OvmfPkg/Include/IndustryStandard/Xen/memory.h

   1 /******************************************************************************
   2  * memory.h
   3  *
   4  * Memory reservation and information.
   5  *
   6  * SPDX-License-Identifier: MIT
   7  *
   8  * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
   9  */
  10
  11 #ifndef __XEN_PUBLIC_MEMORY_H__
  12 #define __XEN_PUBLIC_MEMORY_H__
  13
  14 #include "xen.h"
  15
  16 /* Source mapping space. */
  17 /* ` enum phys_map_space { */
  18 #define XENMAPSPACE_shared_info  0 /* shared info page */
  19 #define XENMAPSPACE_grant_table  1 /* grant table page */
  20 #define XENMAPSPACE_gmfn         2 /* GMFN */
  21 #define XENMAPSPACE_gmfn_range   3 /* GMFN range, XENMEM_add_to_physmap only. */
  22 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
  23                                     * XENMEM_add_to_physmap_batch only. */
  24 /* ` } */
  25
  26 /*
  27  * Sets the GPFN at which a particular page appears in the specified guest's
  28  * pseudophysical address space.
  29  * arg == addr of xen_add_to_physmap_t.
  30  */
  31 #define XENMEM_add_to_physmap      7
  32 struct xen_add_to_physmap {
  33     /* Which domain to change the mapping for. */
  34     domid_t domid;
  35
  36     /* Number of pages to go through for gmfn_range */
  37     UINT16    size;
  38
  39     UINT32 space; /* => enum phys_map_space */
  40
  41 #define XENMAPIDX_grant_table_status 0x80000000
  42
  43     /* Index into space being mapped. */
  44     xen_ulong_t idx;
  45
  46     /* GPFN in domid where the source mapping page should appear. */
  47     xen_pfn_t     gpfn;
  48 };
  49 typedef struct xen_add_to_physmap xen_add_to_physmap_t;
  50 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
  51
  52 /*
  53  * Unmaps the page appearing at a particular GPFN from the specified guest's
  54  * pseudophysical address space.
  55  * arg == addr of xen_remove_from_physmap_t.
  56  */
  57 #define XENMEM_remove_from_physmap      15
  58 struct xen_remove_from_physmap {
  59     /* Which domain to change the mapping for. */
  60     domid_t domid;
  61
  62     /* GPFN of the current mapping of the page. */
  63     xen_pfn_t     gpfn;
  64 };
  65 typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
  66 DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
  67
  68 /*
  69  * Returns the pseudo-physical memory map as it was when the domain
  70  * was started (specified by XENMEM_set_memory_map).
  71  * arg == addr of xen_memory_map_t.
  72  */
  73 #define XENMEM_memory_map           9
  74 struct xen_memory_map {
  75     /*
  76      * On call the number of entries which can be stored in buffer. On
  77      * return the number of entries which have been stored in
  78      * buffer.
  79      */
  80     UINT32 nr_entries;
  81
  82     /*
  83      * Entries in the buffer are in the same format as returned by the
  84      * BIOS INT 0x15 EAX=0xE820 call.
  85      */
  86     XEN_GUEST_HANDLE(void) buffer;
  87 };
  88 typedef struct xen_memory_map xen_memory_map_t;
  89 DEFINE_XEN_GUEST_HANDLE(xen_memory_map_t);
  90
  91 #endif /* __XEN_PUBLIC_MEMORY_H__ */
  92
  93 /*
  94  * Local variables:
  95  * mode: C
  96  * c-file-style: "BSD"
  97  * c-basic-offset: 4
  98  * tab-width: 4
  99  * indent-tabs-mode: nil
 100  * End:
 101  */