aboutsummaryrefslogtreecommitdiff
path: root/plat/common/plat_spm_rd.c
blob: 0c72cb7aa82514616b31da89f6bd5ff6282bf2e5 (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
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
/*
 * Copyright (c) 2018, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>
#include <string.h>

#include <libfdt.h>

#include <platform_def.h>

#include <common/debug.h>
#include <common/fdt_wrappers.h>
#include <lib/object_pool.h>
#include <services/sp_res_desc.h>

/*******************************************************************************
 * Resource pool
 ******************************************************************************/
static struct sp_rd_sect_mem_region rd_mem_regions[PLAT_SPM_MEM_REGIONS_MAX];
static OBJECT_POOL_ARRAY(rd_mem_regions_pool, rd_mem_regions);

static struct sp_rd_sect_notification rd_notifs[PLAT_SPM_NOTIFICATIONS_MAX];
static OBJECT_POOL_ARRAY(rd_notifs_pool, rd_notifs);

static struct sp_rd_sect_service rd_services[PLAT_SPM_SERVICES_MAX];
static OBJECT_POOL_ARRAY(rd_services_pool, rd_services);

/*******************************************************************************
 * Attribute section handler
 ******************************************************************************/
static void rd_parse_attribute(struct sp_rd_sect_attribute *attr,
			       const void *fdt, int node)
{
	int rc = 0;

	/* The minimum size that can be read from the DTB is 32-bit. */
	uint32_t version, sp_type, runtime_el, exec_type;
	uint32_t panic_policy, xlat_granule;

	rc |= fdtw_read_cells(fdt, node, "version", 1, &version);

	if (version != 1) {
		ERROR("Unsupported resource description version: 0x%x\n",
		      version);
		panic();
	}

	rc |= fdtw_read_cells(fdt, node, "sp_type", 1, &sp_type);
	rc |= fdtw_read_cells(fdt, node, "pe_mpidr", 1, &attr->pe_mpidr);
	rc |= fdtw_read_cells(fdt, node, "runtime_el", 1, &runtime_el);
	rc |= fdtw_read_cells(fdt, node, "exec_type", 1, &exec_type);
	rc |= fdtw_read_cells(fdt, node, "panic_policy", 1, &panic_policy);
	rc |= fdtw_read_cells(fdt, node, "xlat_granule", 1, &xlat_granule);
	rc |= fdtw_read_cells(fdt, node, "binary_size", 1, &attr->binary_size);
	rc |= fdtw_read_cells(fdt, node, "load_address", 2, &attr->load_address);
	rc |= fdtw_read_cells(fdt, node, "entrypoint", 2, &attr->entrypoint);

	attr->version = version;
	attr->sp_type = sp_type;
	attr->runtime_el = runtime_el;
	attr->exec_type = exec_type;
	attr->panic_policy = panic_policy;
	attr->xlat_granule = xlat_granule;

	VERBOSE(" Attribute Section:\n");
	VERBOSE("  version: 0x%x\n", version);
	VERBOSE("  sp_type: 0x%x\n", sp_type);
	VERBOSE("  pe_mpidr: 0x%x\n", attr->pe_mpidr);
	VERBOSE("  runtime_el: 0x%x\n", runtime_el);
	VERBOSE("  exec_type: 0x%x\n", exec_type);
	VERBOSE("  panic_policy: 0x%x\n", panic_policy);
	VERBOSE("  xlat_granule: 0x%x\n", xlat_granule);
	VERBOSE("  binary_size: 0x%x\n", attr->binary_size);
	VERBOSE("  load_address: 0x%llx\n", attr->load_address);
	VERBOSE("  entrypoint: 0x%llx\n", attr->entrypoint);

