| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <cpu/x86/mp.h> |
| #include <stdint.h> |
| #include <cpu/intel/smm_reloc.h> |
| #include <cpu/amd/amd64_save_state.h> |
| #include <mainboard/emulation/qemu-i440fx/fw_cfg.h> |
| |
| static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, |
| size_t *smm_save_state_size) |
| { |
| printk(BIOS_DEBUG, "Setting up SMI for CPU\n"); |
| |
| smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize); |
| |
| /* FIXME: on X86_64 the save state size is smaller than the size of the SMM stub */ |
| *smm_save_state_size = sizeof(amd64_smm_state_save_area_t); |
| printk(BIOS_DEBUG, "Save state size: 0x%zx bytes\n", *smm_save_state_size); |
| } |
| |
| /* |
| * The relocation work is actually performed in SMM context, but the code |
| * resides in the ramstage module. This occurs by trampolining from the default |
| * SMRAM entry point to here. |
| */ |
| static void relocation_handler(int cpu, uintptr_t curr_smbase, |
| uintptr_t staggered_smbase) |
| { |
| /* The em64t101 save state is sufficiently compatible with older |
| save states with regards of smbase, smm_revision. */ |
| amd64_smm_state_save_area_t *save_state; |
| u32 smbase = staggered_smbase; |
| |
| save_state = (void *)(curr_smbase + SMM_DEFAULT_SIZE - sizeof(*save_state)); |
| save_state->smbase = smbase; |
| |
| printk(BIOS_DEBUG, "In relocation handler: cpu %d\n", cpu); |
| printk(BIOS_DEBUG, "SMM revision: 0x%08x\n", save_state->smm_revision); |
| printk(BIOS_DEBUG, "New SMBASE=0x%08x\n", smbase); |
| } |
| |
| static void post_mp_init(void) |
| { |
| /* Now that all APs have been relocated as well as the BSP let SMIs start flowing. */ |
| global_smi_enable(); |
| |
| /* Lock down the SMRAM space. */ |
| smm_lock(); |
| } |
| |
| const struct mp_ops mp_ops_with_smm = { |
| .get_cpu_count = fw_cfg_max_cpus, |
| .get_smm_info = get_smm_info, |
| .pre_mp_smm_init = smm_southbridge_clear_state, |
| .relocation_handler = relocation_handler, |
| .post_mp_init = post_mp_init, |
| }; |