static u8
acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
{
acpi_status status = AE_OK;
u8 is_identical;
struct acpi_table_header *table;
u32 table_length;
u8 table_flags;
status =
acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
&table, &table_length, &table_flags);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
is_identical = (u8)((table_desc->length != table_length ||
ACPI_MEMCMP(table_desc->pointer, table,
table_length)) ? FALSE : TRUE);
/* Release the acquired table */
acpi_tb_release_table(table, table_length, table_flags);
return (is_identical);
}
static BOOLEAN
AcpiTbCompareTables (
ACPI_TABLE_DESC *TableDesc,
UINT32 TableIndex)
{
ACPI_STATUS Status = AE_OK;
BOOLEAN IsIdentical;
ACPI_TABLE_HEADER *Table;
UINT32 TableLength;
UINT8 TableFlags;
Status = AcpiTbAcquireTable (&AcpiGbl_RootTableList.Tables[TableIndex],
&Table, &TableLength, &TableFlags);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
IsIdentical = (BOOLEAN)((TableDesc->Length != TableLength ||
ACPI_MEMCMP (TableDesc->Pointer, Table, TableLength)) ?
FALSE : TRUE);
/* Release the acquired table */
AcpiTbReleaseTable (Table, TableLength, TableFlags);
return (IsIdentical);
}
static ACPI_STATUS
AcpiRsMatchVendorResource (
ACPI_RESOURCE *Resource,
void *Context)
{
ACPI_VENDOR_WALK_INFO *Info = Context;
ACPI_RESOURCE_VENDOR_TYPED *Vendor;
ACPI_BUFFER *Buffer;
ACPI_STATUS Status;
/* Ignore all descriptors except Vendor */
if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR)
{
return (AE_OK);
}
Vendor = &Resource->Data.VendorTyped;
/*
* For a valid match, these conditions must hold:
*
* 1) Length of descriptor data must be at least as long as a UUID struct
* 2) The UUID subtypes must match
* 3) The UUID data must match
*/
if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) ||
(Vendor->UuidSubtype != Info->Uuid->Subtype) ||
(ACPI_MEMCMP (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH)))
{
return (AE_OK);
}
/* Validate/Allocate/Clear caller buffer */
Buffer = Info->Buffer;
Status = AcpiUtInitializeBuffer (Buffer, Resource->Length);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Found the correct resource, copy and return it */
ACPI_MEMCPY (Buffer->Pointer, Resource, Resource->Length);
Buffer->Length = Resource->Length;
/* Found the desired descriptor, terminate resource walk */
Info->Status = AE_OK;
return (AE_CTRL_TERMINATE);
}
acpi_status acpi_tb_is_table_installed(struct acpi_table_desc *new_table_desc)
{
struct acpi_table_desc *table_desc;
ACPI_FUNCTION_TRACE("tb_is_table_installed");
/* Get the list descriptor and first table descriptor */
table_desc = acpi_gbl_table_lists[new_table_desc->type].next;
/* Examine all installed tables of this type */
while (table_desc) {
/*
* If the table lengths match, perform a full bytewise compare. This
* means that we will allow tables with duplicate oem_table_id(s), as
* long as the tables are different in some way.
*
* Checking if the table has been loaded into the namespace means that
* we don't check for duplicate tables during the initial installation
* of tables within the RSDT/XSDT.