	if (rc) {
		ERROR("Failed to read attribute node elements.\n");
		panic();
	}
}

/*******************************************************************************
 * Memory regions section handlers
 ******************************************************************************/
static void rd_parse_memory_region(struct sp_rd_sect_mem_region *rdmem,
				   const void *fdt, int node)
{
	int rc = 0;
	char name[RD_MEM_REGION_NAME_LEN];

	rc |= fdtw_read_string(fdt, node, "str", (char *)&name, sizeof(name));
	rc |= fdtw_read_cells(fdt, node, "attr", 1, &rdmem->attr);
	rc |= fdtw_read_cells(fdt, node, "base", 2, &rdmem->base);
	rc |= fdtw_read_cells(fdt, node, "size", 2, &rdmem->size);

	size_t len = strlcpy(rdmem->name, name, RD_MEM_REGION_NAME_LEN);

	if (len >= RD_MEM_REGION_NAME_LEN) {
		WARN("Memory region name truncated: '%s'\n", name);
	}

	VERBOSE(" Memory Region:\n");
	VERBOSE("  name: '%s'\n", rdmem->name);
	VERBOSE("  attr: 0x%x\n", rdmem->attr);
	VERBOSE("  base: 0x%llx\n", rdmem->base);
	VERBOSE("  size: 0x%llx\n", rdmem->size);

	if (rc) {
		ERROR("Failed to read mem_region node elements.\n");
		panic();
	}
}

static void rd_parse_memory_regions(struct sp_res_desc *rd, const void *fdt,
				    int node)
{
	int child;
	struct sp_rd_sect_mem_region *rdmem, *old_rdmem;

	fdt_for_each_subnode(child, fdt, node) {
		rdmem = pool_alloc(&rd_mem_regions_pool);

		/* Add element to the start of the list */
		old_rdmem = rd->mem_region;
		rd->mem_region = rdmem;
		rdmem->next = old_rdmem;

		rd_parse_memory_region(rdmem, fdt, child);
	}

	if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) {
		ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, node);
		panic();
	}
}

/*******************************************************************************
 * Notifications section handlers
 ******************************************************************************/
static void rd_parse_notification(struct sp_rd_sect_notification *rdnot,
				   const void *fdt, int node)
{
	int rc = 0;

	rc |= fdtw_read_cells(fdt, node, "attr", 1, &rdnot->attr);
	rc |= fdtw_read_cells(fdt, node, "pe", 1, &rdnot->pe);

	VERBOSE(" Notification:\n");
	VERBOSE("  attr: 0x%x\n", rdnot->attr);
	VERBOSE("  pe: 0x%x\n", rdnot->pe);

	if (rc) {
		ERROR("Failed to read notification node elements.\n");
		panic();
	}
}

static void rd_parse_notifications(struct sp_res_desc *rd, const void *fdt, int node)
{
	int child;
	struct sp_rd_sect_notification *rdnot, *old_rdnot;

	fdt_for_each_subnode(child, fdt, node) {
		rdnot = pool_alloc(&rd_notifs_pool);

		/* Add element to the start of the list */
		old_rdnot = rd->notification;
		rd->notification = rdnot;
		rdnot->next = old_rdnot;

		rd_parse_notification(rdnot, fdt, child);
	}

	if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) {
		ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, child);
		panic();
	}
}

/*******************************************************************************
 * Services section handlers
 ******************************************************************************/
static void rd_parse_service(struct sp_rd_sect_service *rdsvc, const void *fdt,
			     int node)
{
	int rc = 0;

	/* The minimum size that can be read from the DTB is 32-bit. */
	uint32_t accessibility, request_type, connection_quota;

	rc |= fdtw_read_array(fdt, node, "uuid", 4, &rdsvc->uuid);
	rc |= fdtw_read_cells(fdt, node, "accessibility", 1, &accessibility);
	rc |= fdtw_read_cells(fdt, node, "request_type", 1, &request_type);
	rc |= fdtw_read_cells(fdt, node, "connection_quota", 1, &connection_quota);
	rc |= fdtw_read_cells(fdt, node, "sec_mem_size", 1, &rdsvc->secure_mem_size);
	rc |= fdtw_read_cells(fdt, node, "interrupt_num", 1, &rdsvc->interrupt_num);

	rdsvc->accessibility = accessibility;
	rdsvc->request_type = request_type;
	rdsvc->connection_quota = connection_quota;

