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/*
* (C) Copyright 2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* 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 <spi.h>
#include <asm/sections.h>
DECLARE_GLOBAL_DATA_PTR;
/* Get the top of usable RAM */
__weak ulong board_get_usable_ram_top(ulong total_size)
{
return gd->ram_size;
}
int calculate_relocation_address(void)
{
const ulong uboot_size = (uintptr_t)&__bss_end -
(uintptr_t)&__text_start;
ulong total_size;
ulong dest_addr;
ulong fdt_size = 0;
#if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
if (gd->fdt_blob)
fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
#endif
total_size = ALIGN(uboot_size, 1 << 12) + CONFIG_SYS_MALLOC_LEN +
CONFIG_SYS_STACK_SIZE + fdt_size;
dest_addr = board_get_usable_ram_top(total_size);
/*
* NOTE: All destination address are rounded down to 16-byte
* boundary to satisfy various worst-case alignment
* requirements
*/
dest_addr &= ~15;
#if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
/*
* If the device tree is sitting immediate above our image then we
* must relocate it. If it is embedded in the data section, then it
* will be relocated with other data.
*/
if (gd->fdt_blob) {
dest_addr -= fdt_size;
gd->new_fdt = (void *)dest_addr;
dest_addr &= ~15;
}
#endif
/* U-Boot is below the FDT */
dest_addr -= uboot_size;
dest_addr &= ~((1 << 12) - 1);
gd->relocaddr = dest_addr;
gd->reloc_off = dest_addr - (uintptr_t)&__text_start;
/* Stack is at the bottom, so it can grow down */
gd->start_addr_sp = dest_addr - CONFIG_SYS_MALLOC_LEN;
return 0;
}
int init_cache_f_r(void)
{
/* Initialise the CPU cache(s) */
return init_cache();
}
bd_t bd_data;
int init_bd_struct_r(void)
{
gd->bd = &bd_data;
memset(gd->bd, 0, sizeof(bd_t));
return 0;
}
int init_func_spi(void)
{
puts("SPI: ");
spi_init();
puts("ready\n");
return 0;
}
int find_fdt(void)
{
#ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
gd->fdt_blob = _binary_dt_dtb_start;
#elif defined CONFIG_OF_SEPARATE
/* FDT is at end of image */
gd->fdt_blob = (ulong *)&_end;
#endif
/* Allow the early environment to override the fdt address */
gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
(uintptr_t)gd->fdt_blob);
return 0;
}
int prepare_fdt(void)
{
/* For now, put this check after the console is ready */
if (fdtdec_prepare_fdt()) {
panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
"doc/README.fdt-control");
}
return 0;
}
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