wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 1 | /* |
| 2 | * armboot - Startup Code for OMP2420/ARM1136 CPU-core |
| 3 | * |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 4 | * Copyright (c) 2004 Texas Instruments <r-woodruff2@ti.com> |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 5 | * |
| 6 | * Copyright (c) 2001 Marius Gröger <mag@sysgo.de> |
| 7 | * Copyright (c) 2002 Alex Züpke <azu@sysgo.de> |
Detlev Zundel | 792a09e | 2009-05-13 10:54:10 +0200 | [diff] [blame] | 8 | * Copyright (c) 2002 Gary Jennejohn <garyj@denx.de> |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 9 | * Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com> |
| 10 | * Copyright (c) 2003 Kshitij <kshitij@ti.com> |
| 11 | * |
| 12 | * See file CREDITS for list of people who contributed to this |
| 13 | * project. |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License as |
| 17 | * published by the Free Software Foundation; either version 2 of |
| 18 | * the License, or (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 28 | * MA 02111-1307 USA |
| 29 | */ |
| 30 | |
Wolfgang Denk | 25ddd1f | 2010-10-26 14:34:52 +0200 | [diff] [blame] | 31 | #include <asm-offsets.h> |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 32 | #include <config.h> |
| 33 | #include <version.h> |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 34 | .globl _start |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 35 | _start: b reset |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 36 | #ifdef CONFIG_PRELOADER |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 37 | ldr pc, _hang |
| 38 | ldr pc, _hang |
| 39 | ldr pc, _hang |
| 40 | ldr pc, _hang |
| 41 | ldr pc, _hang |
| 42 | ldr pc, _hang |
| 43 | ldr pc, _hang |
| 44 | |
| 45 | _hang: |
| 46 | .word do_hang |
| 47 | .word 0x12345678 |
| 48 | .word 0x12345678 |
| 49 | .word 0x12345678 |
| 50 | .word 0x12345678 |
| 51 | .word 0x12345678 |
| 52 | .word 0x12345678 |
| 53 | .word 0x12345678 /* now 16*4=64 */ |
| 54 | #else |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 55 | ldr pc, _undefined_instruction |
| 56 | ldr pc, _software_interrupt |
| 57 | ldr pc, _prefetch_abort |
| 58 | ldr pc, _data_abort |
| 59 | ldr pc, _not_used |
| 60 | ldr pc, _irq |
| 61 | ldr pc, _fiq |
| 62 | |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 63 | _undefined_instruction: .word undefined_instruction |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 64 | _software_interrupt: .word software_interrupt |
| 65 | _prefetch_abort: .word prefetch_abort |
| 66 | _data_abort: .word data_abort |
| 67 | _not_used: .word not_used |
| 68 | _irq: .word irq |
| 69 | _fiq: .word fiq |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 70 | _pad: .word 0x12345678 /* now 16*4=64 */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 71 | #endif /* CONFIG_PRELOADER */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 72 | .global _end_vect |
| 73 | _end_vect: |
| 74 | |
| 75 | .balignl 16,0xdeadbeef |
| 76 | /* |
| 77 | ************************************************************************* |
| 78 | * |
| 79 | * Startup Code (reset vector) |
| 80 | * |
| 81 | * do important init only if we don't start from memory! |
| 82 | * setup Memory and board specific bits prior to relocation. |
| 83 | * relocate armboot to ram |
| 84 | * setup stack |
| 85 | * |
| 86 | ************************************************************************* |
| 87 | */ |
| 88 | |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 89 | .globl _TEXT_BASE |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 90 | _TEXT_BASE: |
Wolfgang Denk | 14d0a02 | 2010-10-07 21:51:12 +0200 | [diff] [blame] | 91 | .word CONFIG_SYS_TEXT_BASE |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 92 | |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 93 | /* |
| 94 | * These are defined in the board-specific linker script. |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 95 | * Subtracting _start from them lets the linker put their |
| 96 | * relative position in the executable instead of leaving |
