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Annotation of sys/arch/alpha/include/prom.h, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: prom.h,v 1.8 2000/11/08 21:27:22 ericj Exp $ */
                      2: /* $NetBSD: prom.h,v 1.12 2000/06/08 03:10:06 thorpej Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Author: Keith Bostic, Chris G. Demetriou
                      9:  *
                     10:  * Permission to use, copy, modify and distribute this software and
                     11:  * its documentation is hereby granted, provided that both the copyright
                     12:  * notice and this permission notice appear in all copies of the
                     13:  * software, derivative works or modified versions, and any portions
                     14:  * thereof, and that both notices appear in supporting documentation.
                     15:  *
                     16:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     17:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
                     18:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     19:  *
                     20:  * Carnegie Mellon requests users of this software to return to
                     21:  *
                     22:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
                     23:  *  School of Computer Science
                     24:  *  Carnegie Mellon University
                     25:  *  Pittsburgh PA 15213-3890
                     26:  *
                     27:  * any improvements or extensions that they make and grant Carnegie the
                     28:  * rights to redistribute these changes.
                     29:  */
                     30:
                     31: #ifndef        ASSEMBLER
                     32: struct prom_vec {
                     33:        u_int64_t       routine;
                     34:        void            *routine_arg;
                     35: };
                     36:
                     37: /* The return value from a prom call. */
                     38: typedef union {
                     39:        struct {
                     40:                u_int64_t
                     41:                        retval  : 32,           /* return value. */
                     42:                        unit    : 8,
                     43:                        mbz     : 8,
                     44:                        error   : 13,
                     45:                        status  : 3;
                     46:        } u;
                     47:        u_int64_t bits;
                     48: } prom_return_t;
                     49:
                     50: #ifdef _STANDALONE
                     51: int    getchar(void);
                     52: int    prom_open(char *, int);
                     53: void   putchar(int);
                     54: #endif
                     55:
                     56: void   prom_halt(int) __attribute__((__noreturn__));
                     57: int    prom_getenv(int, char *, int);
                     58:
                     59: void   hwrpb_primary_init(void);
                     60: void   hwrpb_restart_setup(void);
                     61: #endif
                     62:
                     63: /* Prom operation values. */
                     64: #define        PROM_R_CLOSE            0x11
                     65: #define        PROM_R_GETC             0x01
                     66: #define        PROM_R_GETENV           0x22
                     67: #define        PROM_R_OPEN             0x10
                     68: #define        PROM_R_PUTS             0x02
                     69: #define        PROM_R_READ             0x13
                     70: #define        PROM_R_WRITE            0x14
                     71: #define        PROM_R_IOCTL            0x12
                     72:
                     73: /* Prom IOCTL operation subcodes */
                     74: #define        PROM_I_SKIP2IRG         1
                     75: #define        PROM_I_SKIP2MARK        2
                     76: #define        PROM_I_REWIND           3
                     77: #define        PROM_I_WRITEMARK        4
                     78:
                     79: /* Environment variable values. */
                     80: #define        PROM_E_BOOTED_DEV       0x4
                     81: #define        PROM_E_BOOTED_FILE      0x6
                     82: #define        PROM_E_BOOTED_OSFLAGS   0x8
                     83: #define        PROM_E_TTY_DEV          0xf
                     84: #define        PROM_E_SCSIID           0x42
                     85: #define        PROM_E_SCSIFAST         0x43
                     86:
                     87: #if defined(_STANDALONE) || defined(ENABLEPROM)
                     88: /*
                     89:  * These can't be called from the kernel without great care.
                     90:  *
                     91:  * There have to be stub routines to do the copying that ensures that the
                     92:  * PROM doesn't get called with an address larger than 32 bits.  Calls that
                     93:  * either don't need to copy anything, or don't need the copy because it's
                     94:  * already being done elsewhere, are defined here.
                     95:  */
                     96: #define        prom_close(chan)                                                \
                     97:        prom_dispatch(PROM_R_CLOSE, chan, 0, 0, 0)
                     98: #define        prom_read(chan, len, buf, blkno)                                \
                     99:        prom_dispatch(PROM_R_READ, chan, len, (u_int64_t)buf, blkno)
                    100: #define        prom_write(chan, len, buf, blkno)                               \
                    101:        prom_dispatch(PROM_R_WRITE, chan, len, (u_int64_t)buf, blkno)
                    102: #define        prom_ioctl(chan, op, count)                                     \
                    103:        prom_dispatch(PROM_R_IOCTL, chan, op, (int64_t)count, 0, 0)
                    104: #define        prom_putstr(chan, str, len)                                     \
                    105:        prom_dispatch(PROM_R_PUTS, chan, (u_int64_t)str, len, 0)
                    106: #define        prom_getc(chan)                                                 \
                    107:        prom_dispatch(PROM_R_GETC, chan, 0, 0, 0)
                    108: #define prom_getenv_disp(id, buf, len)                                 \
                    109:        prom_dispatch(PROM_R_GETENV, id, (u_int64_t)buf, len, 0)
                    110: #endif
                    111:
                    112: #ifndef ASSEMBLER
                    113: #ifdef _KERNEL
                    114: int    prom_enter(void);
                    115: void   prom_leave(int);
                    116:
                    117: void   promcnputc(dev_t, int);
                    118: int    promcngetc(dev_t);
                    119: int    promcnlookc(dev_t, char *);
                    120:
                    121: u_int64_t      prom_dispatch(u_int64_t, u_int64_t, u_int64_t, u_int64_t,
                    122:                    u_int64_t);
                    123: #endif /* _KERNEL */
                    124: #endif /* ASSEMBLER */