1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * Copyright (c) 2012 The Chromium OS Authors. 4 * (C) Copyright 2002-2010 5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 6 */ 7 8#ifndef __ASM_GENERIC_GBL_DATA_H 9#define __ASM_GENERIC_GBL_DATA_H 10/* 11 * The following data structure is placed in some memory which is 12 * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or 13 * some locked parts of the data cache) to allow for a minimum set of 14 * global variables during system initialization (until we have set 15 * up the memory controller so that we can use RAM). 16 * 17 * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t) 18 * 19 * Each architecture has its own private fields. For now all are private 20 */ 21 22#ifndef __ASSEMBLY__ 23#include <event_internal.h> 24#include <fdtdec.h> 25#include <membuff.h> 26#include <linux/list.h> 27#include <linux/build_bug.h> 28#include <asm-offsets.h> 29 30struct acpi_ctx; 31struct driver_rt; 32 33typedef struct global_data gd_t; 34 35/** 36 * struct global_data - global data structure 37 */ 38struct global_data { 39 /** 40 * @bd: board information 41 */ 42 struct bd_info *bd; 43 /** 44 * @flags: global data flags 45 * 46 * See &enum gd_flags 47 */ 48 unsigned long flags; 49 /** 50 * @baudrate: baud rate of the serial interface 51 */ 52 unsigned int baudrate; 53 /** 54 * @cpu_clk: CPU clock rate in Hz 55 */ 56 unsigned long cpu_clk; 57 /** 58 * @bus_clk: platform clock rate in Hz 59 */ 60 unsigned long bus_clk; 61 /** 62 * @pci_clk: PCI clock rate in Hz 63 */ 64 /* We cannot bracket this with CONFIG_PCI due to mpc5xxx */ 65 unsigned long pci_clk; 66 /** 67 * @mem_clk: memory clock rate in Hz 68 */ 69 unsigned long mem_clk; 70#if defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO) 71 /** 72 * @fb_base: base address of frame buffer memory 73 */ 74 unsigned long fb_base; 75#endif 76#if defined(CONFIG_POST) 77 /** 78 * @post_log_word: active POST tests 79 * 80 * @post_log_word is a bit mask defining which POST tests are recorded 81 * (see constants POST_*). 82 */ 83 unsigned long post_log_word; 84 /** 85 * @post_log_res: POST results 86 * 87 * @post_log_res is a bit mask with the POST results. A bit with value 1 88 * indicates successful execution. 89 */ 90 unsigned long post_log_res; 91 /** 92 * @post_init_f_time: time in ms when post_init_f() started 93 */ 94 unsigned long post_init_f_time; 95#endif 96#ifdef CONFIG_BOARD_TYPES 97 /** 98 * @board_type: board type 99 * 100 * If a U-Boot configuration supports multiple board types, the actual 101 * board type may be stored in this field. 102 */ 103 unsigned long board_type; 104#endif 105 /** 106 * @have_console: console is available 107 * 108 * A value of 1 indicates that serial_init() was called and a console 109 * is available. 110 * A value of 0 indicates that console input and output drivers shall 111 * not be called. 112 */ 113 unsigned long have_console; 114#if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER) 115 /** 116 * @precon_buf_idx: pre-console buffer index 117 * 118 * @precon_buf_idx indicates the current position of the buffer used to 119 * collect output before the console becomes available 120 */ 121 unsigned long precon_buf_idx; 122#endif 123 /** 124 * @env_addr: address of environment structure 125 * 126 * @env_addr contains the address of the structure holding the 127 * environment variables. 