/*
* linux/include/linux/edd.h
- * Copyright (C) 2002, 2003 Dell Inc.
+ * Copyright (C) 2002, 2003, 2004 Dell Inc.
* by Matt Domsch <Matt_Domsch@dell.com>
*
* structures and definitions for the int 13h, ax={41,48}h
* available at http://www.t13.org/docs2002/d1572r0.pdf. It is
* very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
*
- * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch table
- * in the empty_zero_block that contains a list of BIOS-enumerated
+ * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
+ * table in the boot_params that contains a list of BIOS-enumerated
* boot devices.
* In arch/{i386,x86_64}/kernel/setup.c, this information is
* transferred into the edd structure, and in drivers/firmware/edd.c, that
#define _LINUX_EDD_H
#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
- in empty_zero_block - treat this as 1 byte */
-#define EDDBUF 0x600 /* addr of edd_info structs in empty_zero_block */
+ in boot_params - treat this as 1 byte */
+#define EDDBUF 0x600 /* addr of edd_info structs in boot_params */
#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
#define EDDEXTSIZE 8 /* change these if you muck with the structures */
#define EDDPARMSIZE 74
#define EDDMAGIC1 0x55AA
#define EDDMAGIC2 0xAA55
-#define READ_SECTORS 0x02
-#define MBR_SIG_OFFSET 0x1B8
-#define DISK80_SIG_BUFFER 0x2cc
+
+#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
+#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
+#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
+#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
+#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
+ in boot_params - treat this as 1 byte */
#ifndef __ASSEMBLY__
#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
struct edd_device_params params;
} __attribute__ ((packed));
-extern struct edd_info edd[EDDMAXNR];
-extern unsigned char eddnr;
-extern unsigned int edd_disk80_sig;
+struct edd {
+ unsigned int mbr_signature[EDD_MBR_SIG_MAX];
+ struct edd_info edd_info[EDDMAXNR];
+ unsigned char mbr_signature_nr;
+ unsigned char edd_info_nr;
+};
+
+extern struct edd edd;
#endif /*!__ASSEMBLY__ */