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annotate gsm-fw/sysglue/flashboot.S @ 631:7cf154cd3891

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gsm-fw/sysglue: prep for building flashable images
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Mon, 01 Sep 2014 17:04:19 +0000
parents
children 1f54d2ba42c2
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631
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 * This assembly module contains those bits which are specific to flashable
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 * image builds only. It puts bits of code into several different sections.
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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5
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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6 #include "../include/config.h"
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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7
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 .section flashboot.text,"ax",%progbits
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9 .code 32
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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10 .org 0
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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11 #if FLASH_BOOT_VIA_BOOTROM
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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12 /* sane targets with Calypso boot ROM enabled by the PCB wiring */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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13 /* provide the necessary magic words for the boot ROM */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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14 .word 0
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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15 .word _Flash_boot_entry
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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16 #elif CONFIG_TARGET_C139
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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17 /*
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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18 * On this target we are going to put a special flash boot stage at 0x2000,
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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19 * and then the actual gsm-fw image at the flash erase block boundary
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 * at 0x10000. The following bits will be read by our intermediate
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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21 * flash boot stage.
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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22 */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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23 .asciz "FreeCalypso"
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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24 .word _Flash_boot_entry
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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25 #elif CONFIG_TARGET_C155
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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26 /*
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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27 * On this target the hand-off point between the bootloader and the main
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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28 * fw image coincides with a flash erase block boundary, thus no need
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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29 * for an intermediate flash boot stage. The following bits will appear
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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30 * at 0x20000.
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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31 */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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32 .asciz "FreeCalypso firmware for C155/156 target"
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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33 .org 0xE0
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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34 /* C155/156 bootloader jumps here */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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35 b _Flash_boot_entry
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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36 #include "vectors.S"
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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37 #else
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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38 #error "Unsupported flash boot configuration"
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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39 #endif
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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40
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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41 .globl _Flash_boot_entry
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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42 _Flash_boot_entry:
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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43 /* first order of business: configure flash and XRAM access */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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44 ldr r2, =0xFFFFFB00
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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45 #if CONFIG_TARGET_PIRELLI
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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46 mov r0, #0x00A4
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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47 strh r0, [r2, #0]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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48 strh r0, [r2, #2]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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49 strh r0, [r2, #6]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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50 #else
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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51 mov r0, #0x00A3
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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52 strh r0, [r2, #0]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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53 strh r0, [r2, #2]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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54 #endif
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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55 /*
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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56 * Switch the CS4/ADD22 pin to the ADD22 function. We only need this
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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57 * setting on targets with 8 MiB flash (or XRAM) banks, but it doesn't
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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58 * hurt to do it on all targets (like TI's original code does),
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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59 * until and unless we encounter a target that uses the CS4 function.
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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60 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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61 ldr r1, =0xFFFEF006
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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62 mov r2, #0x0008
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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63 strh r2, [r1]
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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64 /* we now have full access to all flash and RAM on the device */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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65 /* copy iram.text to where it's supposed to be */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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66 ldr r8, =__iramtext_flash_addr
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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67 ldr r9, =__iramtext_ram_addr
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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68 ldr r10, =__iramtext_size
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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69 1: ldmia r8!, {r0-r7}
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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70 stmia r9!, {r0-r7}
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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71 subs r10, r10, #0x20
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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72 bhi 1b
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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73 /* likewise copy .data from flash to XRAM */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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74 ldr r8, =__initdata_flash_addr
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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75 ldr r9, =__initdata_ram_addr
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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76 ldr r10, =__initdata_size
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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77 1: ldmia r8!, {r0-r7}
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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78 stmia r9!, {r0-r7}
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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79 subs r10, r10, #0x20
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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80 bhi 1b
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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81 /* boot path joins with fc-xram loadable builds */
7cf154cd3891 gsm-fw/sysglue: prep for building flashable images
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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82 b _FlashorXram_entry