Commit Graph

12 Commits

Author SHA1 Message Date
Christian Borntraeger
f2879a5c9e pc-bios/s390-ccw: store proper subsystem information word
POP chapter 17 requires to store a subsystem information word at 184
during IPL. Furthermore bytes 188-191 should be zero. The bootmap might
contain data blocks that are written to the first page. We have to
write these values after we processed the bootmap and before the final
IPL.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-07-08 15:08:03 +02:00
Eugene (jno) Dvurechenski
564e52b96f pc-bios/s390-ccw: IPL from LDL/CMS-formatted ECKD DASD
Add code that allows us to start from two further ECKD DASD disk
layouts: LDL (Linux disk layout) and CMS (cms-formatted disk).

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:52 +02:00
Eugene (jno) Dvurechenski
e0aff4aa3f pc-bios/s390-ccw: IPL from CDL-formatted ECKD DASD
Add code that allows us to start from ECKD DASD using the z/OS
compatible disk layout (CDL), which is the most common format for ECKD
DASD.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:52 +02:00
Eugene (jno) Dvurechenski
a00b33d9e2 pc-bios/s390-ccw: factor out ipl code
Move the scsi-disk specific ipl code from zipl_load() into a new
function ipl_scsi(). This makes it easier to add ipl routines for other
disk types.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:49 +02:00
Eugene (jno) Dvurechenski
60612d5cbb pc-bios/s390-ccw: Unify error handling
Convert to IPL_assert and friends

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:28 +02:00
Eugene (jno) Dvurechenski
a94b485e17 pc-bios/s390-ccw: add some utility code
IPL_assert(term,message) is introduced to handle error conditions.
ebcdic_to_ascii() to convert chars (mostly to print VOLSERs).
read_block() provision for unified block-number handling.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:28 +02:00
Eugene (jno) Dvurechenski
91a03f9b69 pc-bios/s390-ccw: handle different sector sizes
Use the virtio device's configuration to figure out the disk geometry
and use a sector size based upon the layout.

[CH: s/SECTOR_SIZE/MAX_SECTOR_SIZE/g]
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:03 +02:00
Eugene (jno) Dvurechenski
26f2bbd6b1 pc-bios/s390-ccw: cleanup and enhance bootmap defintions
Add declarations to describe structure of different dasd IPL sources
(eckd and fba). Move the structure definitions to a new header bootmap.h.
While we are at it, change structs to typedefs.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 11:58:47 +02:00
Eugene (jno) Dvurechenski
abd696e4f7 pc-bios/s390-ccw: make checkpatch happy
Remove tabs, tweak whitespace and comments.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 11:57:25 +02:00
Eugene (jno) Dvurechenski
c77cd87cf5 pc-bios/s390-ccw: fix for fragmented SCSI bootmap
We need to interpret the last entry of the bootmap with zero
block count as "continuation pointer".
The "last entry" is being detected by pre-filling of the scratch
space with known values and respective look-ahead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-23 14:03:31 +02:00
Christian Borntraeger
9629823290 pc-bios/s390-ccw: do a subsystem reset before running the guest
The loader BIOS has already activated several devices. Let's do a
subsystem reset before jumping into the guest. As there is no direct
way of doing so, we use diagnose 308 to bring the system in a
defined state. This is similar to what kdump on s390 uses. We have
to define a small trampoline function that restores the low bytes
to whatever the bootmap has written there.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-23 14:03:31 +02:00
Alexander Graf
685d49a63e S390: ccw firmware: Add bootmap interpreter
On s390, there is an architected boot map format that we can read to
boot a certain entry off the disk. Implement a simple reader for this
that always boots the first (default) entry.

Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26 20:18:24 +02:00