From 7139284460fba90c4dfcfae76680ad36b45f5982 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Fri, 2 Feb 2007 19:48:20 +0300 Subject: ACPICA: New common routine for creating and verifying a local FADT. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/tables/tbfadt.c | 71 +++++++++++++++++++++++++++++++------------- 1 file changed, 51 insertions(+), 20 deletions(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbfadt.c b/drivers/acpi/tables/tbfadt.c index 8816bab0fe0e..31a4a00d2fd3 100644 --- a/drivers/acpi/tables/tbfadt.c +++ b/drivers/acpi/tables/tbfadt.c @@ -52,6 +52,10 @@ static void inline acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, u8 bit_width, u64 address); +static void acpi_tb_convert_fadt(void); + +static void acpi_tb_validate_fadt(void); + /* Table for conversion of FADT to common internal format and FADT validation */ typedef struct acpi_fadt_info { @@ -178,13 +182,47 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) */ (void)acpi_tb_verify_checksum(table, length); + /* Obtain 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_os_unmap_memory(table, length); + + /* Obtain the DSDT and FACS tables via their addresses within 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); +} + +/******************************************************************************* + * + * 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. + * + ******************************************************************************/ + +void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) +{ + /* - * If the FADT is larger than what we know about, we have a problem. + * Check if the FADT is larger than what we know about (ACPI 2.0 version). * Truncate the table, but make some noise. */ if (length > sizeof(struct acpi_table_fadt)) { ACPI_WARNING((AE_INFO, - "FADT (revision %u) is too large, truncating length 0x%X to 0x%X", + "FADT (revision %u) is longer than ACPI 2.0 version, truncating length 0x%X to 0x%X", table->revision, length, sizeof(struct acpi_table_fadt))); } @@ -192,27 +230,16 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) /* Copy the entire FADT locally. Zero first for tb_convert_fadt */ 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))); - /* All done with the real FADT, unmap it */ - - acpi_os_unmap_memory(table, length); - /* * 1) Convert the local copy of the FADT to the common internal format * 2) Validate some of the important values within the FADT */ acpi_tb_convert_fadt(); - acpi_tb_validate_fadt(&acpi_gbl_FADT); - - /* Obtain the DSDT and FACS tables via their addresses within 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); + acpi_tb_validate_fadt(); } /******************************************************************************* @@ -244,7 +271,7 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) * ******************************************************************************/ -void acpi_tb_convert_fadt(void) +static void acpi_tb_convert_fadt(void) { u8 pm1_register_length; struct acpi_generic_address *target; @@ -337,7 +364,7 @@ void acpi_tb_convert_fadt(void) * ******************************************************************************/ -void acpi_tb_validate_fadt(struct acpi_table_fadt *table) +static void acpi_tb_validate_fadt(void) { u32 *address32; struct acpi_generic_address *address64; @@ -351,10 +378,14 @@ void acpi_tb_validate_fadt(struct acpi_table_fadt *table) /* Generate pointers to the 32-bit and 64-bit addresses and get the length */ address64 = - ACPI_ADD_PTR(struct acpi_generic_address, table, + ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, fadt_info_table[i].target); - address32 = ACPI_ADD_PTR(u32, table, fadt_info_table[i].source); - length = *ACPI_ADD_PTR(u8, table, fadt_info_table[i].length); + address32 = + ACPI_ADD_PTR(u32, &acpi_gbl_FADT, + fadt_info_table[i].source); + length = + *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, + fadt_info_table[i].length); if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { /* -- cgit v1.2.3