projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 42d1f039 | 1 | /* |
| 69bcf5bc | 2 | * Copyright 2004, 2007-2010 Freescale Semiconductor, Inc. |
| 42d1f039 | 3 | * Copyright (C) 2003 Motorola,Inc. |
| 42d1f039 WD |
4 | * |
| 5 | * See file CREDITS for list of people who contributed to this | |
| 6 | * project. | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU General Public License as | |
| 10 | * published by the Free Software Foundation; either version 2 of | |
| 11 | * the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | * This program is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | * GNU General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU General Public License | |
| 19 | * along with this program; if not, write to the Free Software | |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 21 | * MA 02111-1307 USA | |
| 22 | */ | |
| 23 | ||
| 24 | /* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards | |
| 25 | * | |
| 26 | * The processor starts at 0xfffffffc and the code is first executed in the | |
| 27 | * last 4K page(0xfffff000-0xffffffff) in flash/rom. | |
| 28 | * | |
| 29 | */ | |
| 30 | ||
| 31 | #include <config.h> | |
| 32 | #include <mpc85xx.h> | |
| 561858ee | 33 | #include <timestamp.h> |
| 42d1f039 WD |
34 | #include <version.h> |
| 35 | ||
| 36 | #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ | |
| 37 | ||
| 38 | #include <ppc_asm.tmpl> | |
| 39 | #include <ppc_defs.h> | |
| 40 | ||
| 41 | #include <asm/cache.h> | |
| 42 | #include <asm/mmu.h> | |
| 43 | ||
| 44 | #ifndef CONFIG_IDENT_STRING | |
| 45 | #define CONFIG_IDENT_STRING "" | |
| 46 | #endif | |
| 47 | ||
| 48 | #undef MSR_KERNEL | |
| 61a21e98 | 49 | #define MSR_KERNEL ( MSR_ME ) /* Machine Check */ |
| 42d1f039 WD |
50 | |
| 51 | /* | |
| 52 | * Set up GOT: Global Offset Table | |
| 53 | * | |
| 0f8aa159 | 54 | * Use r12 to access the GOT |
| 42d1f039 WD |
55 | */ |
| 56 | START_GOT | |
| 57 | GOT_ENTRY(_GOT2_TABLE_) | |
| 58 | GOT_ENTRY(_FIXUP_TABLE_) | |
| 59 | ||
| 7da53351 | 60 | #ifndef CONFIG_NAND_SPL |
| 42d1f039 WD |
61 | GOT_ENTRY(_start) |
| 62 | GOT_ENTRY(_start_of_vectors) | |
| 63 | GOT_ENTRY(_end_of_vectors) | |
| 64 | GOT_ENTRY(transfer_to_handler) | |
| 7da53351 | 65 | #endif |
| 42d1f039 WD |
66 | |
| 67 | GOT_ENTRY(__init_end) | |
| 68 | GOT_ENTRY(_end) | |
| 69 | GOT_ENTRY(__bss_start) | |
| 70 | END_GOT | |
| 71 | ||
| 72 | /* | |
| 73 | * e500 Startup -- after reset only the last 4KB of the effective | |
| 74 | * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg | |
| 75 | * section is located at THIS LAST page and basically does three | |
| 76 | * things: clear some registers, set up exception tables and | |
| 77 | * add more TLB entries for 'larger spaces'(e.g. the boot rom) to | |
| 78 | * continue the boot procedure. | |
| 79 | ||
| 80 | * Once the boot rom is mapped by TLB entries we can proceed | |
| 81 | * with normal startup. | |
| 82 | * | |
| 83 | */ | |
| 84 | ||
| 61a21e98 AF |
85 | .section .bootpg,"ax" |
| 86 | .globl _start_e500 | |
| 42d1f039 WD |
87 | |
| 88 | _start_e500: | |
| 97d80fc3 | 89 | |
| 61a21e98 | 90 | /* clear registers/arrays not reset by hardware */ |
| 42d1f039 | 91 | |
| 61a21e98 AF |
92 | /* L1 */ |
| 93 | li r0,2 | |
| 94 | mtspr L1CSR0,r0 /* invalidate d-cache */ | |
| 53677ef1 | 95 | mtspr L1CSR1,r0 /* invalidate i-cache */ |
| 42d1f039 WD |
96 | |
| 97 | mfspr r1,DBSR | |
| 98 | mtspr DBSR,r1 /* Clear all valid bits */ | |
| 99 | ||
| 61a21e98 AF |
100 | /* |
| 101 | * Enable L1 Caches early | |
| 102 | * | |
| 103 | */ | |
| 42d1f039 | 104 | |
| 82fd1f8d KG |
105 | #if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING) |
| 106 | /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */ | |
| 107 | li r2,(32 + 0) | |
| 108 | mtspr L1CSR2,r2 | |
| 109 | #endif | |
| 110 | ||
| 33f57bd5 KG |
111 | /* Enable/invalidate the I-Cache */ |
| 112 | lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h | |
| 113 | ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l | |
| 114 | mtspr SPRN_L1CSR1,r2 | |
| 115 | 1: | |
| 116 | mfspr r3,SPRN_L1CSR1 | |
| 117 | and. r1,r3,r2 | |
| 118 | bne 1b | |
| 119 | ||
| 120 | lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h | |
| 121 | ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l | |
| 122 | mtspr SPRN_L1CSR1,r3 | |
| 61a21e98 | 123 | isync |
| 33f57bd5 KG |
124 | 2: |
| 125 | mfspr r3,SPRN_L1CSR1 | |
| 126 | andi. r1,r3,L1CSR1_ICE@l | |
| 127 | beq 2b | |
| 128 | ||
| 129 | /* Enable/invalidate the D-Cache */ | |
| 130 | lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h | |
| 131 | ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l | |
| 132 | mtspr SPRN_L1CSR0,r2 | |
| 133 | 1: | |
| 134 | mfspr r3,SPRN_L1CSR0 | |
| 135 | and. r1,r3,r2 | |
| 136 | bne 1b | |
| 137 | ||
| 138 | lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h | |
| 139 | ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l | |
| 140 | mtspr SPRN_L1CSR0,r3 | |
| 42d1f039 | 141 | isync |
| 33f57bd5 KG |
142 | 2: |
| 143 | mfspr r3,SPRN_L1CSR0 | |
| 144 | andi. r1,r3,L1CSR0_DCE@l | |
| 145 | beq 2b | |
| 42d1f039 WD |
146 | |
| 147 | /* Setup interrupt vectors */ | |
| 343117bf | 148 | lis r1,TEXT_BASE@h |
| 61a21e98 | 149 | mtspr IVPR,r1 |
| 42d1f039 | 150 | |
| 343117bf | 151 | li r1,0x0100 |
| 42d1f039 | 152 | mtspr IVOR0,r1 /* 0: Critical input */ |
