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 | ||
| 25ddd1fb | 31 | #include <asm-offsets.h> |
| 42d1f039 WD |
32 | #include <config.h> |
| 33 | #include <mpc85xx.h> | |
| 561858ee | 34 | #include <timestamp.h> |
| 42d1f039 WD |
35 | #include <version.h> |
| 36 | ||
| 37 | #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ | |
| 38 | ||
| 39 | #include <ppc_asm.tmpl> | |
| 40 | #include <ppc_defs.h> | |
| 41 | ||
| 42 | #include <asm/cache.h> | |
| 43 | #include <asm/mmu.h> | |
| 44 | ||
| 45 | #ifndef CONFIG_IDENT_STRING | |
| 46 | #define CONFIG_IDENT_STRING "" | |
| 47 | #endif | |
| 48 | ||
| 49 | #undef MSR_KERNEL | |
| 61a21e98 | 50 | #define MSR_KERNEL ( MSR_ME ) /* Machine Check */ |
| 42d1f039 WD |
51 | |
| 52 | /* | |
| 53 | * Set up GOT: Global Offset Table | |
| 54 | * | |
| 0f8aa159 | 55 | * Use r12 to access the GOT |
| 42d1f039 WD |
56 | */ |
| 57 | START_GOT | |
| 58 | GOT_ENTRY(_GOT2_TABLE_) | |
| 59 | GOT_ENTRY(_FIXUP_TABLE_) | |
| 60 | ||
| 7da53351 | 61 | #ifndef CONFIG_NAND_SPL |
| 42d1f039 WD |
62 | GOT_ENTRY(_start) |
| 63 | GOT_ENTRY(_start_of_vectors) | |
| 64 | GOT_ENTRY(_end_of_vectors) | |
| 65 | GOT_ENTRY(transfer_to_handler) | |
| 7da53351 | 66 | #endif |
| 42d1f039 WD |
67 | |
| 68 | GOT_ENTRY(__init_end) | |
| 69 | GOT_ENTRY(_end) | |
| 70 | GOT_ENTRY(__bss_start) | |
| 71 | END_GOT | |
| 72 | ||
| 73 | /* | |
| 74 | * e500 Startup -- after reset only the last 4KB of the effective | |
| 75 | * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg | |
| 76 | * section is located at THIS LAST page and basically does three | |
| 77 | * things: clear some registers, set up exception tables and | |
| 78 | * add more TLB entries for 'larger spaces'(e.g. the boot rom) to | |
| 79 | * continue the boot procedure. | |
| 80 | ||
| 81 | * Once the boot rom is mapped by TLB entries we can proceed | |
| 82 | * with normal startup. | |
| 83 | * | |
| 84 | */ | |
| 85 | ||
| 61a21e98 AF |
86 | .section .bootpg,"ax" |
| 87 | .globl _start_e500 | |
| 42d1f039 WD |
88 | |
| 89 | _start_e500: | |
| 97d80fc3 | 90 | |
| 61a21e98 | 91 | /* clear registers/arrays not reset by hardware */ |
| 42d1f039 | 92 | |
| 61a21e98 AF |
93 | /* L1 */ |
| 94 | li r0,2 | |
| 95 | mtspr L1CSR0,r0 /* invalidate d-cache */ | |
| 53677ef1 | 96 | mtspr L1CSR1,r0 /* invalidate i-cache */ |
| 42d1f039 WD |
97 | |
| 98 | mfspr r1,DBSR | |
| 99 | mtspr DBSR,r1 /* Clear all valid bits */ | |
| 100 | ||
| 61a21e98 AF |
101 | /* |
| 102 | * Enable L1 Caches early | |
| 103 | * | |
| 104 | */ | |
| 42d1f039 | 105 | |
| 82fd1f8d KG |
106 | #if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING) |
| 107 | /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */ | |
| 108 | li r2,(32 + 0) | |
| 109 | mtspr L1CSR2,r2 | |
| 110 | #endif | |
| 111 | ||
| 33f57bd5 KG |
112 | /* Enable/invalidate the I-Cache */ |
| 113 | lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h | |
| 114 | ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l | |
| 115 | mtspr SPRN_L1CSR1,r2 | |
| 116 | 1: | |
| 117 | mfspr r3,SPRN_L1CSR1 | |
| 118 | and. r1,r3,r2 | |
| 119 | bne 1b | |
| 120 | ||
| 121 | lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h | |
| 122 | ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l | |
| 123 | mtspr SPRN_L1CSR1,r3 | |
| 61a21e98 | 124 | isync |
| 33f57bd5 KG |
125 | 2: |
| 126 | mfspr r3,SPRN_L1CSR1 | |
| 127 | andi. r1,r3,L1CSR1_ICE@l | |
| 128 | beq 2b | |
| 129 | ||
| 130 | /* Enable/invalidate the D-Cache */ | |
| 131 | lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h | |
| 132 | ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l | |
| 133 | mtspr SPRN_L1CSR0,r2 | |
| 134 | 1: | |
| 135 | mfspr r3,SPRN_L1CSR0 | |
| 136 | and. r1,r3,r2 | |
| 137 | bne 1b | |
| 138 | ||
| 139 | lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h | |
| 140 | ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l | |
| 141 | mtspr SPRN_L1CSR0,r3 | |
| 42d1f039 | 142 | isync |
| 33f57bd5 KG |
143 | 2: |
| 144 | mfspr r3,SPRN_L1CSR0 | |
| 145 | andi. r1,r3,L1CSR0_DCE@l | |
| 146 | beq 2b | |
| 42d1f039 WD |
147 | |
| 148 | /* Setup interrupt vectors */ | |
| 0635b09c | 149 | lis r1,CONFIG_SYS_MONITOR_BASE@h |
| 61a21e98 | 150 | mtspr IVPR,r1 |
| 42d1f039 | 151 | |
| 343117bf | 152 | li r1,0x0100 |
| 42d1f039 | 153 | mtspr IVOR0,r1 /* 0: Critical input */ |
| 343117bf | 154 | li r1,0x0200 |
| 42d1f039 | 155 | mtspr IVOR1,r1 /* 1: Machine check */ |
| 343117bf | 156 | li r1,0x0300 |
| 42d1f039 | 157 | mtspr IVOR2,r1 /* 2: Data storage */ |
| 343117bf | 158 | li r1,0x0400 |
| 42d1f039 WD |
159 | mtspr IVOR3,r1 /* 3: Instruction storage */ |
| 160 | li r1,0x0500 | |
| 161 | mtspr IVOR4,r1 /* 4: External interrupt */ | |
| 162 | li r1,0x0600 | |
| 163 | mtspr IVOR5,r1 /* 5: Alignment */ | |
| 164 | li r1,0x0700 | |
| 165 | mtspr IVOR6,r1 /* 6: Program check */ | |
| 166 | li r1,0x0800 | |
| 167 | mtspr IVOR7,r1 /* 7: floating point unavailable */ | |
| 343117bf | 168 | li r1,0x0900 |
| 42d1f039 WD |
169 | mtspr IVOR8,r1 /* 8: System call */ |
| 170 | /* 9: Auxiliary processor unavailable(unsupported) */ | |
| 343117bf | 171 | li r1,0x0a00 |
| 42d1f039 | 172 | mtspr IVOR10,r1 /* 10: Decrementer */ |
| 343117bf WD |
173 | li r1,0x0b00 |
| 174 | mtspr IVOR11,r1 /* 11: Interval timer */ | |
