linux_dsm_epyc7002/drivers/acpi/tables/tbxfroot.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

640 lines
18 KiB
C

/******************************************************************************
*
* Module Name: tbxfroot - Find the root ACPI table (RSDT)
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, 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 <linux/module.h>
#include <acpi/acpi.h>
#include <acpi/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxfroot")
/* Local prototypes */
static acpi_status
acpi_tb_find_rsdp (
struct acpi_table_desc *table_info,
u32 flags);
static u8 *
acpi_tb_scan_memory_for_rsdp (
u8 *start_address,
u32 length);
/*******************************************************************************
*
* FUNCTION: acpi_tb_find_table
*
* PARAMETERS: Signature - String with ACPI table signature
* oem_id - String with the table OEM ID
* oem_table_id - String with the OEM Table ID
* table_ptr - Where the table pointer is returned
*
* RETURN: Status
*
* DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
* Signature, OEM ID and OEM Table ID.
*
******************************************************************************/
acpi_status
acpi_tb_find_table (
char *signature,
char *oem_id,
char *oem_table_id,
struct acpi_table_header **table_ptr)
{
acpi_status status;
struct acpi_table_header *table;
ACPI_FUNCTION_TRACE ("tb_find_table");
/* Validate string lengths */
if ((ACPI_STRLEN (signature) > ACPI_NAME_SIZE) ||
(ACPI_STRLEN (oem_id) > sizeof (table->oem_id)) ||
(ACPI_STRLEN (oem_table_id) > sizeof (table->oem_table_id))) {
return_ACPI_STATUS (AE_AML_STRING_LIMIT);
}
if (!ACPI_STRNCMP (signature, DSDT_SIG, ACPI_NAME_SIZE)) {
/*
* The DSDT pointer is contained in the FADT, not the RSDT.
* This code should suffice, because the only code that would perform
* a "find" on the DSDT is the data_table_region() AML opcode -- in
* which case, the DSDT is guaranteed to be already loaded.
* If this becomes insufficient, the FADT will have to be found first.
*/
if (!acpi_gbl_DSDT) {
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
table = acpi_gbl_DSDT;
}
else {
/* Find the table */
status = acpi_get_firmware_table (signature, 1,
ACPI_LOGICAL_ADDRESSING, &table);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Check oem_id and oem_table_id */
if ((oem_id[0] && ACPI_STRNCMP (
oem_id, table->oem_id,
sizeof (table->oem_id))) ||
(oem_table_id[0] && ACPI_STRNCMP (
oem_table_id, table->oem_table_id,
sizeof (table->oem_table_id)))) {
return_ACPI_STATUS (AE_AML_NAME_NOT_FOUND);
}
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
table->signature));
*table_ptr = table;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_firmware_table
*
* PARAMETERS: Signature - Any ACPI table signature
* Instance - the non zero instance of the table, allows
* support for multiple tables of the same type
* Flags - Physical/Virtual support
* table_pointer - Where a buffer containing the table is
* returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get an ACPI table. A buffer is
* allocated for the table and returned in table_pointer.
* This table will be a complete table including the header.
*
******************************************************************************/
acpi_status
acpi_get_firmware_table (
acpi_string signature,
u32 instance,
u32 flags,
struct acpi_table_header **table_pointer)
{
acpi_status status;
struct acpi_pointer address;
struct acpi_table_header *header = NULL;
struct acpi_table_desc *table_info = NULL;
struct acpi_table_desc *rsdt_info;
u32 table_count;
u32 i;
u32 j;
ACPI_FUNCTION_TRACE ("acpi_get_firmware_table");
/*
* Ensure that at least the table manager is initialized. We don't
* require that the entire ACPI subsystem is up for this interface.
