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![Graeme Russ](/assets/img/avatar_default.png)
Putting global data on the stack simplifies the init process (and makes it slightly quicker). During the 'flash' stage of the init sequence, global data is in the CAR stack. After SDRAM is initialised, global data is copied from CAR to the SDRAM stack Signed-off-by: Graeme Russ <graeme.russ@gmail.com> Signed-off-by: Simon Glass <sjg@chromium.org>
163 lines
3.3 KiB
C
163 lines
3.3 KiB
C
/*
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* (C) Copyright 2011
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* Graeme Russ, <graeme.russ@gmail.com>
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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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#include <common.h>
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#include <command.h>
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#include <stdio_dev.h>
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#include <version.h>
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#include <malloc.h>
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#include <net.h>
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#include <ide.h>
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#include <serial.h>
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#include <status_led.h>
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#include <asm/processor.h>
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#include <asm/u-boot-x86.h>
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#include <asm/init_helpers.h>
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DECLARE_GLOBAL_DATA_PTR;
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/************************************************************************
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* Init Utilities *
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************************************************************************
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* Some of this code should be moved into the core functions,
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* or dropped completely,
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* but let's get it working (again) first...
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*/
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int display_banner(void)
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{
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printf("\n\n%s\n\n", version_string);
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return 0;
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}
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int display_dram_config(void)
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{
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int i;
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puts("DRAM Configuration:\n");
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for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
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printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
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print_size(gd->bd->bi_dram[i].size, "\n");
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}
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return 0;
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}
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int init_baudrate_f(void)
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{
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gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
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return 0;
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}
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int calculate_relocation_address(void)
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{
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ulong text_start = (ulong)&__text_start;
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ulong bss_end = (ulong)&__bss_end;
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ulong dest_addr;
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/*
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* NOTE: All destination address are rounded down to 16-byte
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* boundary to satisfy various worst-case alignment
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* requirements
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*/
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/* Stack is at top of available memory */
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dest_addr = gd->ram_size;
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gd->start_addr_sp = dest_addr;
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/* U-Boot is below the stack */
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dest_addr -= CONFIG_SYS_STACK_SIZE;
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dest_addr -= (bss_end - text_start);
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dest_addr &= ~15;
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gd->relocaddr = dest_addr;
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gd->reloc_off = (dest_addr - text_start);
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return 0;
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}
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int init_cache_f_r(void)
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{
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/* Initialise the CPU cache(s) */
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return init_cache();
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}
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int set_reloc_flag_r(void)
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{
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gd->flags = GD_FLG_RELOC;
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return 0;
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}
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int mem_malloc_init_r(void)
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{
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mem_malloc_init(((gd->relocaddr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
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CONFIG_SYS_MALLOC_LEN);
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return 0;
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}
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bd_t bd_data;
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int init_bd_struct_r(void)
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{
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gd->bd = &bd_data;
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memset(gd->bd, 0, sizeof(bd_t));
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return 0;
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}
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#ifndef CONFIG_SYS_NO_FLASH
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int flash_init_r(void)
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{
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ulong size;
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puts("Flash: ");
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/* configure available FLASH banks */
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size = flash_init();
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print_size(size, "\n");
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return 0;
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}
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#endif
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#ifdef CONFIG_STATUS_LED
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int status_led_set_r(void)
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{
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status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
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return 0;
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}
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#endif
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int set_load_addr_r(void)
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{
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/* Initialize from environment */
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load_addr = getenv_ulong("loadaddr", 16, load_addr);
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return 0;
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}
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