summaryrefslogtreecommitdiffstats
path: root/tools/zynqimage.c
blob: c43bd5d48820a1ba9337cc93b85fff08f21d461a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
 * Copyright (C) 2015 Nathan Rossi <nathan@nathanrossi.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * The following Boot Header format/structures and values are defined in the
 * following documents:
 *   * Xilinx Zynq-7000 Technical Reference Manual (Section 6.3)
 *   * Xilinx Zynq-7000 Software Developers Guide (Appendix A.7 and A.8)
 *
 * Expected Header Size = 0x8C0
 * Forced as 'little' endian, 32-bit words
 *
 *  0x  0 - Interrupt Table (8 words)
 *  ...     (Default value = 0xeafffffe)
 *  0x 1f
 *  0x 20 - Width Detection
 *         * DEFAULT_WIDTHDETECTION    0xaa995566
 *  0x 24 - Image Identifier
 *         * DEFAULT_IMAGEIDENTIFIER   0x584c4e58
 *  0x 28 - Encryption
 *         * 0x00000000 - None
 *         * 0xa5c3c5a3 - eFuse
 *         * 0x3a5c3c5a - bbRam
 *  0x 2C - User Field
 *  0x 30 - Image Offset
 *  0x 34 - Image Size
 *  0x 38 - Reserved (0x00000000) (according to spec)
 *          * FSBL defines this field for Image Destination Address.
 *  0x 3C - Image Load
 *  0x 40 - Image Stored Size
 *  0x 44 - Reserved (0x00000000) (according to spec)
 *          * FSBL defines this field for QSPI configuration Data.
 *  0x 48 - Checksum
 *  0x 4c - Unused (21 words)
 *  ...
 *  0x 9c
 *  0x a0 - Register Initialization, 256 Address and Data word pairs
 *         * List is terminated with an address of 0xffffffff or
 *  ...    * at the max number of entries
 *  0x89c
 *  0x8a0 - Unused (8 words)
 *  ...
 *  0x8bf
 *  0x8c0 - Data/Image starts here or above
 */

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

#define HEADER_INTERRUPT_DEFAULT (cpu_to_le32(0xeafffffe))
#define HEADER_REGINIT_NULL (cpu_to_le32(0xffffffff))
#define HEADER_WIDTHDETECTION (cpu_to_le32(0xaa995566))
#define HEADER_IMAGEIDENTIFIER (cpu_to_le32(0x584c4e58))

enum {
	ENCRYPTION_EFUSE = 0xa5c3c5a3,
	ENCRYPTION_BBRAM = 0x3a5c3c5a,
	ENCRYPTION_NONE = 0x0,
};

struct zynq_reginit {
	uint32_t address;
	uint32_t data;
};

#define HEADER_INTERRUPT_VECTORS 8
#define HEADER_REGINITS 256

struct zynq_header {
	uint32_t interrupt_vectors[HEADER_INTERRUPT_VECTORS]; /* 0x0 */
	uint32_t width_detection; /* 0x20 */
	uint32_t image_identifier; /* 0x24 */
	uint32_t encryption; /* 0x28 */
	uint32_t user_field; /* 0x2c */
	uint32_t image_offset; /* 0x30 */
	uint32_t image_size; /* 0x34 */
	uint32_t __reserved1; /* 0x38 */
	uint32_t image_load; /* 0x3c */
	uint32_t image_stored_size; /* 0x40 */
	uint32_t __reserved2; /* 0x44 */
	uint32_t checksum; /* 0x48 */
	uint32_t __reserved3[21]; /* 0x4c */
	struct zynq_reginit register_init[HEADER_REGINITS]; /* 0xa0 */
	uint32_t __reserved4[8]; /* 0x8a0 */
};

static struct zynq_header zynqimage_header;

static uint32_t zynqimage_checksum(struct zynq_header *ptr)
{
	uint32_t checksum = 0;

	if (ptr == NULL)
		return 0;

	checksum += le32_to_cpu(ptr->width_detection);
	checksum += le32_to_cpu(ptr->image_identifier);
	checksum += le32_to_cpu(ptr->encryption);
	checksum += le32_to_cpu(ptr->user_field);
	checksum += le32_to_cpu(ptr->image_offset);
	checksum += le32_to_cpu(ptr->image_size);
	checksum += le32_to_cpu(ptr->__reserved1);
	checksum += le32_to_cpu(ptr->image_load);
	checksum += le32_to_cpu(ptr->image_stored_size);
	checksum += le32_to_cpu(ptr->__reserved2);
	checksum = ~checksum;

	return cpu_to_le32(checksum);
}

static void zynqimage_default_header(struct zynq_header *ptr)
{
	int i;

	if (ptr == NULL)
		return;

	ptr->width_detection = HEADER_WIDTHDETECTION;
	ptr->image_identifier = HEADER_IMAGEIDENTIFIER;
	ptr->encryption = cpu_to_le32(ENCRYPTION_NONE);

