u-boot/include/asm-generic/global_data.h

/*
 * Copyright (c) 2012 The Chromium OS Authors.
 * (C) Copyright 2002-2010
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#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__
typedef struct global_data {
	bd_t *bd;
	unsigned long flags;
	unsigned int baudrate;
	unsigned long cpu_clk;	/* CPU clock in Hz!		*/
	unsigned long bus_clk;
	/* We cannot bracket this with CONFIG_PCI due to mpc5xxx */
	unsigned long pci_clk;
	unsigned long mem_clk;
#if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
	unsigned long fb_base;	/* Base address of framebuffer mem */
#endif
#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
	unsigned long post_log_word;  /* Record POST activities */
	unsigned long post_log_res; /* success of POST test */
	unsigned long post_init_f_time;  /* When post_init_f started */
#endif
#ifdef CONFIG_BOARD_TYPES
	unsigned long board_type;
#endif
	unsigned long have_console;	/* serial_init() was called */
#ifdef CONFIG_PRE_CONSOLE_BUFFER
	unsigned long precon_buf_idx;	/* Pre-Console buffer index */
#endif
#ifdef CONFIG_MODEM_SUPPORT
	unsigned long do_mdm_init;
	unsigned long be_quiet;
#endif
	unsigned long env_addr;	/* Address  of Environment struct */
	unsigned long env_valid;	/* Checksum of Environment valid? */

	/* TODO: is this the same as relocaddr, or something else? */
	unsigned long dest_addr;	/* Post-relocation address of U-Boot */
	unsigned long dest_addr_sp;
	unsigned long ram_top;	/* Top address of RAM used by U-Boot */

	unsigned long relocaddr;	/* Start address of U-Boot in RAM */
	phys_size_t ram_size;	/* RAM size */
	unsigned long mon_len;	/* monitor len */
	unsigned long irq_sp;		/* irq stack pointer */
	unsigned long start_addr_sp;	/* start_addr_stackpointer */
	unsigned long reloc_off;
	struct global_data *new_gd;	/* relocated global data */
	const void *fdt_blob;	/* Our device tree, NULL if none */
	void *new_fdt;		/* Relocated FDT */
	unsigned long fdt_size;	/* Space reserved for relocated FDT */
	void **jt;		/* jump table */
	char env_buf[32];	/* buffer for getenv() before reloc. */
	struct arch_global_data arch;	/* architecture-specific data */
} gd_t;
#endif

/*
 * Global Data Flags
 */
#define GD_FLG_RELOC		0x00001	/* Code was relocated to RAM	   */
#define GD_FLG_DEVINIT		0x00002	/* Devices have been initialized   */
#define GD_FLG_SILENT		0x00004	/* Silent mode			   */
#define GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed	   */
#define GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted	   */
#define GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized */
#define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out)	   */
#define GD_FLG_ENV_READY	0x00080	/* Env. imported into hash table   */

#endif /* __ASM_GENERIC_GBL_DATA_H */