[people/ms/u-boot.git] / tools / rkcommon.c

/*
 * (C) Copyright 2015 Google,  Inc
 * Written by Simon Glass <sjg@chromium.org>
 *
 * (C) 2017 Theobroma Systems Design und Consulting GmbH
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * Helper functions for Rockchip images
 */

#include "imagetool.h"
#include <image.h>
#include <rc4.h>
#include "mkimage.h"
#include "rkcommon.h"

#define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))

enum {
	RK_SIGNATURE		= 0x0ff0aa55,
};

/**
 * struct header0_info - header block for boot ROM
 *
 * This is stored at SD card block 64 (where each block is 512 bytes, or at
 * the start of SPI flash. It is encoded with RC4.
 *
 * @signature:		Signature (must be RKSD_SIGNATURE)
 * @disable_rc4:	0 to use rc4 for boot image,  1 to use plain binary
 * @init_offset:	Offset in blocks of the SPL code from this header
 *			block. E.g. 4 means 2KB after the start of this header.
 * Other fields are not used by U-Boot
 */
struct header0_info {
	uint32_t signature;
	uint8_t reserved[4];
	uint32_t disable_rc4;
	uint16_t init_offset;
	uint8_t reserved1[492];
	uint16_t init_size;
	uint16_t init_boot_size;
	uint8_t reserved2[2];
};

/**
 * struct header1_info
 */
struct header1_info {
	uint32_t magic;
};

/**
 * struct spl_info - spl info for each chip
 *
 * @imagename:		Image name(passed by "mkimage -n")
 * @spl_hdr:		Boot ROM requires a 4-bytes spl header
 * @spl_size:		Spl size(include extra 4-bytes spl header)
 * @spl_rc4:		RC4 encode the SPL binary (same key as header)
 * @spl_boot0:          A new-style (ARM_SOC_BOOT0_HOOK) image that should
 *                      have the boot magic (e.g. 'RK33') written to its first
 *                      word.
 */

struct spl_info {
	const char *imagename;
	const char *spl_hdr;
	const uint32_t spl_size;
	const bool spl_rc4;
	const bool spl_boot0;
};

static struct spl_info spl_infos[] = {
	{ "rk3036", "RK30", 0x1000, false, false },
	{ "rk3188", "RK31", 0x8000 - 0x800, true, false },
	{ "rk322x", "RK32", 0x8000 - 0x1000, false, false },
	{ "rk3288", "RK32", 0x8000, false, false },
	{ "rk3328", "RK32", 0x8000 - 0x1000, false, false },
	{ "rk3399", "RK33", 0x30000 - 0x2000, false, true },
	{ "rv1108", "RK11", 0x1800, false, false},
};

static unsigned char rc4_key[16] = {
	124, 78, 3, 4, 85, 5, 9, 7,
	45, 44, 123, 56, 23, 13, 23, 17
};

static struct spl_info *rkcommon_get_spl_info(char *imagename)
{
	int i;

	if (!imagename)
		return NULL;

	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
		if (!strncmp(imagename, spl_infos[i].imagename, 6))
			return spl_infos + i;

	return NULL;
}

int rkcommon_check_params(struct image_tool_params *params)
{
	int i;

	if (rkcommon_get_spl_info(params->imagename) != NULL)
		return EXIT_SUCCESS;

	/*
	 * If this is a operation (list or extract), the don't require
	 * imagename to be set.
	 */
	if (params->lflag || params->iflag)
		return EXIT_SUCCESS;

	fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
		params->imagename ? params->imagename : "NULL");

	fprintf(stderr, "Available imagename:");
	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
		fprintf(stderr, "\t%s", spl_infos[i].imagename);
	fprintf(stderr, "\n");

	return EXIT_FAILURE;
}

const char *rkcommon_get_spl_hdr(struct image_tool_params *params)
{
	struct spl_info *info = rkcommon_get_spl_info(params->imagename);

