mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
04ce5427bd
The SPL loaders assume that the CONFIG_SYS_TEXT_BASE memory location is available and can be corrupted by loading ie. uImage or fitImage headers there. Sometimes it could be beneficial to load the headers elsewhere, ie. if CONFIG_SYS_TEXT_BASE is not yet writable while we still want to parse the image headers in some local onchip memory to ie. extract firmware from that image. Add the possibility to override the location where the headers get loaded by introducing new function, spl_get_load_buffer() which takes two arguments -- offset from the CONFIG_SYS_TEXT_BASE and size of the data that are to be loaded there -- and returns a valid buffer address or hangs the system. The default behavior is the same as before, add the offset to CONFIG_SYS_TEXT_BASE and return that address. User can override the weak spl_get_load_buffer() function though. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2016
|
|
* Xilinx, Inc.
|
|
*
|
|
* (C) Copyright 2016
|
|
* Toradex AG
|
|
*
|
|
* Michal Simek <michal.simek@xilinx.com>
|
|
* Stefan Agner <stefan.agner@toradex.com>
|
|
*/
|
|
#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 CONFIG_IS_ENABLED(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, image_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.
|
|
*/
|
|
header = spl_get_load_buffer(-sizeof(*header),
|
|
sizeof(*header));
|
|
|
|
}
|
|
header = (struct image_header *)map_sysmem(u_boot_pos, 0);
|
|
|
|
spl_parse_image_header(spl_image, header);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#if CONFIG_IS_ENABLED(RAM_DEVICE)
|
|
SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
|
|
#endif
|
|
#if CONFIG_IS_ENABLED(DFU_SUPPORT)
|
|
SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
|
|
#endif
|
|
|
|
|