blob: e8c589b92aad9d3b4a202cfa536a21e5ad79a725 [file] [log] [blame]
Vanessa Maegimad7c11502017-06-29 09:33:46 -03001How to use and build U-Boot on mx6sabreauto
2-------------------------------------------
3
4mx6sabreauto_defconfig target supports mx6q/mx6dl/mx6qp sabreauto variants.
5
6In order to build it:
7
8$ make mx6sabreauto_defconfig
9
10$ make
11
12This will generate the SPL and u-boot.img binaries.
13
14- Flash the SPL binary into the SD card:
15
16$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync
17
18- Flash the u-boot.img binary into the SD card:
19
20$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync
Diego Dorta07f6ddb2017-07-07 15:38:34 -030021
22Booting via Falcon mode
23-----------------------
24
25Write in mx6sabreauto_defconfig the following define below:
26
27CONFIG_SPL_OS_BOOT=y
28
29In order to build it:
30
31$ make mx6sabreauto_defconfig
32
33$ make
34
35This will generate the SPL image called SPL and the u-boot.img.
36
37- Flash the SPL image into the SD card:
38
39$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync
40
41- Flash the u-boot.img image into the SD card:
42
43$ sudo dd if=u-boot.img of=/dev/sdb bs=1K seek=69 && sync
44
45Create a FAT16 boot partition to store uImage and the dtb file, then copy the files there:
46
47$ sudo cp uImage /media/boot
48
49$ sudo cp imx6dl-sabreauto.dtb /media/boot
50
51Create a partition for root file system and extract it there:
52
53$ sudo tar xvf rootfs.tar.gz -C /media/root
54
55The SD card must have enough space for raw "args" and "kernel".
56To configure Falcon mode for the first time, on U-Boot do the following commands:
57
58- Load dtb file from boot partition:
59
60# load mmc 0:1 ${fdt_addr} imx6dl-sabreauto.dtb
61
62- Load kernel image from boot partition:
63
64# load mmc 0:1 ${loadaddr} uImage
65
66- Write kernel at 2MB offset:
67
68# mmc write ${loadaddr} 0x1000 0x4000
69
70- Setup kernel bootargs:
71
72# setenv bootargs "console=ttymxc3,115200 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait quiet rw"
73
74- Prepare args:
75
76# spl export fdt ${loadaddr} - ${fdt_addr}
77
78- Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors)
79
80# mmc write 18000000 0x800 0x800
81
82- Restart the board and then SPL binary will launch the kernel directly.