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Annotation of sys/sys/memrange.h, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: memrange.h,v 1.4 2002/10/14 21:01:01 matthieu Exp $ */
                      2: /*-
                      3:  * Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
                      4:  * All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  *
                     15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     16:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     17:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     18:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     19:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     20:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     21:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     22:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     23:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     24:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     25:  * SUCH DAMAGE.
                     26:  */
                     27: /*
                     28:  * Memory range attribute operations, peformed on /dev/mem
                     29:  */
                     30:
                     31: /* Memory range attributes */
                     32: #define MDF_UNCACHEABLE                (1<<0)  /* region not cached */
                     33: #define MDF_WRITECOMBINE       (1<<1)  /* region supports "write combine" action */
                     34: #define MDF_WRITETHROUGH       (1<<2)  /* write-through cached */
                     35: #define MDF_WRITEBACK          (1<<3)  /* write-back cached */
                     36: #define MDF_WRITEPROTECT       (1<<4)  /* read-only region */
                     37: #define MDF_UNKNOWN            (1<<5)  /* any state we don't understand */
                     38: #define MDF_ATTRMASK           (0x00ffffff)
                     39:
                     40: #define MDF_FIXBASE            (1<<24) /* fixed base */
                     41: #define MDF_FIXLEN             (1<<25) /* fixed length */
                     42: #define MDF_FIRMWARE           (1<<26) /* set by firmware (XXX not useful?) */
                     43: #define MDF_ACTIVE             (1<<27) /* currently active */
                     44: #define MDF_BOGUS              (1<<28) /* we don't like it */
                     45: #define MDF_FIXACTIVE          (1<<29) /* can't be turned off */
                     46: #define MDF_BUSY               (1<<30) /* range is in use */
                     47: #define MDF_FORCE              (1<<31) /* force risky changes */
                     48:
                     49: struct mem_range_desc
                     50: {
                     51:        u_int64_t       mr_base;
                     52:        u_int64_t       mr_len;
                     53:        int             mr_flags;
                     54:        char            mr_owner[8];
                     55: };
                     56:
                     57: struct mem_range_op
                     58: {
                     59:        struct mem_range_desc   *mo_desc;
                     60:        int                     mo_arg[2];
                     61: #define MEMRANGE_SET_UPDATE    0
                     62: #define MEMRANGE_SET_REMOVE    1
                     63:        /* XXX want a flag that says "set and undo when I exit" */
                     64: };
                     65:
                     66: #define MEMRANGE_GET   _IOWR('m', 50, struct mem_range_op)
                     67: #define MEMRANGE_SET   _IOW('m', 51, struct mem_range_op)
                     68:
                     69: #ifdef _KERNEL
                     70:
                     71: struct mem_range_softc;
                     72: struct mem_range_ops
                     73: {
                     74:        void    (*init)(struct mem_range_softc *sc);
                     75:        int     (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
                     76:        void    (*initAP)(struct mem_range_softc *sc);
                     77: };
                     78:
                     79: struct mem_range_softc
                     80: {
                     81:        struct mem_range_ops    *mr_op;
                     82:        int                     mr_cap;
                     83:        int                     mr_ndesc;
                     84:        struct mem_range_desc   *mr_desc;
                     85: };
                     86:
                     87: extern struct mem_range_softc mem_range_softc;
                     88:
                     89: __BEGIN_DECLS
                     90: extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
                     91: extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
                     92: extern void mem_range_AP_init(void);
                     93: __END_DECLS
                     94: #endif
                     95: