include/asm-ppc64/prom.h

   1 #ifndef _PPC64_PROM_H
   2 #define _PPC64_PROM_H
   3
   4 /*
   5  * Definitions for talking to the Open Firmware PROM on
   6  * Power Macintosh computers.
   7  *
   8  * Copyright (C) 1996 Paul Mackerras.
   9  *
  10  * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version
  15  * 2 of the License, or (at your option) any later version.
  16  */
  17 #include <linux/proc_fs.h>
  18 #include <asm/atomic.h>
  19
  20 #define PTRRELOC(x)     ((typeof(x))((unsigned long)(x) - offset))
  21 #define PTRUNRELOC(x)   ((typeof(x))((unsigned long)(x) + offset))
  22 #define RELOC(x)        (*PTRRELOC(&(x)))
  23
  24 #define LONG_LSW(X) (((unsigned long)X) & 0xffffffff)
  25 #define LONG_MSW(X) (((unsigned long)X) >> 32)
  26
  27 /* Definitions used by the flattened device tree */
  28 #define OF_DT_HEADER            0xd00dfeed      /* 4: version, 4: total size */
  29 #define OF_DT_BEGIN_NODE        0x1             /* Start node: full name */
  30 #define OF_DT_END_NODE          0x2             /* End node */
  31 #define OF_DT_PROP              0x3             /* Property: name off, size, content */
  32 #define OF_DT_END               0x9
  33
  34 #define OF_DT_VERSION           1
  35
  36 /*
  37  * This is what gets passed to the kernel by prom_init or kexec
  38  *
  39  * The dt struct contains the device tree structure, full pathes and
  40  * property contents. The dt strings contain a separate block with just
  41  * the strings for the property names, and is fully page aligned and
  42  * self contained in a page, so that it can be kept around by the kernel,
  43  * each property name appears only once in this page (cheap compression)
  44  *
  45  * the mem_rsvmap contains a map of reserved ranges of physical memory,
  46  * passing it here instead of in the device-tree itself greatly simplifies
  47  * the job of everybody. It's just a list of u64 pairs (base/size) that
  48  * ends when size is 0
  49  */
  50 struct boot_param_header
  51 {
  52         u32     magic;                  /* magic word OF_DT_HEADER */
  53         u32     totalsize;              /* total size of DT block */
  54         u32     off_dt_struct;          /* offset to structure */
  55         u32     off_dt_strings;         /* offset to strings */
  56         u32     off_mem_rsvmap;         /* offset to memory reserve map */
  57         u32     version;                /* format version */
  58         u32     last_comp_version;      /* last compatible version */
  59 };
  60
  61
  62
  63 typedef u32 phandle;
  64 typedef u32 ihandle;
  65 typedef u32 phandle32;
  66 typedef u32 ihandle32;
  67
  68 struct address_range {
  69         unsigned long space;
  70         unsigned long address;
  71         unsigned long size;
  72 };
  73
  74 struct interrupt_info {
  75         int     line;
  76         int     sense;          /* +ve/-ve logic, edge or level, etc. */
  77 };
  78
  79 struct pci_address {
  80         u32 a_hi;
  81         u32 a_mid;
  82         u32 a_lo;
  83 };
  84
  85 struct isa_address {
  86         u32 a_hi;
  87         u32 a_lo;
  88 };
  89
  90 struct isa_range {
  91         struct isa_address isa_addr;
  92         struct pci_address pci_addr;
  93         unsigned int size;
  94 };
  95
  96 struct pci_range32 {
  97         struct pci_address child_addr;
  98         unsigned int  parent_addr;
  99         unsigned long size;
 100 };
 101
 102 struct pci_range64 {
 103         struct pci_address child_addr;
 104         unsigned long parent_addr;
 105         unsigned long size;
 106 };
 107
 108 union pci_range {
 109         struct {
 110                 struct pci_address addr;
 111                 u32 phys;
 112                 u32 size_hi;
 113         } pci32;
 114         struct {
 115                 struct pci_address addr;
 116                 u32 phys_hi;
 117                 u32 phys_lo;
 118                 u32 size_hi;
 119                 u32 size_lo;
 120         } pci64;
 121 };
 122
 123 struct of_tce_table {
 124         phandle node;
 125         unsigned long base;
 126         unsigned long size;
 127 };
 128 extern struct of_tce_table of_tce_table[];
 129
 130 struct reg_property {
 131         unsigned long address;
 132         unsigned long size;
 133 };
 134
 135 struct reg_property32 {
 136         unsigned int address;
 137         unsigned int size;
 138 };
 139
 140 struct reg_property64 {
 141         unsigned long address;
 142         unsigned long size;
 143 };
 144
 145 struct reg_property_pmac {
 146         unsigned int address_hi;
 147         unsigned int address_lo;
 148         unsigned int size;
 149 };
 150
 151 struct translation_property {
 152         unsigned long virt;
 153         unsigned long size;
 154         unsigned long phys;
 155         unsigned int flags;
 156 };
 157
 158 struct property {
 159         char    *name;
 160         int     length;
 161         unsigned char *value;
 162         struct property *next;
 163 };
 164
 165 /* NOTE: the device_node contains PCI specific info for pci devices.
