 | + |
| 101 | +#define INDEX_INVALIDATE (0) /* also encodes WRITEBACK if CACHE_D or CACHE_SD */ |
| 102 | +#define INDEX_LOAD_TAG (1) |
| 103 | +#define INDEX_STORE_TAG (2) |
| 104 | +#define CREATE_DIRTY_EXCLUSIVE (3) /* CACHE_D and CACHE_SD only */ |
| 105 | +#define HIT_INVALIDATE (4) |
| 106 | +#define CACHE_FILL (5) /* CACHE_I only */ |
| 107 | +#define HIT_WRITEBACK_INVALIDATE (5) /* CACHE_D and CACHE_SD only */ |
| 108 | +#define HIT_WRITEBACK (6) /* CACHE_I, CACHE_D and CACHE_SD only */ |
| 109 | +#define HIT_SET_VIRTUAL (7) /* CACHE_SI and CACHE_SD only */ |
| 110 | + |
| 111 | +#define BUILD_CACHE_OP(o,c) (((o) << 2) | (c)) |
| 112 | + |
| 113 | +/* Individual cache operations: */ |
| 114 | +#define INDEX_INVALIDATE_I BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_I) |
| 115 | +#define INDEX_WRITEBACK_INVALIDATE_D BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_D) |
| 116 | +#define INDEX_INVALIDATE_SI BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_SI) |
| 117 | +#define INDEX_WRITEBACK_INVALIDATE_SD BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_SD) |
| 118 | + |
| 119 | +#define INDEX_LOAD_TAG_I BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_I) |
| 120 | +#define INDEX_LOAD_TAG_D BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_D) |
| 121 | +#define INDEX_LOAD_TAG_SI BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_SI) |
| 122 | +#define INDEX_LOAD_TAG_SD BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_SD) |
| 123 | + |
| 124 | +#define INDEX_STORE_TAG_I BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_I) |
| 125 | +#define INDEX_STORE_TAG_D BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_D) |
| 126 | +#define INDEX_STORE_TAG_SI BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_SI) |
| 127 | +#define INDEX_STORE_TAG_SD BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_SD) |
| 128 | + |
| 129 | +#define CREATE_DIRTY_EXCLUSIVE_D BUILD_CACHE_OP(CREATE_DIRTY_EXCLUSIVE,CACHE_D) |
| 130 | +#define CREATE_DIRTY_EXCLUSIVE_SD BUILD_CACHE_OP(CREATE_DIRTY_EXCLUSIVE,CACHE_SD) |
| 131 | + |
| 132 | +#define HIT_INVALIDATE_I BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_I) |
| 133 | +#define HIT_INVALIDATE_D BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_D) |
| 134 | +#define HIT_INVALIDATE_SI BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_SI) |
| 135 | +#define HIT_INVALIDATE_SD BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_SD) |
| 136 | + |
| 137 | +#define CACHE_FILL_I BUILD_CACHE_OP(CACHE_FILL,CACHE_I) |
| 138 | +#define HIT_WRITEBACK_INVALIDATE_D BUILD_CACHE_OP(HIT_WRITEBACK_INVALIDATE,CACHE_D) |
| 139 | +#define HIT_WRITEBACK_INVALIDATE_SD BUILD_CACHE_OP(HIT_WRITEBACK_INVALIDATE,CACHE_SD) |
| 140 | + |
| 141 | +#define HIT_WRITEBACK_I BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_I) |
| 142 | +#define HIT_WRITEBACK_D BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_D) |
| 143 | +#define HIT_WRITEBACK_SD BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_SD) |
| 144 | + |
| 145 | +#define HIT_SET_VIRTUAL_SI BUILD_CACHE_OP(HIT_SET_VIRTUAL,CACHE_SI) |
| 146 | +#define HIT_SET_VIRTUAL_SD BUILD_CACHE_OP(HIT_SET_VIRTUAL,CACHE_SD) |
| 147 | + |
| 148 | +/*> EOF regs.S <*/ |
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