| 343117bf | 153 | li r1,0x0200 |
| 42d1f039 | 154 | mtspr IVOR1,r1 /* 1: Machine check */ |
| 343117bf | 155 | li r1,0x0300 |
| 42d1f039 | 156 | mtspr IVOR2,r1 /* 2: Data storage */ |
| 343117bf | 157 | li r1,0x0400 |
| 42d1f039 WD |
158 | mtspr IVOR3,r1 /* 3: Instruction storage */ |
| 159 | li r1,0x0500 | |
| 160 | mtspr IVOR4,r1 /* 4: External interrupt */ | |
| 161 | li r1,0x0600 | |
| 162 | mtspr IVOR5,r1 /* 5: Alignment */ | |
| 163 | li r1,0x0700 | |
| 164 | mtspr IVOR6,r1 /* 6: Program check */ | |
| 165 | li r1,0x0800 | |
| 166 | mtspr IVOR7,r1 /* 7: floating point unavailable */ | |
| 343117bf | 167 | li r1,0x0900 |
| 42d1f039 WD |
168 | mtspr IVOR8,r1 /* 8: System call */ |
| 169 | /* 9: Auxiliary processor unavailable(unsupported) */ | |
| 343117bf | 170 | li r1,0x0a00 |
| 42d1f039 | 171 | mtspr IVOR10,r1 /* 10: Decrementer */ |
| 343117bf WD |
172 | li r1,0x0b00 |
| 173 | mtspr IVOR11,r1 /* 11: Interval timer */ | |
| 174 | li r1,0x0c00 | |
| 3e0bc447 WD |
175 | mtspr IVOR12,r1 /* 12: Watchdog timer */ |
| 176 | li r1,0x0d00 | |
| 42d1f039 | 177 | mtspr IVOR13,r1 /* 13: Data TLB error */ |
| 343117bf | 178 | li r1,0x0e00 |
| 42d1f039 | 179 | mtspr IVOR14,r1 /* 14: Instruction TLB error */ |
| 343117bf | 180 | li r1,0x0f00 |
| 42d1f039 WD |
181 | mtspr IVOR15,r1 /* 15: Debug */ |
| 182 | ||
| 42d1f039 | 183 | /* Clear and set up some registers. */ |
| 87163180 | 184 | li r0,0x0000 |
| 42d1f039 WD |
185 | lis r1,0xffff |
| 186 | mtspr DEC,r0 /* prevent dec exceptions */ | |
| 187 | mttbl r0 /* prevent fit & wdt exceptions */ | |
| 188 | mttbu r0 | |
| 189 | mtspr TSR,r1 /* clear all timer exception status */ | |
| 190 | mtspr TCR,r0 /* disable all */ | |
| 191 | mtspr ESR,r0 /* clear exception syndrome register */ | |
| 192 | mtspr MCSR,r0 /* machine check syndrome register */ | |
| 193 | mtxer r0 /* clear integer exception register */ | |
| 42d1f039 | 194 | |
| dcc87dd5 SW |
195 | #ifdef CONFIG_SYS_BOOK3E_HV |
| 196 | mtspr MAS8,r0 /* make sure MAS8 is clear */ | |
| 197 | #endif | |
| 198 | ||
| 42d1f039 | 199 | /* Enable Time Base and Select Time Base Clock */ |
| 0ac6f8b7 | 200 | lis r0,HID0_EMCP@h /* Enable machine check */ |
| d9b94f28 | 201 | #if defined(CONFIG_ENABLE_36BIT_PHYS) |
| 87163180 | 202 | ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */ |
| d9b94f28 | 203 | #endif |
| 1b3e4044 | 204 | #ifndef CONFIG_E500MC |
| 87163180 | 205 | ori r0,r0,HID0_TBEN@l /* Enable Timebase */ |
| 1b3e4044 | 206 | #endif |
| 42d1f039 | 207 | mtspr HID0,r0 |
| 42d1f039 | 208 | |
| 0f060c3b | 209 | #ifndef CONFIG_E500MC |
| 61a21e98 | 210 | li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ |
| ff8473e9 SG |
211 | mfspr r3,PVR |
| 212 | andi. r3,r3, 0xff | |
| 213 | cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */ | |
| 214 | blt 1f | |
| 215 | /* Set MBDD bit also */ | |
| 216 | ori r0, r0, HID1_MBDD@l | |
| 217 | 1: | |
| 42d1f039 | 218 | mtspr HID1,r0 |
| 0f060c3b | 219 | #endif |
| 42d1f039 WD |
220 | |
| 221 | /* Enable Branch Prediction */ | |
| 222 | #if defined(CONFIG_BTB) | |
| 69bcf5bc KG |
223 | lis r0,BUCSR_ENABLE@h |
| 224 | ori r0,r0,BUCSR_ENABLE@l | |
| 225 | mtspr SPRN_BUCSR,r0 | |
| 42d1f039 WD |
226 | #endif |
| 227 | ||
| 6d0f6bcf | 228 | #if defined(CONFIG_SYS_INIT_DBCR) |
| 42d1f039 WD |
229 | lis r1,0xffff |
| 230 | ori r1,r1,0xffff | |
| 0ac6f8b7 | 231 | mtspr DBSR,r1 /* Clear all status bits */ |
| 6d0f6bcf JCPV |
232 | lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */ |
| 233 | ori r0,r0,CONFIG_SYS_INIT_DBCR@l | |
| 0ac6f8b7 | 234 | mtspr DBCR0,r0 |
| 42d1f039 WD |
235 | #endif |
| 236 | ||
| 22b6dbc1 HW |
237 | #ifdef CONFIG_MPC8569 |
| 238 | #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000) | |
| 239 | #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0) | |
| 240 | ||
| 241 | /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to | |
| 242 | * use address space which is more than 12bits, and it must be done in | |
| 243 | * the 4K boot page. So we set this bit here. | |
| 244 | */ | |
| 245 | ||
| 246 | /* create a temp mapping TLB0[0] for LBCR */ | |
| 247 | lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h | |
| 248 | ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l | |
| 249 | ||
| 250 | lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h | |
| 251 | ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l | |
| 252 | ||
| 253 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h | |
| 254 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l | |
| 255 | ||
| 256 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
| 257 | (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 258 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
| 259 | (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 260 | ||
| 261 | mtspr MAS0,r6 | |
| 262 | mtspr MAS1,r7 | |
| 263 | mtspr MAS2,r8 | |
| 264 | mtspr MAS3,r9 | |
| 265 | isync | |
| 266 | msync | |
| 267 | tlbwe | |
| 268 | ||
| 269 | /* Set LBCR register */ | |
| 270 | lis r4,CONFIG_SYS_LBCR_ADDR@h | |
| 271 | ori r4,r4,CONFIG_SYS_LBCR_ADDR@l | |
| 272 | ||
| 273 | lis r5,CONFIG_SYS_LBC_LBCR@h | |
| 274 | ori r5,r5,CONFIG_SYS_LBC_LBCR@l | |
| 275 | stw r5,0(r4) | |
| 276 | isync | |
| 277 | ||
| 278 | /* invalidate this temp TLB */ | |
| 279 | lis r4,CONFIG_SYS_LBC_ADDR@h | |
| 280 | ori r4,r4,CONFIG_SYS_LBC_ADDR@l | |
