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|
/******************************************************************************
*
* Module Name: oslinuxtbl - Linux OSL for obtaining ACPI tables
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2013, Intel Corp.
* 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 "acpidump.h"
#include <dirent.h>
#include <sys/mman.h>
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME ("oslinuxtbl")
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef PATH_MAX
#define PATH_MAX 256
#endif
/* Local prototypes */
static ACPI_STATUS
OslTableInitialize (
void);
static ACPI_STATUS
OslReadTableFromFile (
FILE *TableFile,
ACPI_SIZE FileOffset,
char *Signature,
ACPI_TABLE_HEADER **Table);
static ACPI_STATUS
OslMapTable (
ACPI_SIZE Address,
char *Signature,
ACPI_TABLE_HEADER **Table);
static ACPI_STATUS
OslGetOverrideTable (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address);
static ACPI_STATUS
OslGetDynamicSsdt (
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address);
static ACPI_STATUS
OslAddTablesToList (
char *Directory);
static ACPI_STATUS
OslGetTableViaRoot (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address);
/* File locations */
#define DYNAMIC_SSDT_DIR "/sys/firmware/acpi/tables/dynamic"
#define OVERRIDE_TABLE_DIR "/sys/firmware/acpi/tables"
#define SYSTEM_MEMORY "/dev/mem"
/* Should we get dynamically loaded SSDTs from DYNAMIC_SSDT_DIR? */
UINT8 Gbl_DumpDynamicSsdts = TRUE;
/* Initialization flags */
UINT8 Gbl_TableListInitialized = FALSE;
UINT8 Gbl_MainTableObtained = FALSE;
/* Local copies of main ACPI tables */
ACPI_TABLE_RSDP Gbl_Rsdp;
ACPI_TABLE_FADT *Gbl_Fadt;
ACPI_TABLE_RSDT *Gbl_Rsdt;
ACPI_TABLE_XSDT *Gbl_Xsdt;
/* Fadt address */
ACPI_PHYSICAL_ADDRESS Gbl_FadtAddress;
/* Revision of RSD PTR */
UINT8 Gbl_Revision;
/* List of information about obtained ACPI tables */
typedef struct table_info
{
struct table_info *Next;
UINT32 Instance;
char Signature[4];
} OSL_TABLE_INFO;
OSL_TABLE_INFO *Gbl_TableListHead = NULL;
/******************************************************************************
*
* FUNCTION: AcpiOsGetTableByAddress
*
* PARAMETERS: Address - Physical address of the ACPI table
* Table - Where a pointer to the table is returned
*
* RETURN: Status; Table buffer is returned if AE_OK.
* AE_NOT_FOUND: A valid table was not found at the address
*
* DESCRIPTION: Get an ACPI table via a physical memory address.
*
*****************************************************************************/
ACPI_STATUS
AcpiOsGetTableByAddress (
ACPI_PHYSICAL_ADDRESS Address,
ACPI_TABLE_HEADER **Table)
{
ACPI_TABLE_HEADER *MappedTable;
ACPI_TABLE_HEADER *LocalTable;
ACPI_STATUS Status;
/* Validate the input physical address to avoid program crash */
if (Address < ACPI_HI_RSDP_WINDOW_BASE)
{
fprintf (stderr, "Invalid table address: 0x%8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (Address));
return (AE_BAD_ADDRESS);
}
/* Map the table and validate it */
Status = OslMapTable (Address, NULL, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Copy table to local buffer and return it */
LocalTable = calloc (1, MappedTable->Length);
if (!LocalTable)
{
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (LocalTable, MappedTable, MappedTable->Length);
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
*Table = LocalTable;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiOsGetTableByName
*
* PARAMETERS: Signature - ACPI Signature for desired table. Must be
* a null terminated 4-character string.
* Instance - Multiple table support for SSDT/UEFI (0...n)
* Must be 0 for other tables.
* Table - Where a pointer to the table is returned
* Address - Where the table physical address is returned
*
* RETURN: Status; Table buffer and physical address returned if AE_OK.
* AE_LIMIT: Instance is beyond valid limit
* AE_NOT_FOUND: A table with the signature was not found
*
* NOTE: Assumes the input signature is uppercase.
