1 /* 2 * (C) Copyright 2010-2012 3 * Texas Instruments, <www.ti.com> 4 * 5 * Aneesh V <aneesh@ti.com> 6 * Tom Rini <trini@ti.com> 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 #include <common.h> 27 #include <config.h> 28 #include <spl.h> 29 #include <image.h> 30 #include <linux/compiler.h> 31 32 /* Pointer to as well as the global data structure for SPL */ 33 DECLARE_GLOBAL_DATA_PTR; 34 gd_t gdata __attribute__ ((section(".data"))); 35 36 /* 37 * In the context of SPL, board_init_f must ensure that any clocks/etc for 38 * DDR are enabled, ensure that the stack pointer is valid, clear the BSS 39 * and call board_init_f. We provide this version by default but mark it 40 * as __weak to allow for platforms to do this in their own way if needed. 41 */ 42 void __weak board_init_f(ulong dummy) 43 { 44 /* Set the stack pointer. */ 45 asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK)); 46 47 /* Clear the BSS. */ 48 memset(__bss_start, 0, __bss_end - __bss_start); 49 50 /* Set global data pointer. */ 51 gd = &gdata; 52 53 board_init_r(NULL, 0); 54 } 55 56 /* 57 * This function jumps to an image with argument. Normally an FDT or ATAGS 58 * image. 59 * arg: Pointer to paramter image in RAM 60 */ 61 #ifdef CONFIG_SPL_OS_BOOT 62 void __noreturn jump_to_image_linux(void *arg) 63 { 64 debug("Entering kernel arg pointer: 0x%p\n", arg); 65 typedef void (*image_entry_arg_t)(int, int, void *) 66 __attribute__ ((noreturn)); 67 image_entry_arg_t image_entry = 68 (image_entry_arg_t) spl_image.entry_point; 69 cleanup_before_linux(); 70 image_entry(0, CONFIG_MACH_TYPE, arg); 71 } 72 #endif 73