| 281 | tlbivax 0,r4 | |
| 282 | isync | |
| 283 | ||
| 284 | #endif /* CONFIG_MPC8569 */ | |
| 285 | ||
| 87163180 KG |
286 | lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h |
| 287 | ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l | |
| 288 | ||
| 7da53351 MH |
289 | #ifndef CONFIG_SYS_RAMBOOT |
| 290 | /* create a temp mapping in AS=1 to the 4M boot window */ | |
| f51f07eb DL |
291 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h |
| 292 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l | |
| 87163180 | 293 | |
| f51f07eb DL |
294 | lis r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h |
| 295 | ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l | |
| 87163180 | 296 | |
| f51f07eb DL |
297 | /* The 85xx has the default boot window 0xff800000 - 0xffffffff */ |
| 298 | lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 299 | ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 7da53351 MH |
300 | #else |
| 301 | /* | |
| 302 | * create a temp mapping in AS=1 to the 1M TEXT_BASE space, the main | |
| 303 | * image has been relocated to TEXT_BASE on the second stage. | |
| 304 | */ | |
| 305 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h | |
| 306 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l | |
| 307 | ||
| 308 | lis r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@h | |
| 309 | ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@l | |
| 310 | ||
| 311 | lis r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 312 | ori r9,r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 313 | #endif | |
| 87163180 KG |
314 | |
| 315 | mtspr MAS0,r6 | |
| 316 | mtspr MAS1,r7 | |
| 317 | mtspr MAS2,r8 | |
| 318 | mtspr MAS3,r9 | |
| 319 | isync | |
| 320 | msync | |
| 321 | tlbwe | |
| 322 | ||
| 323 | /* create a temp mapping in AS=1 to the stack */ | |
| 324 | lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h | |
| 325 | ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l | |
| 326 | ||
| 327 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h | |
| 328 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l | |
| 329 | ||
| 6d0f6bcf JCPV |
330 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h |
| 331 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l | |
| 87163180 | 332 | |
| a3f18529 YS |
333 | #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \ |
| 334 | defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH) | |
| 335 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0, | |
| 336 | (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 337 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0, | |
| 338 | (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 339 | li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH | |
| 340 | mtspr MAS7,r10 | |
| 341 | #else | |
| 6d0f6bcf JCPV |
342 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h |
| 343 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| a3f18529 | 344 | #endif |
| 87163180 KG |
345 | |
| 346 | mtspr MAS0,r6 | |
| 347 | mtspr MAS1,r7 | |
| 348 | mtspr MAS2,r8 | |
| 349 | mtspr MAS3,r9 | |
| 350 | isync | |
| 351 | msync | |
| 352 | tlbwe | |
| 353 | ||
| 1b72dbec SW |
354 | lis r6,MSR_IS|MSR_DS@h |
| 355 | ori r6,r6,MSR_IS|MSR_DS@l | |
| 87163180 KG |
356 | lis r7,switch_as@h |
| 357 | ori r7,r7,switch_as@l | |
| 358 | ||
| 359 | mtspr SPRN_SRR0,r7 | |
| 360 | mtspr SPRN_SRR1,r6 | |
| 361 | rfi | |
| 362 | ||
| 363 | switch_as: | |
| 3db0bef5 KG |
364 | /* L1 DCache is used for initial RAM */ |
| 365 | ||
| 366 | /* Allocate Initial RAM in data cache. | |
| 367 | */ | |
| 6d0f6bcf JCPV |
368 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
| 369 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
| b009f3ec KG |
370 | mfspr r2, L1CFG0 |
| 371 | andi. r2, r2, 0x1ff | |
| 372 | /* cache size * 1024 / (2 * L1 line size) */ | |
| 373 | slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT) | |
| 3db0bef5 KG |
374 | mtctr r2 |
| 375 | li r0,0 | |
| 376 | 1: | |
| 377 | dcbz r0,r3 | |
| 378 | dcbtls 0,r0,r3 | |
| 6d0f6bcf | 379 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
| 3db0bef5 KG |
380 | bdnz 1b |
| 381 | ||
| 61a21e98 | 382 | /* Jump out the last 4K page and continue to 'normal' start */ |
| 6d0f6bcf | 383 | #ifdef CONFIG_SYS_RAMBOOT |
| 61a21e98 | 384 | b _start_cont |
| 3db0bef5 KG |
385 | #else |
| 386 | /* Calculate absolute address in FLASH and jump there */ | |
| 387 | /*--------------------------------------------------------------*/ | |
| 6d0f6bcf JCPV |
388 | lis r3,CONFIG_SYS_MONITOR_BASE@h |
| 389 | ori r3,r3,CONFIG_SYS_MONITOR_BASE@l | |
| 3db0bef5 KG |
390 | addi r3,r3,_start_cont - _start + _START_OFFSET |
| 391 | mtlr r3 | |
| 1e701e70 | 392 | blr |
| 3db0bef5 | 393 | #endif |
| 61a21e98 | 394 | |
| 61a21e98 AF |
395 | .text |
| 396 | .globl _start | |
| 397 | _start: | |
| 398 | .long 0x27051956 /* U-BOOT Magic Number */ | |
| 399 | .globl version_string | |
| 400 | version_string: | |
| 401 | .ascii U_BOOT_VERSION | |
| 561858ee | 402 | .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" |
| 61a21e98 AF |
403 | .ascii CONFIG_IDENT_STRING, "\0" |
| 404 | ||
| 405 | .align 4 | |
| 406 | .globl _start_cont | |
| 407 | _start_cont: | |
| 42d1f039 | 408 | /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/ |
| 6d0f6bcf JCPV |
409 | lis r1,CONFIG_SYS_INIT_RAM_ADDR@h |