	/*
	 * info would not be NULL, because of we checked params before.
	 */
	return info->spl_hdr;
}


int rkcommon_get_spl_size(struct image_tool_params *params)
{
	struct spl_info *info = rkcommon_get_spl_info(params->imagename);

	/*
	 * info would not be NULL, because of we checked params before.
	 */
	return info->spl_size;
}

bool rkcommon_need_rc4_spl(struct image_tool_params *params)
{
	struct spl_info *info = rkcommon_get_spl_info(params->imagename);

	/*
	 * info would not be NULL, because of we checked params before.
	 */
	return info->spl_rc4;
}

bool rkcommon_spl_is_boot0(struct image_tool_params *params)
{
	struct spl_info *info = rkcommon_get_spl_info(params->imagename);

	/*
	 * info would not be NULL, because of we checked params before.
	 */
	return info->spl_boot0;
}

static void rkcommon_set_header0(void *buf, uint file_size,
				 struct image_tool_params *params)
{
	struct header0_info *hdr = buf;

	memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
	hdr->signature = RK_SIGNATURE;
	hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
	hdr->init_offset = RK_INIT_OFFSET;

	hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE);
	/*
	 * The init_size has to be a multiple of 4 blocks (i.e. of 2K)
	 * or the BootROM will not boot the image.
	 *
	 * Note: To verify that this is not a legacy constraint, we
	 *       rechecked this against the RK3399 BootROM.
	 */
	hdr->init_size = ROUND(hdr->init_size, 4);
	/*
	 * init_boot_size needs to be set, as it is read by the BootROM
	 * to determine the size of the next-stage bootloader (e.g. U-Boot
	 * proper), when used with the back-to-bootrom functionality.
	 *
	 * see https://lists.denx.de/pipermail/u-boot/2017-May/293267.html
	 * for a more detailed explanation by Andy Yan
	 */
	hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;

	rc4_encode(buf, RK_BLK_SIZE, rc4_key);
}

int rkcommon_set_header(void *buf, uint file_size,
			struct image_tool_params *params)
{
	struct header1_info *hdr = buf + RK_SPL_HDR_START;

	if (file_size > rkcommon_get_spl_size(params))
		return -ENOSPC;

	rkcommon_set_header0(buf, file_size, params);

	/* Set up the SPL name (i.e. copy spl_hdr over) */
	memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE);

	if (rkcommon_need_rc4_spl(params))
		rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START,
					params->file_size - RK_SPL_HDR_START);

	return 0;
}

static inline unsigned rkcommon_offset_to_spi(unsigned offset)
{
	/*
	 * While SD/MMC images use a flat addressing, SPI images are padded
	 * to use the first 2K of every 4K sector only.
	 */
	return ((offset & ~0x7ff) << 1) + (offset & 0x7ff);
}

static int rkcommon_parse_header(const void *buf, struct header0_info *header0,
				 struct spl_info **spl_info)
{
	unsigned hdr1_offset;
	struct header1_info *hdr1_sdmmc, *hdr1_spi;
	int i;

	if (spl_info)
		*spl_info = NULL;

	/*
	 * The first header (hdr0) is always RC4 encoded, so try to decrypt
	 * with the well-known key.
	 */
	memcpy((void *)header0, buf, sizeof(struct header0_info));
	rc4_encode((void *)header0, sizeof(struct header0_info), rc4_key);

	if (header0->signature != RK_SIGNATURE)
		return -EPROTO;

	/* We don't support RC4 encoded image payloads here, yet... */
	if (header0->disable_rc4 == 0)
		return -ENOSYS;

	hdr1_offset = header0->init_offset * RK_BLK_SIZE;
	hdr1_sdmmc = (struct header1_info *)(buf + hdr1_offset);
	hdr1_spi = (struct header1_info *)(buf +
					   rkcommon_offset_to_spi(hdr1_offset));

