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/*
* 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 <string.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;
size_t ranges;
prop = ofw_tree_getprop(node, "ranges");
if (!prop)
return false;
ranges = prop->size / sizeof(ofw_ebus_range_t);
range = prop->value;
unsigned 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, cir_t *cir, void **cir_arg)
{
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;
size_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;
unsigned 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 (str_cmp(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, cir, cir_arg))
return false;
return true;
}
/** @}
*/
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