Subversion Repositories HelenOS

Rev

Rev 1910 | Rev 1912 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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/drivers/pci.h>
  40. #include <arch/memstr.h>
  41. #include <arch/trap/interrupt.h>
  42. #include <func.h>
  43. #include <panic.h>
  44. #include <debug.h>
  45. #include <macros.h>
  46.  
  47. /** Apply EBUS ranges to EBUS register. */
  48. bool 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.     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, range[i].size)) {
  67.             ofw_pci_reg_t pci_reg;
  68.            
  69.             pci_reg.space = range[i].parent_space;
  70.             pci_reg.addr = range[i].parent_base + (reg->addr - range[i].child_base);
  71.             pci_reg.size = reg->size;
  72.            
  73.             return ofw_pci_apply_ranges(node->parent, &pci_reg, pa);
  74.         }
  75.     }
  76.  
  77.     return false;
  78. }
  79.  
  80. bool ofw_ebus_map_interrupts(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *inr)
  81. {
  82.     ofw_tree_property_t *prop;
  83.     ofw_tree_node_t *controller;
  84.    
  85.     prop = ofw_tree_getprop(node, "interrupt-map");
  86.     if (!prop || !prop->value)
  87.         return false;
  88.  
  89.     ofw_ebus_intr_map_t *intr_map = prop->value;
  90.     count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
  91.    
  92.     ASSERT(count);
  93.    
  94.     prop = ofw_tree_getprop(node, "interrupt-map-mask");
  95.     if (!prop || !prop->value)
  96.         return false;
  97.    
  98.     ofw_ebus_intr_mask_t *intr_mask = prop->value;
  99.    
  100.     ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
  101.    
  102.     uint32_t space = reg->space & intr_mask->space_mask;
  103.     uint32_t addr = reg->addr & intr_mask->addr_mask;
  104.     uint32_t intr = interrupt & intr_mask->intr_mask;
  105.    
  106.     int i;
  107.     for (i = 0; i < count; i++) {
  108.         if ((intr_map[i].space == space) && (intr_map[i].addr == addr)
  109.             && (intr_map[i].intr == intr))
  110.             goto found;
  111.     }
  112.     return false;
  113.  
  114. found:
  115.     /*
  116.      * We found the device that functions as an interrupt controller
  117.      * for the interrupt. We also found mapping from interrupt to INR.
  118.      * What needs to be done now is to verify that this indeed is a PCI
  119.      * node.
  120.      */
  121.  
  122.     controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"), intr_map[i].controller_handle);
  123.     if (!controller)
  124.         return false;
  125.        
  126.     if (strcmp(ofw_tree_node_name(controller), "pci") != 0) {
  127.         /*
  128.          * This is not a PCI node.
  129.          */
  130.         return false;
  131.     }
  132.  
  133.     pci_t *pci = controller->device;
  134.     if (!pci) {
  135.         pci = pci_init(controller);
  136.         if (!pci)
  137.             return false;
  138.         controller->device = pci;
  139.        
  140.     }
  141.     pci_enable_interrupt(pci, intr_map[i].controller_inr);
  142.  
  143.     *inr = intr_map[i].controller_inr;
  144.     *inr |= 0x1f << IGN_SHIFT;      /* 0x1f is hardwired IGN */
  145.    
  146.     return true;
  147. }
  148.  
  149. /** @}
  150.  */
  151.