[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 },
	{ "rk3128", "RK31", 0x1800, 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 },
	{ "rk3368", "RK33", 0x8000 - 0x1000, false, true },
	{ "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	75	{ "rk3036", "RK30", 0x1000, false, false },
5d62aba4	76	{ "rk3128", "RK31", 0x1800, false, false },
111bcc4f	77	{ "rk3188", "RK31", 0x8000 - 0x800, true, false },
236776d6	78	{ "rk322x", "RK32", 0x8000 - 0x1000, false, false },
111bcc4f	79	{ "rk3288", "RK32", 0x8000, false, false },
68d12600	80	{ "rk3328", "RK32", 0x8000 - 0x1000, false, false },
0da5c2e7	81	{ "rk3368", "RK33", 0x8000 - 0x1000, false, true },
915e0981	82	{ "rk3399", "RK33", 0x30000 - 0x2000, false, true },
79fa1573	83	{ "rv1108", "RK11", 0x1800, false, false},
7bf274b9 JC	84	};
7bf274b9 JC	85
a131c1f4 SG	86	static unsigned char rc4_key[16] = {
	87	124, 78, 3, 4, 85, 5, 9, 7,
	88	45, 44, 123, 56, 23, 13, 23, 17
	89	};
	90
7bf274b9 JC	91	static struct spl_info rkcommon_get_spl_info(char imagename)
	92	{
	93	int i;
	94
24aae93f PT	95	if (!imagename)
	96	return NULL;
	97
7bf274b9 JC	98	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
	99	if (!strncmp(imagename, spl_infos[i].imagename, 6))
	100	return spl_infos + i;
	101
	102	return NULL;
	103	}
	104
	105	int rkcommon_check_params(struct image_tool_params *params)
	106	{
	107	int i;
	108
	109	if (rkcommon_get_spl_info(params->imagename) != NULL)
24aae93f PT	110	return EXIT_SUCCESS;
	111
	112	/*
	113	* If this is a operation (list or extract), the don't require
	114	* imagename to be set.
	115	*/
	116	if (params->lflag \|\| params->iflag)
	117	return EXIT_SUCCESS;
7bf274b9 JC	118
7bf274b9 JC	119	fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
24aae93f	120	params->imagename ? params->imagename : "NULL");
7bf274b9 JC	121
	122	fprintf(stderr, "Available imagename:");
	123	for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
	124	fprintf(stderr, "\t%s", spl_infos[i].imagename);
	125	fprintf(stderr, "\n");
	126
24aae93f	127	return EXIT_FAILURE;
7bf274b9 JC	128	}
	129
	130	const char rkcommon_get_spl_hdr(struct image_tool_params params)
	131	{
	132	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	133
	134	/*
	135	* info would not be NULL, because of we checked params before.
	136	*/
	137	return info->spl_hdr;
	138	}
	139
30827756 PT	140
30827756 PT	141	int rkcommon_get_spl_size(struct image_tool_params *params)
111bcc4f PT	142	{
	143	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	144
	145	/*
	146	* info would not be NULL, because of we checked params before.
	147	*/
30827756	148	return info->spl_size;
111bcc4f PT	149	}
111bcc4f PT	150
30827756	151	bool rkcommon_need_rc4_spl(struct image_tool_params *params)
7bf274b9 JC	152	{
	153	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	154
	155	/*
	156	* info would not be NULL, because of we checked params before.
	157	*/
30827756	158	return info->spl_rc4;
7bf274b9 JC	159	}
7bf274b9 JC	160
30827756	161	bool rkcommon_spl_is_boot0(struct image_tool_params *params)
cfbcdade HS	162	{
	163	struct spl_info *info = rkcommon_get_spl_info(params->imagename);
	164
	165	/*
	166	* info would not be NULL, because of we checked params before.
	167	*/
30827756	168	return info->spl_boot0;
cfbcdade HS	169	}
cfbcdade HS	170
111bcc4f PT	171	static void rkcommon_set_header0(void *buf, uint file_size,
111bcc4f PT	172	struct image_tool_params *params)
a131c1f4	173	{
111bcc4f	174	struct header0_info *hdr = buf;
a131c1f4	175
111bcc4f	176	memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
a131c1f4	177	hdr->signature = RK_SIGNATURE;
cfbcdade	178	hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
3641339e	179	hdr->init_offset = RK_INIT_OFFSET;
a131c1f4	180
a1a2dfb8 PT	181	hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE);
	182	/*
	183	* The init_size has to be a multiple of 4 blocks (i.e. of 2K)
	184	* or the BootROM will not boot the image.
