mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 20:43:32 +00:00
688d62bfc8
Allow loading a FIT image via semihosting in SPL. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2022 Sean Anderson <sean.anderson@seco.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <image.h>
|
|
#include <log.h>
|
|
#include <semihosting.h>
|
|
#include <spl.h>
|
|
|
|
static int smh_read_full(long fd, void *memp, size_t len)
|
|
{
|
|
long read;
|
|
|
|
read = smh_read(fd, memp, len);
|
|
if (read < 0)
|
|
return read;
|
|
if (read != len)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
static ulong smh_fit_read(struct spl_load_info *load, ulong file_offset,
|
|
ulong size, void *buf)
|
|
{
|
|
long fd;
|
|
ulong ret;
|
|
|
|
fd = smh_open(load->filename, MODE_READ | MODE_BINARY);
|
|
if (fd < 0) {
|
|
log_debug("could not open %s: %ld\n", load->filename, fd);
|
|
return 0;
|
|
}
|
|
ret = smh_read(fd, buf, size);
|
|
smh_close(fd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int spl_smh_load_image(struct spl_image_info *spl_image,
|
|
struct spl_boot_device *bootdev)
|
|
{
|
|
const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;
|
|
int ret;
|
|
long fd, len;
|
|
struct legacy_img_hdr *header =
|
|
spl_get_load_buffer(-sizeof(*header), sizeof(*header));
|
|
|
|
fd = smh_open(filename, MODE_READ | MODE_BINARY);
|
|
if (fd < 0) {
|
|
log_debug("could not open %s: %ld\n", filename, fd);
|
|
return fd;
|
|
}
|
|
|
|
ret = smh_flen(fd);
|
|
if (ret < 0) {
|
|
log_debug("could not get length of image: %d\n", ret);
|
|
goto out;
|
|
}
|
|
len = ret;
|
|
|
|
ret = smh_read_full(fd, header, sizeof(struct legacy_img_hdr));
|
|
if (ret) {
|
|
log_debug("could not read image header: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
|
|
image_get_magic(header) == FDT_MAGIC) {
|
|
struct spl_load_info load;
|
|
|
|
debug("Found FIT\n");
|
|
load.read = smh_fit_read;
|
|
load.bl_len = 1;
|
|
load.filename = filename;
|
|
load.priv = NULL;
|
|
smh_close(fd);
|
|
|
|
return spl_load_simple_fit(spl_image, &load, 0, header);
|
|
}
|
|
|
|
ret = spl_parse_image_header(spl_image, bootdev, header);
|
|
if (ret) {
|
|
log_debug("failed to parse image header: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = smh_seek(fd, 0);
|
|
if (ret) {
|
|
log_debug("could not seek to start of image: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = smh_read_full(fd, (void *)spl_image->load_addr, len);
|
|
if (ret)
|
|
log_debug("could not read %s: %d\n", filename, ret);
|
|
out:
|
|
smh_close(fd);
|
|
return ret;
|
|
}
|
|
SPL_LOAD_IMAGE_METHOD("SEMIHOSTING", 0, BOOT_DEVICE_SMH, spl_smh_load_image);
|