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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 <string.h>
  42. #include <panic.h>
  43. #include <debug.h>
  44. #include <macros.h>
  45.  
  46. /** Apply EBUS ranges to EBUS register. */
  47. bool
  48. ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa)
  49. {
  50.     ofw_tree_property_t *prop;
  51.     ofw_ebus_range_t *range;
  52.     count_t ranges;
  53.  
  54.     prop = ofw_tree_getprop(node, "ranges");
  55.     if (!prop)
  56.         return false;
  57.        
  58.     ranges = prop->size / sizeof(ofw_ebus_range_t);
  59.     range = prop->value;
  60.    
  61.     unsigned int i;
  62.    
  63.     for (i = 0; i < ranges; i++) {
  64.         if (reg->space != range[i].child_space)
  65.             continue;
  66.         if (overlaps(reg->addr, reg->size, range[i].child_base,
  67.             range[i].size)) {
  68.             ofw_pci_reg_t pci_reg;
  69.            
  70.             pci_reg.space = range[i].parent_space;
  71.             pci_reg.addr = range[i].parent_base +
  72.                 (reg->addr - range[i].child_base);
  73.             pci_reg.size = reg->size;
  74.            
  75.             return ofw_pci_apply_ranges(node->parent, &pci_reg, pa);
  76.         }
  77.     }
  78.  
  79.     return false;
  80. }
  81.  
  82. bool
  83. ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg,
  84.     uint32_t interrupt, int *inr, cir_t *cir, void **cir_arg)
  85. {
  86.     ofw_tree_property_t *prop;
  87.     ofw_tree_node_t *controller;
  88.    
  89.     prop = ofw_tree_getprop(node, "interrupt-map");
  90.     if (!prop || !prop->value)
  91.         return false;
  92.  
  93.     ofw_ebus_intr_map_t *intr_map = prop->value;
  94.     count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
  95.    
  96.     ASSERT(count);
  97.    
  98.     prop = ofw_tree_getprop(node, "interrupt-map-mask");
  99.     if (!prop || !prop->value)
  100.         return false;
  101.    
  102.     ofw_ebus_intr_mask_t *intr_mask = prop->value;
  103.    
  104.     ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
  105.    
  106.     uint32_t space = reg->space & intr_mask->space_mask;
  107.     uint32_t addr = reg->addr & intr_mask->addr_mask;
  108.     uint32_t intr = interrupt & intr_mask->intr_mask;
  109.    
  110.     unsigned int i;
  111.     for (i = 0; i < count; i++) {
  112.         if ((intr_map[i].space == space) &&
  113.             (intr_map[i].addr == addr) && (intr_map[i].intr == intr))
  114.             goto found;
  115.     }
  116.     return false;
  117.  
  118. found:
  119.     /*
  120.      * We found the device that functions as an interrupt controller
  121.      * for the interrupt. We also found partial mapping from interrupt to
  122.      * INO.
  123.      */
  124.  
  125.     controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"),
  126.         intr_map[i].controller_handle);
  127.     if (!controller)
  128.         return false;
  129.        
  130.     if (strcmp(ofw_tree_node_name(controller), "pci") != 0) {
  131.         /*
  132.          * This is not a PCI node.
  133.          */
  134.         return false;
  135.     }
  136.  
  137.     /*
  138.      * Let the PCI do the next step in mapping the interrupt.
  139.      */
  140.     if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino,
  141.         inr, cir, cir_arg))
  142.         return false;
  143.  
  144.     return true;
  145. }
  146.  
  147. /** @}
  148.  */
  149.