src/drivers/amd/agesa/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <halt.h>
   5 #include <amdblocks/amd_pci_mmconf.h>
   6 #include <amdblocks/biosram.h>
   7 #include <arch/bootblock.h>
   8 #include <cpu/x86/mtrr.h>
   9 #include <cpu/x86/lapic.h>
  10
  11 #define EARLY_VMTRR_FLASH 6
  12
  13 static void set_early_mtrrs(void)
  14 {
  15         /* Cache the ROM to speed up booting */
  16         set_var_mtrr(EARLY_VMTRR_FLASH, OPTIMAL_CACHE_ROM_BASE,
  17                      OPTIMAL_CACHE_ROM_SIZE, MTRR_TYPE_WRPROT);
  18 }
  19
  20 void bootblock_soc_early_init(void)
  21 {
  22         bootblock_early_southbridge_init();
  23 }
  24
  25 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
  26 {
  27         enable_pci_mmconf();
  28         set_early_mtrrs();
  29
  30         if (CONFIG(UDELAY_LAPIC))
  31                 enable_lapic();
  32
  33         bootblock_main_with_basetime(base_timestamp);
  34 }
  35
  36 asmlinkage void ap_bootblock_c_entry(void)
  37 {
  38         enable_pci_mmconf();
  39         set_early_mtrrs();
  40
  41         if (CONFIG(UDELAY_LAPIC))
  42                 enable_lapic();
  43
  44         void (*ap_romstage_entry)(void) = get_ap_entry_ptr();
  45         ap_romstage_entry(); /* execution does not return */
  46         halt();
  47 }