98 lines
3.5 KiB
C
98 lines
3.5 KiB
C
/* $OpenBSD: memrange.h,v 1.10 2015/08/18 20:19:32 miod Exp $ */
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/*-
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* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Memory range attribute operations, performed on /dev/mem
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*/
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/* Memory range attributes */
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#define MDF_UNCACHEABLE (1<<0) /* region not cached */
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#define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
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#define MDF_WRITETHROUGH (1<<2) /* write-through cached */
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#define MDF_WRITEBACK (1<<3) /* write-back cached */
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#define MDF_WRITEPROTECT (1<<4) /* read-only region */
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#define MDF_UNKNOWN (1<<5) /* any state we don't understand */
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#define MDF_ATTRMASK (0x00ffffff)
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#define MDF_FIXBASE (1<<24) /* fixed base */
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#define MDF_FIXLEN (1<<25) /* fixed length */
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#define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
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#define MDF_ACTIVE (1<<27) /* currently active */
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#define MDF_BOGUS (1<<28) /* we don't like it */
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#define MDF_FIXACTIVE (1<<29) /* can't be turned off */
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#define MDF_FORCE (1<<31) /* force risky changes */
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struct mem_range_desc {
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u_int64_t mr_base;
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u_int64_t mr_len;
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int mr_flags;
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char mr_owner[8];
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};
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struct mem_range_op {
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struct mem_range_desc *mo_desc;
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int mo_arg[2];
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#define MEMRANGE_SET_UPDATE 0
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#define MEMRANGE_SET_REMOVE 1
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/* XXX want a flag that says "set and undo when I exit" */
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};
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#define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
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#define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
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/* Offset indicating a write combining mapping is requested. */
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#define MEMRANGE_WC_RANGE 0x4000000000000000ULL
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#ifdef _KERNEL
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struct mem_range_softc;
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struct mem_range_ops {
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void (*init)(struct mem_range_softc *sc);
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int (*set)(struct mem_range_softc *sc,
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struct mem_range_desc *mrd, int *arg);
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void (*initAP)(struct mem_range_softc *sc);
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void (*reload)(struct mem_range_softc *sc);
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};
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struct mem_range_softc {
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struct mem_range_ops *mr_op;
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int mr_cap;
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int mr_ndesc;
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struct mem_range_desc *mr_desc;
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};
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extern struct mem_range_softc mem_range_softc;
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__BEGIN_DECLS
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extern void mem_range_attach(void);
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extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
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extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
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extern void mem_range_AP_init(void);
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extern void mem_range_reload(void);
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__END_DECLS
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#endif /* _KERNEL */
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