Rev 1897 | Rev 2071 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1896 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 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 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 | |||
| 1896 | jermar | 52 | bool ofw_pci_apply_ranges(ofw_tree_node_t *node, ofw_pci_reg_t *reg, uintptr_t *pa) |
| 53 | { |
||
| 54 | ofw_tree_property_t *prop; |
||
| 55 | ofw_pci_range_t *range; |
||
| 56 | count_t ranges; |
||
| 57 | |||
| 58 | prop = ofw_tree_getprop(node, "ranges"); |
||
| 59 | if (!prop) { |
||
| 60 | if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0) |
||
| 61 | return ofw_pci_apply_ranges(node->parent, reg, pa); |
||
| 62 | return false; |
||
| 63 | } |
||
| 64 | |||
| 65 | ranges = prop->size / sizeof(ofw_pci_range_t); |
||
| 66 | range = prop->value; |
||
| 67 | |||
| 68 | int i; |
||
| 69 | |||
| 70 | for (i = 0; i < ranges; i++) { |
||
| 71 | if ((reg->space & PCI_SPACE_MASK) != (range[i].space & PCI_SPACE_MASK)) |
||
| 72 | continue; |
||
| 73 | if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) { |
||
| 74 | *pa = range[i].parent_base + (reg->addr - range[i].child_base); |
||
| 75 | return true; |
||
| 76 | } |
||
| 77 | } |
||
| 78 | |||
| 79 | return false; |
||
| 80 | } |
||
| 81 | |||
| 1897 | jermar | 82 | bool ofw_pci_reg_absolutize(ofw_tree_node_t *node, ofw_pci_reg_t *reg, ofw_pci_reg_t *out) |
| 83 | { |
||
| 84 | if (reg->space & PCI_ABS_MASK) { |
||
| 85 | /* already absolute */ |
||
| 86 | out->space = reg->space; |
||
| 87 | out->addr = reg->addr; |
||
| 88 | out->size = reg->size; |
||
| 89 | return true; |
||
| 90 | } |
||
| 91 | |||
| 92 | ofw_tree_property_t *prop; |
||
| 93 | ofw_pci_reg_t *assigned_address; |
||
| 94 | count_t assigned_addresses; |
||
| 95 | |||
| 96 | prop = ofw_tree_getprop(node, "assigned-addresses"); |
||
| 97 | if (!prop) |
||
| 98 | panic("Can't find \"assigned-addresses\" property.\n"); |
||
| 99 | |||
| 100 | assigned_addresses = prop->size / sizeof(ofw_pci_reg_t); |
||
| 101 | assigned_address = prop->value; |
||
| 102 | |||
| 103 | int i; |
||
| 104 | |||
| 105 | for (i = 0; i < assigned_addresses; i++) { |
||
| 106 | if ((assigned_address[i].space & PCI_REG_MASK) == (reg->space & PCI_REG_MASK)) { |
||
| 107 | out->space = assigned_address[i].space; |
||
| 108 | out->addr = reg->addr + assigned_address[i].addr; |
||
| 109 | out->size = reg->size; |
||
| 110 | return true; |
||
| 111 | } |
||
| 112 | } |
||
| 113 | |||
| 114 | return false; |
||
| 115 | } |
||
| 116 | |||
| 1912 | jermar | 117 | /** Map PCI interrupt. |
| 118 | * |
||
| 119 | * So far, we only know how to map interrupts of non-PCI devices connected |
||
| 120 | * to a PCI bridge. |
||
| 121 | */ |
||
| 122 | bool ofw_pci_map_interrupt(ofw_tree_node_t *node, ofw_pci_reg_t *reg, int ino, int *inr) |
||
| 123 | { |
||
| 124 | pci_t *pci = node->device; |
||
| 125 | if (!pci) { |
||
| 126 | pci = pci_init(node); |
||
| 127 | if (!pci) |
||
| 128 | return false; |
||
| 129 | node->device = pci; |
||
| 130 | } |
||
| 131 | |||
| 132 | pci_enable_interrupt(pci, ino); |
||
| 133 | |||
| 134 | *inr = (PCI_IGN << IGN_SHIFT) | ino; |
||
| 135 | |||
| 136 | return true; |
||
| 137 | } |
||
| 138 | |||
| 1896 | jermar | 139 | /** @} |
| 140 | */ |