Arthur Heymans | e69d2df | 2020-12-01 18:29:13 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <console/console.h> |
| 4 | #include <cpu/x86/mp.h> |
| 5 | #include <stdint.h> |
| 6 | #include <cpu/intel/smm_reloc.h> |
| 7 | #include <cpu/amd/amd64_save_state.h> |
| 8 | #include <mainboard/emulation/qemu-i440fx/fw_cfg.h> |
| 9 | |
| 10 | static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, |
| 11 | size_t *smm_save_state_size) |
| 12 | { |
| 13 | printk(BIOS_DEBUG, "Setting up SMI for CPU\n"); |
| 14 | |
Arthur Heymans | 4db2e8e | 2021-10-28 16:48:36 +0200 | [diff] [blame^] | 15 | if (CONFIG(SMM_TSEG)) |
| 16 | smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize); |
| 17 | |
| 18 | if (CONFIG(SMM_ASEG)) { |
| 19 | smm_open_aseg(); |
| 20 | *perm_smbase = 0xa0000; |
| 21 | *perm_smsize = 0x10000; |
| 22 | } |
Arthur Heymans | e69d2df | 2020-12-01 18:29:13 +0100 | [diff] [blame] | 23 | |
| 24 | /* FIXME: on X86_64 the save state size is smaller than the size of the SMM stub */ |
| 25 | *smm_save_state_size = sizeof(amd64_smm_state_save_area_t); |
Benjamin Doron | 8c5994f | 2021-03-20 15:41:57 +0000 | [diff] [blame] | 26 | printk(BIOS_DEBUG, "Save state size: 0x%zx bytes\n", *smm_save_state_size); |
Arthur Heymans | e69d2df | 2020-12-01 18:29:13 +0100 | [diff] [blame] | 27 | } |
| 28 | |
| 29 | /* |
| 30 | * The relocation work is actually performed in SMM context, but the code |
| 31 | * resides in the ramstage module. This occurs by trampolining from the default |
| 32 | * SMRAM entry point to here. |
| 33 | */ |
| 34 | static void relocation_handler(int cpu, uintptr_t curr_smbase, |
| 35 | uintptr_t staggered_smbase) |
| 36 | { |
| 37 | /* The em64t101 save state is sufficiently compatible with older |
| 38 | save states with regards of smbase, smm_revision. */ |
| 39 | amd64_smm_state_save_area_t *save_state; |
| 40 | u32 smbase = staggered_smbase; |
| 41 | |
| 42 | save_state = (void *)(curr_smbase + SMM_DEFAULT_SIZE - sizeof(*save_state)); |
| 43 | save_state->smbase = smbase; |
| 44 | |
| 45 | printk(BIOS_DEBUG, "In relocation handler: cpu %d\n", cpu); |
| 46 | printk(BIOS_DEBUG, "SMM revision: 0x%08x\n", save_state->smm_revision); |
| 47 | printk(BIOS_DEBUG, "New SMBASE=0x%08x\n", smbase); |
| 48 | } |
| 49 | |
| 50 | static void post_mp_init(void) |
| 51 | { |
| 52 | /* Now that all APs have been relocated as well as the BSP let SMIs start flowing. */ |
| 53 | global_smi_enable(); |
| 54 | |
| 55 | /* Lock down the SMRAM space. */ |
| 56 | smm_lock(); |
| 57 | } |
| 58 | |
| 59 | const struct mp_ops mp_ops_with_smm = { |
| 60 | .get_cpu_count = fw_cfg_max_cpus, |
| 61 | .get_smm_info = get_smm_info, |
| 62 | .pre_mp_smm_init = smm_southbridge_clear_state, |
| 63 | .relocation_handler = relocation_handler, |
| 64 | .post_mp_init = post_mp_init, |
| 65 | }; |