 166  * This perhaps could be hung off the device_node with another struct,
 167  * but for now it is directly in the node.  The phb ptr is a good
 168  * indication of a real PCI node.  Other nodes leave these fields zeroed.
 169  */
 170 struct pci_controller;
 171 struct iommu_table;
 172
 173 struct device_node {
 174         char    *name;
 175         char    *type;
 176         phandle node;
 177         phandle linux_phandle;
 178         int     n_addrs;
 179         struct  address_range *addrs;
 180         int     n_intrs;
 181         struct  interrupt_info *intrs;
 182         char    *full_name;
 183
 184         /* PCI stuff probably doesn't belong here */
 185         int     busno;                  /* for pci devices */
 186         int     bussubno;               /* for pci devices */
 187         int     devfn;                  /* for pci devices */
 188 #define DN_STATUS_BIST_FAILED (1<<0)
 189         int     status;                 /* Current device status (non-zero is bad) */
 190         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
 191         int     eeh_config_addr;
 192         struct  pci_controller *phb;    /* for pci devices */
 193         struct  iommu_table *iommu_table;       /* for phb's or bridges */
 194
 195         struct  property *properties;
 196         struct  device_node *parent;
 197         struct  device_node *child;
 198         struct  device_node *sibling;
 199         struct  device_node *next;      /* next device of same type */
 200         struct  device_node *allnext;   /* next in list of all nodes */
 201         struct  proc_dir_entry *pde;       /* this node's proc directory */
 202         struct  proc_dir_entry *name_link; /* name symlink */
 203         struct  proc_dir_entry *addr_link; /* addr symlink */
 204         atomic_t _users;                 /* reference count */
 205         unsigned long _flags;
 206 };
 207
 208 extern struct device_node *of_chosen;
 209
 210 /* flag descriptions */
 211 #define OF_STALE   0 /* node is slated for deletion */
 212 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
 213
 214 #define OF_IS_STALE(x) test_bit(OF_STALE, &x->_flags)
 215 #define OF_MARK_STALE(x) set_bit(OF_STALE, &x->_flags)
 216 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
 217 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
 218
 219 /*
 220  * Until 32-bit ppc can add proc_dir_entries to its device_node
 221  * definition, we cannot refer to pde, name_link, and addr_link
 222  * in arch-independent code.
 223  */
 224 #define HAVE_ARCH_DEVTREE_FIXUPS
 225
 226 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
 227 {
 228         dn->pde = de;
 229 }
 230
 231 static void inline set_node_name_link(struct device_node *dn, struct proc_dir_entry *de)
 232 {
 233         dn->name_link = de;
 234 }
 235
 236 static void inline set_node_addr_link(struct device_node *dn, struct proc_dir_entry *de)
 237 {
 238         dn->addr_link = de;
 239 }
 240
 241 /* OBSOLETE: Old stlye node lookup */
 242 extern struct device_node *find_devices(const char *name);
 243 extern struct device_node *find_type_devices(const char *type);
 244 extern struct device_node *find_path_device(const char *path);
 245 extern struct device_node *find_compatible_devices(const char *type,
 246                                                    const char *compat);
 247 extern struct device_node *find_all_nodes(void);
 248
 249 /* New style node lookup */
 250 extern struct device_node *of_find_node_by_name(struct device_node *from,
 251         const char *name);
 252 extern struct device_node *of_find_node_by_type(struct device_node *from,
 253         const char *type);
 254 extern struct device_node *of_find_compatible_node(struct device_node *from,
 255         const char *type, const char *compat);
 256 extern struct device_node *of_find_node_by_path(const char *path);
 257 extern struct device_node *of_find_node_by_phandle(phandle handle);
 258 extern struct device_node *of_find_all_nodes(struct device_node *prev);
 259 extern struct device_node *of_get_parent(const struct device_node *node);
 260 extern struct device_node *of_get_next_child(const struct device_node *node,
 261                                              struct device_node *prev);
 262 extern struct device_node *of_node_get(struct device_node *node);
 263 extern void of_node_put(struct device_node *node);
 264
 265 /* For updating the device tree at runtime */
 266 extern int of_add_node(const char *path, struct property *proplist);
 267 extern int of_remove_node(struct device_node *np);
 268
 269 /* Other Prototypes */
 270 extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
 271         unsigned long, unsigned long);
 272 extern void relocate_nodes(void);
 273 extern void finish_device_tree(void);
 274 extern int device_is_compatible(struct device_node *device, const char *);
 275 extern int machine_is_compatible(const char *compat);
 276 extern unsigned char *get_property(struct device_node *node, const char *name,
 277                                    int *lenp);
 278 extern void print_properties(struct device_node *node);
 279 extern int prom_n_addr_cells(struct device_node* np);
 280 extern int prom_n_size_cells(struct device_node* np);
 281 extern int prom_n_intr_cells(struct device_node* np);
 282 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
 283 extern void prom_add_property(struct device_node* np, struct property* prop);
 284
 285 #endif /* _PPC64_PROM_H */