src/soc/amd/genoa_poc/acpi.c

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

/* ACPI - create the Fixed ACPI Description Tables (FADT) */

#include <acpi/acpi.h>
#include <amdblocks/acpi.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/cpu.h>
#include <arch/ioapic.h>
#include <console/console.h>
#include <device/device.h>
#include <soc/acpi.h>
#include <vendorcode/amd/opensil/genoa_poc/opensil.h>

void acpi_fill_fadt(acpi_fadt_t *fadt)
{
	/* Fill in pm1_evt, pm1_cnt, pm_tmr, gpe0_blk from openSIL input structure */
	opensil_fill_fadt_io_ports(fadt);

	fadt->pm1_evt_len = 4;	/* 32 bits */
	fadt->pm1_cnt_len = 2;	/* 16 bits */
	fadt->pm_tmr_len = 4;	/* 32 bits */
	fadt->gpe0_blk_len = 8;	/* 64 bits */

	fill_fadt_extended_pm_io(fadt);

	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_FREE; /* legacy free default */
	fadt->flags |=	ACPI_FADT_WBINVD | /* See table 5-34 ACPI 6.3 spec */
			ACPI_FADT_C1_SUPPORTED |
			ACPI_FADT_S4_RTC_WAKE |
			ACPI_FADT_32BIT_TIMER |
			ACPI_FADT_PCI_EXPRESS_WAKE |
			ACPI_FADT_PLATFORM_CLOCK |
			ACPI_FADT_S4_RTC_VALID |
			ACPI_FADT_REMOTE_POWER_ON;

	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
	fadt->x_firmware_ctl_h = 0;
}

unsigned long soc_acpi_write_tables(const struct device *device, unsigned long current,
				    struct acpi_rsdp *rsdp)
{
	/* IVRS */
	acpi_ivrs_t *ivrs;
	current = acpi_align_current(current);
	ivrs = (acpi_ivrs_t *)current;
	acpi_create_ivrs(ivrs, acpi_fill_ivrs);
	current += ivrs->header.length;
	acpi_add_table(rsdp, ivrs);

	return current;
}

/* There are only the following 2 C-states reported by the reference firmware */
const acpi_cstate_t cstate_cfg_table[] = {
	[0] = {
		.ctype = 1,
		.latency = 1,
		.power = 0,
	},
	[1] = {
		.ctype = 2,
		.latency = 0x12,
		.power = 0,
	},
};

const acpi_cstate_t *get_cstate_config_data(size_t *size)
{
	*size = ARRAY_SIZE(cstate_cfg_table);
	return cstate_cfg_table;
}