| 97 | * them null. |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 98 | */ |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 99 | .globl _bss_start_ofs |
| 100 | _bss_start_ofs: |
| 101 | .word __bss_start - _start |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 102 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 103 | .globl _bss_end_ofs |
| 104 | _bss_end_ofs: |
| 105 | .word _end - _start |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 106 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 107 | .globl _datarel_start_ofs |
| 108 | _datarel_start_ofs: |
| 109 | .word __datarel_start - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 110 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 111 | .globl _datarelrolocal_start_ofs |
| 112 | _datarelrolocal_start_ofs: |
| 113 | .word __datarelrolocal_start - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 114 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 115 | .globl _datarellocal_start_ofs |
| 116 | _datarellocal_start_ofs: |
| 117 | .word __datarellocal_start - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 118 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 119 | .globl _datarelro_start_ofs |
| 120 | _datarelro_start_ofs: |
| 121 | .word __datarelro_start - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 122 | |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 123 | #ifdef CONFIG_USE_IRQ |
| 124 | /* IRQ stack memory (calculated at run-time) */ |
| 125 | .globl IRQ_STACK_START |
| 126 | IRQ_STACK_START: |
| 127 | .word 0x0badc0de |
| 128 | |
| 129 | /* IRQ stack memory (calculated at run-time) */ |
| 130 | .globl FIQ_STACK_START |
| 131 | FIQ_STACK_START: |
| 132 | .word 0x0badc0de |
| 133 | #endif |
| 134 | |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 135 | #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
| 136 | /* IRQ stack memory (calculated at run-time) + 8 bytes */ |
| 137 | .globl IRQ_STACK_START_IN |
| 138 | IRQ_STACK_START_IN: |
| 139 | .word 0x0badc0de |
| 140 | #endif |
| 141 | |
| 142 | #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
| 143 | /* |
| 144 | * the actual reset code |
| 145 | */ |
| 146 | |
| 147 | reset: |
| 148 | /* |
| 149 | * set the cpu to SVC32 mode |
| 150 | */ |
| 151 | mrs r0,cpsr |
| 152 | bic r0,r0,#0x1f |
| 153 | orr r0,r0,#0xd3 |
| 154 | msr cpsr,r0 |
| 155 | |
| 156 | #ifdef CONFIG_OMAP2420H4 |
| 157 | /* Copy vectors to mask ROM indirect addr */ |
| 158 | adr r0, _start /* r0 <- current position of code */ |
| 159 | add r0, r0, #4 /* skip reset vector */ |
| 160 | mov r2, #64 /* r2 <- size to copy */ |
| 161 | add r2, r0, r2 /* r2 <- source end address */ |
| 162 | mov r1, #SRAM_OFFSET0 /* build vect addr */ |
| 163 | mov r3, #SRAM_OFFSET1 |
| 164 | add r1, r1, r3 |
| 165 | mov r3, #SRAM_OFFSET2 |
| 166 | add r1, r1, r3 |
| 167 | next: |
| 168 | ldmia r0!, {r3-r10} /* copy from source address [r0] */ |
| 169 | stmia r1!, {r3-r10} /* copy to target address [r1] */ |
| 170 | cmp r0, r2 /* until source end address [r2] */ |
| 171 | bne next /* loop until equal */ |
| 172 | bl cpy_clk_code /* put dpll adjust code behind vectors */ |
| 173 | #endif |
| 174 | /* the mask ROM code should have PLL and others stable */ |
| 175 | #ifndef CONFIG_SKIP_LOWLEVEL_INIT |
| 176 | bl cpu_init_crit |
| 177 | #endif |
| 178 | |
| 179 | /* Set stackpointer in internal RAM to call board_init_f */ |
| 180 | call_board_init_f: |
| 181 | ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) |
| 182 | ldr r0,=0x00000000 |
| 183 | |
| 184 | #ifdef CONFIG_NAND_SPL |
| 185 | bl nand_boot |
| 186 | #else |
| 187 | #ifdef CONFIG_ONENAND_IPL |
| 188 | bl start_oneboot |
| 189 | #else |
| 190 | bl board_init_f |
| 191 | #endif /* CONFIG_ONENAND_IPL */ |
| 192 | #endif /* CONFIG_NAND_SPL */ |
| 193 | |
| 194 | /*------------------------------------------------------------------------------*/ |
| 195 | |
| 196 | /* |
| 197 | * void relocate_code (addr_sp, gd, addr_moni) |
| 198 | * |
| 199 | * This "function" does not return, instead it continues in RAM |
