include/asm-generic/global_data.h

   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 <cyclic.h>
  24 #include <event_internal.h>
  25 #include <fdtdec.h>
  26 #include <membuff.h>
  27 #include <linux/list.h>
  28 #include <linux/build_bug.h>
  29 #include <asm-offsets.h>
  30
  31 struct acpi_ctx;
  32 struct driver_rt;
  33
  34 typedef struct global_data gd_t;
  35
  36 /**
  37  * struct global_data - global data structure
  38  */
  39 struct global_data {
  40         /**
  41          * @bd: board information
  42          */
  43         struct bd_info *bd;
  44         /**
  45          * @flags: global data flags
  46          *
  47          * See &enum gd_flags
  48          */
  49         unsigned long flags;
  50         /**
  51          * @baudrate: baud rate of the serial interface
  52          */
  53         unsigned int baudrate;
  54         /**
  55          * @cpu_clk: CPU clock rate in Hz
  56          */
  57         unsigned long cpu_clk;
  58         /**
  59          * @bus_clk: platform clock rate in Hz
  60          */
  61         unsigned long bus_clk;
  62         /**
  63          * @pci_clk: PCI clock rate in Hz
  64          */
  65         /* We cannot bracket this with CONFIG_PCI due to mpc5xxx */
  66         unsigned long pci_clk;
  67         /**
  68          * @mem_clk: memory clock rate in Hz
  69          */
  70         unsigned long mem_clk;
  71 #if defined(CONFIG_VIDEO)
  72         /**
  73          * @fb_base: base address of frame buffer memory
  74          */
  75         unsigned long fb_base;
  76 #endif
  77 #if defined(CONFIG_POST)
  78         /**
  79          * @post_log_word: active POST tests
  80          *
  81          * @post_log_word is a bit mask defining which POST tests are recorded
  82          * (see constants POST_*).
  83          */
  84         unsigned long post_log_word;
  85         /**
  86          * @post_log_res: POST results
  87          *
  88          * @post_log_res is a bit mask with the POST results. A bit with value 1
  89          * indicates successful execution.
  90          */
  91         unsigned long post_log_res;
  92         /**
  93          * @post_init_f_time: time in ms when post_init_f() started
  94          */
  95         unsigned long post_init_f_time;
  96 #endif
  97 #ifdef CONFIG_BOARD_TYPES
  98         /**
  99          * @board_type: board type
 100          *
 101          * If a U-Boot configuration supports multiple board types, the actual
 102          * board type may be stored in this field.
 103          */
 104         unsigned long board_type;
 105 #endif
 106         /**
 107          * @have_console: console is available
 108          *
 109          * A value of 1 indicates that serial_init() was called and a console
 110          * is available.
 111          * A value of 0 indicates that console input and output drivers shall
 112          * not be called.
 113          */
 114         unsigned long have_console;
 115 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 116         /**
 117          * @precon_buf_idx: pre-console buffer index
 118          *
 119          * @precon_buf_idx indicates the current position of the
 120          * buffer used to collect output before the console becomes
 121          * available. When negative, the pre-console buffer is
 122          * temporarily disabled (used when the pre-console buffer is
 123          * being written out, to prevent adding its contents to
 124          * itself).
 125          */
 126         long precon_buf_idx;
 127 #endif
 128         /**
 129          * @env_addr: address of environment structure
 130          *
 131          * @env_addr contains the address of the structure holding the
 132          * environment variables.
 133          */
 134         unsigned long env_addr;
 135         /**
 136          * @env_valid: environment is valid
 137          *
 138          * See &enum env_valid
 139          */
 140         unsigned long env_valid;
 141         /**
 142          * @env_has_init: bit mask indicating environment locations
 143          *
 144          * &enum env_location defines which bit relates to which location
 145          */
 146         unsigned long env_has_init;
 147         /**
 148          * @env_load_prio: priority of the loaded environment
 149          */
 150         int env_load_prio;
 151         /**
 152          * @ram_base: base address of RAM used by U-Boot
 153          */
 154         unsigned long ram_base;
 155         /**
 156          * @ram_top: top address of RAM used by U-Boot
 157          */
 158         phys_addr_t ram_top;
 159         /**
 160          * @relocaddr: start address of U-Boot in RAM
 161          *
 162          * After relocation this field indicates the address to which U-Boot
 163          * has been relocated. It can be displayed using the bdinfo command.
 164          * Its value is needed to display the source code when debugging with
 165          * GDB using the 'add-symbol-file u-boot <relocaddr>' command.
 166          */
 167         unsigned long relocaddr;
 168         /**
 169          * @ram_size: RAM size in bytes
 170          */
 171         phys_size_t ram_size;
 172         /**
 173          * @mon_len: monitor length in bytes
 174          */
 175         unsigned long mon_len;
 176         /**
 177          * @irq_sp: IRQ stack pointer
 178          */
 179         unsigned long irq_sp;
 180         /**
 181          * @start_addr_sp: initial stack pointer address
 182          */
 183         unsigned long start_addr_sp;
 184         /**
 185          * @reloc_off: relocation offset
 186          */
 187         unsigned long reloc_off;
 188         /**
 189          * @new_gd: pointer to relocated global data
 190          */
 191         struct global_data *new_gd;
 192
 193 #ifdef CONFIG_DM
 194         /**
 195          * @dm_root: root instance for Driver Model
 196          */
 197         struct udevice *dm_root;
 198         /**
 199          * @dm_root_f: pre-relocation root instance
 200          */
 201         struct udevice *dm_root_f;
 202         /**
 203          * @uclass_root_s:
 204          * head of core tree when uclasses are not in read-only memory.
 205          *
 206          * When uclasses are in read-only memory, @uclass_root_s is not used and
 207          * @uclass_root points to the root node generated by dtoc.
 208          */
 209         struct list_head uclass_root_s;
 210         /**
 211          * @uclass_root:
 212          * pointer to head of core tree, if uclasses are in read-only memory and
 213          * cannot be adjusted to use @uclass_root as a list head.
 214          *
 215          * When not in read-only memory, @uclass_root_s is used to hold the
 216          * uclass root, and @uclass_root points to the address of
 217          * @uclass_root_s.
 218          */
 219         struct list_head *uclass_root;
 220 # if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT)
 221         /** @dm_driver_rt: Dynamic info about the driver */
 222         struct driver_rt *dm_driver_rt;
 223 # endif
 224 #if CONFIG_IS_ENABLED(OF_PLATDATA_RT)
 225         /** @dm_udevice_rt: Dynamic info about the udevice */
 226         struct udevice_rt *dm_udevice_rt;
 227         /**
 228          * @dm_priv_base: Base address of the priv/plat region used when
 229          * udevices and uclasses are in read-only memory. This is NULL if not
 230          * used
 231          */
 232         void *dm_priv_base;
 233 # endif
 234 #endif
 235 #ifdef CONFIG_TIMER
 236         /**
 237          * @timer: timer instance for Driver Model
 238          */
 239         struct udevice *timer;
 240 #endif
 241         /**
 242          * @fdt_blob: U-Boot's own device tree, NULL if none
 243          */
 244         const void *fdt_blob;
 245         /**
 246          * @new_fdt: relocated device tree
 247          */
 248         void *new_fdt;
 249         /**
 250          * @fdt_size: space reserved for relocated device space
 251          */
 252         unsigned long fdt_size;
 253         /**
 254          * @fdt_src: Source of FDT
 255          */
 256         enum fdt_source_t fdt_src;
 257 #if CONFIG_IS_ENABLED(OF_LIVE)
 258         /**
 259          * @of_root: root node of the live tree
 260          */
 261         struct device_node *of_root;
 262 #endif
 263
 264 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
 265         /**
 266          * @multi_dtb_fit: pointer to uncompressed multi-dtb FIT image
 267          */
 268         const void *multi_dtb_fit;
 269 #endif
 270         /**
 271          * @jt: jump table
 272          *
 273          * The jump table contains pointers to exported functions. A pointer to
 274          * the jump table is passed to standalone applications.
 275          */
 276         struct jt_funcs *jt;
 277         /**
 278          * @env_buf: buffer for env_get() before reloc
 279          */
 280         char env_buf[32];
 281 #ifdef CONFIG_TRACE
 282         /**
 283          * @trace_buff: trace buffer
 284          *
 285          * When tracing function in U-Boot this field points to the buffer
 286          * recording the function calls.
 287          */
 288         void *trace_buff;
 289 #endif
 290 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
 291         /**
 292          * @cur_i2c_bus: currently used I2C bus
 293          */
 294         int cur_i2c_bus;
 295 #endif
 296         /**
 297          * @timebase_h: high 32 bits of timer
 298          */
 299         unsigned int timebase_h;
 300         /**
 301          * @timebase_l: low 32 bits of timer
 302          */
 303         unsigned int timebase_l;
 304 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
 305         /**
 306          * @malloc_base: base address of early malloc()
 307          */
 308         unsigned long malloc_base;
 309         /**
 310          * @malloc_limit: limit address of early malloc()
 311          */
 312         unsigned long malloc_limit;
 313         /**
 314          * @malloc_ptr: current address of early malloc()
 315          */
 316         unsigned long malloc_ptr;
 317 #endif
 318 #ifdef CONFIG_PCI
 319         /**
 320          * @hose: PCI hose for early use
 321          */
 322         struct pci_controller *hose;
 323         /**
 324          * @pci_ram_top: top of region accessible to PCI
 325          */
 326         phys_addr_t pci_ram_top;
 327 #endif
 328 #ifdef CONFIG_PCI_BOOTDELAY
 329         /**
 330          * @pcidelay_done: delay time before scanning of PIC hose expired
 331          *
 332          * If CONFIG_PCI_BOOTDELAY=y, pci_hose_scan() waits for the number of
 333          * milliseconds defined by environment variable pcidelay before
 334          * scanning. Once this delay has expired the flag @pcidelay_done
 335          * is set to 1.
 336          */
 337         int pcidelay_done;
 338 #endif
 339         /**
 340          * @cur_serial_dev: current serial device
 341          */
 342         struct udevice *cur_serial_dev;
 343         /**
 344          * @arch: architecture-specific data
 345          */
 346         struct arch_global_data arch;
 347 #ifdef CONFIG_CONSOLE_RECORD
 348         /**
 349          * @console_out: output buffer for console recording
 350          *
 351          * This buffer is used to collect output during console recording.
 352          */
 353         struct membuff console_out;
 354         /**
 355          * @console_in: input buffer for console recording
 356          *
 357          * If console recording is activated, this buffer can be used to
 358          * emulate input.
 359          */
 360         struct membuff console_in;
 361 #endif
 362 #ifdef CONFIG_VIDEO
 363         /**
 364          * @video_top: top of video frame buffer area
 365          */
 366         ulong video_top;
 367         /**
 368          * @video_bottom: bottom of video frame buffer area
 369          */
 370         ulong video_bottom;
 371 #endif
 372 #ifdef CONFIG_BOOTSTAGE
 373         /**
 374          * @bootstage: boot stage information
 375          */
 376         struct bootstage_data *bootstage;
 377         /**
 378          * @new_bootstage: relocated boot stage information
 379          */
 380         struct bootstage_data *new_bootstage;
 381 #endif
 382 #ifdef CONFIG_LOG
 383         /**
 384          * @log_drop_count: number of dropped log messages
 385          *
 386          * This counter is incremented for each log message which can not
 387          * be processed because logging is not yet available as signaled by
 388          * flag %GD_FLG_LOG_READY in @flags.
 389          */
 390         int log_drop_count;
 391         /**
 392          * @default_log_level: default logging level
 393          *
 394          * For logging devices without filters @default_log_level defines the
 395          * logging level, cf. &enum log_level_t.
 396          */
 397         int default_log_level;
 398         /**
 399          * @log_head: list of logging devices
 400          */
 401         struct list_head log_head;
 402         /**
 403          * @log_fmt: bit mask for logging format
 404          *
 405          * The @log_fmt bit mask selects the fields to be shown in log messages.
 406          * &enum log_fmt defines the bits of the bit mask.
 407          */
 408         int log_fmt;
 409
 410         /**
 411          * @processing_msg: a log message is being processed
 412          *
 413          * This flag is used to suppress the creation of additional messages
 414          * while another message is being processed.
 415          */
 416         bool processing_msg;
 417         /**
 418          * @logc_prev: logging category of previous message
 419          *
 420          * This value is used as logging category for continuation messages.
 421          */
 422         int logc_prev;
 423         /**
 424          * @logl_prev: logging level of the previous message
 425          *
 426          * This value is used as logging level for continuation messages.
