[S390] Convert memory detection into C code.

Hopefully this will make it more maintainable and less error prone.
Code makes use of search_exception_tables(). Since it calls this
function before the kernel exeception table is sorted, there is an
early call to sort_main_extable().

This way it's easy to use the already present infrastructure of fixup
sections. Also this would allows to easily convert the rest of
head[31|64].S into C code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 7 insertions, 11 deletions

diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 2c71d6ee7b5b..7d29ab45a6ed 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -12,7 +12,7 @@
 
 #include <linux/types.h>
 #include <linux/list.h>
-
+#include <asm/sclp.h>
 #include <asm/ebcdic.h>
 
 /* maximum number of pages concerning our own memory management */
@@ -49,9 +49,11 @@
 
 typedef unsigned int sclp_cmdw_t;
 
-#define SCLP_CMDW_READDATA      0x00770005
-#define SCLP_CMDW_WRITEDATA     0x00760005
-#define SCLP_CMDW_WRITEMASK     0x00780005
+#define SCLP_CMDW_READ_EVENT_DATA       0x00770005
+#define SCLP_CMDW_WRITE_EVENT_DATA      0x00760005
+#define SCLP_CMDW_WRITE_EVENT_MASK      0x00780005
+#define SCLP_CMDW_READ_SCP_INFO         0x00020001
+#define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
 
 #define GDS_ID_MDSMU            0x1310
 #define GDS_ID_MDSRouteInfo     0x1311
@@ -66,13 +68,6 @@ typedef unsigned int sclp_cmdw_t;
 
 typedef u32 sccb_mask_t;        /* ATTENTION: assumes 32bit mask !!! */
 
-struct sccb_header {
-        u16     length;
-        u8      function_code;
-        u8      control_mask[3];
-        u16     response_code;
-} __attribute__((packed));
-
 struct gds_subvector {
         u8      length;
         u8      key;
@@ -131,6 +126,7 @@ void sclp_unregister(struct sclp_register *reg);
 int sclp_remove_processed(struct sccb_header *sccb);
 int sclp_deactivate(void);
 int sclp_reactivate(void);
+int sclp_service_call(sclp_cmdw_t command, void *sccb);
 
 /* useful inlines */