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fix(boot): Enable serial console when booting via syslinux.

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Useful for qemu -nographic or any any other situation where serial is
easier to get at than VGA. It may be possible that in some setups ttyS0
isn't appropriate but we can figure out a way to customize kernel
options if/when that ever comes up.
This commit is contained in:
Michael Marineau 2013-08-16 15:09:26 -04:00
parent c21b8ee03d
commit 81afa4f300
1 changed files with 8 additions and 3 deletions
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11
build_library/create_legacy_bootloader_templates.sh
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@ -97,7 +97,12 @@ EOF
SYSLINUX_DIR="${FLAGS_to}/syslinux"
sudo mkdir -p "${SYSLINUX_DIR}"
# Add ttyS0 as a secondary console, useful for qemu -nographic
# This leaves /dev/console mapped to tty0 (vga) which is reasonable default.
syslinux_args="console=ttyS0,115200n8 ${common_args}"
cat <<EOF | sudo dd of="${SYSLINUX_DIR}/syslinux.cfg" 2>/dev/null
SERIAL 0 115200
PROMPT 0
TIMEOUT 0
DEFAULT boot_kernel
@ -119,14 +124,14 @@ EOF
label boot_kernel
menu label boot_kernel
kernel vmlinuz-boot_kernel
append ${common_args} root=gptprio:
append ${syslinux_args} root=gptprio:
EOF
info "Emitted ${SYSLINUX_DIR}/boot_kernel.cfg"
cat <<EOF | sudo dd of="${SYSLINUX_DIR}/root.A.cfg" 2>/dev/null
label coreos.A
menu label coreos.A
kernel vmlinuz.A
append ${common_args} root=${ROOTA}
append ${syslinux_args} root=${ROOTA}
EOF
info "Emitted ${SYSLINUX_DIR}/root.A.cfg"
@ -134,7 +139,7 @@ EOF
label coreos.B
menu label coreos.B
kernel vmlinuz.B
append ${common_args} root=${ROOTB}
append ${syslinux_args} root=${ROOTB}
EOF
info "Emitted ${SYSLINUX_DIR}/root.B.cfg"