| 1 |
cebix |
1.1 |
/* |
| 2 |
|
|
* asm_linux.S - Assembly routines |
| 3 |
|
|
* |
| 4 |
|
|
* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
| 5 |
|
|
* |
| 6 |
|
|
* This program is free software; you can redistribute it and/or modify |
| 7 |
|
|
* it under the terms of the GNU General Public License as published by |
| 8 |
|
|
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
|
|
* (at your option) any later version. |
| 10 |
|
|
* |
| 11 |
|
|
* This program is distributed in the hope that it will be useful, |
| 12 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
|
|
* GNU General Public License for more details. |
| 15 |
|
|
* |
| 16 |
|
|
* You should have received a copy of the GNU General Public License |
| 17 |
|
|
* along with this program; if not, write to the Free Software |
| 18 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
|
|
*/ |
| 20 |
|
|
|
| 21 |
|
|
#include <ppc_asm.tmpl> |
| 22 |
|
|
#include <xlowmem.h> |
| 23 |
|
|
|
| 24 |
|
|
#define SAVE_FP_EXEC_68K 1 |
| 25 |
|
|
|
| 26 |
|
|
|
| 27 |
|
|
/* |
| 28 |
|
|
* void *get_toc(void) - Get TOC pointer (small data pointer r13 under Linux) |
| 29 |
|
|
*/ |
| 30 |
|
|
|
| 31 |
|
|
.globl get_toc |
| 32 |
|
|
get_toc: |
| 33 |
|
|
mr r3,r13 |
| 34 |
|
|
blr |
| 35 |
|
|
|
| 36 |
|
|
|
| 37 |
|
|
/* |
| 38 |
|
|
* void *get_sp(void) - Get stack pointer |
| 39 |
|
|
*/ |
| 40 |
|
|
|
| 41 |
|
|
.globl get_sp |
| 42 |
|
|
get_sp: |
| 43 |
|
|
mr r3,r1 |
| 44 |
|
|
blr |
| 45 |
|
|
|
| 46 |
|
|
|
| 47 |
|
|
/* |
| 48 |
|
|
* void set_r2(uint32 val {r3}) - Set r2 |
| 49 |
|
|
*/ |
| 50 |
|
|
|
| 51 |
|
|
.globl set_r2 |
| 52 |
|
|
set_r2: |
| 53 |
|
|
mr r2,r3 |
| 54 |
|
|
blr |
| 55 |
|
|
|
| 56 |
|
|
|
| 57 |
|
|
/* |
| 58 |
|
|
* void flush_icache_range(void *start {r3}, void *end {r3}) - Flush D and I cache |
| 59 |
|
|
*/ |
| 60 |
|
|
|
| 61 |
|
|
CACHE_LINE_SIZE = 32 |
| 62 |
|
|
LG_CACHE_LINE_SIZE = 5 |
| 63 |
|
|
|
| 64 |
|
|
.globl flush_icache_range |
| 65 |
|
|
flush_icache_range: |
| 66 |
|
|
li r5,CACHE_LINE_SIZE-1 |
| 67 |
|
|
andc r3,r3,r5 |
| 68 |
|
|
subf r4,r3,r4 |
| 69 |
|
|
add r4,r4,r5 |
| 70 |
|
|
srwi. r4,r4,LG_CACHE_LINE_SIZE |
| 71 |
|
|
beqlr |
| 72 |
|
|
mtctr r4 |
| 73 |
|
|
mr r6,r3 |
| 74 |
|
|
1: dcbst 0,r3 |
| 75 |
|
|
addi r3,r3,CACHE_LINE_SIZE |
| 76 |
|
|
bdnz 1b |
| 77 |
|
|
sync /* wait for dcbst's to get to ram */ |
| 78 |
|
|
mtctr r4 |
| 79 |
|
|
2: icbi 0,r6 |
| 80 |
|
|
addi r6,r6,CACHE_LINE_SIZE |
| 81 |
|
|
bdnz 2b |
| 82 |
|
|
sync |
| 83 |
|
|
isync |
| 84 |
|
|
blr |
| 85 |
|
|
|
| 86 |
|
|
|
| 87 |
|
|
/* |
| 88 |
|
|
* long atomic_add(long *var{r3}, long add{r4}) - Atomic add operation |
| 89 |
|
|
* long atomic_and(long *var{r3}, long and{r4}) - Atomic and operation |
| 90 |
|
|
* long atomic_or(long *var{r3}, long or{r4}) - Atomic or operation |
| 91 |
|
|
* int test_and_set(int *var{r3}, int val{r4}) - Atomic test-and-set |
| 92 |
|
|
*/ |
| 93 |
|
|
|
| 94 |
|
|
.globl atomic_add |
| 95 |
|
|
atomic_add: |
| 96 |
|
|
10: dcbf r0,r3 |
| 97 |
|
|
sync |
| 98 |
|
|
ori r0,r0,1 |
| 99 |
|
|
ori r0,r0,1 |
| 100 |
|
|
ori r0,r0,1 |
| 101 |
|
|
ori r0,r0,1 |
| 102 |
|
|
ori r0,r0,1 |
| 103 |
|
|
ori r0,r0,1 |
| 104 |
|
|
isync |
| 105 |
|
|
lwarx r5,r0,r3 |
| 106 |
|
|
add r0,r4,r5 |
| 107 |
|
|
stwcx. r0,r0,r3 |
| 108 |
|
|
bne- 10b |
| 109 |
|
|
mr r3,r5 |
| 110 |
|
|
isync |
| 111 |
|
|
blr |
| 112 |
|
|
|
| 113 |
|
|
.globl atomic_and |
| 114 |
