Subversion Repositories HelenOS

Rev

Rev 4153 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1896 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2006 Jakub Jermar
1896 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   EBUS 'reg' and 'ranges' properties handling.
35 
 *
36 
 */
37 
 
38 
#include <genarch/ofw/ofw_tree.h>
39 
#include <arch/memstr.h>
1911 jermar 40 
#include <arch/trap/interrupt.h>
4153 mejdrech 41 
#include <string.h>
1896 jermar 42 
#include <panic.h>
1909 jermar 43 
#include <debug.h>
1896 jermar 44 
#include <macros.h>
45 
 
1911 jermar 46 
/** Apply EBUS ranges to EBUS register. */
4153 mejdrech 47 
bool
48 
ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa)
1896 jermar 49 
{
50 
    ofw_tree_property_t *prop;
51 
    ofw_ebus_range_t *range;
52 
    count_t ranges;
53 
 
54 
    prop = ofw_tree_getprop(node, "ranges");
55 
    if (!prop)
56 
        return false;
57 
 
58 
    ranges = prop->size / sizeof(ofw_ebus_range_t);
59 
    range = prop->value;
60 
 
2745 decky 61 
    unsigned int i;
1896 jermar 62 
 
63 
    for (i = 0; i < ranges; i++) {
64 
        if (reg->space != range[i].child_space)
65 
            continue;
4153 mejdrech 66 
        if (overlaps(reg->addr, reg->size, range[i].child_base,
67 
            range[i].size)) {
1896 jermar 68 
            ofw_pci_reg_t pci_reg;
69 
 
70 
            pci_reg.space = range[i].parent_space;
4153 mejdrech 71 
            pci_reg.addr = range[i].parent_base +
72 
                (reg->addr - range[i].child_base);
1896 jermar 73 
            pci_reg.size = reg->size;
74 
 
75 
            return ofw_pci_apply_ranges(node->parent, &pci_reg, pa);
76 
        }
77 
    }
78 
 
79 
    return false;
80 
}
81 
 
4153 mejdrech 82 
bool
83 
ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg,
84 
    uint32_t interrupt, int *inr, cir_t *cir, void **cir_arg)
1909 jermar 85 
{
86 
    ofw_tree_property_t *prop;
87 
    ofw_tree_node_t *controller;
88 
 
89 
    prop = ofw_tree_getprop(node, "interrupt-map");
90 
    if (!prop || !prop->value)
91 
        return false;
92 
 
93 
    ofw_ebus_intr_map_t *intr_map = prop->value;
94 
    count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
95 
 
96 
    ASSERT(count);
97 
 
98 
    prop = ofw_tree_getprop(node, "interrupt-map-mask");
99 
    if (!prop || !prop->value)
100 
        return false;
101 
 
102 
    ofw_ebus_intr_mask_t *intr_mask = prop->value;
103 
 
104 
    ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
105 
 
106 
    uint32_t space = reg->space & intr_mask->space_mask;
107 
    uint32_t addr = reg->addr & intr_mask->addr_mask;
108 
    uint32_t intr = interrupt & intr_mask->intr_mask;
109 
 
2745 decky 110 
    unsigned int i;
1909 jermar 111 
    for (i = 0; i < count; i++) {
4153 mejdrech 112 
        if ((intr_map[i].space == space) &&
113 
            (intr_map[i].addr == addr) && (intr_map[i].intr == intr))
1909 jermar 114 
            goto found;
115 
    }
116 
    return false;
117 
 
118 
found:
119 
    /*
120 
     * We found the device that functions as an interrupt controller
4153 mejdrech 121 
     * for the interrupt. We also found partial mapping from interrupt to
122 
     * INO.
1909 jermar 123 
     */
124 
 
4153 mejdrech 125 
    controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"),
126 
        intr_map[i].controller_handle);
1911 jermar 127 
    if (!controller)
128 
        return false;
129 
 
4263 mejdrech 130 
    if (str_cmp(ofw_tree_node_name(controller), "pci") != 0) {
1911 jermar 131 
        /*
132 
         * This is not a PCI node.
133 
         */
134 
        return false;
135 
    }
136 
 
1912 jermar 137 
    /*
138 
     * Let the PCI do the next step in mapping the interrupt.
139 
     */
4153 mejdrech 140 
    if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino,
141 
        inr, cir, cir_arg))
1912 jermar 142 
        return false;
1911 jermar 143 
 
1909 jermar 144 
    return true;
145 
}
146 
 
1896 jermar 147 
/** @}
148 
 */