| Stephen Rothwell | 127efeb | 2006-06-28 11:55:49 +1000 | [diff] [blame^] | 1 | /* |
| 2 | * This file contains miscellaneous low-level functions. |
| 3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) |
| 4 | * |
| 5 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) |
| 6 | * and Paul Mackerras. |
| 7 | * |
| 8 | * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) |
| 9 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version |
| 14 | * 2 of the License, or (at your option) any later version. |
| 15 | */ |
| 16 | #include <asm/ppc_asm.h> |
| 17 | |
| 18 | .text |
| 19 | |
| 20 | #ifdef CONFIG_PPC64 |
| 21 | #define IN_SYNC twi 0,r5,0; isync |
| 22 | #define EIEIO_32 |
| 23 | #define SYNC_64 sync |
| 24 | #else /* CONFIG_PPC32 */ |
| 25 | #define IN_SYNC |
| 26 | #define EIEIO_32 eieio |
| 27 | #define SYNC_64 |
| 28 | #endif |
| 29 | /* |
| 30 | * Returns (address we are running at) - (address we were linked at) |
| 31 | * for use before the text and data are mapped to KERNELBASE. |
| 32 | */ |
| 33 | |
| 34 | _GLOBAL(reloc_offset) |
| 35 | mflr r0 |
| 36 | bl 1f |
| 37 | 1: mflr r3 |
| 38 | LOAD_REG_IMMEDIATE(r4,1b) |
| 39 | subf r3,r4,r3 |
| 40 | mtlr r0 |
| 41 | blr |
| 42 | |
| 43 | /* |
| 44 | * add_reloc_offset(x) returns x + reloc_offset(). |
| 45 | */ |
| 46 | _GLOBAL(add_reloc_offset) |
| 47 | mflr r0 |
| 48 | bl 1f |
| 49 | 1: mflr r5 |
| 50 | LOAD_REG_IMMEDIATE(r4,1b) |
| 51 | subf r5,r4,r5 |
| 52 | add r3,r3,r5 |
| 53 | mtlr r0 |
| 54 | blr |
| 55 | |
| 56 | /* |
| 57 | * I/O string operations |
| 58 | * |
| 59 | * insb(port, buf, len) |
| 60 | * outsb(port, buf, len) |
| 61 | * insw(port, buf, len) |
| 62 | * outsw(port, buf, len) |
| 63 | * insl(port, buf, len) |
| 64 | * outsl(port, buf, len) |
| 65 | * insw_ns(port, buf, len) |
| 66 | * outsw_ns(port, buf, len) |
| 67 | * insl_ns(port, buf, len) |
| 68 | * outsl_ns(port, buf, len) |
| 69 | * |
| 70 | * The *_ns versions don't do byte-swapping. |
| 71 | */ |
| 72 | _GLOBAL(_insb) |
| 73 | cmpwi 0,r5,0 |
| 74 | mtctr r5 |
| 75 | subi r4,r4,1 |
| 76 | blelr- |
| 77 | 00: lbz r5,0(r3) |
| 78 | eieio |
| 79 | stbu r5,1(r4) |
| 80 | bdnz 00b |
| 81 | IN_SYNC |
| 82 | blr |
| 83 | |
| 84 | _GLOBAL(_outsb) |
| 85 | cmpwi 0,r5,0 |
| 86 | mtctr r5 |
| 87 | subi r4,r4,1 |
| 88 | blelr- |
| 89 | 00: lbzu r5,1(r4) |
