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-/*
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- * (C) Copyright 2008-2011
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- * Graeme Russ, <graeme.russ@gmail.com>
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- *
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- * (C) Copyright 2002
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- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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- *
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- * (C) Copyright 2002
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- * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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- *
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- * (C) Copyright 2002
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- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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- * Marius Groeger <mgroeger@sysgo.de>
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- *
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- * See file CREDITS for list of people who contributed to this
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- * project.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation; either version 2 of
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- * the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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- * MA 02111-1307 USA
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- */
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-
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-#include <common.h>
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-#include <fdtdec.h>
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-#include <watchdog.h>
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-#include <stdio_dev.h>
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-#include <asm/u-boot-x86.h>
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-#include <asm/relocate.h>
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-#include <asm/processor.h>
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-#include <asm/sections.h>
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-
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-#include <asm/init_helpers.h>
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-#include <asm/init_wrappers.h>
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-
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-/*
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- * Breath some life into the board...
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- *
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- * Getting the board up and running is a three-stage process:
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- * 1) Execute from Flash, SDRAM Uninitialised
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- * At this point, there is a limited amount of non-SDRAM memory
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- * (typically the CPU cache, but can also be SRAM or even a buffer of
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- * of some peripheral). This limited memory is used to hold:
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- * - The initial copy of the Global Data Structure
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- * - A temporary stack
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- * - A temporary x86 Global Descriptor Table
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- * - The pre-console buffer (if enabled)
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- *
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- * The following is performed during this phase of execution:
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- * - Core low-level CPU initialisation
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- * - Console initialisation
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- * - SDRAM initialisation
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- *
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- * 2) Execute from Flash, SDRAM Initialised
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- * At this point we copy Global Data from the initial non-SDRAM
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- * memory and set up the permanent stack in SDRAM. The CPU cache is no
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- * longer being used as temporary memory, so we can now fully enable
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- * it.
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- *
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- * The following is performed during this phase of execution:
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- * - Create final stack in SDRAM
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- * - Copy Global Data from temporary memory to SDRAM
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- * - Enabling of CPU cache(s),
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- * - Copying of U-Boot code and data from Flash to RAM
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- * - Clearing of the BSS
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- * - ELF relocation adjustments
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- *
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- * 3) Execute from SDRAM
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- * The following is performed during this phase of execution:
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- * - All remaining initialisation
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- */
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-
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-/*
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- * The requirements for any new initalization function is simple: it is
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- * a function with no parameters which returns an integer return code,
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- * where 0 means "continue" and != 0 means "fatal error, hang the system"
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- */
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-typedef int (init_fnc_t) (void);
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-
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-/*
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- * init_sequence_f is the list of init functions which are run when U-Boot
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- * is executing from Flash with a limited 'C' environment. The following
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- * limitations must be considered when implementing an '_f' function:
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- * - 'static' variables are read-only
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- * - Global Data (gd->xxx) is read/write
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- * - Stack space is limited
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- *
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- * The '_f' sequence must, as a minimum, initialise SDRAM. It _should_
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- * also initialise the console (to provide early debug output)
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- */
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-init_fnc_t *init_sequence_f[] = {
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- cpu_init_f,
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- board_early_init_f,
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-#ifdef CONFIG_OF_CONTROL
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- find_fdt,
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- fdtdec_check_fdt,
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-#endif
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- env_init,
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- init_baudrate_f,
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- serial_init,
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- console_init_f,
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-#ifdef CONFIG_OF_CONTROL
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- prepare_fdt,
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-#endif
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- dram_init_f,
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- calculate_relocation_address,
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-
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- NULL,
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-};
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-
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-/*
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- * init_sequence_f_r is the list of init functions which are run when
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- * U-Boot is executing from Flash with a semi-limited 'C' environment.