*/
if ((table_desc->loaded_into_namespace) &&
(table_desc->pointer->length ==
new_table_desc->pointer->length)
&&
(!ACPI_MEMCMP
((const char *)table_desc->pointer,
(const char *)new_table_desc->pointer,
(acpi_size) new_table_desc->pointer->length))) {
/* Match: this table is already installed */
ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
"Table [%4.4s] already installed: Rev %X oem_table_id [%8.8s]\n",
new_table_desc->pointer->signature,
new_table_desc->pointer->revision,
new_table_desc->pointer->
oem_table_id));
new_table_desc->owner_id = table_desc->owner_id;
new_table_desc->installed_desc = table_desc;
return_ACPI_STATUS(AE_ALREADY_EXISTS);
}
/* Get next table on the list */
table_desc = table_desc->next;
}
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_match_vendor_resource
*
* PARAMETERS: acpi_walk_resource_callback
*
* RETURN: Status
*
* DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID
*
******************************************************************************/
static acpi_status
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
{
struct acpi_vendor_walk_info *info = context;
struct acpi_resource_vendor_typed *vendor;
struct acpi_buffer *buffer;
acpi_status status;
/* Ignore all descriptors except Vendor */
if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) {
return (AE_OK);
}
vendor = &resource->data.vendor_typed;
/*
* For a valid match, these conditions must hold:
*
* 1) Length of descriptor data must be at least as long as a UUID struct
* 2) The UUID subtypes must match
* 3) The UUID data must match
*/
if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) ||
(vendor->uuid_subtype != info->uuid->subtype) ||
(ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) {
return (AE_OK);
}
/* Validate/Allocate/Clear caller buffer */
buffer = info->buffer;
status = acpi_ut_initialize_buffer(buffer, resource->length);
if (ACPI_FAILURE(status)) {
return (status);
}
/* Found the correct resource, copy and return it */
ACPI_MEMCPY(buffer->pointer, resource, resource->length);
buffer->length = resource->length;
/* Found the desired descriptor, terminate resource walk */
info->status = AE_OK;
return (AE_CTRL_TERMINATE);
}
static acpi_status
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
{
struct acpi_vendor_walk_info *info = context;
struct acpi_resource_vendor_typed *vendor;
struct acpi_buffer *buffer;
acpi_status status;
if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) {
return (AE_OK);
}
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) ||
(vendor->uuid_subtype != info->uuid->subtype) ||
(ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) {
return (AE_OK);
}
buffer = info->buffer;
status = acpi_ut_initialize_buffer(buffer, resource->length);
if (ACPI_FAILURE(status)) {
return (status);
}
ACPI_MEMCPY(buffer->pointer, resource, resource->length);
buffer->length = resource->length;
info->status = AE_OK;
return (AE_CTRL_TERMINATE);
}
const char *
AcpiAhMatchUuid (
UINT8 *Data)
{
const AH_UUID *Info;
UINT8 UuidBuffer[UUID_BUFFER_LENGTH];
/* Walk the table of known ACPI-related UUIDs */
for (Info = AcpiUuids; Info->Description; Info++)
{
AcpiUtConvertStringToUuid (Info->String, UuidBuffer);
if (!ACPI_MEMCMP (Data, UuidBuffer, UUID_BUFFER_LENGTH))
{
return (Info->Description);
}
}
return (NULL);
}
acpi_status
acpi_tb_find_table(char *signature,
char *oem_id, char *oem_table_id, u32 *table_index)
{
u32 i;
acpi_status status;
struct acpi_table_header header;
ACPI_FUNCTION_TRACE(tb_find_table);
/* */
ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header));
ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE);
ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
/* */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
header.signature, ACPI_NAME_SIZE)) {
/* */
continue;
}
/* */
if (!acpi_gbl_root_table_list.tables[i].pointer) {
/* */
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (!acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
/* */
if (!ACPI_MEMCMP
(acpi_gbl_root_table_list.tables[i].pointer->signature,
header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
||
!ACPI_MEMCMP
(acpi_gbl_root_table_list.
tables[i].pointer->
oem_id,
header.oem_id,
ACPI_OEM_ID_SIZE))
&& (!oem_table_id[0]
|| !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i].