*
*****************************************************************************/
ACPI_STATUS
AcpiOsGetTableByName (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address)
{
ACPI_STATUS Status;
/* Instance is only valid for SSDTs */
if (Instance &&
!ACPI_COMPARE_NAME (Signature, ACPI_SIG_SSDT) &&
!ACPI_COMPARE_NAME (Signature, ACPI_SIG_UEFI))
{
return (AE_LIMIT);
}
/* Get main ACPI tables from memory on first invocation of this function */
if (!Gbl_MainTableObtained)
{
Status = OslTableInitialize ();
if (ACPI_FAILURE (Status))
{
return (Status);
}
Gbl_MainTableObtained = TRUE;
}
/*
* If one of the main ACPI tables was requested (RSDT/XSDT/FADT),
* simply return it immediately.
*/
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_XSDT))
{
if (!Gbl_Revision)
{
return (AE_NOT_FOUND);
}
*Address = Gbl_Rsdp.XsdtPhysicalAddress;
*Table = (ACPI_TABLE_HEADER *) Gbl_Xsdt;
return (AE_OK);
}
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_RSDT))
{
if (!Gbl_Rsdp.RsdtPhysicalAddress)
{
return (AE_NOT_FOUND);
}
*Address = Gbl_Rsdp.RsdtPhysicalAddress;
*Table = (ACPI_TABLE_HEADER *) Gbl_Rsdt;
return (AE_OK);
}
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_FADT))
{
*Address = Gbl_FadtAddress;
*Table = (ACPI_TABLE_HEADER *) Gbl_Fadt;
return (AE_OK);
}
/* Not a main ACPI table, attempt to extract it from the RSDT/XSDT */
Status = OslGetTableViaRoot (Signature, Instance, Table, Address);
if (ACPI_FAILURE (Status))
{
/* Attempt to get the table from the override directory */
Status = OslGetOverrideTable (Signature, Instance, Table, Address);
if ((Status == AE_LIMIT) && Gbl_DumpDynamicSsdts)
{
/* Attempt to get a dynamic SSDT */
Status = OslGetDynamicSsdt (Instance, Table, Address);
}
return (Status);
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiOsGetTableByIndex
*
* PARAMETERS: Index - Which table to get
* Table - Where a pointer to the table is returned
* Address - Where the table physical address is returned
*
* RETURN: Status; Table buffer and physical address returned if AE_OK.
* AE_LIMIT: Index is beyond valid limit
*
* DESCRIPTION: Get an ACPI table via an index value (0 through n). Returns
* AE_LIMIT when an invalid index is reached. Index is not
* necessarily an index into the RSDT/XSDT.
*
*****************************************************************************/
ACPI_STATUS
AcpiOsGetTableByIndex (
UINT32 Index,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address)
{
OSL_TABLE_INFO *Info;
ACPI_STATUS Status;
UINT32 i;
/* Initialize the table list on first invocation */
if (!Gbl_TableListInitialized)
{
Gbl_TableListHead = calloc (1, sizeof (OSL_TABLE_INFO));
/* List head records the length of the list */
Gbl_TableListHead->Instance = 0;
/* Add all tables found in the override directory */
Status = OslAddTablesToList (OVERRIDE_TABLE_DIR);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Add all dynamically loaded SSDTs in the dynamic directory */
OslAddTablesToList (DYNAMIC_SSDT_DIR);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Gbl_TableListInitialized = TRUE;
}
/* Validate Index */
if (Index >= Gbl_TableListHead->Instance)
{
return (AE_LIMIT);
}
/* Point to the table list entry specified by the Index argument */
Info = Gbl_TableListHead;
for (i = 0; i <= Index; i++)
{
Info = Info->Next;
}
/* Now we can just get the table via the signature */
Status = AcpiOsGetTableByName (Info->Signature, Info->Instance,
Table, Address);
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiOsMapMemory
*
* PARAMETERS: Where - Physical address of memory to be mapped
* Length - How much memory to map
*
* RETURN: Pointer to mapped memory. Null on error.
*
* DESCRIPTION: Map physical memory into local address space.