| 175 | li r1,0x0c00 | |
| 3e0bc447 WD |
176 | mtspr IVOR12,r1 /* 12: Watchdog timer */ |
| 177 | li r1,0x0d00 | |
| 42d1f039 | 178 | mtspr IVOR13,r1 /* 13: Data TLB error */ |
| 343117bf | 179 | li r1,0x0e00 |
| 42d1f039 | 180 | mtspr IVOR14,r1 /* 14: Instruction TLB error */ |
| 343117bf | 181 | li r1,0x0f00 |
| 42d1f039 WD |
182 | mtspr IVOR15,r1 /* 15: Debug */ |
| 183 | ||
| 42d1f039 | 184 | /* Clear and set up some registers. */ |
| 87163180 | 185 | li r0,0x0000 |
| 42d1f039 WD |
186 | lis r1,0xffff |
| 187 | mtspr DEC,r0 /* prevent dec exceptions */ | |
| 188 | mttbl r0 /* prevent fit & wdt exceptions */ | |
| 189 | mttbu r0 | |
| 190 | mtspr TSR,r1 /* clear all timer exception status */ | |
| 191 | mtspr TCR,r0 /* disable all */ | |
| 192 | mtspr ESR,r0 /* clear exception syndrome register */ | |
| 193 | mtspr MCSR,r0 /* machine check syndrome register */ | |
| 194 | mtxer r0 /* clear integer exception register */ | |
| 42d1f039 | 195 | |
| dcc87dd5 SW |
196 | #ifdef CONFIG_SYS_BOOK3E_HV |
| 197 | mtspr MAS8,r0 /* make sure MAS8 is clear */ | |
| 198 | #endif | |
| 199 | ||
| 42d1f039 | 200 | /* Enable Time Base and Select Time Base Clock */ |
| 0ac6f8b7 | 201 | lis r0,HID0_EMCP@h /* Enable machine check */ |
| d9b94f28 | 202 | #if defined(CONFIG_ENABLE_36BIT_PHYS) |
| 87163180 | 203 | ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */ |
| d9b94f28 | 204 | #endif |
| 1b3e4044 | 205 | #ifndef CONFIG_E500MC |
| 87163180 | 206 | ori r0,r0,HID0_TBEN@l /* Enable Timebase */ |
| 1b3e4044 | 207 | #endif |
| 42d1f039 | 208 | mtspr HID0,r0 |
| 42d1f039 | 209 | |
| 0f060c3b | 210 | #ifndef CONFIG_E500MC |
| 61a21e98 | 211 | li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ |
| ff8473e9 SG |
212 | mfspr r3,PVR |
| 213 | andi. r3,r3, 0xff | |
| 214 | cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */ | |
| 215 | blt 1f | |
| 216 | /* Set MBDD bit also */ | |
| 217 | ori r0, r0, HID1_MBDD@l | |
| 218 | 1: | |
| 42d1f039 | 219 | mtspr HID1,r0 |
| 0f060c3b | 220 | #endif |
| 42d1f039 WD |
221 | |
| 222 | /* Enable Branch Prediction */ | |
| 223 | #if defined(CONFIG_BTB) | |
| 69bcf5bc KG |
224 | lis r0,BUCSR_ENABLE@h |
| 225 | ori r0,r0,BUCSR_ENABLE@l | |
| 226 | mtspr SPRN_BUCSR,r0 | |
| 42d1f039 WD |
227 | #endif |
| 228 | ||
| 6d0f6bcf | 229 | #if defined(CONFIG_SYS_INIT_DBCR) |
| 42d1f039 WD |
230 | lis r1,0xffff |
| 231 | ori r1,r1,0xffff | |
| 0ac6f8b7 | 232 | mtspr DBSR,r1 /* Clear all status bits */ |
| 6d0f6bcf JCPV |
233 | lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */ |
| 234 | ori r0,r0,CONFIG_SYS_INIT_DBCR@l | |
| 0ac6f8b7 | 235 | mtspr DBCR0,r0 |
| 42d1f039 WD |
236 | #endif |
| 237 | ||
| 22b6dbc1 HW |
238 | #ifdef CONFIG_MPC8569 |
| 239 | #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000) | |
| 240 | #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0) | |
| 241 | ||
| 242 | /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to | |
| 243 | * use address space which is more than 12bits, and it must be done in | |
| 244 | * the 4K boot page. So we set this bit here. | |
| 245 | */ | |
| 246 | ||
| 247 | /* create a temp mapping TLB0[0] for LBCR */ | |
| 248 | lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h | |
| 249 | ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l | |
| 250 | ||
| 251 | lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h | |
| 252 | ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l | |
| 253 | ||
| 254 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h | |
| 255 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l | |
| 256 | ||
| 257 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
| 258 | (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 259 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0, | |
| 260 | (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 261 | ||
| 262 | mtspr MAS0,r6 | |
| 263 | mtspr MAS1,r7 | |
| 264 | mtspr MAS2,r8 | |
| 265 | mtspr MAS3,r9 | |
| 266 | isync | |
| 267 | msync | |
| 268 | tlbwe | |
| 269 | ||
| 270 | /* Set LBCR register */ | |
| 271 | lis r4,CONFIG_SYS_LBCR_ADDR@h | |
| 272 | ori r4,r4,CONFIG_SYS_LBCR_ADDR@l | |
| 273 | ||
| 274 | lis r5,CONFIG_SYS_LBC_LBCR@h | |
| 275 | ori r5,r5,CONFIG_SYS_LBC_LBCR@l | |
| 276 | stw r5,0(r4) | |
| 277 | isync | |
| 278 | ||
| 279 | /* invalidate this temp TLB */ | |
| 280 | lis r4,CONFIG_SYS_LBC_ADDR@h | |
| 281 | ori r4,r4,CONFIG_SYS_LBC_ADDR@l | |
| 282 | tlbivax 0,r4 | |
| 283 | isync | |
| 284 | ||
| 285 | #endif /* CONFIG_MPC8569 */ | |
| 286 | ||
| 87163180 KG |
287 | lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h |
| 288 | ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l | |
| 289 | ||
| 7da53351 MH |
290 | #ifndef CONFIG_SYS_RAMBOOT |
| 291 | /* create a temp mapping in AS=1 to the 4M boot window */ | |
| f51f07eb DL |
292 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h |
| 293 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l | |
| 87163180 | 294 | |
| 0635b09c HW |
295 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h |
| 296 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l | |
| 87163180 | 297 | |
| f51f07eb DL |
298 | /* The 85xx has the default boot window 0xff800000 - 0xffffffff */ |