pointer->oem_table_id,
header.oem_table_id,
ACPI_OEM_TABLE_ID_SIZE))) {
*table_index = i;
ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
"Found table [%4.4s]\n",
header.signature));
return_ACPI_STATUS(AE_OK);
}
}
return_ACPI_STATUS(AE_NOT_FOUND);
}
acpi_status
acpi_ex_do_logical_op (
u16 opcode,
union acpi_operand_object *operand0,
union acpi_operand_object *operand1,
u8 *logical_result)
{
union acpi_operand_object *local_operand1 = operand1;
acpi_integer integer0;
acpi_integer integer1;
u32 length0;
u32 length1;
acpi_status status = AE_OK;
u8 local_result = FALSE;
int compare;
ACPI_FUNCTION_TRACE ("ex_do_logical_op");
/*
* Convert the second operand if necessary. The first operand
* determines the type of the second operand, (See the Data Types
* section of the ACPI 3.0+ specification.) Both object types are
* guaranteed to be either Integer/String/Buffer by the operand
* resolution mechanism.
*/
switch (ACPI_GET_OBJECT_TYPE (operand0)) {
case ACPI_TYPE_INTEGER:
status = acpi_ex_convert_to_integer (operand1, &local_operand1, 16);
break;
case ACPI_TYPE_STRING:
status = acpi_ex_convert_to_string (operand1, &local_operand1,
ACPI_IMPLICIT_CONVERT_HEX);
break;
case ACPI_TYPE_BUFFER:
status = acpi_ex_convert_to_buffer (operand1, &local_operand1);
break;
default:
status = AE_AML_INTERNAL;
break;
}
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/*
* Two cases: 1) Both Integers, 2) Both Strings or Buffers
*/
if (ACPI_GET_OBJECT_TYPE (operand0) == ACPI_TYPE_INTEGER) {
/*
* 1) Both operands are of type integer
* Note: local_operand1 may have changed above
*/
integer0 = operand0->integer.value;
integer1 = local_operand1->integer.value;
switch (opcode) {
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
if (integer0 == integer1) {
local_result = TRUE;
}
break;
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
if (integer0 > integer1) {
local_result = TRUE;
}
break;
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
if (integer0 < integer1) {
local_result = TRUE;
}
break;
default:
status = AE_AML_INTERNAL;
break;
}
}
else {
/*
* 2) Both operands are Strings or both are Buffers
* Note: Code below takes advantage of common Buffer/String
* object fields. local_operand1 may have changed above. Use
* memcmp to handle nulls in buffers.
*/
length0 = operand0->buffer.length;
length1 = local_operand1->buffer.length;
/* Lexicographic compare: compare the data bytes */
compare = ACPI_MEMCMP ((const char * ) operand0->buffer.pointer,
(const char * ) local_operand1->buffer.pointer,
(length0 > length1) ? length1 : length0);
switch (opcode) {
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
/* Length and all bytes must be equal */
if ((length0 == length1) &&
(compare == 0)) {
/* Length and all bytes match ==> TRUE */
local_result = TRUE;
}
break;
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
if (compare > 0) {
local_result = TRUE;
goto cleanup; /* TRUE */
}
if (compare < 0) {
goto cleanup; /* FALSE */
}
/* Bytes match (to shortest length), compare lengths */
if (length0 > length1) {
local_result = TRUE;
}
break;
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
if (compare > 0) {
goto cleanup; /* FALSE */
}
if (compare < 0) {
local_result = TRUE;
goto cleanup; /* TRUE */
}
/* Bytes match (to shortest length), compare lengths */
if (length0 < length1) {
local_result = TRUE;
}
break;
default:
status = AE_AML_INTERNAL;
break;
}
}
cleanup:
/* New object was created if implicit conversion performed - delete */
if (local_operand1 != operand1) {
acpi_ut_remove_reference (local_operand1);
}
/* Return the logical result and status */
*logical_result = local_result;
return_ACPI_STATUS (status);
}
void
AcpiDbDumpPldBuffer (
ACPI_OBJECT *ObjDesc)
{
ACPI_OBJECT *BufferDesc;
ACPI_PLD_INFO *PldInfo;
UINT8 *NewBuffer;
ACPI_STATUS Status;
/* Object must be of type Package with at least one Buffer element */
