src/arch/x86/acpi.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <arch/ioapic.h>
   5 #include <cf9_reset.h>
   6 #include <cpu/x86/smm.h>
   7 #include <pc80/mc146818rtc.h>
   8
   9 static u16 acpi_sci_int(void)
  10 {
  11         u8 gsi, irq, flags;
  12
  13         ioapic_get_sci_pin(&gsi, &irq, &flags);
  14
  15         /* In systems without 8259, the SCI_INT field in the FADT contains the SCI GSI number
  16            instead of the 8259 IRQ number */
  17         if (!CONFIG(ACPI_HAVE_PCAT_8259))
  18                 return gsi;
  19
  20         assert(irq < 16);
  21         return irq;
  22 }
  23
  24
  25 void arch_fill_fadt(acpi_fadt_t *fadt)
  26 {
  27         fadt->sci_int = acpi_sci_int();
  28
  29         if (CONFIG(HAVE_CF9_RESET)) {
  30                 fadt->reset_reg.space_id = ACPI_ADDRESS_SPACE_IO;
  31                 fadt->reset_reg.bit_width = 8;
  32                 fadt->reset_reg.bit_offset = 0;
  33                 fadt->reset_reg.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
  34                 fadt->reset_reg.addrl = RST_CNT;
  35                 fadt->reset_reg.addrh = 0;
  36
  37                 fadt->reset_value = RST_CPU | SYS_RST;
  38
  39                 fadt->flags |= ACPI_FADT_RESET_REGISTER;
  40         }
  41
  42         if (permanent_smi_handler()) {
  43                 fadt->smi_cmd = pm_acpi_smi_cmd_port();
  44                 fadt->acpi_enable = APM_CNT_ACPI_ENABLE;
  45                 fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
  46         }
  47
  48         if (CONFIG(PC80_SYSTEM)) {
  49                 /* Currently these are defined to support date alarm only. */
  50                 fadt->day_alrm = RTC_DATE_ALARM;
  51                 fadt->mon_alrm = RTC_MONTH_ALARM;
  52         }
  53
  54         /* Careful with USE_OPTION_TABLE. */
  55         if (CONFIG(USE_PC_CMOS_ALTCENTURY))
  56                 fadt->century = RTC_CLK_ALTCENTURY;
  57 }