| 0,0 → 1,140 |
|---|
| /* |
| * Copyright (c) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ofw |
| * @{ |
| */ |
| /** |
| * @file |
| * @brief PCI 'reg' and 'ranges' properties handling. |
| * |
| */ |
| |
| #include <genarch/ofw/ofw_tree.h> |
| #include <arch/drivers/pci.h> |
| #include <arch/trap/interrupt.h> |
| #include <arch/memstr.h> |
| #include <func.h> |
| #include <panic.h> |
| #include <macros.h> |
| |
| #define PCI_SPACE_MASK 0x03000000 |
| #define PCI_ABS_MASK 0x80000000 |
| #define PCI_REG_MASK 0x000000ff |
| |
| #define PCI_IGN 0x1f |
| |
| bool ofw_pci_apply_ranges(ofw_tree_node_t *node, ofw_pci_reg_t *reg, uintptr_t *pa) |
| { |
| ofw_tree_property_t *prop; |
| ofw_pci_range_t *range; |
| count_t ranges; |
| |
| prop = ofw_tree_getprop(node, "ranges"); |
| if (!prop) { |
| if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0) |
| return ofw_pci_apply_ranges(node->parent, reg, pa); |
| return false; |
| } |
| |
| ranges = prop->size / sizeof(ofw_pci_range_t); |
| range = prop->value; |
| |
| unsigned int i; |
| |
| for (i = 0; i < ranges; i++) { |
| if ((reg->space & PCI_SPACE_MASK) != (range[i].space & PCI_SPACE_MASK)) |
| continue; |
| if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) { |
| *pa = range[i].parent_base + (reg->addr - range[i].child_base); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool ofw_pci_reg_absolutize(ofw_tree_node_t *node, ofw_pci_reg_t *reg, ofw_pci_reg_t *out) |
| { |
| if (reg->space & PCI_ABS_MASK) { |
| /* already absolute */ |
| out->space = reg->space; |
| out->addr = reg->addr; |
| out->size = reg->size; |
| return true; |
| } |
| |
| ofw_tree_property_t *prop; |
| ofw_pci_reg_t *assigned_address; |
| count_t assigned_addresses; |
| |
| prop = ofw_tree_getprop(node, "assigned-addresses"); |
| if (!prop) |
| panic("Can't find \"assigned-addresses\" property.\n"); |
| |
| assigned_addresses = prop->size / sizeof(ofw_pci_reg_t); |
| assigned_address = prop->value; |
| |
| unsigned int i; |
| |
| for (i = 0; i < assigned_addresses; i++) { |
| if ((assigned_address[i].space & PCI_REG_MASK) == (reg->space & PCI_REG_MASK)) { |
| out->space = assigned_address[i].space; |
| out->addr = reg->addr + assigned_address[i].addr; |
| out->size = reg->size; |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** Map PCI interrupt. |
| * |
| * So far, we only know how to map interrupts of non-PCI devices connected |
| * to a PCI bridge. |
| */ |
| bool ofw_pci_map_interrupt(ofw_tree_node_t *node, ofw_pci_reg_t *reg, int ino, int *inr) |
| { |
| pci_t *pci = node->device; |
| if (!pci) { |
| pci = pci_init(node); |
| if (!pci) |
| return false; |
| node->device = pci; |
| } |
| |
| pci_enable_interrupt(pci, ino); |
| |
| *inr = (PCI_IGN << IGN_SHIFT) | ino; |
| |
| return true; |
| } |
| |
| /** @} |
| */ |