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/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <common.h>
#include <asm/u-boot.h>
#include <asm/utils.h>
#include <asm/arch/sys_proto.h>
#include <nand.h>
#include <mmc.h>
#include <fat.h>
#include <version.h>
#include <asm/omap_common.h>
#include <asm/arch/mmc_host_def.h>
#include <i2c.h>
#include <image.h>
#include <malloc.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
u32* boot_params_ptr = NULL;
struct spl_image_info spl_image;
/* Define global data structure pointer to it*/
static gd_t gdata __attribute__ ((section(".data")));
static bd_t bdata __attribute__ ((section(".data")));
inline void hang(void)
{
puts("### ERROR ### Please RESET the board ###\n");
for (;;)
;
}
void board_init_f(ulong dummy)
{
/*
* We call relocate_code() with relocation target same as the
* CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
* skipped. Instead, only .bss initialization will happen. That's
* all we need
*/
debug(">>board_init_f()\n");
relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
}
/*
* Default function to determine if u-boot or the OS should
* be started. This implementation always returns 1.
*
* Please implement your own board specific funcion to do this.
*
* RETURN
* 0 to not start u-boot
* positive if u-boot should start
*/
#ifdef CONFIG_SPL_OS_BOOT
__weak int spl_start_uboot(void)
{
printf("SPL: Please implement spl_start_uboot() for your board\n");
printf("SPL: Direct Linux boot not active!\n");
return 1;
}
#endif
void spl_parse_image_header(const struct image_header *header)
{
u32 header_size = sizeof(struct image_header);
if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
spl_image.entry_point = __be32_to_cpu(header->ih_load);
/* Load including the header */
spl_image.load_addr = spl_image.entry_point - header_size;
spl_image.os = header->ih_os;
spl_image.name = (const char *)&header->ih_name;
debug("spl: payload image: %s load addr: 0x%x size: %d\n",
spl_image.name, spl_image.load_addr, spl_image.size);
} else {
/* Signature not found - assume u-boot.bin */
printf("mkimage signature not found - ih_magic = %x\n",
header->ih_magic);
debug("Assuming u-boot.bin ..\n");
/* Let's assume U-Boot will not be more than 200 KB */
spl_image.size = 200 * 1024;
spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
spl_image.os = IH_OS_U_BOOT;
spl_image.name = "U-Boot";
}
}
/*
* This function jumps to an image with argument. Normally an FDT or ATAGS
* image.
* arg: Pointer to paramter image in RAM
*/
#ifdef CONFIG_SPL_OS_BOOT
static void __noreturn jump_to_image_linux(void *arg)
{
debug("Entering kernel arg pointer: 0x%p\n", arg);
typedef void (*image_entry_arg_t)(int, int, void *)
__attribute__ ((noreturn));
image_entry_arg_t image_entry =
(image_entry_arg_t) spl_image.entry_point;
cleanup_before_linux();
image_entry(0, CONFIG_MACH_TYPE, arg);
}
#endif
static void __noreturn jump_to_image_no_args(void)
{
typedef void __noreturn (*image_entry_noargs_t)(u32 *);
image_entry_noargs_t image_entry =
(image_entry_noargs_t) spl_image.entry_point;
debug("image entry point: 0x%X\n", spl_image.entry_point);
/* Pass the saved boot_params from rom code */
#if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
image_entry = (image_entry_noargs_t)0x80100000;
#endif
u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
image_entry((u32 *)boot_params_ptr_addr);
}
void board_init_r(gd_t *id, ulong dummy)
{
u32 boot_device;
debug(">>spl:board_init_r()\n");
mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
CONFIG_SYS_SPL_MALLOC_SIZE);
#ifdef CONFIG_SPL_BOARD_INIT
spl_board_init();
#endif
boot_device = omap_boot_device();
debug("boot device - %d\n", boot_device);
switch (boot_device) {
#ifdef CONFIG_SPL_MMC_SUPPORT
case BOOT_DEVICE_MMC1:
case BOOT_DEVICE_MMC2:
spl_mmc_load_image();
break;
#endif
#ifdef CONFIG_SPL_NAND_SUPPORT
case BOOT_DEVICE_NAND:
spl_nand_load_image();
break;
#endif
#ifdef CONFIG_SPL_YMODEM_SUPPORT
case BOOT_DEVICE_UART:
spl_ymodem_load_image();
break;
#endif
#ifdef CONFIG_SPL_DSU_SUPPORT
case BOOT_DEVICE_USB:
spl_dsu_load_image();
break;
#endif
default:
printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
hang();
break;
}
switch (spl_image.os) {
case IH_OS_U_BOOT:
debug("Jumping to U-Boot\n");
jump_to_image_no_args();
break;
#ifdef CONFIG_SPL_OS_BOOT
case IH_OS_LINUX:
debug("Jumping to Linux\n");
spl_board_prepare_for_linux();
jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
break;
#endif
default:
puts("Unsupported OS image.. Jumping nevertheless..\n");
jump_to_image_no_args();
}
}
/* This requires UART clocks to be enabled */
void preloader_console_init(void)
{
const char *u_boot_rev = U_BOOT_VERSION;
gd = &gdata;
gd->bd = &bdata;
gd->flags |= GD_FLG_RELOC;
gd->baudrate = CONFIG_BAUDRATE;
serial_init(); /* serial communications setup */
gd->have_console = 1;
/* Avoid a second "U-Boot" coming from this string */
u_boot_rev = &u_boot_rev[7];
printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
U_BOOT_TIME);
omap_rev_string();
}
void __weak omap_rev_string()
{
printf("Texas Instruments Revision detection unimplemented\n");
}
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