u-boot/include/asm-generic/global_data.h
Heinrich Schuchardt 0c7cd15f3f global_data.h: add Sphinx documentation
Add the missing Sphinx documentation for struct global_data and
gd_board_type().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-14 11:16:34 -04:00

496 lines
11 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2012 The Chromium OS Authors.
* (C) Copyright 2002-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#ifndef __ASM_GENERIC_GBL_DATA_H
#define __ASM_GENERIC_GBL_DATA_H
/*
* The following data structure is placed in some memory which is
* available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
* some locked parts of the data cache) to allow for a minimum set of
* global variables during system initialization (until we have set
* up the memory controller so that we can use RAM).
*
* Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
*
* Each architecture has its own private fields. For now all are private
*/
#ifndef __ASSEMBLY__
#include <fdtdec.h>
#include <membuff.h>
#include <linux/list.h>
typedef struct global_data gd_t;
/**
* struct global_data - global data structure
*/
struct global_data {
/**
* @bd: board information
*/
struct bd_info *bd;
/**
* @flags: global data flags
*
* See &enum gd_flags
*/
unsigned long flags;
/**
* @baudrate: baud rate of the serial interface
*/
unsigned int baudrate;
/**
* @cpu_clk: CPU clock rate in Hz
*/
unsigned long cpu_clk;
/**
* @bus_clk: platform clock rate in Hz
*/
unsigned long bus_clk;
/**
* @pci_clk: PCI clock rate in Hz
*/
/* We cannot bracket this with CONFIG_PCI due to mpc5xxx */
unsigned long pci_clk;
/**
* @mem_clk: memory clock rate in Hz
*/
unsigned long mem_clk;
#if defined(CONFIG_LCD) || defined(CONFIG_VIDEO) || defined(CONFIG_DM_VIDEO)
/**
* @fb_base: base address of frame buffer memory
*/
unsigned long fb_base;
#endif
#if defined(CONFIG_POST)
/**
* @post_log_word: active POST tests
*
* @post_log_word is a bit mask defining which POST tests are recorded
* (see constants POST_*).
*/
unsigned long post_log_word;
/**
* @post_log_res: POST results
*
* @post_log_res is a bit mask with the POST results. A bit with value 1
* indicates successful execution.
*/
unsigned long post_log_res;
/**
* @post_init_f_time: time in ms when post_init_f() started
*/
unsigned long post_init_f_time;
#endif
#ifdef CONFIG_BOARD_TYPES
/**
* @board_type: board type
*
* If a U-Boot configuration supports multiple board types, the actual
* board type may be stored in this field.
*/
unsigned long board_type;
#endif
/**
* @have_console: console is available
*
* A value of 1 indicates that serial_init() was called and a console
* is available.
* A value of 0 indicates that console input and output drivers shall
* not be called.
*/
unsigned long have_console;
#if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
/**
* @precon_buf_idx: pre-console buffer index
*
* @precon_buf_idx indicates the current position of the buffer used to
* collect output before the console becomes available
*/
unsigned long precon_buf_idx;
#endif
/**
* @env_addr: address of environment structure
*
* @env_addr contains the address of the structure holding the
* environment variables.
*/
unsigned long env_addr;
/**
* @env_valid: environment is valid
*
* See &enum env_valid
*/
unsigned long env_valid;
/**
* @env_has_init: bit mask indicating environment locations
*
* &enum env_location defines which bit relates to which location
*/
unsigned long env_has_init;
/**
* @env_load_prio: priority of the loaded environment
*/
int env_load_prio;
/**
* @ram_base: base address of RAM used by U-Boot
*/
unsigned long ram_base;
/**
* @ram_top: top address of RAM used by U-Boot
*/
unsigned long ram_top;
/**
* @relocaddr: start address of U-Boot in RAM
*
* After relocation this field indicates the address to which U-Boot
* has been relocated. It can be displayed using the bdinfo command.
* Its value is needed to display the source code when debugging with
* GDB using the 'add-symbol-file u-boot <relocaddr>' command.
