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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2510 | jermar | 1 | /* |
| 2 | * Copyright (c) 2007 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup ofw |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** |
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| 33 | * @file |
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| 34 | * @brief SBUS 'reg' and 'ranges' properties handling. |
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| 35 | * |
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| 36 | */ |
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| 37 | |||
| 38 | #include <genarch/ofw/ofw_tree.h> |
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| 39 | #include <macros.h> |
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| 40 | |||
| 41 | bool ofw_sbus_apply_ranges(ofw_tree_node_t *node, ofw_sbus_reg_t *reg, |
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| 42 | uintptr_t *pa) |
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| 43 | { |
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| 44 | ofw_tree_property_t *prop; |
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| 45 | ofw_sbus_range_t *range; |
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| 4537 | trochtova | 46 | size_t ranges; |
| 2510 | jermar | 47 | |
| 48 | /* |
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| 49 | * The SBUS support is very rudimentary in that we simply assume |
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| 50 | * that the SBUS bus in question is connected directly to the UPA bus. |
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| 51 | * Should we come across configurations that need more robust support, |
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| 52 | * the driver will have to be extended to handle different topologies. |
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| 53 | */ |
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| 54 | if (!node->parent || node->parent->parent) |
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| 55 | return false; |
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| 56 | |||
| 57 | prop = ofw_tree_getprop(node, "ranges"); |
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| 58 | if (!prop) |
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| 59 | return false; |
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| 60 | |||
| 61 | ranges = prop->size / sizeof(ofw_sbus_range_t); |
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| 62 | range = prop->value; |
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| 63 | |||
| 2745 | decky | 64 | unsigned int i; |
| 2510 | jermar | 65 | |
| 66 | for (i = 0; i < ranges; i++) { |
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| 67 | if (overlaps(reg->addr, reg->size, range[i].child_base, |
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| 68 | range[i].size)) { |
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| 69 | *pa = range[i].parent_base + |
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| 70 | (reg->addr - range[i].child_base); |
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| 71 | return true; |
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| 72 | } |
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| 73 | } |
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| 74 | |||
| 75 | return false; |
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| 76 | } |
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| 77 | |||
| 78 | /** @} |
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| 79 | */ |