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1 /*
2  * Copyright (C) 2016 Michal Simek <michals@xilinx.com>
3  * Copyright (C) 2015 Nathan Rossi <nathan@nathanrossi.com>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  *
7  * The following Boot Header format/structures and values are defined in the
8  * following documents:
9  *   * ug1085 ZynqMP TRM (Chapter 9, Table 9-3)
10  *
11  * Expected Header Size = 0x9C0
12  * Forced as 'little' endian, 32-bit words
13  *
14  *  0x  0 - Interrupt table (8 words)
15  *  ...     (Default value = 0xeafffffe)
16  *  0x 1f
17  *  0x 20 - Width detection
18  *         * DEFAULT_WIDTHDETECTION    0xaa995566
19  *  0x 24 - Image identifier
20  *         * DEFAULT_IMAGEIDENTIFIER   0x584c4e58
21  *  0x 28 - Encryption
22  *         * 0x00000000 - None
23  *         * 0xa5c3c5a3 - eFuse
24  *         * 0xa5c3c5a7 - obfuscated key in eFUSE
25  *         * 0x3a5c3c5a - bbRam
26  *         * 0xa35c7ca5 - obfuscated key in boot header
27  *  0x 2C - Image load
28  *  0x 30 - Image offset
29  *  0x 34 - PFW image length
30  *  0x 38 - Total PFW image length
31  *  0x 3C - Image length
32  *  0x 40 - Total image length
33  *  0x 44 - Image attributes
34  *  0x 48 - Header checksum
35  *  0x 4c - Obfuscated key
36  *  ...
37  *  0x 68
38  *  0x 6c - Reserved
39  *  0x 70 - User defined
40  *  ...
41  *  0x 9c
42  *  0x a0 - Secure header initialization vector
43  *  ...
44  *  0x a8
45  *  0x ac - Obfuscated key initialization vector
46  *  ...
47  *  0x b4
48  *  0x b8 - Register Initialization, 511 Address and Data word pairs
49  *         * List is terminated with an address of 0xffffffff or
50  *  ...    * at the max number of entries
51  *  0x8b4
52  *  0x8b8 - Reserved
53  *  ...
54  *  0x9bf
55  *  0x9c0 - Data/Image starts here or above
56  */
57
58 #include "imagetool.h"
59 #include "mkimage.h"
60 #include <image.h>
61
62 #define HEADER_INTERRUPT_DEFAULT (cpu_to_le32(0xeafffffe))
63 #define HEADER_REGINIT_NULL (cpu_to_le32(0xffffffff))
64 #define HEADER_WIDTHDETECTION (cpu_to_le32(0xaa995566))
65 #define HEADER_IMAGEIDENTIFIER (cpu_to_le32(0x584c4e58))
66
67 enum {
68         ENCRYPTION_EFUSE = 0xa5c3c5a3,
69         ENCRYPTION_OEFUSE = 0xa5c3c5a7,
70         ENCRYPTION_BBRAM = 0x3a5c3c5a,
71         ENCRYPTION_OBBRAM = 0xa35c7ca5,
72         ENCRYPTION_NONE = 0x0,
73 };
74
75 struct zynqmp_reginit {
76         uint32_t address;
77         uint32_t data;
78 };
79
80 #define HEADER_INTERRUPT_VECTORS        8
81 #define HEADER_REGINITS                 256
82
83 struct zynqmp_header {
84         uint32_t interrupt_vectors[HEADER_INTERRUPT_VECTORS]; /* 0x0 */
85         uint32_t width_detection; /* 0x20 */
86         uint32_t image_identifier; /* 0x24 */
87         uint32_t encryption; /* 0x28 */
88         uint32_t image_load; /* 0x2c */
89         uint32_t image_offset; /* 0x30 */
90         uint32_t pfw_image_length; /* 0x34 */
91         uint32_t total_pfw_image_length; /* 0x38 */
92         uint32_t image_size; /* 0x3c */
93         uint32_t image_stored_size; /* 0x40 */
94         uint32_t image_attributes; /* 0x44 */
95         uint32_t checksum; /* 0x48 */
96         uint32_t __reserved1[27]; /* 0x4c */
97         struct zynqmp_reginit register_init[HEADER_REGINITS]; /* 0xb8 */
98         uint32_t __reserved4[66]; /* 0x9c0 */
99 };
100
101 static struct zynqmp_header zynqmpimage_header;
102
103 static uint32_t zynqmpimage_checksum(struct zynqmp_header *ptr)
104 {
105         uint32_t checksum = 0;
106
107         if (ptr == NULL)
108                 return 0;
109
110         checksum += le32_to_cpu(ptr->width_detection);
111         checksum += le32_to_cpu(ptr->image_identifier);
112         checksum += le32_to_cpu(ptr->encryption);
113         checksum += le32_to_cpu(ptr->image_load);
114         checksum += le32_to_cpu(ptr->image_offset);
115         checksum += le32_to_cpu(ptr->pfw_image_length);
116         checksum += le32_to_cpu(ptr->total_pfw_image_length);
117         checksum += le32_to_cpu(ptr->image_size);
118         checksum += le32_to_cpu(ptr->image_stored_size);
119         checksum += le32_to_cpu(ptr->image_attributes);
120         checksum = ~checksum;
121
122         return cpu_to_le32(checksum);
123 }
124
125 static void zynqmpimage_default_header(struct zynqmp_header *ptr)
126 {
127         int i;
128
129         if (ptr == NULL)
130                 return;
131
132         ptr->width_detection = HEADER_WIDTHDETECTION;
133         ptr->image_attributes = 0x800;
134         ptr->image_identifier = HEADER_IMAGEIDENTIFIER;
135         ptr->encryption = cpu_to_le32(ENCRYPTION_NONE);
136
137         /* Setup not-supported/constant/reserved fields */
138         for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++)
139                 ptr->interrupt_vectors[i] = HEADER_INTERRUPT_DEFAULT;
140
141         for (i = 0; i < HEADER_REGINITS; i++) {
142                 ptr->register_init[i].address = HEADER_REGINIT_NULL;
143                 ptr->register_init[i].data = 0;
144         }
145
146         /*
147          * Certain reserved fields are required to be set to 0, ensure they are
148          * set as such.
149          */
150         ptr->pfw_image_length = 0x0;
151         ptr->total_pfw_image_length = 0x0;
152 }
153
154 /* mkimage glue functions */
155 static int zynqmpimage_verify_header(unsigned char *ptr, int image_size,
156                 struct image_tool_params *params)
157 {
158         struct zynqmp_header *zynqhdr = (struct zynqmp_header *)ptr;
159
160         if (image_size < sizeof(struct zynqmp_header))
161                 return -1;
162
163         if (zynqhdr->width_detection != HEADER_WIDTHDETECTION)
164                 return -1;
165         if (zynqhdr->image_identifier != HEADER_IMAGEIDENTIFIER)
166                 return -1;
167
168         if (zynqmpimage_checksum(zynqhdr) != zynqhdr->checksum)
169                 return -1;
170
171         return 0;
172 }
173
174 static void zynqmpimage_print_header(const void *ptr)
175 {
176         struct zynqmp_header *zynqhdr = (struct zynqmp_header *)ptr;
177         int i;
178
179         printf("Image Type   : Xilinx Zynq Boot Image support\n");
180         printf("Image Offset : 0x%08x\n", le32_to_cpu(zynqhdr->image_offset));
181         printf("Image Size   : %lu bytes (%lu bytes packed)\n",
182                (unsigned long)le32_to_cpu(zynqhdr->image_size),
183                (unsigned long)le32_to_cpu(zynqhdr->image_stored_size));
184         printf("Image Load   : 0x%08x\n", le32_to_cpu(zynqhdr->image_load));
185         printf("Checksum     : 0x%08x\n", le32_to_cpu(zynqhdr->checksum));
186
187         for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++) {
188                 if (zynqhdr->interrupt_vectors[i] == HEADER_INTERRUPT_DEFAULT)
189                         continue;
190
191                 printf("Modified Interrupt Vector Address [%d]: 0x%08x\n", i,
192                        le32_to_cpu(zynqhdr->interrupt_vectors[i]));
193         }
194
195         for (i = 0; i < HEADER_REGINITS; i++) {
196                 if (zynqhdr->register_init[i].address == HEADER_REGINIT_NULL)
197                         break;
198
199                 if (i == 0)
200                         printf("Custom Register Initialization:\n");
201
202                 printf("    @ 0x%08x -> 0x%08x\n",
203                        le32_to_cpu(zynqhdr->register_init[i].address),
204                        le32_to_cpu(zynqhdr->register_init[i].data));
205         }
206 }
207
208 static int zynqmpimage_check_params(struct image_tool_params *params)
209 {
210         if (!params)
211                 return 0;
212
213         if (params->addr != 0x0) {
214                 fprintf(stderr, "Error: Load Address cannot be specified.\n");
215                 return -1;
216         }
217
218         /*
219          * If the entry point is specified ensure it is 64 byte aligned.
