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; |
|
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; |
|
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; |
} |
|
/** @} |
*/ |