Patrick Georgi | 11f0079 | 2020-03-04 15:10:45 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 2 | |
Kyösti Mälkki | a963acd | 2019-08-16 20:34:25 +0300 | [diff] [blame] | 3 | #include <arch/romstage.h> |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 4 | #include <cbmem.h> |
| 5 | #include <console/console.h> |
| 6 | #include <cpu/x86/msr.h> |
| 7 | #include <cpu/x86/mtrr.h> |
Subrata Banik | 8edc6dc | 2019-08-22 11:30:52 +0530 | [diff] [blame] | 8 | #include <cpu/x86/smm.h> |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 9 | #include <program_loading.h> |
Kyösti Mälkki | 4f14cd8 | 2019-12-18 19:40:48 +0200 | [diff] [blame] | 10 | #include <reset.h> |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 11 | #include <rmodule.h> |
Elyes Haouas | ae1ca82 | 2022-10-07 10:02:38 +0200 | [diff] [blame] | 12 | #include <security/vboot/vboot_common.h> |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 13 | #include <stage_cache.h> |
Subrata Banik | 2847e1e | 2019-02-25 20:31:22 +0530 | [diff] [blame] | 14 | #include <timestamp.h> |
Elyes Haouas | ae1ca82 | 2022-10-07 10:02:38 +0200 | [diff] [blame] | 15 | #include <types.h> |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 16 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 17 | static size_t var_mtrr_ctx_size(void) |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 18 | { |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 19 | int mtrr_count = get_var_mtrr_count(); |
| 20 | return sizeof(struct var_mtrr_context) + mtrr_count * 2 * sizeof(msr_t); |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 21 | } |
| 22 | |
Arthur Heymans | ba00d10 | 2022-02-15 11:04:15 +0100 | [diff] [blame] | 23 | static int postcar_frame_init(struct postcar_frame *pcf) |
Kyösti Mälkki | 029cebc | 2016-12-02 19:47:07 +0200 | [diff] [blame] | 24 | { |
Arthur Heymans | 876a1b4 | 2022-02-15 11:06:10 +0100 | [diff] [blame] | 25 | memset(pcf, 0, sizeof(*pcf)); |
| 26 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 27 | struct var_mtrr_context *ctx; |
Kyösti Mälkki | 029cebc | 2016-12-02 19:47:07 +0200 | [diff] [blame] | 28 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 29 | ctx = cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, var_mtrr_ctx_size()); |
| 30 | if (ctx == NULL) { |
| 31 | printk(BIOS_ERR, "Couldn't add var_mtrr_ctx setup in cbmem.\n"); |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 32 | return -1; |
| 33 | } |
| 34 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 35 | pcf->mtrr = ctx; |
| 36 | var_mtrr_context_init(pcf->mtrr); |
| 37 | |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | void postcar_frame_add_mtrr(struct postcar_frame *pcf, |
| 42 | uintptr_t addr, size_t size, int type) |
| 43 | { |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 44 | var_mtrr_set(pcf->mtrr, addr, size, type); |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 45 | } |
| 46 | |
Nico Huber | 36ec3e9 | 2018-05-27 14:32:27 +0200 | [diff] [blame] | 47 | void postcar_frame_add_romcache(struct postcar_frame *pcf, int type) |
| 48 | { |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 49 | if (!CONFIG(BOOT_DEVICE_MEMORY_MAPPED)) |
Nico Huber | 36ec3e9 | 2018-05-27 14:32:27 +0200 | [diff] [blame] | 50 | return; |
| 51 | postcar_frame_add_mtrr(pcf, CACHE_ROM_BASE, CACHE_ROM_SIZE, type); |
| 52 | } |
| 53 | |
Aaron Durbin | e893674 | 2020-04-29 14:20:05 -0600 | [diff] [blame] | 54 | static void postcar_frame_common_mtrrs(struct postcar_frame *pcf) |
Kyösti Mälkki | 544878b | 2019-08-09 11:41:15 +0300 | [diff] [blame] | 55 | { |
| 56 | if (pcf->skip_common_mtrr) |