 427          */
 428         int logl_prev;
 429         /**
 430          * @log_cont: Previous log line did not finished wtih \n
 431          *
 432          * This allows for chained log messages on the same line
 433          */
 434         bool log_cont;
 435 #endif
 436 #if CONFIG_IS_ENABLED(BLOBLIST)
 437         /**
 438          * @bloblist: blob list information
 439          */
 440         struct bloblist_hdr *bloblist;
 441         /**
 442          * @new_bloblist: relocated blob list information
 443          */
 444         struct bloblist_hdr *new_bloblist;
 445 #endif
 446 #if CONFIG_IS_ENABLED(HANDOFF)
 447         /**
 448          * @spl_handoff: SPL hand-off information
 449          */
 450         struct spl_handoff *spl_handoff;
 451 #endif
 452 #if defined(CONFIG_TRANSLATION_OFFSET)
 453         /**
 454          * @translation_offset: optional translation offset
 455          *
 456          * See CONFIG_TRANSLATION_OFFSET.
 457          */
 458         fdt_addr_t translation_offset;
 459 #endif
 460 #ifdef CONFIG_GENERATE_ACPI_TABLE
 461         /**
 462          * @acpi_ctx: ACPI context pointer
 463          */
 464         struct acpi_ctx *acpi_ctx;
 465         /**
 466          * @acpi_start: Start address of ACPI tables
 467          */
 468         ulong acpi_start;
 469 #endif
 470 #if CONFIG_IS_ENABLED(GENERATE_SMBIOS_TABLE)
 471         /**
 472          * @smbios_version: Points to SMBIOS type 0 version
 473          */
 474         char *smbios_version;
 475 #endif
 476 #if CONFIG_IS_ENABLED(EVENT)
 477         /**
 478          * @event_state: Points to the current state of events
 479          */
 480         struct event_state event_state;
 481 #endif
 482 #ifdef CONFIG_CYCLIC
 483         /**
 484          * @cyclic_list: list of registered cyclic functions
 485          */
 486         struct hlist_head cyclic_list;
 487 #endif
 488         /**
 489          * @dmtag_list: List of DM tags
 490          */
 491         struct list_head dmtag_list;
 492 };
 493 #ifndef DO_DEPS_ONLY
 494 static_assert(sizeof(struct global_data) == GD_SIZE);
 495 #endif
 496
 497 /**
 498  * gd_board_type() - retrieve board type
 499  *
 500  * Return: global board type
 501  */
 502 #ifdef CONFIG_BOARD_TYPES
 503 #define gd_board_type()         gd->board_type
 504 #else
 505 #define gd_board_type()         0
 506 #endif
 507
 508 /* These macros help avoid #ifdefs in the code */
 509 #if CONFIG_IS_ENABLED(OF_LIVE)
 510 #define gd_of_root()            gd->of_root
 511 #define gd_of_root_ptr()        &gd->of_root
 512 #define gd_set_of_root(_root)   gd->of_root = (_root)
 513 #else
 514 #define gd_of_root()            NULL
 515 #define gd_of_root_ptr()        NULL
 516 #define gd_set_of_root(_root)
 517 #endif
 518
 519 #if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT)
 520 #define gd_set_dm_driver_rt(dyn)        gd->dm_driver_rt = dyn
 521 #define gd_dm_driver_rt()               gd->dm_driver_rt
 522 #else
 523 #define gd_set_dm_driver_rt(dyn)
 524 #define gd_dm_driver_rt()               NULL
 525 #endif
 526
 527 #if CONFIG_IS_ENABLED(OF_PLATDATA_RT)
 528 #define gd_set_dm_udevice_rt(dyn)       gd->dm_udevice_rt = dyn
 529 #define gd_dm_udevice_rt()              gd->dm_udevice_rt
 530 #define gd_set_dm_priv_base(dyn)        gd->dm_priv_base = dyn
 531 #define gd_dm_priv_base()               gd->dm_priv_base
 532 #else
 533 #define gd_set_dm_udevice_rt(dyn)
 534 #define gd_dm_udevice_rt()              NULL
 535 #define gd_set_dm_priv_base(dyn)
 536 #define gd_dm_priv_base()               NULL
 537 #endif
 538
 539 #ifdef CONFIG_GENERATE_ACPI_TABLE
 540 #define gd_acpi_ctx()           gd->acpi_ctx
 541 #define gd_acpi_start()         gd->acpi_start
 542 #define gd_set_acpi_start(addr) gd->acpi_start = addr
 543 #else
 544 #define gd_acpi_ctx()           NULL
 545 #define gd_acpi_start()         0UL
 546 #define gd_set_acpi_start(addr)
 547 #endif
 548
 549 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
 550 #define gd_multi_dtb_fit()      gd->multi_dtb_fit
 551 #define gd_set_multi_dtb_fit(_dtb)      gd->multi_dtb_fit = _dtb
 552 #else
 553 #define gd_multi_dtb_fit()      NULL
 554 #define gd_set_multi_dtb_fit(_dtb)
 555 #endif
 556
 557 #if CONFIG_IS_ENABLED(EVENT_DYNAMIC)
 558 #define gd_event_state()        ((struct event_state *)&gd->event_state)
 559 #else
 560 #define gd_event_state()        NULL
 561 #endif
 562
 563 /**
 564  * enum gd_flags - global data flags
 565  *
 566  * See field flags of &struct global_data.
