1/* 2 * The head-file for SH-Mobile ARM platforms 3 * 4 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 5 * Simon Horman <horms@verge.net.au> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; version 2 of the License. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifdef CONFIG_ZBOOT_ROM 22 23 .section ".start", "ax" 24 25 /* load board-specific initialization code */ 26#include <mach/zboot.h> 27 28#if defined(CONFIG_ZBOOT_ROM_MMCIF) || defined(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI) 29 /* Load image from MMC/SD */ 30 adr sp, __tmp_stack + 256 31 ldr r0, __image_start 32 ldr r1, __image_end 33 subs r1, r1, r0 34 ldr r0, __load_base 35 bl mmc_loader 36 37 /* Jump to loaded code */ 38 ldr r0, __loaded 39 ldr r1, __image_start 40 sub r0, r0, r1 41 ldr r1, __load_base 42 add pc, r0, r1 43 44__image_start: 45 .long _start 46__image_end: 47 .long _got_end 48__load_base: 49 .long MEMORY_START + 0x02000000 @ Load at 32Mb into SDRAM 50__loaded: 51 .long __continue 52 .align 53__tmp_stack: 54 .space 256 55__continue: 56#endif /* CONFIG_ZBOOT_ROM_MMC || CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI */ 57 58 adr r0, dtb_info 59 ldmia r0, {r1, r3, r4, r5, r7} 60 61 sub r0, r0, r1 @ calculate the delta offset 62 add r5, r5, r0 @ _edata 63 64 ldr lr, [r5, #0] @ check if valid DTB is present 65 cmp lr, r3 66 bne 0f 67 68 add r9, r7, #31 @ rounded up to a multiple 69 bic r9, r9, #31 @ ... of 32 bytes 70 71 add r6, r9, r5 @ copy from _edata 72 add r9, r9, r4 @ to MEMORY_START 73 741: ldmdb r6!, {r0 - r3, r10 - r12, lr} 75 cmp r6, r5 76 stmdb r9!, {r0 - r3, r10 - r12, lr} 77 bhi 1b 78 79 /* Success: Zero board ID, pointer to start of memory for atag/dtb */ 80 mov r7, #0 81 mov r8, r4 82 b 2f 83 84 .align 2 85dtb_info: 86 .word dtb_info 87#ifndef __ARMEB__ 88 .word 0xedfe0dd0 @ sig is 0xd00dfeed big endian 89#else 90 .word 0xd00dfeed 91#endif 92 .word MEMORY_START 93 .word _edata 94 .word 0x4000 @ maximum DTB size 950: 96 /* Failure: Zero board ID, NULL atag/dtb */ 97 mov r7, #0 98 mov r8, #0 @ pass null pointer as atag 992 : 100 101#endif /* CONFIG_ZBOOT_ROM */ 102