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Diffstat (limited to 'doc/README.sbc8548')
| -rw-r--r-- | doc/README.sbc8548 | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/doc/README.sbc8548 b/doc/README.sbc8548 index 5fa9c93..e6b8abe 100644 --- a/doc/README.sbc8548 +++ b/doc/README.sbc8548 @@ -86,6 +86,33 @@ The "md" steps in the above are just a precautionary step that allow you to confirm the u-boot version that was downloaded, and then confirm that it was copied to flash. +The above assumes that you are using the default board settings which +have u-boot in the 8MB flash, tied to /CS0. + +If you are running the default 8MB /CS0 settings but want to store an +image in the SODIMM that is built with CONFIG_SYS_ALT_BOOT enabled, +(as a backup, etc) then the steps will become: + + tftp u-boot.bin + md 200000 10 + protect off all + era eff00000 efffffff + cp.b 200000 eff00000 100000 + md eff00000 10 + protect on all + +Finally, if you are running the alternate 64MB /CS0 settings and want +to update the in-use u-boot image, then (again with CONFIG_SYS_ALT_BOOT +enabled) the steps will become: + + tftp u-boot.bin + md 200000 10 + protect off all + era fff00000 ffffffff + cp.b 200000 fff00000 100000 + md fff00000 10 + protect on all + Hardware Reference: =================== @@ -127,10 +154,9 @@ JP19 PCI mode PCI PCI-X onto /CS0 and the SODIMM flash on /CS6 (default). When JP12 is jumpered parallel to the LBC-SDRAM, then /CS0 is for the SODIMM flash and /CS6 is for the boot flash. Note that in this -alternate setting, you also need to switch SW2.8 to ON. Currently -u-boot doesn't support booting off the SODIMM in this alternate -setting without manually altering BR0/OR0 and BR6/OR6 in the -board config file appropriately. +alternate setting, you also need to switch SW2.8 to ON. +See the setting CONFIG_SYS_ALT_BOOT if you want to use this setting +and boot u-boot from the 64MB SODIMM Switches: |