Patrick Georgi | ac95903 | 2020-05-05 22:49:26 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 2 | |
Johnny Lin | b8899ef | 2020-05-28 14:04:58 +0800 | [diff] [blame] | 3 | #include <boot/coreboot_tables.h> |
Kyösti Mälkki | 13f6650 | 2019-03-03 08:01:05 +0200 | [diff] [blame] | 4 | #include <device/mmio.h> |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 5 | #include <cbfs.h> |
Patrick Rudolph | f677d17 | 2018-10-01 19:17:11 +0200 | [diff] [blame] | 6 | #include <cf9_reset.h> |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 7 | #include <commonlib/bsd/compression.h> |
| 8 | #include <commonlib/fsp.h> |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 9 | #include <console/console.h> |
| 10 | #include <fsp/util.h> |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 11 | #include <string.h> |
Elyes HAOUAS | bd1683d | 2019-05-15 21:05:37 +0200 | [diff] [blame] | 12 | #include <types.h> |
Nikolai Vyssotski | 3c3d2cf | 2021-07-09 18:36:27 -0500 | [diff] [blame] | 13 | #include <assert.h> |
| 14 | |
| 15 | static uint32_t fsp_hdr_get_expected_min_length(void) |
| 16 | { |
Anil Kumar | 57309d3 | 2021-11-11 18:56:21 -0800 | [diff] [blame] | 17 | if (CONFIG(PLATFORM_USES_FSP2_3)) |
| 18 | return 80; |
| 19 | else if (CONFIG(PLATFORM_USES_FSP2_2)) |
Nikolai Vyssotski | 3c3d2cf | 2021-07-09 18:36:27 -0500 | [diff] [blame] | 20 | return 76; |
| 21 | else if (CONFIG(PLATFORM_USES_FSP2_1)) |
| 22 | return 72; |
| 23 | else if (CONFIG(PLATFORM_USES_FSP2_0)) |
| 24 | return 72; |
| 25 | else |
| 26 | return dead_code_t(uint32_t); |
| 27 | } |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 28 | |
Julian Schroeder | 8a576f6 | 2021-11-02 16:32:28 -0500 | [diff] [blame] | 29 | static bool looks_like_fsp_header(struct fsp_header *hdr) |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 30 | { |
Julian Schroeder | 8a576f6 | 2021-11-02 16:32:28 -0500 | [diff] [blame] | 31 | if (memcmp(&hdr->signature, FSP_HDR_SIGNATURE, 4)) { |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 32 | printk(BIOS_ALERT, "Did not find a valid FSP signature\n"); |
| 33 | return false; |
| 34 | } |
| 35 | |
Sean Rhodes | 38c99b5 | 2022-07-13 10:11:44 +0100 | [diff] [blame] | 36 | /* It is possible to build FSP with any version of edk2 which could have introduced new |
Nikolai Vyssotski | 3c3d2cf | 2021-07-09 18:36:27 -0500 | [diff] [blame] | 37 | fields in FSP_INFO_HEADER. The new fields will be ignored based on the reported FSP |
| 38 | version. This check ensures that the reported header length is at least what the |
| 39 | reported FSP version requires so that we do not access any out-of-bound bytes. */ |
Julian Schroeder | 8a576f6 | 2021-11-02 16:32:28 -0500 | [diff] [blame] | 40 | if (hdr->header_length < fsp_hdr_get_expected_min_length()) { |
| 41 | printk(BIOS_ALERT, "FSP header has invalid length: %d\n", hdr->header_length); |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 42 | return false; |
| 43 | } |
| 44 | |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | enum cb_err fsp_identify(struct fsp_header *hdr, const void *fsp_blob) |
| 49 | { |
Julian Schroeder | 8a576f6 | 2021-11-02 16:32:28 -0500 | [diff] [blame] | 50 | memcpy(hdr, fsp_blob, sizeof(struct fsp_header)); |
