1 files changed, 71 insertions, 0 deletions
diff --git a/common/spl/spl_semihosting.c b/common/spl/spl_semihosting.c
new file mode 100644
index 0000000000..df6aeb2951
--- /dev/null
+++ b/common/spl/spl_semihosting.c
@@ -0,0 +1,71 @@
+// 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 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 image_header *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 image_header));
+	if (ret) {
+		log_debug("could not read image header: %d\n", ret);
+		goto out;
+	}
+
+	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);