--- /dev/null
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Generate Renesas RZ/N1 BootROM header (SPKG)
+ * (C) Copyright 2022 Schneider Electric
+ *
+ * Based on spkg_utility.c
+ * (C) Copyright 2016 Renesas Electronics Europe Ltd
+ */
+
+#include "imagetool.h"
+#include <limits.h>
+#include <image.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <u-boot/crc.h>
+#include "renesas_spkgimage.h"
+
+/* Note: the ordering of the bitfields does not matter */
+struct config_file {
+ unsigned int version:1;
+ unsigned int ecc_block_size:2;
+ unsigned int ecc_enable:1;
+ unsigned int ecc_scheme:3;
+ unsigned int ecc_bytes:8;
+ unsigned int blp_len;
+ unsigned int padding;
+};
+
+static struct config_file conf;
+
+static int check_range(const char *name, int val, int min, int max)
+{
+ if (val < min) {
+ fprintf(stderr, "Warning: param '%s' adjusted to min %d\n",
+ name, min);
+ val = min;
+ }
+
+ if (val > max) {
+ fprintf(stderr, "Warning: param '%s' adjusted to max %d\n",
+ name, max);
+ val = max;
+ }
+
+ return val;
+}
+
+static int spkgimage_parse_config_line(char *line, size_t line_num)
+{
+ char *saveptr;
+ char *delim = "\t ";
+ char *name = strtok_r(line, delim, &saveptr);
+ char *val_str = strtok_r(NULL, delim, &saveptr);
+ int value = atoi(val_str);
+
+ if (!strcmp("VERSION", name)) {
+ conf.version = check_range(name, value, 1, 15);
+ } else if (!strcmp("NAND_ECC_ENABLE", name)) {
+ conf.ecc_enable = check_range(name, value, 0, 1);
+ } else if (!strcmp("NAND_ECC_BLOCK_SIZE", name)) {
+ conf.ecc_block_size = check_range(name, value, 0, 2);
+ } else if (!strcmp("NAND_ECC_SCHEME", name)) {
+ conf.ecc_scheme = check_range(name, value, 0, 7);
+ } else if (!strcmp("NAND_BYTES_PER_ECC_BLOCK", name)) {
+ conf.ecc_bytes = check_range(name, value, 0, 255);
+ } else if (!strcmp("ADD_DUMMY_BLP", name)) {
+ conf.blp_len = value ? SPKG_BLP_SIZE : 0;
+ } else if (!strcmp("PADDING", name)) {
+ if (strrchr(val_str, 'K'))
+ value = value * 1024;
+ else if (strrchr(val_str, 'M'))
+ value = value * 1024 * 1024;
+ conf.padding = check_range(name, value, 1, INT_MAX);
+ } else {
+ fprintf(stderr,
+ "config error: unknown keyword on line %ld\n",
+ line_num);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int spkgimage_parse_config_file(char *filename)
+{
+ FILE *fcfg;
+ char line[256];
+ size_t line_num = 0;
+
+ fcfg = fopen(filename, "r");
+ if (!fcfg)
+ return -EINVAL;
+
+ while (fgets(line, sizeof(line), fcfg)) {
+ line_num += 1;
+
+ /* Skip blank lines and comments */
+ if (line[0] == '\n' || line[0] == '#')
+ continue;
+
+ /* Strip any trailing newline */
+ line[strcspn(line, "\n")] = 0;
+
+ /* Parse the line */
+ if (spkgimage_parse_config_line(line, line_num))
+ return -EINVAL;
+ }
+
+ fclose(fcfg);
+
+ /* Avoid divide-by-zero later on */
+ if (!conf.padding)
+ conf.padding = 1;
+
+ return 0;
+}
+
