[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>

1 files changed, 10 insertions, 28 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 9cb129ab5be..21af446c1f2 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)
 	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;
 }