apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

[S390] cio/ipl: Clean interface between cio and ipl code.

Browse Source 
Clean interface between cio and ipl code, so Peter stops complaining.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens
2007-04-27 16:01:25 +02:00
committed by Martin Schwidefsky
parent 29c380f5f0
commit 6fc321fd7d
4 changed files with 40 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/s390/cio/cio.c
+10 -28
View File
@@ -1048,37 +1048,19 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
do_reipl_asm(*((__u32*)&schid));
}
static struct schib __initdata ipl_schib;
/*
* ipl_save_parameters gets called very early. It is not allowed to access
* anything in the bss section at all. The bss section is not cleared yet,
* but may contain some ipl parameters written by the firmware.
* These parameters (if present) are copied to 0x2000.
* To avoid corruption of the ipl parameters, all variables used by this
* function must reside on the stack or in the data section.
*/
void ipl_save_parameters(void)
int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
{
struct subchannel_id schid;
unsigned int *ipl_ptr;
void *src, *dst;
struct schib schib;
schid = *(struct subchannel_id *)__LC_SUBCHANNEL_ID;
if (!schid.one)
return;
if (stsch(schid, &ipl_schib))
return;
if (!ipl_schib.pmcw.dnv)
return;
ipl_devno = ipl_schib.pmcw.dev;
ipl_flags |= IPL_DEVNO_VALID;
if (!ipl_schib.pmcw.qf)
return;
ipl_flags |= IPL_PARMBLOCK_VALID;
ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
src = (void *)(unsigned long)*ipl_ptr;
dst = (void *)IPL_PARMBLOCK_ORIGIN;
memmove(dst, src, PAGE_SIZE);
*ipl_ptr = IPL_PARMBLOCK_ORIGIN;
return -ENODEV;
if (stsch(schid, &schib))
return -ENODEV;
if (!schib.pmcw.dnv)
return -ENODEV;
iplinfo->devno = schib.pmcw.dev;
iplinfo->is_qdio = schib.pmcw.qf;
return 0;
}