--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: tbfadt - FADT table utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2006, R. Byron Moore
+ * 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,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+#define _COMPONENT ACPI_TABLES
+ACPI_MODULE_NAME("tbfadt")
+
+/* Local prototypes */
+static void inline
+acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
+ u8 bit_width, u64 address);
+
+static void acpi_tb_fadt_register_error(char *register_name, u32 value);
+
+static void acpi_tb_convert_fadt(void);
+
+static void acpi_tb_validate_fadt(void);
+
+/* Table used for conversion of FADT to common format */
+
+typedef struct acpi_fadt_conversion {
+ u8 target;
+ u8 source;
+ u8 length;
+
+} acpi_fadt_conversion;
+
+static struct acpi_fadt_conversion fadt_conversion_table[] = {
+ {ACPI_FADT_OFFSET(xpm1a_event_block),
+ ACPI_FADT_OFFSET(pm1a_event_block),
+ ACPI_FADT_OFFSET(pm1_event_length)},
+ {ACPI_FADT_OFFSET(xpm1b_event_block),
+ ACPI_FADT_OFFSET(pm1b_event_block),
+ ACPI_FADT_OFFSET(pm1_event_length)},
+ {ACPI_FADT_OFFSET(xpm1a_control_block),
+ ACPI_FADT_OFFSET(pm1a_control_block),
+ ACPI_FADT_OFFSET(pm1_control_length)},
+ {ACPI_FADT_OFFSET(xpm1b_control_block),
+ ACPI_FADT_OFFSET(pm1b_control_block),
+ ACPI_FADT_OFFSET(pm1_control_length)},
+ {ACPI_FADT_OFFSET(xpm2_control_block),
+ ACPI_FADT_OFFSET(pm2_control_block),
+ ACPI_FADT_OFFSET(pm2_control_length)},
+ {ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block),
+ ACPI_FADT_OFFSET(pm_timer_length)},
+ {ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block),
+ ACPI_FADT_OFFSET(gpe0_block_length)},
+ {ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block),
+ ACPI_FADT_OFFSET(gpe1_block_length)}
+};
+
+#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion))
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_init_generic_address
+ *
+ * PARAMETERS: new_gas_struct - GAS struct to be initialized
+ * bit_width - Width of this register
+ * Address - Address of the register
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize a GAS structure.
+ *
+ ******************************************************************************/
+
+static void inline
+acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
+ u8 bit_width, u64 address)
+{
+
+ ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
+ new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
+ new_gas_struct->bit_width = bit_width;
+ new_gas_struct->bit_offset = 0;
+ new_gas_struct->access_width = 0;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_parse_fadt
+ *
+ * PARAMETERS: table_index - Index for the FADT
+ * Flags - Flags
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
+ * (FADT contains the addresses of the DSDT and FACS)
+ *
+ ******************************************************************************/
+
+void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
+{
+ u32 length;
+ struct acpi_table_header *table;
+
+ /*
+ * Special case for the FADT because of multiple versions and the fact
+ * that 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.
+ */
+ length = acpi_gbl_root_table_list.tables[table_index].length;
+
+ table =
+ acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
+ address, length);
+ if (!table) {
+ return;
+ }
+
+ /*
+ * 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);
+
+ /* Copy the entire FADT locally */
+
+ ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
+
+ ACPI_MEMCPY(&acpi_gbl_FADT, table,
+ ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
+ acpi_os_unmap_memory(table, length);
+
+ /* Convert local FADT to the common internal format */
+
+ acpi_tb_convert_fadt();
+
+ /* Extract the DSDT and FACS tables from the FADT */
+
+ acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
+ flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
+
+ acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
+ flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
+
+ /* Validate important FADT values */
+
+ acpi_tb_validate_fadt();
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_convert_fadt
+ *
+ * PARAMETERS: None, uses acpi_gbl_FADT
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Converts all versions of the FADT to a common internal format.
+ *
+ * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must contain
+ * a copy of the actual FADT.
+ *
+ * ACPICA will use the "X" fields of the FADT for all addresses.
+ *
+ * "X" fields are optional extensions to the original V1.0 fields. Even if
+ * they are present in the structure, they can be optionally not used by
+ * setting them to zero. Therefore, we must selectively expand V1.0 fields
+ * if the corresponding X field is zero.
+ *
+ * For ACPI 1.0 FADTs, all address fields are expanded to the corresponding
+ * "X" fields.
+ *
+ * For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by
+ * expanding the corresponding ACPI 1.0 field.
