changeset 6234ea863e76 in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=6234ea863e76
description:
arm: armv8 boot options to enable v8
Modifies FSConfig.py to enable ARMv8 compatibility.
To boot gem5 with ARMv8:
Download the v8 kernel, .dtb file, and root FS from:
http://gem5.org/Download
Download the ARMv8 toolchain, and add the bin dir to your path:
http://www.linaro.org/engineering/engineering-projects/armv8
Build gem5 for ARM
Build the v8 bootloader (in gem5/system/arm/aarch64_bootloader)
Make script in gem5/system/arm/aarch64_bootloader will require v8
toolchain,
drop the produced boot_emm.arm64 in $(M5_PATH)/binaries/
Run:
$ build/ARM/gem5.fast configs/example/fs.py
--machine-type=VExpress_EMM64 \
--kernel=/path/to/kernel/vmlinux-linaro-tracking \
--dtb-filename=/path/to/dtb/rtsm_ve-aemv8a.dtb \
--disk-image=/path/to/img/linaro-minimal-armv8.img
diffstat:
configs/common/FSConfig.py | 18 ++++++++++++------
1 files changed, 12 insertions(+), 6 deletions(-)
diffs (35 lines):
diff -r 83957204d43b -r 6234ea863e76 configs/common/FSConfig.py
--- a/configs/common/FSConfig.py Tue Feb 18 05:51:01 2014 -0500
+++ b/configs/common/FSConfig.py Tue Feb 18 17:20:56 2014 -0500
@@ -251,10 +251,13 @@
self.cf0 = CowIdeDisk(driveID='master')
self.cf0.childImage(mdesc.disk())
# default to an IDE controller rather than a CF one
- # assuming we've got one
- try:
- self.realview.ide.disks = [self.cf0]
- except:
+ # assuming we've got one; EMM64 is an exception for the moment
+ if machine_type != "VExpress_EMM64":
+ try:
+ self.realview.ide.disks = [self.cf0]
+ except:
+ self.realview.cf_ctrl.disks = [self.cf0]
+ else:
self.realview.cf_ctrl.disks = [self.cf0]
if bare_metal:
@@ -273,8 +276,11 @@
print " another platform"
sys.exit(1)
- boot_flags = 'earlyprintk console=ttyAMA0 lpj=19988480 norandmaps ' + \
- 'rw loglevel=8 mem=%s root=/dev/sda1' % mdesc.mem()
+ # Ensure that writes to the UART actually go out early in the boot
+ boot_flags = 'earlyprintk=pl011,0x1c090000 console=ttyAMA0 ' + \
+ 'lpj=19988480 norandmaps rw loglevel=8 ' + \
+ 'mem=%s root=/dev/sda1' % mdesc.mem()
+
self.mem_ranges = [AddrRange(self.realview.mem_start_addr,
size = mdesc.mem())]
self.realview.setupBootLoader(self.membus, self, binary)
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