*
*****************************************************************************/
void *
AcpiOsMapMemory (
ACPI_PHYSICAL_ADDRESS Where,
ACPI_SIZE Length)
{
UINT8 *MappedMemory;
ACPI_PHYSICAL_ADDRESS Offset;
ACPI_SIZE PageSize;
int fd;
fd = open (SYSTEM_MEMORY, O_RDONLY | O_BINARY);
if (fd < 0)
{
fprintf (stderr, "Cannot open %s\n", SYSTEM_MEMORY);
return (NULL);
}
/* Align the offset to use mmap */
PageSize = sysconf (_SC_PAGESIZE);
Offset = Where % PageSize;
/* Map the table header to get the length of the full table */
MappedMemory = mmap (NULL, (Length + Offset), PROT_READ, MAP_PRIVATE,
fd, (Where - Offset));
close (fd);
if (MappedMemory == MAP_FAILED)
{
return (NULL);
}
return (ACPI_CAST8 (MappedMemory + Offset));
}
/******************************************************************************
*
* FUNCTION: AcpiOsUnmapMemory
*
* PARAMETERS: Where - Logical address of memory to be unmapped
* Length - How much memory to unmap
*
* RETURN: None.
*
* DESCRIPTION: Delete a previously created mapping. Where and Length must
* correspond to a previous mapping exactly.
*
*****************************************************************************/
void
AcpiOsUnmapMemory (
void *Where,
ACPI_SIZE Length)
{
ACPI_PHYSICAL_ADDRESS Offset;
ACPI_SIZE PageSize;
PageSize = sysconf (_SC_PAGESIZE);
Offset = (ACPI_PHYSICAL_ADDRESS) Where % PageSize;
munmap ((UINT8 *) Where - Offset, (Length + Offset));
}
/******************************************************************************
*
* FUNCTION: OslTableInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize ACPI table data. Get and store main ACPI tables to
* local variables. Main ACPI tables include RSDT, FADT, RSDT,
* and/or XSDT.
*
*****************************************************************************/
static ACPI_STATUS
OslTableInitialize (
void)
{
ACPI_TABLE_HEADER *MappedTable;
UINT8 *TableData;
UINT8 *RsdpAddress;
ACPI_PHYSICAL_ADDRESS RsdpBase;
ACPI_SIZE RsdpSize;
ACPI_STATUS Status;
/* Get RSDP from memory */
RsdpBase = ACPI_HI_RSDP_WINDOW_BASE;
RsdpSize = ACPI_HI_RSDP_WINDOW_SIZE;
RsdpAddress = AcpiOsMapMemory (RsdpBase, RsdpSize);
if (!RsdpAddress)
{
return (AE_BAD_ADDRESS);
}
/* Search low memory for the RSDP */
MappedTable = ACPI_CAST_PTR (ACPI_TABLE_HEADER,
AcpiTbScanMemoryForRsdp (RsdpAddress, RsdpSize));
if (!MappedTable)
{
AcpiOsUnmapMemory (RsdpAddress, RsdpSize);
return (AE_ERROR);
}
ACPI_MEMCPY (&Gbl_Rsdp, MappedTable, sizeof (ACPI_TABLE_RSDP));
AcpiOsUnmapMemory (RsdpAddress, RsdpSize);
/* Get XSDT from memory */
if (Gbl_Rsdp.Revision)
{
Status = OslMapTable (Gbl_Rsdp.XsdtPhysicalAddress,
ACPI_SIG_XSDT, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Gbl_Revision = 2;
Gbl_Xsdt = calloc (1, MappedTable->Length);
if (!Gbl_Xsdt)
{
fprintf (stderr,
"XSDT: Could not allocate buffer for table of length %X\n",
MappedTable->Length);
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (Gbl_Xsdt, MappedTable, MappedTable->Length);
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
}
/* Get RSDT from memory */
if (Gbl_Rsdp.RsdtPhysicalAddress)
{
Status = OslMapTable (Gbl_Rsdp.RsdtPhysicalAddress,
ACPI_SIG_RSDT, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Gbl_Rsdt = calloc (1, MappedTable->Length);
if (!Gbl_Rsdt)
{
fprintf (stderr,
"RSDT: Could not allocate buffer for table of length %X\n",
MappedTable->Length);
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (Gbl_Rsdt, MappedTable, MappedTable->Length);
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
}
/* Get FADT from memory */
if (Gbl_Revision)
{
TableData = ACPI_CAST8 (Gbl_Xsdt) + sizeof (ACPI_TABLE_HEADER);
Gbl_FadtAddress = (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST64 (TableData));
}
else
{
TableData = ACPI_CAST8 (Gbl_Rsdt) + sizeof (ACPI_TABLE_HEADER);
Gbl_FadtAddress = (ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST32 (TableData));
}
if (!Gbl_FadtAddress)
{
fprintf(stderr, "FADT: Table could not be found\n");
return (AE_ERROR);
}
Status = OslMapTable (Gbl_FadtAddress, ACPI_SIG_FADT, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Gbl_Fadt = calloc (1, MappedTable->Length);
if (!Gbl_Fadt)
{
fprintf (stderr,
"FADT: Could not allocate buffer for table of length %X\n",
MappedTable->Length);
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (Gbl_Fadt, MappedTable, MappedTable->Length);
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: OslGetTableViaRoot
*
* PARAMETERS: Signature - ACPI Signature for common table. Must be
* a null terminated 4-character string.
