[ros-diffs] [ion] 24687: - Add hal.h from TinyKRNL containing internal definitions for fstub (MBR, Partiton Table, Partition Table Entry, Layout structures) and helper macros. Some structures come from disk.sys sample in the DDK.

Author: ion
Date: Sun Nov  5 23:44:38 2006
New Revision: 24687

URL: http://svn.reactos.org/svn/reactos?rev=24687&view=rev
Log:
- Add hal.h from TinyKRNL containing internal definitions for fstub (MBR, Partiton Table,
Partition Table Entry, Layout structures) and helper macros. Some structures come from
disk.sys sample in the DDK.

Added:
    trunk/reactos/ntoskrnl/include/internal/hal.h

Added: trunk/reactos/ntoskrnl/include/internal/hal.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/hal.h (added)
+++ trunk/reactos/ntoskrnl/include/internal/hal.h Sun Nov  5 23:44:38 2006
@@ -1,0 +1,108 @@
+/*
+ * PROJECT:         ReactOS Kernel
+ * LICENSE:         GPL - See COPYING in the top level directory
+ * FILE:            ntoskrnl/include/hal.h
+ * PURPOSE:         Internal header for the I/O HAL Functions (Fstub)
+ * PROGRAMMERS:     Alex Ionescu (alex.ionescu(a)reactos.org)
+ */
+#ifndef _HAL_
+#define _HAL_
+
+//
+// Various offsets in the boot record
+//
+#define PARTITION_TABLE_OFFSET                      (0x1BE / 2)
+#define BOOT_SIGNATURE_OFFSET                       ((0x200 / 2) - 1)
+#define BOOT_RECORD_RESERVED                        0x1BC
+#define BOOT_RECORD_SIGNATURE                       0xAA55
+#define NUM_PARTITION_TABLE_ENTRIES                 4
+
+//
+// Helper Macros
+//
+#define GET_STARTING_SECTOR(p)                      \
+    ((ULONG)(p->StartingSectorLsb0) +               \
+     (ULONG)(p->StartingSectorLsb1 << 8 ) +         \
+     (ULONG)(p->StartingSectorMsb0 << 16) +         \
+     (ULONG)(p->StartingSectorMsb1 << 24))
+
+#define GET_ENDING_S_OF_CHS(p)                      \
+    ((UCHAR)(p->EndingCylinderLsb & 0x3F))
+
+#define GET_PARTITION_LENGTH(p)                     \
+    ((ULONG)(p->PartitionLengthLsb0) +              \
+     (ULONG)(p->PartitionLengthLsb1 << 8) +         \
+     (ULONG)(p->PartitionLengthMsb0 << 16) +        \
+     (ULONG)(p->PartitionLengthMsb1 << 24))
+
+//
+// Structure describing a partition
+//
+typedef struct _PARTITION_DESCRIPTOR
+{
+    UCHAR ActiveFlag;
+    UCHAR StartingTrack;
+    UCHAR StartingCylinderLsb;
+    UCHAR StartingCylinderMsb;
+    UCHAR PartitionType;
+    UCHAR EndingTrack;
+    UCHAR EndingCylinderLsb;
+    UCHAR EndingCylinderMsb;
+    UCHAR StartingSectorLsb0;
+    UCHAR StartingSectorLsb1;
+    UCHAR StartingSectorMsb0;
+    UCHAR StartingSectorMsb1;
+    UCHAR PartitionLengthLsb0;
+    UCHAR PartitionLengthLsb1;
+    UCHAR PartitionLengthMsb0;
+    UCHAR PartitionLengthMsb1;
+} PARTITION_DESCRIPTOR, *PPARTITION_DESCRIPTOR;
+
+//
+// Structure describing a boot sector
+//
+typedef struct _BOOT_SECTOR_INFO
+{
+    UCHAR JumpByte[1];
+    UCHAR Ignore1[2];
+    UCHAR OemData[8];
+    UCHAR BytesPerSector[2];
+    UCHAR Ignore2[6];
+    UCHAR NumberOfSectors[2];
+    UCHAR MediaByte[1];
+    UCHAR Ignore3[2];
+    UCHAR SectorsPerTrack[2];
+    UCHAR NumberOfHeads[2];
+} BOOT_SECTOR_INFO, *PBOOT_SECTOR_INFO;
+
+//
+// Partition Table and Disk Layout
+//
+typedef struct _PARTITION_TABLE
+{
+    PARTITION_INFORMATION PartitionEntry[4];
+} PARTITION_TABLE, *PPARTITION_TABLE;
+
+typedef struct _DISK_LAYOUT
+{
+    ULONG TableCount;
+    ULONG Signature;
+    PARTITION_TABLE PartitionTable[1];
+} DISK_LAYOUT, *PDISK_LAYOUT;
+
+//
+// Partition Table Entry
+//
+typedef struct _PTE
+{
+    UCHAR ActiveFlag;
+    UCHAR StartingTrack;
+    USHORT StartingCylinder;
+    UCHAR PartitionType;
+    UCHAR EndingTrack;
+    USHORT EndingCylinder;
+    ULONG StartingSector;
+    ULONG PartitionLength;
+} PTE, *PPTE;
+
+#endif