Subversion Repositories HelenOS

Rev

Rev 3675 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3675 Rev 4377
Line 1... Line 1...
1
/*
1
/*
2
 * Copyright (c) 2006 Jakub Jermar, Jakub vana
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 36... Line 37...
36
#include <proc/task.h>
37
#include <proc/task.h>
37
#include <arch/types.h>
38
#include <arch/types.h>
38
#include <mm/slab.h>
39
#include <mm/slab.h>
39
#include <errno.h>
40
#include <errno.h>
40
 
41
 
41
#define IO_MEMMAP_PAGES 16384
42
#define IO_MEMMAP_PAGES 16384
42
#define PORTS_PER_PAGE 4
43
#define PORTS_PER_PAGE  4
43
 
44
 
44
/** Enable I/O space range for task.
45
/** Enable I/O space range for task.
45
 *
46
 *
46
 * Interrupts are disabled and task is locked.
47
 * Interrupts are disabled and task is locked.
47
 *
48
 *
48
 * @param task Task.
49
 * @param task      Task.
49
 * @param ioaddr Startign I/O space address.
50
 * @param ioaddr    Starting I/O space address.
50
 * @param size Size of the enabled I/O range.
51
 * @param size      Size of the enabled I/O range.
51
 *
52
 *
52
 * @return 0 on success or an error code from errno.h.
53
 * @return 0 on success or an error code from errno.h.
53
 */
54
 */
54
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)
55
{
56
{
56
 
-
 
57
    if(!task->arch.iomap)
57
    if (!task->arch.iomap) {
58
    {
-
 
59
        uint8_t *map;
58
        uint8_t *map;
-
 
59
 
60
        task->arch.iomap=malloc(sizeof(bitmap_t),0);
60
        task->arch.iomap = malloc(sizeof(bitmap_t), 0);
61
        map=malloc(BITS2BYTES(IO_MEMMAP_PAGES),0);
61
        map = malloc(BITS2BYTES(IO_MEMMAP_PAGES), 0);
62
        if(!map)
62
        if(!map)
63
            return ENOMEM;
63
            return ENOMEM;
64
        bitmap_initialize(task->arch.iomap,map,IO_MEMMAP_PAGES);   
64
        bitmap_initialize(task->arch.iomap, map, IO_MEMMAP_PAGES);
65
        bitmap_clear_range(task->arch.iomap,0,IO_MEMMAP_PAGES);
65
        bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES);
66
    }
66
    }
67
   
67
   
68
    uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
68
    uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
69
    size = ALIGN_UP (size+ioaddr-4*iopage,PORTS_PER_PAGE);
69
    size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE);
70
    bitmap_set_range(task->arch.iomap,iopage,size/4);
70
    bitmap_set_range(task->arch.iomap, iopage, size / 4);
71
 
-
 
72
 
71
 
73
    return 0;
72
    return 0;
74
}
73
}
75
 
74
 
76
/** @}
75
/** @}