 567  */
 568 enum gd_flags {
 569         /**
 570          * @GD_FLG_RELOC: code was relocated to RAM
 571          */
 572         GD_FLG_RELOC = 0x00001,
 573         /**
 574          * @GD_FLG_DEVINIT: devices have been initialized
 575          */
 576         GD_FLG_DEVINIT = 0x00002,
 577         /**
 578          * @GD_FLG_SILENT: silent mode
 579          */
 580         GD_FLG_SILENT = 0x00004,
 581         /**
 582          * @GD_FLG_POSTFAIL: critical POST test failed
 583          */
 584         GD_FLG_POSTFAIL = 0x00008,
 585         /**
 586          * @GD_FLG_POSTSTOP: POST sequence aborted
 587          */
 588         GD_FLG_POSTSTOP = 0x00010,
 589         /**
 590          * @GD_FLG_LOGINIT: log Buffer has been initialized
 591          */
 592         GD_FLG_LOGINIT = 0x00020,
 593         /**
 594          * @GD_FLG_DISABLE_CONSOLE: disable console (in & out)
 595          */
 596         GD_FLG_DISABLE_CONSOLE = 0x00040,
 597         /**
 598          * @GD_FLG_ENV_READY: environment imported into hash table
 599          */
 600         GD_FLG_ENV_READY = 0x00080,
 601         /**
 602          * @GD_FLG_SERIAL_READY: pre-relocation serial console ready
 603          */
 604         GD_FLG_SERIAL_READY = 0x00100,
 605         /**
 606          * @GD_FLG_FULL_MALLOC_INIT: full malloc() is ready
 607          */
 608         GD_FLG_FULL_MALLOC_INIT = 0x00200,
 609         /**
 610          * @GD_FLG_SPL_INIT: spl_init() has been called
 611          */
 612         GD_FLG_SPL_INIT = 0x00400,
 613         /**
 614          * @GD_FLG_SKIP_RELOC: don't relocate
 615          */
 616         GD_FLG_SKIP_RELOC = 0x00800,
 617         /**
 618          * @GD_FLG_RECORD: record console
 619          */
 620         GD_FLG_RECORD = 0x01000,
 621         /**
 622          * @GD_FLG_RECORD_OVF: record console overflow
 623          */
 624         GD_FLG_RECORD_OVF = 0x02000,
 625         /**
 626          * @GD_FLG_ENV_DEFAULT: default variable flag
 627          */
 628         GD_FLG_ENV_DEFAULT = 0x04000,
 629         /**
 630          * @GD_FLG_SPL_EARLY_INIT: early SPL initialization is done
 631          */
 632         GD_FLG_SPL_EARLY_INIT = 0x08000,
 633         /**
 634          * @GD_FLG_LOG_READY: log system is ready for use
 635          */
 636         GD_FLG_LOG_READY = 0x10000,
 637         /**
 638          * @GD_FLG_CYCLIC_RUNNING: cyclic_run is in progress
 639          */
 640         GD_FLG_CYCLIC_RUNNING = 0x20000,
 641         /**
 642          * @GD_FLG_SKIP_LL_INIT: don't perform low-level initialization
 643          */
 644         GD_FLG_SKIP_LL_INIT = 0x40000,
 645         /**
 646          * @GD_FLG_SMP_READY: SMP initialization is complete
 647          */
 648         GD_FLG_SMP_READY = 0x80000,
 649         /**
 650          * @GD_FLG_FDT_CHANGED: Device tree change has been detected by tests
 651          */
 652         GD_FLG_FDT_CHANGED = 0x100000,
 653         /**
 654          * @GD_FLG_OF_TAG_MIGRATE: Device tree has old u-boot,dm- tags
 655          */
 656         GD_FLG_OF_TAG_MIGRATE = 0x200000,
 657 };
 658
 659 #endif /* __ASSEMBLY__ */
 660
 661 #endif /* __ASM_GENERIC_GBL_DATA_H */