+static int spkgimage_check_params(struct image_tool_params *params)
+{
+ if (!params->addr) {
+ fprintf(stderr, "Error: Load Address must be set.\n");
+ return -EINVAL;
+ }
+
+ if (!params->imagename || !params->imagename[0]) {
+ fprintf(stderr, "Error: Image name must be set.\n");
+ return -EINVAL;
+ }
+
+ if (!params->datafile) {
+ fprintf(stderr, "Error: Data filename must be set.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int spkgimage_verify_header(unsigned char *ptr, int size,
+ struct image_tool_params *param)
+{
+ struct spkg_file *file = (struct spkg_file *)ptr;
+ struct spkg_hdr *header = (struct spkg_hdr *)ptr;
+ char marker[4] = SPKG_HEADER_MARKER;
+ uint32_t payload_length;
+ uint32_t crc;
+ uint8_t *crc_buf;
+
+ /* Check the marker bytes */
+ if (memcmp(header->marker, marker, 4)) {
+ fprintf(stderr, "Error: invalid marker bytes\n");
+ return -EINVAL;
+ }
+
+ /* Check the CRC */
+ crc = crc32(0, ptr, SPKG_HEADER_SIZE - SPKG_CRC_SIZE);
+ if (crc != header->crc) {
+ fprintf(stderr, "Error: invalid header CRC=\n");
+ return -EINVAL;
+ }
+
+ /* Check all copies of header are the same */
+ for (int i = 1; i < SPKG_HEADER_COUNT; i++) {
+ if (memcmp(&header[0], &header[i], SPKG_HEADER_SIZE)) {
+ fprintf(stderr, "Error: header %d mismatch\n", i);
+ return -EINVAL;
+ }
+ }
+
+ /* Check the payload CRC */
+ payload_length = le32_to_cpu(header->payload_length) >> 8;
+ crc_buf = file->payload + payload_length - SPKG_CRC_SIZE;
+ crc = crc32(0, file->payload, payload_length - SPKG_CRC_SIZE);
+ if (crc_buf[0] != (crc & 0xff) ||
+ crc_buf[1] != (crc >> 8 & 0xff) ||
+ crc_buf[2] != (crc >> 16 & 0xff) ||
+ crc_buf[3] != (crc >> 24 & 0xff)) {
+ fprintf(stderr, "Error: invalid payload CRC\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void spkgimage_print_header(const void *ptr,
+ struct image_tool_params *image)
+{
+ const struct spkg_hdr *h = ptr;
+ uint32_t offset = le32_to_cpu(h->execution_offset);
+
+ printf("Image type\t: Renesas SPKG Image\n");
+ printf("Marker\t\t: %c%c%c%c\n",
+ h->marker[0], h->marker[1], h->marker[2], h->marker[3]);
+ printf("Version\t\t: %d\n", h->version);
+ printf("ECC\t\t: ");
+ if (h->ecc & 0x20)
+ printf("Scheme %d, Block size %d, Strength %d\n",
+ h->ecc_scheme, (h->ecc >> 1) & 3, h->ecc_bytes);
+ else
+ printf("Not enabled\n");
+ printf("Payload length\t: %d\n", le32_to_cpu(h->payload_length) >> 8);
+ printf("Load address\t: 0x%08x\n", le32_to_cpu(h->load_address));
+ printf("Execution offset: 0x%08x (%s mode)\n", offset & ~1,
+ offset & 1 ? "THUMB" : "ARM");
+ printf("Header checksum\t: 0x%08x\n", le32_to_cpu(h->crc));
+}
+
+/*
+ * This is the same as the macro version in include/kernel.h.
+ * However we cannot include that header, because for host tools,
+ * it ends up pulling in the host /usr/include/linux/kernel.h,
+ * which lacks the definition of roundup().