| 299 | lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 300 | ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 7da53351 MH |
301 | #else |
| 302 | /* | |
| 0635b09c HW |
303 | * create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main |
| 304 | * image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage. | |
| 7da53351 MH |
305 | */ |
| 306 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h | |
| 307 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l | |
| 308 | ||
| 0635b09c HW |
309 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h |
| 310 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l | |
| 7da53351 | 311 | |
| 0635b09c HW |
312 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h |
| 313 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 7da53351 | 314 | #endif |
| 87163180 KG |
315 | |
| 316 | mtspr MAS0,r6 | |
| 317 | mtspr MAS1,r7 | |
| 318 | mtspr MAS2,r8 | |
| 319 | mtspr MAS3,r9 | |
| 320 | isync | |
| 321 | msync | |
| 322 | tlbwe | |
| 323 | ||
| 324 | /* create a temp mapping in AS=1 to the stack */ | |
| 325 | lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h | |
| 326 | ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l | |
| 327 | ||
| 328 | lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h | |
| 329 | ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l | |
| 330 | ||
| 6d0f6bcf JCPV |
331 | lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h |
| 332 | ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l | |
| 87163180 | 333 | |
| a3f18529 YS |
334 | #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \ |
| 335 | defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH) | |
| 336 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0, | |
| 337 | (MAS3_SX|MAS3_SW|MAS3_SR))@h | |
| 338 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0, | |
| 339 | (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| 340 | li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH | |
| 341 | mtspr MAS7,r10 | |
| 342 | #else | |
| 6d0f6bcf JCPV |
343 | lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h |
| 344 | ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l | |
| a3f18529 | 345 | #endif |
| 87163180 KG |
346 | |
| 347 | mtspr MAS0,r6 | |
| 348 | mtspr MAS1,r7 | |
| 349 | mtspr MAS2,r8 | |
| 350 | mtspr MAS3,r9 | |
| 351 | isync | |
| 352 | msync | |
| 353 | tlbwe | |
| 354 | ||
| 1b72dbec SW |
355 | lis r6,MSR_IS|MSR_DS@h |
| 356 | ori r6,r6,MSR_IS|MSR_DS@l | |
| 87163180 KG |
357 | lis r7,switch_as@h |
| 358 | ori r7,r7,switch_as@l | |
| 359 | ||
| 360 | mtspr SPRN_SRR0,r7 | |
| 361 | mtspr SPRN_SRR1,r6 | |
| 362 | rfi | |
| 363 | ||
| 364 | switch_as: | |
| 3db0bef5 KG |
365 | /* L1 DCache is used for initial RAM */ |
| 366 | ||
| 367 | /* Allocate Initial RAM in data cache. | |
| 368 | */ | |
| 6d0f6bcf JCPV |
369 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
| 370 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
| b009f3ec KG |
371 | mfspr r2, L1CFG0 |
| 372 | andi. r2, r2, 0x1ff | |
| 373 | /* cache size * 1024 / (2 * L1 line size) */ | |
| 374 | slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT) | |
| 3db0bef5 KG |
375 | mtctr r2 |
| 376 | li r0,0 | |
| 377 | 1: | |
| 378 | dcbz r0,r3 | |
| 379 | dcbtls 0,r0,r3 | |
| 6d0f6bcf | 380 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
| 3db0bef5 KG |
381 | bdnz 1b |
| 382 | ||
| 61a21e98 | 383 | /* Jump out the last 4K page and continue to 'normal' start */ |
| 6d0f6bcf | 384 | #ifdef CONFIG_SYS_RAMBOOT |
| 61a21e98 | 385 | b _start_cont |
| 3db0bef5 KG |
386 | #else |
| 387 | /* Calculate absolute address in FLASH and jump there */ | |
| 388 | /*--------------------------------------------------------------*/ | |
| 6d0f6bcf JCPV |
389 | lis r3,CONFIG_SYS_MONITOR_BASE@h |
| 390 | ori r3,r3,CONFIG_SYS_MONITOR_BASE@l | |
| 3db0bef5 KG |
391 | addi r3,r3,_start_cont - _start + _START_OFFSET |
| 392 | mtlr r3 | |
| 1e701e70 | 393 | blr |
| 3db0bef5 | 394 | #endif |
| 61a21e98 | 395 | |
| 61a21e98 AF |
396 | .text |
| 397 | .globl _start | |
| 398 | _start: | |
| 399 | .long 0x27051956 /* U-BOOT Magic Number */ | |
| 400 | .globl version_string | |
| 401 | version_string: | |
| 402 | .ascii U_BOOT_VERSION | |
| 561858ee | 403 | .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" |
| 61a21e98 AF |
404 | .ascii CONFIG_IDENT_STRING, "\0" |
| 405 | ||
| 406 | .align 4 | |
| 407 | .globl _start_cont | |
| 408 | _start_cont: | |
| 42d1f039 | 409 | /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/ |
| 6d0f6bcf JCPV |
410 | lis r1,CONFIG_SYS_INIT_RAM_ADDR@h |
| 411 | ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l | |
| 42d1f039 WD |
412 | |
| 413 | li r0,0 | |
| 414 | stwu r0,-4(r1) | |
| 415 | stwu r0,-4(r1) /* Terminate call chain */ | |
| 416 | ||
| 417 | stwu r1,-8(r1) /* Save back chain and move SP */ | |
| 418 | lis r0,RESET_VECTOR@h /* Address of reset vector */ | |
| 61a21e98 | 419 | ori r0,r0,RESET_VECTOR@l |
| 42d1f039 WD |
420 | stwu r1,-8(r1) /* Save back chain and move SP */ |
| 421 | stw r0,+12(r1) /* Save return addr (underflow vect) */ | |
| 422 | ||
| 423 | GET_GOT | |
| 87163180 KG |
424 | bl cpu_init_early_f |
| 425 | ||
| 426 | /* switch back to AS = 0 */ | |
| 427 | lis r3,(MSR_CE|MSR_ME|MSR_DE)@h | |
