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      1 /******************************************************************************
      2  * memory.h
      3  *
      4  * Memory reservation and information.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a copy
      7  * of this software and associated documentation files (the "Software"), to
      8  * deal in the Software without restriction, including without limitation the
      9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
     10  * sell copies of the Software, and to permit persons to whom the Software is
     11  * furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  *
     24  * Copyright (c) 2005, Keir Fraser <keir (at) xensource.com>
     25  */
     26 
     27 #ifndef __XEN_PUBLIC_MEMORY_H__
     28 #define __XEN_PUBLIC_MEMORY_H__
     29 
     30 #include "xen.h"
     31 
     32 /* Source mapping space. */
     33 /* ` enum phys_map_space { */
     34 #define XENMAPSPACE_shared_info  0 /* shared info page */
     35 #define XENMAPSPACE_grant_table  1 /* grant table page */
     36 #define XENMAPSPACE_gmfn         2 /* GMFN */
     37 #define XENMAPSPACE_gmfn_range   3 /* GMFN range, XENMEM_add_to_physmap only. */
     38 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
     39                                     * XENMEM_add_to_physmap_batch only. */
     40 /* ` } */
     41 
     42 /*
     43  * Sets the GPFN at which a particular page appears in the specified guest's
     44  * pseudophysical address space.
     45  * arg == addr of xen_add_to_physmap_t.
     46  */
     47 #define XENMEM_add_to_physmap      7
     48 struct xen_add_to_physmap {
     49     /* Which domain to change the mapping for. */
     50     domid_t domid;
     51 
     52     /* Number of pages to go through for gmfn_range */
     53     UINT16    size;
     54 
     55     UINT32 space; /* => enum phys_map_space */
     56 
     57 #define XENMAPIDX_grant_table_status 0x80000000
     58 
     59     /* Index into space being mapped. */
     60     xen_ulong_t idx;
     61 
     62     /* GPFN in domid where the source mapping page should appear. */
     63     xen_pfn_t     gpfn;
     64 };
     65 typedef struct xen_add_to_physmap xen_add_to_physmap_t;
     66 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
     67 
     68 /*
     69  * Unmaps the page appearing at a particular GPFN from the specified guest's
     70  * pseudophysical address space.
     71  * arg == addr of xen_remove_from_physmap_t.
     72  */
     73 #define XENMEM_remove_from_physmap      15
     74 struct xen_remove_from_physmap {
     75     /* Which domain to change the mapping for. */
     76     domid_t domid;
     77 
     78     /* GPFN of the current mapping of the page. */
     79     xen_pfn_t     gpfn;
     80 };
     81 typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
     82 DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
     83 
     84 #endif /* __XEN_PUBLIC_MEMORY_H__ */
     85 
     86 /*
     87  * Local variables:
     88  * mode: C
     89  * c-file-style: "BSD"
     90  * c-basic-offset: 4
     91  * tab-width: 4
     92  * indent-tabs-mode: nil
     93  * End:
     94  */
     95