if (ObjDesc->Type != ACPI_TYPE_PACKAGE)
{
return;
}
BufferDesc = &ObjDesc->Package.Elements[0];
if (BufferDesc->Type != ACPI_TYPE_BUFFER)
{
return;
}
/* Convert _PLD buffer to local _PLD struct */
Status = AcpiDecodePldBuffer (BufferDesc->Buffer.Pointer,
BufferDesc->Buffer.Length, &PldInfo);
if (ACPI_FAILURE (Status))
{
return;
}
/* Encode local _PLD struct back to a _PLD buffer */
NewBuffer = AcpiDbEncodePldBuffer (PldInfo);
if (!NewBuffer)
{
return;
}
/* The two bit-packed buffers should match */
if (ACPI_MEMCMP (NewBuffer, BufferDesc->Buffer.Pointer,
BufferDesc->Buffer.Length))
{
AcpiOsPrintf ("Converted _PLD buffer does not compare. New:\n");
AcpiUtDumpBuffer (NewBuffer,
BufferDesc->Buffer.Length, DB_BYTE_DISPLAY, 0);
}
/* First 32-bit dword */
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Revision", PldInfo->Revision);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_IgnoreColor", PldInfo->IgnoreColor);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Red", PldInfo->Red);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Green", PldInfo->Green);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Blue", PldInfo->Blue);
/* Second 32-bit dword */
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Width", PldInfo->Width);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Height", PldInfo->Height);
/* Third 32-bit dword */
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_UserVisible", PldInfo->UserVisible);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Dock", PldInfo->Dock);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Lid", PldInfo->Lid);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Panel", PldInfo->Panel);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_VerticalPosition", PldInfo->VerticalPosition);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_HorizontalPosition", PldInfo->HorizontalPosition);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Shape", PldInfo->Shape);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_GroupOrientation", PldInfo->GroupOrientation);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_GroupToken", PldInfo->GroupToken);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_GroupPosition", PldInfo->GroupPosition);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Bay", PldInfo->Bay);
/* Fourth 32-bit dword */
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Ejectable", PldInfo->Ejectable);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_EjectRequired", PldInfo->OspmEjectRequired);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_CabinetNumber", PldInfo->CabinetNumber);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_CardCageNumber", PldInfo->CardCageNumber);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Reference", PldInfo->Reference);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Rotation", PldInfo->Rotation);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_Order", PldInfo->Order);
/* Fifth 32-bit dword */
if (BufferDesc->Buffer.Length > 16)
{
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_VerticalOffset", PldInfo->VerticalOffset);
AcpiOsPrintf (ACPI_PLD_OUTPUT, "PLD_HorizontalOffset", PldInfo->HorizontalOffset);
}
ACPI_FREE (PldInfo);
ACPI_FREE (NewBuffer);
}
ACPI_STATUS
AcpiExDoLogicalOp (
UINT16 Opcode,
ACPI_OPERAND_OBJECT *Operand0,
ACPI_OPERAND_OBJECT *Operand1,
BOOLEAN *LogicalResult)
{
ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1;
ACPI_INTEGER Integer0;
ACPI_INTEGER Integer1;
UINT32 Length0;
UINT32 Length1;
ACPI_STATUS Status = AE_OK;
BOOLEAN LocalResult = FALSE;
int Compare;
ACPI_FUNCTION_TRACE (ExDoLogicalOp);
/*
* Convert the second operand if necessary. The first operand
* determines the type of the second operand, (See the Data Types
* section of the ACPI 3.0+ specification.) Both object types are
* guaranteed to be either Integer/String/Buffer by the operand
* resolution mechanism.
