diff options
Diffstat (limited to 'doc/README.mx28_common')
| -rw-r--r-- | doc/README.mx28_common | 60 |
1 files changed, 36 insertions, 24 deletions
diff --git a/doc/README.mx28_common b/doc/README.mx28_common index 5289ee4597..5d9e72f958 100644 --- a/doc/README.mx28_common +++ b/doc/README.mx28_common @@ -1,12 +1,15 @@ -Booting U-boot on a MX28 processor -================================== +Booting U-boot on a MXS processor +================================= -This document describes the MX28 U-Boot port. This document mostly -covers topics related to making the module/board bootable. +This document describes the MXS U-Boot port. This document mostly covers topics +related to making the module/board bootable. Terminology ----------- +The term "MXS" refers to a family of Freescale SoCs that is composed by MX23 +and MX28. + The dollar symbol ($) introduces a snipped of shell code. This shall be typed into the unix command prompt in U-Boot source code root directory. @@ -17,16 +20,16 @@ Contents -------- 1) Prerequisites -2) Compiling U-Boot for a MX28 based board -3) Installation of U-Boot for a MX28 based board to SD card -4) Installation of U-Boot into NAND flash +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 1) Prerequisites ---------------- -To make a MX28 based board bootable, some tools are necessary. The first one -is the "elftosb" tool distributed by Freescale Semiconductor. The other one -is the "mxsboot" tool found in U-Boot source tree. +To make a MXS based board bootable, some tools are necessary. The first one is +the "elftosb" tool distributed by Freescale Semiconductor. The other one is the +"mxsboot" tool found in U-Boot source tree. Firstly, obtain the elftosb archive from the following location: @@ -60,18 +63,18 @@ copy the binary by hand: Make sure the "elftosb" binary can be found in your $PATH, in this case this means "/usr/local/bin/" has to be in your $PATH. -2) Compiling U-Boot for a MX28 based board +2) Compiling U-Boot for a MXS based board ------------------------------------------- -Compiling the U-Boot for a MX28 board is straightforward and done as compiling +Compiling the U-Boot for a MXS board is straightforward and done as compiling U-Boot for any other ARM device. For cross-compiler setup, please refer to ELDK5.0 documentation. First, clean up the source code: $ make mrproper -Next, configure U-Boot for a MX28 based board +Next, configure U-Boot for a MXS based board - $ make <mx28_based_board_name>_config + $ make <mxs_based_board_name>_config Examples: @@ -83,8 +86,16 @@ Examples: $ make mx28evk_config +3. For building U-boot for Freescale MX23EVK board: + + $ make mx23evk_config + +4. For building U-boot for Olimex MX23 Olinuxino board: + + $ make mx23_olinuxino_config + Lastly, compile U-Boot and prepare a "BootStream". The "BootStream" is a special -type of file, which the i.MX28 CPU can boot. This is handled by the following +type of file, which MXS CPUs can boot. This is handled by the following command: $ make u-boot.sb @@ -96,11 +107,12 @@ The code produces "u-boot.sb" file. This file needs to be augmented with a proper header to allow successful boot from SD or NAND. Adding the header is discussed in the following chapters. -3) Installation of U-Boot for a MX28 based board to SD card ------------------------------------------------------------ +3) Installation of U-Boot for a MXS based board to SD card +---------------------------------------------------------- -To boot a MX28 based board from SD, set the boot mode DIP switches according -to i.MX28 manual chapter 12.2.1 (Table 12-2). +To boot a MXS based board from SD, set the boot mode DIP switches according to +to MX28 manual, section 12.2.1 (Table 12-2) or MX23 manual, section 35.1.2 +(Table 35-3). The SD card used to boot U-Boot must contain a DOS partition table, which in turn carries a partition of special type and which contains a special header. @@ -138,17 +150,17 @@ case, we assume the first partition of the SD card is /dev/mmcblk0p1: $ dd if=u-boot.sd of=/dev/mmcblk0p1 -Last step is to insert the card into MX28 based board and boot. +Last step is to insert the card into the MXS based board and boot. NOTE: If the user needs to adjust the start sector, the "mxsboot" tool contains a "-p" switch for that purpose. The "-p" switch takes the sector number as an argument. -4) Installation of U-Boot into NAND flash ------------------------------------------ +4) Installation of U-Boot into NAND flash on a MX28 based board +--------------------------------------------------------------- To boot a MX28 based board from NAND, set the boot mode DIP switches according -to i.MX28 manual chapter 12.2.1 (Table 12-2), PORT=GPMI, NAND 1.8 V. +to MX28 manual section 12.2.1 (Table 12-2), PORT=GPMI, NAND 1.8 V. There are two possibilities when preparing an image writable to NAND flash. @@ -211,7 +223,7 @@ There are two possibilities when preparing an image writable to NAND flash. -------------------------------------------- There is a slight possibility of the user wanting to adjust the STRIDE and COUNT options of the NAND boot. For description of these, - see i.MX28 manual section 12.12.1.2 and 12.12.1.3. + see MX28 manual section 12.12.1.2 and 12.12.1.3. The update scripts take this possibility into account. In case the user changes STRIDE by blowing fuses, the user also has to change |