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

source/bootloader/u-boot-2020.01/board/xilinx/zynq/bootimg.c

@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Xilinx, Inc.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <u-boot/md5.h>
+#include <zynq_bootimg.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define ZYNQ_IMAGE_PHDR_OFFSET		0x09C
+#define ZYNQ_IMAGE_FSBL_LEN_OFFSET	0x040
+#define ZYNQ_PART_HDR_CHKSUM_WORD_COUNT	0x0F
+#define ZYNQ_PART_HDR_WORD_COUNT	0x10
+#define ZYNQ_MAXIMUM_IMAGE_WORD_LEN	0x40000000
+#define MD5_CHECKSUM_SIZE	16
+
+struct headerarray {
+	u32 fields[16];
+};
+
+/*
+ * Check whether the given partition is last partition or not
+ */
+static int zynq_islastpartition(struct headerarray *head)
+{
+	int index;
+
+	debug("%s\n", __func__);
+	if (head->fields[ZYNQ_PART_HDR_CHKSUM_WORD_COUNT] != 0xFFFFFFFF)
+		return -1;
+
+	for (index = 0; index < ZYNQ_PART_HDR_WORD_COUNT - 1; index++) {
+		if (head->fields[index] != 0x0)
+			return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Get the partition count from the partition header
+ */
+int zynq_get_part_count(struct partition_hdr *part_hdr_info)
+{
+	u32 count;
+	struct headerarray *hap;
+
+	debug("%s\n", __func__);
+
+	for (count = 0; count < ZYNQ_MAX_PARTITION_NUMBER; count++) {
+		hap = (struct headerarray *)&part_hdr_info[count];
+		if (zynq_islastpartition(hap) != -1)
+			break;
+	}
+
+	return count;
+}
+
+/*
+ * Get the partition info of all the partitions available.
+ */
+int zynq_get_partition_info(u32 image_base_addr, u32 *fsbl_len,
+			    struct partition_hdr *part_hdr)
+{
+	u32 parthdroffset;
+
+	*fsbl_len = *((u32 *)(image_base_addr + ZYNQ_IMAGE_FSBL_LEN_OFFSET));
+
+	parthdroffset = *((u32 *)(image_base_addr + ZYNQ_IMAGE_PHDR_OFFSET));
+
+	parthdroffset += image_base_addr;
+
+	memcpy(part_hdr, (u32 *)parthdroffset,
+	       (sizeof(struct partition_hdr) * ZYNQ_MAX_PARTITION_NUMBER));
+
+	return 0;
+}
+
+/*
+ * Check whether the partition header is valid or not
+ */
+int zynq_validate_hdr(struct partition_hdr *header)
+{
+	struct headerarray *hap;
+	u32 index;
+	u32 checksum;
+
+	debug("%s\n", __func__);
+
+	hap = (struct headerarray *)header;
+
+	for (index = 0; index < ZYNQ_PART_HDR_WORD_COUNT; index++) {
+		if (hap->fields[index])
+			break;
+	}
+	if (index == ZYNQ_PART_HDR_WORD_COUNT)
+		return -1;
+
+	checksum = 0;
+	for (index = 0; index < ZYNQ_PART_HDR_CHKSUM_WORD_COUNT; index++)
+		checksum += hap->fields[index];
+
+	checksum ^= 0xFFFFFFFF;
+
+	if (hap->fields[ZYNQ_PART_HDR_CHKSUM_WORD_COUNT] != checksum) {
+		printf("Error: Checksum 0x%8.8x != 0x%8.8x\n",
+		       checksum, hap->fields[ZYNQ_PART_HDR_CHKSUM_WORD_COUNT]);
+		return -1;
+	}
+
+	if (header->imagewordlen > ZYNQ_MAXIMUM_IMAGE_WORD_LEN) {
+		printf("INVALID_PARTITION_LENGTH\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Validate the partition by calculationg the md5 checksum for the
+ * partition and compare with checksum present in checksum offset of
+ * partition
+ */
+int zynq_validate_partition(u32 start_addr, u32 len, u32 chksum_off)
+{
+	u8 checksum[MD5_CHECKSUM_SIZE];
+	u8 calchecksum[MD5_CHECKSUM_SIZE];
+
+	memcpy(&checksum[0], (u32 *)chksum_off, MD5_CHECKSUM_SIZE);
+
+	md5_wd((u8 *)start_addr, len, &calchecksum[0], 0x10000);
+
+	if (!memcmp(checksum, calchecksum, MD5_CHECKSUM_SIZE))
+		return 0;
+
+	printf("Error: Partition DataChecksum\n");
+	return -1;
+}