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 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 #ifndef _SYS_XEN_MMU_H
  27 #define _SYS_XEN_MMU_H
  28 
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32 
  33 /*
  34  * Platform-dependent MMU routines and types for the hypervisor.
  35  *
  36  * WARNING: this header file is used by both dboot and i86pc, so don't go using
  37  * normal kernel headers.
  38  */
  39 
  40 #if (defined(_BOOT) && defined(_BOOT_TARGET_amd64)) || \
  41         (!defined(_BOOT) && defined(__amd64))
  42 #define __target_amd64
  43 #endif
  44 
  45 typedef uint64_t maddr_t;
  46 #define mfn_to_ma(mfn)  ((maddr_t)(mfn) << MMU_PAGESHIFT)
  47 
  48 #ifdef __xpv
  49 
  50 #ifdef __target_amd64
  51 
  52 #define IN_HYPERVISOR_VA(va) \
  53         ((va) >= HYPERVISOR_VIRT_START && (va) < HYPERVISOR_VIRT_END)
  54 
  55 #else /* __target_amd64 */
  56 
  57 #define IN_HYPERVISOR_VA(va) ((va) >= xen_virt_start)
  58 
  59 /*
  60  * Do this to help catch any uses.
  61  */
  62 #undef  HYPERVISOR_VIRT_START
  63 #undef  machine_to_phys_mapping
  64 
  65 #endif /* __target_amd64 */
  66 
  67 #undef __target_amd64
  68 
  69 paddr_t ma_to_pa(maddr_t);
  70 maddr_t pa_to_ma(paddr_t);
  71 #endif /* __xpv */
  72 
  73 extern uintptr_t xen_virt_start;
  74 extern pfn_t *mfn_to_pfn_mapping;
  75 
  76 #ifndef _BOOT
  77 
  78 /*
  79  * On the hypervisor we need:
  80  * - a way to map a machine address (ie, not pseudo-physical).
  81  * - to relocate initial hypervisor data structures into kernel VA range.
  82  * - a way to translate between physical addresses and machine addresses.
  83  * - a way to change the machine address behind a physical address.
  84  */
  85 typedef ulong_t mfn_t;
  86 extern mfn_t *mfn_list;
  87 extern mfn_t *mfn_list_pages;
  88 extern mfn_t *mfn_list_pages_page;
  89 extern ulong_t mfn_count;
  90 extern mfn_t cached_max_mfn;
  91 
  92 /*
  93  * locks for mfn_list[] and machine_to_phys_mapping[] when migration / suspend
  94  * events happen
  95  */
  96 extern void xen_block_migrate(void);
  97 extern void xen_allow_migrate(void);
  98 extern void xen_start_migrate(void);
  99 extern void xen_end_migrate(void);
 100 
 101 /*
 102  * Conversion between machine (hardware) addresses and pseudo-physical
 103  * addresses.
 104  */
 105 #ifdef __xpv
 106 pfn_t mfn_to_pfn(mfn_t);
 107 mfn_t pfn_to_mfn(pfn_t);
 108 #endif
 109 
 110 struct page;
 111 
 112 void xen_relocate_start_info(void);
 113 
 114 /*
 115  * interfaces to create/destroy pfn_t values for devices or foreign memory
 116  *
 117  * xen_assign_pfn() creates (or looks up) a local pfn value to use for things
 118  * like a foreign domain memory mfn or a device mfn.
 119  *
 120  * xen_release_pfn() destroys the association between a pfn and foreign mfn.
 121  */
 122 pfn_t xen_assign_pfn(mfn_t mfn);
 123 void xen_release_pfn(pfn_t);
 124 uint_t pfn_is_foreign(pfn_t);
 125 void reassign_pfn(pfn_t pfn, mfn_t mfn);
 126 
 127 #define MFN_INVALID     (-(mfn_t)1)
 128 
 129 #endif /* !_BOOT */
 130 
 131 #ifdef __cplusplus
 132 }
 133 #endif
 134 
 135 #endif  /* _SYS_XEN_MMU_H */