cpu.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <amdblocks/cpu.h>
#include <amdblocks/mca.h>
#include <amdblocks/reset.h>
#include <amdblocks/smm.h>
#include <assert.h>
#include <console/console.h>
#include <cpu/amd/microcode.h>
#include <cpu/cpu.h>
#include <cpu/x86/mp.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/smm.h>
#include <acpi/acpi.h>
#include <device/device.h>
#include <soc/cpu.h>
#include <soc/iomap.h>
#include <types.h>
 
_Static_assert(CONFIG_MAX_CPUS == 16, "Do not override MAX_CPUS. To reduce the number of "
        "available cores, use the downcore_mode and disable_smt devicetree settings instead.");
 
/* MP and SMM loading initialization */
 
/*
 * 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_no_above_4gb();
        x86_mtrr_check();
}
 
static void post_mp_init(void)
{
        global_smi_enable();
 
        /* SMMINFO only needs to be set up when booting from S5 */
        if (!acpi_is_wakeup_s3())
                apm_control(APM_CNT_SMMINFO);
}
 
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 = smm_relocation_handler,
        .post_mp_init = post_mp_init,
};
 
void mp_init_cpus(struct bus *cpu_bus)
{
        if (mp_init_with_smm(cpu_bus, &mp_ops) != CB_SUCCESS)
                die_with_post_code(POST_HW_INIT_FAILURE,
                                "mp_init_with_smm failed. Halting.\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);
}
 
static void zen_2_3_init(struct device *dev)
{
        check_mca();
        set_cstate_io_addr();
 
        amd_update_microcode_from_cbfs();
}
 
static struct device_operations cpu_dev_ops = {
        .init = zen_2_3_init,
};
 
static struct cpu_device_id cpu_table[] = {
        { X86_VENDOR_AMD, CEZANNE_A0_CPUID},
        { 0, 0 },
};
 
static const struct cpu_driver zen_2_3 __cpu_driver = {
        .ops      = &cpu_dev_ops,
        .id_table = cpu_table,
};