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7#include <common.h>
8#include <command.h>
9#include <efi.h>
10#include <errno.h>
11#include <log.h>
12#include <malloc.h>
13#include <sort.h>
14#include <asm/global_data.h>
15
16static const char *const type_name[] = {
17 "reserved",
18 "loader_code",
19 "loader_data",
20 "bs_code",
21 "bs_data",
22 "rt_code",
23 "rt_data",
24 "conv",
25 "unusable",
26 "acpi_reclaim",
27 "acpi_nvs",
28 "io",
29 "io_port",
30 "pal_code",
31};
32
33static struct attr_info {
34 u64 val;
35 const char *name;
36} mem_attr[] = {
37 { EFI_MEMORY_UC, "uncached" },
38 { EFI_MEMORY_WC, "write-coalescing" },
39 { EFI_MEMORY_WT, "write-through" },
40 { EFI_MEMORY_WB, "write-back" },
41 { EFI_MEMORY_UCE, "uncached & exported" },
42 { EFI_MEMORY_WP, "write-protect" },
43 { EFI_MEMORY_RP, "read-protect" },
44 { EFI_MEMORY_XP, "execute-protect" },
45 { EFI_MEMORY_NV, "non-volatile" },
46 { EFI_MEMORY_MORE_RELIABLE, "higher reliability" },
47 { EFI_MEMORY_RO, "read-only" },
48 { EFI_MEMORY_SP, "specific purpose" },
49 { EFI_MEMORY_RUNTIME, "needs runtime mapping" }
50};
51
52
53#define ATTR_SEEN_MAX 30
54
55static inline bool is_boot_services(int type)
56{
57 return type == EFI_LOADER_CODE || type == EFI_LOADER_DATA ||
58 type == EFI_BOOT_SERVICES_CODE ||
59 type == EFI_BOOT_SERVICES_DATA;
60}
61
62static int h_cmp_entry(const void *v1, const void *v2)
63{
64 const struct efi_mem_desc *desc1 = v1;
65 const struct efi_mem_desc *desc2 = v2;
66 int64_t diff = desc1->physical_start - desc2->physical_start;
67
68
69
70
71
72 return diff < 0 ? -1 : diff > 0 ? 1 : 0;
73}
74
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83
84
85
86static void *efi_build_mem_table(struct efi_entry_memmap *map, int size,
87 bool skip_bs)
88{
89 struct efi_mem_desc *desc, *end, *base, *dest, *prev;
90 int count;
91 u64 addr;
92
93 base = malloc(size + sizeof(*desc));
94 if (!base) {
95 debug("%s: Cannot allocate %#x bytes\n", __func__, size);
96 return NULL;
97 }
98 end = (struct efi_mem_desc *)((ulong)map + size);
99 count = ((ulong)end - (ulong)map->desc) / map->desc_size;
100 memcpy(base, map->desc, (ulong)end - (ulong)map->desc);
101 qsort(base, count, map->desc_size, h_cmp_entry);
102 prev = NULL;
103 addr = 0;
104 dest = base;
105 end = (struct efi_mem_desc *)((ulong)base + count * map->desc_size);
106 for (desc = base; desc < end; desc = efi_get_next_mem_desc(map, desc)) {
107 bool merge = true;
108 u32 type = desc->type;
109
110 if (type >= EFI_MAX_MEMORY_TYPE) {
111 printf("Memory map contains invalid entry type %u\n",
112 type);
113 continue;
114 }
115
116 if (skip_bs && is_boot_services(desc->type))
117 type = EFI_CONVENTIONAL_MEMORY;
118
119 memcpy(dest, desc, map->desc_size);
120 dest->type = type;
121 if (!skip_bs || !prev)
122 merge = false;
123 else if (desc->physical_start != addr)
124 merge = false;
125 else if (type != EFI_CONVENTIONAL_MEMORY)
126 merge = false;
127 else if (prev->type != EFI_CONVENTIONAL_MEMORY)
128 merge = false;
129
130 if (merge) {
131 prev->num_pages += desc->num_pages;
132 } else {
133 prev = dest;
134 dest = efi_get_next_mem_desc(map, dest);
135 }
136 addr = desc->physical_start + (desc->num_pages <<
137 EFI_PAGE_SHIFT);
138 }
139
140
141 dest->type = EFI_MAX_MEMORY_TYPE;
142
143 return base;
144}
145
146static void efi_print_mem_table(struct efi_entry_memmap *map,
147 struct efi_mem_desc *desc, bool skip_bs)
148{
149 u64 attr_seen[ATTR_SEEN_MAX];
150 int attr_seen_count;
151 int upto, i;
152 u64 addr;
153
154 printf(" # %-14s %10s %10s %10s %s\n", "Type", "Physical",
155 "Virtual", "Size", "Attributes");
156
157
158 attr_seen_count = 0;
159 addr = 0;
160 for (upto = 0; desc->type != EFI_MAX_MEMORY_TYPE;
161 upto++, desc = efi_get_next_mem_desc(map, desc)) {
162 const char *name;
163 u64 size;
164
165 if (skip_bs && is_boot_services(desc->type))
166 continue;
167 if (desc->physical_start != addr) {
168 printf(" %-14s %010llx %10s %010llx\n", "<gap>",
169 addr, "", desc->physical_start - addr);
170 }
171 size = desc->num_pages << EFI_PAGE_SHIFT;
172
173 name = desc->type < ARRAY_SIZE(type_name) ?
