fadt.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/pci_ops.h>
#include <acpi/acpi.h>
#include <cpu/x86/smm.h>
#include <southbridge/intel/lynxpoint/pch.h>
#include "chip.h"
 
void acpi_fill_fadt(acpi_fadt_t *fadt)
{
        struct device *dev = pcidev_on_root(0x1f, 0);
        struct southbridge_intel_lynxpoint_config *cfg = dev->chip_info;
        u16 pmbase = get_pmbase();
 
        fadt->sci_int = 0x9;
 
        if (permanent_smi_handler()) {
                fadt->smi_cmd = APM_CNT;
                fadt->acpi_enable = APM_CNT_ACPI_ENABLE;
                fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
        }
 
        fadt->pm1a_evt_blk = pmbase + PM1_STS;
        fadt->pm1a_cnt_blk = pmbase + PM1_CNT;
        fadt->pm2_cnt_blk = pmbase + PM2_CNT;
        fadt->pm_tmr_blk = pmbase + PM1_TMR;
        if (pch_is_lp())
                fadt->gpe0_blk = pmbase + LP_GPE0_STS_1;
        else
                fadt->gpe0_blk = pmbase + GPE0_STS;
 
        /*
         * Some of the lengths here are doubled. This is because they describe
         * blocks containing two registers, where the size of each register
         * is found by halving the block length. See Table 5-34 and section
         * 4.8.3 of the ACPI specification for details.
         */
        fadt->pm1_evt_len = 2 * 2;
        fadt->pm1_cnt_len = 2;
        fadt->pm2_cnt_len = 1;
        fadt->pm_tmr_len = 4;
        if (pch_is_lp())
                fadt->gpe0_blk_len = 2 * 16;
        else
                fadt->gpe0_blk_len = 2 * 8;
 
        /* P_LVLx not used */
        fadt->p_lvl2_lat = 101;
        fadt->p_lvl3_lat = 1001;
        fadt->duty_offset = 0;
        fadt->duty_width = 0;
        fadt->day_alrm = 0xd;
        fadt->mon_alrm = 0x00;
        fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
 
        fadt->flags |= ACPI_FADT_WBINVD |
                       ACPI_FADT_C1_SUPPORTED |
                       ACPI_FADT_SLEEP_BUTTON |
                       ACPI_FADT_SEALED_CASE |
                       ACPI_FADT_S4_RTC_WAKE |
                       ACPI_FADT_PLATFORM_CLOCK;
 
        if (cfg && cfg->docking_supported)
                fadt->flags |= ACPI_FADT_DOCKING_SUPPORTED;
 
        fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
        fadt->x_pm1a_evt_blk.bit_width = fadt->pm1_evt_len * 8;
        fadt->x_pm1a_evt_blk.bit_offset = 0;
        fadt->x_pm1a_evt_blk.access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
        fadt->x_pm1a_evt_blk.addrl = pmbase + PM1_STS;
        fadt->x_pm1a_evt_blk.addrh = 0x0;
 
        fadt->x_pm1a_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
        fadt->x_pm1a_cnt_blk.bit_width = fadt->pm1_cnt_len * 8;
        fadt->x_pm1a_cnt_blk.bit_offset = 0;
        fadt->x_pm1a_cnt_blk.access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
        fadt->x_pm1a_cnt_blk.addrl = pmbase + PM1_CNT;
        fadt->x_pm1a_cnt_blk.addrh = 0x0;
 
        fadt->x_pm2_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
        fadt->x_pm2_cnt_blk.bit_width = fadt->pm2_cnt_len * 8;
        fadt->x_pm2_cnt_blk.bit_offset = 0;
        fadt->x_pm2_cnt_blk.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
        fadt->x_pm2_cnt_blk.addrl = pmbase + PM2_CNT;
        fadt->x_pm2_cnt_blk.addrh = 0x0;
 
        fadt->x_pm_tmr_blk.space_id = ACPI_ADDRESS_SPACE_IO;
        fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
        fadt->x_pm_tmr_blk.bit_offset = 0;
        fadt->x_pm_tmr_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
        fadt->x_pm_tmr_blk.addrl = pmbase + PM1_TMR;
        fadt->x_pm_tmr_blk.addrh = 0x0;
 
        /*
         * Windows 10 requires x_gpe0_blk to be set starting with FADT revision 5.
         * The bit_width field intentionally overflows here.
         * The OSPM can instead use the values in `fadt->gpe0_blk{,_len}`, which
         * seems to work fine on Linux 5.0 and Windows 10.
         */
        fadt->x_gpe0_blk.space_id = ACPI_ADDRESS_SPACE_IO;
        fadt->x_gpe0_blk.bit_width = fadt->gpe0_blk_len * 8;
        fadt->x_gpe0_blk.bit_offset = 0;
        fadt->x_gpe0_blk.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
        fadt->x_gpe0_blk.addrl = fadt->gpe0_blk;
        fadt->x_gpe0_blk.addrh = 0x0;
}