| 51 | if (!looks_like_fsp_header(hdr)) |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 52 | return CB_ERR; |
| 53 | |
Andrey Petrov | 9738970 | 2016-02-25 14:15:37 -0800 | [diff] [blame] | 54 | return CB_SUCCESS; |
| 55 | } |
| 56 | |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 57 | enum cb_err fsp_validate_component(struct fsp_header *hdr, void *fsp_file, size_t file_size) |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 58 | { |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 59 | void *raw_hdr = fsp_file + FSP_HDR_OFFSET; |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 60 | |
Nikolai Vyssotski | 3c3d2cf | 2021-07-09 18:36:27 -0500 | [diff] [blame] | 61 | if (file_size < FSP_HDR_OFFSET + fsp_hdr_get_expected_min_length()) { |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 62 | printk(BIOS_CRIT, "FSP blob too small.\n"); |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 63 | return CB_ERR; |
| 64 | } |
| 65 | |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 66 | if (fsp_identify(hdr, raw_hdr) != CB_SUCCESS) { |
Lee Leahy | b20d4ba | 2016-07-31 16:49:28 -0700 | [diff] [blame] | 67 | printk(BIOS_CRIT, "No valid FSP header\n"); |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 68 | return CB_ERR; |
| 69 | } |
| 70 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 71 | if (CONFIG(DISPLAY_FSP_HEADER)) |
Lee Leahy | 37b5ef2 | 2016-07-31 14:15:49 -0700 | [diff] [blame] | 72 | fsp_print_header_info(hdr); |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 73 | |
| 74 | /* Check if size specified in the header matches the cbfs file size */ |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 75 | if (file_size < hdr->image_size) { |
Lee Leahy | b20d4ba | 2016-07-31 16:49:28 -0700 | [diff] [blame] | 76 | printk(BIOS_CRIT, "Component size bigger than cbfs file.\n"); |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 77 | return CB_ERR; |
| 78 | } |
| 79 | |
Kyösti Mälkki | 11cac78 | 2022-04-07 07:16:48 +0300 | [diff] [blame] | 80 | if (ENV_RAMINIT) |
Felix Held | 42df9af | 2021-08-24 19:26:56 +0200 | [diff] [blame] | 81 | soc_validate_fspm_header(hdr); |
Johnny Lin | 5b47d77 | 2020-11-13 17:21:25 +0800 | [diff] [blame] | 82 | |
Aaron Durbin | a413e5e | 2016-07-17 23:06:03 -0500 | [diff] [blame] | 83 | return CB_SUCCESS; |
| 84 | } |
| 85 | |
Brandon Breitenstein | c31ba0e | 2016-07-27 17:34:45 -0700 | [diff] [blame] | 86 | static bool fsp_reset_requested(uint32_t status) |
Andrey Petrov | 3a94a3b | 2016-07-18 00:15:41 -0700 | [diff] [blame] | 87 | { |
| 88 | return (status >= FSP_STATUS_RESET_REQUIRED_COLD && |
| 89 | status <= FSP_STATUS_RESET_REQUIRED_8); |
| 90 | } |
| 91 | |
Brandon Breitenstein | c31ba0e | 2016-07-27 17:34:45 -0700 | [diff] [blame] | 92 | void fsp_handle_reset(uint32_t status) |
Andrey Petrov | 901e43c | 2016-06-22 19:22:30 -0700 | [diff] [blame] | 93 | { |
Andrey Petrov | 3a94a3b | 2016-07-18 00:15:41 -0700 | [diff] [blame] | 94 | if (!fsp_reset_requested(status)) |
| 95 | return; |
| 96 | |
Lee Leahy | b20d4ba | 2016-07-31 16:49:28 -0700 | [diff] [blame] | 97 | printk(BIOS_SPEW, "FSP: handling reset type %x\n", status); |
Andrey Petrov | 3a94a3b | 2016-07-18 00:15:41 -0700 | [diff] [blame] | 98 | |
