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mtrr.h revision 1.2 
      1 /* $NetBSD: mtrr.h,v 1.2 2001/09/10 10:10:33 fvdl Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Bill Sommerfeld
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _I386_MTRR_H_
     40 #define _I386_MTRR_H_
     41 
     42 #define MTRR_I686_FIXED_IDX64K	0
     43 #define MTRR_I686_FIXED_IDX16K	1
     44 #define MTRR_I686_FIXED_IDX4K	3
     45 
     46 #define MTRR_I686_NVAR		8
     47 
     48 #define MTRR_I686_64K_START		0x00000
     49 #define MTRR_I686_16K_START		0x80000
     50 #define MTRR_I686_4K_START		0xc0000
     51 
     52 #define MTRR_I686_NFIXED_64K		1
     53 #define MTRR_I686_NFIXED_16K		2
     54 #define MTRR_I686_NFIXED_4K		8
     55 #define MTRR_I686_NFIXED		11
     56 #define MTRR_I686_NFIXED_SOFT_64K	(MTRR_I686_NFIXED_64K * 8)
     57 #define MTRR_I686_NFIXED_SOFT_16K	(MTRR_I686_NFIXED_16K * 8)
     58 #define MTRR_I686_NFIXED_SOFT_4K	(MTRR_I686_NFIXED_4K * 8)
     59 #define MTRR_I686_NFIXED_SOFT		(MTRR_I686_NFIXED * 8)
     60 
     61 #define MTRR_I686_ENABLE_MASK	0x0800
     62 #define MTRR_I686_FIXED_ENABLE_MASK	0x0400
     63 
     64 #define MTRR_I686_CAP_VCNT_MASK	0x00ff
     65 #define MTRR_I686_CAP_FIX_MASK	0x0100
     66 #define MTRR_I686_CAP_WC_MASK	0x0400
     67 
     68 #define MTRR_TYPE_UC		0
     69 #define MTRR_TYPE_WC		1
     70 #define MTRR_TYPE_UNDEF1	2
     71 #define MTRR_TYPE_UNDEF2	3
     72 #define MTRR_TYPE_WT		4
     73 #define MTRR_TYPE_WP		5
     74 #define MTRR_TYPE_WB		6
     75 
     76 struct mtrr_state {
     77 	uint32_t msraddr;
     78 	uint64_t msrval;
     79 };
     80 
     81 #define MTRR_PRIVATE	0x0001		/* 'own' range, reset at exit */
     82 #define MTRR_FIXED	0x0002		/* use fixed range mtrr */
     83 #define MTRR_VALID	0x0004		/* entry is valid */
     84 
     85 #define MTRR_CANTSET	MTRR_FIXED
     86 
     87 #define MTRR_I686_MASK_VALID	(1 << 11)
     88 
     89 
     90 #ifdef _KERNEL
     91 
     92 #define mtrr_base_value(mtrrp) \
     93     (((uint64_t)(mtrrp)->base) | ((uint64_t)(mtrrp)->type))
     94 #define mtrr_mask_value(mtrrp) \
     95     ((~((mtrrp)->len - 1) & 0x0000000ffffff000))
     96 
     97 
     98 #define mtrr_len(val) \
     99     ((~((val) & 0x0000000ffffff000)+1) & 0x0000000ffffff000)
    100 #define mtrr_base(val)		((val) & 0x0000000ffffff000)
    101 #define mtrr_type(val)		((uint8_t)((val) & 0x00000000000000ff))
    102 #define mtrr_valid(val)		(((val) & MTRR_I686_MASK_VALID) != 0)
    103 
    104 struct proc;
    105 struct mtrr;
    106 
    107 void i686_mtrr_init_first(void);
    108 
    109 struct mtrr_funcs {
    110 	void (*init_cpu)(struct cpu_info *ci);
    111 	void (*reload_cpu)(struct cpu_info *ci);
    112 	void (*clean)(struct proc *p);
    113 	int (*set)(struct mtrr *, int *n, struct proc *p, int flags);
    114 	int (*get)(struct mtrr *, int *n, struct proc *p, int flags);
    115 	void (*commit)(void);
    116 	void (*dump)(const char *tag);
    117 };
    118 
    119 extern struct mtrr_funcs i686_mtrr_funcs;
    120 extern struct mtrr_funcs *mtrr_funcs;
    121 
    122 #define mtrr_init_cpu(ci)	mtrr_funcs->init_cpu(ci)
    123 #define mtrr_reload_cpu(ci)	mtrr_funcs->reload_cpu(ci)
    124 #define mtrr_clean(p)		mtrr_funcs->clean(p)
    125 #define mtrr_set(mp,n,p,f)	mtrr_funcs->set(mp,n,p,f)
    126 #define mtrr_get(mp,n,p,f)	mtrr_funcs->get(mp,n,p,f)
    127 #define mtrr_dump(s)		mtrr_funcs->dump(s)
    128 #define mtrr_commit()		mtrr_funcs->commit()
    129 
    130 #define MTRR_GETSET_USER	0x0001
    131 #define MTRR_GETSET_KERNEL	0x0002
    132 
    133 #endif /* _KERNEL */
    134 
    135 struct mtrr {
    136 	uint64_t base;		/* physical base address */
    137 	uint64_t len;
    138 	uint8_t type;
    139 	int flags;
    140 	pid_t owner;		/* valid if MTRR_PRIVATE set in flags */
    141 };
    142 
    143 #endif /* _I386_MTRR_H_ */
    144