[PATCH] s390: export ipl device parameters

Sysfs interface to export ipl device parameters.  Dependent on the ipl type
the interface will look like this:

- ccw ipl:

/sys/firmware/ipl/device
		 /ipl_type

- fcp ipl:

/sys/firmware/ipl/binary_parameter
		 /bootprog
		 /br_lba
		 /device
		 /ipl_type
		 /lun
		 /scp_data
		 /wwpn

- otherwise (unknown that is):

/sys/firmware/ipl/ipl_type

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index 0d51c484c2ea..348a88137445 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -8,11 +8,14 @@
 #ifndef _ASM_S390_SETUP_H
 #define _ASM_S390_SETUP_H
 
+#include <asm/types.h>
+
 #define PARMAREA                0x10400
 #define COMMAND_LINE_SIZE       896
 #define RAMDISK_ORIGIN          0x800000
 #define RAMDISK_SIZE            0x800000
 #define MEMORY_CHUNKS           16      /* max 0x7fff */
+#define IPL_PARMBLOCK_ORIGIN    0x2000
 
 #ifndef __ASSEMBLY__
 
@@ -64,6 +67,53 @@ extern unsigned int console_irq;
 #define SET_CONSOLE_3215        do { console_mode = 2; } while (0)
 #define SET_CONSOLE_3270        do { console_mode = 3; } while (0)
 
+struct ipl_list_header {
+        u32 length;
+        u8  reserved[3];
+        u8  version;
+} __attribute__((packed));
+
+struct ipl_block_fcp {
+        u32 length;
+        u8  pbt;
+        u8  reserved1[322-1];
+        u16 devno;
+        u8  reserved2[4];
+        u64 wwpn;
+        u64 lun;
+        u32 bootprog;
+        u8  reserved3[12];
+        u64 br_lba;
+        u32 scp_data_len;
+        u8  reserved4[260];
+        u8  scp_data[];
+} __attribute__((packed));
+
+struct ipl_parameter_block {
+        union {
+                u32 length;
+                struct ipl_list_header header;
+        } hdr;
+        struct ipl_block_fcp fcp;
+} __attribute__((packed));
+
+#define IPL_MAX_SUPPORTED_VERSION (0)
+
+#define IPL_TYPE_FCP (0)
+
+/*
+ * IPL validity flags and parameters as detected in head.S
+ */
+extern u32 ipl_parameter_flags;
+extern u16 ipl_devno;
+
+#define IPL_DEVNO_VALID         (ipl_parameter_flags & 1)
+#define IPL_PARMBLOCK_VALID     (ipl_parameter_flags & 2)
+
+#define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
+                                 IPL_PARMBLOCK_ORIGIN)
+#define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.length)
+
 #else 
 
 #ifndef __s390x__