*/
switch (ACPI_GET_OBJECT_TYPE (Operand0))
{
case ACPI_TYPE_INTEGER:
Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16);
break;
case ACPI_TYPE_STRING:
Status = AcpiExConvertToString (Operand1, &LocalOperand1,
ACPI_IMPLICIT_CONVERT_HEX);
break;
case ACPI_TYPE_BUFFER:
Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);
break;
default:
Status = AE_AML_INTERNAL;
break;
}
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/*
* Two cases: 1) Both Integers, 2) Both Strings or Buffers
*/
if (ACPI_GET_OBJECT_TYPE (Operand0) == ACPI_TYPE_INTEGER)
{
/*
* 1) Both operands are of type integer
* Note: LocalOperand1 may have changed above
*/
Integer0 = Operand0->Integer.Value;
Integer1 = LocalOperand1->Integer.Value;
switch (Opcode)
{
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
if (Integer0 == Integer1)
{
LocalResult = TRUE;
}
break;
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
if (Integer0 > Integer1)
{
LocalResult = TRUE;
}
break;
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
if (Integer0 < Integer1)
{
LocalResult = TRUE;
}
break;
default:
Status = AE_AML_INTERNAL;
break;
}
}
else
{
/*
* 2) Both operands are Strings or both are Buffers
* Note: Code below takes advantage of common Buffer/String
* object fields. LocalOperand1 may have changed above. Use
* memcmp to handle nulls in buffers.
*/
Length0 = Operand0->Buffer.Length;
Length1 = LocalOperand1->Buffer.Length;
/* Lexicographic compare: compare the data bytes */
Compare = ACPI_MEMCMP (Operand0->Buffer.Pointer,
LocalOperand1->Buffer.Pointer,
(Length0 > Length1) ? Length1 : Length0);
switch (Opcode)
{
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
/* Length and all bytes must be equal */
if ((Length0 == Length1) &&
(Compare == 0))
{
/* Length and all bytes match ==> TRUE */
LocalResult = TRUE;
}
break;
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
if (Compare > 0)
{
LocalResult = TRUE;
goto Cleanup; /* TRUE */
}
if (Compare < 0)
{
goto Cleanup; /* FALSE */
}
/* Bytes match (to shortest length), compare lengths */
if (Length0 > Length1)
{
LocalResult = TRUE;
}
break;
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
if (Compare > 0)
{
goto Cleanup; /* FALSE */
}
if (Compare < 0)
{
LocalResult = TRUE;
goto Cleanup; /* TRUE */
}
/* Bytes match (to shortest length), compare lengths */
if (Length0 < Length1)
{
LocalResult = TRUE;
}
break;
default:
Status = AE_AML_INTERNAL;
break;
}
}
Cleanup:
/* New object was created if implicit conversion performed - delete */
if (LocalOperand1 != Operand1)
{
AcpiUtRemoveReference (LocalOperand1);
}
/* Return the logical result and status */
*LogicalResult = LocalResult;
return_ACPI_STATUS (Status);
}
static void
AcpiDmCompareAmlResources (
UINT8 *Aml1Buffer,
ACPI_RSDESC_SIZE Aml1BufferLength,
UINT8 *Aml2Buffer,
ACPI_RSDESC_SIZE Aml2BufferLength)
{
UINT8 *Aml1;
UINT8 *Aml2;
UINT8 *Aml1End;
UINT8 *Aml2End;
ACPI_RSDESC_SIZE Aml1Length;
ACPI_RSDESC_SIZE Aml2Length;
ACPI_RSDESC_SIZE Offset = 0;
UINT8 ResourceType;
UINT32 Count = 0;
UINT32 i;
/* Compare overall buffer sizes (may be different due to size rounding) */
if (Aml1BufferLength != Aml2BufferLength)
{
AcpiOsPrintf (
"**** Buffer length mismatch in converted AML: Original %X, New %X ****\n",
Aml1BufferLength, Aml2BufferLength);
}
Aml1 = Aml1Buffer;
Aml2 = Aml2Buffer;
Aml1End = