2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
7 * Helper functions for Rockchip images
10 #include "imagetool.h"
16 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
19 RK_SIGNATURE = 0x0ff0aa55,
23 * struct header0_info - header block for boot ROM
25 * This is stored at SD card block 64 (where each block is 512 bytes, or at
26 * the start of SPI flash. It is encoded with RC4.
28 * @signature: Signature (must be RKSD_SIGNATURE)
29 * @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
30 * @init_offset: Offset in blocks of the SPL code from this header
31 * block. E.g. 4 means 2KB after the start of this header.
32 * Other fields are not used by U-Boot
39 uint8_t reserved1[492];
41 uint16_t init_boot_size;
53 * struct spl_info - spl info for each chip
55 * @imagename: Image name(passed by "mkimage -n")
56 * @spl_hdr: Boot ROM requires a 4-bytes spl header
57 * @spl_size: Spl size(include extra 4-bytes spl header)
58 * @spl_rc4: RC4 encode the SPL binary (same key as header)
59 * @spl_boot0: A new-style (ARM_SOC_BOOT0_HOOK) image that should
60 * have the boot magic (e.g. 'RK33') written to its first
65 const char *imagename;
67 const uint32_t spl_size;
72 static struct spl_info spl_infos[] = {
73 { "rk3036", "RK30", 0x1000, false, false },
74 { "rk3188", "RK31", 0x8000 - 0x800, true, false },
75 { "rk3288", "RK32", 0x8000, false, false },
76 { "rk3328", "RK32", 0x8000 - 0x1000, false, false },
77 { "rk3399", "RK33", 0x20000, false, true },
80 static unsigned char rc4_key[16] = {
81 124, 78, 3, 4, 85, 5, 9, 7,
82 45, 44, 123, 56, 23, 13, 23, 17
85 static struct spl_info *rkcommon_get_spl_info(char *imagename)
92 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
93 if (!strncmp(imagename, spl_infos[i].imagename, 6))
99 int rkcommon_check_params(struct image_tool_params *params)
103 if (rkcommon_get_spl_info(params->imagename) != NULL)
107 * If this is a operation (list or extract), the don't require
108 * imagename to be set.
110 if (params->lflag || params->iflag)
113 fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
114 params->imagename ? params->imagename : "NULL");
116 fprintf(stderr, "Available imagename:");
117 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
118 fprintf(stderr, "\t%s", spl_infos[i].imagename);
119 fprintf(stderr, "\n");
124 const char *rkcommon_get_spl_hdr(struct image_tool_params *params)
126 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
129 * info would not be NULL, because of we checked params before.
131 return info->spl_hdr;
135 int rkcommon_get_spl_size(struct image_tool_params *params)
137 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
140 * info would not be NULL, because of we checked params before.
142 return info->spl_size;
145 bool rkcommon_need_rc4_spl(struct image_tool_params *params)
147 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
150 * info would not be NULL, because of we checked params before.
152 return info->spl_rc4;
155 bool rkcommon_spl_is_boot0(struct image_tool_params *params)
157 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
160 * info would not be NULL, because of we checked params before.
162 return info->spl_boot0;
165 static void rkcommon_set_header0(void *buf, uint file_size,
166 struct image_tool_params *params)
168 struct header0_info *hdr = buf;
170 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
171 hdr->signature = RK_SIGNATURE;
172 hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
173 hdr->init_offset = RK_INIT_OFFSET;
175 hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE);
177 * The init_size has to be a multiple of 4 blocks (i.e. of 2K)
178 * or the BootROM will not boot the image.
180 * Note: To verify that this is not a legacy constraint, we
181 * rechecked this against the RK3399 BootROM.
183 hdr->init_size = ROUND(hdr->init_size, 4);
185 * The images we create do not contain the stage following the SPL as
186 * part of the SPL image, so the init_boot_size (which might have been
187 * read by Rockchip's miniloder) should be the same as the init_size.
189 hdr->init_boot_size = hdr->init_size;
191 rc4_encode(buf, RK_BLK_SIZE, rc4_key);
194 int rkcommon_set_header(void *buf, uint file_size,
195 struct image_tool_params *params)
197 struct header1_info *hdr = buf + RK_SPL_HDR_START;
199 if (file_size > rkcommon_get_spl_size(params))
202 rkcommon_set_header0(buf, file_size, params);
204 /* Set up the SPL name */
205 memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE);
207 if (rkcommon_need_rc4_spl(params))
208 rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START,
209 params->file_size - RK_SPL_HDR_START);
214 void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
216 unsigned int remaining = size;
218 while (remaining > 0) {
219 int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;
221 rc4_encode(buf + offset, step, rc4_key);
222 offset += RK_BLK_SIZE;
227 int rkcommon_vrec_header(struct image_tool_params *params,
228 struct image_type_params *tparams,
229 unsigned int alignment)
231 unsigned int unpadded_size;
232 unsigned int padded_size;
235 * The SPL image looks as follows:
237 * 0x0 header0 (see rkcommon.c)
238 * 0x800 spl_name ('RK30', ..., 'RK33')
239 * (start of the payload for AArch64 payloads: we expect the
240 * first 4 bytes to be available for overwriting with our
242 * 0x804 first instruction to be executed
243 * (start of the image/payload for 32bit payloads)
245 * For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is
246 * required for its sections (so the image we receive needs to
247 * have the first 4 bytes reserved for the spl_name). Reserving
248 * these 4 bytes is done using the BOOT0_HOOK infrastructure.
250 * Depending on this, the header is either 0x800 (if this is a
251 * 'boot0'-style payload, which has reserved 4 bytes at the
252 * beginning for the 'spl_name' and expects us to overwrite
253 * its first 4 bytes) or 0x804 bytes in length.
255 if (rkcommon_spl_is_boot0(params))
256 tparams->header_size = RK_SPL_HDR_START;
258 tparams->header_size = RK_SPL_HDR_START + 4;
260 /* Allocate, clear and install the header */
261 tparams->hdr = malloc(tparams->header_size);
262 memset(tparams->hdr, 0, tparams->header_size);
263 tparams->header_size = tparams->header_size;
266 * If someone passed in 0 for the alignment, we'd better handle
272 unpadded_size = tparams->header_size + params->file_size;
273 padded_size = ROUND(unpadded_size, alignment);
275 return padded_size - unpadded_size;