-Booting U-boot on a MXS processor
+Booting U-Boot on a MXS processor
=================================
This document describes the MXS U-Boot port. This document mostly covers topics
2) Compiling U-Boot for a MXS based board
3) Installation of U-Boot for a MXS based board to SD card
4) Installation of U-Boot into NAND flash on a MX28 based board
+5) Installation of U-Boot into SPI NOR flash on a MX28 based board
1) Prerequisites
----------------
Examples:
-1. For building U-boot for Denx M28EVK board:
+1. For building U-Boot for Aries M28EVK board:
$ make m28evk_config
-2. For building U-boot for Freescale MX28EVK board:
+2. For building U-Boot for Freescale MX28EVK board:
$ make mx28evk_config
-3. For building U-boot for Freescale MX23EVK board:
+3. For building U-Boot for Freescale MX23EVK board:
$ make mx23evk_config
-4. For building U-boot for Olimex MX23 Olinuxino board:
+4. For building U-Boot for Olimex MX23 Olinuxino board:
$ make mx23_olinuxino_config
This script expects a working TFTP server containing the file
"u-boot.nand" in it's root directory. This can be changed by
- adjusting the "update_nand_full_filename" varible.
+ adjusting the "update_nand_full_filename" variable.
To update the system, run the following in U-Boot prompt:
This script expects a working TFTP server containing the file
"u-boot.sb" in it's root directory. This can be changed by
- adjusting the "update_nand_firmware_filename" varible.
+ adjusting the "update_nand_firmware_filename" variable.
To update the system, run the following in U-Boot prompt:
In case the user needs to boot a firmware image bigger than 1Mb, the
user has to adjust the "update_nand_firmware_maxsz" variable for the
update scripts to work properly.
+
+5) Installation of U-Boot into SPI NOR flash on a MX28 based board
+------------------------------------------------------------------
+
+The u-boot.sb file can be directly written to SPI NOR from U-Boot prompt.
+
+Load u-boot.sb into RAM, this can be done in several ways and one way is to use
+tftp:
+ => tftp u-boot.sb 0x42000000
+
+Probe the SPI NOR flash:
+ => sf probe
+
+(SPI NOR should be succesfully detected in this step)
+
+Erase the blocks where U-Boot binary will be written to:
+ => sf erase 0x0 0x80000
+
+Write u-boot.sb to SPI NOR:
+ => sf write 0x42000000 0 0x80000
+
+Power off the board and set the boot mode DIP switches to boot from the SPI NOR
+according to MX28 manual section 12.2.1 (Table 12-2)
+
+Last step is to power up the board and U-Boot should start from SPI NOR.