| 410 | ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l | |
| 42d1f039 WD |
411 | |
| 412 | li r0,0 | |
| 413 | stwu r0,-4(r1) | |
| 414 | stwu r0,-4(r1) /* Terminate call chain */ | |
| 415 | ||
| 416 | stwu r1,-8(r1) /* Save back chain and move SP */ | |
| 417 | lis r0,RESET_VECTOR@h /* Address of reset vector */ | |
| 61a21e98 | 418 | ori r0,r0,RESET_VECTOR@l |
| 42d1f039 WD |
419 | stwu r1,-8(r1) /* Save back chain and move SP */ |
| 420 | stw r0,+12(r1) /* Save return addr (underflow vect) */ | |
| 421 | ||
| 422 | GET_GOT | |
| 87163180 KG |
423 | bl cpu_init_early_f |
| 424 | ||
| 425 | /* switch back to AS = 0 */ | |
| 426 | lis r3,(MSR_CE|MSR_ME|MSR_DE)@h | |
| 427 | ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l | |
| 428 | mtmsr r3 | |
| 429 | isync | |
| 430 | ||
| 42d1f039 | 431 | bl cpu_init_f |
| 42d1f039 | 432 | bl board_init_f |
| 0ac6f8b7 | 433 | isync |
| 42d1f039 | 434 | |
| 7da53351 | 435 | #ifndef CONFIG_NAND_SPL |
| 61a21e98 | 436 | . = EXC_OFF_SYS_RESET |
| 42d1f039 WD |
437 | .globl _start_of_vectors |
| 438 | _start_of_vectors: | |
| 61a21e98 | 439 | |
| 42d1f039 | 440 | /* Critical input. */ |
| 61a21e98 AF |
441 | CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException) |
| 442 | ||
| 443 | /* Machine check */ | |
| 444 | MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
| 42d1f039 WD |
445 | |
| 446 | /* Data Storage exception. */ | |
| 447 | STD_EXCEPTION(0x0300, DataStorage, UnknownException) | |
| 448 | ||
| 449 | /* Instruction Storage exception. */ | |
| 450 | STD_EXCEPTION(0x0400, InstStorage, UnknownException) | |
| 451 | ||
| 452 | /* External Interrupt exception. */ | |
| 61a21e98 | 453 | STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException) |
| 42d1f039 WD |
454 | |
| 455 | /* Alignment exception. */ | |
| 456 | . = 0x0600 | |
| 457 | Alignment: | |
| 02032e8f | 458 | EXCEPTION_PROLOG(SRR0, SRR1) |
| 42d1f039 WD |
459 | mfspr r4,DAR |
| 460 | stw r4,_DAR(r21) | |
| 461 | mfspr r5,DSISR | |
| 462 | stw r5,_DSISR(r21) | |
| 463 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| fc4e1887 | 464 | EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
| 42d1f039 WD |
465 | |
| 466 | /* Program check exception */ | |
| 467 | . = 0x0700 | |
| 468 | ProgramCheck: | |
| 02032e8f | 469 | EXCEPTION_PROLOG(SRR0, SRR1) |
| 42d1f039 | 470 | addi r3,r1,STACK_FRAME_OVERHEAD |
| fc4e1887 JT |
471 | EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
| 472 | MSR_KERNEL, COPY_EE) | |
| 42d1f039 WD |
473 | |
| 474 | /* No FPU on MPC85xx. This exception is not supposed to happen. | |
| 475 | */ | |
| 476 | STD_EXCEPTION(0x0800, FPUnavailable, UnknownException) | |
| 42d1f039 | 477 | |
| 343117bf | 478 | . = 0x0900 |
| 42d1f039 WD |
479 | /* |
| 480 | * r0 - SYSCALL number | |
| 481 | * r3-... arguments | |
| 482 | */ | |
| 483 | SystemCall: | |
| 61a21e98 AF |
484 | addis r11,r0,0 /* get functions table addr */ |
| 485 | ori r11,r11,0 /* Note: this code is patched in trap_init */ | |
| 486 | addis r12,r0,0 /* get number of functions */ | |
| 343117bf WD |
487 | ori r12,r12,0 |
| 488 | ||
| 61a21e98 | 489 | cmplw 0,r0,r12 |
| 343117bf WD |
490 | bge 1f |
| 491 | ||
| 61a21e98 | 492 | rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */ |
| 343117bf WD |
493 | add r11,r11,r0 |
| 494 | lwz r11,0(r11) | |
| 495 | ||
| 61a21e98 | 496 | li r20,0xd00-4 /* Get stack pointer */ |
| 343117bf | 497 | lwz r12,0(r20) |
| 61a21e98 | 498 | subi r12,r12,12 /* Adjust stack pointer */ |
| 343117bf | 499 | li r0,0xc00+_end_back-SystemCall |
| 61a21e98 | 500 | cmplw 0,r0,r12 /* Check stack overflow */ |
| 343117bf WD |
501 | bgt 1f |
| 502 | stw r12,0(r20) | |
| 503 | ||
| 504 | mflr r0 | |
| 505 | stw r0,0(r12) | |
| 506 | mfspr r0,SRR0 | |
| 507 | stw r0,4(r12) | |
| 508 | mfspr r0,SRR1 | |
| 509 | stw r0,8(r12) | |
| 510 | ||
| 511 | li r12,0xc00+_back-SystemCall | |
| 512 | mtlr r12 | |
| 513 | mtspr SRR0,r11 | |
| 514 | ||
| 515 | 1: SYNC | |
| 42d1f039 WD |
516 | rfi |
| 517 | _back: | |
| 518 | ||
| 343117bf WD |
519 | mfmsr r11 /* Disable interrupts */ |
| 520 | li r12,0 | |
| 521 | ori r12,r12,MSR_EE | |
| 522 | andc r11,r11,r12 | |
| 523 | SYNC /* Some chip revs need this... */ | |
| 524 | mtmsr r11 | |
| 42d1f039 WD |
525 | SYNC |
| 526 | ||
| 343117bf WD |
527 | li r12,0xd00-4 /* restore regs */ |
| 528 | lwz r12,0(r12) | |
| 42d1f039 | 529 | |
| 343117bf WD |
530 | lwz r11,0(r12) |
| 531 | mtlr r11 | |
| 532 | lwz r11,4(r12) | |
| 533 | mtspr SRR0,r11 | |
| 534 | lwz r11,8(r12) | |
| 535 | mtspr SRR1,r11 | |
| 42d1f039 | 536 | |
| 343117bf WD |
537 | addi r12,r12,12 /* Adjust stack pointer */ |
| 538 | li r20,0xd00-4 | |
| 539 | stw r12,0(r20) | |
| 42d1f039 WD |
540 | |
| 541 | SYNC | |
| 542 | rfi | |
| 543 | _end_back: | |
| 544 | ||
| 343117bf WD |
545 | STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt) |
| 546 | STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException) | |
| 547 | STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException) | |
| 42d1f039 | 548 | |
| 343117bf WD |
549 | STD_EXCEPTION(0x0d00, DataTLBError, UnknownException) |
| 550 | STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException) | |
| 42d1f039 | 551 | |
| 343117bf | 552 | CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException ) |
| 42d1f039 | 553 | |
| 343117bf | 554 | .globl _end_of_vectors |
| 42d1f039 WD |
