diff options
| author | Alexander Yarygin <yarygin@linux.vnet.ibm.com> | 2015-07-31 17:04:51 +0300 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2016-05-17 15:50:29 +0200 |
| commit | d046c51dad3bda03e4c012c83411842b92271542 (patch) | |
| tree | 1e23abd83114274998f2dc6f3cad2c9127cbf822 /pc-bios/s390-ccw/start.S | |
| parent | 3041e3bead8df443e5212ae8a608cbec81bc90bd (diff) | |
pc-bios/s390-ccw: Get device address via diag 308/6
To IPL from a device, pc-bios receives from qemu a device address via
general register 7. The better way to do it is to use diag308/6
instruction which returns so called
"IplParameterBlock". IplParameterBlock contains the device address for
IPL and additional parameters that can be used by pc-bios.
This patch allows pc-bios to get device address via diag308/6 and
doesn't use gr7 passed boot information anymore.
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'pc-bios/s390-ccw/start.S')
| -rw-r--r-- | pc-bios/s390-ccw/start.S | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S index b6dd8c2fbe..43f9bd243e 100644 --- a/pc-bios/s390-ccw/start.S +++ b/pc-bios/s390-ccw/start.S @@ -14,8 +14,6 @@ _start: larl %r15, stack + 0x8000 /* Set up stack */ -larl %r6, boot_value -stg %r7, 0(%r6) /* save the boot_value before any function calls */ j main /* And call C */ /* |