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- * The following limitations must be considered when implementing an
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- * '_f_r' function:
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- * - 'static' variables are read-only
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- * - Global Data (gd->xxx) is read/write
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- *
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- * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
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- * supported). It _should_, if possible, copy global data to RAM and
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- * initialise the CPU caches (to speed up the relocation process)
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- */
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-init_fnc_t *init_sequence_f_r[] = {
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- init_cache_f_r,
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- copy_uboot_to_ram,
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- copy_fdt_to_ram,
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- clear_bss,
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- do_elf_reloc_fixups,
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-
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- NULL,
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-};
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-
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-/*
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- * init_sequence_r is the list of init functions which are run when U-Boot
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- * is executing from RAM with a full 'C' environment. There are no longer
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- * any limitations which must be considered when implementing an '_r'
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- * function, (i.e.'static' variables are read/write)
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- *
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- * If not already done, the '_r' sequence must copy global data to RAM and
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- * (should) initialise the CPU caches.
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- */
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-init_fnc_t *init_sequence_r[] = {
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- set_reloc_flag_r,
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- init_bd_struct_r,
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- mem_malloc_init_r,
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- cpu_init_r,
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- board_early_init_r,
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- dram_init,
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- interrupt_init,
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- timer_init,
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- display_banner,
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- display_dram_config,
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- serial_initialize_r,
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-#ifndef CONFIG_SYS_NO_FLASH
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- flash_init_r,
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-#endif
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-#ifdef CONFIG_PCI
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- pci_init_r,
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-#endif
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-#ifdef CONFIG_SPI
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- init_func_spi,
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-#endif
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- env_relocate_r,
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- stdio_init,
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- jumptable_init_r,
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- console_init_r,
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-#ifdef CONFIG_MISC_INIT_R
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- misc_init_r,
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-#endif
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-#if defined(CONFIG_CMD_KGDB)
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- kgdb_init_r,
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-#endif
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- enable_interrupts_r,
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-#ifdef CONFIG_STATUS_LED
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- status_led_set_r,
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-#endif
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- set_load_addr_r,
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-#if defined(CONFIG_CMD_IDE)
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- ide_init_r,
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-#endif
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-#if defined(CONFIG_CMD_SCSI)
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- scsi_init_r,
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-#endif
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-#if defined(CONFIG_CMD_DOC)
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- doc_init_r,
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-#endif
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-#ifdef CONFIG_BITBANGMII
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- bb_miiphy_init_r,
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-#endif
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-#if defined(CONFIG_CMD_NET)
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- eth_initialize_r,
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-#ifdef CONFIG_RESET_PHY_R
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- reset_phy_r,
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-#endif
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-#endif
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-#ifdef CONFIG_LAST_STAGE_INIT
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- last_stage_init,
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-#endif
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- NULL,
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-};
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-
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-static void do_init_loop(init_fnc_t **init_fnc_ptr)
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-{
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- for (; *init_fnc_ptr; ++init_fnc_ptr) {
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- WATCHDOG_RESET();
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- if ((*init_fnc_ptr)() != 0)
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- hang();
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- }
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-}
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-
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-void board_init_f(ulong boot_flags)
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-{
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- gd->fdt_blob = gd->new_fdt = NULL;
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- gd->flags = boot_flags;
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-
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- do_init_loop(init_sequence_f);
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-
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- /*
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- * SDRAM and console are now initialised. The final stack can now
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- * be setup in SDRAM. Code execution will continue in Flash, but
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- * with the stack in SDRAM and Global Data in temporary memory
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- * (CPU cache)
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- */
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- board_init_f_r_trampoline(gd->start_addr_sp);
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-
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- /* NOTREACHED - board_init_f_r_trampoline() does not return */
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- while (1)
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- ;
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-}
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-
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-void board_init_f_r(void)
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-{
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- do_init_loop(init_sequence_f_r);
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-
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- /*
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- * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
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- * Transfer execution from Flash to RAM by calculating the address
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- * of the in-RAM copy of board_init_r() and calling it
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- */
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- (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
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-
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- /* NOTREACHED - board_init_r() does not return */
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- while (1)
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- ;
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-}
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-
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-void board_init_r(gd_t *id, ulong dest_addr)
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-{
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- do_init_loop(init_sequence_r);
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-
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- /* main_loop() can return to retry autoboot, if so just run it again. */
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- for (;;)
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- main_loop();
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-
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- /* NOTREACHED - no way out of command loop except booting */
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-}
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