1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
12 #include <u-boot/crc.h>
15 * A bloblist is a single contiguous chunk of memory with a header
16 * (struct bloblist_hdr) and a number of blobs in it.
18 * Each blob starts on a BLOBLIST_ALIGN boundary relative to the start of the
19 * bloblist and consists of a struct bloblist_rec, some padding to the required
20 * alignment for the blog and then the actual data. The padding ensures that the
21 * start address of the data in each blob is aligned as required. Note that
22 * each blob's *data* is aligned to BLOBLIST_ALIGN regardless of the alignment
23 * of the bloblist itself or the blob header.
25 * So far, only BLOBLIST_ALIGN alignment is supported.
28 DECLARE_GLOBAL_DATA_PTR;
30 static const char *const tag_name[] = {
31 [BLOBLISTT_NONE] = "(none)",
32 [BLOBLISTT_EC_HOSTEVENT] = "EC host event",
33 [BLOBLISTT_SPL_HANDOFF] = "SPL hand-off",
34 [BLOBLISTT_VBOOT_CTX] = "Chrome OS vboot context",
35 [BLOBLISTT_VBOOT_HANDOFF] = "Chrome OS vboot hand-off",
36 [BLOBLISTT_ACPI_GNVS] = "ACPI GNVS",
37 [BLOBLISTT_INTEL_VBT] = "Intel Video-BIOS table",
38 [BLOBLISTT_TPM2_TCG_LOG] = "TPM v2 log space",
39 [BLOBLISTT_TCPA_LOG] = "TPM log space",
40 [BLOBLISTT_ACPI_TABLES] = "ACPI tables for x86",
41 [BLOBLISTT_SMBIOS_TABLES] = "SMBIOS tables for x86",
44 const char *bloblist_tag_name(enum bloblist_tag_t tag)
46 if (tag < 0 || tag >= BLOBLISTT_COUNT)
52 static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
54 if (hdr->alloced <= hdr->hdr_size)
56 return (struct bloblist_rec *)((void *)hdr + hdr->hdr_size);
59 static struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
60 struct bloblist_rec *rec)
64 offset = (void *)rec - (void *)hdr;
65 offset += rec->hdr_size + ALIGN(rec->size, BLOBLIST_ALIGN);
66 if (offset >= hdr->alloced)
68 return (struct bloblist_rec *)((void *)hdr + offset);
71 #define foreach_rec(_rec, _hdr) \
72 for (_rec = bloblist_first_blob(_hdr); \
74 _rec = bloblist_next_blob(_hdr, _rec))
76 static struct bloblist_rec *bloblist_findrec(uint tag)
78 struct bloblist_hdr *hdr = gd->bloblist;
79 struct bloblist_rec *rec;
84 foreach_rec(rec, hdr) {
92 static int bloblist_addrec(uint tag, int size, int align,
93 struct bloblist_rec **recp)
95 struct bloblist_hdr *hdr = gd->bloblist;
96 struct bloblist_rec *rec;
97 int data_start, new_alloced;
100 align = BLOBLIST_ALIGN;
102 /* Figure out where the new data will start */
103 data_start = map_to_sysmem(hdr) + hdr->alloced + sizeof(*rec);
105 /* Align the address and then calculate the offset from ->alloced */
106 data_start = ALIGN(data_start, align) - map_to_sysmem(hdr);
108 /* Calculate the new allocated total */
109 new_alloced = data_start + ALIGN(size, align);
111 if (new_alloced >= hdr->size) {
112 log(LOGC_BLOBLIST, LOGL_ERR,
113 "Failed to allocate %x bytes size=%x, need size=%x\n",
114 size, hdr->size, new_alloced);
115 return log_msg_ret("bloblist add", -ENOSPC);
117 rec = (void *)hdr + hdr->alloced;
120 rec->hdr_size = data_start - hdr->alloced;
124 /* Zero the record data */
125 memset((void *)rec + rec->hdr_size, '\0', rec->size);
127 hdr->alloced = new_alloced;
133 static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size,
136 struct bloblist_rec *rec;
138 rec = bloblist_findrec(tag);
140 if (size && size != rec->size) {
147 ret = bloblist_addrec(tag, size, align, &rec);
156 void *bloblist_find(uint tag, int size)
158 struct bloblist_rec *rec;
160 rec = bloblist_findrec(tag);
163 if (size && size != rec->size)
166 return (void *)rec + rec->hdr_size;
169 void *bloblist_add(uint tag, int size, int align)
171 struct bloblist_rec *rec;
173 if (bloblist_addrec(tag, size, align, &rec))