	for (i = 0; i < ARRAY_SIZE(spl_infos); i++) {
		if (!memcmp(&hdr1_sdmmc->magic, spl_infos[i].spl_hdr, 4)) {
			if (spl_info)
				*spl_info = &spl_infos[i];
			return IH_TYPE_RKSD;
		} else if (!memcmp(&hdr1_spi->magic, spl_infos[i].spl_hdr, 4)) {
			if (spl_info)
				*spl_info = &spl_infos[i];
			return IH_TYPE_RKSPI;
		}
	}

	return -1;
}

int rkcommon_verify_header(unsigned char *buf, int size,
			   struct image_tool_params *params)
{
	struct header0_info header0;
	struct spl_info *img_spl_info, *spl_info;
	int ret;

	ret = rkcommon_parse_header(buf, &header0, &img_spl_info);

	/* If this is the (unimplemented) RC4 case, then rewrite the result */
	if (ret == -ENOSYS)
		return 0;

	if (ret < 0)
		return ret;

	/*
	 * If no 'imagename' is specified via the commandline (e.g. if this is
	 * 'dumpimage -l' w/o any further constraints), we accept any spl_info.
	 */
	if (params->imagename == NULL)
		return 0;

	/* Match the 'imagename' against the 'spl_hdr' found */
	spl_info = rkcommon_get_spl_info(params->imagename);
	if (spl_info && img_spl_info)
		return strcmp(spl_info->spl_hdr, img_spl_info->spl_hdr);

	return -ENOENT;
}

void rkcommon_print_header(const void *buf)
{
	struct header0_info header0;
	struct spl_info *spl_info;
	uint8_t image_type;
	int ret;

	ret = rkcommon_parse_header(buf, &header0, &spl_info);

	/* If this is the (unimplemented) RC4 case, then fail silently */
	if (ret == -ENOSYS)
		return;

	if (ret < 0) {
		fprintf(stderr, "Error: image verification failed\n");
		return;
	}

	image_type = ret;

	printf("Image Type:   Rockchip %s (%s) boot image\n",
	       spl_info->spl_hdr,
	       (image_type == IH_TYPE_RKSD) ? "SD/MMC" : "SPI");
	printf("Data Size:    %d bytes\n", header0.init_size * RK_BLK_SIZE);
}

void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
{
	unsigned int remaining = size;

	while (remaining > 0) {
		int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;

		rc4_encode(buf + offset, step, rc4_key);
		offset += RK_BLK_SIZE;
		remaining -= step;
	}
}

int rkcommon_vrec_header(struct image_tool_params *params,
			 struct image_type_params *tparams,
			 unsigned int alignment)
{
	unsigned int  unpadded_size;
	unsigned int  padded_size;

	/*
	 * The SPL image looks as follows:
	 *
	 * 0x0    header0 (see rkcommon.c)
	 * 0x800  spl_name ('RK30', ..., 'RK33')
	 *        (start of the payload for AArch64 payloads: we expect the
	 *        first 4 bytes to be available for overwriting with our
	 *        spl_name)
	 * 0x804  first instruction to be executed
	 *        (start of the image/payload for 32bit payloads)
	 *
	 * For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is
	 * required for its sections (so the image we receive needs to
	 * have the first 4 bytes reserved for the spl_name).  Reserving
	 * these 4 bytes is done using the BOOT0_HOOK infrastructure.
	 *
	 * Depending on this, the header is either 0x800 (if this is a
	 * 'boot0'-style payload, which has reserved 4 bytes at the
	 * beginning for the 'spl_name' and expects us to overwrite
	 * its first 4 bytes) or 0x804 bytes in length.
	 */
	if (rkcommon_spl_is_boot0(params))
		tparams->header_size = RK_SPL_HDR_START;
	else
		tparams->header_size = RK_SPL_HDR_START + 4;

	/* Allocate, clear and install the header */
	tparams->hdr = malloc(tparams->header_size);
	if (!tparams->hdr)
		return -ENOMEM;
	memset(tparams->hdr, 0, tparams->header_size);

