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-rw-r--r--arch/x86/lib/board.c266
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diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c
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--- a/arch/x86/lib/board.c
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-/*
- * (C) Copyright 2008-2011
- * Graeme Russ, <graeme.russ@gmail.com>
- *
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * (C) Copyright 2002
- * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
- *
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.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
- */
-
-#include <common.h>
-#include <fdtdec.h>
-#include <watchdog.h>
-#include <stdio_dev.h>
-#include <asm/u-boot-x86.h>
-#include <asm/relocate.h>
-#include <asm/processor.h>
-#include <asm/sections.h>
-
-#include <asm/init_helpers.h>
-#include <asm/init_wrappers.h>
-
-/*
- * Breath some life into the board...
- *
- * Getting the board up and running is a three-stage process:
- * 1) Execute from Flash, SDRAM Uninitialised
- * At this point, there is a limited amount of non-SDRAM memory
- * (typically the CPU cache, but can also be SRAM or even a buffer of
- * of some peripheral). This limited memory is used to hold:
- * - The initial copy of the Global Data Structure
- * - A temporary stack
- * - A temporary x86 Global Descriptor Table
- * - The pre-console buffer (if enabled)
- *
- * The following is performed during this phase of execution:
- * - Core low-level CPU initialisation
- * - Console initialisation
- * - SDRAM initialisation
- *
- * 2) Execute from Flash, SDRAM Initialised
- * At this point we copy Global Data from the initial non-SDRAM
- * memory and set up the permanent stack in SDRAM. The CPU cache is no
- * longer being used as temporary memory, so we can now fully enable
- * it.
- *
- * The following is performed during this phase of execution:
- * - Create final stack in SDRAM
- * - Copy Global Data from temporary memory to SDRAM
- * - Enabling of CPU cache(s),
- * - Copying of U-Boot code and data from Flash to RAM
- * - Clearing of the BSS
- * - ELF relocation adjustments
- *
- * 3) Execute from SDRAM
- * The following is performed during this phase of execution:
- * - All remaining initialisation
- */
-
-/*
- * The requirements for any new initalization function is simple: it is
- * a function with no parameters which returns an integer return code,
- * where 0 means "continue" and != 0 means "fatal error, hang the system"
- */
-typedef int (init_fnc_t) (void);
-
-/*
- * init_sequence_f is the list of init functions which are run when U-Boot
- * is executing from Flash with a limited 'C' environment. The following
- * limitations must be considered when implementing an '_f' function:
- * - 'static' variables are read-only
- * - Global Data (gd->xxx) is read/write
- * - Stack space is limited
- *
- * The '_f' sequence must, as a minimum, initialise SDRAM. It _should_
- * also initialise the console (to provide early debug output)
- */
-init_fnc_t *init_sequence_f[] = {
- cpu_init_f,
- board_early_init_f,
-#ifdef CONFIG_OF_CONTROL
- find_fdt,
- fdtdec_check_fdt,
-#endif
- env_init,
- init_baudrate_f,
- serial_init,
- console_init_f,
-#ifdef CONFIG_OF_CONTROL
- prepare_fdt,
-#endif
- dram_init_f,
- calculate_relocation_address,
-
- NULL,
-};
-
-/*
- * init_sequence_f_r is the list of init functions which are run when
- * U-Boot is executing from Flash with a semi-limited 'C' environment.
- * The following limitations must be considered when implementing an
- * '_f_r' function:
- * - 'static' variables are read-only
- * - Global Data (gd->xxx) is read/write
- *
- * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
- * supported). It _should_, if possible, copy global data to RAM and
- * initialise the CPU caches (to speed up the relocation process)
- */
-init_fnc_t *init_sequence_f_r[] = {
- init_cache_f_r,
- copy_uboot_to_ram,
- copy_fdt_to_ram,
- clear_bss,
- do_elf_reloc_fixups,
-
- NULL,
-};
-
-/*
- * init_sequence_r is the list of init functions which are run when U-Boot
- * is executing from RAM with a full 'C' environment. There are no longer
- * any limitations which must be considered when implementing an '_r'
- * function, (i.e.'static' variables are read/write)
- *
- * If not already done, the '_r' sequence must copy global data to RAM and
- * (should) initialise the CPU caches.
- */
-init_fnc_t *init_sequence_r[] = {
- set_reloc_flag_r,
- init_bd_struct_r,
- mem_malloc_init_r,
- cpu_init_r,
- board_early_init_r,
- dram_init,
- interrupt_init,
- timer_init,
- display_banner,
- display_dram_config,
- serial_initialize_r,
-#ifndef CONFIG_SYS_NO_FLASH
- flash_init_r,
-#endif
-#ifdef CONFIG_PCI
- pci_init_r,
-#endif
-#ifdef CONFIG_SPI
- init_func_spi,
-#endif
- env_relocate_r,
- stdio_init,
- jumptable_init_r,
- console_init_r,
-#ifdef CONFIG_MISC_INIT_R
- misc_init_r,
-#endif
-#if defined(CONFIG_CMD_KGDB)
- kgdb_init_r,
-#endif
- enable_interrupts_r,
-#ifdef CONFIG_STATUS_LED
- status_led_set_r,
-#endif
- set_load_addr_r,
-#if defined(CONFIG_CMD_IDE)
- ide_init_r,
-#endif
-#if defined(CONFIG_CMD_SCSI)
- scsi_init_r,
-#endif
-#if defined(CONFIG_CMD_DOC)
- doc_init_r,
-#endif
-#ifdef CONFIG_BITBANGMII
- bb_miiphy_init_r,
-#endif
-#if defined(CONFIG_CMD_NET)
- eth_initialize_r,
-#ifdef CONFIG_RESET_PHY_R
- reset_phy_r,
-#endif
-#endif
-#ifdef CONFIG_LAST_STAGE_INIT
- last_stage_init,
-#endif
- NULL,
-};
-
-static void do_init_loop(init_fnc_t **init_fnc_ptr)
-{
- for (; *init_fnc_ptr; ++init_fnc_ptr) {
- WATCHDOG_RESET();
- if ((*init_fnc_ptr)() != 0)
- hang();
- }
-}
-
-void board_init_f(ulong boot_flags)
-{
- gd->fdt_blob = gd->new_fdt = NULL;
- gd->flags = boot_flags;
-
- do_init_loop(init_sequence_f);
-
- /*
- * SDRAM and console are now initialised. The final stack can now
- * be setup in SDRAM. Code execution will continue in Flash, but
- * with the stack in SDRAM and Global Data in temporary memory
- * (CPU cache)
- */
- board_init_f_r_trampoline(gd->start_addr_sp);
-
- /* NOTREACHED - board_init_f_r_trampoline() does not return */
- while (1)
- ;
-}
-
-void board_init_f_r(void)
-{
- do_init_loop(init_sequence_f_r);
-
- /*
- * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
- * Transfer execution from Flash to RAM by calculating the address
- * of the in-RAM copy of board_init_r() and calling it
- */
- (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
-
- /* NOTREACHED - board_init_r() does not return */
- while (1)
- ;
-}
-
-void board_init_r(gd_t *id, ulong dest_addr)
-{
- do_init_loop(init_sequence_r);
-
- /* main_loop() can return to retry autoboot, if so just run it again. */
- for (;;)
- main_loop();
-
- /* NOTREACHED - no way out of command loop except booting */
-}