diff options
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/bootwrapper.rst | 28 |
1 files changed, 2 insertions, 26 deletions
diff --git a/Documentation/powerpc/bootwrapper.rst b/Documentation/powerpc/bootwrapper.rst index a6292afba573..cdfa2bc8425f 100644 --- a/Documentation/powerpc/bootwrapper.rst +++ b/Documentation/powerpc/bootwrapper.rst @@ -70,28 +70,6 @@ Currently, the following image format targets exist: kernel with this image type and it depends entirely on the embedded device tree for all information. - The simpleImage is useful for booting systems with - an unknown firmware interface or for booting from - a debugger when no firmware is present (such as on - the Xilinx Virtex platform). The only assumption that - simpleImage makes is that RAM is correctly initialized - and that the MMU is either off or has RAM mapped to - base address 0. - - simpleImage also supports inserting special platform - specific initialization code to the start of the bootup - sequence. The virtex405 platform uses this feature to - ensure that the cache is invalidated before caching - is enabled. Platform specific initialization code is - added as part of the wrapper script and is keyed on - the image target name. For example, all - simpleImage.virtex405-* targets will add the - virtex405-head.S initialization code (This also means - that the dts file for virtex405 targets should be - named (virtex405-<board>.dts). Search the wrapper - script for 'virtex405' and see the file - arch/powerpc/boot/virtex405-head.S for details. - treeImage.%; Image format for used with OpenBIOS firmware found on some ppc4xx hardware. This image embeds a device tree blob inside the image. @@ -116,10 +94,8 @@ Image types which embed a device tree blob (simpleImage, dtbImage, treeImage, and cuImage) all generate the device tree blob from a file in the arch/powerpc/boot/dts/ directory. The Makefile selects the correct device tree source based on the name of the target. Therefore, if the kernel is -built with 'make treeImage.walnut simpleImage.virtex405-ml403', then the -build system will use arch/powerpc/boot/dts/walnut.dts to build -treeImage.walnut and arch/powerpc/boot/dts/virtex405-ml403.dts to build -the simpleImage.virtex405-ml403. +built with 'make treeImage.walnut', then the build system will use +arch/powerpc/boot/dts/walnut.dts to build treeImage.walnut. Two special targets called 'zImage' and 'zImage.initrd' also exist. These targets build all the default images as selected by the kernel configuration. |