128 */ 129 unsigned long env_addr; 130 /** 131 * @env_valid: environment is valid 132 * 133 * See &enum env_valid 134 */ 135 unsigned long env_valid; 136 /** 137 * @env_has_init: bit mask indicating environment locations 138 * 139 * &enum env_location defines which bit relates to which location 140 */ 141 unsigned long env_has_init; 142 /** 143 * @env_load_prio: priority of the loaded environment 144 */ 145 int env_load_prio; 146 /** 147 * @ram_base: base address of RAM used by U-Boot 148 */ 149 unsigned long ram_base; 150 /** 151 * @ram_top: top address of RAM used by U-Boot 152 */ 153 phys_addr_t ram_top; 154 /** 155 * @relocaddr: start address of U-Boot in RAM 156 * 157 * After relocation this field indicates the address to which U-Boot 158 * has been relocated. It can be displayed using the bdinfo command. 159 * Its value is needed to display the source code when debugging with 160 * GDB using the 'add-symbol-file u-boot <relocaddr>' command. 161 */ 162 unsigned long relocaddr; 163 /** 164 * @ram_size: RAM size in bytes 165 */ 166 phys_size_t ram_size; 167 /** 168 * @mon_len: monitor length in bytes 169 */ 170 unsigned long mon_len; 171 /** 172 * @irq_sp: IRQ stack pointer 173 */ 174 unsigned long irq_sp; 175 /** 176 * @start_addr_sp: initial stack pointer address 177 */ 178 unsigned long start_addr_sp; 179 /** 180 * @reloc_off: relocation offset 181 */ 182 unsigned long reloc_off; 183 /** 184 * @new_gd: pointer to relocated global data 185 */ 186 struct global_data *new_gd; 187 188#ifdef CONFIG_DM 189 /** 190 * @dm_root: root instance for Driver Model 191 */ 192 struct udevice *dm_root; 193 /** 194 * @dm_root_f: pre-relocation root instance 195 */ 196 struct udevice *dm_root_f; 197 /** 198 * @uclass_root_s: 199 * head of core tree when uclasses are not in read-only memory. 200 * 201 * When uclasses are in read-only memory, @uclass_root_s is not used and 202 * @uclass_root points to the root node generated by dtoc. 203 */ 204 struct list_head uclass_root_s; 205 /** 206 * @uclass_root: 207 * pointer to head of core tree, if uclasses are in read-only memory and 208 * cannot be adjusted to use @uclass_root as a list head. 209 * 210 * When not in read-only memory, @uclass_root_s is used to hold the 211 * uclass root, and @uclass_root points to the address of 212 * @uclass_root_s. 213 */ 214 struct list_head *uclass_root; 215# if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT) 216 /** @dm_driver_rt: Dynamic info about the driver */ 217 struct driver_rt *dm_driver_rt; 218# endif 219#if CONFIG_IS_ENABLED(OF_PLATDATA_RT) 220 /** @dm_udevice_rt: Dynamic info about the udevice */ 221 struct udevice_rt *dm_udevice_rt; 222 /** 223 * @dm_priv_base: Base address of the priv/plat region used when 224 * udevices and uclasses are in read-only memory. This is NULL if not 225 * used 226 */ 227 void *dm_priv_base; 228# endif 229#endif 230#ifdef CONFIG_TIMER 231 /** 232 * @timer: timer instance for Driver Model 233 */ 234 struct udevice *timer; 235#endif 236 /** 237 * @fdt_blob: U-Boot's own device tree, NULL if none 238 */ 239 const void *fdt_blob; 240 /** 241 * @new_fdt: relocated device tree 242 */ 243 void *new_fdt; 244 /** 245 * @fdt_size: space reserved for relocated device space 246 */ 247 unsigned long fdt_size; 248 /** 249 * @fdt_src: Source of FDT 250 */ 251 enum fdt_source_t fdt_src; 252#if CONFIG_IS_ENABLED(OF_LIVE) 253 /** 254 * @of_root: root node of the live tree 255 */ 256 struct device_node *of_root; 257#endif 258 259#if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 260 /** 261 * @multi_dtb_fit: pointer to uncompressed multi-dtb FIT image 262 */ 263 const void *multi_dtb_fit; 264#endif 265 /** 266 * @jt: jump table 267 * 268 * The jump table contains pointers to exported functions. A pointer to 269 * the jump table is passed to standalone applications. 