Changes between Version 2 and Version 3 of newport/firmware

Timestamp:

07/31/2018 09:11:46 PM (6 years ago)

Author:

Cale Collins

Comment:

Added booting kernel/rootfs on the microSD section

newport/firmware

@@ -263 +263 @@
 Updates on the root filesystem are very use specific. You can use a package manager, or use multiple rootfs partitions on the FLASH selected by U-Boot when setting up the bootargs passed to the kernel. A common way to to this would be to use U-Boot variables as flags and counters that are altered within Linux via the fw_setenv/fw_printenv tools from the U-Boot {{{u-boot-tools}}} package. You can see example usages in the Newport BSP newport/Makefile.
 
+== Booting to a kernel/rootfs on the microSD
+This assumes the bootloader will remain on the eMMC, but then we switch to the microSD for the kernel/rootfs.
+
+Run the following commands in the uboot bootloader command prompt on the Newport SBC bootloader serial console:
+{{{
+
+#This sets the bootargs, make special note of the root = and adjust partition as necessary
+setenv bootargs 'cma=64M coherent_pool=16M net.ifnames=0 root=/dev/mmcblk1p1 rw rootwait console=ttyAMA0,115200n8 earlycon=pl011,0x87e028000000'
+
+#This loads the kernel file (Image) from folder boot (on microSD) into memory
+ext4load mmc 1:1 ${kernel_addr_r} boot/Image
+
+#This boots the board
+booti ${kernel_addr_r} - ${fdtcontroladdr}
+}}}
+
+Troubleshooting:
+ * Use the ext4ls to confirm you can read the microSD and see the kernel in the boot folder
+{{{
+GW6304-B> ext4ls mmc 1:1 boot
+<DIR>       4096 .
+<DIR>       4096 ..
+        12066824 Image
+}}}
+
 [=#recovery]
 = Creating a microSD recovery image =