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ACPICA: New common routine for creating and verifying a local FADT.

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Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2007-02-02 19:48:20 +03:00 committed by Len Brown
parent 13b572a35e
commit 7139284460
2 changed files with 59 additions and 30 deletions
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85
drivers/acpi/tables/tbfadt.c
View File

@ -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 {
@ -178,34 +182,14 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
*/
(void)acpi_tb_verify_checksum(table, length);
/*
* If the FADT is larger than what we know about, we have a problem.
* 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",
table->revision, length,
sizeof(struct acpi_table_fadt)));
}
/* Obtain a local copy of the FADT in common ACPI 2.0+ format */
/* 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)));
acpi_tb_create_local_fadt(table, length);
/* 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,
@ -215,6 +199,49 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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)
{
/*
* 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 longer than ACPI 2.0 version, truncating length 0x%X to 0x%X",
table->revision, length,
sizeof(struct acpi_table_fadt)));
}
/* 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)));
/*
* 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();
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_convert_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) {
/*

4
include/acpi/actables.h
View File

@ -51,9 +51,7 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count);
*/
void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags);
void acpi_tb_convert_fadt(void);
void acpi_tb_validate_fadt(struct acpi_table_fadt *table);
void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length);
/*
* tbfind - find ACPI table