set interval timer value at boot time according to hz

[unix-history] / usr / src / sys / tahoe / tahoe / cp.h

/*      cp.h    1.2     86/12/06        */

/*
* Tahoe console processor interface
*/

/*
* Reduced DCB layout for byte communication.
*/
#define CPBUFLEN 200            /* Output buffer length */
#ifndef LOCORE
struct  cphdr {
       char    cp_unit;        /* Done bit & unit # */
       char    cp_comm;        /* Command */
       short   cp_count;       /* Counter (when relevant) */
};

struct  cpdcb_o {               /* Output structure */
       struct  cphdr   cp_hdr;
       char    cp_buf[CPBUFLEN]; /* Buffer for output or 'stty' */
};

struct  cpdcb_i {               /* Structure for input */
       struct  cphdr   cp_hdr;
       char    cpi_buf[4];     /* Buffer for input */
};
#endif

#define CPDONE  0x80            /* 'Done' bit in cp_unit */
#define CPTAKE  0x40            /* CP 'ack' to this cpdcb */

/* unit values */
#define CPUNIT  0               /* the CP itself */
#define CPCONS  1               /* console line */
#define CPREMOT 2               /* remote line */
#define CPCLOCK 4               /* realtime clock */

/* commands */
#define CPRESET 0
#define CPWRITE 1               /* write device or register */
#define CPREAD  2               /* read device or register */
#define CPSTTY  3               /* set terminal configuration */
#define CPBOOT  4               /* reboot system */

#if !defined(LOCORE) && defined(KERNEL)
struct  cphdr *cnlast;          /* last command sent to cp */
#endif