1 /* $OpenBSD: memrange.h,v 1.10 2015/08/18 20:19:32 miod 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, performed 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_FORCE (1<<31) /* force risky changes */ 47 48 struct mem_range_desc { 49 u_int64_t mr_base; 50 u_int64_t mr_len; 51 int mr_flags; 52 char mr_owner[8]; 53 }; 54 55 struct mem_range_op { 56 struct mem_range_desc *mo_desc; 57 int mo_arg[2]; 58 #define MEMRANGE_SET_UPDATE 0 59 #define MEMRANGE_SET_REMOVE 1 60 /* XXX want a flag that says "set and undo when I exit" */ 61 }; 62 63 #define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op) 64 #define MEMRANGE_SET _IOW('m', 51, struct mem_range_op) 65 66 /* Offset indicating a write combining mapping is requested. */ 67 #define MEMRANGE_WC_RANGE 0x4000000000000000ULL 68 69 #ifdef _KERNEL 70 71 struct mem_range_softc; 72 struct mem_range_ops { 73 void (*init)(struct mem_range_softc *sc); 74 int (*set)(struct mem_range_softc *sc, 75 struct mem_range_desc *mrd, int *arg); 76 void (*initAP)(struct mem_range_softc *sc); 77 void (*reload)(struct mem_range_softc *sc); 78 }; 79 80 struct mem_range_softc { 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 void mem_range_attach(void); 91 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg); 92 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg); 93 extern void mem_range_AP_init(void); 94 extern void mem_range_reload(void); 95 __END_DECLS 96 #endif /* _KERNEL */ 97 98