spl_ram.c
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/*
* (C) Copyright 2016
* Xilinx, Inc.
*
* (C) Copyright 2016
* Toradex AG
*
* Michal Simek <michal.simek@xilinx.com>
* Stefan Agner <stefan.agner@toradex.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <binman_sym.h>
#include <mapmem.h>
#include <spl.h>
#include <linux/libfdt.h>
#ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
# define CONFIG_SPL_LOAD_FIT_ADDRESS 0
#endif
static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
ulong count, void *buf)
{
debug("%s: sector %lx, count %lx, buf %lx\n",
__func__, sector, count, (ulong)buf);
memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
return count;
}
static int spl_ram_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
struct image_header *header;
header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
#if defined(CONFIG_SPL_DFU_SUPPORT)
if (bootdev->boot_device == BOOT_DEVICE_DFU)
spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
#endif
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic(header) == FDT_MAGIC) {
struct spl_load_info load;
debug("Found FIT\n");
load.bl_len = 1;
load.read = spl_ram_load_read;
spl_load_simple_fit(spl_image, &load, 0, header);
} else {
ulong u_boot_pos = binman_sym(ulong, u_boot_any, pos);
debug("Legacy image\n");
/*
* Get the header. It will point to an address defined by
* handoff which will tell where the image located inside
* the flash.
*/
debug("u_boot_pos = %lx\n", u_boot_pos);
if (u_boot_pos == BINMAN_SYM_MISSING) {
/*
* No binman support or no information. For now, fix it
* to the address pointed to by U-Boot.
*/
u_boot_pos = CONFIG_SYS_TEXT_BASE -
sizeof(struct image_header);
}
header = (struct image_header *)map_sysmem(u_boot_pos, 0);
spl_parse_image_header(spl_image, header);
}
return 0;
}
#if defined(CONFIG_SPL_RAM_DEVICE)
SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
#endif
#if defined(CONFIG_SPL_DFU_SUPPORT)
SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
#endif