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      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