Subversion Repositories HelenOS

Rev

Rev 3386 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3386 Rev 4153
Line 1... Line 1...
1 
/*
 1 
/*
2 
 * Copyright (c) 2006 Jakub Jermar
 2 
 * Copyright (c) 2006 Jakub Jermar
- 
 
 3 
 * Copyright (c) 2008 Jakub vana
3 
 * All rights reserved.
 4 
 * All rights reserved.
4 
 *
 5 
 *
5 
 * Redistribution and use in source and binary forms, with or without
 6 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
 7 
 * modification, are permitted provided that the following conditions
7 
 * are met:
 8 
 * are met:
Line 33... Line 34...
33 
 */
 34 
 */
34 
 
 35 
 
35 
#include <ddi/ddi.h>
 36 
#include <ddi/ddi.h>
36 
#include <proc/task.h>
 37 
#include <proc/task.h>
37 
#include <arch/types.h>
 38 
#include <arch/types.h>
- 
 
 39 
#include <mm/slab.h>
- 
 
 40 
#include <errno.h>
- 
 
 41 
 
- 
 
 42 
#define IO_MEMMAP_PAGES 16384
- 
 
 43 
#define PORTS_PER_PAGE  4
38 
 
 44 
 
39 
/** Enable I/O space range for task.
 45 
/** Enable I/O space range for task.
40 
 *
 46 
 *
41 
 * Interrupts are disabled and task is locked.
 47 
 * Interrupts are disabled and task is locked.
42 
 *
 48 
 *
43 
 * @param task Task.
 49 
 * @param task      Task.
44 
 * @param ioaddr Startign I/O space address.
 50 
 * @param ioaddr    Starting I/O space address.
45 
 * @param size Size of the enabled I/O range.
 51 
 * @param size      Size of the enabled I/O range.
46 
 *
 52 
 *
47 
 * @return 0 on success or an error code from errno.h.
 53 
 * @return 0 on success or an error code from errno.h.
48 
 */
 54 
 */
49 
int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
 55 
int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
50 
{
 56 
{
- 
 
 57 
    if (!task->arch.iomap) {
- 
 
 58 
        uint8_t *map;
- 
 
 59 
 
- 
 
 60 
        task->arch.iomap = malloc(sizeof(bitmap_t), 0);
- 
 
 61 
        map = malloc(BITS2BYTES(IO_MEMMAP_PAGES), 0);
- 
 
 62 
        if(!map)
- 
 
 63 
            return ENOMEM;
- 
 
 64 
        bitmap_initialize(task->arch.iomap, map, IO_MEMMAP_PAGES);
- 
 
 65 
        bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES);
- 
 
 66 
    }
- 
 
 67 
   
- 
 
 68 
    uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
- 
 
 69 
    size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE);
- 
 
 70 
    bitmap_set_range(task->arch.iomap, iopage, size / 4);
- 
 
 71 
 
51 
    return 0;
 72 
    return 0;
52 
}
 73 
}
53 
 
 74 
 
54 
/** @}
 75 
/** @}
55 
 */
 76 
 */