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Diffstat (limited to 'i386/i386at/nhdreg.h')
| -rw-r--r-- | i386/i386at/nhdreg.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/i386/i386at/nhdreg.h b/i386/i386at/nhdreg.h new file mode 100644 index 0000000..d0ef197 --- /dev/null +++ b/i386/i386at/nhdreg.h @@ -0,0 +1,120 @@ +/* + * Copyright (c) 1994 Shantanu Goel + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + */ + +/* + * Hard disk controller. + */ + +#define HD_DATA(p) (p) /* data register */ +#define HD_ERROR(p) ((p) + 1) /* error register */ +#define HD_PRECOMP(p) ((p) + 1) /* precomp register */ +#define HD_SECTCNT(p) ((p) + 2) /* sector count register */ +#define HD_SECT(p) ((p) + 3) /* sector number register */ +#define HD_CYLLO(p) ((p) + 4) /* cylinder number low */ +#define HD_CYLHI(p) ((p) + 5) /* cylinder number high */ +#define HD_DRVHD(p) ((p) + 6) /* drive head register */ +#define HD_STATUS(p) ((p) + 7) /* status register */ +#define HD_CMD(p) ((p) + 7) /* command register */ + +/* + * Status register + */ +#define ST_BUSY 0x80 /* controller is busy */ +#define ST_READY 0x40 /* drive is ready */ +#define ST_WRTFLT 0x20 /* write fault */ +#define ST_SEEK 0x10 /* seek complete */ +#define ST_DREQ 0x08 /* data request */ +#define ST_ECC 0x04 /* ECC corrected data */ +#define ST_INDEX 0x02 /* index pulse */ +#define ST_ERROR 0x01 /* an operation resulted in error */ + +/* + * Error register + */ +#define ERR_DAM 0x01 /* data address mark not found */ +#define ERR_TR0 0x02 /* track 0 not found */ +#define ERR_ABORT 0x04 /* command aborted */ +#define ERR_ID 0x10 /* sector not found */ +#define ERR_ECC 0x40 /* uncorrectable ECC error */ +#define ERR_BADBLK 0x80 /* bad block detected */ + +/* + * Commands + */ +#define CMD_RESTORE 0x10 +#define CMD_READ 0x20 +#define CMD_WRITE 0x30 +#define CMD_SETPARAM 0x91 +#define CMD_READMULTI 0xc4 +#define CMD_WRITEMULTI 0xc5 +#define CMD_SETMULTI 0xc6 +#define CMD_IDENTIFY 0xec + +#if 0 +#define PDLOCATION 29 /* XXX: belongs in <i386at/disk.h> */ +#endif + +#define BAD_BLK 0x80 +#define SECSIZE 512 + +/* + * Information returned by IDENTIFY command. + */ +struct hdident { + u_short id_config; /* flags */ + u_short id_npcyl; /* # physical cylinders */ + u_short id_rsvd2; /* reserved (word 2) */ + u_short id_nptrk; /* # physical tracks */ + u_short id_bptrk; /* unformatted bytes/track */ + u_short id_bpsect; /* unformatted bytes/sector */ + u_short id_npsect; /* # physical sectors/track */ + u_short id_vendor0; /* vendor unique */ + u_short id_vendor1; /* vendor unique */ + u_short id_vendor2; /* vendor unique */ + u_char id_serno[20]; /* serial #: 0 = unspecified */ + u_short id_buftype; /* ??? */ + u_short id_bufsize; /* 512 byte increments: 0 = unspecified */ + u_short id_eccbytes; /* for R/W LONG commands: 0 = unspecified */ + u_char id_rev[8]; /* firmware revision: 0 = unspecified */ + u_char id_model[40]; /* model name: 0 = unspecified */ + u_char id_multisize; /* max multiple I/O size: 0 = unsupported */ + u_char id_vendor3; /* vendor unique */ + u_short id_dwordio; /* 0 = unsupported; 1 = implemented */ + u_char id_vendor4; /* vendor unique */ + u_char id_capability; /* 0:DMA 1:LBA 2:IORDYsw 3:IORDY:sup */ + u_short id_rsvd50; /* reserved (word 50) */ + u_char id_vendor5; /* vendor unique */ + u_char id_pio; /* 0=slow, 1=medium, 2=fast */ + u_char id_vendor6; /* vendor unique */ + u_char id_dma; /* 0=slow, 1=medium, 2=fast */ + u_short id_valid; /* 0:logical 1:eide */ + u_short id_nlcyl; /* # logical cylinders */ + u_short id_nltrk; /* # logical tracks */ + u_short id_nlsect; /* # logical sectors/track */ + u_short id_capacity0; /* logical total sectors on drive */ + u_short id_capacity1; /* (2 words, misaligned int) */ + u_char id_multisect; /* current multiple sector count */ + u_char id_multivalid; /* bit 0=1, multisect field is valid */ + u_short id_totsect; /* total number of sectors */ + u_short id_dma1; /* single word DMA info */ + u_short id_dmamulti; /* multiple word DMA info */ + u_short id_eidepiomode; /* 0:mode3 1:mode4 */ + u_short id_eidedmamin; /* min multiple word DMA cycle time (ns) */ + u_short id_eidedmatime; /* recomended DMA cycle time (ns) */ + u_short id_eidepio; /* min cycle time (ns), no IORDY */ + u_short id_eidepioiordy;/* min cycle time (ns, with IORDY */ + u_short id_rsvd69; /* reserved (word 69) */ + u_short id_rsvd70; /* reserved (word 70) */ +}; |