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| 1180 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <ddi.h> |
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| 30 | #include <libc.h> |
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| 31 | #include <task.h> |
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| 32 | #include <kernel/ddi/ddi_arg.h> |
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| 33 | |||
| 34 | /** Map piece of physical memory to task. |
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| 35 | * |
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| 36 | * Caller of this function must have the CAP_MEM_MANAGER capability. |
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| 37 | * |
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| 38 | * @param id Task ID. |
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| 39 | * @param pf Physical address of the starting frame. |
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| 40 | * @param vp Virtual address of the sterting page. |
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| 41 | * @param pages Number of pages to map. |
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| 42 | * @param writable If true, the mapping will be created writable. |
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| 43 | * |
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| 44 | * @return 0 on success, EPERM if the caller lacks the CAP_MEM_MANAGER capability, |
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| 45 | * ENOENT if there is no task with specified ID and ENOMEM if there |
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| 46 | * was some problem in creating address space area. |
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| 47 | */ |
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| 48 | int map_physmem(task_id_t id, void *pf, void *vp, unsigned long pages, int writable) |
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| 49 | { |
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| 50 | task_id_t task_id; |
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| 51 | ddi_arg_t arg; |
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| 52 | |||
| 53 | arg.task_id = id; |
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| 54 | arg.phys_base = pf; |
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| 55 | arg.virt_base = vp; |
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| 56 | arg.pages = pages; |
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| 57 | arg.writable = writable; |
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| 58 | |||
| 59 | return __SYSCALL1(SYS_MAP_PHYSMEM, (sysarg_t) &arg); |
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| 60 | } |