|
|
atomic_and: |
| 115 |
|
|
10: dcbf r0,r3 |
| 116 |
|
|
sync |
| 117 |
|
|
ori r0,r0,1 |
| 118 |
|
|
ori r0,r0,1 |
| 119 |
|
|
ori r0,r0,1 |
| 120 |
|
|
ori r0,r0,1 |
| 121 |
|
|
ori r0,r0,1 |
| 122 |
|
|
ori r0,r0,1 |
| 123 |
|
|
isync |
| 124 |
|
|
lwarx r5,r0,r3 |
| 125 |
|
|
and r0,r4,r5 |
| 126 |
|
|
stwcx. r0,r0,r3 |
| 127 |
|
|
bne- 10b |
| 128 |
|
|
mr r3,r5 |
| 129 |
|
|
isync |
| 130 |
|
|
blr |
| 131 |
|
|
|
| 132 |
|
|
.globl atomic_or |
| 133 |
|
|
atomic_or: |
| 134 |
|
|
10: dcbf r0,r3 |
| 135 |
|
|
sync |
| 136 |
|
|
ori r0,r0,1 |
| 137 |
|
|
ori r0,r0,1 |
| 138 |
|
|
ori r0,r0,1 |
| 139 |
|
|
ori r0,r0,1 |
| 140 |
|
|
ori r0,r0,1 |
| 141 |
|
|
ori r0,r0,1 |
| 142 |
|
|
isync |
| 143 |
|
|
lwarx r5,r0,r3 |
| 144 |
|
|
or r0,r4,r5 |
| 145 |
|
|
stwcx. r0,r0,r3 |
| 146 |
|
|
bne- 10b |
| 147 |
|
|
mr r3,r5 |
| 148 |
|
|
isync |
| 149 |
|
|
blr |
| 150 |
|
|
|
| 151 |
|
|
.globl test_and_set |
| 152 |
|
|
test_and_set: |
| 153 |
|
|
10: dcbf r0,r3 |
| 154 |
|
|
sync |
| 155 |
|
|
ori r0,r0,1 |
| 156 |
|
|
ori r0,r0,1 |
| 157 |
|
|
ori r0,r0,1 |
| 158 |
|
|
ori r0,r0,1 |
| 159 |
|
|
ori r0,r0,1 |
| 160 |
|
|
ori r0,r0,1 |
| 161 |
|
|
isync |
| 162 |
|
|
lwarx r5,r0,r3 |
| 163 |
|
|
cmpi 0,r5,0x0000 |
| 164 |
|
|
beq 1f |
| 165 |
|
|
stwcx. r4,r0,r3 |
| 166 |
|
|
bne- 10b |
| 167 |
|
|
1: isync |
| 168 |
|
|
mr r3,r5 |
| 169 |
|
|
blr |
| 170 |
|
|
|
| 171 |
|
|
|
| 172 |
|
|
/* |
| 173 |
|
|
* void quit_emulator(void) - Jump to XLM_EMUL_RETURN_PROC |
| 174 |
|
|
*/ |
| 175 |
|
|
|
| 176 |
|
|
.globl quit_emulator |
| 177 |
|
|
quit_emulator: |
| 178 |
|
|
lwz r0,XLM_EMUL_RETURN_PROC(r0) |
| 179 |
|
|
mtlr r0 |
| 180 |
|
|
blr |
| 181 |
|
|
|
| 182 |
|
|
|
| 183 |
|
|
/* |
| 184 |
|
|
* void jump_to_rom(uint32 entry {r3}, uint32 emulator_data {r4}) - Jump to Mac ROM |
| 185 |
|
|
*/ |
| 186 |
|
|
|
| 187 |
|
|
.globl jump_to_rom |
| 188 |
|
|
jump_to_rom: |
| 189 |
|
|
// Create stack frame |
| 190 |
|
|
mflr r0 |
| 191 |
|
|
stw r0,4(r1) |
| 192 |
|
|
stwu r1,-(20+19*4+18*8)(r1) // maintain 16 byte alignment |
| 193 |
|
|
|
| 194 |
|
|
// Save PowerPC registers |
| 195 |
|
|
stmw r13,20(r1) |
| 196 |
|
|
stfd f14,20+19*4+0*8(r1) |
| 197 |
|
|
stfd f15,20+19*4+1*8(r1) |
| 198 |
|
|
stfd f16,20+19*4+2*8(r1) |
| 199 |
|
|
stfd f17,20+19*4+3*8(r1) |
| 200 |
|
|
stfd f18,20+19*4+4*8(r1) |
| 201 |
|
|
stfd f19,20+19*4+5*8(r1) |
| 202 |
|
|
stfd f20,20+19*4+6*8(r1) |
| 203 |
|
|
stfd f21,20+19*4+7*8(r1) |
| 204 |
|
|
stfd f22,20+19*4+8*8(r1) |
| 205 |
|
|
stfd f23,20+19*4+9*8(r1) |
| 206 |
|
|
stfd f24,20+19*4+10*8(r1) |
| 207 |
|
|
stfd f25,20+19*4+11*8(r1) |
| 208 |
|
|
stfd f26,20+19*4+12*8(r1) |
| 209 |
|
|
stfd f27,20+19*4+13*8(r1) |
| 210 |
|
|
stfd f28,20+19*4+14*8(r1) |
| 211 |
|
|
stfd f29,20+19*4+15*8(r1) |
| 212 |
|
|
stfd f30,20+19*4+16*8(r1) |
| 213 |
|
|
stfd f31,20+19*4+17*8(r1) |
| 214 |
|
|
|
| 215 |
|
|
// Move entry address to ctr |
| 216 |
|
|
mtctr r3 |
| 217 |
|
|
|
| 218 |
|
|
// Skip over EMUL_RETURN routine and get its address |
| 219 |
|
|
bl 1f |
| 220 |
|
|
|
| 221 |
|
|
|
| 222 |
|
|
/* |
| 223 |
|
|
* EMUL_RETURN: Returned from emulator |
| 224 |
|
|
*/ |
| 225 |
|
|
|
| 226 |
|
|
// Restore PowerPC registers |
| 227 |
|
|
lwz r1,XLM_EMUL_RETURN_STACK(r0) |
| 228 |
|
|
lmw r13,20(r1) |
| 229 |
|
|
lfd f14,20+19*4+0*8(r1) |
| 230 |
|
|
lfd f15,20+19*4+1*8(r1) |
| 231 |
|
|
lfd f16,20+19*4+2*8(r1) |
| 232 |
|
|
lfd f17,20+19*4+3*8(r1) |
| 233 |
