arch/arm/cpu/arm926ejs/davinci/spl.c

   1 /*
   2  * Copyright (C) 2011
   3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23 #include <common.h>
  24 #include <config.h>
  25 #include <spl.h>
  26 #include <asm/u-boot.h>
  27 #include <asm/utils.h>
  28 #include <nand.h>
  29 #include <asm/arch/dm365_lowlevel.h>
  30 #include <ns16550.h>
  31 #include <malloc.h>
  32 #include <spi_flash.h>
  33 #include <mmc.h>
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 #ifndef CONFIG_SPL_LIBCOMMON_SUPPORT
  38 void puts(const char *str)
  39 {
  40         while (*str)
  41                 putc(*str++);
  42 }
  43
  44 void putc(char c)
  45 {
  46         if (c == '\n')
  47                 NS16550_putc((NS16550_t)(CONFIG_SYS_NS16550_COM1), '\r');
  48
  49         NS16550_putc((NS16550_t)(CONFIG_SYS_NS16550_COM1), c);
  50 }
  51 #endif /* CONFIG_SPL_LIBCOMMON_SUPPORT */
  52
  53 void board_init_f(ulong dummy)
  54 {
  55         /* First, setup our stack pointer. */
  56         asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK));
  57
  58         /* Second, perform our low-level init. */
  59 #ifdef CONFIG_SOC_DM365
  60         dm36x_lowlevel_init(0);
  61 #endif
  62 #ifdef CONFIG_SOC_DA8XX
  63         arch_cpu_init();
  64 #endif
  65
  66         /* Third, we clear the BSS. */
  67         memset(__bss_start, 0, __bss_end - __bss_start);
  68
  69         /* Finally, setup gd and move to the next step. */
  70         gd = &gdata;
  71         board_init_r(NULL, 0);
  72 }
  73
  74 void spl_board_init(void)
  75 {
  76         preloader_console_init();
  77 }
  78
  79 u32 spl_boot_mode(void)
  80 {
  81         return MMCSD_MODE_RAW;
  82 }
  83
  84 u32 spl_boot_device(void)
  85 {
  86 #ifdef CONFIG_SPL_NAND_SIMPLE
  87         return BOOT_DEVICE_NAND;
  88 #elif defined(CONFIG_SPL_SPI_LOAD)
  89         return BOOT_DEVICE_SPI;
  90 #elif defined(CONFIG_SPL_MMC_LOAD)
  91         return BOOT_DEVICE_MMC1;
  92 #else
  93         puts("Unknown boot device\n");
  94         hang();
  95 #endif
  96 }