| 57 | return; |
| 58 | |
Kyösti Mälkki | 544878b | 2019-08-09 11:41:15 +0300 | [diff] [blame] | 59 | /* Cache the ROM as WP just below 4GiB. */ |
| 60 | postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT); |
| 61 | } |
| 62 | |
Arthur Heymans | ba00d10 | 2022-02-15 11:04:15 +0100 | [diff] [blame] | 63 | static void run_postcar_phase(struct postcar_frame *pcf); |
| 64 | |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 65 | /* prepare_and_run_postcar() determines the stack to use after |
| 66 | * cache-as-ram is torn down as well as the MTRR settings to use. */ |
Arthur Heymans | efd2720 | 2022-07-13 07:20:47 +0200 | [diff] [blame] | 67 | void __noreturn prepare_and_run_postcar(void) |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 68 | { |
Arthur Heymans | 876a1b4 | 2022-02-15 11:06:10 +0100 | [diff] [blame] | 69 | struct postcar_frame pcf; |
| 70 | |
| 71 | if (postcar_frame_init(&pcf)) |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 72 | die("Unable to initialize postcar frame.\n"); |
| 73 | |
Arthur Heymans | 876a1b4 | 2022-02-15 11:06:10 +0100 | [diff] [blame] | 74 | fill_postcar_frame(&pcf); |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 75 | |
Arthur Heymans | 876a1b4 | 2022-02-15 11:06:10 +0100 | [diff] [blame] | 76 | postcar_frame_common_mtrrs(&pcf); |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 77 | |
Arthur Heymans | 876a1b4 | 2022-02-15 11:06:10 +0100 | [diff] [blame] | 78 | run_postcar_phase(&pcf); |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 79 | /* We do not return here. */ |
Arthur Heymans | efd2720 | 2022-07-13 07:20:47 +0200 | [diff] [blame] | 80 | die("Failed to load postcar\n!"); |
Kyösti Mälkki | cd7a70f | 2019-08-17 20:51:08 +0300 | [diff] [blame] | 81 | } |
| 82 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 83 | static void finalize_load(uintptr_t *reloc_params, uintptr_t mtrr_frame_ptr) |
Rizwan Qureshi | b1b44d3 | 2016-08-26 21:08:50 +0530 | [diff] [blame] | 84 | { |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 85 | *reloc_params = mtrr_frame_ptr; |
Kyösti Mälkki | a7421fb | 2017-09-05 22:43:05 +0300 | [diff] [blame] | 86 | /* |
| 87 | * Signal to rest of system that another update was made to the |
| 88 | * postcar program prior to running it. |
| 89 | */ |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 90 | prog_segment_loaded((uintptr_t)reloc_params, sizeof(uintptr_t), SEG_FINAL); |
| 91 | prog_segment_loaded((uintptr_t)mtrr_frame_ptr, var_mtrr_ctx_size(), SEG_FINAL); |
Kyösti Mälkki | a7421fb | 2017-09-05 22:43:05 +0300 | [diff] [blame] | 92 | } |
| 93 | |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 94 | static void load_postcar_cbfs(struct prog *prog, struct postcar_frame *pcf) |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 95 | { |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 96 | struct rmod_stage_load rsl = { |
| 97 | .cbmem_id = CBMEM_ID_AFTER_CAR, |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 98 | .prog = prog, |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 99 | }; |
| 100 | |
Wim Vervoorn | 1058dd8 | 2019-11-01 10:22:22 +0100 | [diff] [blame] | 101 | vboot_run_logic(); |
| 102 | |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 103 | if (rmodule_stage_load(&rsl)) |
Keith Short | 7006458 | 2019-05-06 16:12:57 -0600 | [diff] [blame] | 104 | die_with_post_code(POST_INVALID_ROM, |
| 105 | "Failed to load after CAR program.\n"); |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 106 | |
| 107 | /* Set the stack pointer within parameters of the program loaded. */ |
| 108 | if (rsl.params == NULL) |