* Instance - Multiple table support for SSDT/UEFI (0...n)
* Must be 0 for other tables.
* Table - Where a pointer to the table is returned
* Address - Where the table physical address is returned
*
* RETURN: Status; Table buffer and physical address returned if AE_OK.
* AE_LIMIT: Instance is beyond valid limit
* AE_NOT_FOUND: A table with the signature was not found
*
* DESCRIPTION: Get an ACPI table via the root table (RSDT/XSDT)
*
* NOTE: Assumes the input signature is uppercase.
*
*****************************************************************************/
static ACPI_STATUS
OslGetTableViaRoot (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address)
{
ACPI_TABLE_HEADER *LocalTable = NULL;
ACPI_TABLE_HEADER *MappedTable = NULL;
UINT8 *TableData;
UINT8 NumberOfTables;
UINT8 ItemSize;
UINT32 CurrentInstance = 0;
ACPI_PHYSICAL_ADDRESS TableAddress = 0;
ACPI_STATUS Status;
UINT32 i;
/* DSDT and FACS address must be extracted from the FADT */
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_DSDT) ||
ACPI_COMPARE_NAME (Signature, ACPI_SIG_FACS))
{
/*
* Get the appropriate address, either 32-bit or 64-bit. Be very
* careful about the FADT length and validate table addresses.
* Note: The 64-bit addresses have priority.
*/
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_DSDT))
{
if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XDSDT) &&
Gbl_Fadt->XDsdt)
{
TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XDsdt;
}
else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_DSDT) &&
Gbl_Fadt->Dsdt)
{
TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Dsdt;
}
}
else /* FACS */
{
if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XFACS) &&
Gbl_Fadt->XFacs)
{
TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XFacs;
}
else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_FACS) &&
Gbl_Fadt->Facs)
{
TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Facs;
}
}
if (!TableAddress)
{
fprintf (stderr,
"Could not find a valid address for %4.4s in the FADT\n",
Signature);
return (AE_NOT_FOUND);
}
/* Now we can get the requested table (DSDT or FACS) */
Status = OslMapTable (TableAddress, Signature, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
else /* Case for a normal ACPI table */
{
if (Gbl_Revision)
{
ItemSize = sizeof (UINT64);
TableData = ACPI_CAST8 (Gbl_Xsdt) + sizeof (ACPI_TABLE_HEADER);
NumberOfTables =
(Gbl_Xsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
/ ItemSize;
}
else /* Use RSDT if XSDT is not available */
{
ItemSize = sizeof (UINT32);
TableData = ACPI_CAST8 (Gbl_Rsdt) + sizeof (ACPI_TABLE_HEADER);
NumberOfTables =
(Gbl_Rsdt->Header.Length - sizeof (ACPI_TABLE_HEADER))
/ ItemSize;
}
/* Search RSDT/XSDT for the requested table */
for (i = 0; i < NumberOfTables; ++i, TableData += ItemSize)
{
if (Gbl_Revision)
{
TableAddress =
(ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST64 (TableData));
}
else
{
TableAddress =
(ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST32 (TableData));
}
Status = OslMapTable (TableAddress, NULL, &MappedTable);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Does this table match the requested signature? */
if (!ACPI_COMPARE_NAME (MappedTable->Signature, Signature))
{
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
MappedTable = NULL;
continue;
}
/* Match table instance (for SSDT/UEFI tables) */
if (CurrentInstance != Instance)
{
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
MappedTable = NULL;
CurrentInstance++;
continue;
}
break;
}
}
if (CurrentInstance != Instance)
{
return (AE_LIMIT);
}
if (!MappedTable)
{
return (AE_NOT_FOUND);
}
/* Copy table to local buffer and return it */
LocalTable = calloc (1, MappedTable->Length);
if (!LocalTable)
{
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (LocalTable, MappedTable, MappedTable->Length);
AcpiOsUnmapMemory (MappedTable, MappedTable->Length);
*Address = TableAddress;
*Table = LocalTable;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: OslAddTablesToList
*
* PARAMETERS: Directory - Directory that contains the tables
*
* RETURN: Status; Table list is initialized if AE_OK.
