mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +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>
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2011 OMICRON electronics GmbH
|
|
*
|
|
* based on drivers/mtd/nand/nand_spl_load.c
|
|
*
|
|
* Copyright (C) 2011
|
|
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <spi.h>
|
|
#include <spi_flash.h>
|
|
#include <errno.h>
|
|
#include <spl.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#ifdef CONFIG_SPL_OS_BOOT
|
|
/*
|
|
* Load the kernel, check for a valid header we can parse, and if found load
|
|
* the kernel and then device tree.
|
|
*/
|
|
static int spi_load_image_os(struct spl_image_info *spl_image,
|
|
struct spi_flash *flash,
|
|
struct image_header *header)
|
|
{
|
|
int err;
|
|
|
|
/* Read for a header, parse or error out. */
|
|
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
|
|
(void *)header);
|
|
|
|
if (image_get_magic(header) != IH_MAGIC)
|
|
return -1;
|
|
|
|
err = spl_parse_image_header(spl_image, header);
|
|
if (err)
|
|
return err;
|
|
|
|
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
|
|
spl_image->size, (void *)spl_image->load_addr);
|
|
|
|
/* Read device tree. */
|
|
spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
|
|
CONFIG_SYS_SPI_ARGS_SIZE,
|
|
(void *)CONFIG_SYS_SPL_ARGS_ADDR);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector,
|
|
ulong count, void *buf)
|
|
{
|
|
struct spi_flash *flash = load->dev;
|
|
ulong ret;
|
|
|
|
ret = spi_flash_read(flash, sector, count, buf);
|
|
if (!ret)
|
|
return count;
|
|
else
|
|
return 0;
|
|
}
|
|
/*
|
|
* The main entry for SPI booting. It's necessary that SDRAM is already
|
|
* configured and available since this code loads the main U-Boot image
|
|
* from SPI into SDRAM and starts it from there.
|
|
*/
|
|
static int spl_spi_load_image(struct spl_image_info *spl_image,
|
|
struct spl_boot_device *bootdev)
|
|
{
|
|
int err = 0;
|
|
unsigned payload_offs = CONFIG_SYS_SPI_U_BOOT_OFFS;
|
|
struct spi_flash *flash;
|
|
struct image_header *header;
|
|
|
|
/*
|
|
* Load U-Boot image from SPI flash into RAM
|
|
*/
|
|
|
|
flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
|
|
CONFIG_SF_DEFAULT_CS,
|
|
CONFIG_SF_DEFAULT_SPEED,
|
|
CONFIG_SF_DEFAULT_MODE);
|
|
if (!flash) {
|
|
puts("SPI probe failed.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
header = spl_get_load_buffer(-sizeof(*header), 0x40);
|
|
|
|
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
payload_offs = fdtdec_get_config_int(gd->fdt_blob,
|
|
"u-boot,spl-payload-offset",
|
|
payload_offs);
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPL_OS_BOOT
|
|
if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))
|
|
#endif
|
|
{
|
|
/* Load u-boot, mkimage header is 64 bytes. */
|
|
err = spi_flash_read(flash, payload_offs, 0x40,
|
|
(void *)header);
|
|
if (err) {
|
|
debug("%s: Failed to read from SPI flash (err=%d)\n",
|
|
__func__, err);
|
|
return err;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
|
|
image_get_magic(header) == FDT_MAGIC) {
|
|
err = spi_flash_read(flash, payload_offs,
|
|
roundup(fdt_totalsize(header), 4),
|
|
(void *)CONFIG_SYS_LOAD_ADDR);
|
|
if (err)
|
|
return err;
|
|
err = spl_parse_image_header(spl_image,
|
|
(struct image_header *)CONFIG_SYS_LOAD_ADDR);
|
|
} else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
|
|
image_get_magic(header) == FDT_MAGIC) {
|
|
struct spl_load_info load;
|
|
|
|
debug("Found FIT\n");
|
|
load.dev = flash;
|
|
load.priv = NULL;
|
|
load.filename = NULL;
|
|
load.bl_len = 1;
|
|
load.read = spl_spi_fit_read;
|
|
err = spl_load_simple_fit(spl_image, &load,
|
|
payload_offs,
|
|
header);
|
|
} else {
|
|
err = spl_parse_image_header(spl_image, header);
|
|
if (err)
|
|
return err;
|
|
err = spi_flash_read(flash, payload_offs,
|
|
spl_image->size,
|
|
(void *)spl_image->load_addr);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
/* Use priorty 1 so that boards can override this */
|
|
SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);
|