/* SPDX-License-Identifier: GPL-2.0-only */

#include <acpi/acpi.h>
#include <cpu/x86/smm.h>
#include <soc/acpi.h>
#include <soc/iomap.h>
#include <soc/pm.h>
#include "chip.h"

void acpi_fill_fadt(acpi_fadt_t *fadt)
{
	const uint16_t pmbase = ACPI_BASE_ADDRESS;

	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 + PM2A_CNT_BLK;
	fadt->pm_tmr_blk = pmbase + PM1_TMR;
	fadt->gpe0_blk = pmbase + GPE0_STS;

	fadt->pm1_evt_len = 4;
	fadt->pm1_cnt_len = 2;
	fadt->pm2_cnt_len = 1;
	fadt->pm_tmr_len = 4;
	fadt->gpe0_blk_len = 2 * (GPE0_EN - GPE0_STS);
	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;

	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 = fadt->pm1a_evt_blk;
	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 = fadt->pm1a_cnt_blk;
	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 = fadt->pm2_cnt_blk;
	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 = fadt->pm_tmr_blk;
	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;
}