| 200 | * after relocating the monitor code. |
| 201 | * |
| 202 | */ |
| 203 | .globl relocate_code |
| 204 | relocate_code: |
| 205 | mov r4, r0 /* save addr_sp */ |
| 206 | mov r5, r1 /* save addr of gd */ |
| 207 | mov r6, r2 /* save addr of destination */ |
| 208 | mov r7, r2 /* save addr of destination */ |
| 209 | |
| 210 | /* Set up the stack */ |
| 211 | stack_setup: |
| 212 | mov sp, r4 |
| 213 | |
| 214 | adr r0, _start |
| 215 | ldr r2, _TEXT_BASE |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 216 | ldr r3, _bss_start_ofs |
| 217 | add r2, r0, r3 /* r2 <- source end address */ |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 218 | cmp r0, r6 |
| 219 | beq clear_bss |
| 220 | |
| 221 | #ifndef CONFIG_SKIP_RELOCATE_UBOOT |
| 222 | copy_loop: |
| 223 | ldmia r0!, {r9-r10} /* copy from source address [r0] */ |
| 224 | stmia r6!, {r9-r10} /* copy to target address [r1] */ |
Albert Aribaud | da90d4c | 2010-10-05 16:06:39 +0200 | [diff] [blame] | 225 | cmp r0, r2 /* until source end address [r2] */ |
| 226 | blo copy_loop |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 227 | |
| 228 | #ifndef CONFIG_PRELOADER |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 229 | /* |
| 230 | * fix .rel.dyn relocations |
| 231 | */ |
| 232 | ldr r0, _TEXT_BASE /* r0 <- Text base */ |
| 233 | sub r9, r7, r0 /* r9 <- relocation offset */ |
| 234 | ldr r10, _dynsym_start_ofs /* r10 <- sym table ofs */ |
| 235 | add r10, r10, r0 /* r10 <- sym table in FLASH */ |
| 236 | ldr r2, _rel_dyn_start_ofs /* r2 <- rel dyn start ofs */ |
| 237 | add r2, r2, r0 /* r2 <- rel dyn start in FLASH */ |
| 238 | ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */ |
| 239 | add r3, r3, r0 /* r3 <- rel dyn end in FLASH */ |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 240 | fixloop: |
Gray Remlin | 8c0c2b9 | 2010-10-24 16:18:31 +0100 | [diff] [blame] | 241 | ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */ |
| 242 | add r0, r0, r9 /* r0 <- location to fix up in RAM */ |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 243 | ldr r1, [r2, #4] |
| 244 | and r8, r1, #0xff |
Gray Remlin | 8c0c2b9 | 2010-10-24 16:18:31 +0100 | [diff] [blame] | 245 | cmp r8, #23 /* relative fixup? */ |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 246 | beq fixrel |
Gray Remlin | 8c0c2b9 | 2010-10-24 16:18:31 +0100 | [diff] [blame] | 247 | cmp r8, #2 /* absolute fixup? */ |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 248 | beq fixabs |
| 249 | /* ignore unknown type of fixup */ |
| 250 | b fixnext |
| 251 | fixabs: |
| 252 | /* absolute fix: set location to (offset) symbol value */ |
| 253 | mov r1, r1, LSR #4 /* r1 <- symbol index in .dynsym */ |
| 254 | add r1, r10, r1 /* r1 <- address of symbol in table */ |
| 255 | ldr r1, [r1, #4] /* r1 <- symbol value */ |
| 256 | add r1, r9 /* r1 <- relocated sym addr */ |
| 257 | b fixnext |
| 258 | fixrel: |
| 259 | /* relative fix: increase location by offset */ |
| 260 | ldr r1, [r0] |
| 261 | add r1, r1, r9 |
| 262 | fixnext: |
| 263 | str r1, [r0] |
Gray Remlin | 8c0c2b9 | 2010-10-24 16:18:31 +0100 | [diff] [blame] | 264 | add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 265 | cmp r2, r3 |
Wolfgang Denk | 79e6313 | 2010-10-23 23:22:38 +0200 | [diff] [blame^] | 266 | blo fixloop |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 267 | #endif |
| 268 | #endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */ |
| 269 | |
| 270 | clear_bss: |
| 271 | #ifndef CONFIG_PRELOADER |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 272 | ldr r0, _bss_start_ofs |
| 273 | ldr r1, _bss_end_ofs |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 274 | ldr r3, _TEXT_BASE /* Text base */ |
| 275 | mov r4, r7 /* reloc addr */ |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 276 | add r0, r0, r4 |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 277 | add r1, r1, r4 |
| 278 | mov r2, #0x00000000 /* clear */ |
| 279 | |
| 280 | clbss_l:str r2, [r0] /* clear loop... */ |
| 281 | add r0, r0, #4 |
| 282 | cmp r0, r1 |
| 283 | bne clbss_l |