Lee Leahy | b2b97a5 | 2017-03-10 08:40:18 -0800 | [diff] [blame] | 99 | switch (status) { |
Andrey Petrov | 901e43c | 2016-06-22 19:22:30 -0700 | [diff] [blame] | 100 | case FSP_STATUS_RESET_REQUIRED_COLD: |
Patrick Rudolph | f677d17 | 2018-10-01 19:17:11 +0200 | [diff] [blame] | 101 | full_reset(); |
Andrey Petrov | 901e43c | 2016-06-22 19:22:30 -0700 | [diff] [blame] | 102 | break; |
| 103 | case FSP_STATUS_RESET_REQUIRED_WARM: |
Patrick Rudolph | f677d17 | 2018-10-01 19:17:11 +0200 | [diff] [blame] | 104 | system_reset(); |
Andrey Petrov | 901e43c | 2016-06-22 19:22:30 -0700 | [diff] [blame] | 105 | break; |
Andrey Petrov | 3a94a3b | 2016-07-18 00:15:41 -0700 | [diff] [blame] | 106 | case FSP_STATUS_RESET_REQUIRED_3: |
| 107 | case FSP_STATUS_RESET_REQUIRED_4: |
| 108 | case FSP_STATUS_RESET_REQUIRED_5: |
| 109 | case FSP_STATUS_RESET_REQUIRED_6: |
| 110 | case FSP_STATUS_RESET_REQUIRED_7: |
| 111 | case FSP_STATUS_RESET_REQUIRED_8: |
| 112 | chipset_handle_reset(status); |
Andrey Petrov | 901e43c | 2016-06-22 19:22:30 -0700 | [diff] [blame] | 113 | break; |
| 114 | default: |
| 115 | break; |
| 116 | } |
| 117 | } |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 118 | |
Aaron Durbin | ecbfa99 | 2020-05-15 17:01:58 -0600 | [diff] [blame] | 119 | static inline bool fspm_env(void) |
| 120 | { |
Kyösti Mälkki | 11cac78 | 2022-04-07 07:16:48 +0300 | [diff] [blame] | 121 | if (ENV_RAMINIT) |
Aaron Durbin | ecbfa99 | 2020-05-15 17:01:58 -0600 | [diff] [blame] | 122 | return true; |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | static inline bool fspm_xip(void) |
| 127 | { |
| 128 | /* FSP-M is assumed to be loaded in romstage. */ |
| 129 | if (fspm_env() && CONFIG(FSP_M_XIP)) |
| 130 | return true; |
| 131 | return false; |
| 132 | } |
| 133 | |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 134 | /* Load the FSP component described by fsp_load_descriptor from cbfs. The FSP |
| 135 | * header object will be validated and filled in on successful load. */ |
| 136 | enum cb_err fsp_load_component(struct fsp_load_descriptor *fspld, struct fsp_header *hdr) |
| 137 | { |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 138 | size_t output_size; |
| 139 | void *dest; |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 140 | struct prog *fsp_prog = &fspld->fsp_prog; |
| 141 | |
Julius Werner | 8205ce6 | 2021-03-10 17:25:01 -0800 | [diff] [blame] | 142 | dest = cbfs_alloc(prog_name(fsp_prog), fspld->alloc, fspld, &output_size); |
| 143 | if (!dest) |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 144 | return CB_ERR; |
| 145 | |
Raul E Rangel | 4911dc7 | 2021-11-05 10:29:24 -0600 | [diff] [blame] | 146 | /* Don't allow FSP-M relocation when XIP. */ |
| 147 | if (!fspm_xip() && fsp_component_relocate((uintptr_t)dest, dest, output_size) < 0) { |
Julius Werner | 8205ce6 | 2021-03-10 17:25:01 -0800 | [diff] [blame] | 148 | printk(BIOS_ERR, "Unable to relocate FSP component!\n"); |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 149 | return CB_ERR; |
Julius Werner | 8205ce6 | 2021-03-10 17:25:01 -0800 | [diff] [blame] | 150 | } |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 151 | |
| 152 | prog_set_area(fsp_prog, dest, output_size); |
| 153 | |
