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// 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);
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