270 */ 271 struct jt_funcs *jt; 272 /** 273 * @env_buf: buffer for env_get() before reloc 274 */ 275 char env_buf[32]; 276#ifdef CONFIG_TRACE 277 /** 278 * @trace_buff: trace buffer 279 * 280 * When tracing function in U-Boot this field points to the buffer 281 * recording the function calls. 282 */ 283 void *trace_buff; 284#endif 285#if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) 286 /** 287 * @cur_i2c_bus: currently used I2C bus 288 */ 289 int cur_i2c_bus; 290#endif 291 /** 292 * @timebase_h: high 32 bits of timer 293 */ 294 unsigned int timebase_h; 295 /** 296 * @timebase_l: low 32 bits of timer 297 */ 298 unsigned int timebase_l; 299#if CONFIG_VAL(SYS_MALLOC_F_LEN) 300 /** 301 * @malloc_base: base address of early malloc() 302 */ 303 unsigned long malloc_base; 304 /** 305 * @malloc_limit: limit address of early malloc() 306 */ 307 unsigned long malloc_limit; 308 /** 309 * @malloc_ptr: current address of early malloc() 310 */ 311 unsigned long malloc_ptr; 312#endif 313#ifdef CONFIG_PCI 314 /** 315 * @hose: PCI hose for early use 316 */ 317 struct pci_controller *hose; 318 /** 319 * @pci_ram_top: top of region accessible to PCI 320 */ 321 phys_addr_t pci_ram_top; 322#endif 323#ifdef CONFIG_PCI_BOOTDELAY 324 /** 325 * @pcidelay_done: delay time before scanning of PIC hose expired 326 * 327 * If CONFIG_PCI_BOOTDELAY=y, pci_hose_scan() waits for the number of 328 * milliseconds defined by environment variable pcidelay before 329 * scanning. Once this delay has expired the flag @pcidelay_done 330 * is set to 1. 331 */ 332 int pcidelay_done; 333#endif 334 /** 335 * @cur_serial_dev: current serial device 336 */ 337 struct udevice *cur_serial_dev; 338 /** 339 * @arch: architecture-specific data 340 */ 341 struct arch_global_data arch; 342#ifdef CONFIG_CONSOLE_RECORD 343 /** 344 * @console_out: output buffer for console recording 345 * 346 * This buffer is used to collect output during console recording. 347 */ 348 struct membuff console_out; 349 /** 350 * @console_in: input buffer for console recording 351 * 352 * If console recording is activated, this buffer can be used to 353 * emulate input. 354 */ 355 struct membuff console_in; 356#endif 357#ifdef CONFIG_DM_VIDEO 358 /** 359 * @video_top: top of video frame buffer area 360 */ 361 ulong video_top; 362 /** 363 * @video_bottom: bottom of video frame buffer area 364 */ 365 ulong video_bottom; 366#endif 367#ifdef CONFIG_BOOTSTAGE 368 /** 369 * @bootstage: boot stage information 370 */ 371 struct bootstage_data *bootstage; 372 /** 373 * @new_bootstage: relocated boot stage information 374 */ 375 struct bootstage_data *new_bootstage; 376#endif 377#ifdef CONFIG_LOG 378 /** 379 * @log_drop_count: number of dropped log messages 380 * 381 * This counter is incremented for each log message which can not 382 * be processed because logging is not yet available as signaled by 383 * flag %GD_FLG_LOG_READY in @flags. 