DDR3L main memory (2Gbyte) †
4000_0000 start
C000_0000 end
boot stage †
| Boot stage | Exception level | Description |
| BL1 | EL3 | Trusted bootstrap; cold/warm boot detection |
| BL2 | EL1S | Trusted bootloader |
| BL31 | EL3 | Resident runtime firmware |
| BL32 | EL1S | [Optional] Trusted operating system |
| BL33 | EL2 | Normal world bootloader |
source †
BL2, BL31 †
$ bitbake arm-trusted-firmware
source
build/tmp/work/ek874-poky-linux/arm-trusted-firmware/v1.5+renesas+gitAUTOINC+236f8fbb57-r0/git
binary
build/tmp/deploy/images/ek874
bl2-ek874.srec
bl31-ek874.srec
bootparam_sa0.srec
cert_header_sa6.srec
u-boot †
$ bitbake u-boot
source
build/tmp/work/ek874-poky-linux/u-boot/1_v2018.09+gitAUTOINC+d2e3e367b6-r0/git
binary
build/tmp/deploy/images/ek874
u-boot-elf-ek874.srec
memory map †
BL2 †
| Name | Size | LMA | File off |
| ro | 0000c000 | e6304000 | 00004000 |
| .data | 000000dc | e6310000 | 00010000 |
| stacks | 00001000 | e6310100 | 000100dc |
| .bss | 00000574 | e6311100 | 000100dc |
| coherent_ram | 00000000 | e6312000 | 00011000 |
BL31 †
start address 0x44000000 (size 0x4000)
Program Header:
LOAD off 0x00010000 vaddr 0x44000000 paddr 0x44000000 align 2**16
filesz 0x000080b0 memsz 0x00011000 flags rwx
STACK off 0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**4
filesz 0x00000000 memsz 0x00000000 flags rw-
private flags = 0:
Sections:
Idx Name Size VMA LMA File off Algn
0 ro 00000480 44000000 44000000 00010000 2**3
1 . 00007800 44000800 44000800 00010800 2**11
2 .data 00000080 44008000 44008000 00018000 2**3
3 data 00000030 44008080 44008080 00018080 2**3
4 stacks 00002000 440080c0 440080c0 000180b0 2**6
5 .bss 00001814 4400a0c0 4400a0c0 000180b0 2**6
6 xlat_table 00004000 4400c000 4400c000 000180b0 2**12
7 coherent_ram 00001000 44010000 44010000 000180b0 2**12
8 .comment 0000002d 00000000 00000000 000180b0 2**0
9 .debug_frame 000010c8 00000000 00000000 000180e0 2**3
u-boot †
4000_0000 main memory start
first 128MB is reserved for secure area(BL2, BL31)
4800_0000 dtb load address
4808_0000 Image load address
5000_0000 u-boot load address
C000_0000
kernel load †
u-boot kernel load cmd
setenv bootcmd 'fatload mmc 0:1 0x4a000000 Image.gz; unzip 0x4a000000 0x48080000; fatload mmc 0:1 0x48000000 Image-r8a774c0-ek874.dtb; booti 0x48080000 - 0x48000000'
setenv bootargs 'root=/dev/mmcblk0p2 rootwait ro'
関連 †