| 428 | ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l | |
| 429 | mtmsr r3 | |
| 430 | isync | |
| 431 | ||
| 42d1f039 | 432 | bl cpu_init_f |
| 42d1f039 | 433 | bl board_init_f |
| 0ac6f8b7 | 434 | isync |
| 42d1f039 | 435 | |
| 52ebd9c1 PT |
436 | /* NOTREACHED - board_init_f() does not return */ |
| 437 | ||
| 7da53351 | 438 | #ifndef CONFIG_NAND_SPL |
| 61a21e98 | 439 | . = EXC_OFF_SYS_RESET |
| 42d1f039 WD |
440 | .globl _start_of_vectors |
| 441 | _start_of_vectors: | |
| 61a21e98 | 442 | |
| 42d1f039 | 443 | /* Critical input. */ |
| 61a21e98 AF |
444 | CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException) |
| 445 | ||
| 446 | /* Machine check */ | |
| 447 | MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
| 42d1f039 WD |
448 | |
| 449 | /* Data Storage exception. */ | |
| 450 | STD_EXCEPTION(0x0300, DataStorage, UnknownException) | |
| 451 | ||
| 452 | /* Instruction Storage exception. */ | |
| 453 | STD_EXCEPTION(0x0400, InstStorage, UnknownException) | |
| 454 | ||
| 455 | /* External Interrupt exception. */ | |
| 61a21e98 | 456 | STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException) |
| 42d1f039 WD |
457 | |
| 458 | /* Alignment exception. */ | |
| 459 | . = 0x0600 | |
| 460 | Alignment: | |
| 02032e8f | 461 | EXCEPTION_PROLOG(SRR0, SRR1) |
| 42d1f039 WD |
462 | mfspr r4,DAR |
| 463 | stw r4,_DAR(r21) | |
| 464 | mfspr r5,DSISR | |
| 465 | stw r5,_DSISR(r21) | |
| 466 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| fc4e1887 | 467 | EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
| 42d1f039 WD |
468 | |
| 469 | /* Program check exception */ | |
| 470 | . = 0x0700 | |
| 471 | ProgramCheck: | |
| 02032e8f | 472 | EXCEPTION_PROLOG(SRR0, SRR1) |
| 42d1f039 | 473 | addi r3,r1,STACK_FRAME_OVERHEAD |
| fc4e1887 JT |
474 | EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
| 475 | MSR_KERNEL, COPY_EE) | |
| 42d1f039 WD |
476 | |
| 477 | /* No FPU on MPC85xx. This exception is not supposed to happen. | |
| 478 | */ | |
| 479 | STD_EXCEPTION(0x0800, FPUnavailable, UnknownException) | |
| 42d1f039 | 480 | |
| 343117bf | 481 | . = 0x0900 |
| 42d1f039 WD |
482 | /* |
| 483 | * r0 - SYSCALL number | |
| 484 | * r3-... arguments | |
| 485 | */ | |
| 486 | SystemCall: | |
| 61a21e98 AF |
487 | addis r11,r0,0 /* get functions table addr */ |
| 488 | ori r11,r11,0 /* Note: this code is patched in trap_init */ | |
| 489 | addis r12,r0,0 /* get number of functions */ | |
| 343117bf WD |
490 | ori r12,r12,0 |
| 491 | ||
| 61a21e98 | 492 | cmplw 0,r0,r12 |
| 343117bf WD |
493 | bge 1f |
| 494 | ||
| 61a21e98 | 495 | rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */ |
| 343117bf WD |
496 | add r11,r11,r0 |
| 497 | lwz r11,0(r11) | |
| 498 | ||
| 61a21e98 | 499 | li r20,0xd00-4 /* Get stack pointer */ |
| 343117bf | 500 | lwz r12,0(r20) |
| 61a21e98 | 501 | subi r12,r12,12 /* Adjust stack pointer */ |
| 343117bf | 502 | li r0,0xc00+_end_back-SystemCall |
| 61a21e98 | 503 | cmplw 0,r0,r12 /* Check stack overflow */ |
| 343117bf WD |
504 | bgt 1f |
| 505 | stw r12,0(r20) | |
| 506 | ||
| 507 | mflr r0 | |
| 508 | stw r0,0(r12) | |
| 509 | mfspr r0,SRR0 | |
| 510 | stw r0,4(r12) | |
| 511 | mfspr r0,SRR1 | |
| 512 | stw r0,8(r12) | |
| 513 | ||
| 514 | li r12,0xc00+_back-SystemCall | |
| 515 | mtlr r12 | |
| 516 | mtspr SRR0,r11 | |
| 517 | ||
| 518 | 1: SYNC | |
| 42d1f039 WD |
519 | rfi |
| 520 | _back: | |
| 521 | ||
| 343117bf WD |
522 | mfmsr r11 /* Disable interrupts */ |
| 523 | li r12,0 | |
| 524 | ori r12,r12,MSR_EE | |
| 525 | andc r11,r11,r12 | |
| 526 | SYNC /* Some chip revs need this... */ | |
| 527 | mtmsr r11 | |
| 42d1f039 WD |
528 | SYNC |
| 529 | ||
| 343117bf WD |
530 | li r12,0xd00-4 /* restore regs */ |
| 531 | lwz r12,0(r12) | |
| 42d1f039 | 532 | |
| 343117bf WD |
533 | lwz r11,0(r12) |
| 534 | mtlr r11 | |
| 535 | lwz r11,4(r12) | |
| 536 | mtspr SRR0,r11 | |
| 537 | lwz r11,8(r12) | |
| 538 | mtspr SRR1,r11 | |
| 42d1f039 | 539 | |
| 343117bf WD |
540 | addi r12,r12,12 /* Adjust stack pointer */ |
| 541 | li r20,0xd00-4 | |
| 542 | stw r12,0(r20) | |
| 42d1f039 WD |
543 | |
| 544 | SYNC | |
| 545 | rfi | |
| 546 | _end_back: | |
| 547 | ||
| 343117bf WD |
548 | STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt) |
| 549 | STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException) | |
| 550 | STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException) | |
| 42d1f039 | 551 | |
| 343117bf WD |
552 | STD_EXCEPTION(0x0d00, DataTLBError, UnknownException) |
| 553 | STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException) | |
| 42d1f039 | 554 | |
| 343117bf | 555 | CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException ) |
| 42d1f039 | 556 | |
| 343117bf | 557 | .globl _end_of_vectors |
| 42d1f039 WD |
558 | _end_of_vectors: |
| 559 | ||
| 560 | ||
| 61a21e98 | 561 | . = . + (0x100 - ( . & 0xff )) /* align for debug */ |
| 42d1f039 WD |
562 | |
| 563 | /* | |
| 564 | * This code finishes saving the registers to the exception frame | |
| 565 | * and jumps to the appropriate handler for the exception. | |
| 566 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
| 567 | */ | |
| 568 | .globl transfer_to_handler | |
| 569 | transfer_to_handler: | |
| 570 | stw r22,_NIP(r21) | |