*/
unsigned long relocaddr;
/**
* @ram_size: RAM size in bytes
*/
phys_size_t ram_size;
/**
* @mon_len: monitor length in bytes
*/
unsigned long mon_len;
/**
* @irq_sp: IRQ stack pointer
*/
unsigned long irq_sp;
/**
* @start_addr_sp: initial stack pointer address
*/
unsigned long start_addr_sp;
/**
* @reloc_off: relocation offset
*/
unsigned long reloc_off;
/**
* @new_gd: pointer to relocated global data
*/
struct global_data *new_gd;
#ifdef CONFIG_DM
/**
* @dm_root: root instance for Driver Model
*/
struct udevice *dm_root;
/**
* @dm_root_f: pre-relocation root instance
*/
struct udevice *dm_root_f;
/**
* @uclass_root: head of core tree
*/
struct list_head uclass_root;
#endif
#ifdef CONFIG_TIMER
/**
* @timer: timer instance for Driver Model
*/
struct udevice *timer;
#endif
/**
* @fdt_blob: U-Boot's own device tree, NULL if none
*/
const void *fdt_blob;
/**
* @new_fdt: relocated device tree
*/
void *new_fdt;
/**
* @fdt_size: space reserved for relocated device space
*/
unsigned long fdt_size;
#ifdef CONFIG_OF_LIVE
/**
* @of_root: root node of the live tree
*/
struct device_node *of_root;
#endif
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
/**
* @multi_dtb_fit: pointer to uncompressed multi-dtb FIT image
*/
const void *multi_dtb_fit;
#endif
/**
* @jt: jump table
*
* The jump table contains pointers to exported functions. A pointer to
* the jump table is passed to standalone applications.
*/
struct jt_funcs *jt;
/**
* @env_buf: buffer for env_get() before reloc
*/
char env_buf[32];
#ifdef CONFIG_TRACE
/**
* @trace_buff: trace buffer
*
* When tracing function in U-Boot this field points to the buffer
* recording the function calls.
*/
void *trace_buff;
#endif
#if defined(CONFIG_SYS_I2C)
/**
* @cur_i2c_bus: currently used I2C bus
*/
int cur_i2c_bus;
#endif
/**
* @timebase_h: high 32 bits of timer
*/
unsigned int timebase_h;
/**
* @timebase_l: low 32 bits of timer
*/
unsigned int timebase_l;
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
/**
* @malloc_base: base address of early malloc()
*/
unsigned long malloc_base;
/**
* @malloc_limit: limit address of early malloc()
*/
unsigned long malloc_limit;
/**
* @malloc_ptr: current address of early malloc()
*/
unsigned long malloc_ptr;
#endif
#ifdef CONFIG_PCI
/**
* @hose: PCI hose for early use
*/
struct pci_controller *hose;
/**
* @pci_ram_top: top of region accessible to PCI
*/
phys_addr_t pci_ram_top;
#endif
#ifdef CONFIG_PCI_BOOTDELAY
/**
* @pcidelay_done: delay time before scanning of PIC hose expired
*
* If CONFIG_PCI_BOOTDELAY=y, pci_hose_scan() waits for the number of
* milliseconds defined by environment variable pcidelay before
* scanning. Once this delay has expired the flag @pcidelay_done
* is set to 1.
*/
int pcidelay_done;
#endif
/**
* @cur_serial_dev: current serial device
*/
struct udevice *cur_serial_dev;
/**
* @arch: architecture-specific data
*/
struct arch_global_data arch;
#ifdef CONFIG_CONSOLE_RECORD
/**
* @console_out: output buffer for console recording
*
* This buffer is used to collect output during console recording.
*/
struct membuff console_out;
/**
* @console_in: input buffer for console recording
*
* If console recording is activated, this buffer can be used to
* emulate input.
*/
struct membuff console_in;
#endif
#ifdef CONFIG_DM_VIDEO
/**
* @video_top: top of video frame buffer area
*/
ulong video_top;
/**
* @video_bottom: bottom of video frame buffer area
*/
ulong video_bottom;
#endif
#ifdef CONFIG_BOOTSTAGE
/**
* @bootstage: boot stage information
*/
struct bootstage_data *bootstage;
/**
* @new_bootstage: relocated boot stage information
*/
struct bootstage_data *new_bootstage;
#endif
#ifdef CONFIG_LOG
/**
* @log_drop_count: number of dropped log messages
*
* This counter is incremented for each log message which can not
* be processed because logging is not yet available as signaled by
* flag %GD_FLG_LOG_READY in @flags.
