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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Jakub Jermar |
2 | * Copyright (c) 2007 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ofw |
29 | /** @addtogroup ofw |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief SBUS 'reg' and 'ranges' properties handling. |
34 | * @brief SBUS 'reg' and 'ranges' properties handling. |
35 | * |
35 | * |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <genarch/ofw/ofw_tree.h> |
38 | #include <genarch/ofw/ofw_tree.h> |
39 | #include <macros.h> |
39 | #include <macros.h> |
40 | 40 | ||
41 | bool ofw_sbus_apply_ranges(ofw_tree_node_t *node, ofw_sbus_reg_t *reg, |
41 | bool ofw_sbus_apply_ranges(ofw_tree_node_t *node, ofw_sbus_reg_t *reg, |
42 | uintptr_t *pa) |
42 | uintptr_t *pa) |
43 | { |
43 | { |
44 | ofw_tree_property_t *prop; |
44 | ofw_tree_property_t *prop; |
45 | ofw_sbus_range_t *range; |
45 | ofw_sbus_range_t *range; |
46 | count_t ranges; |
46 | size_t ranges; |
47 | 47 | ||
48 | /* |
48 | /* |
49 | * The SBUS support is very rudimentary in that we simply assume |
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. |
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, |
51 | * Should we come across configurations that need more robust support, |
52 | * the driver will have to be extended to handle different topologies. |
52 | * the driver will have to be extended to handle different topologies. |
53 | */ |
53 | */ |
54 | if (!node->parent || node->parent->parent) |
54 | if (!node->parent || node->parent->parent) |
55 | return false; |
55 | return false; |
56 | 56 | ||
57 | prop = ofw_tree_getprop(node, "ranges"); |
57 | prop = ofw_tree_getprop(node, "ranges"); |
58 | if (!prop) |
58 | if (!prop) |
59 | return false; |
59 | return false; |
60 | 60 | ||
61 | ranges = prop->size / sizeof(ofw_sbus_range_t); |
61 | ranges = prop->size / sizeof(ofw_sbus_range_t); |
62 | range = prop->value; |
62 | range = prop->value; |
63 | 63 | ||
64 | unsigned int i; |
64 | unsigned int i; |
65 | 65 | ||
66 | for (i = 0; i < ranges; i++) { |
66 | for (i = 0; i < ranges; i++) { |
67 | if (overlaps(reg->addr, reg->size, range[i].child_base, |
67 | if (overlaps(reg->addr, reg->size, range[i].child_base, |
68 | range[i].size)) { |
68 | range[i].size)) { |
69 | *pa = range[i].parent_base + |
69 | *pa = range[i].parent_base + |
70 | (reg->addr - range[i].child_base); |
70 | (reg->addr - range[i].child_base); |
71 | return true; |
71 | return true; |
72 | } |
72 | } |
73 | } |
73 | } |
74 | 74 | ||
75 | return false; |
75 | return false; |
76 | } |
76 | } |
77 | 77 | ||
78 | /** @} |
78 | /** @} |
79 | */ |
79 | */ |
80 | 80 |