555 | _end_of_vectors: |
| 556 | ||
| 557 | ||
| 61a21e98 | 558 | . = . + (0x100 - ( . & 0xff )) /* align for debug */ |
| 42d1f039 WD |
559 | |
| 560 | /* | |
| 561 | * This code finishes saving the registers to the exception frame | |
| 562 | * and jumps to the appropriate handler for the exception. | |
| 563 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
| 564 | */ | |
| 565 | .globl transfer_to_handler | |
| 566 | transfer_to_handler: | |
| 567 | stw r22,_NIP(r21) | |
| 568 | lis r22,MSR_POW@h | |
| 569 | andc r23,r23,r22 | |
| 570 | stw r23,_MSR(r21) | |
| 571 | SAVE_GPR(7, r21) | |
| 572 | SAVE_4GPRS(8, r21) | |
| 573 | SAVE_8GPRS(12, r21) | |
| 574 | SAVE_8GPRS(24, r21) | |
| 575 | ||
| 576 | mflr r23 | |
| 577 | andi. r24,r23,0x3f00 /* get vector offset */ | |
| 578 | stw r24,TRAP(r21) | |
| 579 | li r22,0 | |
| 580 | stw r22,RESULT(r21) | |
| 581 | mtspr SPRG2,r22 /* r1 is now kernel sp */ | |
| 582 | ||
| 583 | lwz r24,0(r23) /* virtual address of handler */ | |
| 584 | lwz r23,4(r23) /* where to go when done */ | |
| 585 | mtspr SRR0,r24 | |
| 586 | mtspr SRR1,r20 | |
| 587 | mtlr r23 | |
| 588 | SYNC | |
| 589 | rfi /* jump to handler, enable MMU */ | |
| 590 | ||
| 591 | int_return: | |
| 592 | mfmsr r28 /* Disable interrupts */ | |
| 593 | li r4,0 | |
| 594 | ori r4,r4,MSR_EE | |
| 595 | andc r28,r28,r4 | |
| 596 | SYNC /* Some chip revs need this... */ | |
| 597 | mtmsr r28 | |
| 598 | SYNC | |
| 599 | lwz r2,_CTR(r1) | |
| 600 | lwz r0,_LINK(r1) | |
| 601 | mtctr r2 | |
| 602 | mtlr r0 | |
| 603 | lwz r2,_XER(r1) | |
| 604 | lwz r0,_CCR(r1) | |
| 605 | mtspr XER,r2 | |
| 606 | mtcrf 0xFF,r0 | |
| 607 | REST_10GPRS(3, r1) | |
| 608 | REST_10GPRS(13, r1) | |
| 609 | REST_8GPRS(23, r1) | |
| 610 | REST_GPR(31, r1) | |
| 611 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 612 | lwz r0,_MSR(r1) | |
| 613 | mtspr SRR0,r2 | |
| 614 | mtspr SRR1,r0 | |
| 615 | lwz r0,GPR0(r1) | |
| 616 | lwz r2,GPR2(r1) | |
| 617 | lwz r1,GPR1(r1) | |
| 618 | SYNC | |
| 619 | rfi | |
| 620 | ||
| 621 | crit_return: | |
| 622 | mfmsr r28 /* Disable interrupts */ | |
| 623 | li r4,0 | |
| 624 | ori r4,r4,MSR_EE | |
| 625 | andc r28,r28,r4 | |
| 626 | SYNC /* Some chip revs need this... */ | |
| 627 | mtmsr r28 | |
| 628 | SYNC | |
| 629 | lwz r2,_CTR(r1) | |
| 630 | lwz r0,_LINK(r1) | |
| 631 | mtctr r2 | |
| 632 | mtlr r0 | |
| 633 | lwz r2,_XER(r1) | |
| 634 | lwz r0,_CCR(r1) | |
| 635 | mtspr XER,r2 | |
| 636 | mtcrf 0xFF,r0 | |
| 637 | REST_10GPRS(3, r1) | |
| 638 | REST_10GPRS(13, r1) | |
| 639 | REST_8GPRS(23, r1) | |
| 640 | REST_GPR(31, r1) | |
| 641 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 642 | lwz r0,_MSR(r1) | |
| 61a21e98 AF |
643 | mtspr SPRN_CSRR0,r2 |
| 644 | mtspr SPRN_CSRR1,r0 | |
| 42d1f039 WD |
645 | lwz r0,GPR0(r1) |
| 646 | lwz r2,GPR2(r1) | |
| 647 | lwz r1,GPR1(r1) | |
| 648 | SYNC | |
| 649 | rfci | |
| 650 | ||
| 61a21e98 AF |
651 | mck_return: |
| 652 | mfmsr r28 /* Disable interrupts */ | |
| 653 | li r4,0 | |
| 654 | ori r4,r4,MSR_EE | |
| 655 | andc r28,r28,r4 | |
| 656 | SYNC /* Some chip revs need this... */ | |
| 657 | mtmsr r28 | |
| 658 | SYNC | |
| 659 | lwz r2,_CTR(r1) | |
| 660 | lwz r0,_LINK(r1) | |
| 661 | mtctr r2 | |
| 662 | mtlr r0 | |
| 663 | lwz r2,_XER(r1) | |
| 664 | lwz r0,_CCR(r1) | |
| 665 | mtspr XER,r2 | |
| 666 | mtcrf 0xFF,r0 | |
| 667 | REST_10GPRS(3, r1) | |
| 668 | REST_10GPRS(13, r1) | |
| 669 | REST_8GPRS(23, r1) | |
| 670 | REST_GPR(31, r1) | |
| 671 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 672 | lwz r0,_MSR(r1) | |
| 673 | mtspr SPRN_MCSRR0,r2 | |
| 674 | mtspr SPRN_MCSRR1,r0 | |
| 675 | lwz r0,GPR0(r1) | |
| 676 | lwz r2,GPR2(r1) | |
| 677 | lwz r1,GPR1(r1) | |
| 678 | SYNC | |
| 679 | rfmci | |
| 680 | ||
| 42d1f039 WD |
681 | /* Cache functions. |
| 682 | */ | |
| 54e091d3 | 683 | .globl invalidate_icache |
| 42d1f039 WD |
684 | invalidate_icache: |
| 685 | mfspr r0,L1CSR1 | |
| 61a21e98 AF |
686 | ori r0,r0,L1CSR1_ICFI |
| 687 | msync | |
| 688 | isync | |
| 42d1f039 WD |
689 | mtspr L1CSR1,r0 |
| 690 | isync | |
| 61a21e98 | 691 | blr /* entire I cache */ |
| 42d1f039 | 692 | |
| 54e091d3 | 693 | .globl invalidate_dcache |
| 42d1f039 WD |
694 | invalidate_dcache: |
| 695 | mfspr r0,L1CSR0 | |
| 61a21e98 | 696 | ori r0,r0,L1CSR0_DCFI |
| 42d1f039 WD |
697 | msync |
| 698 | isync | |
| 699 | mtspr L1CSR0,r0 | |
| 700 | isync | |
| 701 | blr | |
| 702 | ||
| 703 | .globl icache_enable | |
| 704 | icache_enable: | |
| 705 | mflr r8 | |
| 706 | bl invalidate_icache | |
| 707 | mtlr r8 | |
| 708 | isync | |
| 709 | mfspr r4,L1CSR1 | |
| 710 | ori r4,r4,0x0001 | |
| 711 | oris r4,r4,0x0001 | |
| 712 | mtspr L1CSR1,r4 | |
| 713 | isync | |
| 714 | blr | |
| 715 | ||
| 716 | .globl icache_disable | |
| 717 | icache_disable: | |
| 718 | mfspr r0,L1CSR1 | |
| 61a21e98 AF |
719 | lis r3,0 |
| 720 | ori r3,r3,L1CSR1_ICE | |
| 721 | andc r0,r0,r3 | |
| 42d1f039 WD |
722 | mtspr L1CSR1,r0 |
| 723 | isync | |
| 724 | blr | |
| 725 | ||
| 726 | .globl icache_status | |
| 727 | icache_status: | |
| 728 | mfspr r3,L1CSR1 | |
| 61a21e98 | 729 | andi. r3,r3,L1CSR1_ICE |
| 42d1f039 WD |
730 | blr |
| 731 | ||
| 732 | .globl dcache_enable | |
| 733 | dcache_enable: | |
| 734 | mflr r8 | |
| 735 | bl invalidate_dcache | |
| 736 | mtlr r8 | |
| 737 | isync | |
| 738 | mfspr r0,L1CSR0 | |
