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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2003 Eric W. Biederman <ebiederm@xmission.com>
* Copyright (C) 2009 Ron Minnich <rminnich@gmail.com>
* Copyright (C) 2016 George Trudeau <george.trudeau@usherbrooke.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <commonlib/compression.h>
#include <commonlib/endian.h>
#include <console/console.h>
#include <cpu/cpu.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <symbols.h>
#include <cbfs.h>
#include <lib.h>
#include <bootmem.h>
#include <program_loading.h>
#include <timestamp.h>
#include <cbmem.h>
/* Decode a serialized cbfs payload segment
* from memory into native endianness.
*/
static void cbfs_decode_payload_segment(struct cbfs_payload_segment *segment,
const struct cbfs_payload_segment *src)
{
segment->type = read_be32(&src->type);
segment->compression = read_be32(&src->compression);
segment->offset = read_be32(&src->offset);
segment->load_addr = read_be64(&src->load_addr);
segment->len = read_be32(&src->len);
segment->mem_len = read_be32(&src->mem_len);
}
static int segment_targets_usable_ram(void *dest, unsigned long memsz)
{
uintptr_t d = (uintptr_t) dest;
if (bootmem_region_targets_usable_ram(d, memsz))
return 1;
if (payload_arch_usable_ram_quirk(d, memsz))
return 1;
printk(BIOS_ERR, "SELF segment doesn't target RAM: 0x%p, %lu bytes\n", dest, memsz);
bootmem_dump_ranges();
return 0;
}
static int load_one_segment(uint8_t *dest,
uint8_t *src,
size_t len,
size_t memsz,
uint32_t compression,
int flags)
{
unsigned char *middle, *end;
printk(BIOS_DEBUG, "Loading Segment: addr: 0x%p memsz: 0x%016zx filesz: 0x%016zx\n",
dest, memsz, len);
/* Compute the boundaries of the segment */
end = dest + memsz;
/* Copy data from the initial buffer */
switch (compression) {
case CBFS_COMPRESS_LZMA: {
printk(BIOS_DEBUG, "using LZMA\n");
timestamp_add_now(TS_START_ULZMA);
len = ulzman(src, len, dest, memsz);
timestamp_add_now(TS_END_ULZMA);
if (!len) /* Decompression Error. */
return 0;
break;
}
case CBFS_COMPRESS_LZ4: {
printk(BIOS_DEBUG, "using LZ4\n");
timestamp_add_now(TS_START_ULZ4F);
len = ulz4fn(src, len, dest, memsz);
timestamp_add_now(TS_END_ULZ4F);
if (!len) /* Decompression Error. */
return 0;
break;
}
case CBFS_COMPRESS_NONE: {
printk(BIOS_DEBUG, "it's not compressed!\n");
memcpy(dest, src, len);
break;
}
default:
printk(BIOS_INFO, "CBFS: Unknown compression type %d\n", compression);
return 0;
}
/* Calculate middle after any changes to len. */
middle = dest + len;
printk(BIOS_SPEW, "[ 0x%08lx, %08lx, 0x%08lx) <- %08lx\n",
(unsigned long)dest,
(unsigned long)middle,
(unsigned long)end,
(unsigned long)src);
/* Zero the extra bytes between middle & end */
if (middle < end) {
printk(BIOS_DEBUG,
"Clearing Segment: addr: 0x%016lx memsz: 0x%016lx\n",
(unsigned long)middle,
(unsigned long)(end - middle));
/* Zero the extra bytes */
memset(middle, 0, end - middle);
}
/*
* Each architecture can perform additional operations
* on the loaded segment
*/
prog_segment_loaded((uintptr_t)dest, memsz, flags);
return 1;
}
/* Note: this function is a bit dangerous so is not exported.
* It assumes you're smart enough not to call it with the very
* last segment, since it uses seg + 1 */
static int last_loadable_segment(struct cbfs_payload_segment *seg)
{
return read_be32(&(seg + 1)->type) == PAYLOAD_SEGMENT_ENTRY;
}
static int load_payload_segments(
struct cbfs_payload_segment *cbfssegs,
int check_regions,
uintptr_t *entry)
{
uint8_t *dest, *src;
size_t filesz, memsz;
uint32_t compression;
struct cbfs_payload_segment *first_segment, *seg, segment;
int flags = 0;
for (first_segment = seg = cbfssegs;; ++seg) {
printk(BIOS_DEBUG, "Loading segment from ROM address 0x%p\n", seg);
cbfs_decode_payload_segment(&segment, seg);
dest = (uint8_t *)(uintptr_t)segment.load_addr;
memsz = segment.mem_len;
compression = segment.compression;
filesz = segment.len;
switch (segment.type) {
case PAYLOAD_SEGMENT_CODE:
case PAYLOAD_SEGMENT_DATA:
printk(BIOS_DEBUG, " %s (compression=%x)\n",
segment.type == PAYLOAD_SEGMENT_CODE
? "code" : "data", segment.compression);
src = ((uint8_t *)first_segment) + segment.offset;
printk(BIOS_DEBUG,
" New segment dstaddr 0x%p memsize 0x%zx srcaddr 0x%p filesize 0x%zx\n",
dest, memsz, src, filesz);
/* Clean up the values */
if (filesz > memsz) {
filesz = memsz;
printk(BIOS_DEBUG, " cleaned up filesize 0x%zx\n", filesz);
}
break;
case PAYLOAD_SEGMENT_BSS:
printk(BIOS_DEBUG, " BSS 0x%p (%d byte)\n", (void *)
(intptr_t)segment.load_addr, segment.mem_len);
filesz = 0;
src = ((uint8_t *)first_segment) + segment.offset;
compression = CBFS_COMPRESS_NONE;
break;
case PAYLOAD_SEGMENT_ENTRY:
printk(BIOS_DEBUG, " Entry Point 0x%p\n", (void *)
(intptr_t)segment.load_addr);
*entry = segment.load_addr;
/* Per definition, a payload always has the entry point
* as last segment. Thus, we use the occurrence of the
* entry point as break condition for the loop.
*/
return 0;
default:
/* We found something that we don't know about. Throw
* hands into the sky and run away!
*/
printk(BIOS_EMERG, "Bad segment type %x\n", segment.type);
return -1;
}
if (check_regions && !segment_targets_usable_ram(dest, memsz))
return -1;
/* Note that the 'seg + 1' is safe as we only call this
* function on "not the last" * items, since entry
* is always last. */
if (last_loadable_segment(seg))
flags = SEG_FINAL;
if (!load_one_segment(dest, src, filesz, memsz, compression, flags))
return -1;
}
return 1;
}
__weak int payload_arch_usable_ram_quirk(uint64_t start, uint64_t size)
{
return 0;
}
bool selfload(struct prog *payload, bool check_regions)
{
uintptr_t entry = 0;
struct cbfs_payload_segment *cbfssegs;
void *data;
data = rdev_mmap_full(prog_rdev(payload));
if (data == NULL)
return false;
cbfssegs = &((struct cbfs_payload *)data)->segments;
if (load_payload_segments(cbfssegs, check_regions, &entry))
goto out;
printk(BIOS_SPEW, "Loaded segments\n");
rdev_munmap(prog_rdev(payload), data);
/* Pass cbtables to payload if architecture desires it. */
prog_set_entry(payload, (void *)entry, cbmem_find(CBMEM_ID_CBTABLE));
return true;
out:
rdev_munmap(prog_rdev(payload), data);
return false;
}
|