|
|
lfd f18,20+19*4+4*8(r1) |
| 234 |
|
|
lfd f19,20+19*4+5*8(r1) |
| 235 |
|
|
lfd f20,20+19*4+6*8(r1) |
| 236 |
|
|
lfd f21,20+19*4+7*8(r1) |
| 237 |
|
|
lfd f22,20+19*4+8*8(r1) |
| 238 |
|
|
lfd f23,20+19*4+9*8(r1) |
| 239 |
|
|
lfd f24,20+19*4+10*8(r1) |
| 240 |
|
|
lfd f25,20+19*4+11*8(r1) |
| 241 |
|
|
lfd f26,20+19*4+12*8(r1) |
| 242 |
|
|
lfd f27,20+19*4+13*8(r1) |
| 243 |
|
|
lfd f28,20+19*4+14*8(r1) |
| 244 |
|
|
lfd f29,20+19*4+15*8(r1) |
| 245 |
|
|
lfd f30,20+19*4+16*8(r1) |
| 246 |
|
|
lfd f31,20+19*4+17*8(r1) |
| 247 |
|
|
|
| 248 |
|
|
// Exiting from 68k emulator |
| 249 |
|
|
li r0,1 |
| 250 |
|
|
stw r0,XLM_IRQ_NEST(r0) |
| 251 |
|
|
li r0,MODE_NATIVE |
| 252 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 253 |
|
|
|
| 254 |
|
|
// Return to caller of jump_to_rom() |
| 255 |
|
|
lwz r0,20+19*4+18*8+4(r1) |
| 256 |
|
|
mtlr r0 |
| 257 |
|
|
addi r1,r1,20+19*4+18*8 |
| 258 |
|
|
blr |
| 259 |
|
|
|
| 260 |
|
|
|
| 261 |
|
|
// Save address of EMUL_RETURN routine for 68k emulator patch |
| 262 |
|
|
1: mflr r0 |
| 263 |
|
|
stw r0,XLM_EMUL_RETURN_PROC(r0) |
| 264 |
|
|
|
| 265 |
|
|
// Skip over EXEC_RETURN routine and get its address |
| 266 |
|
|
bl 2f |
| 267 |
|
|
|
| 268 |
|
|
|
| 269 |
|
|
/* |
| 270 |
|
|
* EXEC_RETURN: Returned from 68k routine executed with Execute68k() |
| 271 |
|
|
*/ |
| 272 |
|
|
|
| 273 |
|
|
// Save r25 (contains current 68k interrupt level) |
| 274 |
|
|
stw r25,XLM_68K_R25(r0) |
| 275 |
|
|
|
| 276 |
|
|
// Reentering EMUL_OP mode |
| 277 |
|
|
li r0,MODE_EMUL_OP |
| 278 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 279 |
|
|
|
| 280 |
|
|
// Save 68k registers |
| 281 |
|
|
lwz r4,48(r1) // Pointer to M68kRegisters |
| 282 |
|
|
stw r8,0*4(r4) // d[0]...d[7] |
| 283 |
|
|
stw r9,1*4(r4) |
| 284 |
|
|
stw r10,2*4(r4) |
| 285 |
|
|
stw r11,3*4(r4) |
| 286 |
|
|
stw r12,4*4(r4) |
| 287 |
|
|
stw r13,5*4(r4) |
| 288 |
|
|
stw r14,6*4(r4) |
| 289 |
|
|
stw r15,7*4(r4) |
| 290 |
|
|
stw r16,8*4(r4) // a[0]..a[6] |
| 291 |
|
|
stw r17,9*4(r4) |
| 292 |
|
|
stw r18,10*4(r4) |
| 293 |
|
|
stw r19,11*4(r4) |
| 294 |
|
|
stw r20,12*4(r4) |
| 295 |
|
|
stw r21,13*4(r4) |
| 296 |
|
|
stw r22,14*4(r4) |
| 297 |
|
|
|
| 298 |
|
|
// Restore PowerPC registers |
| 299 |
|
|
lmw r13,56(r1) |
| 300 |
|
|
#if SAVE_FP_EXEC_68K |
| 301 |
|
|
lfd f14,56+19*4+0*8(r1) |
| 302 |
|
|
lfd f15,56+19*4+1*8(r1) |
| 303 |
|
|
lfd f16,56+19*4+2*8(r1) |
| 304 |
|
|
lfd f17,56+19*4+3*8(r1) |
| 305 |
|
|
lfd f18,56+19*4+4*8(r1) |
| 306 |
|
|
lfd f19,56+19*4+5*8(r1) |
| 307 |
|
|
lfd f20,56+19*4+6*8(r1) |
| 308 |
|
|
lfd f21,56+19*4+7*8(r1) |
| 309 |
|
|
lfd f22,56+19*4+8*8(r1) |
| 310 |
|
|
lfd f23,56+19*4+9*8(r1) |
| 311 |
|
|
lfd f24,56+19*4+10*8(r1) |
| 312 |
|
|
lfd f25,56+19*4+11*8(r1) |
| 313 |
|
|
lfd f26,56+19*4+12*8(r1) |
| 314 |
|
|
lfd f27,56+19*4+13*8(r1) |
| 315 |
|
|
lfd f28,56+19*4+14*8(r1) |
| 316 |
|
|
lfd f29,56+19*4+15*8(r1) |
| 317 |
|
|
lfd f30,56+19*4+16*8(r1) |
| 318 |
|
|
lfd f31,56+19*4+17*8(r1) |
| 319 |
|
|
#endif |
| 320 |
|
|
|
| 321 |
|
|
// Return to caller |
| 322 |
|
|
lwz r0,52(r1) |
| 323 |
|
|
mtcrf 0xff,r0 |
| 324 |
|
|
lwz r0,56+19*4+18*8+4(r1) |
| 325 |
|
|
mtlr r0 |
| 326 |
|
|
addi r1,r1,56+19*4+18*8 |
| 327 |
|
|
blr |
| 328 |
|
|
|
| 329 |
|
|
|
| 330 |
|
|
// Save address of EXEC_RETURN routine for 68k emulator patch |
| 331 |
|
|
2: mflr r0 |
| 332 |
|
|
stw r0,XLM_EXEC_RETURN_PROC(r0) |
| 333 |
|
|
|
| 334 |