384 */ 385 int log_drop_count; 386 /** 387 * @default_log_level: default logging level 388 * 389 * For logging devices without filters @default_log_level defines the 390 * logging level, cf. &enum log_level_t. 391 */ 392 int default_log_level; 393 /** 394 * @log_head: list of logging devices 395 */ 396 struct list_head log_head; 397 /** 398 * @log_fmt: bit mask for logging format 399 * 400 * The @log_fmt bit mask selects the fields to be shown in log messages. 401 * &enum log_fmt defines the bits of the bit mask. 402 */ 403 int log_fmt; 404 405 /** 406 * @processing_msg: a log message is being processed 407 * 408 * This flag is used to suppress the creation of additional messages 409 * while another message is being processed. 410 */ 411 bool processing_msg; 412 /** 413 * @logc_prev: logging category of previous message 414 * 415 * This value is used as logging category for continuation messages. 416 */ 417 int logc_prev; 418 /** 419 * @logl_prev: logging level of the previous message 420 * 421 * This value is used as logging level for continuation messages. 422 */ 423 int logl_prev; 424 /** 425 * @log_cont: Previous log line did not finished wtih \n 426 * 427 * This allows for chained log messages on the same line 428 */ 429 bool log_cont; 430#endif 431#if CONFIG_IS_ENABLED(BLOBLIST) 432 /** 433 * @bloblist: blob list information 434 */ 435 struct bloblist_hdr *bloblist; 436 /** 437 * @new_bloblist: relocated blob list information 438 */ 439 struct bloblist_hdr *new_bloblist; 440#endif 441#if CONFIG_IS_ENABLED(HANDOFF) 442 /** 443 * @spl_handoff: SPL hand-off information 444 */ 445 struct spl_handoff *spl_handoff; 446#endif 447#if defined(CONFIG_TRANSLATION_OFFSET) 448 /** 449 * @translation_offset: optional translation offset 450 * 451 * See CONFIG_TRANSLATION_OFFSET. 452 */ 453 fdt_addr_t translation_offset; 454#endif 455#ifdef CONFIG_GENERATE_ACPI_TABLE 456 /** 457 * @acpi_ctx: ACPI context pointer 458 */ 459 struct acpi_ctx *acpi_ctx; 460 /** 461 * @acpi_start: Start address of ACPI tables 462 */ 463 ulong acpi_start; 464#endif 465#if CONFIG_IS_ENABLED(GENERATE_SMBIOS_TABLE) 466 /** 467 * @smbios_version: Points to SMBIOS type 0 version 468 */ 469 char *smbios_version; 470#endif 471#if CONFIG_IS_ENABLED(EVENT) 472 /** 473 * @event_state: Points to the current state of events 474 */ 475 struct event_state event_state; 476#endif 477 /** 478 * @dmtag_list: List of DM tags 479 */ 480 struct list_head dmtag_list; 481}; 482#ifndef DO_DEPS_ONLY 483static_assert(sizeof(struct global_data) == GD_SIZE); 484#endif 485 486/** 487 * gd_board_type() - retrieve board type 488 * 489 * Return: global board type 490 */ 491#ifdef CONFIG_BOARD_TYPES 492#define gd_board_type() gd->board_type 493#else 494#define gd_board_type() 0 495#endif 496 497/* These macros help avoid #ifdefs in the code */ 498#if CONFIG_IS_ENABLED(OF_LIVE) 499#define gd_of_root() gd->of_root 500#define gd_of_root_ptr() &gd->of_root 501#define gd_set_of_root(_root) gd->of_root = (_root) 502#else 503#define gd_of_root() NULL 504#define gd_of_root_ptr() NULL 505#define gd_set_of_root(_root) 506#endif 507 508#if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT) 509#define gd_set_dm_driver_rt(dyn) gd->dm_driver_rt = dyn 510#define gd_dm_driver_rt() gd->dm_driver_rt 511#else 512#define gd_set_dm_driver_rt(dyn) 513#define gd_dm_driver_rt() NULL 