	/*
	 * If someone passed in 0 for the alignment, we'd better handle
	 * it correctly...
	 */
	if (!alignment)
		alignment = 1;

	unpadded_size = tparams->header_size + params->file_size;
	padded_size = ROUND(unpadded_size, alignment);

	return padded_size - unpadded_size;
}
Commit	Line	Data
a131c1f4 SG	1	/*
	2	* (C) Copyright 2015 Google, Inc
	3	* Written by Simon Glass <sjg@chromium.org>
	4	*
2fb371ff PT	5	* (C) 2017 Theobroma Systems Design und Consulting GmbH
2fb371ff PT	6	*
a131c1f4 SG	7	* SPDX-License-Identifier: GPL-2.0+
	8	*
	9	* Helper functions for Rockchip images
	10	*/
	11
	12	#include "imagetool.h"
	13	#include <image.h>
	14	#include <rc4.h>
	15	#include "mkimage.h"
	16	#include "rkcommon.h"
	17
a1a2dfb8 PT	18	#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
a1a2dfb8 PT	19
a131c1f4 SG	20	enum {
	21	RK_SIGNATURE = 0x0ff0aa55,
	22	};
	23
	24	/**
	25	* struct header0_info - header block for boot ROM
	26	*
	27	* This is stored at SD card block 64 (where each block is 512 bytes, or at
	28	* the start of SPI flash. It is encoded with RC4.
	29	*
	30	* @signature: Signature (must be RKSD_SIGNATURE)
	31	* @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
3641339e	32	* @init_offset: Offset in blocks of the SPL code from this header
a131c1f4 SG	33	* block. E.g. 4 means 2KB after the start of this header.
	34	* Other fields are not used by U-Boot
	35	*/
	36	struct header0_info {
	37	uint32_t signature;
	38	uint8_t reserved[4];
	39	uint32_t disable_rc4;
3641339e JC	40	uint16_t init_offset;
	41	uint8_t reserved1[492];
	42	uint16_t init_size;
	43	uint16_t init_boot_size;
a131c1f4 SG	44	uint8_t reserved2[2];
	45	};
	46
111bcc4f PT	47	/**
	48	* struct header1_info
	49	*/
	50	struct header1_info {
	51	uint32_t magic;
111bcc4f PT	52	};
111bcc4f PT	53
7bf274b9 JC	54	/**
	55	* struct spl_info - spl info for each chip
	56	*
	57	* @imagename: Image name(passed by "mkimage -n")
	58	* @spl_hdr: Boot ROM requires a 4-bytes spl header
	59	* @spl_size: Spl size(include extra 4-bytes spl header)
cfbcdade	60	* @spl_rc4: RC4 encode the SPL binary (same key as header)
30827756 PT	61	* @spl_boot0: A new-style (ARM_SOC_BOOT0_HOOK) image that should
	62	* have the boot magic (e.g. 'RK33') written to its first
	63	* word.
7bf274b9	64	*/
111bcc4f	65
7bf274b9 JC	66	struct spl_info {
	67	const char *imagename;
	68	const char *spl_hdr;
	69	const uint32_t spl_size;
cfbcdade	70	const bool spl_rc4;
30827756	71	const bool spl_boot0;
7bf274b9 JC	72	};
	73
	74	static struct spl_info spl_infos[] = {
111bcc4f PT	75	{ "rk3036", "RK30", 0x1000, false, false },
111bcc4f PT	76	{ "rk3188", "RK31", 0x8000 - 0x800, true, false },
236776d6	77	{ "rk322x", "RK32", 0x8000 - 0x1000, false, false },
111bcc4f	78	{ "rk3288", "RK32", 0x8000, false, false },
68d12600	79	{ "rk3328", "RK32", 0x8000 - 0x1000, false, false },
915e0981	80	{ "rk3399", "RK33", 0x30000 - 0x2000, false, true },
79fa1573	81	{ "rv1108", "RK11", 0x1800, false, false},
7bf274b9 JC	82	};
7bf274b9 JC	83
a131c1f4 SG	84	static unsigned char rc4_key[16] = {
	85	124, 78, 3, 4, 85, 5, 9, 7,
	86	45, 44, 123, 56, 23, 13, 23, 17
	87	};
	88
7bf274b9 JC	89	static struct spl_info rkcommon_get_spl_info(char imagename)
	90	{
	91	int i;
	92
24aae93f PT	93	if (!imagename)