|
|
// Skip over EMUL_BREAK/EMUL_OP routine and get its address |
| 335 |
|
|
bl 3f |
| 336 |
|
|
|
| 337 |
|
|
|
| 338 |
|
|
/* |
| 339 |
|
|
* EMUL_BREAK/EMUL_OP: Execute native routine, selector in r5 (my own private mode switch) |
| 340 |
|
|
* |
| 341 |
|
|
* 68k registers are stored in a M68kRegisters struct on the stack |
| 342 |
|
|
* which the native routine may read and modify |
| 343 |
|
|
*/ |
| 344 |
|
|
|
| 345 |
|
|
// Save r25 (contains current 68k interrupt level) |
| 346 |
|
|
stw r25,XLM_68K_R25(r0) |
| 347 |
|
|
|
| 348 |
|
|
// Entering EMUL_OP mode within 68k emulator |
| 349 |
|
|
li r0,MODE_EMUL_OP |
| 350 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 351 |
|
|
|
| 352 |
|
|
// Create PowerPC stack frame, reserve space for M68kRegisters |
| 353 |
|
|
mr r3,r1 |
| 354 |
|
|
subi r1,r1,64 // Fake "caller" frame |
| 355 |
|
|
rlwinm r1,r1,0,0,27 // Align stack |
| 356 |
|
|
|
| 357 |
|
|
mfcr r0 |
| 358 |
|
|
rlwinm r0,r0,0,11,8 |
| 359 |
|
|
stw r0,4(r1) |
| 360 |
|
|
mfxer r0 |
| 361 |
|
|
stw r0,16(r1) |
| 362 |
|
|
stw r2,12(r1) |
| 363 |
|
|
stwu r1,-(8+16*4+15*8)(r1) |
| 364 |
|
|
|
| 365 |
|
|
// Save 68k registers (M68kRegisters) |
| 366 |
|
|
stw r8,8+0*4(r1) // d[0]..d[7] |
| 367 |
|
|
stw r9,8+1*4(r1) |
| 368 |
|
|
stw r10,8+2*4(r1) |
| 369 |
|
|
stw r11,8+3*4(r1) |
| 370 |
|
|
stw r12,8+4*4(r1) |
| 371 |
|
|
stw r13,8+5*4(r1) |
| 372 |
|
|
stw r14,8+6*4(r1) |
| 373 |
|
|
stw r15,8+7*4(r1) |
| 374 |
|
|
stw r16,8+8*4(r1) // a[0]..a[7] |
| 375 |
|
|
stw r17,8+9*4(r1) |
| 376 |
|
|
stw r18,8+10*4(r1) |
| 377 |
|
|
stw r19,8+11*4(r1) |
| 378 |
|
|
stw r20,8+12*4(r1) |
| 379 |
|
|
stw r21,8+13*4(r1) |
| 380 |
|
|
stw r22,8+14*4(r1) |
| 381 |
|
|
stw r3,8+15*4(r1) |
| 382 |
|
|
stfd f0,8+16*4+0*8(r1) |
| 383 |
|
|
stfd f1,8+16*4+1*8(r1) |
| 384 |
|
|
stfd f2,8+16*4+2*8(r1) |
| 385 |
|
|
stfd f3,8+16*4+3*8(r1) |
| 386 |
|
|
stfd f4,8+16*4+4*8(r1) |
| 387 |
|
|
stfd f5,8+16*4+5*8(r1) |
| 388 |
|
|
stfd f6,8+16*4+6*8(r1) |
| 389 |
|
|
stfd f7,8+16*4+7*8(r1) |
| 390 |
|
|
mffs f0 |
| 391 |
|
|
stfd f8,8+16*4+8*8(r1) |
| 392 |
|
|
stfd f9,8+16*4+9*8(r1) |
| 393 |
|
|
stfd f10,8+16*4+10*8(r1) |
| 394 |
|
|
stfd f11,8+16*4+11*8(r1) |
| 395 |
|
|
stfd f12,8+16*4+12*8(r1) |
| 396 |
|
|
stfd f13,8+16*4+13*8(r1) |
| 397 |
|
|
stfd f0,8+16*4+14*8(r1) |
| 398 |
|
|
|
| 399 |
|
|
// Execute native routine |
| 400 |
|
|
lwz r13,XLM_TOC(r0) |
| 401 |
|
|
addi r3,r1,8 |
| 402 |
|
|
mr r4,r24 |
| 403 |
|
|
bl EmulOp__FP13M68kRegistersUii |
| 404 |
|
|
|
| 405 |
|
|
// Restore 68k registers (M68kRegisters) |
| 406 |
|
|
lwz r8,8+0*4(r1) // d[0]..d[7] |
| 407 |
|
|
lwz r9,8+1*4(r1) |
| 408 |
|
|
lwz r10,8+2*4(r1) |
| 409 |
|
|
lwz r11,8+3*4(r1) |
| 410 |
|
|
lwz r12,8+4*4(r1) |
| 411 |
|
|
lwz r13,8+5*4(r1) |
| 412 |
|
|
lwz r14,8+6*4(r1) |
| 413 |
|
|
lwz r15,8+7*4(r1) |
| 414 |
|
|
lwz r16,8+8*4(r1) // a[0]..a[7] |
| 415 |
|
|
lwz r17,8+9*4(r1) |
| 416 |
|
|
lwz r18,8+10*4(r1) |
| 417 |
|
|
lwz r19,8+11*4(r1) |
| 418 |
|
|
lwz r20,8+12*4(r1) |
| 419 |
|
|
lwz r21,8+13*4(r1) |
| 420 |
|
|
lwz r22,8+14*4(r1) |
| 421 |
|
|
lwz r3,8+15*4(r1) |
| 422 |
|
|
lfd f13,8+16*4+14*8(r1) |
| 423 |
|
|
lfd f0,8+16*4+0*8(r1) |
| 424 |
|
|
lfd f1,8+16*4+1*8(r1) |
| 425 |
|
|
lfd f2,8+16*4+2*8(r1) |
| 426 |
|
|
lfd f3,8+16*4+3*8(r1) |
| 427 |
|
|
lfd f4,8+16*4+4*8(r1) |
| 428 |
|
|
lfd f5,8+16*4+5*8(r1) |
| 429 |
|
|
lfd f6,8+16*4+6*8(r1) |
| 430 |
|
|
lfd f7,8+16*4+7*8(r1) |