	185	*
	186	* Note: To verify that this is not a legacy constraint, we
	187	* rechecked this against the RK3399 BootROM.
	188	*/
	189	hdr->init_size = ROUND(hdr->init_size, 4);
	190	/*
a1c29d4b PT	191	* init_boot_size needs to be set, as it is read by the BootROM
	192	* to determine the size of the next-stage bootloader (e.g. U-Boot
	193	* proper), when used with the back-to-bootrom functionality.
	194	*
	195	* see https://lists.denx.de/pipermail/u-boot/2017-May/293267.html
	196	* for a more detailed explanation by Andy Yan
a1a2dfb8	197	*/
a1c29d4b	198	hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
a131c1f4 SG	199
a131c1f4 SG	200	rc4_encode(buf, RK_BLK_SIZE, rc4_key);
111bcc4f PT	201	}
	202
	203	int rkcommon_set_header(void *buf, uint file_size,
	204	struct image_tool_params *params)
	205	{
	206	struct header1_info *hdr = buf + RK_SPL_HDR_START;
	207
	208	if (file_size > rkcommon_get_spl_size(params))
	209	return -ENOSPC;
	210
	211	rkcommon_set_header0(buf, file_size, params);
	212
2fb371ff	213	/* Set up the SPL name (i.e. copy spl_hdr over) */
111bcc4f PT	214	memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE);
111bcc4f PT	215
111bcc4f PT	216	if (rkcommon_need_rc4_spl(params))
	217	rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START,
	218	params->file_size - RK_SPL_HDR_START);
a131c1f4 SG	219
	220	return 0;
	221	}
cfbcdade	222
2fb371ff PT	223	static inline unsigned rkcommon_offset_to_spi(unsigned offset)
	224	{
	225	/*
	226	* While SD/MMC images use a flat addressing, SPI images are padded
	227	* to use the first 2K of every 4K sector only.
	228	*/
	229	return ((offset & ~0x7ff) << 1) + (offset & 0x7ff);
	230	}
	231
2fb371ff PT	232	static int rkcommon_parse_header(const void buf, struct header0_info header0,
	233	struct spl_info **spl_info)
	234	{
	235	unsigned hdr1_offset;
	236	struct header1_info hdr1_sdmmc, hdr1_spi;
	237	int i;
	238
	239	if (spl_info)
	240	*spl_info = NULL;
	241
	242	/*
	243	* The first header (hdr0) is always RC4 encoded, so try to decrypt
	244	* with the well-known key.
	245	*/
	246	memcpy((void *)header0, buf, sizeof(struct header0_info));
	247	rc4_encode((void *)header0, sizeof(struct header0_info), rc4_key);
	248
	249	if (header0->signature != RK_SIGNATURE)
	250	return -EPROTO;
	251
	252	/* We don't support RC4 encoded image payloads here, yet... */
	253	if (header0->disable_rc4 == 0)
	254	return -ENOSYS;
	255
	256	hdr1_offset = header0->init_offset * RK_BLK_SIZE;
	257	hdr1_sdmmc = (struct header1_info *)(buf + hdr1_offset);
	258	hdr1_spi = (struct header1_info *)(buf +
	259	rkcommon_offset_to_spi(hdr1_offset));
	260
	261	for (i = 0; i < ARRAY_SIZE(spl_infos); i++) {
	262	if (!memcmp(&hdr1_sdmmc->magic, spl_infos[i].spl_hdr, 4)) {
	263	if (spl_info)
	264	*spl_info = &spl_infos[i];
	265	return IH_TYPE_RKSD;
	266	} else if (!memcmp(&hdr1_spi->magic, spl_infos[i].spl_hdr, 4)) {
	267	if (spl_info)
	268	*spl_info = &spl_infos[i];
	269	return IH_TYPE_RKSPI;
	270	}
	271	}
	272
	273	return -1;
	274	}
	275
	276	int rkcommon_verify_header(unsigned char *buf, int size,
	277	struct image_tool_params *params)
	278	{
	279	struct header0_info header0;
	280	struct spl_info img_spl_info, spl_info;
	281	int ret;
	282
	283	ret = rkcommon_parse_header(buf, &header0, &img_spl_info);
	284
	285	/* If this is the (unimplemented) RC4 case, then rewrite the result */
	286	if (ret == -ENOSYS)
	287	return 0;
	288
	289	if (ret < 0)
	290	return ret;
	291
	292	/*
	293	* If no 'imagename' is specified via the commandline (e.g. if this is
	294	* 'dumpimage -l' w/o any further constraints), we accept any spl_info.
