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| Rev | Author | Line No. | Line |
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| 1191 | 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/ddi.h> |
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| 30 | #include <proc/task.h> |
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| 31 | #include <arch/types.h> |
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| 32 | #include <typedefs.h> |
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| 1203 | jermar | 33 | #include <adt/bitmap.h> |
| 34 | #include <mm/slab.h> |
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| 35 | #include <arch/pm.h> |
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| 36 | #include <errno.h> |
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| 1191 | jermar | 37 | |
| 38 | /** Enable I/O space range for task. |
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| 39 | * |
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| 40 | * Interrupts are disabled and task is locked. |
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| 41 | * |
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| 42 | * @param task Task. |
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| 43 | * @param ioaddr Startign I/O space address. |
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| 44 | * @param size Size of the enabled I/O range. |
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| 45 | * |
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| 46 | * @return 0 on success or an error code from errno.h. |
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| 47 | */ |
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| 48 | int ddi_enable_iospace_arch(task_t *task, __address ioaddr, size_t size) |
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| 49 | { |
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| 1203 | jermar | 50 | count_t bits; |
| 51 | |||
| 52 | bits = ioaddr + size; |
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| 53 | if (bits > IO_PORTS) |
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| 54 | return ENOENT; |
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| 55 | |||
| 56 | if (task->arch.iomap.bits < bits) { |
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| 57 | bitmap_t oldiomap; |
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| 58 | __u8 *newmap; |
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| 59 | |||
| 60 | /* |
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| 61 | * The I/O permission bitmap is too small and needs to be grown. |
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| 62 | */ |
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| 63 | |||
| 64 | newmap = (__u8 *) malloc(BITS2BYTES(bits), FRAME_ATOMIC); |
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| 65 | if (!newmap) |
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| 66 | return ENOMEM; |
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| 67 | |||
| 68 | bitmap_initialize(&oldiomap, task->arch.iomap.map, task->arch.iomap.bits); |
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| 69 | bitmap_initialize(&task->arch.iomap, newmap, bits); |
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| 70 | |||
| 71 | /* |
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| 72 | * Mark the new range inaccessible. |
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| 73 | */ |
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| 74 | bitmap_set_range(&task->arch.iomap, oldiomap.bits, bits - oldiomap.bits); |
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| 75 | |||
| 76 | /* |
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| 77 | * In case there really existed smaller iomap, |
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| 78 | * copy its contents and deallocate it. |
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| 79 | */ |
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| 80 | if (oldiomap.bits) { |
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| 81 | bitmap_copy(&task->arch.iomap, &oldiomap, task->arch.iomap.bits); |
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| 82 | free(oldiomap.map); |
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| 83 | } |
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| 84 | } |
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| 85 | |||
| 86 | /* |
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| 87 | * Enable the range and we are done. |
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| 88 | */ |
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| 89 | bitmap_clear_range(&task->arch.iomap, (index_t) ioaddr, (count_t) size); |
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| 90 | |||
| 1191 | jermar | 91 | return 0; |
| 92 | } |