| 431 |
|
|
mtfsf 0xff,f13 |
| 432 |
|
|
lfd f8,8+16*4+8*8(r1) |
| 433 |
|
|
lfd f9,8+16*4+9*8(r1) |
| 434 |
|
|
lfd f10,8+16*4+10*8(r1) |
| 435 |
|
|
lfd f11,8+16*4+11*8(r1) |
| 436 |
|
|
lfd f12,8+16*4+12*8(r1) |
| 437 |
|
|
lfd f13,8+16*4+13*8(r1) |
| 438 |
|
|
|
| 439 |
|
|
// Delete PowerPC stack frame |
| 440 |
|
|
lwz r2,8+16*4+15*8+12(r1) |
| 441 |
|
|
lwz r0,8+16*4+15*8+16(r1) |
| 442 |
|
|
mtxer r0 |
| 443 |
|
|
lwz r0,8+16*4+15*8+4(r1) |
| 444 |
|
|
mtcrf 0xff,r0 |
| 445 |
|
|
mr r1,r3 |
| 446 |
|
|
|
| 447 |
|
|
// Reentering 68k emulator |
| 448 |
|
|
li r0,MODE_68K |
| 449 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 450 |
|
|
|
| 451 |
|
|
// Set r0 to 0 for 68k emulator |
| 452 |
|
|
li r0,0 |
| 453 |
|
|
|
| 454 |
|
|
// Execute next 68k opcode |
| 455 |
|
|
rlwimi r29,r27,3,13,28 |
| 456 |
|
|
lhau r27,2(r24) |
| 457 |
|
|
mtlr r29 |
| 458 |
|
|
blr |
| 459 |
|
|
|
| 460 |
|
|
|
| 461 |
|
|
// Save address of EMUL_BREAK/EMUL_OP routine for 68k emulator patch |
| 462 |
|
|
3: mflr r0 |
| 463 |
|
|
stw r0,XLM_EMUL_OP_PROC(r0) |
| 464 |
|
|
|
| 465 |
|
|
// Save stack pointer for EMUL_RETURN |
| 466 |
|
|
stw r1,XLM_EMUL_RETURN_STACK(r0) |
| 467 |
|
|
|
| 468 |
|
|
// Preset registers for ROM boot routine |
| 469 |
|
|
lis r3,0x40b0 // Pointer to ROM boot structure |
| 470 |
|
|
ori r3,r3,0xd000 |
| 471 |
|
|
|
| 472 |
|
|
// 68k emulator is now active |
| 473 |
|
|
li r0,MODE_68K |
| 474 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 475 |
|
|
|
| 476 |
|
|
// Jump to ROM |
| 477 |
|
|
bctr |
| 478 |
|
|
|
| 479 |
|
|
|
| 480 |
|
|
/* |
| 481 |
|
|
* void execute_68k(uint32 pc {r3}, M68kRegisters *r {r4}) - Execute 68k routine |
| 482 |
|
|
*/ |
| 483 |
|
|
|
| 484 |
|
|
.globl execute_68k |
| 485 |
|
|
execute_68k: |
| 486 |
|
|
// Create MacOS stack frame |
| 487 |
|
|
mflr r0 |
| 488 |
|
|
stw r0,4(r1) |
| 489 |
|
|
stwu r1,-(56+19*4+18*8)(r1) |
| 490 |
|
|
mfcr r0 |
| 491 |
|
|
stw r4,48(r1) // save pointer to M68kRegisters for EXEC_RETURN |
| 492 |
|
|
stw r0,52(r1) // save CR |
| 493 |
|
|
|
| 494 |
|
|
// Save PowerPC registers |
| 495 |
|
|
stmw r13,56(r1) |
| 496 |
|
|
#if SAVE_FP_EXEC_68K |
| 497 |
|
|
stfd f14,56+19*4+0*8(r1) |
| 498 |
|
|
stfd f15,56+19*4+1*8(r1) |
| 499 |
|
|
stfd f16,56+19*4+2*8(r1) |
| 500 |
|
|
stfd f17,56+19*4+3*8(r1) |
| 501 |
|
|
stfd f18,56+19*4+4*8(r1) |
| 502 |
|
|
stfd f19,56+19*4+5*8(r1) |
| 503 |
|
|
stfd f20,56+19*4+6*8(r1) |
| 504 |
|
|
stfd f21,56+19*4+7*8(r1) |
| 505 |
|
|
stfd f22,56+19*4+8*8(r1) |
| 506 |
|
|
stfd f23,56+19*4+9*8(r1) |
| 507 |
|
|
stfd f24,56+19*4+10*8(r1) |
| 508 |
|
|
stfd f25,56+19*4+11*8(r1) |
| 509 |
|
|
stfd f26,56+19*4+12*8(r1) |
| 510 |
|
|
stfd f27,56+19*4+13*8(r1) |
| 511 |
|
|
stfd f28,56+19*4+14*8(r1) |
| 512 |
|
|
stfd f29,56+19*4+15*8(r1) |
| 513 |
|
|
stfd f30,56+19*4+16*8(r1) |
| 514 |
|
|
stfd f31,56+19*4+17*8(r1) |
| 515 |
|
|
#endif |
| 516 |
|
|
|
| 517 |
|
|
// Set up registers for 68k emulator |
| 518 |
|
|
lwz r31,XLM_KERNEL_DATA(r0) // Pointer to Kernel Data |
| 519 |
|
|
addi r31,r31,0x1000 |
| 520 |
|
|
li r0,0 |
| 521 |
|
|
mtcrf 0xff,r0 |
| 522 |
|
|
creqv 11,11,11 // Supervisor mode |
| 523 |
|
|
lwz r8,0*4(r4) // d[0]..d[7] |
| 524 |
|
|
lwz r9,1*4(r4) |
| 525 |
|
|
lwz r10,2*4(r4) |
| 526 |
|
|
lwz r11,3*4(r4) |
| 527 |
|
|
lwz r12,4*4(r4) |
| 528 |
|
|
lwz r13,5*4(r4) |
| 529 |
|
|
lwz r14,6*4(r4) |
| 530 |
|
|
lwz r15,7*4(r4) |
| 531 |
|
|