176 return (void *)rec + rec->hdr_size;
179 int bloblist_ensure_size(uint tag, int size, int align, void **blobp)
181 struct bloblist_rec *rec;
184 ret = bloblist_ensurerec(tag, &rec, size, align);
187 *blobp = (void *)rec + rec->hdr_size;
192 void *bloblist_ensure(uint tag, int size)
194 struct bloblist_rec *rec;
196 if (bloblist_ensurerec(tag, &rec, size, 0))
199 return (void *)rec + rec->hdr_size;
202 int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp)
204 struct bloblist_rec *rec;
207 ret = bloblist_ensurerec(tag, &rec, *sizep, 0);
212 *blobp = (void *)rec + rec->hdr_size;
217 static u32 bloblist_calc_chksum(struct bloblist_hdr *hdr)
219 struct bloblist_rec *rec;
222 chksum = crc32(0, (unsigned char *)hdr,
223 offsetof(struct bloblist_hdr, chksum));
224 foreach_rec(rec, hdr) {
225 chksum = crc32(chksum, (void *)rec, rec->hdr_size);
226 chksum = crc32(chksum, (void *)rec + rec->hdr_size, rec->size);
232 int bloblist_new(ulong addr, uint size, uint flags)
234 struct bloblist_hdr *hdr;
236 if (size < sizeof(*hdr))
237 return log_ret(-ENOSPC);
238 if (addr & (BLOBLIST_ALIGN - 1))
239 return log_ret(-EFAULT);
240 hdr = map_sysmem(addr, size);
241 memset(hdr, '\0', sizeof(*hdr));
242 hdr->version = BLOBLIST_VERSION;
243 hdr->hdr_size = sizeof(*hdr);
245 hdr->magic = BLOBLIST_MAGIC;
247 hdr->alloced = hdr->hdr_size;
254 int bloblist_check(ulong addr, uint size)
256 struct bloblist_hdr *hdr;
259 hdr = map_sysmem(addr, sizeof(*hdr));
260 if (hdr->magic != BLOBLIST_MAGIC)
261 return log_msg_ret("Bad magic", -ENOENT);
262 if (hdr->version != BLOBLIST_VERSION)
263 return log_msg_ret("Bad version", -EPROTONOSUPPORT);
264 if (size && hdr->size != size)
265 return log_msg_ret("Bad size", -EFBIG);
266 chksum = bloblist_calc_chksum(hdr);
267 if (hdr->chksum != chksum) {
268 log(LOGC_BLOBLIST, LOGL_ERR, "Checksum %x != %x\n", hdr->chksum,
270 return log_msg_ret("Bad checksum", -EIO);
277 int bloblist_finish(void)
279 struct bloblist_hdr *hdr = gd->bloblist;
281 hdr->chksum = bloblist_calc_chksum(hdr);
286 void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp)
288 struct bloblist_hdr *hdr = gd->bloblist;
290 *basep = map_to_sysmem(gd->bloblist);
292 *allocedp = hdr->alloced;
295 static void show_value(const char *prompt, ulong value)
297 printf("%s:%*s %-5lx ", prompt, 8 - (int)strlen(prompt), "", value);
298 print_size(value, "\n");
301 void bloblist_show_stats(void)
303 ulong base, size, alloced;
305 bloblist_get_stats(&base, &size, &alloced);
306 printf("base: %lx\n", base);
307 show_value("size", size);
308 show_value("alloced", alloced);
309 show_value("free", size - alloced);
312 void bloblist_show_list(void)
314 struct bloblist_hdr *hdr = gd->bloblist;
315 struct bloblist_rec *rec;
317 printf("%-8s %8s Tag Name\n", "Address", "Size");
318 for (rec = bloblist_first_blob(hdr); rec;
319 rec = bloblist_next_blob(hdr, rec)) {
320 printf("%08lx %8x %3d %s\n",
321 (ulong)map_to_sysmem((void *)rec + rec->hdr_size),
322 rec->size, rec->tag, bloblist_tag_name(rec->tag));
326 void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
328 struct bloblist_hdr *hdr;
330 memcpy(to, from, from_size);
335 int bloblist_init(void)
341 * Wed expect to find an existing bloblist in the first phase of U-Boot
344 expected = !u_boot_first_phase();
345 if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
348 ret = bloblist_check(CONFIG_BLOBLIST_ADDR,
349 CONFIG_BLOBLIST_SIZE);
351 log(LOGC_BLOBLIST, expected ? LOGL_WARNING : LOGL_DEBUG,
352 "Existing bloblist not found: creating new bloblist\n");
353 ret = bloblist_new(CONFIG_BLOBLIST_ADDR, CONFIG_BLOBLIST_SIZE,
356 log(LOGC_BLOBLIST, LOGL_DEBUG, "Found existing bloblist\n");