*
* DESCRIPTION: Add ACPI tables to the table list from a directory.
*
*****************************************************************************/
static ACPI_STATUS
OslAddTablesToList(
char *Directory)
{
struct stat FileInfo;
OSL_TABLE_INFO *NewInfo;
OSL_TABLE_INFO *Info;
struct dirent *DirInfo;
DIR *TableDir;
char TempName[4];
char Filename[PATH_MAX];
UINT32 i;
/* Open the requested directory */
if (stat (Directory, &FileInfo) == -1)
{
return (AE_NOT_FOUND);
}
if (!(TableDir = opendir (Directory)))
{
return (AE_ERROR);
}
/* Move pointer to the end of the list */
if (!Gbl_TableListHead)
{
return (AE_ERROR);
}
Info = Gbl_TableListHead;
for (i = 0; i < Gbl_TableListHead->Instance; i++)
{
Info = Info->Next;
}
/* Examine all entries in this directory */
while ((DirInfo = readdir (TableDir)) != 0)
{
/* Ignore meaningless files */
if (DirInfo->d_name[0] == '.')
{
continue;
}
/* Skip any subdirectories and create a new info node */
sprintf (Filename, "%s/%s", Directory, DirInfo->d_name);
if (stat (Filename, &FileInfo) == -1)
{
return (AE_ERROR);
}
if (!S_ISDIR (FileInfo.st_mode))
{
NewInfo = calloc (1, sizeof (OSL_TABLE_INFO));
if (strlen (DirInfo->d_name) > ACPI_NAME_SIZE)
{
sscanf (DirInfo->d_name, "%[^1-9]%d",
TempName, &NewInfo->Instance);
}
/* Add new info node to global table list */
sscanf (DirInfo->d_name, "%4s", NewInfo->Signature);
Info->Next = NewInfo;
Info = NewInfo;
Gbl_TableListHead->Instance++;
}
}
closedir (TableDir);
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: OslMapTable
*
* PARAMETERS: Address - Address of the table in memory
* Signature - Optional ACPI Signature for desired table.
* Null terminated 4-character string.
* Table - Where a pointer to the mapped table is
* returned
*
* RETURN: Status; Mapped table is returned if AE_OK.
*
* DESCRIPTION: Map entire ACPI table into caller's address space. Also
* validates the table and checksum.
*
*****************************************************************************/
static ACPI_STATUS
OslMapTable (
ACPI_SIZE Address,
char *Signature,
ACPI_TABLE_HEADER **Table)
{
ACPI_TABLE_HEADER *MappedTable;
UINT32 Length;
/* Map the header so we can get the table length */
MappedTable = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
if (!MappedTable)
{
fprintf (stderr, "Could not map table header at 0x%8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (Address));
return (AE_BAD_ADDRESS);
}
/* Check if table is valid */
if (!ApIsValidHeader (MappedTable))
{
return (AE_BAD_HEADER);
}
/* If specified, signature must match */
if (Signature &&
!ACPI_COMPARE_NAME (Signature, MappedTable->Signature))
{
return (AE_NOT_EXIST);
}
/* Map the entire table */
Length = MappedTable->Length;
AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER));
MappedTable = AcpiOsMapMemory (Address, Length);
if (!MappedTable)
{
fprintf (stderr, "Could not map table at 0x%8.8X%8.8X length %8.8X\n",
ACPI_FORMAT_UINT64 (Address), Length);
return (AE_NO_MEMORY);
}
*Table = MappedTable;
/*
* Checksum for RSDP.
* Note: Other checksums are computed during the table dump.
*/
if (AcpiTbValidateRsdp (ACPI_CAST_PTR (ACPI_TABLE_RSDP, MappedTable)) ==
AE_BAD_CHECKSUM)
{
fprintf (stderr, "Warning: wrong checksum for RSDP\n");
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: OslReadTableFromFile
*
* PARAMETERS: TableFile - File that contains the desired table
* FileOffset - Offset of the table in file
* Signature - Optional ACPI Signature for desired table.