+ *
+ ******************************************************************************/
+
+static void acpi_tb_convert_fadt(void)
+{
+ u8 pm1_register_length;
+ struct acpi_generic_address *target;
+ acpi_native_uint i;
+
+ /* Expand the FACS and DSDT addresses as necessary */
+
+ if (!acpi_gbl_FADT.Xfacs) {
+ acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
+ }
+
+ if (!acpi_gbl_FADT.Xdsdt) {
+ acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
+ }
+
+ /*
+ * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
+ * structures as necessary.
+ */
+ for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) {
+ target =
+ ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
+ fadt_conversion_table[i].target);
+
+ /* Expand only if the X target is null */
+
+ if (!target->address) {
+ acpi_tb_init_generic_address(target,
+ *ACPI_ADD_PTR(u8,
+ &acpi_gbl_FADT,
+ fadt_conversion_table
+ [i].length),
+ (u64) * ACPI_ADD_PTR(u32,
+ &acpi_gbl_FADT,
+ fadt_conversion_table
+ [i].
+ source));
+ }
+ }
+
+ /*
+ * Calculate separate GAS structs for the PM1 Enable registers.
+ * These addresses do not appear (directly) in the FADT, so it is
+ * useful to calculate them once, here.
+ *
+ * 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)
+ */
+ pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
+
+ /* PM1A is required */
+
+ acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
+ pm1_register_length,
+ (acpi_gbl_FADT.xpm1a_event_block.address +
+ pm1_register_length));
+
+ /* PM1B is optional; leave null if not present */
+
+ if (acpi_gbl_FADT.xpm1b_event_block.address) {
+ acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
+ pm1_register_length,
+ (acpi_gbl_FADT.xpm1b_event_block.
+ address + pm1_register_length));
+ }
+
+ /* Global FADT is the new common V2.0 FADT */
+
+ acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_tb_validate_fadt
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Validate various ACPI registers in the FADT
+ *
+ ******************************************************************************/
+
+static void acpi_tb_validate_fadt(void)
+{
+
+ /* These length fields have a minimum value */
+
+ if (acpi_gbl_FADT.pm1_event_length < 4) {
+ acpi_tb_fadt_register_error("Pm1EventLength",
+ (u32) acpi_gbl_FADT.
+ pm1_event_length);
+ }
+
+ if (acpi_gbl_FADT.pm_timer_length < 4) {
+ acpi_tb_fadt_register_error("PmTimerLength",
+ (u32) acpi_gbl_FADT.
+ pm_timer_length);
+ }
+
+ /* These length and address fields must be non-zero */
+
+ if (!acpi_gbl_FADT.pm1_control_length) {
+ acpi_tb_fadt_register_error("Pm1ControlLength", 0);
+ }
+
+ if (!acpi_gbl_FADT.xpm1a_event_block.address) {
+ acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0);
+ }
+
+ if (!acpi_gbl_FADT.xpm1a_control_block.address) {
+ acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0);
+ }
+
+ if (!acpi_gbl_FADT.xpm_timer_block.address) {
+ acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0);
+ }
+
+ /* If PM2 block is present, must have non-zero length */
+
+ if ((acpi_gbl_FADT.xpm2_control_block.address &&
+ !acpi_gbl_FADT.pm2_control_length)) {
+ acpi_tb_fadt_register_error("Pm2ControlLength",
+ (u32) acpi_gbl_FADT.
+ pm2_control_length);
+ }
+
+ /* Length of any valid GPE blocks must be a multiple of 2 */
+
+ if (acpi_gbl_FADT.xgpe0_block.address &&
+ (acpi_gbl_FADT.gpe0_block_length & 1)) {
+ acpi_tb_fadt_register_error("Gpe0BlockLength",
+ (u32) acpi_gbl_FADT.
+ gpe0_block_length);
+ }
+
+ if (acpi_gbl_FADT.xgpe1_block.address &&
+ (acpi_gbl_FADT.gpe1_block_length & 1)) {
+ acpi_tb_fadt_register_error("Gpe1BlockLength",
+ (u32) acpi_gbl_FADT.
+ gpe1_block_length);
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_fadt_register_error
+ *
+ * PARAMETERS: register_name - Pointer to string identifying register
+ * Value - Actual register contents value
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Display FADT warning message
+ *
+ ******************************************************************************/
+
+static void acpi_tb_fadt_register_error(char *register_name, u32 value)
+{
+
+ ACPI_WARNING((AE_INFO, "Invalid FADT value \"%s\" = %X",
+ register_name, value));
+}
projects / platform / kernel / linux-rpi.git / commitdiff