514#endif 515 516#if CONFIG_IS_ENABLED(OF_PLATDATA_RT) 517#define gd_set_dm_udevice_rt(dyn) gd->dm_udevice_rt = dyn 518#define gd_dm_udevice_rt() gd->dm_udevice_rt 519#define gd_set_dm_priv_base(dyn) gd->dm_priv_base = dyn 520#define gd_dm_priv_base() gd->dm_priv_base 521#else 522#define gd_set_dm_udevice_rt(dyn) 523#define gd_dm_udevice_rt() NULL 524#define gd_set_dm_priv_base(dyn) 525#define gd_dm_priv_base() NULL 526#endif 527 528#ifdef CONFIG_GENERATE_ACPI_TABLE 529#define gd_acpi_ctx() gd->acpi_ctx 530#define gd_acpi_start() gd->acpi_start 531#define gd_set_acpi_start(addr) gd->acpi_start = addr 532#else 533#define gd_acpi_ctx() NULL 534#define gd_acpi_start() 0UL 535#define gd_set_acpi_start(addr) 536#endif 537 538#if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 539#define gd_multi_dtb_fit() gd->multi_dtb_fit 540#define gd_set_multi_dtb_fit(_dtb) gd->multi_dtb_fit = _dtb 541#else 542#define gd_multi_dtb_fit() NULL 543#define gd_set_multi_dtb_fit(_dtb) 544#endif 545 546#if CONFIG_IS_ENABLED(EVENT_DYNAMIC) 547#define gd_event_state() ((struct event_state *)&gd->event_state) 548#else 549#define gd_event_state() NULL 550#endif 551 552/** 553 * enum gd_flags - global data flags 554 * 555 * See field flags of &struct global_data. 556 */ 557enum gd_flags { 558 /** 559 * @GD_FLG_RELOC: code was relocated to RAM 560 */ 561 GD_FLG_RELOC = 0x00001, 562 /** 563 * @GD_FLG_DEVINIT: devices have been initialized 564 */ 565 GD_FLG_DEVINIT = 0x00002, 566 /** 567 * @GD_FLG_SILENT: silent mode 568 */ 569 GD_FLG_SILENT = 0x00004, 570 /** 571 * @GD_FLG_POSTFAIL: critical POST test failed 572 */ 573 GD_FLG_POSTFAIL = 0x00008, 574 /** 575 * @GD_FLG_POSTSTOP: POST sequence aborted 576 */ 577 GD_FLG_POSTSTOP = 0x00010, 578 /** 579 * @GD_FLG_LOGINIT: log Buffer has been initialized 580 */ 581 GD_FLG_LOGINIT = 0x00020, 582 /** 583 * @GD_FLG_DISABLE_CONSOLE: disable console (in & out) 584 */ 585 GD_FLG_DISABLE_CONSOLE = 0x00040, 586 /** 587 * @GD_FLG_ENV_READY: environment imported into hash table 588 */ 589 GD_FLG_ENV_READY = 0x00080, 590 /** 591 * @GD_FLG_SERIAL_READY: pre-relocation serial console ready 592 */ 593 GD_FLG_SERIAL_READY = 0x00100, 594 /** 595 * @GD_FLG_FULL_MALLOC_INIT: full malloc() is ready 596 */ 597 GD_FLG_FULL_MALLOC_INIT = 0x00200, 598 /** 599 * @GD_FLG_SPL_INIT: spl_init() has been called 600 */ 601 GD_FLG_SPL_INIT = 0x00400, 602 /** 603 * @GD_FLG_SKIP_RELOC: don't relocate 604 */ 605 GD_FLG_SKIP_RELOC = 0x00800, 606 /** 607 * @GD_FLG_RECORD: record console 608 */ 609 GD_FLG_RECORD = 0x01000, 610 /** 611 * @GD_FLG_RECORD_OVF: record console overflow 612 */ 613 GD_FLG_RECORD_OVF = 0x02000, 614 /** 615 * @GD_FLG_ENV_DEFAULT: default variable flag 616 */ 617 GD_FLG_ENV_DEFAULT = 0x04000, 618 /** 619 * @GD_FLG_SPL_EARLY_INIT: early SPL initialization is done 620 */ 621 GD_FLG_SPL_EARLY_INIT = 0x08000, 622 /** 623 * @GD_FLG_LOG_READY: log system is ready for use 624 */ 625 GD_FLG_LOG_READY = 0x10000, 626 /** 627 * @GD_FLG_WDT_READY: watchdog is ready for use 628 */ 629 GD_FLG_WDT_READY = 0x20000, 630 /** 631 * @GD_FLG_SKIP_LL_INIT: don't perform low-level initialization 632 */ 633 GD_FLG_SKIP_LL_INIT = 0x40000, 634 /** 635 * @GD_FLG_SMP_READY: SMP initialization is complete 636 */ 637 GD_FLG_SMP_READY = 0x80000, 638}; 639 640#endif /* __ASSEMBLY__ */ 641 642#endif /* __ASM_GENERIC_GBL_DATA_H */ 643