Subversion Repositories HelenOS

Rev

Rev 2927 | Rev 4339 | 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   PCI 'reg' and 'ranges' properties handling.
35 
 *
36 
 */
37 
 
38 
#include <genarch/ofw/ofw_tree.h>
1912 jermar 39 
#include <arch/drivers/pci.h>
40 
#include <arch/trap/interrupt.h>
1896 jermar 41 
#include <arch/memstr.h>
42 
#include <func.h>
43 
#include <panic.h>
44 
#include <macros.h>
45 
 
1897 jermar 46 
#define PCI_SPACE_MASK      0x03000000
47 
#define PCI_ABS_MASK        0x80000000 
48 
#define PCI_REG_MASK        0x000000ff
1896 jermar 49 
 
1912 jermar 50 
#define PCI_IGN         0x1f
51 
 
3674 svoboda 52 
bool
53 
ofw_pci_apply_ranges(ofw_tree_node_t *node, ofw_pci_reg_t *reg, uintptr_t *pa)
1896 jermar 54 
{
55 
    ofw_tree_property_t *prop;
56 
    ofw_pci_range_t *range;
57 
    count_t ranges;
58 
 
59 
    prop = ofw_tree_getprop(node, "ranges");
60 
    if (!prop) {
61 
        if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0)
62 
            return ofw_pci_apply_ranges(node->parent, reg, pa);
63 
        return false;
64 
    }
65 
 
66 
    ranges = prop->size / sizeof(ofw_pci_range_t);
67 
    range = prop->value;
68 
 
2745 decky 69 
    unsigned int i;
1896 jermar 70 
 
71 
    for (i = 0; i < ranges; i++) {
3674 svoboda 72 
        if ((reg->space & PCI_SPACE_MASK) !=
73 
            (range[i].space & PCI_SPACE_MASK))
1896 jermar 74 
            continue;
3674 svoboda 75 
        if (overlaps(reg->addr, reg->size, range[i].child_base,
76 
            range[i].size)) {
77 
            *pa = range[i].parent_base +
78 
                (reg->addr - range[i].child_base);
1896 jermar 79 
            return true;
80 
        }
81 
    }
82 
 
83 
    return false;
84 
}
85 
 
3674 svoboda 86 
bool
87 
ofw_pci_reg_absolutize(ofw_tree_node_t *node, ofw_pci_reg_t *reg,
88 
    ofw_pci_reg_t *out)
1897 jermar 89 
{
90 
    if (reg->space & PCI_ABS_MASK) {
91 
        /* already absolute */
92 
        out->space = reg->space;
93 
        out->addr = reg->addr;
94 
        out->size = reg->size;
95 
        return true;
96 
    }
97 
 
98 
    ofw_tree_property_t *prop;
99 
    ofw_pci_reg_t *assigned_address;
100 
    count_t assigned_addresses;
101 
 
102 
    prop = ofw_tree_getprop(node, "assigned-addresses");
103 
    if (!prop)
104 
        panic("Can't find \"assigned-addresses\" property.\n");
105 
 
106 
    assigned_addresses = prop->size / sizeof(ofw_pci_reg_t);
107 
    assigned_address = prop->value;
108 
 
2745 decky 109 
    unsigned int i;
1897 jermar 110 
 
111 
    for (i = 0; i < assigned_addresses; i++) {
3674 svoboda 112 
        if ((assigned_address[i].space & PCI_REG_MASK) ==
113 
            (reg->space & PCI_REG_MASK)) {
1897 jermar 114 
            out->space = assigned_address[i].space;
115 
            out->addr = reg->addr + assigned_address[i].addr;
116 
            out->size = reg->size;
117 
            return true;
118 
        }
119 
    }
120 
 
121 
    return false;
122 
}
123 
 
1912 jermar 124 
/** Map PCI interrupt.
125 
 *
126 
 * So far, we only know how to map interrupts of non-PCI devices connected
127 
 * to a PCI bridge.
128 
 */
3674 svoboda 129 
bool
130 
ofw_pci_map_interrupt(ofw_tree_node_t *node, ofw_pci_reg_t *reg, int ino,
131 
    int *inr, cir_t *cir, void **cir_arg)
1912 jermar 132 
{
133 
    pci_t *pci = node->device;
134 
    if (!pci) {
135 
        pci = pci_init(node);
136 
        if (!pci)
137 
            return false;
138 
        node->device = pci;
139 
    }
140 
 
141 
    pci_enable_interrupt(pci, ino);
142 
 
143 
    *inr = (PCI_IGN << IGN_SHIFT) | ino;
3674 svoboda 144 
    *cir = pci_clear_interrupt;
145 
    *cir_arg = pci;
1912 jermar 146 
 
147 
    return true;
148 
}
149 
 
1896 jermar 150 
/** @}
151 
 */