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/*
* Copyright (C) 2012 Samsung Electronics
*
* 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<config.h>
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
#include <asm/arch/dmc.h>
#include <asm/arch/power.h>
#include <asm/arch/spl.h>
#include "common_setup.h"
#include "clock_init.h"
DECLARE_GLOBAL_DATA_PTR;
#define OM_STAT (0x1f << 1)
/* Index into irom ptr table */
enum index {
MMC_INDEX,
EMMC44_INDEX,
EMMC44_END_INDEX,
SPI_INDEX,
USB_INDEX,
};
/* IROM Function Pointers Table */
u32 irom_ptr_table[] = {
[MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
[EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
[EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
-EMMC4.4 end boot operation */
[SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
[USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
};
void *get_irom_func(int index)
{
return (void *)*(u32 *)irom_ptr_table[index];
}
#ifdef CONFIG_USB_BOOTING
/*
* Set/clear program flow prediction and return the previous state.
*/
static int config_branch_prediction(int set_cr_z)
{
unsigned int cr;
/* System Control Register: 11th bit Z Branch prediction enable */
cr = get_cr();
set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
return cr & CR_Z;
}
#endif
/*
* Copy U-boot from mmc to RAM:
* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
* Pointer to API (Data transfer from mmc to ram)
*/
void copy_uboot_to_ram(void)
{
enum boot_mode bootmode = BOOT_MODE_OM;
u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
u32 offset = 0, size = 0;
#ifdef CONFIG_SUPPORT_EMMC_BOOT
u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
void (*end_bootop_from_emmc)(void);
#endif
#ifdef CONFIG_USB_BOOTING
u32 (*usb_copy)(void);
int is_cr_z_set;
unsigned int sec_boot_check;
/* Read iRAM location to check for secondary USB boot mode */
sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
bootmode = BOOT_MODE_USB;
#endif
if (bootmode == BOOT_MODE_OM)
bootmode = readl(samsung_get_base_power()) & OM_STAT;
switch (bootmode) {
#ifdef CONFIG_SPI_BOOTING
case BOOT_MODE_SERIAL:
offset = SPI_FLASH_UBOOT_POS;
size = CONFIG_BL2_SIZE;
copy_bl2 = get_irom_func(SPI_INDEX);
break;
#endif
case BOOT_MODE_MMC:
offset = BL2_START_OFFSET;
size = BL2_SIZE_BLOC_COUNT;
copy_bl2 = get_irom_func(MMC_INDEX);
break;
#ifdef CONFIG_SUPPORT_EMMC_BOOT
case BOOT_MODE_EMMC:
/* Set the FSYS1 clock divisor value for EMMC boot */
emmc_boot_clk_div_set();
copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
end_bootop_from_emmc();
break;
#endif
#ifdef CONFIG_USB_BOOTING
case BOOT_MODE_USB:
/*
* iROM needs program flow prediction to be disabled
* before copy from USB device to RAM
*/
is_cr_z_set = config_branch_prediction(0);
usb_copy = get_irom_func(USB_INDEX);
usb_copy();
config_branch_prediction(is_cr_z_set);
break;
#endif
default:
break;
}
if (copy_bl2)
copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
}
void memzero(void *s, size_t n)
{
char *ptr = s;
size_t i;
for (i = 0; i < n; i++)
*ptr++ = '\0';
}
/**
* Set up the U-Boot global_data pointer
*
* This sets the address of the global data, and sets up basic values.
*
* @param gdp Value to give to gd
*/
static void setup_global_data(gd_t *gdp)
{
gd = gdp;
memzero((void *)gd, sizeof(gd_t));
gd->flags |= GD_FLG_RELOC;
gd->baudrate = CONFIG_BAUDRATE;
gd->have_console = 1;
}
void board_init_f(unsigned long bootflag)
{
__aligned(8) gd_t local_gd;
__attribute__((noreturn)) void (*uboot)(void);
setup_global_data(&local_gd);
if (do_lowlevel_init())
power_exit_wakeup();
copy_uboot_to_ram();
/* Jump to U-Boot image */
uboot = (void *)CONFIG_SYS_TEXT_BASE;
(*uboot)();
/* Never returns Here */
}
/* Place Holders */
void board_init_r(gd_t *id, ulong dest_addr)
{
/* Function attribute is no-return */
/* This Function never executes */
while (1)
;
}
void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}
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