summaryrefslogtreecommitdiff
path: root/src/drivers/intel/fsp2_0/util.c
blob: a00b68462416071e4013065b44593982491584d5 (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
/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <device/mmio.h>
#include <cbfs.h>
#include <cf9_reset.h>
#include <commonlib/bsd/compression.h>
#include <commonlib/fsp.h>
#include <console/console.h>
#include <fsp/util.h>
#include <lib.h>
#include <string.h>
#include <types.h>

static bool looks_like_fsp_header(const uint8_t *raw_hdr)
{
	if (memcmp(raw_hdr, FSP_HDR_SIGNATURE, 4)) {
		printk(BIOS_ALERT, "Did not find a valid FSP signature\n");
		return false;
	}

	if (read32(raw_hdr + 4) != FSP_HDR_LEN) {
		printk(BIOS_ALERT, "FSP header has invalid length\n");
		return false;
	}

	return true;
}

enum cb_err fsp_identify(struct fsp_header *hdr, const void *fsp_blob)
{
	const uint8_t *raw_hdr = fsp_blob;

	if (!looks_like_fsp_header(raw_hdr))
		return CB_ERR;

	hdr->spec_version = read8(raw_hdr + 10);
	hdr->revision = read8(raw_hdr + 11);
	hdr->fsp_revision = read32(raw_hdr + 12);
	memcpy(hdr->image_id, raw_hdr + 16, ARRAY_SIZE(hdr->image_id));
	hdr->image_id[ARRAY_SIZE(hdr->image_id) - 1] = '\0';
	hdr->image_size = read32(raw_hdr + 24);
	hdr->image_base = read32(raw_hdr + 28);
	hdr->image_attribute = read16(raw_hdr + 32);
	hdr->component_attribute = read16(raw_hdr + 34);
	hdr->cfg_region_offset = read32(raw_hdr + 36);
	hdr->cfg_region_size = read32(raw_hdr + 40);
	hdr->temp_ram_init_entry = read32(raw_hdr + 48);
	hdr->temp_ram_exit_entry = read32(raw_hdr + 64);
	hdr->notify_phase_entry_offset = read32(raw_hdr + 56);
	hdr->memory_init_entry_offset = read32(raw_hdr + 60);
	hdr->silicon_init_entry_offset = read32(raw_hdr + 68);

	return CB_SUCCESS;
}

enum cb_err fsp_validate_component(struct fsp_header *hdr,
					const struct region_device *rdev)
{
	void *membase;

	/* Map just enough of the file to be able to parse the header. */
	membase = rdev_mmap(rdev, FSP_HDR_OFFSET, FSP_HDR_LEN);

	if (membase == NULL) {
		printk(BIOS_CRIT, "Could not mmap() FSP header.\n");
		return CB_ERR;
	}

	if (fsp_identify(hdr, membase) != CB_SUCCESS) {
		rdev_munmap(rdev, membase);
		printk(BIOS_CRIT, "No valid FSP header\n");
		return CB_ERR;
	}

	rdev_munmap(rdev, membase);

	if (CONFIG(DISPLAY_FSP_HEADER))
		fsp_print_header_info(hdr);

	/* Check if size specified in the header matches the cbfs file size */
	if (region_device_sz(rdev) < hdr->image_size) {
		printk(BIOS_CRIT, "Component size bigger than cbfs file.\n");
		return CB_ERR;
	}

	return CB_SUCCESS;
}

static bool fsp_reset_requested(uint32_t status)
{
	return (status >= FSP_STATUS_RESET_REQUIRED_COLD &&
		status <= FSP_STATUS_RESET_REQUIRED_8);
}

void fsp_handle_reset(uint32_t status)
{
	if (!fsp_reset_requested(status))
		return;

	printk(BIOS_SPEW, "FSP: handling reset type %x\n", status);

	switch (status) {
	case FSP_STATUS_RESET_REQUIRED_COLD:
		full_reset();
		break;
	case FSP_STATUS_RESET_REQUIRED_WARM:
		system_reset();
		break;
	case FSP_STATUS_RESET_REQUIRED_3:
	case FSP_STATUS_RESET_REQUIRED_4:
	case FSP_STATUS_RESET_REQUIRED_5:
	case FSP_STATUS_RESET_REQUIRED_6:
	case FSP_STATUS_RESET_REQUIRED_7:
	case FSP_STATUS_RESET_REQUIRED_8:
		chipset_handle_reset(status);
		break;
	default:
		break;
	}
}

static inline bool fspm_env(void)
{
	if (ENV_ROMSTAGE)
		return true;
	return false;
}

static inline bool fspm_xip(void)
{
	/* FSP-M is assumed to be loaded in romstage. */
	if (fspm_env() && CONFIG(FSP_M_XIP))
		return true;
	return false;
}

static void *fsp_get_dest_and_load(struct fsp_load_descriptor *fspld, size_t size,
				const struct region_device *source_rdev,
				uint32_t compression_algo)
{
	void *dest;

	if (fspld->get_destination(fspld, &dest, size, source_rdev) < 0) {
		printk(BIOS_ERR, "FSP Destination not obtained.\n");
		return NULL;
	}

	/* Don't load when executing in place. */
	if (fspm_xip())
		return dest;

	if (cbfs_load_and_decompress(source_rdev, 0, region_device_sz(source_rdev),
			dest, size, compression_algo) != size) {
		printk(BIOS_ERR, "Failed to load FSP component.\n");
		return NULL;
	}

	/* Don't allow FSP-M relocation. */
	if (fspm_env())
		return dest;

	if (fsp_component_relocate((uintptr_t)dest, dest, size) < 0) {
		printk(BIOS_ERR, "Unable to relocate FSP component!\n");
		return NULL;
	}

	return dest;
}

/* Load the FSP component described by fsp_load_descriptor from cbfs. The FSP
 * header object will be validated and filled in on successful load. */
enum cb_err fsp_load_component(struct fsp_load_descriptor *fspld, struct fsp_header *hdr)
{
	struct cbfsf file_desc;
	uint32_t compression_algo;
	size_t output_size;
	void *dest;
	struct region_device source_rdev;
	struct prog *fsp_prog = &fspld->fsp_prog;

	if (fspld->get_destination == NULL)
		return CB_ERR;

	if (cbfs_boot_locate(&file_desc, prog_name(fsp_prog), &fsp_prog->cbfs_type) < 0)
		return CB_ERR;

	if (cbfsf_decompression_info(&file_desc, &compression_algo, &output_size) < 0)
		return CB_ERR;

	cbfs_file_data(&source_rdev, &file_desc);

	dest = fsp_get_dest_and_load(fspld, output_size, &source_rdev, compression_algo);

	if (dest == NULL)
		return CB_ERR;

	prog_set_area(fsp_prog, dest, output_size);

	if (fsp_validate_component(hdr, prog_rdev(fsp_prog)) != CB_SUCCESS) {
		printk(BIOS_ERR, "Invalid FSP header after load!\n");
		return CB_ERR;
	}

	/* Signal that FSP component has been loaded. */
	prog_segment_loaded(hdr->image_base, hdr->image_size, SEG_FINAL);

	return CB_SUCCESS;
}