| /** |
| * @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 */ |