[OE-core] [oe-core] QEMU with ARM Cortex A9 with hard float configuration - Kernel panic
Elvis Dowson
elvis.dowson at gmail.com
Mon Aug 26 19:35:35 UTC 2013
Hi Bruce,
On Aug 26, 2013, at 11:08 PM, Bruce Ashfield <bruce.ashfield at windriver.com> wrote:
> Are you interested in something from scratch, versus something that
> isn't already partially in the tree (like qemuarma9) ?
>
> We've got a few docs and tutorials, but I can also help step you through
> the process to assist the existing material.
I'd like to adapt the existing linux-yocto standard/base branch, and build up on existing qemuarma9 support. I've included detailed patch fragments below, so that you can replicate the current state of my work at your end.
I've performed the following steps till date, but unfortunately get a qemu ram / rom out of memory address error after doing all this. Must be because of an incorrectly mapped KMACHINE. The vexpress device doesn't support PCI, IDE or SCSI, only microsd card or ram devices, so the boot method should use an initrd file, for the root filesystem, as described here.
https://wiki.linaro.org/PeterMaydell/QemuVersatileExpress
Step 01.00: Clone linux-yocto-3.8 locally, create local meta branch, create local standard/qemuarma9 branch, tracking the master branch.
Make the following modification to the qemuarma9-standard.scc file.
From 8e9b465f242941b70d7b61045c073e82700fcd91 Mon Sep 17 00:00:00 2001
From: Elvis Dowson <elvis.dowson at gmail.com>
Date: Mon, 26 Aug 2013 22:18:24 +0400
Subject: [PATCH] qemuarma9: Update branch to qemuarma9.
Signed-off-by: Elvis Dowson <elvis.dowson at gmail.com>
---
meta/cfg/kernel-cache/bsp/qemuarma9/qemuarma9-standard.scc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/meta/cfg/kernel-cache/bsp/qemuarma9/qemuarma9-standard.scc b/meta/cfg/kernel-cache/bsp/qemuarma9/qemuarma9-standard.scc
index c71fe1c..729125d 100644
--- a/meta/cfg/kernel-cache/bsp/qemuarma9/qemuarma9-standard.scc
+++ b/meta/cfg/kernel-cache/bsp/qemuarma9/qemuarma9-standard.scc
@@ -3,7 +3,7 @@ define KTYPE standard
define KARCH arm
include ktypes/standard/standard.scc
-branch arm-versatile-926ejs
+branch qemuarma9
include qemuarma9.scc
--
1.7.10.4
Step 02.00: Create a new qemuarma9.conf machine definition.
There is a dts file in arch/arm/boot/dts called vexpress-v2p-ca9.dts.
Q01: I guess the KMACHINE_qemuarma9 should be set to "vex press" ? instead of qemuarma9 below?
#@TYPE: Machine
#@NAME: qemuarma9
#@DESCRIPTION: Machine configuration for QEMU ARM Cortex A9.
# Specify the default tune.
DEFAULTTUNE = "armv7a-neon"
require conf/machine/include/qemu.inc
require conf/machine/include/tune-cortexa9.inc
# Specify the preferred kernel recipe version.
PREFERRED_VERSION_linux-yocto ?= "3.8%"
# Specify the machine name used by the kernel.
KMACHINE_qemuarma9 = "qemuarma9" # Error?!!
# Specify the kernel image type.
KERNEL_IMAGETYPE = "uImage"
MACHINE_DEVICETREE := "qemuarma9.dts"
# Specify the serial console parameters.
SERIAL_CONSOLE = "115200 ttyAMA0"
Step 03.00: Patch the oe-core sources.
