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Power 6/32 Unix version 1.2b
/*
** Header file for the VDDC (Versabus Direct Disk Controller) Driver
*/
#define NSECPTRK 32 /* #sectors/track - fixed by VDDC */
#define SECTSIZ 512 /* sector size fixed by VDDC */
#define L2SIZ 9 /* log2 of sector size */
#define L2BSIZ 10 /* log2 of block size */
#define NVDDRV 3 /* number of drive types supported */
/*
** DCB Command Codes
*/
#define RD 0x80 /* Read Data */
#define FTR 0xc0 /* Full Track Read */
#define RAS 0x90 /* Read and Scatter */
#define C 0xa0 /* Compare */
#define FTC 0xe0 /* Full Track Compare */
#define RHDE 0x180 /* Read Header, Data & ECC (not used) */
#define WD 0x00 /* Write Data */
#define FTW 0x40 /* Full Track Write */
#define WTC 0x20 /* Write Then Compare */
#define FTWTC 0x60 /* Full Track Write Then Compare */
#define GAW 0x10 /* Gather and Write */
#define WDE 0x100 /* Write Data & ECC (not used) */
#define FSECT 0x900 /* Format Sector */
#define GWC 0x30 /* Gather Write & Compare */
#define VDSTART 0x800 /* Start drives */
#define VDRELEASE 0xa00 /* Stop drives */
#define SEEK 0xb00 /* Seek */
#define INIT 0xc00 /* Initialize VDDC */
#define DIAG 0xd00 /* Diagnose (self-test) VDDC */
#define RSTCFG 0xe00 /* Reset/Configure VDDC/DDI/Drive(s) */
#define VDSTATUS 0xf00 /* VDDC Status */
#define ABORT 0x80000000 /* To be written to VDDC Cntrl Register */
/*
** Error / Status Symbolic Constants
*/
#define HCRCERR 0x1 /* Header CRC Error */
#define HCMPERR 0x2 /* Header Compare Error */
#define WPTERR 0x4 /* Write Protect Error/Status */
#define SZTIMEOUT 0x8 /* Seize timeout Error */
#define DSEEKERR 0x10 /* Disk Seek Error */
#define UCDATERR 0x20 /* Uncorrectable Data Error */
#define NOTCYLERR 0x40 /* Not on Cylinder Error */
#define DRVNRDY 0x80 /* Drive Not Ready Error/Status */
#define ALTACC 0x100 /* Alternate (track) accessed Status */
#define SEEKSTRT 0x200 /* Seek Started Status */
#define INVDADR 0x400 /* Invalid Disk Address Error */
#define DNEMEM 0x800 /* Non-Existant Memory Error */
#define PARERR 0x1000 /* Memory Parity Error */
#define DCOMPERR 0x2000 /* Data Compare Error */
#define DDIRDY 0x4000 /* DDI Ready Error/Status */
#define OPABRT 0x8000 /* Operator Abort (Host) Error/Status */
#define DSERLY 0x10000 /* Data Strobe Early */
#define DSLATE 0x20000 /* Data Strobe Late */
#define TOPLUS 0x40000 /* Track Offset Plus */
#define TOMNUS 0x80000 /* Track Offset Minus */
#define CPDCRT 0x100000 /* Cntlr Performed Data Correction */
#define HRDERR 0x200000 /* Hard Error */
#define SFTERR 0x400000 /* Soft Error (retry succesful) */
#define ANYERR 0x800000 /* Any Error */
/*
** DCB Status Symbolic Constants
*/
#define DCBABT 0x10000000 /* DCB Aborted */
#define DCBUSC 0x20000000 /* DCB Unsuccesfully Completed */
#define DCBCMP 0x40000000 /* DCB Complete */
#define DCBSTR 0x80000000 /* DCB Started */
/*
** MDCB Status Symbolic Constants
*/
#define CTLRBSY 0x10000000 /* Cntlr Busy */
#define INTCCDE 0x60000000 /* Interrupt Cause Code */
#define DCBINT 0x80000000 /* DCB Interrupt Flag */
/*
** Hard Error Types
*/
#define HTYPES (HCRCERR|HCMPERR|WPTERR|SZTIMEOUT|DSEEKERR|UCDATERR|NOTCYLERR| \
DRVNRDY|INVDADR|DNEMEM|PARERR|DCOMPERR)
/*
** Errors
*/
#define ERRS 0x3FFF
#define CANRETRY (SZTIMEOUT|DSEEKERR|NOTCYLERR|DCOMPERR|UCDATERR| \
PARERR|DNEMEM|HCRCERR|HCMPERR)
/*
** VDDC Interrupt Modes
*/
#define NOINT 0x0 /* No Interrupt */
#define INTERR 0x2 /* Interrupt on Error */
#define INTSUC 0x1 /* Interrupt on Success */
#define INTDUN 0x3 /* Interrupt on Error or Success */
#define CMD_MASK 0xFF0 /* Command code mask */
/* When a tabular approach can be used */
/* again change this back to 0x1F0 */
struct size
{
daddr_t nblocks;
int block0;
};