| 571 | lis r22,MSR_POW@h | |
| 572 | andc r23,r23,r22 | |
| 573 | stw r23,_MSR(r21) | |
| 574 | SAVE_GPR(7, r21) | |
| 575 | SAVE_4GPRS(8, r21) | |
| 576 | SAVE_8GPRS(12, r21) | |
| 577 | SAVE_8GPRS(24, r21) | |
| 578 | ||
| 579 | mflr r23 | |
| 580 | andi. r24,r23,0x3f00 /* get vector offset */ | |
| 581 | stw r24,TRAP(r21) | |
| 582 | li r22,0 | |
| 583 | stw r22,RESULT(r21) | |
| 584 | mtspr SPRG2,r22 /* r1 is now kernel sp */ | |
| 585 | ||
| 586 | lwz r24,0(r23) /* virtual address of handler */ | |
| 587 | lwz r23,4(r23) /* where to go when done */ | |
| 588 | mtspr SRR0,r24 | |
| 589 | mtspr SRR1,r20 | |
| 590 | mtlr r23 | |
| 591 | SYNC | |
| 592 | rfi /* jump to handler, enable MMU */ | |
| 593 | ||
| 594 | int_return: | |
| 595 | mfmsr r28 /* Disable interrupts */ | |
| 596 | li r4,0 | |
| 597 | ori r4,r4,MSR_EE | |
| 598 | andc r28,r28,r4 | |
| 599 | SYNC /* Some chip revs need this... */ | |
| 600 | mtmsr r28 | |
| 601 | SYNC | |
| 602 | lwz r2,_CTR(r1) | |
| 603 | lwz r0,_LINK(r1) | |
| 604 | mtctr r2 | |
| 605 | mtlr r0 | |
| 606 | lwz r2,_XER(r1) | |
| 607 | lwz r0,_CCR(r1) | |
| 608 | mtspr XER,r2 | |
| 609 | mtcrf 0xFF,r0 | |
| 610 | REST_10GPRS(3, r1) | |
| 611 | REST_10GPRS(13, r1) | |
| 612 | REST_8GPRS(23, r1) | |
| 613 | REST_GPR(31, r1) | |
| 614 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 615 | lwz r0,_MSR(r1) | |
| 616 | mtspr SRR0,r2 | |
| 617 | mtspr SRR1,r0 | |
| 618 | lwz r0,GPR0(r1) | |
| 619 | lwz r2,GPR2(r1) | |
| 620 | lwz r1,GPR1(r1) | |
| 621 | SYNC | |
| 622 | rfi | |
| 623 | ||
| 624 | crit_return: | |
| 625 | mfmsr r28 /* Disable interrupts */ | |
| 626 | li r4,0 | |
| 627 | ori r4,r4,MSR_EE | |
| 628 | andc r28,r28,r4 | |
| 629 | SYNC /* Some chip revs need this... */ | |
| 630 | mtmsr r28 | |
| 631 | SYNC | |
| 632 | lwz r2,_CTR(r1) | |
| 633 | lwz r0,_LINK(r1) | |
| 634 | mtctr r2 | |
| 635 | mtlr r0 | |
| 636 | lwz r2,_XER(r1) | |
| 637 | lwz r0,_CCR(r1) | |
| 638 | mtspr XER,r2 | |
| 639 | mtcrf 0xFF,r0 | |
| 640 | REST_10GPRS(3, r1) | |
| 641 | REST_10GPRS(13, r1) | |
| 642 | REST_8GPRS(23, r1) | |
| 643 | REST_GPR(31, r1) | |
| 644 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 645 | lwz r0,_MSR(r1) | |
| 61a21e98 AF |
646 | mtspr SPRN_CSRR0,r2 |
| 647 | mtspr SPRN_CSRR1,r0 | |
| 42d1f039 WD |
648 | lwz r0,GPR0(r1) |
| 649 | lwz r2,GPR2(r1) | |
| 650 | lwz r1,GPR1(r1) | |
| 651 | SYNC | |
| 652 | rfci | |
| 653 | ||
| 61a21e98 AF |
654 | mck_return: |
| 655 | mfmsr r28 /* Disable interrupts */ | |
| 656 | li r4,0 | |
| 657 | ori r4,r4,MSR_EE | |
| 658 | andc r28,r28,r4 | |
| 659 | SYNC /* Some chip revs need this... */ | |
| 660 | mtmsr r28 | |
| 661 | SYNC | |
| 662 | lwz r2,_CTR(r1) | |
| 663 | lwz r0,_LINK(r1) | |
| 664 | mtctr r2 | |
| 665 | mtlr r0 | |
| 666 | lwz r2,_XER(r1) | |
| 667 | lwz r0,_CCR(r1) | |
| 668 | mtspr XER,r2 | |
| 669 | mtcrf 0xFF,r0 | |
| 670 | REST_10GPRS(3, r1) | |
| 671 | REST_10GPRS(13, r1) | |
| 672 | REST_8GPRS(23, r1) | |
| 673 | REST_GPR(31, r1) | |
| 674 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 675 | lwz r0,_MSR(r1) | |
| 676 | mtspr SPRN_MCSRR0,r2 | |
| 677 | mtspr SPRN_MCSRR1,r0 | |
| 678 | lwz r0,GPR0(r1) | |
| 679 | lwz r2,GPR2(r1) | |
| 680 | lwz r1,GPR1(r1) | |
| 681 | SYNC | |
| 682 | rfmci | |
| 683 | ||
| 42d1f039 WD |
684 | /* Cache functions. |
| 685 | */ | |
| 54e091d3 | 686 | .globl invalidate_icache |
| 42d1f039 WD |
687 | invalidate_icache: |
| 688 | mfspr r0,L1CSR1 | |
| 61a21e98 AF |
689 | ori r0,r0,L1CSR1_ICFI |
| 690 | msync | |
| 691 | isync | |
| 42d1f039 WD |
692 | mtspr L1CSR1,r0 |
| 693 | isync | |
| 61a21e98 | 694 | blr /* entire I cache */ |
| 42d1f039 | 695 | |
| 54e091d3 | 696 | .globl invalidate_dcache |
| 42d1f039 WD |
697 | invalidate_dcache: |
| 698 | mfspr r0,L1CSR0 | |
| 61a21e98 | 699 | ori r0,r0,L1CSR0_DCFI |
| 42d1f039 WD |
700 | msync |
| 701 | isync | |
| 702 | mtspr L1CSR0,r0 | |
| 703 | isync | |
| 704 | blr | |
| 705 | ||
| 706 | .globl icache_enable | |
| 707 | icache_enable: | |
| 708 | mflr r8 | |
| 709 | bl invalidate_icache | |
| 710 | mtlr r8 | |
| 711 | isync | |
| 712 | mfspr r4,L1CSR1 | |
| 713 | ori r4,r4,0x0001 | |
| 714 | oris r4,r4,0x0001 | |
| 715 | mtspr L1CSR1,r4 | |
| 716 | isync | |
| 717 | blr | |
| 718 | ||
| 719 | .globl icache_disable | |
| 720 | icache_disable: | |
| 721 | mfspr r0,L1CSR1 | |
| 61a21e98 AF |
722 | lis r3,0 |
| 723 | ori r3,r3,L1CSR1_ICE | |
| 724 | andc r0,r0,r3 | |
| 42d1f039 WD |
725 | mtspr L1CSR1,r0 |
| 726 | isync | |
| 727 | blr | |
| 728 | ||
| 729 | .globl icache_status | |
| 730 | icache_status: | |
| 731 | mfspr r3,L1CSR1 | |
| 61a21e98 | 732 | andi. r3,r3,L1CSR1_ICE |
| 42d1f039 WD |
733 | blr |
| 734 | ||
| 735 | .globl dcache_enable | |
| 736 | dcache_enable: | |
| 737 | mflr r8 | |
| 738 | bl invalidate_dcache | |
| 739 | mtlr r8 | |
| 740 | isync | |
| 741 | mfspr r0,L1CSR0 | |
| 742 | ori r0,r0,0x0001 | |
| 743 | oris r0,r0,0x0001 | |
| 744 | msync | |
| 745 | isync | |
| 746 | mtspr L1CSR0,r0 | |
| 747 | isync | |
| 748 | blr | |
| 749 | ||
| 750 | .globl dcache_disable | |
| 751 | dcache_disable: | |
| 61a21e98 AF |
752 | mfspr r3,L1CSR0 |
| 753 | lis r4,0 | |
| 754 | ori r4,r4,L1CSR0_DCE | |
| 755 | andc r3,r3,r4 | |
| 42d1f039 WD |
756 | mtspr L1CSR0,r0 |
| 757 | isync | |