| 739 | ori r0,r0,0x0001 | |
| 740 | oris r0,r0,0x0001 | |
| 741 | msync | |
| 742 | isync | |
| 743 | mtspr L1CSR0,r0 | |
| 744 | isync | |
| 745 | blr | |
| 746 | ||
| 747 | .globl dcache_disable | |
| 748 | dcache_disable: | |
| 61a21e98 AF |
749 | mfspr r3,L1CSR0 |
| 750 | lis r4,0 | |
| 751 | ori r4,r4,L1CSR0_DCE | |
| 752 | andc r3,r3,r4 | |
| 42d1f039 WD |
753 | mtspr L1CSR0,r0 |
| 754 | isync | |
| 755 | blr | |
| 756 | ||
| 757 | .globl dcache_status | |
| 758 | dcache_status: | |
| 759 | mfspr r3,L1CSR0 | |
| 61a21e98 | 760 | andi. r3,r3,L1CSR0_DCE |
| 42d1f039 WD |
761 | blr |
| 762 | ||
| 763 | .globl get_pir | |
| 764 | get_pir: | |
| 61a21e98 | 765 | mfspr r3,PIR |
| 42d1f039 WD |
766 | blr |
| 767 | ||
| 768 | .globl get_pvr | |
| 769 | get_pvr: | |
| 61a21e98 | 770 | mfspr r3,PVR |
| 42d1f039 WD |
771 | blr |
| 772 | ||
| 97d80fc3 WD |
773 | .globl get_svr |
| 774 | get_svr: | |
| 61a21e98 | 775 | mfspr r3,SVR |
| 97d80fc3 WD |
776 | blr |
| 777 | ||
| 42d1f039 WD |
778 | .globl wr_tcr |
| 779 | wr_tcr: | |
| 61a21e98 | 780 | mtspr TCR,r3 |
| 42d1f039 WD |
781 | blr |
| 782 | ||
| 783 | /*------------------------------------------------------------------------------- */ | |
| 784 | /* Function: in8 */ | |
| 785 | /* Description: Input 8 bits */ | |
| 786 | /*------------------------------------------------------------------------------- */ | |
| 787 | .globl in8 | |
| 788 | in8: | |
| 789 | lbz r3,0x0000(r3) | |
| 790 | blr | |
| 791 | ||
| 792 | /*------------------------------------------------------------------------------- */ | |
| 793 | /* Function: out8 */ | |
| 794 | /* Description: Output 8 bits */ | |
| 795 | /*------------------------------------------------------------------------------- */ | |
| 796 | .globl out8 | |
| 797 | out8: | |
| 798 | stb r4,0x0000(r3) | |
| 1487adbd | 799 | sync |
| 42d1f039 WD |
800 | blr |
| 801 | ||
| 802 | /*------------------------------------------------------------------------------- */ | |
| 803 | /* Function: out16 */ | |
| 804 | /* Description: Output 16 bits */ | |
| 805 | /*------------------------------------------------------------------------------- */ | |
| 806 | .globl out16 | |
| 807 | out16: | |
| 808 | sth r4,0x0000(r3) | |
| 1487adbd | 809 | sync |
| 42d1f039 WD |
810 | blr |
| 811 | ||
| 812 | /*------------------------------------------------------------------------------- */ | |
| 813 | /* Function: out16r */ | |
| 814 | /* Description: Byte reverse and output 16 bits */ | |
| 815 | /*------------------------------------------------------------------------------- */ | |
| 816 | .globl out16r | |
| 817 | out16r: | |
| 818 | sthbrx r4,r0,r3 | |
| 1487adbd | 819 | sync |
| 42d1f039 WD |
820 | blr |
| 821 | ||
| 822 | /*------------------------------------------------------------------------------- */ | |
| 823 | /* Function: out32 */ | |
| 824 | /* Description: Output 32 bits */ | |
| 825 | /*------------------------------------------------------------------------------- */ | |
| 826 | .globl out32 | |
| 827 | out32: | |
| 828 | stw r4,0x0000(r3) | |
| 1487adbd | 829 | sync |
| 42d1f039 WD |
830 | blr |
| 831 | ||
| 832 | /*------------------------------------------------------------------------------- */ | |
| 833 | /* Function: out32r */ | |
| 834 | /* Description: Byte reverse and output 32 bits */ | |
| 835 | /*------------------------------------------------------------------------------- */ | |
| 836 | .globl out32r | |
| 837 | out32r: | |
| 838 | stwbrx r4,r0,r3 | |
| 1487adbd | 839 | sync |
| 42d1f039 WD |
840 | blr |
| 841 | ||
| 842 | /*------------------------------------------------------------------------------- */ | |
| 843 | /* Function: in16 */ | |
| 844 | /* Description: Input 16 bits */ | |
| 845 | /*------------------------------------------------------------------------------- */ | |
| 846 | .globl in16 | |
| 847 | in16: | |
| 848 | lhz r3,0x0000(r3) | |
| 849 | blr | |
| 850 | ||
| 851 | /*------------------------------------------------------------------------------- */ | |
| 852 | /* Function: in16r */ | |
| 853 | /* Description: Input 16 bits and byte reverse */ | |
| 854 | /*------------------------------------------------------------------------------- */ | |
| 855 | .globl in16r | |
| 856 | in16r: | |
| 857 | lhbrx r3,r0,r3 | |
| 858 | blr | |
| 859 | ||
| 860 | /*------------------------------------------------------------------------------- */ | |
| 861 | /* Function: in32 */ | |
| 862 | /* Description: Input 32 bits */ | |
| 863 | /*------------------------------------------------------------------------------- */ | |
| 864 | .globl in32 | |
| 865 | in32: | |
| 866 | lwz 3,0x0000(3) | |
| 867 | blr | |
| 868 | ||
| 869 | /*------------------------------------------------------------------------------- */ | |
| 870 | /* Function: in32r */ | |
| 871 | /* Description: Input 32 bits and byte reverse */ | |
| 872 | /*------------------------------------------------------------------------------- */ | |
| 873 | .globl in32r | |
| 874 | in32r: | |
| 875 | lwbrx r3,r0,r3 | |
| 876 | blr | |
| 7da53351 | 877 | #endif /* !CONFIG_NAND_SPL */ |
| 42d1f039 | 878 | |
| 42d1f039 WD |
879 | /*------------------------------------------------------------------------------*/ |
| 880 | ||
| d30f9043 KG |
881 | /* |
| 882 | * void write_tlb(mas0, mas1, mas2, mas3, mas7) | |
| 883 | */ | |
