make bio and disk drivers not do spl0 so can call from panic without trap 2's

[unix-history] / usr / src / sys / vax / uba / udareg.h

/*      udareg.h        4.1     81/11/04        */

/*
* UDA-50 registers and structures
*/

struct udadevice {
       short   udaip;          /* initialization and polling */
       short   udasa;          /* status and address */
};

#define UDA_ERR         0100000 /* error bit */
#define UDA_STEP4       0040000 /* step 4 has started */
#define UDA_STEP3       0020000 /* step 3 has started */
#define UDA_STEP2       0010000 /* step 2 has started */
#define UDA_STEP1       0004000 /* step 1 has started */
#define UDA_NV          0002000 /* no host settable interrupt vector */
#define UDA_QB          0001000 /* controller supports Q22 bus */
#define UDA_DI          0000400 /* controller implements diagnostics */
#define UDA_IE          0000200 /* interrupt enable */
#define UDA_PI          0000001 /* host requests adapter purge interrupts */
#define UDA_GO          0000001 /* start operation, after init */


/*
* UDA Communications Area
*/

struct udaca {
       short   ca_xxx1;        /* unused */
       char    ca_xxx2;        /* unused */
       char    ca_bdp;         /* BDP to purge */
       short   ca_cmdint;      /* command queue transition interrupt flag */
       short   ca_rspint;      /* response queue transition interrupt flag */
       long    ca_rspdsc[NRSP];/* response descriptors */
       long    ca_cmddsc[NCMD];/* command descriptors */
};

#define ca_ringbase     ca_rspdsc[0]

#define UDA_OWN 0x80000000      /* UDA owns this descriptor */
#define UDA_INT 0x40000000      /* allow interrupt on ring transition */

/*
* MSCP packet info
*/
struct mscp_header {
       short   uda_msglen;     /* length of MSCP packet */
       char    uda_credits;    /* low 4 bits: credits, high 4 bits: msgtype */
       char    uda_vcid;       /* virtual circuit id */
};