	94	return NULL;
	95
7bf274b9 JC	96	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
	97	if (!strncmp(imagename, spl_infos[i].imagename, 6))
	98	return spl_infos + i;
	99
	100	return NULL;
	101	}
	102
	103	int rkcommon_check_params(struct image_tool_params *params)
	104	{
	105	int i;
	106
	107	if (rkcommon_get_spl_info(params->imagename) != NULL)
24aae93f PT	108	return EXIT_SUCCESS;
	109
	110	/*
	111	* If this is a operation (list or extract), the don't require
	112	* imagename to be set.
	113	*/
	114	if (params->lflag \|\| params->iflag)
	115	return EXIT_SUCCESS;
7bf274b9 JC	116
7bf274b9 JC	117	fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
24aae93f	118	params->imagename ? params->imagename : "NULL");
7bf274b9 JC	119
	120	fprintf(stderr, "Available imagename:");
	121	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
	122	fprintf(stderr, "\t%s", spl_infos[i].imagename);
	123	fprintf(stderr, "\n");
	124
24aae93f	125	return EXIT_FAILURE;
7bf274b9 JC	126	}
	127
	128	const char rkcommon_get_spl_hdr(struct image_tool_params params)
	129	{
	130	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	131
	132	/*
	133	* info would not be NULL, because of we checked params before.
	134	*/
	135	return info->spl_hdr;
	136	}
	137
30827756 PT	138
30827756 PT	139	int rkcommon_get_spl_size(struct image_tool_params *params)
111bcc4f PT	140	{
	141	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	142
	143	/*
	144	* info would not be NULL, because of we checked params before.
	145	*/
30827756	146	return info->spl_size;
111bcc4f PT	147	}
111bcc4f PT	148
30827756	149	bool rkcommon_need_rc4_spl(struct image_tool_params *params)
7bf274b9 JC	150	{
	151	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	152
	153	/*
	154	* info would not be NULL, because of we checked params before.
	155	*/
30827756	156	return info->spl_rc4;
7bf274b9 JC	157	}
7bf274b9 JC	158
30827756	159	bool rkcommon_spl_is_boot0(struct image_tool_params *params)
cfbcdade HS	160	{
	161	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	162
	163	/*
	164	* info would not be NULL, because of we checked params before.
	165	*/
30827756	166	return info->spl_boot0;
cfbcdade HS	167	}
cfbcdade HS	168
111bcc4f PT	169	static void rkcommon_set_header0(void *buf, uint file_size,
111bcc4f PT	170	struct image_tool_params *params)
a131c1f4	171	{
111bcc4f	172	struct header0_info *hdr = buf;
a131c1f4	173
111bcc4f	174	memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
a131c1f4	175	hdr->signature = RK_SIGNATURE;
cfbcdade	176	hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
3641339e	177	hdr->init_offset = RK_INIT_OFFSET;
a131c1f4	178
a1a2dfb8 PT	179	hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE);
	180	/*
	181	* The init_size has to be a multiple of 4 blocks (i.e. of 2K)
	182	* or the BootROM will not boot the image.
	183	*
	184	* Note: To verify that this is not a legacy constraint, we
	185	* rechecked this against the RK3399 BootROM.
	186	*/
	187	hdr->init_size = ROUND(hdr->init_size, 4);
	188	/*
a1c29d4b PT	189	* init_boot_size needs to be set, as it is read by the BootROM
	190	* to determine the size of the next-stage bootloader (e.g. U-Boot
	191	* proper), when used with the back-to-bootrom functionality.
	192	*