174 type_name[desc->type] : "<invalid>";
175 printf("%2d %x:%-12s %010llx %010llx %010llx ", upto,
176 desc->type, name, desc->physical_start,
177 desc->virtual_start, size);
178 if (desc->attribute & EFI_MEMORY_RUNTIME)
179 putc('r');
180 printf("%llx", desc->attribute & ~EFI_MEMORY_RUNTIME);
181 putc('\n');
182
183 for (i = 0; i < attr_seen_count; i++) {
184 if (attr_seen[i] == desc->attribute)
185 break;
186 }
187 if (i == attr_seen_count && i < ATTR_SEEN_MAX)
188 attr_seen[attr_seen_count++] = desc->attribute;
189 addr = desc->physical_start + size;
190 }
191
192 printf("\nAttributes key:\n");
193 for (i = 0; i < attr_seen_count; i++) {
194 u64 attr = attr_seen[i];
195 bool first;
196 int j;
197
198 printf("%c%llx: ", (attr & EFI_MEMORY_RUNTIME) ? 'r' : ' ',
199 attr & ~EFI_MEMORY_RUNTIME);
200 for (j = 0, first = true; j < ARRAY_SIZE(mem_attr); j++) {
201 if (attr & mem_attr[j].val) {
202 if (first)
203 first = false;
204 else
205 printf(", ");
206 printf("%s", mem_attr[j].name);
207 }
208 }
209 putc('\n');
210 }
211 if (skip_bs)
212 printf("*Some areas are merged (use 'all' to see)\n");
213}
214
215static int do_efi_mem(struct cmd_tbl *cmdtp, int flag, int argc,
216 char *const argv[])
217{
218 struct efi_mem_desc *desc;
219 struct efi_entry_memmap *map;
220 int size, ret;
221 bool skip_bs;
222
223 skip_bs = !argc || *argv[0] != 'a';
224 ret = efi_info_get(EFIET_MEMORY_MAP, (void **)&map, &size);
225 switch (ret) {
226 case -ENOENT:
227 printf("No EFI table available\n");
228 goto done;
229 case -EPROTONOSUPPORT:
230 printf("Incorrect EFI table version\n");
231 goto done;
232 }
233 printf("EFI table at %lx, memory map %p, size %x, version %x, descr. size %#x\n",
234 gd->arch.table, map, size, map->version, map->desc_size);
235 if (map->version != EFI_MEM_DESC_VERSION) {
236 printf("Incorrect memory map version\n");
237 ret = -EPROTONOSUPPORT;
238 goto done;
239 }
240
241 desc = efi_build_mem_table(map, size, skip_bs);
242 if (!desc) {
243 ret = -ENOMEM;
244 goto done;
245 }
246
247 efi_print_mem_table(map, desc, skip_bs);
248 free(desc);
249done:
250 if (ret)
251 printf("Error: %d\n", ret);
252
253 return ret ? CMD_RET_FAILURE : 0;
254}
255
256static struct cmd_tbl efi_commands[] = {
257 U_BOOT_CMD_MKENT(mem, 1, 1, do_efi_mem, "", ""),
258};
259
260static int do_efi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
261{
262 struct cmd_tbl *efi_cmd;
263 int ret;
264
265 if (argc < 2)
266 return CMD_RET_USAGE;
267 efi_cmd = find_cmd_tbl(argv[1], efi_commands, ARRAY_SIZE(efi_commands));
268 argc -= 2;
269 argv += 2;
270 if (!efi_cmd || argc > efi_cmd->maxargs)
271 return CMD_RET_USAGE;
272
273 ret = efi_cmd->cmd(efi_cmd, flag, argc, argv);
274
275 return cmd_process_error(efi_cmd, ret);
276}
277
278U_BOOT_CMD(
279 efi, 3, 1, do_efi,
280 "EFI access",
281 "mem [all] Dump memory information [include boot services]"
282);
283
