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 */ 136