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/*
*
* Common functions for OMAP4 based boards
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Author :
* Aneesh V <aneesh@ti.com>
* Steve Sakoman <steve@sakoman.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 <asm/arch/cpu.h>
#include <asm/arch/sys_proto.h>
#include <asm/sizes.h>
/*
* Routine: s_init
* Description: Does early system init of muxing and clocks.
* - Called path is with SRAM stack.
*/
void s_init(void)
{
watchdog_init();
}
/*
* Routine: wait_for_command_complete
* Description: Wait for posting to finish on watchdog
*/
void wait_for_command_complete(struct watchdog *wd_base)
{
int pending = 1;
do {
pending = readl(&wd_base->wwps);
} while (pending);
}
/*
* Routine: watchdog_init
* Description: Shut down watch dogs
*/
void watchdog_init(void)
{
struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
writel(WD_UNLOCK1, &wd2_base->wspr);
wait_for_command_complete(wd2_base);
writel(WD_UNLOCK2, &wd2_base->wspr);
}
/*
* This function finds the SDRAM size available in the system
* based on DMM section configurations
* This is needed because the size of memory installed may be
* different on different versions of the board
*/
u32 sdram_size(void)
{
u32 section, i, total_size = 0, size, addr;
for (i = 0; i < 4; i++) {
section = __raw_readl(DMM_LISA_MAP_BASE + i*4);
addr = section & DMM_LISA_MAP_SYS_ADDR_MASK;
/* See if the address is valid */
if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
(addr < OMAP44XX_DRAM_ADDR_SPACE_END)) {
size = ((section & DMM_LISA_MAP_SYS_SIZE_MASK) >>
DMM_LISA_MAP_SYS_SIZE_SHIFT);
size = 1 << size;
size *= SZ_16M;
total_size += size;
}
}
return total_size;
}
/*
* Routine: dram_init
* Description: sets uboots idea of sdram size
*/
int dram_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
gd->bd->bi_dram[0].start = 0x80000000;
gd->bd->bi_dram[0].size = sdram_size();
#else
gd->ram_size = sdram_size();
#endif
return 0;
}
/*
* Print board information
*/
int checkboard(void)
{
puts(sysinfo.board_string);
return 0;
}
/*
* This function is called by start_armboot. You can reliably use static
* data. Any boot-time function that require static data should be
* called from here
*/
int arch_cpu_init(void)
{
set_muxconf_regs();
return 0;
}
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