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 EBUS 'reg' and 'ranges' properties handling. |
* |
*/ |
|
#include <genarch/ofw/ofw_tree.h> |
#include <arch/memstr.h> |
#include <arch/trap/interrupt.h> |
#include <func.h> |
#include <panic.h> |
#include <debug.h> |
#include <macros.h> |
|
/** Apply EBUS ranges to EBUS register. */ |
bool ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa) |
{ |
ofw_tree_property_t *prop; |
ofw_ebus_range_t *range; |
count_t ranges; |
|
prop = ofw_tree_getprop(node, "ranges"); |
if (!prop) |
return false; |
|
ranges = prop->size / sizeof(ofw_ebus_range_t); |
range = prop->value; |
|
int i; |
|
for (i = 0; i < ranges; i++) { |
if (reg->space != range[i].child_space) |
continue; |
if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) { |
ofw_pci_reg_t pci_reg; |
|
pci_reg.space = range[i].parent_space; |
pci_reg.addr = range[i].parent_base + (reg->addr - range[i].child_base); |
pci_reg.size = reg->size; |
|
return ofw_pci_apply_ranges(node->parent, &pci_reg, pa); |
} |
} |
|
return false; |
} |
|
bool ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *inr) |
{ |
ofw_tree_property_t *prop; |
ofw_tree_node_t *controller; |
|
prop = ofw_tree_getprop(node, "interrupt-map"); |
if (!prop || !prop->value) |
return false; |
|
ofw_ebus_intr_map_t *intr_map = prop->value; |
count_t count = prop->size / sizeof(ofw_ebus_intr_map_t); |
|
ASSERT(count); |
|
prop = ofw_tree_getprop(node, "interrupt-map-mask"); |
if (!prop || !prop->value) |
return false; |
|
ofw_ebus_intr_mask_t *intr_mask = prop->value; |
|
ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t)); |
|
uint32_t space = reg->space & intr_mask->space_mask; |
uint32_t addr = reg->addr & intr_mask->addr_mask; |
uint32_t intr = interrupt & intr_mask->intr_mask; |
|
int i; |
for (i = 0; i < count; i++) { |
if ((intr_map[i].space == space) && (intr_map[i].addr == addr) |
&& (intr_map[i].intr == intr)) |
goto found; |
} |
return false; |
|
found: |
/* |
* We found the device that functions as an interrupt controller |
* for the interrupt. We also found partial mapping from interrupt to INO. |
*/ |
|
controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"), intr_map[i].controller_handle); |
if (!controller) |
return false; |
|
if (strcmp(ofw_tree_node_name(controller), "pci") != 0) { |
/* |
* This is not a PCI node. |
*/ |
return false; |
} |
|
/* |
* Let the PCI do the next step in mapping the interrupt. |
*/ |
if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino, inr)) |
return false; |
|
return true; |
} |
|
/** @} |
*/ |