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1896 jermar 1
/*
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 * Copyright (c) 2006 Jakub Jermar
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 * 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   FHC '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/drivers/fhc.h>
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#include <arch/memstr.h>
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#include <string.h>
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#include <panic.h>
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#include <macros.h>
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bool ofw_fhc_apply_ranges(ofw_tree_node_t *node, ofw_fhc_reg_t *reg, uintptr_t *pa)
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{
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    ofw_tree_property_t *prop;
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    ofw_fhc_range_t *range;
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    size_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_fhc_range_t);
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    range = prop->value;
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    unsigned int i;
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    for (i = 0; i < ranges; i++) {
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        if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {
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            uintptr_t addr;
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            addr = range[i].parent_base + (reg->addr - range[i].child_base);
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            if (!node->parent->parent) {
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                *pa = addr;
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                return true;
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            }
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            if (str_cmp(ofw_tree_node_name(node->parent), "central") != 0)
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                panic("Unexpected parent node: %s.", ofw_tree_node_name(node->parent));
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            ofw_central_reg_t central_reg;
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            central_reg.addr = addr;
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            central_reg.size = reg->size;
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            return ofw_central_apply_ranges(node->parent, &central_reg, pa);
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        }
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    }
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    return false;
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}
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bool ofw_central_apply_ranges(ofw_tree_node_t *node, ofw_central_reg_t *reg, uintptr_t *pa)
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{
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    if (node->parent->parent)
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        panic("Unexpected parent node: %s.", ofw_tree_node_name(node->parent));
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    ofw_tree_property_t *prop;
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    ofw_central_range_t *range;
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    size_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_central_range_t);
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    range = prop->value;
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    unsigned int i;
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    for (i = 0; i < ranges; i++) {
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        if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {
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            *pa = range[i].parent_base + (reg->addr - range[i].child_base);
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            return true;
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        }
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    }
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    return false;
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}
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bool
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ofw_fhc_map_interrupt(ofw_tree_node_t *node, ofw_fhc_reg_t *reg,
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    uint32_t interrupt, int *inr, cir_t *cir, void **cir_arg)
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{
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    fhc_t *fhc = NULL;
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    if (!node->device) {
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        fhc = fhc_init(node);
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        if (!fhc)
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            return false;
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        node->device = fhc;
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        central_fhc = fhc;
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    }
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    /*
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     * The interrupt controller for the interrupt is the FHC itself.
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     */
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    fhc_enable_interrupt(fhc, interrupt);
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    *inr = interrupt;
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    *cir = fhc_clear_interrupt;
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    *cir_arg = fhc;
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    return true;
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}
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/** @}
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 */