mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 20:56:23 +00:00
4fdb2a05ef
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Len Brown <len.brown@intel.com>
558 lines
16 KiB
C
558 lines
16 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: tbutils - table utilities
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2007, 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("tbutils")
|
|
|
|
/* Local prototypes */
|
|
static acpi_physical_address
|
|
acpi_tb_get_root_table_entry(u8 * table_entry,
|
|
acpi_native_uint table_entry_size);
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_check_xsdt
|
|
*
|
|
* PARAMETERS: address - Pointer to the XSDT
|
|
*
|
|
* RETURN: status
|
|
* AE_OK - XSDT is okay
|
|
* AE_NO_MEMORY - can't map XSDT
|
|
* AE_INVALID_TABLE_LENGTH - invalid table length
|
|
* AE_NULL_ENTRY - XSDT has NULL entry
|
|
*
|
|
* DESCRIPTION: validate XSDT
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_tb_check_xsdt(acpi_physical_address address)
|
|
{
|
|
struct acpi_table_header *table;
|
|
u32 length;
|
|
u64 xsdt_entry_address;
|
|
u8 *table_entry;
|
|
u32 table_count;
|
|
int i;
|
|
|
|
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
|
|
if (!table)
|
|
return AE_NO_MEMORY;
|
|
|
|
length = table->length;
|
|
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
|
|
if (length < sizeof(struct acpi_table_header))
|
|
return AE_INVALID_TABLE_LENGTH;
|
|
|
|
table = acpi_os_map_memory(address, length);
|
|
if (!table)
|
|
return AE_NO_MEMORY;
|
|
|
|
/* Calculate the number of tables described in XSDT */
|
|
table_count =
|
|
(u32) ((table->length -
|
|
sizeof(struct acpi_table_header)) / sizeof(u64));
|
|
table_entry =
|
|
ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
|
|
for (i = 0; i < table_count; i++) {
|
|
ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry);
|
|
if (!xsdt_entry_address) {
|
|
/* XSDT has NULL entry */
|
|
break;
|
|
}
|
|
table_entry += sizeof(u64);
|
|
}
|
|
acpi_os_unmap_memory(table, length);
|
|
|
|
if (i < table_count)
|
|
return AE_NULL_ENTRY;
|
|
else
|
|
return AE_OK;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_tables_loaded
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: TRUE if required ACPI tables are loaded
|
|
*
|
|
* DESCRIPTION: Determine if the minimum required ACPI tables are present
|
|
* (FADT, FACS, DSDT)
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_tb_tables_loaded(void)
|
|
{
|
|
|
|
if (acpi_gbl_root_table_list.count >= 3) {
|
|
return (TRUE);
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_print_table_header
|
|
*
|
|
* PARAMETERS: Address - Table physical address
|
|
* Header - Table header
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_tb_print_table_header(acpi_physical_address address,
|
|
struct acpi_table_header *header)
|
|
{
|
|
|
|
if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) {
|
|
|
|
/* FACS only has signature and length fields of common table header */
|
|
|
|
ACPI_INFO((AE_INFO, "%4.4s %08lX, %04X",
|
|
header->signature, (unsigned long)address,
|
|
header->length));
|
|
} else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) {
|
|
|
|
/* RSDP has no common fields */
|
|
|
|
ACPI_INFO((AE_INFO, "RSDP %08lX, %04X (r%d %6.6s)",
|
|
(unsigned long)address,
|
|
(ACPI_CAST_PTR(struct acpi_table_rsdp, header)->
|
|
revision >
|
|
0) ? ACPI_CAST_PTR(struct acpi_table_rsdp,
|
|
header)->length : 20,
|
|
ACPI_CAST_PTR(struct acpi_table_rsdp,
|
|
header)->revision,
|
|
ACPI_CAST_PTR(struct acpi_table_rsdp,
|
|
header)->oem_id));
|
|
} else {
|
|
/* Standard ACPI table with full common header */
|
|
|
|
ACPI_INFO((AE_INFO,
|
|
"%4.4s %08lX, %04X (r%d %6.6s %8.8s %8X %4.4s %8X)",
|
|
header->signature, (unsigned long)address,
|
|
header->length, header->revision, header->oem_id,
|
|
header->oem_table_id, header->oem_revision,
|
|
header->asl_compiler_id,
|
|
header->asl_compiler_revision));
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_validate_checksum
|
|
*
|
|
* PARAMETERS: Table - ACPI table to verify
|
|
* Length - Length of entire table
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
|
|
* exception on bad checksum.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
|
|
{
|
|
u8 checksum;
|
|
|
|
/* Compute the checksum on the table */
|
|
|
|
checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);
|
|
|
|
/* Checksum ok? (should be zero) */
|
|
|
|
if (checksum) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X",
|
|
table->signature, table->checksum,
|
|
(u8) (table->checksum - checksum)));
|
|
|
|
#if (ACPI_CHECKSUM_ABORT)
|
|
|
|
return (AE_BAD_CHECKSUM);
|
|
#endif
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_checksum
|
|
*
|
|
* PARAMETERS: Buffer - Pointer to memory region to be checked
|
|
* Length - Length of this memory region
|
|
*
|
|
* RETURN: Checksum (u8)
|
|
*
|
|
* DESCRIPTION: Calculates circular checksum of memory region.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length)
|
|
{
|
|
u8 sum = 0;
|
|
u8 *end = buffer + length;
|
|
