| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <cpu/cpu.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/smm.h> |
| #include <cpu/amd/msr.h> |
| #include <cpu/amd/amd64_save_state.h> |
| #include <cpu/x86/lapic.h> |
| #include <device/device.h> |
| #include <device/pci_ops.h> |
| #include <soc/pci_devs.h> |
| #include <soc/cpu.h> |
| #include <soc/reset.h> |
| #include <soc/smi.h> |
| #include <soc/iomap.h> |
| #include <console/console.h> |
| |
| /* |
| * MP and SMM loading initialization. |
| */ |
| struct smm_relocation_params { |
| msr_t tseg_base; |
| msr_t tseg_mask; |
| }; |
| |
| static struct smm_relocation_params smm_reloc_params; |
| |
| /* |
| * Do essential initialization tasks before APs can be fired up - |
| * |
| * 1. Prevent race condition in MTRR solution. Enable MTRRs on the BSP. This |
| * creates the MTRR solution that the APs will use. Otherwise APs will try to |
| * apply the incomplete solution as the BSP is calculating it. |
| */ |
| static void pre_mp_init(void) |
| { |
| x86_setup_mtrrs_with_detect(); |
| x86_mtrr_check(); |
| } |
| |
| int get_cpu_count(void) |
| { |
| return 1 + (cpuid_ecx(0x80000008) & 0xff); |
| } |
| |
| static void fill_in_relocation_params(struct smm_relocation_params *params) |
| { |
| uintptr_t tseg_base; |
| size_t tseg_size; |
| |
| smm_region(&tseg_base, &tseg_size); |
| |
| params->tseg_base.lo = ALIGN_DOWN(tseg_base, 128 * KiB); |
| params->tseg_base.hi = 0; |
| params->tseg_mask.lo = ALIGN_DOWN(~(tseg_size - 1), 128 * KiB); |
| params->tseg_mask.hi = ((1 << (cpu_phys_address_size() - 32)) - 1); |
| |
| params->tseg_mask.lo |= SMM_TSEG_WB; |
| } |
| |
| 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"); |
| |
| fill_in_relocation_params(&smm_reloc_params); |
| |
| smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize); |
| *smm_save_state_size = sizeof(amd64_smm_state_save_area_t); |
| } |
| |
| static void relocation_handler(int cpu, uintptr_t curr_smbase, |
| uintptr_t staggered_smbase) |
| { |
| struct smm_relocation_params *relo_params = &smm_reloc_params; |
| amd64_smm_state_save_area_t *smm_state; |
| |
| wrmsr(SMM_ADDR_MSR, relo_params->tseg_base); |
| wrmsr(SMM_MASK_MSR, relo_params->tseg_mask); |
| |
| smm_state = (void *)(SMM_AMD64_SAVE_STATE_OFFSET + curr_smbase); |
| smm_state->smbase = staggered_smbase; |
| } |
| |
| static const struct mp_ops mp_ops = { |
| .pre_mp_init = pre_mp_init, |
| .get_cpu_count = get_cpu_count, |
| .get_smm_info = get_smm_info, |
| .relocation_handler = relocation_handler, |
| .post_mp_init = enable_smi_generation, |
| }; |
| |
| void mp_init_cpus(struct bus *cpu_bus) |
| { |
| /* Clear for take-off */ |
| if (mp_init_with_smm(cpu_bus, &mp_ops) < 0) |
| printk(BIOS_ERR, "MP initialization failure.\n"); |
| |
| /* pre_mp_init made the flash not cacheable. Reset to WP for performance. */ |
| mtrr_use_temp_range(FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT); |
| |
| set_warm_reset_flag(); |
| } |
| |
| static void model_17_init(struct device *dev) |
| { |
| check_mca(); |
| setup_lapic(); |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = model_17_init, |
| }; |
| |
| static struct cpu_device_id cpu_table[] = { |
| { X86_VENDOR_AMD, PICASSO_B0_CPUID }, |
| { X86_VENDOR_AMD, PICASSO_B1_CPUID }, |
| { X86_VENDOR_AMD, RAVEN2_A0_CPUID }, |
| { X86_VENDOR_AMD, RAVEN2_A1_CPUID }, |
| { 0, 0 }, |
| }; |
| |
| static const struct cpu_driver model_17 __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| }; |