scripts/dtc/dtc.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef DTC_H
   3 #define DTC_H
   4
   5 /*
   6  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <stdint.h>
  13 #include <stdbool.h>
  14 #include <stdarg.h>
  15 #include <assert.h>
  16 #include <ctype.h>
  17 #include <errno.h>
  18 #include <unistd.h>
  19 #include <inttypes.h>
  20
  21 #include <libfdt_env.h>
  22 #include <fdt.h>
  23
  24 #include "util.h"
  25
  26 #ifdef DEBUG
  27 #define debug(...)      printf(__VA_ARGS__)
  28 #else
  29 #define debug(...)
  30 #endif
  31
  32 #define DEFAULT_FDT_VERSION     17
  33
  34 /*
  35  * Command line options
  36  */
  37 extern int quiet;               /* Level of quietness */
  38 extern int reservenum;          /* Number of memory reservation slots */
  39 extern int minsize;             /* Minimum blob size */
  40 extern int padsize;             /* Additional padding to blob */
  41 extern int alignsize;           /* Additional padding to blob accroding to the alignsize */
  42 extern int phandle_format;      /* Use linux,phandle or phandle properties */
  43 extern int generate_symbols;    /* generate symbols for nodes with labels */
  44 extern int generate_fixups;     /* generate fixups */
  45 extern int auto_label_aliases;  /* auto generate labels -> aliases */
  46 extern int annotate;            /* annotate .dts with input source location */
  47
  48 #define PHANDLE_LEGACY  0x1
  49 #define PHANDLE_EPAPR   0x2
  50 #define PHANDLE_BOTH    0x3
  51
  52 typedef uint32_t cell_t;
  53
  54
  55 #define streq(a, b)     (strcmp((a), (b)) == 0)
  56 #define strstarts(s, prefix)    (strncmp((s), (prefix), strlen(prefix)) == 0)
  57 #define strprefixeq(a, n, b)    (strlen(b) == (n) && (memcmp(a, b, n) == 0))
  58
  59 #define ALIGN(x, a)     (((x) + (a) - 1) & ~((a) - 1))
  60
  61 /* Data blobs */
  62 enum markertype {
  63         TYPE_NONE,
  64         REF_PHANDLE,
  65         REF_PATH,
  66         LABEL,
  67         TYPE_UINT8,
  68         TYPE_UINT16,
  69         TYPE_UINT32,
  70         TYPE_UINT64,
  71         TYPE_STRING,
  72 };
  73 extern const char *markername(enum markertype markertype);
  74
  75 struct  marker {
  76         enum markertype type;
  77         int offset;
  78         char *ref;
  79         struct marker *next;
  80 };
  81
  82 struct data {
  83         int len;
  84         char *val;
  85         struct marker *markers;
  86 };
  87
  88
  89 #define empty_data ((struct data){ 0 /* all .members = 0 or NULL */ })
  90
  91 #define for_each_marker(m) \
  92         for (; (m); (m) = (m)->next)
  93 #define for_each_marker_of_type(m, t) \
  94         for_each_marker(m) \
  95                 if ((m)->type == (t))
  96
  97 size_t type_marker_length(struct marker *m);
  98
  99 void data_free(struct data d);
 100
 101 struct data data_grow_for(struct data d, int xlen);
 102
 103 struct data data_copy_mem(const char *mem, int len);
 104 struct data data_copy_escape_string(const char *s, int len);
 105 struct data data_copy_file(FILE *f, size_t len);
 106
 107 struct data data_append_data(struct data d, const void *p, int len);
 108 struct data data_insert_at_marker(struct data d, struct marker *m,
 109                                   const void *p, int len);
 110 struct data data_merge(struct data d1, struct data d2);
 111 struct data data_append_cell(struct data d, cell_t word);
 112 struct data data_append_integer(struct data d, uint64_t word, int bits);
 113 struct data data_append_re(struct data d, uint64_t address, uint64_t size);
 114 struct data data_append_addr(struct data d, uint64_t addr);
 115 struct data data_append_byte(struct data d, uint8_t byte);
 116 struct data data_append_zeroes(struct data d, int len);
 117 struct data data_append_align(struct data d, int align);
 118
 119 struct data data_add_marker(struct data d, enum markertype type, char *ref);
 120
 121 bool data_is_one_string(struct data d);
 122
 123 /* DT constraints */
 124
 125 #define MAX_PROPNAME_LEN        31
 126 #define MAX_NODENAME_LEN        31
 127
 128 /* Live trees */
 129 struct label {
 130         bool deleted;
 131         char *label;
 132         struct label *next;
 133 };
 134
 135 struct bus_type {
 136         const char *name;
 137 };
 138
 139 struct property {
 140         bool deleted;
 141         char *name;
 142         struct data val;
 143
 144         struct property *next;
 145
 146         struct label *labels;
 147         struct srcpos *srcpos;
 148 };
 149
 150 struct node {
 151         bool deleted;
 152         char *name;
 153         struct property *proplist;
 154         struct node *children;
 155
 156         struct node *parent;
 157         struct node *next_sibling;
 158
 159         char *fullpath;
 160         int basenamelen;
 161
 162         cell_t phandle;
 163         int addr_cells, size_cells;
 164
 165         struct label *labels;
 166         const struct bus_type *bus;
 167         struct srcpos *srcpos;
 168
 169         bool omit_if_unused, is_referenced;
 170 };
 171
 172 #define for_each_label_withdel(l0, l) \
 173         for ((l) = (l0); (l); (l) = (l)->next)
 174
 175 #define for_each_label(l0, l) \
 176         for_each_label_withdel(l0, l) \
 177                 if (!(l)->deleted)
 178
