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1896 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2006 Jakub Jermar
1896 jermar 3 
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup ofw
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 * @{
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 */
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/**
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 * @file
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 * @brief   EBUS 'reg' and 'ranges' properties handling.
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 *
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 */
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#include <genarch/ofw/ofw_tree.h>
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#include <arch/memstr.h>
1911 jermar 40 
#include <arch/trap/interrupt.h>
4345 svoboda 41 
#include <string.h>
1896 jermar 42 
#include <panic.h>
1909 jermar 43 
#include <debug.h>
1896 jermar 44 
#include <macros.h>
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1911 jermar 46 
/** Apply EBUS ranges to EBUS register. */
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bool
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ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa)
1896 jermar 49 
{
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    ofw_tree_property_t *prop;
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    ofw_ebus_range_t *range;
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    count_t ranges;
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    prop = ofw_tree_getprop(node, "ranges");
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    if (!prop)
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        return false;
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    ranges = prop->size / sizeof(ofw_ebus_range_t);
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    range = prop->value;
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2745 decky 61 
    unsigned int i;
1896 jermar 62 
 
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    for (i = 0; i < ranges; i++) {
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        if (reg->space != range[i].child_space)
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            continue;
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        if (overlaps(reg->addr, reg->size, range[i].child_base,
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            range[i].size)) {
1896 jermar 68 
            ofw_pci_reg_t pci_reg;
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            pci_reg.space = range[i].parent_space;
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            pci_reg.addr = range[i].parent_base +
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                (reg->addr - range[i].child_base);
1896 jermar 73 
            pci_reg.size = reg->size;
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            return ofw_pci_apply_ranges(node->parent, &pci_reg, pa);
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        }
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    }
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    return false;
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}
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3674 svoboda 82 
bool
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ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg,
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    uint32_t interrupt, int *inr, cir_t *cir, void **cir_arg)
1909 jermar 85 
{
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    ofw_tree_property_t *prop;
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    ofw_tree_node_t *controller;
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    prop = ofw_tree_getprop(node, "interrupt-map");
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    if (!prop || !prop->value)
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        return false;
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    ofw_ebus_intr_map_t *intr_map = prop->value;
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    count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
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    ASSERT(count);
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    prop = ofw_tree_getprop(node, "interrupt-map-mask");
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    if (!prop || !prop->value)
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        return false;
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    ofw_ebus_intr_mask_t *intr_mask = prop->value;
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    ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
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    uint32_t space = reg->space & intr_mask->space_mask;
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    uint32_t addr = reg->addr & intr_mask->addr_mask;
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    uint32_t intr = interrupt & intr_mask->intr_mask;
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2745 decky 110 
    unsigned int i;
1909 jermar 111 
    for (i = 0; i < count; i++) {
3674 svoboda 112 
        if ((intr_map[i].space == space) &&
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            (intr_map[i].addr == addr) && (intr_map[i].intr == intr))
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            goto found;
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    }
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    return false;
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found:
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    /*
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     * We found the device that functions as an interrupt controller
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     * for the interrupt. We also found partial mapping from interrupt to
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     * INO.
1909 jermar 123 
     */
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3674 svoboda 125 
    controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"),
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        intr_map[i].controller_handle);
1911 jermar 127 
    if (!controller)
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        return false;
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130 
    if (strcmp(ofw_tree_node_name(controller), "pci") != 0) {
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        /*
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         * This is not a PCI node.
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         */
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        return false;
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    }
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1912 jermar 137 
    /*
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     * Let the PCI do the next step in mapping the interrupt.
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     */
3674 svoboda 140 
    if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino,
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        inr, cir, cir_arg))
1912 jermar 142 
        return false;
1911 jermar 143 
 
1909 jermar 144 
    return true;
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}
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1896 jermar 147 
/** @}
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 */