Keith Short | 7006458 | 2019-05-06 16:12:57 -0600 | [diff] [blame] | 109 | die_with_post_code(POST_INVALID_ROM, |
| 110 | "No parameters found in after CAR program.\n"); |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 111 | |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 112 | finalize_load(rsl.params, (uintptr_t)pcf->mtrr); |
Aaron Durbin | dd95e00 | 2016-03-31 13:36:33 -0500 | [diff] [blame] | 113 | |
Subrata Banik | 90f750b | 2019-06-11 17:52:06 +0530 | [diff] [blame] | 114 | stage_cache_add(STAGE_POSTCAR, prog); |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 115 | } |
| 116 | |
Subrata Banik | 8edc6dc | 2019-08-22 11:30:52 +0530 | [diff] [blame] | 117 | /* |
| 118 | * Cache the TSEG region at the top of ram. This region is |
| 119 | * not restricted to SMM mode until SMM has been relocated. |
| 120 | * By setting the region to cacheable it provides faster access |
| 121 | * when relocating the SMM handler as well as using the TSEG |
| 122 | * region for other purposes. |
| 123 | */ |
| 124 | void postcar_enable_tseg_cache(struct postcar_frame *pcf) |
| 125 | { |
| 126 | uintptr_t smm_base; |
| 127 | size_t smm_size; |
| 128 | |
| 129 | smm_region(&smm_base, &smm_size); |
| 130 | postcar_frame_add_mtrr(pcf, smm_base, smm_size, |
| 131 | MTRR_TYPE_WRBACK); |
| 132 | } |
| 133 | |
Kyösti Mälkki | 4f14cd8 | 2019-12-18 19:40:48 +0200 | [diff] [blame] | 134 | static void postcar_cache_invalid(void) |
| 135 | { |
| 136 | printk(BIOS_ERR, "postcar cache invalid.\n"); |
| 137 | board_reset(); |
| 138 | } |
| 139 | |
Arthur Heymans | ba00d10 | 2022-02-15 11:04:15 +0100 | [diff] [blame] | 140 | static void run_postcar_phase(struct postcar_frame *pcf) |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 141 | { |
| 142 | struct prog prog = |
Philipp Deppenwiese | 01797b1 | 2018-11-08 10:39:39 +0100 | [diff] [blame] | 143 | PROG_INIT(PROG_POSTCAR, CONFIG_CBFS_PREFIX "/postcar"); |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 144 | |
Kyösti Mälkki | e0165fb | 2021-01-09 13:30:57 +0200 | [diff] [blame] | 145 | if (resume_from_stage_cache()) { |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 146 | stage_cache_load_stage(STAGE_POSTCAR, &prog); |
Aaron Durbin | c546c76 | 2018-04-23 14:55:09 -0600 | [diff] [blame] | 147 | /* This is here to allow platforms to pass different stack |
| 148 | parameters between S3 resume and normal boot. On the |
| 149 | platforms where the values are the same it's a nop. */ |
Arthur Heymans | 46b409d | 2021-05-14 13:19:43 +0200 | [diff] [blame] | 150 | finalize_load(prog.arg, (uintptr_t)pcf->mtrr); |
Kyösti Mälkki | 4f14cd8 | 2019-12-18 19:40:48 +0200 | [diff] [blame] | 151 | |
| 152 | if (prog_entry(&prog) == NULL) |
| 153 | postcar_cache_invalid(); |
Kyösti Mälkki | a7421fb | 2017-09-05 22:43:05 +0300 | [diff] [blame] | 154 | } else |
Aaron Durbin | d008413 | 2016-11-29 15:52:08 -0600 | [diff] [blame] | 155 | load_postcar_cbfs(&prog, pcf); |
| 156 | |
Subrata Banik | 2847e1e | 2019-02-25 20:31:22 +0530 | [diff] [blame] | 157 | /* As postcar exist, it's end of romstage here */ |
Jakub Czapiga | ad6157e | 2022-02-15 11:50:31 +0100 | [diff] [blame] | 158 | timestamp_add_now(TS_ROMSTAGE_END); |
Subrata Banik | 2847e1e | 2019-02-25 20:31:22 +0530 | [diff] [blame] | 159 | |
Kyösti Mälkki | 45ddb43 | 2019-11-02 14:12:18 +0200 | [diff] [blame] | 160 | console_time_report(); |
| 161 | |
Arthur Heymans | 5331a7c | 2019-10-23 17:07:15 +0200 | [diff] [blame] | 162 | prog_set_arg(&prog, cbmem_top()); |
| 163 | |
Aaron Durbin | 7f8afe0 | 2016-03-18 12:21:23 -0500 | [diff] [blame] | 164 | prog_run(&prog); |
| 165 | } |