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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. #ifndef KERN_OFW_TREE_H_
  30. #define KERN_OFW_TREE_H_
  31.  
  32. #include <arch/types.h>
  33.  
  34. #define OFW_TREE_PROPERTY_MAX_NAMELEN   32
  35.  
  36. typedef struct ofw_tree_node ofw_tree_node_t;
  37. typedef struct ofw_tree_property ofw_tree_property_t;
  38.  
  39. /** Memory representation of OpenFirmware device tree node. */
  40. struct ofw_tree_node {
  41.     ofw_tree_node_t *parent;
  42.     ofw_tree_node_t *peer;
  43.     ofw_tree_node_t *child;
  44.  
  45.     uint32_t node_handle;           /**< Old OpenFirmware node handle. */
  46.  
  47.     char *da_name;              /**< Disambigued name. */
  48.  
  49.     unsigned properties;            /**< Number of properties. */
  50.     ofw_tree_property_t *property;
  51.    
  52.     /**
  53.      * Pointer to a structure representing respective device.
  54.      * Its semantics is device dependent.
  55.      */
  56.     void *device;
  57. };
  58.  
  59. /** Memory representation of OpenFirmware device tree node property. */
  60. struct ofw_tree_property {
  61.     char name[OFW_TREE_PROPERTY_MAX_NAMELEN];
  62.     size_t size;
  63.     void *value;
  64. };
  65.  
  66. /*
  67.  * Definition of 'reg' and 'ranges' properties for various buses.
  68.  */
  69.  
  70. struct ofw_fhc_reg {
  71.     uint64_t addr;
  72.     uint32_t size;
  73. } __attribute__ ((packed));
  74. typedef struct ofw_fhc_reg ofw_fhc_reg_t;
  75.            
  76. struct ofw_fhc_range {
  77.     uint64_t child_base;
  78.     uint64_t parent_base;
  79.     uint32_t size;
  80. } __attribute__ ((packed));
  81. typedef struct ofw_fhc_range ofw_fhc_range_t;
  82.  
  83. struct ofw_central_reg {
  84.     uint64_t addr;
  85.     uint32_t size;
  86. } __attribute__ ((packed));
  87. typedef struct ofw_central_reg ofw_central_reg_t;
  88.  
  89. struct ofw_central_range {
  90.     uint64_t child_base;
  91.     uint64_t parent_base;
  92.     uint32_t size;
  93. } __attribute__ ((packed));
  94. typedef struct ofw_central_range ofw_central_range_t;
  95.  
  96. struct ofw_ebus_reg {
  97.     uint32_t space;
  98.     uint32_t addr;
  99.     uint32_t size;
  100. } __attribute__ ((packed));
  101. typedef struct ofw_ebus_reg ofw_ebus_reg_t;
  102.  
  103. struct ofw_ebus_range {
  104.     uint32_t child_space;
  105.     uint32_t child_base;
  106.     uint32_t parent_space;
  107.     uint64_t parent_base;       /* group phys.mid and phys.lo together */
  108.     uint32_t size;
  109. } __attribute__ ((packed));
  110. typedef struct ofw_ebus_range ofw_ebus_range_t;
  111.  
  112. struct ofw_ebus_intr_map {
  113.     uint32_t space;
  114.     uint32_t addr;
  115.     uint32_t intr;
  116.     uint32_t controller_handle;
  117.     uint32_t controller_ino;
  118. } __attribute__ ((packed));
  119. typedef struct ofw_ebus_intr_map ofw_ebus_intr_map_t;
  120.  
  121. struct ofw_ebus_intr_mask {
  122.     uint32_t space_mask;
  123.     uint32_t addr_mask;
  124.     uint32_t intr_mask;
  125. } __attribute__ ((packed));
  126. typedef struct ofw_ebus_intr_mask ofw_ebus_intr_mask_t;
  127.  
  128. struct ofw_pci_reg {
  129.     uint32_t space;         /* needs to be masked to obtain pure space id */
  130.     uint64_t addr;          /* group phys.mid and phys.lo together */
  131.     uint64_t size;
  132. } __attribute__ ((packed));
  133. typedef struct ofw_pci_reg ofw_pci_reg_t;
  134.  
  135. struct ofw_pci_range {
  136.     uint32_t space;
  137.     uint64_t child_base;        /* group phys.mid and phys.lo together */
  138.     uint64_t parent_base;
  139.     uint64_t size;
  140. } __attribute__ ((packed));
  141. typedef struct ofw_pci_range ofw_pci_range_t;
  142.  
  143. struct ofw_upa_reg {
  144.     uint64_t addr;
  145.     uint64_t size;
  146. } __attribute__ ((packed));
  147. typedef struct ofw_upa_reg ofw_upa_reg_t;
  148.  
  149. extern void ofw_tree_init(ofw_tree_node_t *root);
  150. extern void ofw_tree_print(void);
  151. extern const char *ofw_tree_node_name(const ofw_tree_node_t *node);
  152. extern ofw_tree_node_t *ofw_tree_lookup(const char *path);
  153. extern ofw_tree_property_t *ofw_tree_getprop(const ofw_tree_node_t *node, const char *name);
  154. extern ofw_tree_node_t *ofw_tree_find_child(ofw_tree_node_t *node, const char *name);
  155. extern ofw_tree_node_t *ofw_tree_find_child_by_device_type(ofw_tree_node_t *node, const char *device_type);
  156. extern ofw_tree_node_t *ofw_tree_find_peer_by_device_type(ofw_tree_node_t *node, const char *device_type);
  157. extern ofw_tree_node_t *ofw_tree_find_node_by_handle(ofw_tree_node_t *root, uint32_t handle);
  158.  
  159. extern bool ofw_fhc_apply_ranges(ofw_tree_node_t *node, ofw_fhc_reg_t *reg, uintptr_t *pa);
  160. extern bool ofw_central_apply_ranges(ofw_tree_node_t *node, ofw_central_reg_t *reg, uintptr_t *pa);
  161. extern bool ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa);
  162. extern bool ofw_pci_apply_ranges(ofw_tree_node_t *node, ofw_pci_reg_t *reg, uintptr_t *pa);
  163. extern bool ofw_upa_apply_ranges(ofw_tree_node_t *node, ofw_upa_reg_t *reg, uintptr_t *pa);
  164.  
  165. extern bool ofw_pci_reg_absolutize(ofw_tree_node_t *node, ofw_pci_reg_t *reg, ofw_pci_reg_t *out);
  166.  
  167. extern bool ofw_fhc_map_interrupt(ofw_tree_node_t *node, ofw_fhc_reg_t *reg, uint32_t interrupt, int *inr);
  168. extern bool ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *inr);
  169. extern bool ofw_pci_map_interrupt(ofw_tree_node_t *node, ofw_pci_reg_t *reg, int ino, int *inr);
  170.  
  171. #endif
  172.