v4.19.13 snapshot.
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
new file mode 100644
index 0000000..99d325a
--- /dev/null
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -0,0 +1,722 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: tbfadt - FADT table utilities
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "actables.h"
+
+#define _COMPONENT ACPI_TABLES
+ACPI_MODULE_NAME("tbfadt")
+
+/* Local prototypes */
+static void
+acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
+ u8 space_id,
+ u8 byte_width,
+ u64 address, const char *register_name, u8 flags);
+
+static void acpi_tb_convert_fadt(void);
+
+static void acpi_tb_setup_fadt_registers(void);
+
+static u64
+acpi_tb_select_address(char *register_name, u32 address32, u64 address64);
+
+/* Table for conversion of FADT to common internal format and FADT validation */
+
+typedef struct acpi_fadt_info {
+ const char *name;
+ u16 address64;
+ u16 address32;
+ u16 length;
+ u8 default_length;
+ u8 flags;
+
+} acpi_fadt_info;
+
+#define ACPI_FADT_OPTIONAL 0
+#define ACPI_FADT_REQUIRED 1
+#define ACPI_FADT_SEPARATE_LENGTH 2
+#define ACPI_FADT_GPE_REGISTER 4
+
+static struct acpi_fadt_info fadt_info_table[] = {
+ {"Pm1aEventBlock",
+ ACPI_FADT_OFFSET(xpm1a_event_block),
+ ACPI_FADT_OFFSET(pm1a_event_block),
+ ACPI_FADT_OFFSET(pm1_event_length),
+ ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
+ ACPI_FADT_REQUIRED},
+
+ {"Pm1bEventBlock",
+ ACPI_FADT_OFFSET(xpm1b_event_block),
+ ACPI_FADT_OFFSET(pm1b_event_block),
+ ACPI_FADT_OFFSET(pm1_event_length),
+ ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
+ ACPI_FADT_OPTIONAL},
+
+ {"Pm1aControlBlock",
+ ACPI_FADT_OFFSET(xpm1a_control_block),
+ ACPI_FADT_OFFSET(pm1a_control_block),
+ ACPI_FADT_OFFSET(pm1_control_length),
+ ACPI_PM1_REGISTER_WIDTH,
+ ACPI_FADT_REQUIRED},
+
+ {"Pm1bControlBlock",
+ ACPI_FADT_OFFSET(xpm1b_control_block),
+ ACPI_FADT_OFFSET(pm1b_control_block),
+ ACPI_FADT_OFFSET(pm1_control_length),
+ ACPI_PM1_REGISTER_WIDTH,
+ ACPI_FADT_OPTIONAL},
+
+ {"Pm2ControlBlock",
+ ACPI_FADT_OFFSET(xpm2_control_block),
+ ACPI_FADT_OFFSET(pm2_control_block),
+ ACPI_FADT_OFFSET(pm2_control_length),
+ ACPI_PM2_REGISTER_WIDTH,
+ ACPI_FADT_SEPARATE_LENGTH},
+
+ {"PmTimerBlock",
+ ACPI_FADT_OFFSET(xpm_timer_block),
+ ACPI_FADT_OFFSET(pm_timer_block),
+ ACPI_FADT_OFFSET(pm_timer_length),
+ ACPI_PM_TIMER_WIDTH,
+ ACPI_FADT_SEPARATE_LENGTH}, /* ACPI 5.0A: Timer is optional */
+
+ {"Gpe0Block",
+ ACPI_FADT_OFFSET(xgpe0_block),
+ ACPI_FADT_OFFSET(gpe0_block),
+ ACPI_FADT_OFFSET(gpe0_block_length),
+ 0,
+ ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},
+
+ {"Gpe1Block",
+ ACPI_FADT_OFFSET(xgpe1_block),
+ ACPI_FADT_OFFSET(gpe1_block),
+ ACPI_FADT_OFFSET(gpe1_block_length),
+ 0,
+ ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}
+};
+
+#define ACPI_FADT_INFO_ENTRIES \
+ (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
+
+/* Table used to split Event Blocks into separate status/enable registers */
+
+typedef struct acpi_fadt_pm_info {
+ struct acpi_generic_address *target;
+ u16 source;