| 884 | .globl write_tlb | |
| 885 | write_tlb: | |
| 886 | mtspr MAS0,r3 | |
| 887 | mtspr MAS1,r4 | |
| 888 | mtspr MAS2,r5 | |
| 889 | mtspr MAS3,r6 | |
| 890 | #ifdef CONFIG_ENABLE_36BIT_PHYS | |
| 891 | mtspr MAS7,r7 | |
| 892 | #endif | |
| 893 | li r3,0 | |
| 894 | #ifdef CONFIG_SYS_BOOK3E_HV | |
| 895 | mtspr MAS8,r3 | |
| 896 | #endif | |
| 897 | isync | |
| 898 | tlbwe | |
| 899 | msync | |
| 900 | isync | |
| 901 | blr | |
| 902 | ||
| 42d1f039 WD |
903 | /* |
| 904 | * void relocate_code (addr_sp, gd, addr_moni) | |
| 905 | * | |
| 906 | * This "function" does not return, instead it continues in RAM | |
| 907 | * after relocating the monitor code. | |
| 908 | * | |
| 909 | * r3 = dest | |
| 910 | * r4 = src | |
| 911 | * r5 = length in bytes | |
| 912 | * r6 = cachelinesize | |
| 913 | */ | |
| 914 | .globl relocate_code | |
| 915 | relocate_code: | |
| 61a21e98 AF |
916 | mr r1,r3 /* Set new stack pointer */ |
| 917 | mr r9,r4 /* Save copy of Init Data pointer */ | |
| 918 | mr r10,r5 /* Save copy of Destination Address */ | |
| 42d1f039 | 919 | |
| 0f8aa159 | 920 | GET_GOT |
| 61a21e98 | 921 | mr r3,r5 /* Destination Address */ |
| 6d0f6bcf JCPV |
922 | lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
| 923 | ori r4,r4,CONFIG_SYS_MONITOR_BASE@l | |
| 42d1f039 WD |
924 | lwz r5,GOT(__init_end) |
| 925 | sub r5,r5,r4 | |
| 6d0f6bcf | 926 | li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */ |
| 42d1f039 WD |
927 | |
| 928 | /* | |
| 929 | * Fix GOT pointer: | |
| 930 | * | |
| 6d0f6bcf | 931 | * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address |
| 42d1f039 WD |
932 | * |
| 933 | * Offset: | |
| 934 | */ | |
| 61a21e98 | 935 | sub r15,r10,r4 |
| 42d1f039 WD |
936 | |
| 937 | /* First our own GOT */ | |
| 0f8aa159 | 938 | add r12,r12,r15 |
| 42d1f039 | 939 | /* the the one used by the C code */ |
| 61a21e98 | 940 | add r30,r30,r15 |
| 42d1f039 WD |
941 | |
| 942 | /* | |
| 943 | * Now relocate code | |
| 944 | */ | |
| 945 | ||
| 946 | cmplw cr1,r3,r4 | |
| 947 | addi r0,r5,3 | |
| 948 | srwi. r0,r0,2 | |
| 949 | beq cr1,4f /* In place copy is not necessary */ | |
| 950 | beq 7f /* Protect against 0 count */ | |
| 951 | mtctr r0 | |
| 952 | bge cr1,2f | |
| 953 | ||
| 954 | la r8,-4(r4) | |
| 955 | la r7,-4(r3) | |
| 956 | 1: lwzu r0,4(r8) | |
| 957 | stwu r0,4(r7) | |
| 958 | bdnz 1b | |
| 959 | b 4f | |
| 960 | ||
| 961 | 2: slwi r0,r0,2 | |
| 962 | add r8,r4,r0 | |
| 963 | add r7,r3,r0 | |
| 964 | 3: lwzu r0,-4(r8) | |
| 965 | stwu r0,-4(r7) | |
| 966 | bdnz 3b | |
| 967 | ||
| 968 | /* | |
| 969 | * Now flush the cache: note that we must start from a cache aligned | |
| 970 | * address. Otherwise we might miss one cache line. | |
| 971 | */ | |
| 972 | 4: cmpwi r6,0 | |
| 973 | add r5,r3,r5 | |
| 974 | beq 7f /* Always flush prefetch queue in any case */ | |
| 975 | subi r0,r6,1 | |
| 976 | andc r3,r3,r0 | |
| 977 | mr r4,r3 | |
| 978 | 5: dcbst 0,r4 | |
| 979 | add r4,r4,r6 | |
| 980 | cmplw r4,r5 | |
| 981 | blt 5b | |
| 982 | sync /* Wait for all dcbst to complete on bus */ | |
| 983 | mr r4,r3 | |
| 984 | 6: icbi 0,r4 | |
| 985 | add r4,r4,r6 | |
| 986 | cmplw r4,r5 | |
| 987 | blt 6b | |
| 988 | 7: sync /* Wait for all icbi to complete on bus */ | |
| 989 | isync | |
| 990 | ||
| 7d314992 WD |
991 | /* |
| 992 | * Re-point the IVPR at RAM | |
| 993 | */ | |
| 994 | mtspr IVPR,r10 | |
| 99b0d285 | 995 | |
| 42d1f039 WD |
996 | /* |
| 997 | * We are done. Do not return, instead branch to second part of board | |
| 998 | * initialization, now running from RAM. | |
| 999 | */ | |
| 1000 | ||
| 61a21e98 | 1001 | addi r0,r10,in_ram - _start + _START_OFFSET |
| 42d1f039 WD |
1002 | mtlr r0 |
| 1003 | blr /* NEVER RETURNS! */ | |
| 61a21e98 | 1004 | .globl in_ram |
| 42d1f039 WD |
1005 | in_ram: |
| 1006 | ||
| 1007 | /* | |
| 0f8aa159 | 1008 | * Relocation Function, r12 point to got2+0x8000 |
| 42d1f039 WD |
1009 | * |
| 1010 | * Adjust got2 pointers, no need to check for 0, this code | |
| 1011 | * already puts a few entries in the table. | |
| 1012 | */ | |
| 1013 | li r0,__got2_entries@sectoff@l | |
| 1014 | la r3,GOT(_GOT2_TABLE_) | |
| 1015 | lwz r11,GOT(_GOT2_TABLE_) | |
| 1016 | mtctr r0 | |
| 1017 | sub r11,r3,r11 | |
| 1018 | addi r3,r3,-4 | |
| 1019 | 1: lwzu r0,4(r3) | |
| afc3ba0f JT |
1020 | cmpwi r0,0 |
| 1021 | beq- 2f | |
| 42d1f039 WD |
1022 | add r0,r0,r11 |
| 1023 | stw r0,0(r3) | |
| afc3ba0f | 1024 | 2: bdnz 1b |
| 42d1f039 WD |
1025 | |
| 1026 | /* | |
| 1027 | * Now adjust the fixups and the pointers to the fixups | |
| 1028 | * in case we need to move ourselves again. | |
| 1029 | */ | |
| afc3ba0f | 1030 | li r0,__fixup_entries@sectoff@l |
| 42d1f039 WD |
1031 | lwz r3,GOT(_FIXUP_TABLE_) |
| 1032 | cmpwi r0,0 | |
| 1033 | mtctr r0 | |
| 1034 | addi r3,r3,-4 | |
| 1035 | beq 4f | |
| 1036 | 3: lwzu r4,4(r3) | |
| 1037 | lwzux r0,r4,r11 | |
| 1038 | add r0,r0,r11 | |
| 1039 | stw r10,0(r3) | |
| 1040 | stw r0,0(r4) | |
| 1041 | bdnz 3b | |
| 1042 | 4: | |
| 1043 | clear_bss: | |
| 1044 | /* | |
| 1045 | * Now clear BSS segment | |
| 1046 | */ | |
| 1047 | lwz r3,GOT(__bss_start) | |
| 1048 | lwz r4,GOT(_end) | |
| 1049 | ||
| 61a21e98 | 1050 | cmplw 0,r3,r4 |
| 42d1f039 WD |
1051 | beq 6f |
| 1052 | ||
| 61a21e98 | 1053 | li r0,0 |
| 42d1f039 | 1054 | 5: |
| 61a21e98 AF |
1055 | stw r0,0(r3) |
| 1056 | addi r3,r3,4 | |
