* Modify bootm command to support booting with flat device trees Patch by Matthew McClintock 26-June-2006
diff --git a/README b/README
index 5ed30f2..0fda03f 100644
--- a/README
+++ b/README
@@ -447,6 +447,11 @@
Board code has addition modification that it wants to make
to the flat device tree before handing it off to the kernel
+ CONFIG_OF_BOOT_CPU
+
+ This define fills in the correct boot cpu in the boot
+ param header, the default value is zero if undefined.
+
- Serial Ports:
CFG_PL010_SERIAL
@@ -3013,6 +3018,55 @@
bash#
+Boot Linux and pass a flat device tree:
+-----------
+
+First, U-Boot must be compiled with the appropriate defines. See the section
+titled "Linux Kernel Interface" above for a more in depth explanation. The
+following is an example of how to start a kernel and pass an updated
+flat device tree:
+
+=> print oftaddr
+oftaddr=0x300000
+=> print oft
+oft=oftrees/mpc8540ads.dtb
+=> tftp $oftaddr $oft
+Speed: 1000, full duplex
+Using TSEC0 device
+TFTP from server 192.168.1.1; our IP address is 192.168.1.101
+Filename 'oftrees/mpc8540ads.dtb'.
+Load address: 0x300000
+Loading: #
+done
+Bytes transferred = 4106 (100a hex)
+=> tftp $loadaddr $bootfile
+Speed: 1000, full duplex
+Using TSEC0 device
+TFTP from server 192.168.1.1; our IP address is 192.168.1.2
+Filename 'uImage'.
+Load address: 0x200000
+Loading:############
+done
+Bytes transferred = 1029407 (fb51f hex)
+=> print loadaddr
+loadaddr=200000
+=> print oftaddr
+oftaddr=0x300000
+=> bootm $loadaddr - $oftaddr
+## Booting image at 00200000 ...
+ Image Name: Linux-2.6.17-dirty
+ Image Type: PowerPC Linux Kernel Image (gzip compressed)
+ Data Size: 1029343 Bytes = 1005.2 kB
+ Load Address: 00000000
+ Entry Point: 00000000
+ Verifying Checksum ... OK
+ Uncompressing Kernel Image ... OK
+Booting using flat device tree at 0x300000
+Using MPC85xx ADS machine description
+Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb
+[snip]
+
+
More About U-Boot Image Types:
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