src/soc/intel/braswell/fadt.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <cpu/x86/smm.h>
   5 #include <soc/acpi.h>
   6 #include <soc/iomap.h>
   7 #include <soc/pm.h>
   8 #include "chip.h"
   9
  10 void acpi_fill_fadt(acpi_fadt_t *fadt)
  11 {
  12         const uint16_t pmbase = ACPI_BASE_ADDRESS;
  13
  14
  15         fadt->pm1a_evt_blk = pmbase + PM1_STS;
  16         fadt->pm1a_cnt_blk = pmbase + PM1_CNT;
  17         fadt->pm2_cnt_blk = pmbase + PM2A_CNT_BLK;
  18         fadt->pm_tmr_blk = pmbase + PM1_TMR;
  19         fadt->gpe0_blk = pmbase + GPE0_STS;
  20
  21         fadt->pm1_evt_len = 4;
  22         fadt->pm1_cnt_len = 2;
  23         fadt->pm2_cnt_len = 1;
  24         fadt->pm_tmr_len = 4;
  25         fadt->gpe0_blk_len = 2 * (GPE0_EN - GPE0_STS);
  26         fadt->day_alrm = 0xd;
  27         fadt->mon_alrm = 0x00;
  28         fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
  29
  30         fadt->flags |= ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED |
  31                         ACPI_FADT_SLEEP_BUTTON |
  32                         ACPI_FADT_SEALED_CASE | ACPI_FADT_S4_RTC_WAKE |
  33                         ACPI_FADT_PLATFORM_CLOCK;
  34
  35         fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
  36         fadt->x_pm1a_evt_blk.bit_width = fadt->pm1_evt_len * 8;
  37         fadt->x_pm1a_evt_blk.bit_offset = 0;
  38         fadt->x_pm1a_evt_blk.access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
  39         fadt->x_pm1a_evt_blk.addrl = fadt->pm1a_evt_blk;
  40         fadt->x_pm1a_evt_blk.addrh = 0x0;
  41
  42         fadt->x_pm1a_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
  43         fadt->x_pm1a_cnt_blk.bit_width = fadt->pm1_cnt_len * 8;
  44         fadt->x_pm1a_cnt_blk.bit_offset = 0;
  45         fadt->x_pm1a_cnt_blk.access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
  46         fadt->x_pm1a_cnt_blk.addrl = fadt->pm1a_cnt_blk;
  47         fadt->x_pm1a_cnt_blk.addrh = 0x0;
  48
  49         fadt->x_pm2_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
  50         fadt->x_pm2_cnt_blk.bit_width = fadt->pm2_cnt_len * 8;
  51         fadt->x_pm2_cnt_blk.bit_offset = 0;
  52         fadt->x_pm2_cnt_blk.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
  53         fadt->x_pm2_cnt_blk.addrl = fadt->pm2_cnt_blk;
  54         fadt->x_pm2_cnt_blk.addrh = 0x0;
  55
  56         fadt->x_pm_tmr_blk.space_id = ACPI_ADDRESS_SPACE_IO;
  57         fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
  58         fadt->x_pm_tmr_blk.bit_offset = 0;
  59         fadt->x_pm_tmr_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
  60         fadt->x_pm_tmr_blk.addrl = fadt->pm_tmr_blk;
  61         fadt->x_pm_tmr_blk.addrh = 0x0;
  62
  63         /*
  64          * Windows 10 requires x_gpe0_blk to be set starting with FADT revision 5.
  65          * The bit_width field intentionally overflows here.
  66          * The OSPM can instead use the values in `fadt->gpe0_blk{,_len}`, which
  67          * seems to work fine on Linux 5.0 and Windows 10.
  68          */
  69         fadt->x_gpe0_blk.space_id = ACPI_ADDRESS_SPACE_IO;
  70         fadt->x_gpe0_blk.bit_width = fadt->gpe0_blk_len * 8;
  71         fadt->x_gpe0_blk.bit_offset = 0;
  72         fadt->x_gpe0_blk.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
  73         fadt->x_gpe0_blk.addrl = fadt->gpe0_blk;
  74         fadt->x_gpe0_blk.addrh = 0x0;
  75 }