1 files changed, 65 insertions, 0 deletions

diff --git a/src/include/linux/hdreg.h b/src/include/linux/hdreg.h
new file mode 100644
index 0000000..e6c593f
--- /dev/null
+++ b/src/include/linux/hdreg.h
@@ -0,0 +1,65 @@
+/*
+ * This file contains some defines for the AT-hd-controller.
+ * Various sources. Check out some definitions (see comments with
+ * a ques).
+ */
+#ifndef _HDREG_H
+#define _HDREG_H
+
+/* Hd controller regs. Ref: IBM AT Bios-listing */
+#define HD_DATA         0x1f0   /* _CTL when writing */
+#define HD_ERROR        0x1f1   /* see err-bits */
+#define HD_NSECTOR      0x1f2   /* nr of sectors to read/write */
+#define HD_SECTOR       0x1f3   /* starting sector */
+#define HD_LCYL         0x1f4   /* starting cylinder */
+#define HD_HCYL         0x1f5   /* high byte of starting cyl */
+#define HD_CURRENT      0x1f6   /* 101dhhhh , d=drive, hhhh=head */
+#define HD_STATUS       0x1f7   /* see status-bits */
+#define HD_PRECOMP HD_ERROR     /* same io address, read=error, write=precomp */
+#define HD_COMMAND HD_STATUS    /* same io address, read=status, write=cmd */
+
+#define HD_CMD          0x3f6
+
+/* Bits of HD_STATUS */
+#define ERR_STAT        0x01
+#define INDEX_STAT      0x02
+#define ECC_STAT        0x04    /* Corrected error */
+#define DRQ_STAT        0x08
+#define SEEK_STAT       0x10
+#define WRERR_STAT      0x20
+#define READY_STAT      0x40
+#define BUSY_STAT       0x80
+
+/* Values for HD_COMMAND */
+#define WIN_RESTORE             0x10
+#define WIN_READ                0x20
+#define WIN_WRITE               0x30
+#define WIN_VERIFY              0x40
+#define WIN_FORMAT              0x50
+#define WIN_INIT                0x60
+#define WIN_SEEK                0x70
+#define WIN_DIAGNOSE            0x90
+#define WIN_SPECIFY             0x91
+
+/* Bits for HD_ERROR */
+#define MARK_ERR        0x01    /* Bad address mark ? */
+#define TRK0_ERR        0x02    /* couldn't find track 0 */
+#define ABRT_ERR        0x04    /* ? */
+#define ID_ERR          0x10    /* ? */
+#define ECC_ERR         0x40    /* ? */
+#define BBD_ERR         0x80    /* ? */
+
+struct partition {
+        unsigned char boot_ind;         /* 0x80 - active (unused) */
+        unsigned char head;             /* ? */
+        unsigned char sector;           /* ? */
+        unsigned char cyl;              /* ? */
+        unsigned char sys_ind;          /* ? */
+        unsigned char end_head;         /* ? */
+        unsigned char end_sector;       /* ? */
+        unsigned char end_cyl;          /* ? */
+        unsigned int start_sect;        /* starting sector counting from 0 */
+        unsigned int nr_sects;          /* nr of sectors in partition */
+};
+
+#endif