| 758 | blr | |
| 759 | ||
| 760 | .globl dcache_status | |
| 761 | dcache_status: | |
| 762 | mfspr r3,L1CSR0 | |
| 61a21e98 | 763 | andi. r3,r3,L1CSR0_DCE |
| 42d1f039 WD |
764 | blr |
| 765 | ||
| 766 | .globl get_pir | |
| 767 | get_pir: | |
| 61a21e98 | 768 | mfspr r3,PIR |
| 42d1f039 WD |
769 | blr |
| 770 | ||
| 771 | .globl get_pvr | |
| 772 | get_pvr: | |
| 61a21e98 | 773 | mfspr r3,PVR |
| 42d1f039 WD |
774 | blr |
| 775 | ||
| 97d80fc3 WD |
776 | .globl get_svr |
| 777 | get_svr: | |
| 61a21e98 | 778 | mfspr r3,SVR |
| 97d80fc3 WD |
779 | blr |
| 780 | ||
| 42d1f039 WD |
781 | .globl wr_tcr |
| 782 | wr_tcr: | |
| 61a21e98 | 783 | mtspr TCR,r3 |
| 42d1f039 WD |
784 | blr |
| 785 | ||
| 786 | /*------------------------------------------------------------------------------- */ | |
| 787 | /* Function: in8 */ | |
| 788 | /* Description: Input 8 bits */ | |
| 789 | /*------------------------------------------------------------------------------- */ | |
| 790 | .globl in8 | |
| 791 | in8: | |
| 792 | lbz r3,0x0000(r3) | |
| 793 | blr | |
| 794 | ||
| 795 | /*------------------------------------------------------------------------------- */ | |
| 796 | /* Function: out8 */ | |
| 797 | /* Description: Output 8 bits */ | |
| 798 | /*------------------------------------------------------------------------------- */ | |
| 799 | .globl out8 | |
| 800 | out8: | |
| 801 | stb r4,0x0000(r3) | |
| 1487adbd | 802 | sync |
| 42d1f039 WD |
803 | blr |
| 804 | ||
| 805 | /*------------------------------------------------------------------------------- */ | |
| 806 | /* Function: out16 */ | |
| 807 | /* Description: Output 16 bits */ | |
| 808 | /*------------------------------------------------------------------------------- */ | |
| 809 | .globl out16 | |
| 810 | out16: | |
| 811 | sth r4,0x0000(r3) | |
| 1487adbd | 812 | sync |
| 42d1f039 WD |
813 | blr |
| 814 | ||
| 815 | /*------------------------------------------------------------------------------- */ | |
| 816 | /* Function: out16r */ | |
| 817 | /* Description: Byte reverse and output 16 bits */ | |
| 818 | /*------------------------------------------------------------------------------- */ | |
| 819 | .globl out16r | |
| 820 | out16r: | |
| 821 | sthbrx r4,r0,r3 | |
| 1487adbd | 822 | sync |
| 42d1f039 WD |
823 | blr |
| 824 | ||
| 825 | /*------------------------------------------------------------------------------- */ | |
| 826 | /* Function: out32 */ | |
| 827 | /* Description: Output 32 bits */ | |
| 828 | /*------------------------------------------------------------------------------- */ | |
| 829 | .globl out32 | |
| 830 | out32: | |
| 831 | stw r4,0x0000(r3) | |
| 1487adbd | 832 | sync |
| 42d1f039 WD |
833 | blr |
| 834 | ||
| 835 | /*------------------------------------------------------------------------------- */ | |
| 836 | /* Function: out32r */ | |
| 837 | /* Description: Byte reverse and output 32 bits */ | |
| 838 | /*------------------------------------------------------------------------------- */ | |
| 839 | .globl out32r | |
| 840 | out32r: | |
| 841 | stwbrx r4,r0,r3 | |
| 1487adbd | 842 | sync |
| 42d1f039 WD |
843 | blr |
| 844 | ||
| 845 | /*------------------------------------------------------------------------------- */ | |
| 846 | /* Function: in16 */ | |
| 847 | /* Description: Input 16 bits */ | |
| 848 | /*------------------------------------------------------------------------------- */ | |
| 849 | .globl in16 | |
| 850 | in16: | |
| 851 | lhz r3,0x0000(r3) | |
| 852 | blr | |
| 853 | ||
| 854 | /*------------------------------------------------------------------------------- */ | |
| 855 | /* Function: in16r */ | |
| 856 | /* Description: Input 16 bits and byte reverse */ | |
| 857 | /*------------------------------------------------------------------------------- */ | |
| 858 | .globl in16r | |
| 859 | in16r: | |
| 860 | lhbrx r3,r0,r3 | |
| 861 | blr | |
| 862 | ||
| 863 | /*------------------------------------------------------------------------------- */ | |
| 864 | /* Function: in32 */ | |
| 865 | /* Description: Input 32 bits */ | |
| 866 | /*------------------------------------------------------------------------------- */ | |
| 867 | .globl in32 | |
| 868 | in32: | |
| 869 | lwz 3,0x0000(3) | |
| 870 | blr | |
| 871 | ||
| 872 | /*------------------------------------------------------------------------------- */ | |
| 873 | /* Function: in32r */ | |
| 874 | /* Description: Input 32 bits and byte reverse */ | |
| 875 | /*------------------------------------------------------------------------------- */ | |
| 876 | .globl in32r | |
| 877 | in32r: | |
| 878 | lwbrx r3,r0,r3 | |
| 879 | blr | |
| 7da53351 | 880 | #endif /* !CONFIG_NAND_SPL */ |
| 42d1f039 | 881 | |
| 42d1f039 WD |
882 | /*------------------------------------------------------------------------------*/ |
| 883 | ||
| d30f9043 KG |
884 | /* |
| 885 | * void write_tlb(mas0, mas1, mas2, mas3, mas7) | |
| 886 | */ | |
| 887 | .globl write_tlb | |
| 888 | write_tlb: | |
| 889 | mtspr MAS0,r3 | |
| 890 | mtspr MAS1,r4 | |
| 891 | mtspr MAS2,r5 | |
| 892 | mtspr MAS3,r6 | |
| 893 | #ifdef CONFIG_ENABLE_36BIT_PHYS | |
| 894 | mtspr MAS7,r7 | |
| 895 | #endif | |
| 896 | li r3,0 | |
| 897 | #ifdef CONFIG_SYS_BOOK3E_HV | |
