OvmfPkg/Include/IndustryStandard/Xen/memory.h

/******************************************************************************
 * memory.h
 *
 * Memory reservation and information.
 *
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
 */

#ifndef __XEN_PUBLIC_MEMORY_H__
#define __XEN_PUBLIC_MEMORY_H__

#include "xen.h"

/* Source mapping space. */
/* ` enum phys_map_space { */
#define XENMAPSPACE_shared_info   0 /* shared info page */
#define XENMAPSPACE_grant_table   1 /* grant table page */
#define XENMAPSPACE_gmfn          2 /* GMFN */
#define XENMAPSPACE_gmfn_range    3 /* GMFN range, XENMEM_add_to_physmap only. */
#define XENMAPSPACE_gmfn_foreign  4 /* GMFN from another dom,
                                    * XENMEM_add_to_physmap_batch only. */
/* ` } */

/*
 * Sets the GPFN at which a particular page appears in the specified guest's
 * pseudophysical address space.
 * arg == addr of xen_add_to_physmap_t.
 */
#define XENMEM_add_to_physmap  7
struct xen_add_to_physmap {
  /* Which domain to change the mapping for. */
  domid_t        domid;

  /* Number of pages to go through for gmfn_range */
  UINT16         size;

  UINT32         space; /* => enum phys_map_space */

  #define XENMAPIDX_grant_table_status  0x80000000

  /* Index into space being mapped. */
  xen_ulong_t    idx;

  /* GPFN in domid where the source mapping page should appear. */
  xen_pfn_t      gpfn;
};

typedef struct xen_add_to_physmap xen_add_to_physmap_t;
DEFINE_XEN_GUEST_HANDLE (xen_add_to_physmap_t);

/*
 * Unmaps the page appearing at a particular GPFN from the specified guest's
 * pseudophysical address space.
 * arg == addr of xen_remove_from_physmap_t.
 */
#define XENMEM_remove_from_physmap  15
struct xen_remove_from_physmap {
  /* Which domain to change the mapping for. */
  domid_t      domid;

  /* GPFN of the current mapping of the page. */
  xen_pfn_t    gpfn;
};

typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
DEFINE_XEN_GUEST_HANDLE (xen_remove_from_physmap_t);

/*
 * Returns the pseudo-physical memory map as it was when the domain
 * was started (specified by XENMEM_set_memory_map).
 * arg == addr of xen_memory_map_t.
 */
#define XENMEM_memory_map  9
struct xen_memory_map {
  /*
   * On call the number of entries which can be stored in buffer. On
   * return the number of entries which have been stored in
   * buffer.
   */
  UINT32    nr_entries;

  /*
   * Entries in the buffer are in the same format as returned by the
   * BIOS INT 0x15 EAX=0xE820 call.
   */
  XEN_GUEST_HANDLE (void) buffer;
};

typedef struct xen_memory_map xen_memory_map_t;
DEFINE_XEN_GUEST_HANDLE (xen_memory_map_t);

#endif /* __XEN_PUBLIC_MEMORY_H__ */

/*
 * Local variables:
 * mode: C
 * c-file-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */