src/soc/intel/elkhartlake/cpu.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cpu/intel/smm_reloc.h>
   4 #include <cpu/intel/turbo.h>
   5 #include <cpu/intel/common/common.h>
   6 #include <cpu/x86/mp.h>
   7 #include <cpu/x86/msr.h>
   8 #include <device/pci.h>
   9 #include <fsp/api.h>
  10 #include <intelblocks/cpulib.h>
  11 #include <intelblocks/mp_init.h>
  12 #include <intelblocks/msr.h>
  13 #include <soc/cpu.h>
  14 #include <soc/msr.h>
  15 #include <soc/pci_devs.h>
  16 #include <soc/soc_chip.h>
  17 #include <static.h>
  18 #include <types.h>
  19
  20 bool cpu_soc_is_in_untrusted_mode(void)
  21 {
  22         msr_t msr;
  23
  24         msr = rdmsr(MSR_BIOS_DONE);
  25         return !!(msr.lo & ENABLE_IA_UNTRUSTED);
  26 }
  27
  28 void cpu_soc_bios_done(void)
  29 {
  30         msr_t msr;
  31
  32         msr = rdmsr(MSR_BIOS_DONE);
  33         msr.lo |= ENABLE_IA_UNTRUSTED;
  34         wrmsr(MSR_BIOS_DONE, msr);
  35 }
  36
  37 static void soc_fsp_load(void)
  38 {
  39         fsps_load();
  40 }
  41
  42 static void configure_misc(void)
  43 {
  44         msr_t msr;
  45
  46         config_t *conf = config_of_soc();
  47
  48         msr = rdmsr(IA32_MISC_ENABLE);
  49         msr.lo |= (1 << 0);     /* Fast String enable */
  50         msr.lo |= (1 << 3);     /* TM1/TM2/EMTTM enable */
  51         wrmsr(IA32_MISC_ENABLE, msr);
  52
  53         /* Set EIST status */
  54         cpu_set_eist(conf->eist_enable);
  55
  56         /* Disable Thermal interrupts */
  57         msr.lo = 0;
  58         msr.hi = 0;
  59         wrmsr(IA32_THERM_INTERRUPT, msr);
  60
  61         /* Enable package critical interrupt only */
  62         msr.lo = 1 << 4;
  63         msr.hi = 0;
  64         wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr);
  65
  66         /* Enable PROCHOT */
  67         msr = rdmsr(MSR_POWER_CTL);
  68         msr.lo |= (1 << 0);     /* Enable Bi-directional PROCHOT as an input */
  69         msr.lo |= (1 << 23);    /* Lock it */
  70         wrmsr(MSR_POWER_CTL, msr);
  71
  72         /* In some cases it is beneficial for the performance to disable the
  73            L1 prefetcher as on Elkhart Lake it is set up a bit too aggressive. */
  74         if (conf->L1_prefetcher_disable) {
  75                 msr = rdmsr(MSR_PREFETCH_CTL);
  76                 msr.lo |= PREFETCH_L1_DISABLE;
  77                 wrmsr(MSR_PREFETCH_CTL, msr);
  78         }
  79 }
  80
  81 /* All CPUs including BSP will run the following function. */
  82 void soc_core_init(struct device *cpu)
  83 {
  84         /* Clear out pending MCEs */
  85         /* TODO(adurbin): This should only be done on a cold boot. Also, some
  86          * of these banks are core vs package scope. For now every CPU clears
  87          * every bank. */
  88         mca_configure();
  89
  90         enable_lapic_tpr();
  91
  92         /* Configure Enhanced SpeedStep and Thermal Sensors */
  93         configure_misc();
  94
  95         enable_pm_timer_emulation();
  96
  97         /* Enable Direct Cache Access */
  98         configure_dca_cap();
  99
 100         /* Set energy policy */
 101         set_energy_perf_bias(ENERGY_POLICY_NORMAL);
 102
 103         /* Enable Turbo */
 104         enable_turbo();
 105 }
 106
 107 static void per_cpu_smm_trigger(void)
 108 {
 109         /* Relocate the SMM handler. */
 110         smm_relocate();
 111 }
 112
 113 static void post_mp_init(void)
 114 {
 115         /* Set Max Ratio */
 116         cpu_set_max_ratio();
 117
 118         /*
 119          * Now that all APs have been relocated as well as the BSP let SMIs
 120          * start flowing.
 121          */
 122         global_smi_enable();
 123 }
 124
 125 static const struct mp_ops mp_ops = {
 126         /*
 127          * Skip Pre MP init MTRR programming as MTRRs are mirrored from BSP,
 128          * that are set prior to ramstage.
 129          * Real MTRRs programming are being done after resource allocation.
 130          */
 131         .pre_mp_init = soc_fsp_load,
 132         .get_cpu_count = get_cpu_count,
 133         .get_smm_info = smm_info,
 134         .get_microcode_info = get_microcode_info,
 135         .pre_mp_smm_init = smm_initialize,
 136         .per_cpu_smm_trigger = per_cpu_smm_trigger,
 137         .relocation_handler = smm_relocation_handler,
 138         .post_mp_init = post_mp_init,
 139 };
 140
 141 void mp_init_cpus(struct bus *cpu_bus)
 142 {
 143         /* TODO: Handle mp_init_with_smm failure? */
 144         mp_init_with_smm(cpu_bus, &mp_ops);
 145
 146         /* Thermal throttle activation offset */
 147         configure_tcc_thermal_target();
 148 }