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Fake the GPT once for ARM to determine parameters for U-Boot script

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Review URL: http://codereview.chromium.org/1520007
This commit is contained in:
Bill Richardson 2010-03-30 15:52:09 -07:00
parent 4364a2e679
commit 3534a08218
1 changed files with 9 additions and 3 deletions
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12
build_gpt.sh
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@ -4,7 +4,6 @@
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Load common constants. This should be the first executable line.
# The path to common.sh should be relative to your script's location.
. "$(dirname "$0")/common.sh"
@ -103,9 +102,16 @@ fi
# We'll need some code to put in the PMBR, for booting on legacy BIOS. Some ARM
# systems will use a U-Boot script temporarily, but it goes in the same place.
if [[ "$ARCH" = "arm" ]]; then
# U-Boot script copies the kernel into memory, then boots it.
# We need to know the location and size of the kernel so we can create the
# U-Boot script to point to it. Let's create one fake GPT first which will
# set the appropriate environment variables. Then we can create the correct
# script and install it for real. A bit awkward, but this is only temporary.
echo "Installing fake GPT first, to calculate locations..."
install_gpt $OUTDEV $ROOTFS_IMG $KERNEL_IMG $STATEFUL_IMG /dev/zero
# Create the U-Boot script to copy the kernel into memory and boot it.
KERNEL_OFFSET=$(printf "0x%08x" ${START_KERN_A})
KERNEL_SECS_HEX=$(printf "0x%08x" ${NUM_KERN_BLOCKS})
KERNEL_SECS_HEX=$(printf "0x%08x" ${NUM_KERN_SECTORS})
MBR_SCRIPT="${IMAGEDIR}/mbr_script"
echo -e "echo\necho ---- ChromeOS Boot ----\necho\n" \
"mmc read 1 C0008000 $KERNEL_OFFSET $KERNEL_SECS_HEX\n" \