Subversion Repositories HelenOS

Rev

Rev 2745 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2510 jermar 1
/*
2
 * Copyright (c) 2007 Jakub Jermar
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup ofw
30
 * @{
31
 */
32
/**
33
 * @file
34
 * @brief   SBUS 'reg' and 'ranges' properties handling.
35
 *
36
 */
37
 
38
#include <genarch/ofw/ofw_tree.h>
39
#include <macros.h>
40
 
41
bool ofw_sbus_apply_ranges(ofw_tree_node_t *node, ofw_sbus_reg_t *reg,
42
    uintptr_t *pa)
43
{
44
    ofw_tree_property_t *prop;
45
    ofw_sbus_range_t *range;
4490 decky 46
    size_t ranges;
2510 jermar 47
 
48
    /*
49
     * The SBUS support is very rudimentary in that we simply assume
50
     * that the SBUS bus in question is connected directly to the UPA bus.
51
     * Should we come across configurations that need more robust support,
52
     * the driver will have to be extended to handle different topologies.
53
     */
54
    if (!node->parent || node->parent->parent)
55
        return false;
56
 
57
    prop = ofw_tree_getprop(node, "ranges");
58
    if (!prop)
59
        return false;
60
 
61
    ranges = prop->size / sizeof(ofw_sbus_range_t);
62
    range = prop->value;
63
 
2745 decky 64
    unsigned int i;
2510 jermar 65
 
66
    for (i = 0; i < ranges; i++) {
67
        if (overlaps(reg->addr, reg->size, range[i].child_base,
68
            range[i].size)) {
69
            *pa = range[i].parent_base +
70
                (reg->addr - range[i].child_base);
71
            return true;
72
        }
73
    }
74
 
75
    return false;
76
}
77
 
78
/** @}
79
 */