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Konstantin Porotchkinfa61ef62016-12-08 12:22:28 +02001BUBT (Burn ATF) command
2--------------------------
3Bubt command is used to burn a new ATF image to flash device.
4
5The bubt command gets the following parameters: ATF file name, destination device and source device.
6bubt [file-name] [destination [source]]
7 - file-name Image file name to burn. default = flash-image.bin
8 - destination Flash to burn to [spi, nand, mmc]. default = active flash
9 - source Source to load image from [tftp, usb]. default = tftp
10
11Examples:
12 bubt - Burn flash-image.bin from tftp to active flash
13 bubt latest-spi.bin nand - Burn latest-spi.bin from tftp to NAND flash
14
15Notes:
16- For the TFTP interface set serverip and ipaddr.
17- To burn image to SD/eMMC device, the target is defined
18 by parameters CONFIG_SYS_MMC_ENV_DEV and CONFIG_SYS_MMC_ENV_PART.
19
20Bubt command details (burn image step by-step)
21----------------------------------------------
22This section describes bubt command flow:
23
241. Fetch the requested ATF image from an available interface (USB/SD/SATA/XDB, etc.)
25 into the DRAM, and place it at <load_address>
26 Example: when using the FAT file system on USB flash device:
27 # usb reset
28 # fatls usb 0 (see files in device)
29 # fatload usb 0 <load_address> <file_name>
30
312. Erase the target device:
32 - NAND: # nand erase 0 100000
33 - SPI: # sf probe 0
34 # sf erase 0 100000
35 - SD/eMMC: # mmc dev <dev_id> <boot_partition>
36
37Notes:
38- The eMMC has 2 boot partitions (BOOT0 and BOOT1) and a user data partition (DATA).
39 The boot partitions are numbered as partition 1 and 2 in MMC driver.
40 Number 0 is used for user data partition and should not be utilized for storing
41 boot images and U-Boot environment in RAW mode since it will break file system
42 structures usually located here.
43 The default boot partition is BOOT0. It is selected by the following parameter:
44 CONFIG_SYS_MMC_ENV_PART=1
45 Valid values for this parameter are 1 for BOOT0 and 2 for BOOT1.
46 Please never use partition number 0 here!
Konstantin Porotchkinfa61ef62016-12-08 12:22:28 +020047- The partition number is ignored if the target device is SD card.
48- The boot image offset starts at block 0 for eMMC and block 1 for SD devices.
49 The block 0 on SD devices is left for MBR storage.
50
513. Write the ATF image:
52 - NAND: # nand write <load_address> 0 <ATF Size>
53 - SPI: # sf write <load_address> 0 <ATF Size>
54 - SD/eMMC: # mmc write <load_address> [0|1] <ATF Size>/<block_size>
55