| 284 | #endif /* #ifndef CONFIG_PRELOADER */ |
| 285 | |
| 286 | /* |
| 287 | * We are done. Do not return, instead branch to second part of board |
| 288 | * initialization, now running from RAM. |
| 289 | */ |
| 290 | #ifdef CONFIG_NAND_SPL |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 291 | ldr r0, _nand_boot_ofs |
| 292 | adr r1, _start |
| 293 | add pc, r0, r1 |
| 294 | _nand_boot_ofs |
| 295 | : .word nand_boot - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 296 | #else |
| 297 | jump_2_ram: |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 298 | ldr r0, _board_init_r_ofs |
| 299 | adr r1, _start |
Darius Augulis | 123fb7d | 2010-10-25 13:45:35 +0300 | [diff] [blame] | 300 | add lr, r0, r1 |
| 301 | #ifndef CONFIG_SKIP_RELOCATE_UBOOT |
| 302 | add lr, lr, r9 |
| 303 | #endif |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 304 | /* setup parameters for board_init_r */ |
| 305 | mov r0, r5 /* gd_t */ |
| 306 | mov r1, r7 /* dest_addr */ |
| 307 | /* jump to it ... */ |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 308 | mov pc, lr |
| 309 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 310 | _board_init_r_ofs: |
| 311 | .word board_init_r - _start |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 312 | #endif |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 313 | |
| 314 | _rel_dyn_start_ofs: |
| 315 | .word __rel_dyn_start - _start |
| 316 | _rel_dyn_end_ofs: |
| 317 | .word __rel_dyn_end - _start |
| 318 | _dynsym_start_ofs: |
| 319 | .word __dynsym_start - _start |
| 320 | |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 321 | #else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 322 | /* |
| 323 | * the actual reset code |
| 324 | */ |
| 325 | |
| 326 | reset: |
| 327 | /* |
| 328 | * set the cpu to SVC32 mode |
| 329 | */ |
| 330 | mrs r0,cpsr |
| 331 | bic r0,r0,#0x1f |
| 332 | orr r0,r0,#0xd3 |
| 333 | msr cpsr,r0 |
| 334 | |
| 335 | #ifdef CONFIG_OMAP2420H4 |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 336 | /* Copy vectors to mask ROM indirect addr */ |
| 337 | adr r0, _start /* r0 <- current position of code */ |
Wolfgang Denk | 53677ef | 2008-05-20 16:00:29 +0200 | [diff] [blame] | 338 | add r0, r0, #4 /* skip reset vector */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 339 | mov r2, #64 /* r2 <- size to copy */ |
| 340 | add r2, r0, r2 /* r2 <- source end address */ |
| 341 | mov r1, #SRAM_OFFSET0 /* build vect addr */ |
| 342 | mov r3, #SRAM_OFFSET1 |
| 343 | add r1, r1, r3 |
| 344 | mov r3, #SRAM_OFFSET2 |
| 345 | add r1, r1, r3 |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 346 | next: |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 347 | ldmia r0!, {r3-r10} /* copy from source address [r0] */ |
| 348 | stmia r1!, {r3-r10} /* copy to target address [r1] */ |
| 349 | cmp r0, r2 /* until source end address [r2] */ |
| 350 | bne next /* loop until equal */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 351 | bl cpy_clk_code /* put dpll adjust code behind vectors */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 352 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 353 | /* the mask ROM code should have PLL and others stable */ |
wdenk | 8aa1a2d | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 354 | #ifndef CONFIG_SKIP_LOWLEVEL_INIT |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 355 | bl cpu_init_crit |
wdenk | 8aa1a2d | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 356 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 357 | |
wdenk | 8aa1a2d | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 358 | #ifndef CONFIG_SKIP_RELOCATE_UBOOT |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 359 | relocate: /* relocate U-Boot to RAM */ |
| 360 | adr r0, _start /* r0 <- current position of code */ |
| 361 | ldr r1, _TEXT_BASE /* test if we run from flash or RAM */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 362 | cmp r0, r1 /* don't reloc during debug */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 363 | #ifndef CONFIG_PRELOADER |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 364 | beq stack_setup |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 365 | #endif /* CONFIG_PRELOADER */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 366 | |
