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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Xilinx, Inc.
*/
#include <common.h>
#include <log.h>
#include <part.h>
#include <asm/global_data.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;
}
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