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/**
* @file
* @brief Wrapper to call board level initialization routine
*
* FileName: arch/arm/boards/omap/platform.S
*
* board_init_lowlevel is defined here. This calls board_init which
* is linked to the binary - the board_init only has a SRAM stack.
* so it needs to be careful about the usage of global variables
* and the likes. Enabled only if CONFIG_MACH_DO_LOWLEVEL_INIT is
* defined
*/
/*
* (C) Copyright 2006-2008
* Texas Instruments, <www.ti.com>
* Nishanth Menon <x0nishan@ti.com>
*
* 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 <config.h>
#include <mach/silicon.h>
#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
/**
* @fn void board_init_lowlevel(void)
*
* @brief This provides a assembly wrapper setting up SRAM before calling
* board_init
*
* @return void
*/
.globl board_init_lowlevel
board_init_lowlevel:
/* Setup a temporary stack so that we can call C functions
* Yes. this might have been already done by arch code.
* No harm in being a bit redundant to avoid future complications
*/
ldr sp, SRAM_STACK
str ip, [sp] /* stash old link register */
str lr, [sp] /* stash current link register */
mov ip, lr /* save link reg across call */
/* Do the pin muxes, sdram init etc..board-xxx.c */
bl board_init
ldr lr, [sp] /* restore current link register */
ldr ip, [sp] /* restore save ip */
/* back to arch calling code */
mov pc, lr
SRAM_STACK:
.word OMAP_SRAM_STACK
#endif /* CONFIG_MACH_DO_LOWLEVEL_INIT */
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