GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/riscv/lib/image.c

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Western Digital Corporation or its affiliates.
+ * Authors:
+ *	Atish Patra <atish.patra@wdc.com>
+ * Based on arm/lib/image.c
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <errno.h>
+#include <linux/sizes.h>
+#include <linux/stddef.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* ASCII version of "RSC\0x5" defined in Linux kernel */
+#define LINUX_RISCV_IMAGE_MAGIC 0x05435352
+
+struct linux_image_h {
+	uint32_t	code0;		/* Executable code */
+	uint32_t	code1;		/* Executable code */
+	uint64_t	text_offset;	/* Image load offset */
+	uint64_t	image_size;	/* Effective Image size */
+	uint64_t	flags;		/* kernel flags (little endian) */
+	uint32_t	version;	/* version of the header */
+	uint32_t	res1;		/* reserved */
+	uint64_t	res2;		/* reserved */
+	uint64_t	res3;		/* reserved */
+	uint32_t	magic;		/* Magic number */
+	uint32_t	res4;		/* reserved */
+};
+
+int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
+		bool force_reloc)
+{
+	struct linux_image_h *lhdr;
+
+	lhdr = (struct linux_image_h *)map_sysmem(image, 0);
+
+	if (lhdr->magic != LINUX_RISCV_IMAGE_MAGIC) {
+		puts("Bad Linux RISCV Image magic!\n");
+		return -EINVAL;
+	}
+
+	if (lhdr->image_size == 0) {
+		puts("Image lacks image_size field, error!\n");
+		return -EINVAL;
+	}
+	*size = lhdr->image_size;
+	*relocated_addr = gd->ram_base + lhdr->text_offset;
+
+	unmap_sysmem(lhdr);
+
+	return 0;
+}