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 * SPDX-License-Identifier: GPL-2.0+
13 #include <spi_flash.h>
16 #ifdef CONFIG_SPL_OS_BOOT
18 * Load the kernel, check for a valid header we can parse, and if found load
19 * the kernel and then device tree.
21 static int spi_load_image_os(struct spi_flash *flash,
22 struct image_header *header)
24 /* Read for a header, parse or error out. */
25 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
28 if (image_get_magic(header) != IH_MAGIC)
31 spl_parse_image_header(header);
33 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
34 spl_image.size, (void *)spl_image.load_addr);
36 /* Read device tree. */
37 spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
38 CONFIG_SYS_SPI_ARGS_SIZE,
39 (void *)CONFIG_SYS_SPL_ARGS_ADDR);
46 * The main entry for SPI booting. It's necessary that SDRAM is already
47 * configured and available since this code loads the main U-Boot image
48 * from SPI into SDRAM and starts it from there.
50 void spl_spi_load_image(void)
52 struct spi_flash *flash;
53 struct image_header *header;
56 * Load U-Boot image from SPI flash into RAM
59 flash = spi_flash_probe(CONFIG_SPL_SPI_BUS, CONFIG_SPL_SPI_CS,
60 CONFIG_SF_DEFAULT_SPEED, SPI_MODE_3);
62 puts("SPI probe failed.\n");
66 /* use CONFIG_SYS_TEXT_BASE as temporary storage area */
67 header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
69 #ifdef CONFIG_SPL_OS_BOOT
70 if (spl_start_uboot() || spi_load_image_os(flash, header))
73 /* Load u-boot, mkimage header is 64 bytes. */
74 spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
76 spl_parse_image_header(header);
77 spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
78 spl_image.size, (void *)spl_image.load_addr);