+ u8 register_num;
+
+} acpi_fadt_pm_info;
+
+static struct acpi_fadt_pm_info fadt_pm_info_table[] = {
+ {&acpi_gbl_xpm1a_status,
+ ACPI_FADT_OFFSET(xpm1a_event_block),
+ 0},
+
+ {&acpi_gbl_xpm1a_enable,
+ ACPI_FADT_OFFSET(xpm1a_event_block),
+ 1},
+
+ {&acpi_gbl_xpm1b_status,
+ ACPI_FADT_OFFSET(xpm1b_event_block),
+ 0},
+
+ {&acpi_gbl_xpm1b_enable,
+ ACPI_FADT_OFFSET(xpm1b_event_block),
+ 1}
+};
+
+#define ACPI_FADT_PM_INFO_ENTRIES \
+ (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info))
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_init_generic_address
+ *
+ * PARAMETERS: generic_address - GAS struct to be initialized
+ * space_id - ACPI Space ID for this register
+ * byte_width - Width of this register
+ * address - Address of the register
+ * register_name - ASCII name of the ACPI register
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize a Generic Address Structure (GAS)
+ * See the ACPI specification for a full description and
+ * definition of this structure.
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
+ u8 space_id,
+ u8 byte_width,
+ u64 address, const char *register_name, u8 flags)
+{
+ u8 bit_width;
+
+ /*
+ * Bit width field in the GAS is only one byte long, 255 max.
+ * Check for bit_width overflow in GAS.
+ */
+ bit_width = (u8)(byte_width * 8);
+ if (byte_width > 31) { /* (31*8)=248, (32*8)=256 */
+ /*
+ * No error for GPE blocks, because we do not use the bit_width
+ * for GPEs, the legacy length (byte_width) is used instead to
+ * allow for a large number of GPEs.
+ */
+ if (!(flags & ACPI_FADT_GPE_REGISTER)) {
+ ACPI_ERROR((AE_INFO,
+ "%s - 32-bit FADT register is too long (%u bytes, %u bits) "
+ "to convert to GAS struct - 255 bits max, truncating",
+ register_name, byte_width,
+ (byte_width * 8)));
+ }
+
+ bit_width = 255;
+ }
+
+ /*
+ * The 64-bit Address field is non-aligned in the byte packed
+ * GAS struct.
+ */
+ ACPI_MOVE_64_TO_64(&generic_address->address, &address);
+
+ /* All other fields are byte-wide */
+
+ generic_address->space_id = space_id;
+ generic_address->bit_width = bit_width;
+ generic_address->bit_offset = 0;
+ generic_address->access_width = 0; /* Access width ANY */
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_select_address
+ *
+ * PARAMETERS: register_name - ASCII name of the ACPI register
+ * address32 - 32-bit address of the register
+ * address64 - 64-bit address of the register
+ *
+ * RETURN: The resolved 64-bit address
+ *
+ * DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within
+ * the FADT. Used for the FACS and DSDT addresses.
+ *
+ * NOTES:
+ *
+ * Check for FACS and DSDT address mismatches. An address mismatch between
+ * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
+ * DSDT/X_DSDT) could be a corrupted address field or it might indicate
+ * the presence of two FACS or two DSDT tables.
+ *
+ * November 2013:
+ * By default, as per the ACPICA specification, a valid 64-bit address is
+ * used regardless of the value of the 32-bit address. However, this
+ * behavior can be overridden via the acpi_gbl_use32_bit_fadt_addresses flag.
