| /* |
| * The head-file for SH-Mobile ARM platforms |
| * |
| * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| * Simon Horman <horms@verge.net.au> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifdef CONFIG_ZBOOT_ROM |
| |
| .section ".start", "ax" |
| |
| /* load board-specific initialization code */ |
| #include <mach/zboot.h> |
| |
| #if defined(CONFIG_ZBOOT_ROM_MMCIF) || defined(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI) |
| /* Load image from MMC/SD */ |
| adr sp, __tmp_stack + 256 |
| ldr r0, __image_start |
| ldr r1, __image_end |
| subs r1, r1, r0 |
| ldr r0, __load_base |
| bl mmc_loader |
| |
| /* Jump to loaded code */ |
| ldr r0, __loaded |
| ldr r1, __image_start |
| sub r0, r0, r1 |
| ldr r1, __load_base |
| add pc, r0, r1 |
| |
| __image_start: |
| .long _start |
| __image_end: |
| .long _got_end |
| __load_base: |
| .long MEMORY_START + 0x02000000 @ Load at 32Mb into SDRAM |
| __loaded: |
| .long __continue |
| .align |
| __tmp_stack: |
| .space 256 |
| __continue: |
| #endif /* CONFIG_ZBOOT_ROM_MMC || CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI */ |
| |
| adr r0, dtb_info |
| ldmia r0, {r1, r3, r4, r5, r7} |
| |
| sub r0, r0, r1 @ calculate the delta offset |
| add r5, r5, r0 @ _edata |
| |
| ldr lr, [r5, #0] @ check if valid DTB is present |
| cmp lr, r3 |
| bne 0f |
| |
| add r9, r7, #31 @ rounded up to a multiple |
| bic r9, r9, #31 @ ... of 32 bytes |
| |
| add r6, r9, r5 @ copy from _edata |
| add r9, r9, r4 @ to MEMORY_START |
| |
| 1: ldmdb r6!, {r0 - r3, r10 - r12, lr} |
| cmp r6, r5 |
| stmdb r9!, {r0 - r3, r10 - r12, lr} |
| bhi 1b |
| |
| /* Success: Zero board ID, pointer to start of memory for atag/dtb */ |
| mov r7, #0 |
| mov r8, r4 |
| b 2f |
| |
| .align 2 |
| dtb_info: |
| .word dtb_info |
| #ifndef __ARMEB__ |
| .word 0xedfe0dd0 @ sig is 0xd00dfeed big endian |
| #else |
| .word 0xd00dfeed |
| #endif |
| .word MEMORY_START |
| .word _edata |
| .word 0x4000 @ maximum DTB size |
| 0: |
| /* Failure: Zero board ID, NULL atag/dtb */ |
| mov r7, #0 |
| mov r8, #0 @ pass null pointer as atag |
| 2 : |
| |
| #endif /* CONFIG_ZBOOT_ROM */ |
