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