* If we have a buffer, we must have a length too
*/
if ((instance == 0) ||
(!signature) ||
(!table_pointer)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Ensure that we have a RSDP */
if (!acpi_gbl_RSDP) {
/* Get the RSDP */
status = acpi_os_get_root_pointer (flags, &address);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP not found\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Map and validate the RSDP */
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
status = acpi_os_map_memory (address.pointer.physical,
sizeof (struct rsdp_descriptor), (void *) &acpi_gbl_RSDP);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
else {
acpi_gbl_RSDP = address.pointer.logical;
}
/* The signature and checksum must both be correct */
if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG,
sizeof (RSDP_SIG)-1) != 0) {
/* Nope, BAD Signature */
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
if (acpi_tb_checksum (acpi_gbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
/* Nope, BAD Checksum */
return_ACPI_STATUS (AE_BAD_CHECKSUM);
}
}
/* Get the RSDT address via the RSDP */
acpi_tb_get_rsdt_address (&address);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
acpi_gbl_RSDP,
ACPI_FORMAT_UINT64 (address.pointer.value)));
/* Insert processor_mode flags */
address.pointer_type |= flags;
/* Get and validate the RSDT */
rsdt_info = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
if (!rsdt_info) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
status = acpi_tb_get_table (&address, rsdt_info);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
status = acpi_tb_validate_rsdt (rsdt_info->pointer);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Allocate a scratch table header and table descriptor */
header = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_header));
if (!header) {
status = AE_NO_MEMORY;
goto cleanup;
}
table_info = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_desc));
if (!table_info) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Get the number of table pointers within the RSDT */
table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, rsdt_info->pointer);
address.pointer_type = acpi_gbl_table_flags | flags;
/*
* Search the RSDT/XSDT for the correct instance of the
* requested table
*/
for (i = 0, j = 0; i < table_count; i++) {
/* Get the next table pointer, handle RSDT vs. XSDT */
if (acpi_gbl_RSDP->revision < 2) {
address.pointer.value = (ACPI_CAST_PTR (
RSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
}
else {
address.pointer.value = (ACPI_CAST_PTR (
XSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
}
/* Get the table header */
status = acpi_tb_get_table_header (&address, header);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Compare table signatures and table instance */
if (!ACPI_STRNCMP (header->signature, signature, ACPI_NAME_SIZE)) {
/* An instance of the table was found */
j++;
if (j >= instance) {
/* Found the correct instance, get the entire table */
status = acpi_tb_get_table_body (&address, header, table_info);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
*table_pointer = table_info->pointer;
goto cleanup;
}
}
}
/* Did not find the table */
status = AE_NOT_EXIST;
cleanup:
acpi_os_unmap_memory (rsdt_info->pointer,
(acpi_size) rsdt_info->pointer->length);
ACPI_MEM_FREE (rsdt_info);
if (header) {
ACPI_MEM_FREE (header);
}
if (table_info) {
ACPI_MEM_FREE (table_info);
}
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_get_firmware_table);
/* TBD: Move to a new file */
#if ACPI_MACHINE_WIDTH != 16
/*******************************************************************************
*
* FUNCTION: acpi_find_root_pointer
*
* PARAMETERS: Flags - Logical/Physical addressing
* rsdp_address - Where to place the RSDP address
*
* RETURN: Status, Physical address of the RSDP
*
* DESCRIPTION: Find the RSDP
*
******************************************************************************/
acpi_status
acpi_find_root_pointer (
u32 flags,
struct acpi_pointer *rsdp_address)
{
struct acpi_table_desc table_info;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_find_root_pointer");
/* Get the RSDP */
status = acpi_tb_find_rsdp (&table_info, flags);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"RSDP structure not found, %s Flags=%X\n",
acpi_format_exception (status), flags));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
rsdp_address->pointer_type = ACPI_PHYSICAL_POINTER;
rsdp_address->pointer.physical = table_info.physical_address;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_scan_memory_for_rsdp
*
* PARAMETERS: start_address - Starting pointer for search
* Length - Maximum length to search
*
* RETURN: Pointer to the RSDP if found, otherwise NULL.
*
* DESCRIPTION: Search a block of memory for the RSDP signature
*
******************************************************************************/
static u8 *
acpi_tb_scan_memory_for_rsdp (
u8 *start_address,
u32 length)
{
u8 *mem_rover;
u8 *end_address;
u8 checksum;
ACPI_FUNCTION_TRACE ("tb_scan_memory_for_rsdp");
end_address = start_address + length;
/* Search from given start address for the requested length */
for (mem_rover = start_address; mem_rover < end_address;
mem_rover += ACPI_RSDP_SCAN_STEP) {
/* The signature and checksum must both be correct */
if (ACPI_STRNCMP ((char *) mem_rover,
RSDP_SIG, sizeof (RSDP_SIG) - 1) != 0) {
/* No signature match, keep looking */
continue;
}
/* Signature matches, check the appropriate checksum */
if ((ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover))->revision < 2) {
/* ACPI version 1.0 */
checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_CHECKSUM_LENGTH);
}
else {
/* Post ACPI 1.0, use extended_checksum */
checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_XCHECKSUM_LENGTH);
}
if (checksum == 0) {
/* Checksum valid, we have found a valid RSDP */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at physical address %p\n", mem_rover));
return_PTR (mem_rover);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Found an RSDP at physical address %p, but it has a bad checksum\n",
mem_rover));
}
/* Searched entire block, no RSDP was found */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Searched entire block, no valid RSDP was found.\n"));
return_PTR (NULL);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_find_rsdp
*
* PARAMETERS: table_info - Where the table info is returned
* Flags - Current memory mode (logical vs.
