blob: f568f619cb0c8f58eab91178ba68accda845ef41 [file] [log] [blame]
Tom Rini6507f132012-08-22 15:31:05 -07001/*
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 */
33DECLARE_GLOBAL_DATA_PTR;
34gd_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 */
42void __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
62void __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