| 367 | ldr r2, _armboot_start |
| 368 | ldr r3, _bss_start |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 369 | sub r2, r3, r2 /* r2 <- size of armboot */ |
| 370 | add r2, r0, r2 /* r2 <- source end address */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 371 | |
| 372 | copy_loop: |
| 373 | ldmia r0!, {r3-r10} /* copy from source address [r0] */ |
| 374 | stmia r1!, {r3-r10} /* copy to target address [r1] */ |
Albert Aribaud | da90d4c | 2010-10-05 16:06:39 +0200 | [diff] [blame] | 375 | cmp r0, r2 /* until source end address [r2] */ |
| 376 | blo copy_loop |
wdenk | 8aa1a2d | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 377 | #endif /* CONFIG_SKIP_RELOCATE_UBOOT */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 378 | |
| 379 | /* Set up the stack */ |
| 380 | stack_setup: |
| 381 | ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 382 | #ifdef CONFIG_PRELOADER |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 383 | sub sp, r0, #128 /* leave 32 words for abort-stack */ |
| 384 | #else |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 385 | sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */ |
Wolfgang Denk | 25ddd1f | 2010-10-26 14:34:52 +0200 | [diff] [blame] | 386 | sub r0, r0, #GENERATED_GBL_DATA_SIZE /* bdinfo */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 387 | #ifdef CONFIG_USE_IRQ |
| 388 | sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ) |
| 389 | #endif |
| 390 | sub sp, r0, #12 /* leave 3 words for abort-stack */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 391 | #endif /* CONFIG_PRELOADER */ |
Vitaly Kuzmichev | 1a27f7d | 2010-06-15 22:18:11 +0400 | [diff] [blame] | 392 | bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 393 | |
| 394 | clear_bss: |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 395 | adr r2, _start |
| 396 | ldr r0, _bss_start_ofs /* find start of bss segment */ |
| 397 | add r0, r0, r2 |
| 398 | ldr r1, _bss_end_ofs /* stop here */ |
| 399 | add r1, r1, r2 |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 400 | mov r2, #0x00000000 /* clear */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 401 | |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 402 | #ifndef CONFIG_PRELOADER |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 403 | clbss_l:str r2, [r0] /* clear loop... */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 404 | add r0, r0, #4 |
| 405 | cmp r0, r1 |
| 406 | bne clbss_l |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 407 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 408 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 409 | ldr r0, _start_armboot_ofs |
| 410 | adr r1, _start |
| 411 | add r0, r0, r1 |
| 412 | ldr pc, r0 |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 413 | |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 414 | _start_armboot_ofs: |
Magnus Lilja | 40c642b | 2009-06-13 20:50:01 +0200 | [diff] [blame] | 415 | #ifdef CONFIG_NAND_SPL |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 416 | .word nand_boot - _start |
Magnus Lilja | 40c642b | 2009-06-13 20:50:01 +0200 | [diff] [blame] | 417 | #else |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 418 | #ifdef CONFIG_ONENAND_IPL |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 419 | .word start_oneboot - _start |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 420 | #else |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 421 | .word start_armboot - _start |
Magnus Lilja | 40c642b | 2009-06-13 20:50:01 +0200 | [diff] [blame] | 422 | #endif /* CONFIG_ONENAND_IPL */ |
| 423 | #endif /* CONFIG_NAND_SPL */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 424 | |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 425 | #endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */ |
| 426 | |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 427 | /* |