| 1057 | cmplw 0,r3,r4 | |
| 42d1f039 WD |
1058 | bne 5b |
| 1059 | 6: | |
| 1060 | ||
| 61a21e98 AF |
1061 | mr r3,r9 /* Init Data pointer */ |
| 1062 | mr r4,r10 /* Destination Address */ | |
| 42d1f039 WD |
1063 | bl board_init_r |
| 1064 | ||
| 7da53351 | 1065 | #ifndef CONFIG_NAND_SPL |
| 42d1f039 WD |
1066 | /* |
| 1067 | * Copy exception vector code to low memory | |
| 1068 | * | |
| 1069 | * r3: dest_addr | |
| 1070 | * r7: source address, r8: end address, r9: target address | |
| 1071 | */ | |
| 343117bf | 1072 | .globl trap_init |
| 42d1f039 | 1073 | trap_init: |
| 0f8aa159 JT |
1074 | mflr r4 /* save link register */ |
| 1075 | GET_GOT | |
| 61a21e98 AF |
1076 | lwz r7,GOT(_start_of_vectors) |
| 1077 | lwz r8,GOT(_end_of_vectors) | |
| 42d1f039 | 1078 | |
| 61a21e98 | 1079 | li r9,0x100 /* reset vector always at 0x100 */ |
| 42d1f039 | 1080 | |
| 61a21e98 | 1081 | cmplw 0,r7,r8 |
| 343117bf | 1082 | bgelr /* return if r7>=r8 - just in case */ |
| 42d1f039 | 1083 | 1: |
| 61a21e98 AF |
1084 | lwz r0,0(r7) |
| 1085 | stw r0,0(r9) | |
| 1086 | addi r7,r7,4 | |
| 1087 | addi r9,r9,4 | |
| 1088 | cmplw 0,r7,r8 | |
| 343117bf | 1089 | bne 1b |
| 42d1f039 WD |
1090 | |
| 1091 | /* | |
| 1092 | * relocate `hdlr' and `int_return' entries | |
| 1093 | */ | |
| 61a21e98 | 1094 | li r7,.L_CriticalInput - _start + _START_OFFSET |
| 343117bf | 1095 | bl trap_reloc |
| 61a21e98 | 1096 | li r7,.L_MachineCheck - _start + _START_OFFSET |
| 343117bf | 1097 | bl trap_reloc |
| 61a21e98 | 1098 | li r7,.L_DataStorage - _start + _START_OFFSET |
| 343117bf | 1099 | bl trap_reloc |
| 61a21e98 | 1100 | li r7,.L_InstStorage - _start + _START_OFFSET |
| 343117bf | 1101 | bl trap_reloc |
| 61a21e98 | 1102 | li r7,.L_ExtInterrupt - _start + _START_OFFSET |
| 343117bf | 1103 | bl trap_reloc |
| 61a21e98 | 1104 | li r7,.L_Alignment - _start + _START_OFFSET |
| 343117bf | 1105 | bl trap_reloc |
| 61a21e98 | 1106 | li r7,.L_ProgramCheck - _start + _START_OFFSET |
| 343117bf | 1107 | bl trap_reloc |
| 61a21e98 | 1108 | li r7,.L_FPUnavailable - _start + _START_OFFSET |
| 343117bf | 1109 | bl trap_reloc |
| 61a21e98 AF |
1110 | li r7,.L_Decrementer - _start + _START_OFFSET |
| 1111 | bl trap_reloc | |
| 1112 | li r7,.L_IntervalTimer - _start + _START_OFFSET | |
| 1113 | li r8,_end_of_vectors - _start + _START_OFFSET | |
| 42d1f039 | 1114 | 2: |
| 343117bf | 1115 | bl trap_reloc |
| 61a21e98 AF |
1116 | addi r7,r7,0x100 /* next exception vector */ |
| 1117 | cmplw 0,r7,r8 | |
| 343117bf WD |
1118 | blt 2b |
| 1119 | ||
| 1120 | lis r7,0x0 | |
| 61a21e98 | 1121 | mtspr IVPR,r7 |
| 42d1f039 | 1122 | |
| 343117bf | 1123 | mtlr r4 /* restore link register */ |
| 42d1f039 WD |
1124 | blr |
| 1125 | ||
| 42d1f039 WD |
1126 | .globl unlock_ram_in_cache |
| 1127 | unlock_ram_in_cache: | |
| 1128 | /* invalidate the INIT_RAM section */ | |
| a38a5b6e KG |
1129 | lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h |
| 1130 | ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l | |
| b009f3ec KG |
1131 | mfspr r4,L1CFG0 |
| 1132 | andi. r4,r4,0x1ff | |
| 1133 | slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT) | |
| 61a21e98 | 1134 | mtctr r4 |
| 2b22fa4b | 1135 | 1: dcbi r0,r3 |
| 6d0f6bcf | 1136 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
| 42d1f039 | 1137 | bdnz 1b |
| 2b22fa4b | 1138 | sync |
| 21fae8b2 AF |
1139 | |
| 1140 | /* Invalidate the TLB entries for the cache */ | |
| 6d0f6bcf JCPV |
1141 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
| 1142 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
| 21fae8b2 AF |
1143 | tlbivax 0,r3 |
| 1144 | addi r3,r3,0x1000 | |
| 1145 | tlbivax 0,r3 | |
| 1146 | addi r3,r3,0x1000 | |
| 1147 | tlbivax 0,r3 | |
| 1148 | addi r3,r3,0x1000 | |
| 1149 | tlbivax 0,r3 | |
| 42d1f039 WD |
1150 | isync |
| 1151 | blr | |
| 54e091d3 KG |
1152 | |
| 1153 | .globl flush_dcache | |
| 1154 | flush_dcache: | |
| 1155 | mfspr r3,SPRN_L1CFG0 | |
| 1156 | ||
| 1157 | rlwinm r5,r3,9,3 /* Extract cache block size */ | |
| 1158 | twlgti r5,1 /* Only 32 and 64 byte cache blocks | |
| 1159 | * are currently defined. | |
| 1160 | */ | |
| 1161 | li r4,32 | |
| 1162 | subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) - | |
| 1163 | * log2(number of ways) | |
| 1164 | */ | |
| 1165 | slw r5,r4,r5 /* r5 = cache block size */ | |
| 1166 | ||
| 1167 | rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */ | |
| 1168 | mulli r7,r7,13 /* An 8-way cache will require 13 | |
| 1169 | * loads per set. | |
| 1170 | */ | |
| 1171 | slw r7,r7,r6 | |
| 1172 | ||
| 1173 | /* save off HID0 and set DCFA */ | |
| 1174 | mfspr r8,SPRN_HID0 | |
| 1175 | ori r9,r8,HID0_DCFA@l | |
| 1176 | mtspr SPRN_HID0,r9 | |
| 1177 | isync | |
| 1178 | ||
| 1179 | lis r4,0 | |
| 1180 | mtctr r7 | |
| 1181 | ||
| 1182 | 1: lwz r3,0(r4) /* Load... */ | |
| 1183 | add r4,r4,r5 | |
| 1184 | bdnz 1b | |
| 1185 | ||
| 1186 | msync | |
| 1187 | lis r4,0 | |
| 1188 | mtctr r7 | |
| 1189 | ||
| 1190 | 1: dcbf 0,r4 /* ...and flush. */ | |
| 1191 | add r4,r4,r5 | |
| 1192 | bdnz 1b | |
| 1193 | ||
| 1194 | /* restore HID0 */ | |
| 1195 | mtspr SPRN_HID0,r8 | |
| 1196 | isync | |
| 1197 | ||
| 1198 | blr | |
| 26f4cdba KG |
1199 | |
| 1200 | .globl setup_ivors | |
| 1201 | setup_ivors: | |
| 1202 | ||
| 1203 | #include "fixed_ivor.S" | |
| 1204 | blr | |
| 7da53351 | 1205 | #endif /* !CONFIG_NAND_SPL */ |