Julius Werner | 43c9d70 | 2021-04-12 17:00:16 -0700 | [diff] [blame] | 154 | if (fsp_validate_component(hdr, dest, output_size) != CB_SUCCESS) { |
Aaron Durbin | a85febc | 2020-05-15 15:09:10 -0600 | [diff] [blame] | 155 | printk(BIOS_ERR, "Invalid FSP header after load!\n"); |
| 156 | return CB_ERR; |
| 157 | } |
| 158 | |
| 159 | /* Signal that FSP component has been loaded. */ |
| 160 | prog_segment_loaded(hdr->image_base, hdr->image_size, SEG_FINAL); |
| 161 | |
| 162 | return CB_SUCCESS; |
| 163 | } |
Johnny Lin | b8899ef | 2020-05-28 14:04:58 +0800 | [diff] [blame] | 164 | |
| 165 | /* Only call this function when FSP header has been read and validated */ |
| 166 | void fsp_get_version(char *buf) |
| 167 | { |
| 168 | struct fsp_header *hdr = &fsps_hdr; |
Johnny Lin | 5b47d77 | 2020-11-13 17:21:25 +0800 | [diff] [blame] | 169 | union fsp_revision revision; |
Johnny Lin | b8899ef | 2020-05-28 14:04:58 +0800 | [diff] [blame] | 170 | |
Julian Schroeder | 8a576f6 | 2021-11-02 16:32:28 -0500 | [diff] [blame] | 171 | revision.val = hdr->image_revision; |
Johnny Lin | b8899ef | 2020-05-28 14:04:58 +0800 | [diff] [blame] | 172 | snprintf(buf, FSP_VER_LEN, "%u.%u-%u.%u.%u.%u", (hdr->spec_version >> 4), |
| 173 | hdr->spec_version & 0xf, revision.rev.major, |
| 174 | revision.rev.minor, revision.rev.revision, revision.rev.bld_num); |
| 175 | } |
| 176 | |
Felix Held | 8899598 | 2021-01-28 22:43:52 +0100 | [diff] [blame] | 177 | /* Check if the signature in the UPD header matches the expected one. If it doesn't match, the |
| 178 | FSP binaries in CBFS are for a different platform than the platform code trying to use it |
| 179 | in which case the function calls die(). */ |
| 180 | void fsp_verify_upd_header_signature(uint64_t upd_signature, uint64_t expected_signature) |
| 181 | { |
| 182 | if (upd_signature != expected_signature) { |
| 183 | /* The UPD signatures are non-zero-terminated ASCII stored as a little endian |
| 184 | uint64_t, so this needs some casts. */ |
| 185 | die_with_post_code(POST_INVALID_VENDOR_BINARY, |
| 186 | "Invalid UPD signature! FSP provided \"%8s\", expected was \"%8s\".\n", |
| 187 | (char *)&upd_signature, |
| 188 | (char *)&expected_signature); |
| 189 | } |
| 190 | } |
| 191 | |
Johnny Lin | b8899ef | 2020-05-28 14:04:58 +0800 | [diff] [blame] | 192 | /* Add FSP version to coreboot table LB_TAG_PLATFORM_BLOB_VERSION */ |
| 193 | void lb_string_platform_blob_version(struct lb_header *header) |
| 194 | { |
| 195 | struct lb_string *rec; |
| 196 | size_t len; |
| 197 | char fsp_version[FSP_VER_LEN] = {0}; |
| 198 | |
| 199 | fsp_get_version(fsp_version); |
| 200 | rec = (struct lb_string *)lb_new_record(header); |
| 201 | rec->tag = LB_TAG_PLATFORM_BLOB_VERSION; |
| 202 | len = strlen(fsp_version); |
| 203 | rec->size = ALIGN_UP(sizeof(*rec) + len + 1, 8); |
| 204 | memcpy(rec->string, fsp_version, len+1); |
| 205 | } |
Johnny Lin | 5b47d77 | 2020-11-13 17:21:25 +0800 | [diff] [blame] | 206 | |
Felix Held | 42df9af | 2021-08-24 19:26:56 +0200 | [diff] [blame] | 207 | __weak void soc_validate_fspm_header(const struct fsp_header *hdr) |
Johnny Lin | 5b47d77 | 2020-11-13 17:21:25 +0800 | [diff] [blame] | 208 | { |
Johnny Lin | 5b47d77 | 2020-11-13 17:21:25 +0800 | [diff] [blame] | 209 | } |