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ARM: da8xxevm: README: Add NOR booting instructions

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The da850evm with its UI expander board can boot XIP boot from
NOR flash.  This adds the instructions to the readme. file.

Signed-off-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Adam Ford 2018-08-11 07:34:55 -05:00 committed by Tom Rini
parent c4fa049a12
commit 09d841176d
1 changed files with 19 additions and 0 deletions
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board/davinci/da8xxevm/README.da850
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@ -112,6 +112,25 @@ uflash writes the AIS image at offset 117. For compatibility with uflash,
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR is set to take into account this CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR is set to take into account this
offset, and the dd command is adjusted accordingly. offset, and the dd command is adjusted accordingly.
Flashing the images to NOR
==========================
NOR Flash is XIP (execute-in-place), so no AIS (or SPL) is needed. The
u-boot.bin is directy flashed, but CONFIT_DA850_LOWLEVEL must be set
to initialize hardware that's normally done by SPL.
For this case, CONFIG_SYS_TEXT_BASE=0x60000000 which is the address to
which the bootloader jumps when powered on.
Example:
For the da850evm, there is a defconfig setup to use the NOR flash on
the UI expander board called da850evm_direct_nor_defconfig.
Flash to NOR directly using
sudo mono ./sfh_OMAP-L138.exe -p /dev/ttyUSB0 -flash_noubl
-flashType NOR u-boot.bin
SW7:5 through SW7:7 should be switched on and all others off.
Recovery Recovery
======== ========