mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
32f98735f9
This changes the layout in decreasing addresses from: 1. Stack 2. Sections in the image 3. Heap to 1. Sections in the image 2. Heap 3. Stack This allows the stack to grow significantly more since it isn't constrained by the other u-boot areas. More importantly, the generic memory wipe code assumes that the stack is the lowest addressed area used by the main part of u-boot. In the original layout, that means that u-boot tramples all over itself. In the new layout, it works. Signed-off-by: Gabe Black <gabeblack@google.com> Signed-off-by: Simon Glass <sjg@chromium.org>
173 lines
3.4 KiB
C
173 lines
3.4 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 <spi.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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/* U-Boot is at the top */
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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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/* Stack is at the bottom, so it can grow down */
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gd->start_addr_sp = dest_addr - CONFIG_SYS_MALLOC_LEN;
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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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int init_func_spi(void)
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{
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puts("SPI: ");
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spi_init();
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puts("ready\n");
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return 0;
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}
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