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authorShao Miller <shao.miller@yrdsb.edu.on.ca>2010-03-09 02:08:36 -0500
committerShao Miller <shao.miller@yrdsb.edu.on.ca>2010-06-11 01:49:10 +0000
commit2f4137d83abc2a63e982439b0506f6a630a91096 (patch)
treeedac3ef5066428bb6d62d9d6287b94c6b93649fa /memdisk/mstructs.h
parent08b3602db548775ca819780de77686a186156ec7 (diff)
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memdisk: Move common structures into headers
Since MDISKCHK.COM (and possibly COM32 modules) could make use of structures found in MEMDISK's setup.c, we move these into a new header file mstructs.h. Also, since the OpenWatcom compiler uses a structure packing prefix and GCC uses a structure packing postfix, we accomodate this with preprocessor definitions around those structures needing to be packed. Signed-off-by: Shao Miller <shao.miller@yrdsb.edu.on.ca>
Diffstat (limited to 'memdisk/mstructs.h')
-rw-r--r--memdisk/mstructs.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/memdisk/mstructs.h b/memdisk/mstructs.h
new file mode 100644
index 00000000..635e47eb
--- /dev/null
+++ b/memdisk/mstructs.h
@@ -0,0 +1,112 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
+ * Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
+ * Portions copyright 2009-2010 Shao Miller
+ * [El Torito code, mBFT, "safe hook"]
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/* These structures are common to MEMDISK and MDISKCHK.COM */
+
+MEMDISK_PACKED_PREFIX
+struct safe_hook {
+ uint8_t jump[3]; /* Max. three bytes for jump */
+ uint8_t signature[8]; /* "$INT13SF" */
+ uint8_t vendor[8]; /* "MEMDISK " */
+ uint32_t old_hook; /* SEG:OFF for previous INT 13h hook */
+ uint32_t flags; /* "Safe hook" flags */
+ /* The next field is a MEMDISK extension to the "safe hook" structure */
+ uint32_t mBFT; /* Offset from hook to the mBFT; refilled
+ * by setup() with the physical address
+ */
+} MEMDISK_PACKED_POSTFIX;
+
+/* Requirement for struct acpi_description_header */
+#include "../memdisk/acpi.h"
+
+MEMDISK_PACKED_PREFIX
+struct mBFT {
+ struct acpi_description_header acpi;
+ uint32_t safe_hook; /* "Safe hook" physical address */
+} MEMDISK_PACKED_POSTFIX;
+
+MEMDISK_PACKED_PREFIX
+/* EDD disk parameter table */
+struct edd_dpt {
+ uint16_t len; /* Length of table */
+ uint16_t flags; /* Information flags */
+ uint32_t c; /* Physical cylinders (count!) */
+ uint32_t h; /* Physical heads (count!) */
+ uint32_t s; /* Physical sectors/track (count!) */
+ uint64_t sectors; /* Total sectors */
+ uint16_t bytespersec; /* Bytes/sector */
+ uint16_t dpte_off, dpte_seg; /* DPTE pointer */
+ uint16_t dpikey; /* Device Path Info magic */
+ uint8_t dpilen; /* Device Path Info length */
+ uint8_t res1; /* Reserved */
+ uint16_t res2; /* Reserved */
+ uint8_t bustype[4]; /* Host bus type */
+ uint8_t inttype[8]; /* Interface type */
+ uint64_t intpath; /* Interface path */
+ uint64_t devpath[2]; /* Device path (double QuadWord!) */
+ uint8_t res3; /* Reserved */
+ uint8_t chksum; /* DPI checksum */
+} MEMDISK_PACKED_POSTFIX;
+
+/* Requirement for struct edd4_cd_pkt */
+#include "../memdisk/eltorito.h"
+
+MEMDISK_PACKED_PREFIX
+struct patch_area {
+ uint32_t diskbuf;
+ uint32_t disksize;
+ uint16_t cmdline_off, cmdline_seg;
+
+ uint32_t oldint13;
+ uint32_t oldint15;
+
+ uint16_t olddosmem;
+ uint8_t bootloaderid;
+ uint8_t _pad1;
+
+ uint16_t dpt_ptr;
+ /* End of the official MemDisk_Info */
+ uint8_t driveshiftlimit; /* Do not shift drives above this region */
+ uint8_t _pad2; /* Pad to DWORD */
+ uint16_t _pad3; /* Pad to QWORD */
+
+ uint16_t memint1588;
+
+ uint16_t cylinders;
+ uint16_t heads;
+ uint32_t sectors;
+
+ uint32_t mem1mb;
+ uint32_t mem16mb;
+
+ uint8_t driveno;
+ uint8_t drivetype;
+ uint8_t drivecnt;
+ uint8_t configflags;
+
+#define CONFIG_READONLY 0x01
+#define CONFIG_RAW 0x02
+#define CONFIG_SAFEINT 0x04
+#define CONFIG_BIGRAW 0x08 /* MUST be 8! */
+#define CONFIG_MODEMASK 0x0e
+
+ uint16_t mystack;
+ uint16_t statusptr;
+
+ dpt_t dpt;
+ struct edd_dpt edd_dpt;
+ struct edd4_cd_pkt cd_pkt; /* Only really in a memdisk_iso_* hook */
+} MEMDISK_PACKED_POSTFIX;
+