220          */
221         if (params->eflag && (params->ep % 64 != 0)) {
222                 fprintf(stderr,
223                         "Error: Entry Point must be aligned to a 64-byte boundary.\n");
224                 return -1;
225         }
226
227         return !(params->lflag || params->dflag);
228 }
229
230 static int zynqmpimage_check_image_types(uint8_t type)
231 {
232         if (type == IH_TYPE_ZYNQMPIMAGE)
233                 return EXIT_SUCCESS;
234         return EXIT_FAILURE;
235 }
236
237 static void zynqmpimage_parse_initparams(struct zynqmp_header *zynqhdr,
238         const char *filename)
239 {
240         FILE *fp;
241         struct zynqmp_reginit reginit;
242         unsigned int reg_count = 0;
243         int r, err;
244         struct stat path_stat;
245
246         /* Expect a table of register-value pairs, e.g. "0x12345678 0x4321" */
247         fp = fopen(filename, "r");
248         if (!fp) {
249                 fprintf(stderr, "Cannot open initparams file: %s\n", filename);
250                 exit(1);
251         }
252
253         err = fstat(fileno(fp), &path_stat);
254         if (err) {
255                 fclose(fp);
256                 return;
257         }
258
259         if (!S_ISREG(path_stat.st_mode)) {
260                 fclose(fp);
261                 return;
262         }
263
264         do {
265                 r = fscanf(fp, "%x %x", &reginit.address, &reginit.data);
266                 if (r == 2) {
267                         zynqhdr->register_init[reg_count] = reginit;
268                         ++reg_count;
269                 }
270                 r = fscanf(fp, "%*[^\n]\n"); /* Skip to next line */
271         } while ((r != EOF) && (reg_count < HEADER_REGINITS));
272         fclose(fp);
273 }
274
275 static void zynqmpimage_set_header(void *ptr, struct stat *sbuf, int ifd,
276                 struct image_tool_params *params)
277 {
278         struct zynqmp_header *zynqhdr = (struct zynqmp_header *)ptr;
279         zynqmpimage_default_header(zynqhdr);
280
281         /* place image directly after header */
282         zynqhdr->image_offset =
283                 cpu_to_le32((uint32_t)sizeof(struct zynqmp_header));
284         zynqhdr->image_size = cpu_to_le32(params->file_size -
285                                           sizeof(struct zynqmp_header));
286         zynqhdr->image_stored_size = zynqhdr->image_size;
287         zynqhdr->image_load = 0xfffc0000;
288         if (params->eflag)
289                 zynqhdr->image_load = cpu_to_le32((uint32_t)params->ep);
290
291         /* User can pass in text file with init list */
292         if (strlen(params->imagename2))
293                 zynqmpimage_parse_initparams(zynqhdr, params->imagename2);
294
295         zynqhdr->checksum = zynqmpimage_checksum(zynqhdr);
296 }
297
298 U_BOOT_IMAGE_TYPE(
299         zynqmpimage,
300         "Xilinx ZynqMP Boot Image support",
301         sizeof(struct zynqmp_header),
302         (void *)&zynqmpimage_header,
303         zynqmpimage_check_params,
304         zynqmpimage_verify_header,
305         zynqmpimage_print_header,
306         zynqmpimage_set_header,
307         NULL,
308         zynqmpimage_check_image_types,
309         NULL,
310         NULL
311 );