xen-mapcache.h

   1 /*
   2  * Copyright (C) 2011       Citrix Ltd.
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2.  See
   5  * the COPYING file in the top-level directory.
   6  *
   7  */
   8
   9 #ifndef XEN_MAPCACHE_H
  10 #define XEN_MAPCACHE_H
  11
  12 #include <sys/mman.h>
  13 #include "trace.h"
  14
  15 void     qemu_map_cache_init(void);
  16 uint8_t  *qemu_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, uint8_t lock);
  17 ram_addr_t qemu_ram_addr_from_mapcache(void *ptr);
  18 void     qemu_invalidate_entry(uint8_t *buffer);
  19 void     qemu_invalidate_map_cache(void);
  20
  21 uint8_t *xen_map_block(target_phys_addr_t phys_addr, target_phys_addr_t size);
  22
  23 static inline void xen_unmap_block(void *addr, ram_addr_t size)
  24 {
  25     trace_xen_unmap_block(addr, size);
  26
  27     if (munmap(addr, size) != 0) {
  28         hw_error("xen_unmap_block: %s", strerror(errno));
  29     }
  30 }
  31
  32
  33 #define mapcache_lock()   ((void)0)
  34 #define mapcache_unlock() ((void)0)
  35
  36 #endif /* !XEN_MAPCACHE_H */