| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/cpu.h> |
| #include <amdblocks/iomap.h> |
| #include <amdblocks/mca.h> |
| #include <amdblocks/reset.h> |
| #include <cpu/amd/msr.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/msr.h> |
| #include <device/device.h> |
| #include <device/pci_ops.h> |
| #include <soc/pci_devs.h> |
| #include <soc/cpu.h> |
| #include <soc/iomap.h> |
| #include <console/console.h> |
| #include <types.h> |
| |
| /* |
| * MP and SMM loading initialization. |
| */ |
| void mp_init_cpus(struct bus *cpu_bus) |
| { |
| extern const struct mp_ops amd_mp_ops_with_smm; |
| if (mp_init_with_smm(cpu_bus, &amd_mp_ops_with_smm) != CB_SUCCESS) |
| die_with_post_code(POST_HW_INIT_FAILURE, |
| "mp_init_with_smm failed. Halting.\n"); |
| |
| /* The flash is now no longer cacheable. Reset to WP for performance. */ |
| mtrr_use_temp_range(FLASH_BELOW_4GB_MAPPING_REGION_BASE, |
| FLASH_BELOW_4GB_MAPPING_REGION_SIZE, MTRR_TYPE_WRPROT); |
| |
| set_warm_reset_flag(); |
| } |
| |
| static void model_15_init(struct device *dev) |
| { |
| check_mca(); |
| |
| /* |
| * Per AMD, sync an undocumented MSR with the PSP base address. |
| * Experiments showed that if you write to the MSR after it has |
| * been previously programmed, it causes a general protection fault. |
| * Also, the MSR survives warm reset and S3 cycles, so we need to |
| * test if it was previously written before writing to it. |
| */ |
| msr_t psp_msr; |
| uint32_t psp_bar; /* Note: NDA BKDG names this 32-bit register BAR3 */ |
| psp_bar = pci_read_config32(SOC_PSP_DEV, PCI_BASE_ADDRESS_4); |
| psp_bar &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; |
| psp_msr = rdmsr(PSP_ADDR_MSR); |
| if (psp_msr.lo == 0) { |
| psp_msr.lo = psp_bar; |
| wrmsr(PSP_ADDR_MSR, psp_msr); |
| } |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = model_15_init, |
| }; |
| |
| static struct cpu_device_id cpu_table[] = { |
| { X86_VENDOR_AMD, CPUID_FROM_FMS(0x15, 0x60, 0), CPUID_ALL_STEPPINGS_MASK }, |
| { X86_VENDOR_AMD, CPUID_FROM_FMS(0x15, 0x70, 0), CPUID_ALL_STEPPINGS_MASK }, |
| CPU_TABLE_END |
| }; |
| |
| static const struct cpu_driver model_15 __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| }; |