+ *
+ ******************************************************************************/
+
+static u64
+acpi_tb_select_address(char *register_name, u32 address32, u64 address64)
+{
+
+ if (!address64) {
+
+ /* 64-bit address is zero, use 32-bit address */
+
+ return ((u64)address32);
+ }
+
+ if (address32 && (address64 != (u64)address32)) {
+
+ /* Address mismatch between 32-bit and 64-bit versions */
+
+ ACPI_BIOS_WARNING((AE_INFO,
+ "32/64X %s address mismatch in FADT: "
+ "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
+ register_name, address32,
+ ACPI_FORMAT_UINT64(address64),
+ acpi_gbl_use32_bit_fadt_addresses ? 32 :
+ 64));
+
+ /* 32-bit address override */
+
+ if (acpi_gbl_use32_bit_fadt_addresses) {
+ return ((u64)address32);
+ }
+ }
+
+ /* Default is to use the 64-bit address */
+
+ return (address64);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_parse_fadt
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
+ * (FADT contains the addresses of the DSDT and FACS)
+ *
+ ******************************************************************************/
+
+void acpi_tb_parse_fadt(void)
+{
+ u32 length;
+ struct acpi_table_header *table;
+ struct acpi_table_desc *fadt_desc;
+ acpi_status status;
+
+ /*
+ * The FADT has multiple versions with different lengths,
+ * and it contains pointers to both the DSDT and FACS tables.
+ *
+ * Get a local copy of the FADT and convert it to a common format
+ * Map entire FADT, assumed to be smaller than one page.
+ */
+ fadt_desc = &acpi_gbl_root_table_list.tables[acpi_gbl_fadt_index];
+ status = acpi_tb_get_table(fadt_desc, &table);
+ if (ACPI_FAILURE(status)) {
+ return;
+ }
+ length = fadt_desc->length;
+
+ /*
+ * Validate the FADT checksum before we copy the table. Ignore
+ * checksum error as we want to try to get the DSDT and FACS.
+ */
+ (void)acpi_tb_verify_checksum(table, length);
+
+ /* Create a local copy of the FADT in common ACPI 2.0+ format */
+
+ acpi_tb_create_local_fadt(table, length);
+
+ /* All done with the real FADT, unmap it */
+
+ acpi_tb_put_table(fadt_desc);
+
+ /* Obtain the DSDT and FACS tables via their addresses within the FADT */
+
+ acpi_tb_install_standard_table((acpi_physical_address)acpi_gbl_FADT.
+ Xdsdt,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
+ FALSE, TRUE, &acpi_gbl_dsdt_index);
+
+ /* If Hardware Reduced flag is set, there is no FACS */
+
+ if (!acpi_gbl_reduced_hardware) {
+ if (acpi_gbl_FADT.facs) {
+ acpi_tb_install_standard_table((acpi_physical_address)
+ acpi_gbl_FADT.facs,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
+ FALSE, TRUE,
+ &acpi_gbl_facs_index);
+ }
+ if (acpi_gbl_FADT.Xfacs) {
+ acpi_tb_install_standard_table((acpi_physical_address)
+ acpi_gbl_FADT.Xfacs,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
+ FALSE, TRUE,
+ &acpi_gbl_xfacs_index);
+ }
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_create_local_fadt
+ *
+ * PARAMETERS: table - Pointer to BIOS FADT
+ * length - Length of the table
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
+ * Performs validation on some important FADT fields.
+ *
+ * NOTE: We create a local copy of the FADT regardless of the version.
+ *
+ ******************************************************************************/
+
+void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length)
+{
+ /*
+ * Check if the FADT is larger than the largest table that we expect
+ * (typically the current ACPI specification version). If so, truncate
+ * the table, and issue a warning.