| 898 | mtspr MAS8,r3 | |
| 899 | #endif | |
| 900 | isync | |
| 901 | tlbwe | |
| 902 | msync | |
| 903 | isync | |
| 904 | blr | |
| 905 | ||
| 42d1f039 WD |
906 | /* |
| 907 | * void relocate_code (addr_sp, gd, addr_moni) | |
| 908 | * | |
| 909 | * This "function" does not return, instead it continues in RAM | |
| 910 | * after relocating the monitor code. | |
| 911 | * | |
| 912 | * r3 = dest | |
| 913 | * r4 = src | |
| 914 | * r5 = length in bytes | |
| 915 | * r6 = cachelinesize | |
| 916 | */ | |
| 917 | .globl relocate_code | |
| 918 | relocate_code: | |
| 61a21e98 AF |
919 | mr r1,r3 /* Set new stack pointer */ |
| 920 | mr r9,r4 /* Save copy of Init Data pointer */ | |
| 921 | mr r10,r5 /* Save copy of Destination Address */ | |
| 42d1f039 | 922 | |
| 0f8aa159 | 923 | GET_GOT |
| 61a21e98 | 924 | mr r3,r5 /* Destination Address */ |
| 6d0f6bcf JCPV |
925 | lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
| 926 | ori r4,r4,CONFIG_SYS_MONITOR_BASE@l | |
| 42d1f039 WD |
927 | lwz r5,GOT(__init_end) |
| 928 | sub r5,r5,r4 | |
| 6d0f6bcf | 929 | li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */ |
| 42d1f039 WD |
930 | |
| 931 | /* | |
| 932 | * Fix GOT pointer: | |
| 933 | * | |
| 6d0f6bcf | 934 | * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address |
| 42d1f039 WD |
935 | * |
| 936 | * Offset: | |
| 937 | */ | |
| 61a21e98 | 938 | sub r15,r10,r4 |
| 42d1f039 WD |
939 | |
| 940 | /* First our own GOT */ | |
| 0f8aa159 | 941 | add r12,r12,r15 |
| 42d1f039 | 942 | /* the the one used by the C code */ |
| 61a21e98 | 943 | add r30,r30,r15 |
| 42d1f039 WD |
944 | |
| 945 | /* | |
| 946 | * Now relocate code | |
| 947 | */ | |
| 948 | ||
| 949 | cmplw cr1,r3,r4 | |
| 950 | addi r0,r5,3 | |
| 951 | srwi. r0,r0,2 | |
| 952 | beq cr1,4f /* In place copy is not necessary */ | |
| 953 | beq 7f /* Protect against 0 count */ | |
| 954 | mtctr r0 | |
| 955 | bge cr1,2f | |
| 956 | ||
| 957 | la r8,-4(r4) | |
| 958 | la r7,-4(r3) | |
| 959 | 1: lwzu r0,4(r8) | |
| 960 | stwu r0,4(r7) | |
| 961 | bdnz 1b | |
| 962 | b 4f | |
| 963 | ||
| 964 | 2: slwi r0,r0,2 | |
| 965 | add r8,r4,r0 | |
| 966 | add r7,r3,r0 | |
| 967 | 3: lwzu r0,-4(r8) | |
| 968 | stwu r0,-4(r7) | |
| 969 | bdnz 3b | |
| 970 | ||
| 971 | /* | |
| 972 | * Now flush the cache: note that we must start from a cache aligned | |
| 973 | * address. Otherwise we might miss one cache line. | |
| 974 | */ | |
| 975 | 4: cmpwi r6,0 | |
| 976 | add r5,r3,r5 | |
| 977 | beq 7f /* Always flush prefetch queue in any case */ | |
| 978 | subi r0,r6,1 | |
| 979 | andc r3,r3,r0 | |
| 980 | mr r4,r3 | |
| 981 | 5: dcbst 0,r4 | |
| 982 | add r4,r4,r6 | |
| 983 | cmplw r4,r5 | |
| 984 | blt 5b | |
| 985 | sync /* Wait for all dcbst to complete on bus */ | |
| 986 | mr r4,r3 | |
| 987 | 6: icbi 0,r4 | |
| 988 | add r4,r4,r6 | |
| 989 | cmplw r4,r5 | |
| 990 | blt 6b | |
| 991 | 7: sync /* Wait for all icbi to complete on bus */ | |
| 992 | isync | |
| 993 | ||
| 7d314992 WD |
994 | /* |
| 995 | * Re-point the IVPR at RAM | |
| 996 | */ | |
| 997 | mtspr IVPR,r10 | |
| 99b0d285 | 998 | |
| 42d1f039 WD |
999 | /* |
| 1000 | * We are done. Do not return, instead branch to second part of board | |
| 1001 | * initialization, now running from RAM. | |
| 1002 | */ | |
| 1003 | ||
| 61a21e98 | 1004 | addi r0,r10,in_ram - _start + _START_OFFSET |
| 42d1f039 WD |
1005 | mtlr r0 |
| 1006 | blr /* NEVER RETURNS! */ | |
| 61a21e98 | 1007 | .globl in_ram |
| 42d1f039 WD |
1008 | in_ram: |
| 1009 | ||
| 1010 | /* | |
| 0f8aa159 | 1011 | * Relocation Function, r12 point to got2+0x8000 |
| 42d1f039 WD |
1012 | * |
| 1013 | * Adjust got2 pointers, no need to check for 0, this code | |
| 1014 | * already puts a few entries in the table. | |
| 1015 | */ | |
| 1016 | li r0,__got2_entries@sectoff@l | |
| 1017 | la r3,GOT(_GOT2_TABLE_) | |
| 1018 | lwz r11,GOT(_GOT2_TABLE_) | |
| 1019 | mtctr r0 | |
| 1020 | sub r11,r3,r11 | |
| 1021 | addi r3,r3,-4 | |
| 1022 | 1: lwzu r0,4(r3) | |
| afc3ba0f JT |
1023 | cmpwi r0,0 |
| 1024 | beq- 2f | |
| 42d1f039 WD |
1025 | add r0,r0,r11 |
| 1026 | stw r0,0(r3) | |
| afc3ba0f | 1027 | 2: bdnz 1b |
| 42d1f039 WD |
1028 | |
| 1029 | /* | |
| 1030 | * Now adjust the fixups and the pointers to the fixups | |
| 1031 | * in case we need to move ourselves again. | |
| 1032 | */ | |
| afc3ba0f | 1033 | li r0,__fixup_entries@sectoff@l |
| 42d1f039 WD |
1034 | lwz r3,GOT(_FIXUP_TABLE_) |
| 1035 | cmpwi r0,0 | |
| 1036 | mtctr r0 | |
| 1037 | addi r3,r3,-4 | |
| 1038 | beq 4f | |
| 1039 | 3: lwzu r4,4(r3) | |
| 1040 | lwzux r0,r4,r11 | |
| d1e0b10a | 1041 | cmpwi r0,0 |
| 42d1f039 | 1042 | add r0,r0,r11 |
| 34bbf618 | 1043 | stw r4,0(r3) |
| d1e0b10a | 1044 | beq- 5f |
| 42d1f039 | 1045 | stw r0,0(r4) |
| d1e0b10a | 1046 | 5: bdnz 3b |
| 42d1f039 WD |
1047 | 4: |
| 1048 | clear_bss: | |
| 1049 | /* | |
| 1050 | * Now clear BSS segment | |
| 1051 | */ | |
| 1052 | lwz r3,GOT(__bss_start) | |
| 1053 | lwz r4,GOT(_end) | |
| 1054 | ||
| 61a21e98 | 1055 | cmplw 0,r3,r4 |
| 42d1f039 WD |
1056 | beq 6f |
| 1057 | ||
| 61a21e98 | 1058 | li r0,0 |
| 42d1f039 | 1059 | 5: |
| 61a21e98 AF |
1060 | stw r0,0(r3) |
| 1061 | addi r3,r3,4 | |
| 1062 | cmplw 0,r3,r4 | |
| 42d1f039 WD |
1063 | bne 5b |
| 1064 | 6: | |
| 1065 | ||