 179 #define for_each_property_withdel(n, p) \
 180         for ((p) = (n)->proplist; (p); (p) = (p)->next)
 181
 182 #define for_each_property(n, p) \
 183         for_each_property_withdel(n, p) \
 184                 if (!(p)->deleted)
 185
 186 #define for_each_child_withdel(n, c) \
 187         for ((c) = (n)->children; (c); (c) = (c)->next_sibling)
 188
 189 #define for_each_child(n, c) \
 190         for_each_child_withdel(n, c) \
 191                 if (!(c)->deleted)
 192
 193 void add_label(struct label **labels, char *label);
 194 void delete_labels(struct label **labels);
 195
 196 struct property *build_property(char *name, struct data val,
 197                                 struct srcpos *srcpos);
 198 struct property *build_property_delete(char *name);
 199 struct property *chain_property(struct property *first, struct property *list);
 200 struct property *reverse_properties(struct property *first);
 201
 202 struct node *build_node(struct property *proplist, struct node *children,
 203                         struct srcpos *srcpos);
 204 struct node *build_node_delete(struct srcpos *srcpos);
 205 struct node *name_node(struct node *node, char *name);
 206 struct node *omit_node_if_unused(struct node *node);
 207 struct node *reference_node(struct node *node);
 208 struct node *chain_node(struct node *first, struct node *list);
 209 struct node *merge_nodes(struct node *old_node, struct node *new_node);
 210 struct node *add_orphan_node(struct node *old_node, struct node *new_node, char *ref);
 211
 212 void add_property(struct node *node, struct property *prop);
 213 void delete_property_by_name(struct node *node, char *name);
 214 void delete_property(struct property *prop);
 215 void add_child(struct node *parent, struct node *child);
 216 void delete_node_by_name(struct node *parent, char *name);
 217 void delete_node(struct node *node);
 218 void append_to_property(struct node *node,
 219                         char *name, const void *data, int len,
 220                         enum markertype type);
 221
 222 const char *get_unitname(struct node *node);
 223 struct property *get_property(struct node *node, const char *propname);
 224 cell_t propval_cell(struct property *prop);
 225 cell_t propval_cell_n(struct property *prop, int n);
 226 struct property *get_property_by_label(struct node *tree, const char *label,
 227                                        struct node **node);
 228 struct marker *get_marker_label(struct node *tree, const char *label,
 229                                 struct node **node, struct property **prop);
 230 struct node *get_subnode(struct node *node, const char *nodename);
 231 struct node *get_node_by_path(struct node *tree, const char *path);
 232 struct node *get_node_by_label(struct node *tree, const char *label);
 233 struct node *get_node_by_phandle(struct node *tree, cell_t phandle);
 234 struct node *get_node_by_ref(struct node *tree, const char *ref);
 235 cell_t get_node_phandle(struct node *root, struct node *node);
 236
 237 uint32_t guess_boot_cpuid(struct node *tree);
 238
 239 /* Boot info (tree plus memreserve information */
 240
 241 struct reserve_info {
 242         uint64_t address, size;
 243
 244         struct reserve_info *next;
 245
 246         struct label *labels;
 247 };
 248
 249 struct reserve_info *build_reserve_entry(uint64_t start, uint64_t len);
 250 struct reserve_info *chain_reserve_entry(struct reserve_info *first,
 251                                          struct reserve_info *list);
 252 struct reserve_info *add_reserve_entry(struct reserve_info *list,
 253                                        struct reserve_info *new);
 254
 255
 256 struct dt_info {
 257         unsigned int dtsflags;
 258         struct reserve_info *reservelist;
 259         uint32_t boot_cpuid_phys;
 260         struct node *dt;                /* the device tree */
 261         const char *outname;            /* filename being written to, "-" for stdout */
 262 };
 263
 264 /* DTS version flags definitions */
 265 #define DTSF_V1         0x0001  /* /dts-v1/ */
 266 #define DTSF_PLUGIN     0x0002  /* /plugin/ */
 267
 268 struct dt_info *build_dt_info(unsigned int dtsflags,
 269                               struct reserve_info *reservelist,
 270                               struct node *tree, uint32_t boot_cpuid_phys);
 271 void sort_tree(struct dt_info *dti);
 272 void generate_label_tree(struct dt_info *dti, char *name, bool allocph);
 273 void generate_fixups_tree(struct dt_info *dti, char *name);
 274 void generate_local_fixups_tree(struct dt_info *dti, char *name);
 275
 276 /* Checks */
 277
 278 void parse_checks_option(bool warn, bool error, const char *arg);
 279 void process_checks(bool force, struct dt_info *dti);
 280
 281 /* Flattened trees */
 282
 283 void dt_to_blob(FILE *f, struct dt_info *dti, int version);
 284 void dt_to_asm(FILE *f, struct dt_info *dti, int version);
 285
 286 struct dt_info *dt_from_blob(const char *fname);
 287
 288 /* Tree source */
 289
 290 void dt_to_source(FILE *f, struct dt_info *dti);
 291 struct dt_info *dt_from_source(const char *f);
 292
 293 /* YAML source */
 294
 295 void dt_to_yaml(FILE *f, struct dt_info *dti);
 296
 297 /* FS trees */
 298
 299 struct dt_info *dt_from_fs(const char *dirname);
 300
 301 #endif /* DTC_H */