+ */
+ if (length > sizeof(struct acpi_table_fadt)) {
+ ACPI_BIOS_WARNING((AE_INFO,
+ "FADT (revision %u) is longer than %s length, "
+ "truncating length %u to %u",
+ table->revision, ACPI_FADT_CONFORMANCE,
+ length,
+ (u32)sizeof(struct acpi_table_fadt)));
+ }
+
+ /* Clear the entire local FADT */
+
+ memset(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
+
+ /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */
+
+ memcpy(&acpi_gbl_FADT, table,
+ ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
+
+ /* Take a copy of the Hardware Reduced flag */
+
+ acpi_gbl_reduced_hardware = FALSE;
+ if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) {
+ acpi_gbl_reduced_hardware = TRUE;
+ }
+
+ /* Convert the local copy of the FADT to the common internal format */
+
+ acpi_tb_convert_fadt();
+
+ /* Initialize the global ACPI register structures */
+
+ acpi_tb_setup_fadt_registers();
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_convert_fadt
+ *
+ * PARAMETERS: none - acpi_gbl_FADT is used.
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Converts all versions of the FADT to a common internal format.
+ * Expand 32-bit addresses to 64-bit as necessary. Also validate
+ * important fields within the FADT.
+ *
+ * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must
+ * contain a copy of the actual BIOS-provided FADT.
+ *
+ * Notes on 64-bit register addresses:
+ *
+ * After this FADT conversion, later ACPICA code will only use the 64-bit "X"
+ * fields of the FADT for all ACPI register addresses.
+ *
+ * The 64-bit X fields are optional extensions to the original 32-bit FADT
+ * V1.0 fields. Even if they are present in the FADT, they are optional and
+ * are unused if the BIOS sets them to zero. Therefore, we must copy/expand
+ * 32-bit V1.0 fields to the 64-bit X fields if the 64-bit X field is originally
+ * zero.
+ *
+ * For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address
+ * fields are expanded to the corresponding 64-bit X fields in the internal
+ * common FADT.
+ *
+ * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded
+ * to the corresponding 64-bit X fields, if the 64-bit field is originally
+ * zero. Adhering to the ACPI specification, we completely ignore the 32-bit
+ * field if the 64-bit field is valid, regardless of whether the host OS is
+ * 32-bit or 64-bit.
+ *
+ * Possible additional checks:
+ * (acpi_gbl_FADT.pm1_event_length >= 4)
+ * (acpi_gbl_FADT.pm1_control_length >= 2)
+ * (acpi_gbl_FADT.pm_timer_length >= 4)
+ * Gpe block lengths must be multiple of 2
+ *
+ ******************************************************************************/
+
+static void acpi_tb_convert_fadt(void)
+{
+ const char *name;
+ struct acpi_generic_address *address64;
+ u32 address32;
+ u8 length;
+ u8 flags;
+ u32 i;
+
+ /*
+ * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
+ * should be zero are indeed zero. This will workaround BIOSs that
+ * inadvertently place values in these fields.
+ *
+ * The ACPI 1.0 reserved fields that will be zeroed are the bytes located
+ * at offset 45, 55, 95, and the word located at offset 109, 110.
+ *
+ * Note: The FADT revision value is unreliable. Only the length can be
+ * trusted.
+ */
+ if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
+ acpi_gbl_FADT.preferred_profile = 0;
+ acpi_gbl_FADT.pstate_control = 0;
+ acpi_gbl_FADT.cst_control = 0;
+ acpi_gbl_FADT.boot_flags = 0;
+ }
+
+ /*
+ * Now we can update the local FADT length to the length of the
+ * current FADT version as defined by the ACPI specification.
+ * Thus, we will have a common FADT internally.
+ */
+ acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
+
+ /*
+ * Expand the 32-bit DSDT addresses to 64-bit as necessary.
+ * Later ACPICA code will always use the X 64-bit field.
+ */
+ acpi_gbl_FADT.Xdsdt = acpi_tb_select_address("DSDT",
+ acpi_gbl_FADT.dsdt,
+ acpi_gbl_FADT.Xdsdt);
+
+ /* If Hardware Reduced flag is set, we are all done */
+
+ if (acpi_gbl_reduced_hardware) {
+ return;
+ }
+
+ /* Examine all of the 64-bit extended address fields (X fields) */
+
+ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
+ /*
+ * Get the 32-bit and 64-bit addresses, as well as the register
+ * length and register name.