	/* Setup not-supported/constant/reserved fields */
	for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++)
		ptr->interrupt_vectors[i] = HEADER_INTERRUPT_DEFAULT;

	for (i = 0; i < HEADER_REGINITS; i++) {
		ptr->register_init[i].address = HEADER_REGINIT_NULL;
		ptr->register_init[i].data = HEADER_REGINIT_NULL;
	}

	/*
	 * Certain reserved fields are required to be set to 0, ensure they are
	 * set as such.
	 */
	ptr->__reserved1 = 0x0;
	ptr->__reserved2 = 0x0;
}

/* mkimage glue functions */
static int zynqimage_verify_header(unsigned char *ptr, int image_size,
		struct image_tool_params *params)
{
	struct zynq_header *zynqhdr = (struct zynq_header *)ptr;

	if (image_size < sizeof(struct zynq_header))
		return -1;

	if (zynqhdr->width_detection != HEADER_WIDTHDETECTION)
		return -1;
	if (zynqhdr->image_identifier != HEADER_IMAGEIDENTIFIER)
		return -1;

	if (zynqimage_checksum(zynqhdr) != zynqhdr->checksum)
		return -1;

	return 0;
}

static void zynqimage_print_header(const void *ptr)
{
	struct zynq_header *zynqhdr = (struct zynq_header *)ptr;
	int i;

	printf("Image Type   : Xilinx Zynq Boot Image support\n");
	printf("Image Offset : 0x%08x\n", le32_to_cpu(zynqhdr->image_offset));
	printf("Image Size   : %lu bytes (%lu bytes packed)\n",
	       (unsigned long)le32_to_cpu(zynqhdr->image_size),
	       (unsigned long)le32_to_cpu(zynqhdr->image_stored_size));
	printf("Image Load   : 0x%08x\n", le32_to_cpu(zynqhdr->image_load));
	printf("User Field   : 0x%08x\n", le32_to_cpu(zynqhdr->user_field));
	printf("Checksum     : 0x%08x\n", le32_to_cpu(zynqhdr->checksum));

	for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++) {
		if (zynqhdr->interrupt_vectors[i] == HEADER_INTERRUPT_DEFAULT)
			continue;

		printf("Modified Interrupt Vector Address [%d]: 0x%08x\n", i,
		       le32_to_cpu(zynqhdr->interrupt_vectors[i]));
	}

	for (i = 0; i < HEADER_REGINITS; i++) {
		if (zynqhdr->register_init[i].address == HEADER_REGINIT_NULL)
			break;

		if (i == 0)
			printf("Custom Register Initialization:\n");

		printf("    @ 0x%08x -> 0x%08x\n",
		       le32_to_cpu(zynqhdr->register_init[i].address),
		       le32_to_cpu(zynqhdr->register_init[i].data));
	}
}

static int zynqimage_check_params(struct image_tool_params *params)
{
	if (!params)
		return 0;

	if (params->addr != 0x0) {
		fprintf(stderr, "Error: Load Address cannot be specified.\n");
		return -1;
	}

	/*
	 * If the entry point is specified ensure it is 64 byte aligned.
	 */
	if (params->eflag && (params->ep % 64 != 0)) {
		fprintf(stderr,
			"Error: Entry Point must be aligned to a 64-byte boundary.\n");
		return -1;
	}

	return !(params->lflag || params->dflag);
}

static int zynqimage_check_image_types(uint8_t type)
{
	if (type == IH_TYPE_ZYNQIMAGE)
		return EXIT_SUCCESS;
	return EXIT_FAILURE;
}

static void zynqimage_set_header(void *ptr, struct stat *sbuf, int ifd,
		struct image_tool_params *params)
{
	struct zynq_header *zynqhdr = (struct zynq_header *)ptr;
	zynqimage_default_header(zynqhdr);

	/* place image directly after header */
	zynqhdr->image_offset =
		cpu_to_le32((uint32_t)sizeof(struct zynq_header));
	zynqhdr->image_size = cpu_to_le32((uint32_t)sbuf->st_size);
	zynqhdr->image_stored_size = zynqhdr->image_size;
	zynqhdr->image_load = 0x0;
	if (params->eflag)
		zynqhdr->image_load = cpu_to_le32((uint32_t)params->ep);

	zynqhdr->checksum = zynqimage_checksum(zynqhdr);
}

U_BOOT_IMAGE_TYPE(
	zynqimage,
	"Xilinx Zynq Boot Image support",
	sizeof(struct zynq_header),
	(void *)&zynqimage_header,
	zynqimage_check_params,
	zynqimage_verify_header,
	zynqimage_print_header,
	zynqimage_set_header,
	NULL,
	zynqimage_check_image_types,
	NULL,
	NULL
);