lwz r16,8*4(r4) // a[0]..a[6] |
| 532 |
|
|
lwz r17,9*4(r4) |
| 533 |
|
|
lwz r18,10*4(r4) |
| 534 |
|
|
lwz r19,11*4(r4) |
| 535 |
|
|
lwz r20,12*4(r4) |
| 536 |
|
|
lwz r21,13*4(r4) |
| 537 |
|
|
lwz r22,14*4(r4) |
| 538 |
|
|
li r23,0 |
| 539 |
|
|
mr r24,r3 |
| 540 |
|
|
lwz r25,XLM_68K_R25(r0) // MSB of SR |
| 541 |
|
|
li r26,0 |
| 542 |
|
|
li r28,0 // VBR |
| 543 |
|
|
lwz r29,0x74(r31) // Pointer to opcode table |
| 544 |
|
|
lwz r30,0x78(r31) // Address of emulator |
| 545 |
|
|
|
| 546 |
|
|
// Push return address (points to EXEC_RETURN opcode) on stack |
| 547 |
|
|
li r0,XLM_EXEC_RETURN_OPCODE |
| 548 |
|
|
stwu r0,-4(r1) |
| 549 |
|
|
|
| 550 |
|
|
// Reentering 68k emulator |
| 551 |
|
|
li r0,MODE_68K |
| 552 |
|
|
stw r0,XLM_RUN_MODE(r0) |
| 553 |
|
|
|
| 554 |
|
|
// Set r0 to 0 for 68k emulator |
| 555 |
|
|
li r0,0 |
| 556 |
|
|
|
| 557 |
|
|
// Execute 68k opcode |
| 558 |
|
|
lha r27,0(r24) |
| 559 |
|
|
rlwimi r29,r27,3,13,28 |
| 560 |
|
|
lhau r27,2(r24) |
| 561 |
|
|
mtlr r29 |
| 562 |
|
|
blr |
| 563 |
|
|
|
| 564 |
|
|
|
| 565 |
|
|
/* |
| 566 |
|
|
* uint32 call_macos1(uint32 tvect{r3}, uint32 arg1{r4}) ... - Call MacOS routines |
| 567 |
|
|
*/ |
| 568 |
|
|
|
| 569 |
|
|
#define prolog \ |
| 570 |
|
|
mflr r0; \ |
| 571 |
|
|
stw r0,4(r1); \ |
| 572 |
|
|
stwu r1,-64(r1) |
| 573 |
|
|
|
| 574 |
|
|
#define epilog \ |
| 575 |
|
|
lwz r13,XLM_TOC(r0);\ |
| 576 |
|
|
lwz r0,64+4(r1); \ |
| 577 |
|
|
mtlr r0; \ |
| 578 |
|
|
addi r1,r1,64; \ |
| 579 |
|
|
blr |
| 580 |
|
|
|
| 581 |
|
|
.globl call_macos |
| 582 |
|
|
call_macos: |
| 583 |
|
|
prolog |
| 584 |
|
|
lwz r0,0(r3) // Get routine address |
| 585 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 586 |
|
|
mtctr r0 |
| 587 |
|
|
bctrl |
| 588 |
|
|
epilog |
| 589 |
|
|
|
| 590 |
|
|
.globl call_macos1 |
| 591 |
|
|
call_macos1: |
| 592 |
|
|
prolog |
| 593 |
|
|
lwz r0,0(r3) // Get routine address |
| 594 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 595 |
|
|
mtctr r0 |
| 596 |
|
|
mr r3,r4 |
| 597 |
|
|
bctrl |
| 598 |
|
|
epilog |
| 599 |
|
|
|
| 600 |
|
|
.globl call_macos2 |
| 601 |
|
|
call_macos2: |
| 602 |
|
|
prolog |
| 603 |
|
|
lwz r0,0(r3) // Get routine address |
| 604 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 605 |
|
|
mtctr r0 |
| 606 |
|
|
mr r3,r4 |
| 607 |
|
|
mr r4,r5 |
| 608 |
|
|
bctrl |
| 609 |
|
|
epilog |
| 610 |
|
|
|
| 611 |
|
|
.globl call_macos3 |
| 612 |
|
|
call_macos3: |
| 613 |
|
|
prolog |
| 614 |
|
|
lwz r0,0(r3) // Get routine address |
| 615 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 616 |
|
|
mtctr r0 |
| 617 |
|
|
mr r3,r4 |
| 618 |
|
|
mr r4,r5 |
| 619 |
|
|
mr r5,r6 |
| 620 |
|
|
bctrl |
| 621 |
|
|
epilog |
| 622 |
|
|
|
| 623 |
|
|
.globl call_macos4 |
| 624 |
|
|
call_macos4: |
| 625 |
|
|
prolog |
| 626 |
|
|
lwz r0,0(r3) // Get routine address |
| 627 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 628 |
|
|
mtctr r0 |
| 629 |
|
|
mr r3,r4 |
| 630 |
|
|
mr r4,r5 |
| 631 |
|
|
mr r5,r6 |
| 632 |
|
|
mr r6,r7 |
| 633 |
|
|
bctrl |
| 634 |
|
|
epilog |
| 635 |
|
|
|
| 636 |
|
|
.globl call_macos5 |
| 637 |
|
|
call_macos5: |
| 638 |
|
|
prolog |
| 639 |
|
|
lwz r0,0(r3) // Get routine address |
| 640 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 641 |
|
|
mtctr r0 |
| 642 |
|
|
mr r3,r4 |
| 643 |
|
|
mr r4,r5 |
| 644 |
|
|
mr r5,r6 |
| 645 |
|
|
mr r6,r7 |
| 646 |
|
|
mr r7,r8 |
| 647 |
|
|
bctrl |
| 648 |
|
|
epilog |