| 428 | ************************************************************************* |
| 429 | * |
| 430 | * CPU_init_critical registers |
| 431 | * |
| 432 | * setup important registers |
| 433 | * setup memory timing |
| 434 | * |
| 435 | ************************************************************************* |
| 436 | */ |
Magnus Lilja | 40c642b | 2009-06-13 20:50:01 +0200 | [diff] [blame] | 437 | #ifndef CONFIG_SKIP_LOWLEVEL_INIT |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 438 | cpu_init_crit: |
| 439 | /* |
| 440 | * flush v4 I/D caches |
| 441 | */ |
| 442 | mov r0, #0 |
George G. Davis | 409a07c | 2010-05-11 10:15:36 -0400 | [diff] [blame] | 443 | mcr p15, 0, r0, c7, c7, 0 /* Invalidate I+D+BTB caches */ |
| 444 | mcr p15, 0, r0, c8, c7, 0 /* Invalidate Unified TLB */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 445 | |
| 446 | /* |
| 447 | * disable MMU stuff and caches |
| 448 | */ |
| 449 | mrc p15, 0, r0, c1, c0, 0 |
| 450 | bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS) |
| 451 | bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM) |
| 452 | orr r0, r0, #0x00000002 @ set bit 2 (A) Align |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 453 | orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 454 | mcr p15, 0, r0, c1, c0, 0 |
| 455 | |
| 456 | /* |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 457 | * Jump to board specific initialization... The Mask ROM will have already initialized |
| 458 | * basic memory. Go here to bump up clock rate and handle wake up conditions. |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 459 | */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 460 | mov ip, lr /* persevere link reg across call */ |
Wolfgang Denk | 87cb686 | 2005-10-06 17:08:18 +0200 | [diff] [blame] | 461 | bl lowlevel_init /* go setup pll,mux,memory */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 462 | mov lr, ip /* restore link */ |
| 463 | mov pc, lr /* back to my caller */ |
Magnus Lilja | 40c642b | 2009-06-13 20:50:01 +0200 | [diff] [blame] | 464 | #endif /* CONFIG_SKIP_LOWLEVEL_INIT */ |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 465 | |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 466 | #ifndef CONFIG_PRELOADER |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 467 | /* |
| 468 | ************************************************************************* |
| 469 | * |
| 470 | * Interrupt handling |
| 471 | * |
| 472 | ************************************************************************* |
| 473 | */ |
| 474 | @ |
| 475 | @ IRQ stack frame. |
| 476 | @ |
| 477 | #define S_FRAME_SIZE 72 |
| 478 | |
| 479 | #define S_OLD_R0 68 |
| 480 | #define S_PSR 64 |
| 481 | #define S_PC 60 |
| 482 | #define S_LR 56 |
| 483 | #define S_SP 52 |
| 484 | |
| 485 | #define S_IP 48 |
| 486 | #define S_FP 44 |
| 487 | #define S_R10 40 |
| 488 | #define S_R9 36 |
| 489 | #define S_R8 32 |
| 490 | #define S_R7 28 |
| 491 | #define S_R6 24 |
| 492 | #define S_R5 20 |
| 493 | #define S_R4 16 |
| 494 | #define S_R3 12 |
| 495 | #define S_R2 8 |
| 496 | #define S_R1 4 |
| 497 | #define S_R0 0 |
| 498 | |
| 499 | #define MODE_SVC 0x13 |
| 500 | #define I_BIT 0x80 |
| 501 | |
| 502 | /* |
| 503 | * use bad_save_user_regs for abort/prefetch/undef/swi ... |
| 504 | * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling |
| 505 | */ |
| 506 | |
| 507 | .macro bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 508 | sub sp, sp, #S_FRAME_SIZE @ carve out a frame on current user stack |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 509 | stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12 |
| 510 | |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 511 | #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
| 512 | ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort stack |
| 513 | #else |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 514 | adr r2, _start |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 515 | sub r2, r2, #(CONFIG_SYS_MALLOC_LEN) |
