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authorSimon Glass <sjg@chromium.org>2016-07-17 01:22:41 -0600
committerBin Meng <bmeng.cn@gmail.com>2016-08-16 11:44:09 +0800
commitdc396210d9f5db485336513a824c5721db9f3ff8 (patch)
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parent5d98c5ec8e4faeac39befce97498bb0631fa7f3a (diff)
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x86: Mention how to boot a 64-bit kernel from U-Boot
The README indicates that this is not supported, but this is no-longer true. Update the text to indicate this and describe the FIT changes required. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc/uImage.FIT/kernel.its')
-rw-r--r--doc/uImage.FIT/kernel.its4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/uImage.FIT/kernel.its b/doc/uImage.FIT/kernel.its
index e668c3f..0aaf47e 100644
--- a/doc/uImage.FIT/kernel.its
+++ b/doc/uImage.FIT/kernel.its
@@ -85,3 +85,7 @@ For x86 a setup node is also required: see x86-fit-boot.txt.
};
};
};
+
+Note: the above assumes a 32-bit kernel. To directly boot a 64-bit kernel,
+change both arch values to "x86_64". U-Boot will then change to 64-bit mode
+before booting the kernel (see boot_linux_kernel()).