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comparison gsm-fw/sysglue/flashboot.S @ 636:06ecb305f650

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flashImage for BootROM-enabled targets: put something sensible at 0
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Mon, 01 Sep 2014 19:34:31 +0000
parents 658a83ff7221
children a8fc7526935e
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635:658a83ff7221 636:06ecb305f650
2 * This assembly module contains those bits which are specific to flashable 2 * This assembly module contains those bits which are specific to flashable
3 * image builds only. It puts bits of code into several different sections. 3 * image builds only. It puts bits of code into several different sections.
4 */ 4 */
5 5
6 #include "../include/config.h" 6 #include "../include/config.h"
7
8 #if FLASH_BOOT_VIA_BOOTROM
9 /*
10 * Put something sensible in the boot ROM overlay area, just for the
11 * heck of it, or for extra robustness.
12 */
13 .section bootrom.overlay,"ax",%progbits
14 .code 32
15 .org 0
16 b BootROM_disabled_entry
17 #include "vectors.S"
18 BootROM_disabled_entry:
19 /* copy the boot ROM switch code to IRAM and jump to it */
20 ldr r4, =__romswitch_flash_addr
21 ldr r5, =__romswitch_ram_addr
22 ldr r2, =__romswitch_size
23 1: ldr r0, [r4], #4
24 str r0, [r5], #4
25 subs r2, r2, #4
26 bhi 1b
27 ldr pc, =__romswitch_ram_addr
28
29 .section bootrom.switch,"ax",%progbits
30 .code 32
31 .org 0
32 @ enable the Calypso boot ROM
33 ldr r1, =0xFFFFFB10
34 mov r2, #0x0100
35 strh r2, [r1]
36 @ jump to it!
37 mov pc, #0
38 #endif
7 39
8 .section flashboot.text,"ax",%progbits 40 .section flashboot.text,"ax",%progbits
9 .code 32 41 .code 32
10 .org 0 42 .org 0
11 #if FLASH_BOOT_VIA_BOOTROM 43 #if FLASH_BOOT_VIA_BOOTROM