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Append vmalloc arg for ARM in build_kernel_image

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Tegra2 systems require a minimum vmalloc bootarg to successfully
reserve the graphics carveout memory. If the vmalloc is insufficient
a crash can result prior to any serial output reported. The minimum
vmalloc is >= carveout size + framebuffer - 32MB, thus for a 256MB
graphics carveout (with 10MB framebuffer), vmalloc>=234MB. This
arg is not added in the u-boot configs to avoid tightly coupling
the u-boot and kernel and is discussed in greater depth at
http://gerrit.chromium.org/gerrit/#change,8293.

BUG=chrome-os-partner:5197,chrome-os-partner:5902
TEST=Manually observe /proc/cmdline reflects change

Change-Id: I66b35b266c7542771f2d4fc497dd4429587529f8
Reviewed-on: http://gerrit.chromium.org/gerrit/8373
Commit-Ready: Katie Roberts-Hoffman <katierh@chromium.org>
Reviewed-by: Katie Roberts-Hoffman <katierh@chromium.org>
Tested-by: Katie Roberts-Hoffman <katierh@chromium.org>
This commit is contained in:
Katie Roberts-Hoffman 2011-09-27 13:34:59 -07:00 committed by Gerrit
parent d1c012e718
commit 8429b4eb07
1 changed files with 1 additions and 0 deletions
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build_kernel_image.sh
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@ -179,6 +179,7 @@ elif [[ "${FLAGS_arch}" = "arm" ]]; then
> "${FLAGS_working_dir}/config.txt"
earlyprintk
kern_guid=%U
vmalloc=234MB
EOF
WORK="${WORK} ${FLAGS_working_dir}/config.txt"