	VERBOSE(" Service:\n");
	VERBOSE("  uuid: 0x%08x 0x%08x 0x%08x 0x%08x\n", rdsvc->uuid[0],
		rdsvc->uuid[1], rdsvc->uuid[2], rdsvc->uuid[3]);
	VERBOSE("  accessibility: 0x%x\n", accessibility);
	VERBOSE("  request_type: 0x%x\n", request_type);
	VERBOSE("  connection_quota: 0x%x\n", connection_quota);
	VERBOSE("  secure_memory_size: 0x%x\n", rdsvc->secure_mem_size);
	VERBOSE("  interrupt_num: 0x%x\n", rdsvc->interrupt_num);

	if (rc) {
		ERROR("Failed to read attribute node elements.\n");
		panic();
	}
}

static void rd_parse_services(struct sp_res_desc *rd, const void *fdt, int node)
{
	int child;
	struct sp_rd_sect_service *rdsvc, *old_rdsvc;

	fdt_for_each_subnode(child, fdt, node) {
		rdsvc = pool_alloc(&rd_services_pool);

		/* Add element to the start of the list */
		old_rdsvc = rd->service;
		rd->service = rdsvc;
		rdsvc->next = old_rdsvc;

		rd_parse_service(rdsvc, fdt, child);
	}

	if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) {
		ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, node);
		panic();
	}
}

/*******************************************************************************
 * Root node handler
 ******************************************************************************/
static void rd_parse_root(struct sp_res_desc *rd, const void *fdt, int root)
{
	int node;
	char *str;

	str = "attribute";
	node = fdt_subnode_offset_namelen(fdt, root, str, strlen(str));
	if (node < 0) {
		ERROR("Root node doesn't contain subnode '%s'\n", str);
		panic();
	} else {
		rd_parse_attribute(&rd->attribute, fdt, node);
	}

	str = "memory_regions";
	node = fdt_subnode_offset_namelen(fdt, root, str, strlen(str));
	if (node < 0) {
		ERROR("Root node doesn't contain subnode '%s'\n", str);
		panic();
	} else {
		rd_parse_memory_regions(rd, fdt, node);
	}

	str = "notifications";
	node = fdt_subnode_offset_namelen(fdt, root, str, strlen(str));
	if (node < 0) {
		WARN("Root node doesn't contain subnode '%s'\n", str);
	} else {
		rd_parse_notifications(rd, fdt, node);
	}

	str = "services";
	node = fdt_subnode_offset_namelen(fdt, root, str, strlen(str));
	if (node < 0) {
		WARN("Root node doesn't contain subnode '%s'\n", str);
	} else {
		rd_parse_services(rd, fdt, node);
	}
}

/*******************************************************************************
 * Platform handler to load resource descriptor blobs into the active Secure
 * Partition context.
 ******************************************************************************/
int plat_spm_sp_rd_load(struct sp_res_desc *rd, const void *ptr, size_t size)
{
	int rc;
	int root_node;

	assert(rd != NULL);
	assert(ptr != NULL);

	INFO("Reading RD blob at address %p\n", ptr);

	rc = fdt_check_header(ptr);
	if (rc != 0) {
		ERROR("Wrong format for resource descriptor blob (%d).\n", rc);
		return -1;
	}

	root_node = fdt_node_offset_by_compatible(ptr, -1, "arm,sp_rd");
	if (root_node < 0) {
		ERROR("Unrecognized resource descriptor blob (%d)\n", rc);
		return -1;
	}

	rd_parse_root(rd, ptr, root_node);

	return 0;
}