Step 03.01: Patch scripts/runqemu
@@ -37,10 +37,11 @@ usage() {
echo " qemuparams=\"xyz\" - specify custom parameters to QEMU"
echo " bootparams=\"xyz\" - specify custom kernel parameters during boot"
echo ""
echo "Examples:"
echo " $MYNAME qemuarm"
+ echo " $MYNAME qemuarma9 ramfs"
echo " $MYNAME qemux86-64 core-image-sato ext3"
echo " $MYNAME path/to/bzImage-qemux86.bin path/to/nfsrootdir/ serial"
echo " $MYNAME qemux86 ramfs"
echo " $MYNAME qemux86 iso"
echo " $MYNAME qemux86 qemuparams=\"-m 256\""
@@ -105,11 +106,11 @@ process_filename() {
# bit more complex, but offers a great user experience.
KVM_ENABLED="no"
while true; do
arg=${1}
case "$arg" in
- "qemux86" | "qemux86-64" | "qemuarm" | "qemumips" | "qemumipsel" | \
+ "qemux86" | "qemux86-64" | "qemuarm" | "qemuarma9" |"qemumips" | "qemumipsel" | \
"qemumips64" | "qemush4" | "qemuppc" | "qemumicroblaze" | "qemuzynq")
[ -z "$MACHINE" ] && MACHINE=$arg || \
error "conflicting MACHINE types [$MACHINE] and [$arg]"
;;
"ext2" | "ext3" | "ext4" | "jffs2" | "nfs" | "btrfs")
@@ -222,17 +223,17 @@ if [ "$FSTYPE" = "nfs" -a -z "$ROOTFS" ]; then
error "NFS booting without an explicit ROOTFS path is not yet supported"
fi
if [ -z "$MACHINE" ]; then
if [ "x$FSTYPE" = "xvmdk" ]; then
- MACHINE=`basename $VM | sed 's/.*\(qemux86-64\|qemux86\|qemuarm\|qemumips64\|qemumips\|qemuppc\|qemush4\).*/\1/'`
+ MACHINE=`basename $VM | sed 's/.*\(qemux86-64\|qemux86\|qemuarm\|qemuarma9\|qemumips64\|qemumips\|qemuppc\|qemush4\).*/\1/'`
if [ -z "$MACHINE" ]; then
error "Unable to set MACHINE from vmdk filename [$VM]"
fi
echo "Set MACHINE to [$MACHINE] based on vmdk [$VM]"
else
- MACHINE=`basename $KERNEL | sed 's/.*\(qemux86-64\|qemux86\|qemuarm\|qemumips64\|qemumips\|qemuppc\|qemush4\).*/\1/'`
+ MACHINE=`basename $KERNEL | sed 's/.*\(qemux86-64\|qemux86\|qemuarm\|qemuarma9\|qemumips64\|qemumips\|qemuppc\|qemush4\).*/\1/'`
if [ -z "$MACHINE" ]; then
error "Unable to set MACHINE from kernel filename [$KERNEL]"
fi
echo "Set MACHINE to [$MACHINE] based on kernel [$KERNEL]"
fi
@@ -292,10 +293,13 @@ QEMUX86_64_DEFAULT_KERNEL=bzImage-qemux86-64.bin
QEMUX86_64_DEFAULT_FSTYPE=ext3
QEMUARM_DEFAULT_KERNEL=zImage-qemuarm.bin
QEMUARM_DEFAULT_FSTYPE=ext3
+QEMUARMA9_DEFAULT_KERNEL=uImage
+QEMUARMA9_DEFAULT_FSTYPE=cpio.gz
+
QEMUMIPS_DEFAULT_KERNEL=vmlinux-qemumips.bin
QEMUMIPS_DEFAULT_FSTYPE=ext3
QEMUMIPSEL_DEFAULT_KERNEL=vmlinux-qemumipsel.bin
QEMUMIPSEL_DEFAULT_FSTYPE=ext3
Step 03.02: Patch runqemu-internal.