| 649 |
|
|
|
| 650 |
|
|
.globl call_macos6 |
| 651 |
|
|
call_macos6: |
| 652 |
|
|
prolog |
| 653 |
|
|
lwz r0,0(r3) // Get routine address |
| 654 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 655 |
|
|
mtctr r0 |
| 656 |
|
|
mr r3,r4 |
| 657 |
|
|
mr r4,r5 |
| 658 |
|
|
mr r5,r6 |
| 659 |
|
|
mr r6,r7 |
| 660 |
|
|
mr r7,r8 |
| 661 |
|
|
mr r8,r9 |
| 662 |
|
|
bctrl |
| 663 |
|
|
epilog |
| 664 |
|
|
|
| 665 |
|
|
.globl call_macos7 |
| 666 |
|
|
call_macos7: |
| 667 |
|
|
prolog |
| 668 |
|
|
lwz r0,0(r3) // Get routine address |
| 669 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 670 |
|
|
mtctr r0 |
| 671 |
|
|
mr r3,r4 |
| 672 |
|
|
mr r4,r5 |
| 673 |
|
|
mr r5,r6 |
| 674 |
|
|
mr r6,r7 |
| 675 |
|
|
mr r7,r8 |
| 676 |
|
|
mr r8,r9 |
| 677 |
|
|
mr r9,r10 |
| 678 |
|
|
bctrl |
| 679 |
|
|
epilog |
| 680 |
|
|
|
| 681 |
|
|
|
| 682 |
|
|
/* |
| 683 |
|
|
* Native resource manager patches |
| 684 |
|
|
*/ |
| 685 |
|
|
|
| 686 |
|
|
.globl get_resource |
| 687 |
|
|
get_resource: |
| 688 |
|
|
// Create stack frame |
| 689 |
|
|
mflr r0 |
| 690 |
|
|
stw r0,8(r1) |
| 691 |
|
|
stwu r1,-(56+12)(r1) |
| 692 |
|
|
|
| 693 |
|
|
// Save type/ID |
| 694 |
|
|
stw r3,56(r1) |
| 695 |
|
|
stw r4,56+4(r1) |
| 696 |
|
|
|
| 697 |
|
|
// Call old routine |
| 698 |
|
|
lwz r0,XLM_GET_RESOURCE(r0) |
| 699 |
|
|
lwz r2,XLM_RES_LIB_TOC(r0) |
| 700 |
|
|
mtctr r0 |
| 701 |
|
|
bctrl |
| 702 |
|
|
stw r3,56+8(r1) // Save handle |
| 703 |
|
|
|
| 704 |
|
|
// Call CheckLoad |
| 705 |
|
|
lwz r3,56(r1) |
| 706 |
|
|
lwz r4,56+4(r1) |
| 707 |
|
|
lwz r5,56+8(r1) |
| 708 |
|
|
bl check_load_invoc__FUisPPUs |
| 709 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 710 |
|
|
|
| 711 |
|
|
// Return to caller |
| 712 |
|
|
lwz r0,56+12+8(r1) |
| 713 |
|
|
mtlr r0 |
| 714 |
|
|
addi r1,r1,56+12 |
| 715 |
|
|
blr |
| 716 |
|
|
|
| 717 |
|
|
.globl get_1_resource |
| 718 |
|
|
get_1_resource: |
| 719 |
|
|
// Create stack frame |
| 720 |
|
|
mflr r0 |
| 721 |
|
|
stw r0,8(r1) |
| 722 |
|
|
stwu r1,-(56+12)(r1) |
| 723 |
|
|
|
| 724 |
|
|
// Save type/ID |
| 725 |
|
|
stw r3,56(r1) |
| 726 |
|
|
stw r4,56+4(r1) |
| 727 |
|
|
|
| 728 |
|
|
// Call old routine |
| 729 |
|
|
lwz r0,XLM_GET_1_RESOURCE(r0) |
| 730 |
|
|
lwz r2,XLM_RES_LIB_TOC(r0) |
| 731 |
|
|
mtctr r0 |
| 732 |
|
|
bctrl |
| 733 |
|
|
stw r3,56+8(r1) // Save handle |
| 734 |
|
|
|
| 735 |
|
|
// Call CheckLoad |
| 736 |
|
|
lwz r3,56(r1) |
| 737 |
|
|
lwz r4,56+4(r1) |
| 738 |
|
|
lwz r5,56+8(r1) |
| 739 |
|
|
bl check_load_invoc__FUisPPUs |
| 740 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 741 |
|
|
|
| 742 |
|
|
// Return to caller |
| 743 |
|
|
lwz r0,56+12+8(r1) |
| 744 |
|
|
mtlr r0 |
| 745 |
|
|
addi r1,r1,56+12 |
| 746 |
|
|
blr |
| 747 |
|
|
|
| 748 |
|
|
.globl get_ind_resource |
| 749 |
|
|
get_ind_resource: |
| 750 |
|
|
// Create stack frame |
| 751 |
|
|
mflr r0 |
| 752 |
|
|
stw r0,8(r1) |
| 753 |
|
|
stwu r1,-(56+12)(r1) |
| 754 |
|
|
|
| 755 |
|
|
// Save type/index |
| 756 |
|
|
stw r3,56(r1) |
| 757 |
|
|
stw r4,56+4(r1) |
| 758 |
|
|
|
| 759 |
|
|
// Call old routine |
| 760 |
|
|
lwz r0,XLM_GET_IND_RESOURCE(r0) |
| 761 |
|
|
lwz r2,XLM_RES_LIB_TOC(r0) |
| 762 |
|
|
mtctr r0 |
| 763 |
|
|
bctrl |
| 764 |
|
|
stw r3,56+8(r1) // Save handle |
| 765 |
|
|
|
| 766 |
|
|
// Call CheckLoad |
| 767 |
|
|
lwz r3,56(r1) |
| 768 |
|
|
lwz r4,56+4(r1) |
| 769 |
|
|
lwz r5,56+8(r1) |
| 770 |
|
|
