usr/src/uts/common/vm/seg_kpm.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _VM_SEG_KPM_H
  27 #define _VM_SEG_KPM_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /*
  34  * Kernel Physical Mapping (segkpm) segment driver.
  35  */
  36
  37 #include <vm/kpm.h>
  38
  39 struct segkpm_data {
  40         ushort_t *skd_va_select; /* page_create_va kpm vaddr bin count */
  41         short    skd_nvcolors;   /* VAC colors to deal with */
  42         uchar_t  skd_prot;
  43 };
  44
  45 /*
  46  * segkpm create needs some platform knowledge
  47  */
  48 struct segkpm_crargs {
  49         uint_t  prot;
  50         short   nvcolors;       /* VAC # virtual colors, 0 for PAC. */
  51 };
  52
  53 extern struct seg *segkpm;
  54 extern u_offset_t kpm_pgoff;
  55 extern size_t   kpm_pgsz;
  56 extern uint_t   kpm_pgshft;
  57 extern uint_t   kpmp2pshft;
  58 extern pgcnt_t  kpmpnpgs;
  59
  60 /* kpm controls */
  61 extern int      kpm_enable;
  62 extern int      kpm_smallpages;
  63 extern int      segmap_kpm;
  64
  65 /*
  66  * kpm_page_t macros:
  67  * . bytes (b) to kpm pages (kpmp)
  68  * . pages (p) to kpm pages (kpmp), and back (with and without roundup)
  69  * . kpm page offset in bytes
  70  * . pages (p) modulo kpm pages (kpmp)
  71  */
  72 #define btokpmp(x)      ((x) >> kpm_pgshft)
  73 #define btokpmpr(x)     (((x) + kpm_pgoff) >> kpm_pgshft)
  74 #define ptokpmp(x)      ((x) >> kpmp2pshft)
  75 #define ptokpmpr(x)     (((x) + (kpmpnpgs - 1)) >> kpmp2pshft)
  76 #define kpmptop(x)      ((x) << kpmp2pshft)
  77 #define kpmpageoff(x)   ((x) & kpm_pgoff)
  78 #define pmodkpmp(x)     ((x) & (kpmpnpgs - 1))
  79
  80 #ifdef  SEGKPM_SUPPORT
  81
  82 #define IS_KPM_ADDR(addr) \
  83         ((addr) >= segkpm->s_base && (addr) < (segkpm->s_base + segkpm->s_size))
  84
  85 #ifdef  __x86
  86 /* x86 systems use neither kpm_page_t nor kpm_spage_t when supporting kpm. */
  87 #define KPMPAGE_T_SZ    (0)
  88 #else   /* __x86 */
  89 #define KPMPAGE_T_SZ \
  90         ((kpm_smallpages == 0) ? sizeof (kpm_page_t) : sizeof (kpm_spage_t))
  91 #endif  /* __x86 */
  92
  93 #else   /* SEGKPM_SUPPORT */
  94
  95 #define IS_KPM_ADDR(addr) (segkpm != NULL)
  96 #define KPMPAGE_T_SZ    (0)
  97
  98 #endif  /* SEGKPM_SUPPORT */
  99
 100 #ifdef _KERNEL
 101 /*
 102  * Public seg_kpm segment operations.
 103  */
 104 extern int              segkpm_create(struct seg *, void *);
 105 extern faultcode_t      segkpm_fault(struct hat *, struct seg *, caddr_t,
 106                                 size_t, enum fault_type, enum seg_rw);
 107
 108 /*
 109  * Public seg_kpm interfaces.
 110  */
 111 extern caddr_t  segkpm_create_va(u_offset_t);
 112 extern void     segkpm_mapout_validkpme(struct kpme *);
 113
 114 #endif  /* _KERNEL */
 115
 116 #ifdef  __cplusplus
 117 }
 118 #endif
 119
 120 #endif  /* _VM_SEG_KPM_H */