* A null terminated 4-character string.
* Table - Where a pointer to the table is returned
*
* RETURN: Status; Table buffer is returned if AE_OK.
*
* DESCRIPTION: Read a ACPI table from a file.
*
*****************************************************************************/
static ACPI_STATUS
OslReadTableFromFile (
FILE *TableFile,
ACPI_SIZE FileOffset,
char *Signature,
ACPI_TABLE_HEADER **Table)
{
ACPI_TABLE_HEADER Header;
ACPI_TABLE_RSDP Rsdp;
ACPI_TABLE_HEADER *LocalTable;
UINT32 TableLength;
UINT32 Count;
/* Read the table header */
fseek (TableFile, FileOffset, SEEK_SET);
Count = fread (&Header, 1, sizeof (ACPI_TABLE_HEADER), TableFile);
if (Count != sizeof (ACPI_TABLE_HEADER))
{
fprintf (stderr, "Could not read ACPI table header from file\n");
return (AE_BAD_HEADER);
}
/* Check if table is valid */
if (!ApIsValidHeader (&Header))
{
return (AE_BAD_HEADER);
}
/* If signature is specified, it must match the table */
if (Signature &&
!ACPI_COMPARE_NAME (Signature, Header.Signature))
{
fprintf (stderr, "Incorrect signature: Expecting %4.4s, found %4.4s\n",
Signature, Header.Signature);
return (AE_NOT_FOUND);
}
/*
* For RSDP, we must read the entire table, because the length field
* is in a non-standard place, beyond the normal ACPI header.
*/
if (ACPI_COMPARE_NAME (Header.Signature, ACPI_SIG_RSDP))
{
fseek (TableFile, FileOffset, SEEK_SET);
Count = fread (&Rsdp, 1, sizeof (ACPI_TABLE_RSDP), TableFile);
if (Count != sizeof (ACPI_TABLE_RSDP))
{
fprintf (stderr, "Error while reading RSDP\n");
return (AE_NOT_FOUND);
}
TableLength = Rsdp.Length;
}
else
{
TableLength = Header.Length;
}
/* Read the entire table into a local buffer */
LocalTable = calloc (1, TableLength);
if (!LocalTable)
{
fprintf (stderr,
"%4.4s: Could not allocate buffer for table of length %X\n",
Header.Signature, TableLength);
return (AE_NO_MEMORY);
}
fseek (TableFile, FileOffset, SEEK_SET);
Count = fread (LocalTable, 1, TableLength, TableFile);
if (Count != TableLength)
{
fprintf (stderr, "%4.4s: Error while reading table content\n",
Header.Signature);
return (AE_NOT_FOUND);
}
/* Validate checksum, except for special tables */
if (!ACPI_COMPARE_NAME (Header.Signature, ACPI_SIG_S3PT) &&
!ACPI_COMPARE_NAME (Header.Signature, ACPI_SIG_FACS))
{
if (AcpiTbChecksum ((UINT8 *) LocalTable, TableLength))
{
fprintf (stderr, "%4.4s: Warning: wrong checksum\n",
Header.Signature);
}
}
*Table = LocalTable;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: OslGetOverrideTable
*
* PARAMETERS: Signature - ACPI Signature for desired table. Must be
* a null terminated 4-character string.
* Instance - Multiple table support for SSDT/UEFI (0...n)
* Must be 0 for other tables.
* Table - Where a pointer to the table is returned
* Address - Where the table physical address is returned
*
* RETURN: Status; Table buffer is returned if AE_OK.
* AE_NOT_FOUND: A valid table was not found at the address
*
* DESCRIPTION: Get a table that was overridden and appears under the
* directory OVERRIDE_TABLE_DIR.
*
*****************************************************************************/
static ACPI_STATUS
OslGetOverrideTable (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address)
{
ACPI_TABLE_HEADER Header;
struct stat FileInfo;
struct dirent *DirInfo;
DIR *TableDir;
FILE *TableFile = NULL;
UINT32 CurrentInstance = 0;
UINT32 Count;
char TempName[4];
char TableFilename[PATH_MAX];
ACPI_STATUS Status;
/* Open the directory for override tables */
if (stat (OVERRIDE_TABLE_DIR, &FileInfo) == -1)
{
return (AE_NOT_FOUND);
}
if (!(TableDir = opendir (OVERRIDE_TABLE_DIR)))
{
return (AE_ERROR);
}
/* Attempt to find the table in the directory */
while ((DirInfo = readdir (TableDir)) != 0)
{
/* Ignore meaningless files */
if (DirInfo->d_name[0] == '.')