bl check_load_invoc__FUisPPUs |
| 771 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 772 |
|
|
|
| 773 |
|
|
// Return to caller |
| 774 |
|
|
lwz r0,56+12+8(r1) |
| 775 |
|
|
mtlr r0 |
| 776 |
|
|
addi r1,r1,56+12 |
| 777 |
|
|
blr |
| 778 |
|
|
|
| 779 |
|
|
.globl get_1_ind_resource |
| 780 |
|
|
get_1_ind_resource: |
| 781 |
|
|
// Create stack frame |
| 782 |
|
|
mflr r0 |
| 783 |
|
|
stw r0,8(r1) |
| 784 |
|
|
stwu r1,-(56+12)(r1) |
| 785 |
|
|
|
| 786 |
|
|
// Save type/index |
| 787 |
|
|
stw r3,56(r1) |
| 788 |
|
|
stw r4,56+4(r1) |
| 789 |
|
|
|
| 790 |
|
|
// Call old routine |
| 791 |
|
|
lwz r0,XLM_GET_1_IND_RESOURCE(r0) |
| 792 |
|
|
lwz r2,XLM_RES_LIB_TOC(r0) |
| 793 |
|
|
mtctr r0 |
| 794 |
|
|
bctrl |
| 795 |
|
|
stw r3,56+8(r1) // Save handle |
| 796 |
|
|
|
| 797 |
|
|
// Call CheckLoad |
| 798 |
|
|
lwz r3,56(r1) |
| 799 |
|
|
lwz r4,56+4(r1) |
| 800 |
|
|
lwz r5,56+8(r1) |
| 801 |
|
|
bl check_load_invoc__FUisPPUs |
| 802 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 803 |
|
|
|
| 804 |
|
|
// Return to caller |
| 805 |
|
|
lwz r0,56+12+8(r1) |
| 806 |
|
|
mtlr r0 |
| 807 |
|
|
addi r1,r1,56+12 |
| 808 |
|
|
blr |
| 809 |
|
|
|
| 810 |
|
|
.globl r_get_resource |
| 811 |
|
|
r_get_resource: |
| 812 |
|
|
// Create stack frame |
| 813 |
|
|
mflr r0 |
| 814 |
|
|
stw r0,8(r1) |
| 815 |
|
|
stwu r1,-(56+12)(r1) |
| 816 |
|
|
|
| 817 |
|
|
// Save type/ID |
| 818 |
|
|
stw r3,56(r1) |
| 819 |
|
|
stw r4,56+4(r1) |
| 820 |
|
|
|
| 821 |
|
|
// Call old routine |
| 822 |
|
|
lwz r0,XLM_R_GET_RESOURCE(r0) |
| 823 |
|
|
lwz r2,XLM_RES_LIB_TOC(r0) |
| 824 |
|
|
mtctr r0 |
| 825 |
|
|
bctrl |
| 826 |
|
|
stw r3,56+8(r1) // Save handle |
| 827 |
|
|
|
| 828 |
|
|
// Call CheckLoad |
| 829 |
|
|
lwz r3,56(r1) |
| 830 |
|
|
lwz r4,56+4(r1) |
| 831 |
|
|
lwz r5,56+8(r1) |
| 832 |
|
|
bl check_load_invoc__FUisPPUs |
| 833 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 834 |
|
|
|
| 835 |
|
|
// Return to caller |
| 836 |
|
|
lwz r0,56+12+8(r1) |
| 837 |
|
|
mtlr r0 |
| 838 |
|
|
addi r1,r1,56+12 |
| 839 |
|
|
blr |
| 840 |
|
|
|
| 841 |
|
|
|
| 842 |
|
|
/* |
| 843 |
|
|
* void ppc_interrupt(uint32 entry{r3}, uint32 kernel_data{r4}) - Execute PPC interrupt |
| 844 |
|
|
*/ |
| 845 |
|
|
|
| 846 |
|
|
.globl ppc_interrupt |
| 847 |
|
|
ppc_interrupt: |
| 848 |
|
|
mflr r0 |
| 849 |
|
|
stw r0,4(r1) |
| 850 |
|
|
stwu r1,-64(r1) |
| 851 |
|
|
|
| 852 |
|
|
// Get address of return routine |
| 853 |
|
|
bl 1f |
| 854 |
|
|
|
| 855 |
|
|
// Return routine |
| 856 |
|
|
lwz r0,64+4(r1) |
| 857 |
|
|
mtlr r0 |
| 858 |
|
|
addi r1,r1,64 |
| 859 |
|
|
blr |
| 860 |
|
|
|
| 861 |
|
|
// Prepare registers for nanokernel interrupt routine |
| 862 |
|
|
1: mtctr r1 |
| 863 |
|
|
mr r1,r4 |
| 864 |
|
|
stw r6,0x018(r1) |
| 865 |
|
|
mfctr r6 |
| 866 |
|
|
stw r6,0x004(r1) |
| 867 |
|
|
lwz r6,0x65c(r1) |
| 868 |
|
|
stw r7,0x13c(r6) |
| 869 |
|
|
stw r8,0x144(r6) |
| 870 |
|
|
stw r9,0x14c(r6) |
| 871 |
|
|
stw r10,0x154(r6) |
| 872 |
|
|
stw r11,0x15c(r6) |
| 873 |
|
|
stw r12,0x164(r6) |
| 874 |
|
|
stw r13,0x16c(r6) |
| 875 |
|
|
|
| 876 |
|
|
mflr r10 |
| 877 |
|
|
mfcr r13 |
| 878 |
|
|
lwz r7,0x660(r1) |
| 879 |
|
|
mflr r12 |
| 880 |
|
|
rlwimi. r7,r7,8,0,0 |
| 881 |
|
|
li r11,0 |
| 882 |
|
|
ori r11,r11,0xf072 // MSR (SRR1) |
| 883 |
|
|
mtcrf 0x70,r11 |
| 884 |
|
|
li r8,0 |
| 885 |
|
|
|
| 886 |
|
|
// Enter nanokernel |
| 887 |
|
|
mtlr r3 |
| 888 |
|
|
blr |