|
|
while (buffer < end) {
|
|
sum = (u8) (sum + *(buffer++));
|
|
}
|
|
|
|
return sum;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_install_table
|
|
*
|
|
* PARAMETERS: Address - Physical address of DSDT or FACS
|
|
* Flags - Flags
|
|
* Signature - Table signature, NULL if no need to
|
|
* match
|
|
* table_index - Index into root table array
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Install an ACPI table into the global data structure.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_tb_install_table(acpi_physical_address address,
|
|
u8 flags, char *signature, acpi_native_uint table_index)
|
|
{
|
|
struct acpi_table_header *table;
|
|
|
|
if (!address) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Null physical address for ACPI table [%s]",
|
|
signature));
|
|
return;
|
|
}
|
|
|
|
/* Map just the table header */
|
|
|
|
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
|
|
if (!table) {
|
|
return;
|
|
}
|
|
|
|
/* If a particular signature is expected, signature must match */
|
|
|
|
if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Invalid signature 0x%X for ACPI table [%s]",
|
|
*ACPI_CAST_PTR(u32, table->signature), signature));
|
|
goto unmap_and_exit;
|
|
}
|
|
|
|
/* Initialize the table entry */
|
|
|
|
acpi_gbl_root_table_list.tables[table_index].address = address;
|
|
acpi_gbl_root_table_list.tables[table_index].length = table->length;
|
|
acpi_gbl_root_table_list.tables[table_index].flags = flags;
|
|
|
|
ACPI_MOVE_32_TO_32(&
|
|
(acpi_gbl_root_table_list.tables[table_index].
|
|
signature), table->signature);
|
|
|
|
acpi_tb_print_table_header(address, table);
|
|
|
|
if (table_index == ACPI_TABLE_INDEX_DSDT) {
|
|
|
|
/* Global integer width is based upon revision of the DSDT */
|
|
|
|
acpi_ut_set_integer_width(table->revision);
|
|
}
|
|
|
|
unmap_and_exit:
|
|
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_get_root_table_entry
|
|
*
|
|
* PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry
|
|
* table_entry_size - sizeof 32 or 64 (RSDT or XSDT)
|
|
*
|
|
* RETURN: Physical address extracted from the root table
|
|
*
|
|
* DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on
|
|
* both 32-bit and 64-bit platforms
|
|
*
|
|
* NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on
|
|
* 64-bit platforms.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_physical_address
|
|
acpi_tb_get_root_table_entry(u8 * table_entry,
|
|
acpi_native_uint table_entry_size)
|
|
{
|
|
u64 address64;
|
|
|
|
/*
|
|
* Get the table physical address (32-bit for RSDT, 64-bit for XSDT):
|
|
* Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT
|
|
*/
|
|
if (table_entry_size == sizeof(u32)) {
|
|
/*
|
|
* 32-bit platform, RSDT: Return 32-bit table entry
|
|
* 64-bit platform, RSDT: Expand 32-bit to 64-bit and return
|
|
*/
|
|
return ((acpi_physical_address)
|
|
(*ACPI_CAST_PTR(u32, table_entry)));
|
|
} else {
|
|
/*
|
|
* 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return
|
|
* 64-bit platform, XSDT: Move (unaligned) 64-bit to local, return 64-bit
|
|
*/
|
|
ACPI_MOVE_64_TO_64(&address64, table_entry);
|
|
|
|
#if ACPI_MACHINE_WIDTH == 32
|
|
if (address64 > ACPI_UINT32_MAX) {
|
|
|
|
/* Will truncate 64-bit address to 32 bits, issue warning */
|
|
|
|
ACPI_WARNING((AE_INFO,
|
|
"64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating",
|
|
ACPI_FORMAT_UINT64(address64)));
|
|
}
|
|
#endif
|
|
return ((acpi_physical_address) (address64));
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_parse_root_table
|
|
*
|
|
* PARAMETERS: Rsdp - Pointer to the RSDP
|
|
* Flags - Flags
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to parse the Root System Description
|
|
* Table (RSDT or XSDT)
|
|
*
|
|
* NOTE: Tables are mapped (not copied) for efficiency. The FACS must
|
|
* be mapped and cannot be copied because it contains the actual
|
|
* memory location of the ACPI Global Lock.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status __init
|
|
acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags)
|
|
{
|
|
struct acpi_table_rsdp *rsdp;
|
|
acpi_native_uint table_entry_size;
|
|
acpi_native_uint i;
|
|
u32 table_count;
|
|
struct acpi_table_header *table;
|
|
acpi_physical_address address;
|
|
acpi_physical_address uninitialized_var(rsdt_address);
|
|
u32 length;
|
|
u8 *table_entry;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_parse_root_table);
|
|
|
|
/*
|
|
* Map the entire RSDP and extract the address of the RSDT or XSDT
|
|
*/
|
|
rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp));
|
|
if (!rsdp) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
acpi_tb_print_table_header(rsdp_address,
|
|
ACPI_CAST_PTR(struct acpi_table_header,
|
|
rsdp));
|
|
|
|
/* Differentiate between RSDT and XSDT root tables */
|
|
|
|
if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
|
|
/*
|
|
* Root table is an XSDT (64-bit physical addresses). We must use the
|
|
* XSDT if the revision is > 1 and the XSDT pointer is present, as per
|
|
* the ACPI specification.
