2 * Copyright (C) 2011 OMICRON electronics GmbH
4 * based on drivers/mtd/nand/nand_spl_load.c
7 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <spi_flash.h>
29 * The main entry for SPI booting. It's necessary that SDRAM is already
30 * configured and available since this code loads the main U-Boot image
31 * from SPI into SDRAM and starts it from there.
35 struct spi_flash *flash;
36 void (*uboot)(void) __noreturn;
39 * Load U-Boot image from SPI flash into RAM
42 flash = spi_flash_probe(CONFIG_SPL_SPI_BUS, CONFIG_SPL_SPI_CS,
43 CONFIG_SF_DEFAULT_SPEED, SPI_MODE_3);
49 spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
50 CONFIG_SYS_SPI_U_BOOT_SIZE,
51 (void *) CONFIG_SYS_TEXT_BASE);
54 * Jump to U-Boot image
56 uboot = (void *) CONFIG_SYS_TEXT_BASE;