	193	* see https://lists.denx.de/pipermail/u-boot/2017-May/293267.html
	194	* for a more detailed explanation by Andy Yan
a1a2dfb8	195	*/
a1c29d4b	196	hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
a131c1f4 SG	197
a131c1f4 SG	198	rc4_encode(buf, RK_BLK_SIZE, rc4_key);
111bcc4f PT	199	}
	200
	201	int rkcommon_set_header(void *buf, uint file_size,
	202	struct image_tool_params *params)
	203	{
	204	struct header1_info *hdr = buf + RK_SPL_HDR_START;
	205
	206	if (file_size > rkcommon_get_spl_size(params))
	207	return -ENOSPC;
	208
	209	rkcommon_set_header0(buf, file_size, params);
	210
2fb371ff	211	/* Set up the SPL name (i.e. copy spl_hdr over) */
111bcc4f PT	212	memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE);
111bcc4f PT	213
111bcc4f PT	214	if (rkcommon_need_rc4_spl(params))
	215	rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START,
	216	params->file_size - RK_SPL_HDR_START);
a131c1f4 SG	217
	218	return 0;
	219	}
cfbcdade	220
2fb371ff PT	221	static inline unsigned rkcommon_offset_to_spi(unsigned offset)
	222	{
	223	/*
	224	* While SD/MMC images use a flat addressing, SPI images are padded
	225	* to use the first 2K of every 4K sector only.
	226	*/
	227	return ((offset & ~0x7ff) << 1) + (offset & 0x7ff);
	228	}
	229
2fb371ff PT	230	static int rkcommon_parse_header(const void buf, struct header0_info header0,
	231	struct spl_info **spl_info)
	232	{
	233	unsigned hdr1_offset;
	234	struct header1_info hdr1_sdmmc, hdr1_spi;
	235	int i;
	236
	237	if (spl_info)
	238	*spl_info = NULL;
	239
	240	/*
	241	* The first header (hdr0) is always RC4 encoded, so try to decrypt
	242	* with the well-known key.
	243	*/
	244	memcpy((void *)header0, buf, sizeof(struct header0_info));
	245	rc4_encode((void *)header0, sizeof(struct header0_info), rc4_key);
	246
	247	if (header0->signature != RK_SIGNATURE)
	248	return -EPROTO;
	249
	250	/* We don't support RC4 encoded image payloads here, yet... */
	251	if (header0->disable_rc4 == 0)
	252	return -ENOSYS;
	253
	254	hdr1_offset = header0->init_offset * RK_BLK_SIZE;
	255	hdr1_sdmmc = (struct header1_info *)(buf + hdr1_offset);
	256	hdr1_spi = (struct header1_info *)(buf +
	257	rkcommon_offset_to_spi(hdr1_offset));
	258
	259	for (i = 0; i < ARRAY_SIZE(spl_infos); i++) {
	260	if (!memcmp(&hdr1_sdmmc->magic, spl_infos[i].spl_hdr, 4)) {
	261	if (spl_info)
	262	*spl_info = &spl_infos[i];
	263	return IH_TYPE_RKSD;
	264	} else if (!memcmp(&hdr1_spi->magic, spl_infos[i].spl_hdr, 4)) {
	265	if (spl_info)
	266	*spl_info = &spl_infos[i];
	267	return IH_TYPE_RKSPI;
	268	}
	269	}
	270
	271	return -1;
	272	}
	273
	274	int rkcommon_verify_header(unsigned char *buf, int size,
	275	struct image_tool_params *params)
	276	{
	277	struct header0_info header0;
	278	struct spl_info img_spl_info, spl_info;
	279	int ret;
	280
	281	ret = rkcommon_parse_header(buf, &header0, &img_spl_info);
	282
	283	/* If this is the (unimplemented) RC4 case, then rewrite the result */
	284	if (ret == -ENOSYS)
	285	return 0;
	286
	287	if (ret < 0)
	288	return ret;
	289
	290	/*
	291	* If no 'imagename' is specified via the commandline (e.g. if this is
	292	* 'dumpimage -l' w/o any further constraints), we accept any spl_info.
	293	*/
294	if (params->imagename == NULL)
295	return 0;
296
