While booting a 64bit kernel, there is a small timeframe where OF and the kernel communicate with each other. Within that timeframe, DSI/ISI interrupts may occur, because some memory is not mapped yet.
Right now in case that happens, we jump into the DSI/ISI interrupt handler which clobbers the high 32 bits of the kernel's registers. In order to circumvent that, let's save/restore all 64 bits of all kernel registers when we get a DSI/ISI interrupt.
This patch enables a PPC64 Linux kernel to boot up to the point where it tries to set up the SLB entries (slbmte), which is not yet implemented in qemu.
v2 implements handling for the HIOR register, bringing interrupt handlers to RAM.
Signed-off-by: Alexander Graf <alex@csgraf.de>
git-svn-id: svn://coreboot.org/openbios/openbios-devel@462 f158a5a8-5612-0410-a976-696ce0be7e32
It gets up to the boot prompt and works rather good so far, though I haven't been able to run a kernel yet.
For more recent PowerPC CPUs the PTE layout has changed, so we need to take that into account and create PTEs according to the new layout and at the new physical positions.
Signed-off-by: Alexander Graf <alex@csgraf.de>
Signed-off-by: Laurent Vivier <Laurent@vivier.eu>
git-svn-id: svn://coreboot.org/openbios/openbios-devel@461 f158a5a8-5612-0410-a976-696ce0be7e32
It is needed to boot Fedora-10 as we must specify the path to the yaboot.conf.
To boot Fedora:
boot cd: conf=cd:,\ppc\ppc32\yaboot.conf
so "bootpath" is "cd:", and "bootargs" is "conf=cd:,\ppc\ppc32\yaboot.conf"
git-svn-id: svn://coreboot.org/openbios/openbios-devel@456 f158a5a8-5612-0410-a976-696ce0be7e32
on the full disk. We accept partition number 0 (which identifies the full
disk) and partition number 1 (we can see the disk as only one partition).
This is needed to boot openSUSE install CD which uses
"&device;:1,\suseboot\yaboot.ibm" as its boot path.
There is a Mac partition map on the CD, but
partition 1 is the partition map itself, and thus is not usable by a filesystem.
So we can guess, openFirmware must use ISO9660 instead of HFS and thus
to not use the Mac partition map, but the whole CD for the partition #1.
Disk openSUSE-ppc.iso: 135 MB, 135593984 bytes
4 heads, 32 sectors/track, 2069 cylinders
Units = cylinders of 128 * 512 = 65536 bytes
Device Boot Start End Blocks Id System
openSUSE-ppc.iso1 1 1 48 Apple_partition_map
openSUSE-ppc.iso2 1 2066 132160 Apple_HFS
git-svn-id: svn://coreboot.org/openbios/openbios-devel@443 f158a5a8-5612-0410-a976-696ce0be7e32
To keep compatibility with yaboot (tested with debian install CD),
put in bootpath a fully qualified path (<device>:<partition>,<filename>)
git-svn-id: svn://coreboot.org/openbios/openbios-devel@442 f158a5a8-5612-0410-a976-696ce0be7e32
and pciids.sourceforge.net.
Also fix a confusion between Sabre and Simba device IDs.
git-svn-id: svn://coreboot.org/openbios/openbios-devel@437 f158a5a8-5612-0410-a976-696ce0be7e32
This patch checks wether fs->vol_name exists and handles the
case where it doesn't exist. That fixes the lockup that occurs
when trying to run qemu-system-ppc -cdrom <iso> -boot d
Signed-off-by: Stefan Assmann <sassmann@suse.de>
git-svn-id: svn://coreboot.org/openbios/openbios-devel@430 f158a5a8-5612-0410-a976-696ce0be7e32
<boot-script>boot &device;:1,\suseboot\yaboot.ibm</boot-script>.
This would evaluate to boot cd:0,1\suseboot\yaboot.ibm which results
in a file not found error (seen on many openSUSE ppc media).
With this patch the above will evaluate to boot cd:0,\suseboot\yaboot.ibm
and yaboot will load.
Signed-off-by: Stefan Assmann <sassmann@suse.de>
git-svn-id: svn://coreboot.org/openbios/openbios-devel@429 f158a5a8-5612-0410-a976-696ce0be7e32