#define VDMF 0x8000 /* Manufacturer Fault 1=good sector */
#define VDUF 0x4000 /* User Fault 1=good sector */
#define VDALT 0x2000 /* Alternate Sector 1=alternate */
#define VDWPT 0x1000 /* Write Protect 1=Read Only Sector */
/*
** Addr of Memory-Mapped I/O port for VDDC Control Register
*/
/*
** Address of Memory-Mapped I/O Port for VDDC H/W Reset
*/
#define VDDC_RESET(addr) *(addr + 4) = 0; /* reset controller */
/*
** Start i/o to/from controller.
*/
#define VDDC_ATTENTION(ctrl,mdcbadr) \
{ movow(((int)mdcbadr & 0xffff0000)>>16,ctrl) ;\
movow( (int)mdcbadr & 0xffff, ctrl+2);\
}
/*
** Abort controller operation.
*/
#define VDDC_ABORT(ctrl) \
{ \
movow((ABORT & 0xffff0000)>>16,ctrl) ;\
movow(ABORT & 0xffff, ctrl+2);\
}
#define POLLTILLDONE(c, a, x) { vdtimeout = 1000*(x); \
uncache((char *)&a); \
while (!(a & (DCBCMP | DCBABT))) { \
DELAY(1000); \
vdtimeout--; \
uncache((char *)&a); \
if (vdtimeout <= 0) { \
printf("VDDC controller timeout"); \
VDDC_ABORT(c); \
break; \
} \
} \
}
static long vddcaddr[4] = { 0xf2000, 0xf2100, 0xf2200, 0xf2300 };
/* Disk Address */
typedef struct {
char track; /* all 8 bits */
char sector; /* low order 5 bits */
short cylinder; /* low order 12 bits */
} dskadr;
/* DCB Trailer Formats */
/* Read / Write Trailer */
typedef struct {
char *memadr; /* memory address */
long wcount; /* 16 bit word count */
dskadr disk; /* disk address */
} trrw;
/* Seek trailer format */
typedef struct {
dskadr seekaddr;
} trseek;
/* Format Trailer */
typedef struct {
char *addr; /* data buffer to be filled on sector*/
long nsectors; /* # of sectors to be formatted */
dskadr disk; /* Disk physical address info */
dskadr hdr; /* Header address info */
} trfmt;
/* Reset / Configure Trailer */
typedef struct {
long ncyl; /* # cylinders */
long nsurfaces; /* # surfaces */
} treset; /* # of sectors is defined by VDDC */
/* to be 32/track of 512 data bytes each */
/* DCB Format */
typedef struct fmtdcb{
struct fmtdcb *nxtdcb; /* next dcb in chain or End of Chain */
short intflg; /* interrupt settings and flags */
short opcode; /* DCB Command code etc... */
long operrsta; /* Error & Status info */
short fill; /* not used */
char devselect; /* Drive selection */
char trailcnt; /* Trailer Word Count */
long err_memadr; /* Error memory address */
short fill2; /* not used */
short err_wcount; /* Error word count */
char err_trk; /* Error track/sector */
char err_sec; /* Error track/sector */
short err_cyl; /* Error cylinder adr */
union {
trseek seektrail; /* seek command trailer */
trrw rwtrail; /* read/write trailer */
trfmt fmtrail; /* format trailer */
treset resetrail; /* reset/configure trailer */
} trail;
} fmt_dcb;
/* MDCB Format */
typedef struct {
fmt_dcb *firstdcb; /* first dcb in chain */
fmt_dcb *procdcb; /* dcb being processed */
fmt_dcb *intdcb; /* dcb causing interrupt */
long vddcstat; /* VDDC status */
} fmt_mdcb;
static long vdtimeout = 0;
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