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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-04-27 10:01:25 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 10:01:38 -0400
commit6fc321fd7dd91f0592f37503219196835314fbb7 (patch)
treed512811f8f6761608829c8df44a55a2ada074cdc /drivers/s390/cio/cio.c
parent29c380f5f06d0c5a320b9bb6f8987065e7b81c91 (diff)
[S390] cio/ipl: Clean interface between cio and ipl code.
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>
Diffstat (limited to 'drivers/s390/cio/cio.c')
-rw-r--r--drivers/s390/cio/cio.c38
1 files changed, 10 insertions, 28 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 9cb129ab5be5..21af446c1f2d 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -1048,37 +1048,19 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
1048 do_reipl_asm(*((__u32*)&schid)); 1048 do_reipl_asm(*((__u32*)&schid));
1049} 1049}
1050 1050
1051static struct schib __initdata ipl_schib; 1051int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
1052
1053/*
1054 * ipl_save_parameters gets called very early. It is not allowed to access
1055 * anything in the bss section at all. The bss section is not cleared yet,
1056 * but may contain some ipl parameters written by the firmware.
1057 * These parameters (if present) are copied to 0x2000.
1058 * To avoid corruption of the ipl parameters, all variables used by this
1059 * function must reside on the stack or in the data section.
1060 */
1061void ipl_save_parameters(void)
1062{ 1052{
1063 struct subchannel_id schid; 1053 struct subchannel_id schid;
1064 unsigned int *ipl_ptr; 1054 struct schib schib;
1065 void *src, *dst;
1066 1055
1067 schid = *(struct subchannel_id *)__LC_SUBCHANNEL_ID; 1056 schid = *(struct subchannel_id *)__LC_SUBCHANNEL_ID;
1068 if (!schid.one) 1057 if (!schid.one)
1069 return; 1058 return -ENODEV;
1070 if (stsch(schid, &ipl_schib)) 1059 if (stsch(schid, &schib))
1071 return; 1060 return -ENODEV;
1072 if (!ipl_schib.pmcw.dnv) 1061 if (!schib.pmcw.dnv)
1073 return; 1062 return -ENODEV;
1074 ipl_devno = ipl_schib.pmcw.dev; 1063 iplinfo->devno = schib.pmcw.dev;
1075 ipl_flags |= IPL_DEVNO_VALID; 1064 iplinfo->is_qdio = schib.pmcw.qf;
1076 if (!ipl_schib.pmcw.qf) 1065 return 0;
1077 return;
1078 ipl_flags |= IPL_PARMBLOCK_VALID;
1079 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1080 src = (void *)(unsigned long)*ipl_ptr;
1081 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1082 memmove(dst, src, PAGE_SIZE);
1083 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1084} 1066}