* physical addressing)
*
* RETURN: Status, RSDP physical address
*
* DESCRIPTION: search lower 1_mbyte of memory for the root system descriptor
* pointer structure. If it is found, set *RSDP to point to it.
*
* NOTE1: The RSDp must be either in the first 1_k of the Extended
* BIOS Data Area or between E0000 and FFFFF (From ACPI Spec.)
* Only a 32-bit physical address is necessary.
*
* NOTE2: This function is always available, regardless of the
* initialization state of the rest of ACPI.
*
******************************************************************************/
static acpi_status
acpi_tb_find_rsdp (
struct acpi_table_desc *table_info,
u32 flags)
{
u8 *table_ptr;
u8 *mem_rover;
u32 physical_address;
acpi_status status;
ACPI_FUNCTION_TRACE ("tb_find_rsdp");
/*
* Scan supports either logical addressing or physical addressing
*/
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
/* 1a) Get the location of the Extended BIOS Data Area (EBDA) */
status = acpi_os_map_memory (
(acpi_physical_address) ACPI_EBDA_PTR_LOCATION,
ACPI_EBDA_PTR_LENGTH, (void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X for length %X\n",
ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
return_ACPI_STATUS (status);
}
ACPI_MOVE_16_TO_32 (&physical_address, table_ptr);
/* Convert segment part to physical address */
physical_address <<= 4;
acpi_os_unmap_memory (table_ptr, ACPI_EBDA_PTR_LENGTH);
/* EBDA present? */
if (physical_address > 0x400) {
/*
* 1b) Search EBDA paragraphs (EBDa is required to be a
* minimum of 1_k length)
*/
status = acpi_os_map_memory (
(acpi_physical_address) physical_address,
ACPI_EBDA_WINDOW_SIZE, (void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X for length %X\n",
physical_address, ACPI_EBDA_WINDOW_SIZE));
return_ACPI_STATUS (status);
}
mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr,
ACPI_EBDA_WINDOW_SIZE);
acpi_os_unmap_memory (table_ptr, ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr);
table_info->physical_address =
(acpi_physical_address) physical_address;
return_ACPI_STATUS (AE_OK);
}
}
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
*/
status = acpi_os_map_memory (
(acpi_physical_address) ACPI_HI_RSDP_WINDOW_BASE,
ACPI_HI_RSDP_WINDOW_SIZE, (void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X for length %X\n",
ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
return_ACPI_STATUS (status);
}
mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
physical_address =
ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
table_info->physical_address =
(acpi_physical_address) physical_address;
return_ACPI_STATUS (AE_OK);
}
}
/*
* Physical addressing
*/
else {
/* 1a) Get the location of the EBDA */
ACPI_MOVE_16_TO_32 (&physical_address, ACPI_EBDA_PTR_LOCATION);
physical_address <<= 4; /* Convert segment to physical address */
/* EBDA present? */
if (physical_address > 0x400) {
/*
* 1b) Search EBDA paragraphs (EBDa is required to be a minimum of
* 1_k length)
*/
mem_rover = acpi_tb_scan_memory_for_rsdp (
ACPI_PHYSADDR_TO_PTR (physical_address),
ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
return_ACPI_STATUS (AE_OK);
}
}
/* 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh */
mem_rover = acpi_tb_scan_memory_for_rsdp (
ACPI_PHYSADDR_TO_PTR (ACPI_HI_RSDP_WINDOW_BASE),
ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
return_ACPI_STATUS (AE_OK);
}
}
/* RSDP signature was not found */
return_ACPI_STATUS (AE_NOT_FOUND);
}
#endif