{
continue;
}
if (!ACPI_COMPARE_NAME (DirInfo->d_name, Signature))
{
continue;
}
if (strlen (DirInfo->d_name) > 4)
{
sscanf (DirInfo->d_name, "%[^1-9]%d", TempName, &CurrentInstance);
if (CurrentInstance != Instance)
{
continue;
}
}
/* Create the table pathname and open the file */
sprintf (TableFilename, "%s/%s", OVERRIDE_TABLE_DIR, DirInfo->d_name);
TableFile = fopen (TableFilename, "rb");
if (TableFile == NULL)
{
perror (TableFilename);
return (AE_ERROR);
}
/* Read the Table header to get the table length */
Count = fread (&Header, 1, sizeof (ACPI_TABLE_HEADER), TableFile);
if (Count != sizeof (ACPI_TABLE_HEADER))
{
fclose (TableFile);
return (AE_ERROR);
}
break;
}
closedir (TableDir);
if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_SSDT) && !TableFile)
{
return (AE_LIMIT);
}
if (!TableFile)
{
return (AE_NOT_FOUND);
}
/* There is no physical address saved for override tables, use zero */
*Address = 0;
Status = OslReadTableFromFile (TableFile, 0, NULL, Table);
fclose (TableFile);
return (Status);
}
/******************************************************************************
*
* FUNCTION: OslGetDynamicSsdt
*
* PARAMETERS: Instance - For SSDTs (0...n)
* Table - Where a pointer to the table is returned
* Address - Where the table physical address is returned
*
* RETURN: Status; Table buffer is returned if AE_OK.
* AE_NOT_FOUND: A valid table was not found at the address
*
* DESCRIPTION: Get an SSDT table under directory DYNAMIC_SSDT_DIR.
*
*****************************************************************************/
static ACPI_STATUS
OslGetDynamicSsdt (
UINT32 Instance,
ACPI_TABLE_HEADER **Table,
ACPI_PHYSICAL_ADDRESS *Address)
{
ACPI_TABLE_HEADER Header;
struct stat FileInfo;
struct dirent *DirInfo;
DIR *TableDir;
FILE *TableFile = NULL;
UINT32 Count;
UINT32 CurrentInstance = 0;
char TempName[4];
char TableFilename[PATH_MAX];
ACPI_STATUS Status;
/* Open the directory for dynamically loaded SSDTs */
if (stat (DYNAMIC_SSDT_DIR, &FileInfo) == -1)
{
return (AE_NOT_FOUND);
}
if (!(TableDir = opendir (DYNAMIC_SSDT_DIR)))
{
return (AE_ERROR);
}
/* Search directory for correct SSDT instance */
while ((DirInfo = readdir (TableDir)) != 0)
{
/* Ignore meaningless files */
if (DirInfo->d_name[0] == '.')
{
continue;
}
/* Check if this table is what we need */
sscanf (DirInfo->d_name, "%[^1-9]%d", TempName, &CurrentInstance);
if (CurrentInstance != Instance)
{
continue;
}
/* Get the SSDT filename and open the file */
sprintf (TableFilename, "%s/%s", DYNAMIC_SSDT_DIR, DirInfo->d_name);
TableFile = fopen (TableFilename, "rb");
if (TableFile == NULL)
{
perror (TableFilename);
return (AE_ERROR);
}
/* Read the Table header to get the table length */
Count = fread (&Header, 1, sizeof (ACPI_TABLE_HEADER), TableFile);
if (Count != sizeof (ACPI_TABLE_HEADER))
{
fclose (TableFile);
return (AE_ERROR);
}
break;
}
closedir (TableDir);
if (CurrentInstance != Instance)
{
return (AE_LIMIT);
}
/* There is no physical address saved for dynamic SSDTs, use zero */
*Address = 0;
Status = OslReadTableFromFile (TableFile, Header.Length, NULL, Table);
fclose (TableFile);
return (Status);
}
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