+ */
+ address32 = *ACPI_ADD_PTR(u32,
+ &acpi_gbl_FADT,
+ fadt_info_table[i].address32);
+
+ address64 = ACPI_ADD_PTR(struct acpi_generic_address,
+ &acpi_gbl_FADT,
+ fadt_info_table[i].address64);
+
+ length = *ACPI_ADD_PTR(u8,
+ &acpi_gbl_FADT,
+ fadt_info_table[i].length);
+
+ name = fadt_info_table[i].name;
+ flags = fadt_info_table[i].flags;
+
+ /*
+ * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
+ * generic address structures as necessary. Later code will always use
+ * the 64-bit address structures.
+ *
+ * November 2013:
+ * Now always use the 64-bit address if it is valid (non-zero), in
+ * accordance with the ACPI specification which states that a 64-bit
+ * address supersedes the 32-bit version. This behavior can be
+ * overridden by the acpi_gbl_use32_bit_fadt_addresses flag.
+ *
+ * During 64-bit address construction and verification,
+ * these cases are handled:
+ *
+ * Address32 zero, Address64 [don't care] - Use Address64
+ *
+ * No override: if acpi_gbl_use32_bit_fadt_addresses is FALSE, and:
+ * Address32 non-zero, Address64 zero - Copy/use Address32
+ * Address32 non-zero == Address64 non-zero - Use Address64
+ * Address32 non-zero != Address64 non-zero - Warning, use Address64
+ *
+ * Override: if acpi_gbl_use32_bit_fadt_addresses is TRUE, and:
+ * Address32 non-zero, Address64 zero - Copy/use Address32
+ * Address32 non-zero == Address64 non-zero - Copy/use Address32
+ * Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
+ *
+ * Note: space_id is always I/O for 32-bit legacy address fields
+ */
+ if (address32) {
+ if (address64->address) {
+ if (address64->address != (u64)address32) {
+
+ /* Address mismatch */
+
+ ACPI_BIOS_WARNING((AE_INFO,
+ "32/64X address mismatch in FADT/%s: "
+ "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
+ name, address32,
+ ACPI_FORMAT_UINT64
+ (address64->address),
+ acpi_gbl_use32_bit_fadt_addresses
+ ? 32 : 64));
+ }
+
+ /*
+ * For each extended field, check for length mismatch
+ * between the legacy length field and the corresponding
+ * 64-bit X length field.
+ * Note: If the legacy length field is > 0xFF bits, ignore
+ * this check. (GPE registers can be larger than the
+ * 64-bit GAS structure can accomodate, 0xFF bits).
+ */
+ if ((ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
+ (address64->bit_width !=
+ ACPI_MUL_8(length))) {
+ ACPI_BIOS_WARNING((AE_INFO,
+ "32/64X length mismatch in FADT/%s: %u/%u",
+ name,
+ ACPI_MUL_8(length),
+ address64->
+ bit_width));
+ }
+ }
+
+ /*
+ * Hardware register access code always uses the 64-bit fields.
+ * So if the 64-bit field is zero or is to be overridden,
+ * initialize it with the 32-bit fields.
+ * Note that when the 32-bit address favor is specified, the
+ * 64-bit fields are always re-initialized so that
+ * access_size/bit_width/bit_offset fields can be correctly
+ * configured to the values to trigger a 32-bit compatible
+ * access mode in the hardware register access code.
+ */
+ if (!address64->address
+ || acpi_gbl_use32_bit_fadt_addresses) {
+ acpi_tb_init_generic_address(address64,
+ ACPI_ADR_SPACE_SYSTEM_IO,
+ length,
+ (u64)address32,
+ name, flags);
+ }
+ }
+
+ if (fadt_info_table[i].flags & ACPI_FADT_REQUIRED) {
+ /*
+ * Field is required (Pm1a_event, Pm1a_control).
