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  1. /*
  2.  * Copyright (C) 2006 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <ddi.h>
  30. #include <libc.h>
  31. #include <task.h>
  32. #include <kernel/ddi/ddi_arg.h>
  33.  
  34. /** Map piece of physical memory to task.
  35.  *
  36.  * Caller of this function must have the CAP_MEM_MANAGER capability.
  37.  *
  38.  * @param id Task ID.
  39.  * @param pf Physical address of the starting frame.
  40.  * @param vp Virtual address of the sterting page.
  41.  * @param pages Number of pages to map.
  42.  * @param writable If true, the mapping will be created writable.
  43.  *
  44.  * @return 0 on success, EPERM if the caller lacks the CAP_MEM_MANAGER capability,
  45.  *     ENOENT if there is no task with specified ID and ENOMEM if there
  46.  *     was some problem in creating address space area.
  47.  */
  48. int map_physmem(task_id_t id, void *pf, void *vp, unsigned long pages, int writable)
  49. {
  50.     task_id_t task_id;
  51.     ddi_arg_t arg;
  52.  
  53.     arg.task_id = id;
  54.     arg.phys_base = pf;
  55.     arg.virt_base = vp;
  56.     arg.pages = pages;
  57.     arg.writable = writable;
  58.  
  59.     return __SYSCALL1(SYS_MAP_PHYSMEM, (sysarg_t) &arg);
  60. }
  61.