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  1. /*
  2.  * Copyright (c) 2006 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup ofw
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief   EBUS 'reg' and 'ranges' properties handling.
  35.  *
  36.  */
  37.  
  38. #include <genarch/ofw/ofw_tree.h>
  39. #include <arch/memstr.h>
  40. #include <arch/trap/interrupt.h>
  41. #include <func.h>
  42. #include <panic.h>
  43. #include <debug.h>
  44. #include <macros.h>
  45.  
  46. /** Apply EBUS ranges to EBUS register. */
  47. bool ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa)
  48. {
  49.     ofw_tree_property_t *prop;
  50.     ofw_ebus_range_t *range;
  51.     count_t ranges;
  52.  
  53.     prop = ofw_tree_getprop(node, "ranges");
  54.     if (!prop)
  55.         return false;
  56.        
  57.     ranges = prop->size / sizeof(ofw_ebus_range_t);
  58.     range = prop->value;
  59.    
  60.     int i;
  61.    
  62.     for (i = 0; i < ranges; i++) {
  63.         if (reg->space != range[i].child_space)
  64.             continue;
  65.         if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {
  66.             ofw_pci_reg_t pci_reg;
  67.            
  68.             pci_reg.space = range[i].parent_space;
  69.             pci_reg.addr = range[i].parent_base + (reg->addr - range[i].child_base);
  70.             pci_reg.size = reg->size;
  71.            
  72.             return ofw_pci_apply_ranges(node->parent, &pci_reg, pa);
  73.         }
  74.     }
  75.  
  76.     return false;
  77. }
  78.  
  79. bool ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *inr)
  80. {
  81.     ofw_tree_property_t *prop;
  82.     ofw_tree_node_t *controller;
  83.    
  84.     prop = ofw_tree_getprop(node, "interrupt-map");
  85.     if (!prop || !prop->value)
  86.         return false;
  87.  
  88.     ofw_ebus_intr_map_t *intr_map = prop->value;
  89.     count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
  90.    
  91.     ASSERT(count);
  92.    
  93.     prop = ofw_tree_getprop(node, "interrupt-map-mask");
  94.     if (!prop || !prop->value)
  95.         return false;
  96.    
  97.     ofw_ebus_intr_mask_t *intr_mask = prop->value;
  98.    
  99.     ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
  100.    
  101.     uint32_t space = reg->space & intr_mask->space_mask;
  102.     uint32_t addr = reg->addr & intr_mask->addr_mask;
  103.     uint32_t intr = interrupt & intr_mask->intr_mask;
  104.    
  105.     int i;
  106.     for (i = 0; i < count; i++) {
  107.         if ((intr_map[i].space == space) && (intr_map[i].addr == addr)
  108.             && (intr_map[i].intr == intr))
  109.             goto found;
  110.     }
  111.     return false;
  112.  
  113. found:
  114.     /*
  115.      * We found the device that functions as an interrupt controller
  116.      * for the interrupt. We also found partial mapping from interrupt to INO.
  117.      */
  118.  
  119.     controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"), intr_map[i].controller_handle);
  120.     if (!controller)
  121.         return false;
  122.        
  123.     if (strcmp(ofw_tree_node_name(controller), "pci") != 0) {
  124.         /*
  125.          * This is not a PCI node.
  126.          */
  127.         return false;
  128.     }
  129.  
  130.     /*
  131.      * Let the PCI do the next step in mapping the interrupt.
  132.      */
  133.     if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino, inr))
  134.         return false;
  135.  
  136.     return true;
  137. }
  138.  
  139. /** @}
  140.  */
  141.