acrn-hypervisor/hypervisor/acpi_parser/acpi_ext.c

176 lines
5.9 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
* Copyright (c) 2018 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <types.h>
#include <rtl.h>
#include "acpi.h"
#include <pgtable.h>
#include <ioapic.h>
#include <logmsg.h>
#include <host_pm.h>
#include <pci.h>
#include <acrn_common.h>
/* Per ACPI spec:
* There are two fundamental types of ACPI tables:
*
* Tables that contain AML code produced from the ACPI Source Language (ASL).
* These include the DSDT, any SSDTs, and sometimes OEM-specific tables (OEMx).
*
* Tables that contain simple data and no AML byte code. These types of tables
* are known as ACPI Data Tables. They include tables such as the FADT, MADT,
* ECDT, SRAT, etc. -essentially any table other than a DSDT or SSDT.
*
* The second type of table, the ACPI Data Table, could be parsed here.
*
* When ACRN go FuSa, the platform ACPI data should be fixed and this file is not needed.
*/
/* get a dword value from given table and its offset */
static inline uint32_t get_acpi_dt_dword(const uint8_t *dt_addr, uint32_t dt_offset)
{
return *(uint32_t *)(dt_addr + dt_offset);
}
/* get a qword value from given table and its offset */
static inline uint64_t get_acpi_dt_qword(const uint8_t *dt_addr, uint32_t dt_offset)
{
return *(uint64_t *)(dt_addr + dt_offset);
}
/* get a GAS struct from given table and its offset.
* ACPI table stores packed gas, but it is not guaranteed that
* struct acpi_generic_address is packed, so do not use memcpy in function.
* @pre dt_addr != NULL && gas != NULL
*/
static inline void get_acpi_dt_gas(const uint8_t *dt_addr, uint32_t dt_offset, struct acpi_generic_address *gas)
{
struct packed_gas *dt_gas = (struct packed_gas *)(dt_addr + dt_offset);
gas->space_id = dt_gas->space_id;
gas->bit_width = dt_gas->bit_width;
gas->bit_offset = dt_gas->bit_offset;
gas->access_size = dt_gas->access_size;
gas->address = dt_gas->address;
}
/* @pre facp_addr != NULL */
static void *get_facs_table(const uint8_t *facp_addr)
{
uint8_t *facs_addr, *facs_x_addr;
uint32_t signature, length;
struct acpi_table_header *table = (struct acpi_table_header *)facp_addr;
facs_addr = (uint8_t *)(uint64_t)get_acpi_dt_dword(facp_addr, OFFSET_FACS_ADDR);
if (table->revision >= 2U) {
facs_x_addr = (uint8_t *)get_acpi_dt_qword(facp_addr, OFFSET_FACS_X_ADDR);
if (facs_x_addr != NULL) {
facs_addr = facs_x_addr;
}
}
if (facs_addr != NULL) {
signature = get_acpi_dt_dword(facs_addr, OFFSET_FACS_SIGNATURE);
if (signature != ACPI_SIG_FACS) {
facs_addr = NULL;
} else {
length = get_acpi_dt_dword(facs_addr, OFFSET_FACS_LENGTH);
if (length < 64U) {
facs_addr = NULL;
}
}
}
return (void *)facs_addr;
}
/* @pre mcfg_addr != NULL */
static uint64_t parse_mmcfg_base(const uint8_t *mcfg_addr)
{
uint64_t base = 0UL;
uint32_t length = get_acpi_dt_dword(mcfg_addr, OFFSET_MCFG_LENGTH);
if (length > OFFSET_MCFG_ENTRY1) {
pr_fatal("Multiple PCI segment groups is not supported!");
} else {
base = get_acpi_dt_qword(mcfg_addr, OFFSET_MCFG_ENTRY0_BASE);
}
return base;
}
/* put all ACPI fix up code here */
int32_t acpi_fixup(void)
{
uint8_t *facp_addr = NULL, *facs_addr = NULL, *mcfg_addr = NULL;
uint64_t def_mmcfg_base = 0UL;
int32_t ret = 0;
struct acpi_generic_address pm1a_cnt, pm1a_evt;
struct pm_s_state_data *sx_data = get_host_sstate_data();
facp_addr = (uint8_t *)get_acpi_tbl(ACPI_SIG_FADT);
if (facp_addr != NULL) {
get_acpi_dt_gas(facp_addr, OFFSET_PM1A_EVT, &pm1a_evt);
get_acpi_dt_gas(facp_addr, OFFSET_PM1A_CNT, &pm1a_cnt);
(void)memcpy_s((void *)&sx_data->pm1a_evt, sizeof(struct acpi_generic_address),
(const void *)&pm1a_evt, sizeof(struct acpi_generic_address));
(void)memcpy_s((void *)&sx_data->pm1a_cnt, sizeof(struct acpi_generic_address),
(const void *)&pm1a_cnt, sizeof(struct acpi_generic_address));
facs_addr = (uint8_t *)get_facs_table(facp_addr);
if (facs_addr != NULL) {
sx_data->wake_vector_32 = (uint32_t *)(facs_addr + OFFSET_WAKE_VECTOR_32);
sx_data->wake_vector_64 = (uint64_t *)(facs_addr + OFFSET_WAKE_VECTOR_64);
}
const struct acpi_table_header *table = (const struct acpi_table_header *)facp_addr;
if (table->revision >= 2U) {
struct acpi_reset_reg *rr_data = get_host_reset_reg_data();
get_acpi_dt_gas(facp_addr, OFFSET_RESET_REGISTER, &(rr_data->reg));
rr_data->val = *(facp_addr + OFFSET_RESET_VALUE);
}
}
mcfg_addr = (uint8_t *)get_acpi_tbl(ACPI_SIG_MCFG);
if (mcfg_addr != NULL) {
def_mmcfg_base = parse_mmcfg_base(mcfg_addr);
set_mmcfg_base(def_mmcfg_base);
}
if ((facp_addr == NULL) || (facs_addr == NULL)
|| (mcfg_addr == NULL) || (def_mmcfg_base == 0UL)) {
ret = -1;
}
return ret;
}