mp_init.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <assert.h>
#include <bootstate.h>
#include <console/console.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mp.h>
#include <cpu/intel/microcode.h>
#include <intelblocks/cfg.h>
#include <intelblocks/cpulib.h>
#include <intelblocks/fast_spi.h>
#include <intelblocks/mp_init.h>
#include <intelblocks/msr.h>
#include <soc/cpu.h>
 
static void init_one_cpu(struct device *dev)
{
        soc_core_init(dev);
 
        const void *microcode_patch = intel_microcode_find();
        intel_microcode_load_unlocked(microcode_patch);
}
 
static struct device_operations cpu_dev_ops = {
        .init = init_one_cpu,
};
 
static const struct cpu_device_id cpu_table[] = {
        { X86_VENDOR_INTEL, CPUID_METEORLAKE_A0_1},
        { X86_VENDOR_INTEL, CPUID_METEORLAKE_A0_2},
        { X86_VENDOR_INTEL, CPUID_SKYLAKE_C0 },
        { X86_VENDOR_INTEL, CPUID_SKYLAKE_D0 },
        { X86_VENDOR_INTEL, CPUID_SKYLAKE_HQ0 },
        { X86_VENDOR_INTEL, CPUID_SKYLAKE_HR0 },
        { X86_VENDOR_INTEL, CPUID_KABYLAKE_G0 },
        { X86_VENDOR_INTEL, CPUID_KABYLAKE_H0 },
        { X86_VENDOR_INTEL, CPUID_KABYLAKE_Y0 },
        { X86_VENDOR_INTEL, CPUID_KABYLAKE_HA0 },
        { X86_VENDOR_INTEL, CPUID_KABYLAKE_HB0 },
        { X86_VENDOR_INTEL, CPUID_CANNONLAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_CANNONLAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_CANNONLAKE_C0 },
        { X86_VENDOR_INTEL, CPUID_CANNONLAKE_D0 },
        { X86_VENDOR_INTEL, CPUID_APOLLOLAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_APOLLOLAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_APOLLOLAKE_E0 },
        { X86_VENDOR_INTEL, CPUID_GLK_A0 },
        { X86_VENDOR_INTEL, CPUID_GLK_B0 },
        { X86_VENDOR_INTEL, CPUID_GLK_R0 },
        { X86_VENDOR_INTEL, CPUID_WHISKEYLAKE_V0 },
        { X86_VENDOR_INTEL, CPUID_WHISKEYLAKE_W0 },
        { X86_VENDOR_INTEL, CPUID_COFFEELAKE_U0 },
        { X86_VENDOR_INTEL, CPUID_COFFEELAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_COFFEELAKE_P0 },
        { X86_VENDOR_INTEL, CPUID_COFFEELAKE_R0 },
        { X86_VENDOR_INTEL, CPUID_ICELAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_ICELAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_U_A0 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_U_K0_S0 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_H_S_6_2_G0 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_H_S_6_2_G1 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_H_S_10_2_P0 },
        { X86_VENDOR_INTEL, CPUID_COMETLAKE_H_S_10_2_Q0_P1 },
        { X86_VENDOR_INTEL, CPUID_TIGERLAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_TIGERLAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_TIGERLAKE_R0 },
        { X86_VENDOR_INTEL, CPUID_ELKHARTLAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_ELKHARTLAKE_B0 },
        { X86_VENDOR_INTEL, CPUID_JASPERLAKE_A0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_S_A0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_J0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_K0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_L0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_Q0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_R0 },
        { X86_VENDOR_INTEL, CPUID_ALDERLAKE_N_A0 },
        { 0, 0 },
};
 
static const struct cpu_driver driver __cpu_driver = {
        .ops      = &cpu_dev_ops,
        .id_table = cpu_table,
};
 
/*
 * MP Init callback function to Find CPU Topology. This function is common
 * among all SOCs and thus its in Common CPU block.
 */
int get_cpu_count(void)
{
        unsigned int num_virt_cores, num_phys_cores;
 
        cpu_read_topology(&num_phys_cores, &num_virt_cores);
 
        printk(BIOS_DEBUG, "Detected %u core, %u thread CPU.\n",
               num_phys_cores, num_virt_cores);
 
        return num_virt_cores;
}
 
/*
 * MP Init callback function(get_microcode_info) to find the Microcode at
 * Pre MP Init phase. This function is common among all SOCs and thus its in
 * Common CPU block.
 * This function also fills in the microcode patch (in *microcode), and also
 * sets the argument *parallel to 1, which allows microcode loading in all
 * APs to occur in parallel during MP Init.
 */
void get_microcode_info(const void **microcode, int *parallel)
{
        *microcode = intel_microcode_find();
        *parallel = 1;
}
 
/*
 * Perform BSP and AP initialization
 * This function can be called in below cases:
 * 1. During coreboot is doing MP initialization as part of BS_DEV_INIT_CHIPS (exclude
 *    this call if user has selected USE_INTEL_FSP_MP_INIT).
 * 2. coreboot would like to take APs control back after FSP-S has done with MP
 *    initialization based on user select USE_INTEL_FSP_MP_INIT.
 *
 * This function would use cpu_cluster as a device and APIC device as a linked list to
 * the cpu cluster. This function adds a node in case the mainboard doesn't have a lapic id
 * hardcoded in devicetree, and then fills with the actual BSP APIC ID.
 * This allows coreboot to dynamically detect the LAPIC ID of BSP.
 * In case the mainboard has an APIC ID defined in devicetree, a link will be present and
 * creation of the new node will be skipped. This node will have the APIC ID defined
 * in devicetree.
 */
void init_cpus(void)
{
        struct device *dev = dev_find_path(NULL, DEVICE_PATH_CPU_CLUSTER);
        assert(dev != NULL);
 
        /* In case link to APIC device is not found, create the one */
        if (!dev->link_list)
                add_more_links(dev, 1);
 
        soc_init_cpus(dev->link_list);
}
 
static void coreboot_init_cpus(void *unused)
{
        if (CONFIG(USE_INTEL_FSP_MP_INIT))
                return;
 
        const void *microcode_patch = intel_microcode_find();
        intel_microcode_load_unlocked(microcode_patch);
 
        init_cpus();
}
 
static void post_cpus_add_romcache(void)
{
        if (!CONFIG(BOOT_DEVICE_MEMORY_MAPPED))
                return;
 
        fast_spi_cache_bios_region();
}
 
static void wrapper_x86_setup_mtrrs(void *unused)
{
        x86_setup_mtrrs_with_detect();
}
 
/* Ensure to re-program all MTRRs based on DRAM resource settings */
static void post_cpus_init(void *unused)
{
        if (mp_run_on_all_cpus(&wrapper_x86_setup_mtrrs, NULL) != CB_SUCCESS)
                printk(BIOS_ERR, "MTRR programming failure\n");
 
        post_cpus_add_romcache();
        x86_mtrr_check();
}
 
/* Do CPU MP Init before FSP Silicon Init */
BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_ENTRY, coreboot_init_cpus, NULL);
BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_EXIT, post_cpus_init, NULL);
BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, post_cpus_init, NULL);