+ */
+static inline uint32_t roundup(uint32_t x, uint32_t y)
+{
+ return ((x + y - 1) / y) * y;
+}
+
+static int spkgimage_vrec_header(struct image_tool_params *params,
+ struct image_type_params *tparams)
+{
+ struct stat s;
+ struct spkg_file *out_buf;
+
+ /* Parse the config file */
+ if (spkgimage_parse_config_file(params->imagename)) {
+ fprintf(stderr, "Error parsing config file\n");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Get size of input data file */
+ if (stat(params->datafile, &s)) {
+ fprintf(stderr, "Could not stat data file: %s: %s\n",
+ params->datafile, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ params->orig_file_size = s.st_size;
+
+ /* Determine size of resulting SPKG file */
+ uint32_t header_len = SPKG_HEADER_SIZE * SPKG_HEADER_COUNT;
+ uint32_t payload_len = conf.blp_len + s.st_size + SPKG_CRC_SIZE;
+ uint32_t total_len = header_len + payload_len;
+
+ /* Round up to next multiple of padding size */
+ uint32_t padded_len = roundup(total_len, conf.padding);
+
+ /* Number of padding bytes to add */
+ conf.padding = padded_len - total_len;
+
+ /* Fixup payload_len to include padding bytes */
+ payload_len += conf.padding;
+
+ /* Prepare the header */
+ struct spkg_hdr header = {
+ .marker = SPKG_HEADER_MARKER,
+ .version = conf.version,
+ .ecc = (conf.ecc_enable << 5) | (conf.ecc_block_size << 1),
+ .ecc_scheme = conf.ecc_scheme,
+ .ecc_bytes = conf.ecc_bytes,
+ .payload_length = cpu_to_le32(payload_len << 8),
+ .load_address = cpu_to_le32(params->addr),
+ .execution_offset = cpu_to_le32(params->ep - params->addr),
+ };
+ header.crc = crc32(0, (uint8_t *)&header,
+ sizeof(header) - SPKG_CRC_SIZE);
+
+ /* The SPKG contains 8 copies of the header */
+ out_buf = malloc(sizeof(struct spkg_file));
+ if (!out_buf) {
+ fprintf(stderr, "Error: Data filename must be set.\n");
+ return -ENOMEM;
+ }
+ tparams->hdr = out_buf;
+ tparams->header_size = sizeof(struct spkg_file);
+
+ /* Fill the SPKG with the headers */
+ for (int i = 0; i < SPKG_HEADER_COUNT; i++)
+ memcpy(&out_buf->header[i], &header, sizeof(header));
+
+ /* Extra bytes to allocate in the output file */
+ return conf.blp_len + conf.padding + 4;
+}
+
+static void spkgimage_set_header(void *ptr, struct stat *sbuf, int ifd,
+ struct image_tool_params *params)
+{
+ uint8_t *payload = ptr + SPKG_HEADER_SIZE * SPKG_HEADER_COUNT;
+ uint8_t *file_end = payload + conf.blp_len + params->orig_file_size;
+ uint8_t *crc_buf = file_end + conf.padding;
+ uint32_t crc;
+
+ /* Make room for the Dummy BLp header */
+ memmove(payload + conf.blp_len, payload, params->orig_file_size);
+
+ /* Fill the SPKG with the Dummy BLp */
+ memset(payload, 0x88, conf.blp_len);
+
+ /*
+ * mkimage copy_file() pads the input file with zeros.
+ * Replace those zeros with flash friendly one bits.
+ * The original version skipped the first 4 bytes,
+ * probably an oversight, but for consistency we
+ * keep the same behaviour.