| 61a21e98 AF |
1066 | mr r3,r9 /* Init Data pointer */ |
| 1067 | mr r4,r10 /* Destination Address */ | |
| 42d1f039 WD |
1068 | bl board_init_r |
| 1069 | ||
| 7da53351 | 1070 | #ifndef CONFIG_NAND_SPL |
| 42d1f039 WD |
1071 | /* |
| 1072 | * Copy exception vector code to low memory | |
| 1073 | * | |
| 1074 | * r3: dest_addr | |
| 1075 | * r7: source address, r8: end address, r9: target address | |
| 1076 | */ | |
| 343117bf | 1077 | .globl trap_init |
| 42d1f039 | 1078 | trap_init: |
| 0f8aa159 JT |
1079 | mflr r4 /* save link register */ |
| 1080 | GET_GOT | |
| 61a21e98 AF |
1081 | lwz r7,GOT(_start_of_vectors) |
| 1082 | lwz r8,GOT(_end_of_vectors) | |
| 42d1f039 | 1083 | |
| 61a21e98 | 1084 | li r9,0x100 /* reset vector always at 0x100 */ |
| 42d1f039 | 1085 | |
| 61a21e98 | 1086 | cmplw 0,r7,r8 |
| 343117bf | 1087 | bgelr /* return if r7>=r8 - just in case */ |
| 42d1f039 | 1088 | 1: |
| 61a21e98 AF |
1089 | lwz r0,0(r7) |
| 1090 | stw r0,0(r9) | |
| 1091 | addi r7,r7,4 | |
| 1092 | addi r9,r9,4 | |
| 1093 | cmplw 0,r7,r8 | |
| 343117bf | 1094 | bne 1b |
| 42d1f039 WD |
1095 | |
| 1096 | /* | |
| 1097 | * relocate `hdlr' and `int_return' entries | |
| 1098 | */ | |
| 61a21e98 | 1099 | li r7,.L_CriticalInput - _start + _START_OFFSET |
| 343117bf | 1100 | bl trap_reloc |
| 61a21e98 | 1101 | li r7,.L_MachineCheck - _start + _START_OFFSET |
| 343117bf | 1102 | bl trap_reloc |
| 61a21e98 | 1103 | li r7,.L_DataStorage - _start + _START_OFFSET |
| 343117bf | 1104 | bl trap_reloc |
| 61a21e98 | 1105 | li r7,.L_InstStorage - _start + _START_OFFSET |
| 343117bf | 1106 | bl trap_reloc |
| 61a21e98 | 1107 | li r7,.L_ExtInterrupt - _start + _START_OFFSET |
| 343117bf | 1108 | bl trap_reloc |
| 61a21e98 | 1109 | li r7,.L_Alignment - _start + _START_OFFSET |
| 343117bf | 1110 | bl trap_reloc |
| 61a21e98 | 1111 | li r7,.L_ProgramCheck - _start + _START_OFFSET |
| 343117bf | 1112 | bl trap_reloc |
| 61a21e98 | 1113 | li r7,.L_FPUnavailable - _start + _START_OFFSET |
| 343117bf | 1114 | bl trap_reloc |
| 61a21e98 AF |
1115 | li r7,.L_Decrementer - _start + _START_OFFSET |
| 1116 | bl trap_reloc | |
| 1117 | li r7,.L_IntervalTimer - _start + _START_OFFSET | |
| 1118 | li r8,_end_of_vectors - _start + _START_OFFSET | |
| 42d1f039 | 1119 | 2: |
| 343117bf | 1120 | bl trap_reloc |
| 61a21e98 AF |
1121 | addi r7,r7,0x100 /* next exception vector */ |
| 1122 | cmplw 0,r7,r8 | |
| 343117bf WD |
1123 | blt 2b |
| 1124 | ||
| 1125 | lis r7,0x0 | |
| 61a21e98 | 1126 | mtspr IVPR,r7 |
| 42d1f039 | 1127 | |
| 343117bf | 1128 | mtlr r4 /* restore link register */ |
| 42d1f039 WD |
1129 | blr |
| 1130 | ||
| 42d1f039 WD |
1131 | .globl unlock_ram_in_cache |
| 1132 | unlock_ram_in_cache: | |
| 1133 | /* invalidate the INIT_RAM section */ | |
| a38a5b6e KG |
1134 | lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h |
| 1135 | ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l | |
| b009f3ec KG |
1136 | mfspr r4,L1CFG0 |
| 1137 | andi. r4,r4,0x1ff | |
| 1138 | slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT) | |
| 61a21e98 | 1139 | mtctr r4 |
| 2b22fa4b | 1140 | 1: dcbi r0,r3 |
| 6d0f6bcf | 1141 | addi r3,r3,CONFIG_SYS_CACHELINE_SIZE |
| 42d1f039 | 1142 | bdnz 1b |
| 2b22fa4b | 1143 | sync |
| 21fae8b2 AF |
1144 | |
| 1145 | /* Invalidate the TLB entries for the cache */ | |
| 6d0f6bcf JCPV |
1146 | lis r3,CONFIG_SYS_INIT_RAM_ADDR@h |
| 1147 | ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l | |
| 21fae8b2 AF |
1148 | tlbivax 0,r3 |
| 1149 | addi r3,r3,0x1000 | |
| 1150 | tlbivax 0,r3 | |
| 1151 | addi r3,r3,0x1000 | |
| 1152 | tlbivax 0,r3 | |
| 1153 | addi r3,r3,0x1000 | |
| 1154 | tlbivax 0,r3 | |
| 42d1f039 WD |
1155 | isync |
| 1156 | blr | |
| 54e091d3 KG |
1157 | |
| 1158 | .globl flush_dcache | |
| 1159 | flush_dcache: | |
| 1160 | mfspr r3,SPRN_L1CFG0 | |
| 1161 | ||
| 1162 | rlwinm r5,r3,9,3 /* Extract cache block size */ | |
| 1163 | twlgti r5,1 /* Only 32 and 64 byte cache blocks | |
| 1164 | * are currently defined. | |
| 1165 | */ | |
| 1166 | li r4,32 | |
| 1167 | subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) - | |
| 1168 | * log2(number of ways) | |
| 1169 | */ | |
| 1170 | slw r5,r4,r5 /* r5 = cache block size */ | |
| 1171 | ||
| 1172 | rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */ | |
| 1173 | mulli r7,r7,13 /* An 8-way cache will require 13 | |
| 1174 | * loads per set. | |
| 1175 | */ | |
| 1176 | slw r7,r7,r6 | |
| 1177 | ||
| 1178 | /* save off HID0 and set DCFA */ | |
| 1179 | mfspr r8,SPRN_HID0 | |
| 1180 | ori r9,r8,HID0_DCFA@l | |
| 1181 | mtspr SPRN_HID0,r9 | |
| 1182 | isync | |
| 1183 | ||
| 1184 | lis r4,0 | |
| 1185 | mtctr r7 | |
| 1186 | ||
| 1187 | 1: lwz r3,0(r4) /* Load... */ | |
| 1188 | add r4,r4,r5 | |
| 1189 | bdnz 1b | |
| 1190 | ||
| 1191 | msync | |
| 1192 | lis r4,0 | |
| 1193 | mtctr r7 | |
| 1194 | ||
| 1195 | 1: dcbf 0,r4 /* ...and flush. */ | |
| 1196 | add r4,r4,r5 | |
| 1197 | bdnz 1b | |
| 1198 | ||
| 1199 | /* restore HID0 */ | |
| 1200 | mtspr SPRN_HID0,r8 | |
| 1201 | isync | |
| 1202 | ||
| 1203 | blr | |
| 26f4cdba KG |
1204 | |
| 1205 | .globl setup_ivors | |
| 1206 | setup_ivors: | |
| 1207 | ||
| 1208 | #include "fixed_ivor.S" | |
| 1209 | blr | |
| 7da53351 | 1210 | #endif /* !CONFIG_NAND_SPL */ |