@@ -48,10 +48,13 @@ else
mem_size=128
;;
"qemuarm")
mem_size=128
;;
+ "qemuarma9")
+ mem_size=128
+ ;;
"qemumicroblaze")
mem_size=64
;;
"qemumips"|"qemumips64")
mem_size=128
@@ -265,10 +268,11 @@ else
fi
fi
case "$MACHINE" in
"qemuarm") ;;
+ "qemuarma9") ;;
"qemumicroblaze") ;;
"qemumips") ;;
"qemumipsel") ;;
"qemumips64") ;;
"qemush4") ;;
@@ -348,10 +352,39 @@ if [ "$MACHINE" = "qemuarm" -o "$MACHINE" = "qemuarmv6" -o "$MACHINE" = "qemuarm
QEMUOPTIONS="$QEMUOPTIONS -cpu arm1136"
fi
if [ "$MACHINE" = "qemuarmv7" ]; then
QEMUOPTIONS="$QEMUOPTIONS -cpu cortex-a8"
fi
+ if [ "$MACHINE" = "qemuarma9" ]; then
+ MACHINE_SUBTYPE=vexpress-a9
+ QEMUOPTIONS="$QEMUOPTIONS -cpu cortex-a9"
+ fi
+fi
+
+if [ "$MACHINE" = "qemuarma9" ]; then
+ QEMU=qemu-system-arm
+ MACHINE_SUBTYPE=vexpress-a9
+ QEMUOPTIONS="$QEMUOPTIONS -cpu cortex-a9"
+ export QEMU_AUDIO_DRV="none"
+ QEMU_UI_OPTIONS="-show-cursor -usb"
+ # QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS -force-pointer"
+ #QEMU_SYSTEM_OPTIONS="-M $MACHINE_SUBTYPE -serial null -serial mon:stdio -dtb $KERNEL-$MACHINE.dtb"
+ if [ "${FSTYPE:0:3}" = "ext" -o "${FSTYPE:0:4}" = "cpio" ]; then
+ KERNCMDLINE="earlyprintk root=/dev/mmcblk0p2 rw console=ttyAMA0,115200 console=tty $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY highres=off -dtb $KERNEL-$MACHINE.dtb"
+ QEMUOPTIONS="-M ${MACHINE_SUBTYPE} -initrd $ROOTFS -no-reboot $QEMU_UI_OPTIONS"
+ #QEMUOPTIONS="$QEMU_NETWORK_CMD -M ${MACHINE_SUBTYPE} -hda $ROOTFS -no-reboot $QEMU_UI_OPTIONS"
+ fi
+
+ if [ "$FSTYPE" = "nfs" ]; then
+ if [ "$NFS_SERVER" = "192.168.7.1" -a ! -d "$NFS_DIR" ]; then
+ echo "Error: NFS mount point $ROOTFS doesn't exist"
+ cleanup
+ return 1
+ fi
+ KERNCMDLINE="root=/dev/nfs nfsroot=$NFS_SERVER:$NFS_DIR,$UNFS_OPTS rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
+ QEMUOPTIONS="$QEMU_NETWORK_CMD -M ${MACHINE_SUBTYPE} --no-reboot $QEMU_UI_OPTIONS"
+ fi
fi
if [ "$MACHINE" = "qemux86" ]; then
QEMU=qemu-system-i386
QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS -vga vmware"
@@ -520,11 +553,11 @@ if [ "$MACHINE" = "qemuzynq" ]; then
fi
fi
if [ "x$RAMFS" = "xtrue" ]; then
QEMUOPTIONS="-initrd $ROOTFS -nographic"
- KERNCMDLINE="root=/dev/ram0 debugshell"
+ KERNCMDLINE="earlyprintk root=/dev/mmcblk0p2 debugshell"
fi
if [ "x$ISOFS" = "xtrue" ]; then
QEMUOPTIONS="$QEMU_NETWORK_CMD -cdrom $ROOTFS $QEMU_UI_OPTIONS"
fi
Best regards,
Elvis Dowson
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