297	/* Match the 'imagename' against the 'spl_hdr' found */
298	spl_info = rkcommon_get_spl_info(params->imagename);
299	if (spl_info && img_spl_info)
300	return strcmp(spl_info->spl_hdr, img_spl_info->spl_hdr);
301
302	return -ENOENT;
303	}
304
305	void rkcommon_print_header(const void *buf)
306	{
307	struct header0_info header0;
308	struct spl_info *spl_info;
309	uint8_t image_type;
310	int ret;
311
312	ret = rkcommon_parse_header(buf, &header0, &spl_info);
313
314	/* If this is the (unimplemented) RC4 case, then fail silently */
315	if (ret == -ENOSYS)
316	return;
317
318	if (ret < 0) {
319	fprintf(stderr, "Error: image verification failed\n");
320	return;
321	}
322
323	image_type = ret;
324
325	printf("Image Type: Rockchip %s (%s) boot image\n",
326	spl_info->spl_hdr,
327	(image_type == IH_TYPE_RKSD) ? "SD/MMC" : "SPI");
328	printf("Data Size: %d bytes\n", header0.init_size * RK_BLK_SIZE);
329	}
330
cfbcdade HS	331	void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
	332	{
	333	unsigned int remaining = size;
	334
	335	while (remaining > 0) {
	336	int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;
	337
	338	rc4_encode(buf + offset, step, rc4_key);
	339	offset += RK_BLK_SIZE;
	340	remaining -= step;
	341	}
	342	}
111bcc4f	343
366aad4d PT	344	int rkcommon_vrec_header(struct image_tool_params *params,
	345	struct image_type_params *tparams,
	346	unsigned int alignment)
111bcc4f	347	{
366aad4d PT	348	unsigned int unpadded_size;
	349	unsigned int padded_size;
	350
111bcc4f PT	351	/*
	352	* The SPL image looks as follows:
	353	*
	354	* 0x0 header0 (see rkcommon.c)
	355	* 0x800 spl_name ('RK30', ..., 'RK33')
ea3729e2 PT	356	* (start of the payload for AArch64 payloads: we expect the
	357	* first 4 bytes to be available for overwriting with our
	358	* spl_name)
111bcc4f	359	* 0x804 first instruction to be executed
ea3729e2	360	* (start of the image/payload for 32bit payloads)
111bcc4f	361	*
ea3729e2 PT	362	* For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is
	363	* required for its sections (so the image we receive needs to
	364	* have the first 4 bytes reserved for the spl_name). Reserving
	365	* these 4 bytes is done using the BOOT0_HOOK infrastructure.
111bcc4f	366	*
ea3729e2 PT	367	* Depending on this, the header is either 0x800 (if this is a
	368	* 'boot0'-style payload, which has reserved 4 bytes at the
	369	* beginning for the 'spl_name' and expects us to overwrite
	370	* its first 4 bytes) or 0x804 bytes in length.
111bcc4f	371	*/
30827756 PT	372	if (rkcommon_spl_is_boot0(params))
30827756 PT	373	tparams->header_size = RK_SPL_HDR_START;
111bcc4f PT	374	else
	375	tparams->header_size = RK_SPL_HDR_START + 4;
	376
	377	/* Allocate, clear and install the header */
	378	tparams->hdr = malloc(tparams->header_size);
22929bec SG	379	if (!tparams->hdr)
22929bec SG	380	return -ENOMEM;
111bcc4f	381	memset(tparams->hdr, 0, tparams->header_size);
366aad4d PT	382
	383	/*
	384	* If someone passed in 0 for the alignment, we'd better handle
	385	* it correctly...
	386	*/
	387	if (!alignment)
	388	alignment = 1;
	389
	390	unpadded_size = tparams->header_size + params->file_size;
	391	padded_size = ROUND(unpadded_size, alignment);
	392
	393	return padded_size - unpadded_size;
111bcc4f	394	}