|
|
*/
|
|
address = (acpi_physical_address) rsdp->xsdt_physical_address;
|
|
table_entry_size = sizeof(u64);
|
|
rsdt_address = (acpi_physical_address)
|
|
rsdp->rsdt_physical_address;
|
|
} else {
|
|
/* Root table is an RSDT (32-bit physical addresses) */
|
|
|
|
address = (acpi_physical_address) rsdp->rsdt_physical_address;
|
|
table_entry_size = sizeof(u32);
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the RSDP here before mapping other tables
|
|
*/
|
|
acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp));
|
|
|
|
if (table_entry_size == sizeof(u64)) {
|
|
if (acpi_tb_check_xsdt(address) == AE_NULL_ENTRY) {
|
|
/* XSDT has NULL entry, RSDT is used */
|
|
address = rsdt_address;
|
|
table_entry_size = sizeof(u32);
|
|
ACPI_WARNING((AE_INFO, "BIOS XSDT has NULL entry, "
|
|
"using RSDT"));
|
|
}
|
|
}
|
|
/* Map the RSDT/XSDT table header to get the full table length */
|
|
|
|
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
|
|
if (!table) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
acpi_tb_print_table_header(address, table);
|
|
|
|
/* Get the length of the full table, verify length and map entire table */
|
|
|
|
length = table->length;
|
|
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
|
|
|
|
if (length < sizeof(struct acpi_table_header)) {
|
|
ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT",
|
|
length));
|
|
return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
table = acpi_os_map_memory(address, length);
|
|
if (!table) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Validate the root table checksum */
|
|
|
|
status = acpi_tb_verify_checksum(table, length);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_os_unmap_memory(table, length);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Calculate the number of tables described in the root table */
|
|
|
|
table_count =
|
|
(u32) ((table->length -
|
|
sizeof(struct acpi_table_header)) / table_entry_size);
|
|
|
|
/*
|
|
* First two entries in the table array are reserved for the DSDT and FACS,
|
|
* which are not actually present in the RSDT/XSDT - they come from the FADT
|
|
*/
|
|
table_entry =
|
|
ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
|
|
acpi_gbl_root_table_list.count = 2;
|
|
|
|
/*
|
|
* Initialize the root table array from the RSDT/XSDT
|
|
*/
|
|
for (i = 0; i < table_count; i++) {
|
|
if (acpi_gbl_root_table_list.count >=
|
|
acpi_gbl_root_table_list.size) {
|
|
|
|
/* There is no more room in the root table array, attempt resize */
|
|
|
|
status = acpi_tb_resize_root_table_list();
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"Truncating %u table entries!",
|
|
(unsigned)
|
|
(acpi_gbl_root_table_list.size -
|
|
acpi_gbl_root_table_list.
|
|
count)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
|
|
|
|
acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
|
|
address =
|
|
acpi_tb_get_root_table_entry(table_entry, table_entry_size);
|
|
|
|
table_entry += table_entry_size;
|
|
acpi_gbl_root_table_list.count++;
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the root table here before mapping other tables
|
|
*/
|
|
acpi_os_unmap_memory(table, length);
|
|
|
|
/*
|
|
* Complete the initialization of the root table array by examining
|
|
* the header of each table
|
|
*/
|
|
for (i = 2; i < acpi_gbl_root_table_list.count; i++) {
|
|
acpi_tb_install_table(acpi_gbl_root_table_list.tables[i].
|
|
address, flags, NULL, i);
|
|
|
|
/* Special case for FADT - get the DSDT and FACS */
|
|
|
|
if (ACPI_COMPARE_NAME
|
|
(&acpi_gbl_root_table_list.tables[i].signature,
|
|
ACPI_SIG_FADT)) {
|
|
acpi_tb_parse_fadt(i, flags);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|