Wolfgang Denk | 25ddd1f | 2010-10-26 14:34:52 +0200 | [diff] [blame] | 516 | sub r2, r2, #(GENERATED_GBL_DATA_SIZE+8) @ set base 2 words into abort stack |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 517 | #endif |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 518 | ldmia r2, {r2 - r3} @ get values for "aborted" pc and cpsr (into parm regs) |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 519 | add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack |
| 520 | |
| 521 | add r5, sp, #S_SP |
| 522 | mov r1, lr |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 523 | stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr |
| 524 | mov r0, sp @ save current stack into r0 (param register) |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 525 | .endm |
| 526 | |
| 527 | .macro irq_save_user_regs |
| 528 | sub sp, sp, #S_FRAME_SIZE |
| 529 | stmia sp, {r0 - r12} @ Calling r0-r12 |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 530 | add r8, sp, #S_PC @ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good. |
| 531 | stmdb r8, {sp, lr}^ @ Calling SP, LR |
| 532 | str lr, [r8, #0] @ Save calling PC |
| 533 | mrs r6, spsr |
| 534 | str r6, [r8, #4] @ Save CPSR |
| 535 | str r0, [r8, #8] @ Save OLD_R0 |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 536 | mov r0, sp |
| 537 | .endm |
| 538 | |
| 539 | .macro irq_restore_user_regs |
| 540 | ldmia sp, {r0 - lr}^ @ Calling r0 - lr |
| 541 | mov r0, r0 |
| 542 | ldr lr, [sp, #S_PC] @ Get PC |
| 543 | add sp, sp, #S_FRAME_SIZE |
| 544 | subs pc, lr, #4 @ return & move spsr_svc into cpsr |
| 545 | .endm |
| 546 | |
| 547 | .macro get_bad_stack |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 548 | #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
| 549 | ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter in banked mode) |
| 550 | #else |
Heiko Schocher | bafe743 | 2010-10-13 07:57:14 +0200 | [diff] [blame] | 551 | adr r13, _start @ setup our mode stack (enter in banked mode) |
| 552 | sub r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN) @ move past malloc pool |
Wolfgang Denk | 25ddd1f | 2010-10-26 14:34:52 +0200 | [diff] [blame] | 553 | sub r13, r13, #(GENERATED_GBL_DATA_SIZE+8) @ move to reserved a couple spots for abort stack |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 554 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 555 | |
| 556 | str lr, [r13] @ save caller lr in position 0 of saved stack |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 557 | mrs lr, spsr @ get the spsr |
| 558 | str lr, [r13, #4] @ save spsr in position 1 of saved stack |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 559 | |
| 560 | mov r13, #MODE_SVC @ prepare SVC-Mode |
| 561 | @ msr spsr_c, r13 |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 562 | msr spsr, r13 @ switch modes, make sure moves will execute |
| 563 | mov lr, pc @ capture return pc |
| 564 | movs pc, lr @ jump to next instruction & switch modes. |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 565 | .endm |
| 566 | |
| 567 | .macro get_bad_stack_swi |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 568 | sub r13, r13, #4 @ space on current stack for scratch reg. |
| 569 | str r0, [r13] @ save R0's value. |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 570 | #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
| 571 | ldr r0, IRQ_STACK_START_IN @ get data regions start |
| 572 | #else |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 573 | ldr r0, _armboot_start @ get data regions start |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 574 | sub r0, r0, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool |
Wolfgang Denk | 25ddd1f | 2010-10-26 14:34:52 +0200 | [diff] [blame] | 575 | sub r0, r0, #(GENERATED_GBL_DATA_SIZE+8) @ move past gbl and a couple spots for abort stack |
Heiko Schocher | e48b7c0 | 2010-09-17 13:10:40 +0200 | [diff] [blame] | 576 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 577 | str lr, [r0] @ save caller lr in position 0 of saved stack |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 578 | mrs r0, spsr @ get the spsr |