+ */
+ if (conf.padding >= 4)
+ memset(file_end + 4, 0xff, conf.padding - 4);
+
+ /* Add Payload CRC */
+ crc = crc32(0, payload, crc_buf - payload);
+ crc_buf[0] = crc;
+ crc_buf[1] = crc >> 8;
+ crc_buf[2] = crc >> 16;
+ crc_buf[3] = crc >> 24;
+}
+
+static int spkgimage_check_image_types(uint8_t type)
+{
+ return type == IH_TYPE_RENESAS_SPKG ? 0 : -EINVAL;
+}
+
+/*
+ * spkgimage type parameter definition
+ */
+U_BOOT_IMAGE_TYPE(
+ spkgimage,
+ "Renesas SPKG Image",
+ 0,
+ NULL,
+ spkgimage_check_params,
+ spkgimage_verify_header,
+ spkgimage_print_header,
+ spkgimage_set_header,
+ NULL,
+ spkgimage_check_image_types,
+ NULL,
+ spkgimage_vrec_header
+);
--- /dev/null
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Renesas RZ/N1 Package Table format
+ * (C) 2015-2016 Renesas Electronics Europe, LTD
+ * All rights reserved.
+ *
+ * Converted to mkimage plug-in
+ * (C) Copyright 2022 Schneider Electric
+ */
+
+#ifndef _SPKGIMAGE_H_
+#define _SPKGIMAGE_H_
+
+#ifdef __GNUC__
+#define __packed __attribute((packed))
+#else
+#define __packed
+#endif
+
+#define SPKG_HEADER_MARKER {'R', 'Z', 'N', '1'}
+#define SPKG_HEADER_SIZE 24
+#define SPKG_HEADER_COUNT 8
+#define SPKG_BLP_SIZE 264
+#define SPKG_CRC_SIZE 4
+
+/**
+ * struct spkg_hdr - SPKG header
+ * @marker: magic pattern "RZN1"
+ * @version: header version (currently 1)
+ * @ecc: ECC enable and block size.
+ * @ecc_scheme: ECC algorithm selction
+ * @ecc_bytes: ECC bytes per block
+ * @payload_length: length of the payload (including CRC)
+ * @load_address: address in memory where payload should be loaded
+ * @execution_offset: offset from @load_address where execution starts
+ * @crc: 32-bit CRC of the above header fields
+ *
+ * SPKG header format is defined by Renesas. It is documented in the Reneasas
+ * RZ/N1 User Manual, Chapter 7.4 ("SPKG format").
+ *
+ * The BootROM searches this header in order to find and validate the boot
+ * payload. It is therefore mandatory to wrap the payload in this header.
+ *
+ * The ECC-related fields @ecc @ecc_scheme @ecc_bytes are used only when
+ * booting from NAND flash, and they are only used while fetching the payload.
+ * These values are used to initialize the ECC controller. To avoid using
+ * non-portable bitfields, struct spkg_hdr uses uint8_t for these fields, so
+ * the user must shift the values into the correct spot.
+ *
+ * The payload will be loaded into memory at @payload_address.
+ * Execution then jumps to @payload_address + @execution_offset.
+ * The LSB of @execution_offset selects between ARM and Thumb mode,
+ * as per the usual ARM interworking convention.
+ */
+struct spkg_hdr {
+ uint8_t marker[4]; /* aka magic */
+ uint8_t version;
+ uint8_t ecc;
+ uint8_t ecc_scheme;
+ uint8_t ecc_bytes;
+ uint32_t payload_length; /* only HIGHER 24 bits */
+ uint32_t load_address;
+ uint32_t execution_offset;
+ uint32_t crc; /* of this header */
+} __packed;
+
+/**
+ * struct spkg_file - complete SPKG image
+ *
+ * A SPKG image consists of 8 identical copies of struct spkg_hdr, each one
+ * occupying 24 bytes, for a total of 192 bytes.
+ *
+ * This is followed by the payload (the u-boot binary), and a 32-bit CRC.
+ *
+ * Optionally, the payload can be being with security header ("BLp_header").
+ * This feature is not currently supported in mkimage.
+ *
+ * The payload is typically padded with 0xFF bytes so as to bring the total
+ * image size to a multiple of the flash erase size (often 64kB).
+ */
+struct spkg_file {
+ struct spkg_hdr header[SPKG_HEADER_COUNT];
+ uint8_t payload[0];
+ /* then the CRC */
+} __packed;
+
+#endif
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