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/* $OpenBSD: memrange.h,v 1.9 2015/06/22 18:57:26 kettenis Exp $ */
/*-
* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Memory range attribute operations, peformed on /dev/mem
*/
/* Memory range attributes */
#define MDF_UNCACHEABLE (1<<0) /* region not cached */
#define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
#define MDF_WRITETHROUGH (1<<2) /* write-through cached */
#define MDF_WRITEBACK (1<<3) /* write-back cached */
#define MDF_WRITEPROTECT (1<<4) /* read-only region */
#define MDF_UNKNOWN (1<<5) /* any state we don't understand */
#define MDF_ATTRMASK (0x00ffffff)
#define MDF_FIXBASE (1<<24) /* fixed base */
#define MDF_FIXLEN (1<<25) /* fixed length */
#define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
#define MDF_ACTIVE (1<<27) /* currently active */
#define MDF_BOGUS (1<<28) /* we don't like it */
#define MDF_FIXACTIVE (1<<29) /* can't be turned off */
#define MDF_FORCE (1<<31) /* force risky changes */
struct mem_range_desc {
u_int64_t mr_base;
u_int64_t mr_len;
int mr_flags;
char mr_owner[8];
};
struct mem_range_op {
struct mem_range_desc *mo_desc;
int mo_arg[2];
#define MEMRANGE_SET_UPDATE 0
#define MEMRANGE_SET_REMOVE 1
/* XXX want a flag that says "set and undo when I exit" */
};
#define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
#define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
/* Offset indicating a write combining mapping is requested. */
#define MEMRANGE_WC_RANGE 0x4000000000000000ULL
#ifdef _KERNEL
struct mem_range_softc;
struct mem_range_ops {
void (*init)(struct mem_range_softc *sc);
int (*set)(struct mem_range_softc *sc,
struct mem_range_desc *mrd, int *arg);
void (*initAP)(struct mem_range_softc *sc);
void (*reload)(struct mem_range_softc *sc);
};
struct mem_range_softc {
struct mem_range_ops *mr_op;
int mr_cap;
int mr_ndesc;
struct mem_range_desc *mr_desc;
};
extern struct mem_range_softc mem_range_softc;
__BEGIN_DECLS
extern void mem_range_attach(void);
extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
extern void mem_range_AP_init(void);
extern void mem_range_reload(void);
__END_DECLS
#endif /* _KERNEL */
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