+ * Both the address and length must be non-zero.
+ */
+ if (!address64->address || !length) {
+ ACPI_BIOS_ERROR((AE_INFO,
+ "Required FADT field %s has zero address and/or length: "
+ "0x%8.8X%8.8X/0x%X",
+ name,
+ ACPI_FORMAT_UINT64(address64->
+ address),
+ length));
+ }
+ } else if (fadt_info_table[i].flags & ACPI_FADT_SEPARATE_LENGTH) {
+ /*
+ * Field is optional (Pm2_control, GPE0, GPE1) AND has its own
+ * length field. If present, both the address and length must
+ * be valid.
+ */
+ if ((address64->address && !length) ||
+ (!address64->address && length)) {
+ ACPI_BIOS_WARNING((AE_INFO,
+ "Optional FADT field %s has valid %s but zero %s: "
+ "0x%8.8X%8.8X/0x%X", name,
+ (length ? "Length" :
+ "Address"),
+ (length ? "Address" :
+ "Length"),
+ ACPI_FORMAT_UINT64
+ (address64->address),
+ length));
+ }
+ }
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_setup_fadt_registers
+ *
+ * PARAMETERS: None, uses acpi_gbl_FADT.
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
+ * force FADT register definitions to their default lengths.
+ *
+ ******************************************************************************/
+
+static void acpi_tb_setup_fadt_registers(void)
+{
+ struct acpi_generic_address *target64;
+ struct acpi_generic_address *source64;
+ u8 pm1_register_byte_width;
+ u32 i;
+
+ /*
+ * Optionally check all register lengths against the default values and
+ * update them if they are incorrect.
+ */
+ if (acpi_gbl_use_default_register_widths) {
+ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
+ target64 =
+ ACPI_ADD_PTR(struct acpi_generic_address,
+ &acpi_gbl_FADT,
+ fadt_info_table[i].address64);
+
+ /*
+ * If a valid register (Address != 0) and the (default_length > 0)
+ * (Not a GPE register), then check the width against the default.
+ */
+ if ((target64->address) &&
+ (fadt_info_table[i].default_length > 0) &&
+ (fadt_info_table[i].default_length !=
+ target64->bit_width)) {
+ ACPI_BIOS_WARNING((AE_INFO,
+ "Invalid length for FADT/%s: %u, using default %u",
+ fadt_info_table[i].name,
+ target64->bit_width,
+ fadt_info_table[i].
+ default_length));
+
+ /* Incorrect size, set width to the default */
+
+ target64->bit_width =
+ fadt_info_table[i].default_length;
+ }
+ }
+ }
+
+ /*
+ * Get the length of the individual PM1 registers (enable and status).
+ * Each register is defined to be (event block length / 2). Extra divide
+ * by 8 converts bits to bytes.
+ */
+ pm1_register_byte_width = (u8)
+ ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
+
+ /*
+ * Calculate separate GAS structs for the PM1x (A/B) Status and Enable
+ * registers. These addresses do not appear (directly) in the FADT, so it
+ * is useful to pre-calculate them from the PM1 Event Block definitions.
+ *
+ * The PM event blocks are split into two register blocks, first is the
+ * PM Status Register block, followed immediately by the PM Enable
+ * Register block. Each is of length (pm1_event_length/2)
+ *
+ * Note: The PM1A event block is required by the ACPI specification.
+ * However, the PM1B event block is optional and is rarely, if ever,
+ * used.
+ */
+
+ for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
+ source64 =
+ ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
+ fadt_pm_info_table[i].source);
+
+ if (source64->address) {
+ acpi_tb_init_generic_address(fadt_pm_info_table[i].
+ target, source64->space_id,
+ pm1_register_byte_width,
+ source64->address +
+ (fadt_pm_info_table[i].
+ register_num *
+ pm1_register_byte_width),
+ "PmRegisters", 0);
+ }
+ }
+}