*/
int log_drop_count;
/**
* @default_log_level: default logging level
*
* For logging devices without filters @default_log_level defines the
* logging level, cf. &enum log_level_t.
*/
int default_log_level;
/**
* @log_head: list of logging devices
*/
struct list_head log_head;
/**
* @log_fmt: bit mask for logging format
*
* The @log_fmt bit mask selects the fields to be shown in log messages.
* &enum log_fmt defines the bits of the bit mask.
*/
int log_fmt;
#endif
#if CONFIG_IS_ENABLED(BLOBLIST)
/**
* @bloblist: blob list information
*/
struct bloblist_hdr *bloblist;
/**
* @new_bloblist: relocated blob list information
*/
struct bloblist_hdr *new_bloblist;
# ifdef CONFIG_SPL
/**
* @spl_handoff: SPL hand-off information
*/
struct spl_handoff *spl_handoff;
# endif
#endif
#if defined(CONFIG_TRANSLATION_OFFSET)
/**
* @translation_offset: optional translation offset
*
* See CONFIG_TRANSLATION_OFFSET.
*/
fdt_addr_t translation_offset;
#endif
#if CONFIG_IS_ENABLED(WDT)
/**
* @watchdog_dev: watchdog device
*/
struct udevice *watchdog_dev;
#endif
};
/**
* gd_board_type() - retrieve board type
*
* Return: global board type
*/
#ifdef CONFIG_BOARD_TYPES
#define gd_board_type() gd->board_type
#else
#define gd_board_type() 0
#endif
/**
* enum gd_flags - global data flags
*
* See field flags of &struct global_data.
*/
enum gd_flags {
/**
* @GD_FLG_RELOC: code was relocated to RAM
*/
GD_FLG_RELOC = 0x00001,
/**
* @GD_FLG_DEVINIT: devices have been initialized
*/
GD_FLG_DEVINIT = 0x00002,
/**
* @GD_FLG_SILENT: silent mode
*/
GD_FLG_SILENT = 0x00004,
/**
* @GD_FLG_POSTFAIL: critical POST test failed
*/
GD_FLG_POSTFAIL = 0x00008,
/**
* @GD_FLG_POSTSTOP: POST sequence aborted
*/
GD_FLG_POSTSTOP = 0x00010,
/**
* @GD_FLG_LOGINIT: log Buffer has been initialized
*/
GD_FLG_LOGINIT = 0x00020,
/**
* @GD_FLG_DISABLE_CONSOLE: disable console (in & out)
*/
GD_FLG_DISABLE_CONSOLE = 0x00040,
/**
* @GD_FLG_ENV_READY: environment imported into hash table
*/
GD_FLG_ENV_READY = 0x00080,
/**
* @GD_FLG_SERIAL_READY: pre-relocation serial console ready
*/
GD_FLG_SERIAL_READY = 0x00100,
/**
* @GD_FLG_FULL_MALLOC_INIT: full malloc() is ready
*/
GD_FLG_FULL_MALLOC_INIT = 0x00200,
/**
* @GD_FLG_SPL_INIT: spl_init() has been called
*/
GD_FLG_SPL_INIT = 0x00400,
/**
* @GD_FLG_SKIP_RELOC: don't relocate
*/
GD_FLG_SKIP_RELOC = 0x00800,
/**
* @GD_FLG_RECORD: record console
*/
GD_FLG_RECORD = 0x01000,
/**
* @GD_FLG_ENV_DEFAULT: default variable flag
*/
GD_FLG_ENV_DEFAULT = 0x02000,
/**
* @GD_FLG_SPL_EARLY_INIT: early SPL initialization is done
*/
GD_FLG_SPL_EARLY_INIT = 0x04000,
/**
* @GD_FLG_LOG_READY: log system is ready for use
*/
GD_FLG_LOG_READY = 0x08000,
/**
* @GD_FLG_WDT_READY: watchdog is ready for use
*/
GD_FLG_WDT_READY = 0x10000,
/**
* @GD_FLG_SKIP_LL_INIT: don't perform low-level initialization
*/
GD_FLG_SKIP_LL_INIT = 0x20000,
/**
* @GD_FLG_SMP_READY: SMP initialization is complete
*/
GD_FLG_SMP_READY = 0x40000,
};
#endif /* __ASSEMBLY__ */
#endif /* __ASM_GENERIC_GBL_DATA_H */