	295	*/
296	if (params->imagename == NULL)
297	return 0;
298
299	/* Match the 'imagename' against the 'spl_hdr' found */
300	spl_info = rkcommon_get_spl_info(params->imagename);
301	if (spl_info && img_spl_info)
302	return strcmp(spl_info->spl_hdr, img_spl_info->spl_hdr);
303
304	return -ENOENT;
305	}
306
307	void rkcommon_print_header(const void *buf)
308	{
309	struct header0_info header0;
310	struct spl_info *spl_info;
311	uint8_t image_type;
312	int ret;
313
314	ret = rkcommon_parse_header(buf, &header0, &spl_info);
315
316	/* If this is the (unimplemented) RC4 case, then fail silently */
317	if (ret == -ENOSYS)
318	return;
319
320	if (ret < 0) {
321	fprintf(stderr, "Error: image verification failed\n");
322	return;
323	}
324
325	image_type = ret;
326
327	printf("Image Type: Rockchip %s (%s) boot image\n",
328	spl_info->spl_hdr,
329	(image_type == IH_TYPE_RKSD) ? "SD/MMC" : "SPI");
330	printf("Data Size: %d bytes\n", header0.init_size * RK_BLK_SIZE);
331	}
332
cfbcdade HS	333	void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
	334	{
	335	unsigned int remaining = size;
	336
	337	while (remaining > 0) {
	338	int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;
	339
	340	rc4_encode(buf + offset, step, rc4_key);
	341	offset += RK_BLK_SIZE;
	342	remaining -= step;
	343	}
	344	}
111bcc4f	345
366aad4d PT	346	int rkcommon_vrec_header(struct image_tool_params *params,
	347	struct image_type_params *tparams,
	348	unsigned int alignment)
111bcc4f	349	{
366aad4d PT	350	unsigned int unpadded_size;
	351	unsigned int padded_size;
	352
111bcc4f PT	353	/*
	354	* The SPL image looks as follows:
	355	*
	356	* 0x0 header0 (see rkcommon.c)
	357	* 0x800 spl_name ('RK30', ..., 'RK33')
ea3729e2 PT	358	* (start of the payload for AArch64 payloads: we expect the
	359	* first 4 bytes to be available for overwriting with our
	360	* spl_name)
111bcc4f	361	* 0x804 first instruction to be executed
ea3729e2	362	* (start of the image/payload for 32bit payloads)
111bcc4f	363	*
ea3729e2 PT	364	* For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is
	365	* required for its sections (so the image we receive needs to
	366	* have the first 4 bytes reserved for the spl_name). Reserving
	367	* these 4 bytes is done using the BOOT0_HOOK infrastructure.
111bcc4f	368	*
ea3729e2 PT	369	* Depending on this, the header is either 0x800 (if this is a
	370	* 'boot0'-style payload, which has reserved 4 bytes at the
	371	* beginning for the 'spl_name' and expects us to overwrite
	372	* its first 4 bytes) or 0x804 bytes in length.
111bcc4f	373	*/
30827756 PT	374	if (rkcommon_spl_is_boot0(params))
30827756 PT	375	tparams->header_size = RK_SPL_HDR_START;
111bcc4f PT	376	else
	377	tparams->header_size = RK_SPL_HDR_START + 4;
	378
	379	/* Allocate, clear and install the header */
	380	tparams->hdr = malloc(tparams->header_size);
22929bec SG	381	if (!tparams->hdr)
22929bec SG	382	return -ENOMEM;
111bcc4f	383	memset(tparams->hdr, 0, tparams->header_size);
366aad4d PT	384
	385	/*
	386	* If someone passed in 0 for the alignment, we'd better handle
	387	* it correctly...
	388	*/
	389	if (!alignment)
	390	alignment = 1;
	391
	392	unpadded_size = tparams->header_size + params->file_size;
	393	padded_size = ROUND(unpadded_size, alignment);
	394
	395	return padded_size - unpadded_size;
111bcc4f	396	}