| 1 | /*
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| 2 | * Copyright (c) 2006 Jakub Jermar
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| 3 | * Copyright (c) 2008 Jakub vana
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup ia64ddi
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| 31 | * @{
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| 32 | */
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| 33 | /** @file
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| 34 | */
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| 35 |
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| 36 | #include <ddi/ddi.h>
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| 37 | #include <proc/task.h>
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| 38 | #include <typedefs.h>
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| 39 | #include <mm/slab.h>
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| 40 | #include <errno.h>
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| 41 |
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| 42 | #define IO_MEMMAP_PAGES 16384
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| 43 | #define PORTS_PER_PAGE 4
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| 44 |
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| 45 | /** Enable I/O space range for task.
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| 46 | *
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| 47 | * Interrupts are disabled and task is locked.
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| 48 | *
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| 49 | * @param task Task.
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| 50 | * @param ioaddr Starting I/O space address.
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| 51 | * @param size Size of the enabled I/O range.
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| 52 | *
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| 53 | * @return 0 on success or an error code from errno.h.
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| 54 | */
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| 55 | int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
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| 56 | {
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| 57 | if (!task->arch.iomap) {
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| 58 | uint8_t *map;
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| 59 |
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| 60 | task->arch.iomap = malloc(sizeof(bitmap_t), 0);
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| 61 | map = malloc(BITS2BYTES(IO_MEMMAP_PAGES), 0);
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| 62 | if(!map)
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| 63 | return ENOMEM;
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| 64 | bitmap_initialize(task->arch.iomap, map, IO_MEMMAP_PAGES);
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| 65 | bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES);
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| 66 | }
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| 67 |
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| 68 | uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
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| 69 | size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE);
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| 70 | bitmap_set_range(task->arch.iomap, iopage, size / 4);
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| 71 |
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| 72 | return 0;
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| 73 | }
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| 74 |
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| 75 | /** @}
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| 76 | */
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