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
  50 typedef struct xen_add_to_physmap xen_add_to_physmap_t;
  51 DEFINE_XEN_GUEST_HANDLE (xen_add_to_physmap_t);
  52
  53 /*
  54  * Unmaps the page appearing at a particular GPFN from the specified guest's
  55  * pseudophysical address space.
  56  * arg == addr of xen_remove_from_physmap_t.
  57  */
  58 #define XENMEM_remove_from_physmap  15
  59 struct xen_remove_from_physmap {
  60   /* Which domain to change the mapping for. */
  61   domid_t      domid;
  62
  63   /* GPFN of the current mapping of the page. */
  64   xen_pfn_t    gpfn;
  65 };
  66
  67 typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
  68 DEFINE_XEN_GUEST_HANDLE (xen_remove_from_physmap_t);
  69
  70 /*
  71  * Returns the pseudo-physical memory map as it was when the domain
  72  * was started (specified by XENMEM_set_memory_map).
  73  * arg == addr of xen_memory_map_t.
  74  */
  75 #define XENMEM_memory_map  9
  76 struct xen_memory_map {
  77   /*
  78    * On call the number of entries which can be stored in buffer. On
  79    * return the number of entries which have been stored in
  80    * buffer.
  81    */
  82   UINT32    nr_entries;
  83
  84   /*
  85    * Entries in the buffer are in the same format as returned by the
  86    * BIOS INT 0x15 EAX=0xE820 call.
  87    */
  88   XEN_GUEST_HANDLE (void) buffer;
  89 };
  90
  91 typedef struct xen_memory_map xen_memory_map_t;
  92 DEFINE_XEN_GUEST_HANDLE (xen_memory_map_t);
  93
  94 #endif /* __XEN_PUBLIC_MEMORY_H__ */
  95
  96 /*
  97  * Local variables:
  98  * mode: C
  99  * c-file-style: "BSD"
 100  * c-basic-offset: 4
 101  * tab-width: 4
 102  * indent-tabs-mode: nil
 103  * End:
 104  */