| 90 | stb r5,0(r3) |
| 91 | EIEIO_32 |
| 92 | bdnz 00b |
| 93 | SYNC_64 |
| 94 | blr |
| 95 | |
| 96 | _GLOBAL(_insw) |
| 97 | cmpwi 0,r5,0 |
| 98 | mtctr r5 |
| 99 | subi r4,r4,2 |
| 100 | blelr- |
| 101 | 00: lhbrx r5,0,r3 |
| 102 | eieio |
| 103 | sthu r5,2(r4) |
| 104 | bdnz 00b |
| 105 | IN_SYNC |
| 106 | blr |
| 107 | |
| 108 | _GLOBAL(_outsw) |
| 109 | cmpwi 0,r5,0 |
| 110 | mtctr r5 |
| 111 | subi r4,r4,2 |
| 112 | blelr- |
| 113 | 00: lhzu r5,2(r4) |
| 114 | EIEIO_32 |
| 115 | sthbrx r5,0,r3 |
| 116 | bdnz 00b |
| 117 | SYNC_64 |
| 118 | blr |
| 119 | |
| 120 | _GLOBAL(_insl) |
| 121 | cmpwi 0,r5,0 |
| 122 | mtctr r5 |
| 123 | subi r4,r4,4 |
| 124 | blelr- |
| 125 | 00: lwbrx r5,0,r3 |
| 126 | eieio |
| 127 | stwu r5,4(r4) |
| 128 | bdnz 00b |
| 129 | IN_SYNC |
| 130 | blr |
| 131 | |
| 132 | _GLOBAL(_outsl) |
| 133 | cmpwi 0,r5,0 |
| 134 | mtctr r5 |
| 135 | subi r4,r4,4 |
| 136 | blelr- |
| 137 | 00: lwzu r5,4(r4) |
| 138 | stwbrx r5,0,r3 |
| 139 | EIEIO_32 |
| 140 | bdnz 00b |
| 141 | SYNC_64 |
| 142 | blr |
| 143 | |
| 144 | #ifdef CONFIG_PPC32 |
| 145 | _GLOBAL(__ide_mm_insw) |
| 146 | #endif |
| 147 | _GLOBAL(_insw_ns) |
| 148 | cmpwi 0,r5,0 |
| 149 | mtctr r5 |
| 150 | subi r4,r4,2 |
| 151 | blelr- |
| 152 | 00: lhz r5,0(r3) |
| 153 | eieio |
| 154 | sthu r5,2(r4) |
| 155 | bdnz 00b |
| 156 | IN_SYNC |
| 157 | blr |
| 158 | |
| 159 | #ifdef CONFIG_PPC32 |
| 160 | _GLOBAL(__ide_mm_outsw) |
| 161 | #endif |
| 162 | _GLOBAL(_outsw_ns) |
| 163 | cmpwi 0,r5,0 |
| 164 | mtctr r5 |
| 165 | subi r4,r4,2 |
| 166 | blelr- |
| 167 | 00: lhzu r5,2(r4) |
| 168 | sth r5,0(r3) |
| 169 | EIEIO_32 |
| 170 | bdnz 00b |
| 171 | SYNC_64 |
| 172 | blr |
| 173 | |
| 174 | #ifdef CONFIG_PPC32 |
| 175 | _GLOBAL(__ide_mm_insl) |
| 176 | #endif |
| 177 | _GLOBAL(_insl_ns) |
| 178 | cmpwi 0,r5,0 |
| 179 | mtctr r5 |
| 180 | subi r4,r4,4 |
| 181 | blelr- |
| 182 | 00: lwz r5,0(r3) |
| 183 | eieio |
| 184 | stwu r5,4(r4) |
| 185 | bdnz 00b |
| 186 | IN_SYNC |
| 187 | blr |
| 188 | |
| 189 | #ifdef CONFIG_PPC32 |
| 190 | _GLOBAL(__ide_mm_outsl) |
| 191 | #endif |
| 192 | _GLOBAL(_outsl_ns) |
| 193 | cmpwi 0,r5,0 |
| 194 | mtctr r5 |
| 195 | subi r4,r4,4 |
| 196 | blelr- |
| 197 | 00: lwzu r5,4(r4) |
| 198 | stw r5,0(r3) |
| 199 | EIEIO_32 |
| 200 | bdnz 00b |
| 201 | SYNC_64 |
| 202 | blr |
| 203 | |