2 * Copyright 2013 Freescale Semiconductor, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 #include <spi_flash.h>
26 #define ESPI_BOOT_IMAGE_SIZE 0x48
27 #define ESPI_BOOT_IMAGE_ADDR 0x50
28 #define CONFIG_CFG_DATA_SECTOR 0
31 * The main entry for SPI booting. It's necessary that SDRAM is already
32 * configured and available since this code loads the main U-Boot image
33 * from SPI into SDRAM and starts it from there.
37 void (*uboot)(void) __noreturn;
39 unsigned char *buf = NULL;
40 struct spi_flash *flash;
42 flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
43 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
45 puts("\nspi_flash_probe failed");
50 * Load U-Boot image from SPI flash into RAM
52 buf = malloc(flash->page_size);
54 puts("\nmalloc failed");
57 memset(buf, 0, flash->page_size);
59 spi_flash_read(flash, CONFIG_CFG_DATA_SECTOR,
60 flash->page_size, (void *)buf);
61 offset = *(u32 *)(buf + ESPI_BOOT_IMAGE_ADDR);
63 offset += CONFIG_SYS_SPI_FLASH_U_BOOT_OFFS;
64 /* Get the code size from offset 0x48 */
65 code_len = *(u32 *)(buf + ESPI_BOOT_IMAGE_SIZE);
67 code_len = code_len - CONFIG_SPL_MAX_SIZE;
68 /* copy code to DDR */
69 spi_flash_read(flash, offset, code_len,
70 (void *)CONFIG_SYS_SPI_FLASH_U_BOOT_DST);
72 * Jump to U-Boot image
74 flush_cache(CONFIG_SYS_SPI_FLASH_U_BOOT_DST, code_len);
75 uboot = (void *)CONFIG_SYS_SPI_FLASH_U_BOOT_START;