| 579 | str lr, [r0, #4] @ save spsr in position 1 of saved stack |
| 580 | ldr r0, [r13] @ restore r0 |
| 581 | add r13, r13, #4 @ pop stack entry |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 582 | .endm |
| 583 | |
| 584 | .macro get_irq_stack @ setup IRQ stack |
| 585 | ldr sp, IRQ_STACK_START |
| 586 | .endm |
| 587 | |
| 588 | .macro get_fiq_stack @ setup FIQ stack |
| 589 | ldr sp, FIQ_STACK_START |
| 590 | .endm |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 591 | #endif /* CONFIG_PRELOADER */ |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 592 | |
| 593 | /* |
| 594 | * exception handlers |
| 595 | */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 596 | #ifdef CONFIG_PRELOADER |
Kyungmin Park | 751b9b5 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 597 | .align 5 |
| 598 | do_hang: |
| 599 | ldr sp, _TEXT_BASE /* use 32 words about stack */ |
| 600 | bl hang /* hang and never return */ |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 601 | #else /* !CONFIG_PRELOADER */ |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 602 | .align 5 |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 603 | undefined_instruction: |
| 604 | get_bad_stack |
| 605 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 606 | bl do_undefined_instruction |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 607 | |
| 608 | .align 5 |
| 609 | software_interrupt: |
| 610 | get_bad_stack_swi |
| 611 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 612 | bl do_software_interrupt |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 613 | |
| 614 | .align 5 |
| 615 | prefetch_abort: |
| 616 | get_bad_stack |
| 617 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 618 | bl do_prefetch_abort |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 619 | |
| 620 | .align 5 |
| 621 | data_abort: |
| 622 | get_bad_stack |
| 623 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 624 | bl do_data_abort |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 625 | |
| 626 | .align 5 |
| 627 | not_used: |
| 628 | get_bad_stack |
| 629 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 630 | bl do_not_used |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 631 | |
| 632 | #ifdef CONFIG_USE_IRQ |
| 633 | |
| 634 | .align 5 |
| 635 | irq: |
| 636 | get_irq_stack |
| 637 | irq_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 638 | bl do_irq |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 639 | irq_restore_user_regs |
| 640 | |
| 641 | .align 5 |
| 642 | fiq: |
| 643 | get_fiq_stack |
| 644 | /* someone ought to write a more effiction fiq_save_user_regs */ |
| 645 | irq_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 646 | bl do_fiq |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 647 | irq_restore_user_regs |
| 648 | |
| 649 | #else |
| 650 | |
| 651 | .align 5 |
| 652 | irq: |
| 653 | get_bad_stack |
| 654 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 655 | bl do_irq |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 656 | |
| 657 | .align 5 |
| 658 | fiq: |
| 659 | get_bad_stack |
| 660 | bad_save_user_regs |
wdenk | 082acfd | 2005-01-10 00:01:04 +0000 | [diff] [blame] | 661 | bl do_fiq |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 662 | |
| 663 | #endif |
| 664 | .align 5 |
| 665 | .global arm1136_cache_flush |
| 666 | arm1136_cache_flush: |
Heiko Schocher | 7e4a9e6 | 2010-09-17 13:10:32 +0200 | [diff] [blame] | 667 | #if !defined(CONFIG_SYS_NO_ICACHE) |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 668 | mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache |
Heiko Schocher | 7e4a9e6 | 2010-09-17 13:10:32 +0200 | [diff] [blame] | 669 | #endif |
| 670 | #if !defined(CONFIG_SYS_NO_DCACHE) |
| 671 | mcr p15, 0, r1, c7, c14, 0 @ invalidate D cache |
| 672 | #endif |
wdenk | 8ed9604 | 2005-01-09 23:16:25 +0000 | [diff] [blame] | 673 | mov pc, lr @ back to caller |
Magnus Lilja | df81238 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 674 | #endif /* CONFIG_PRELOADER */ |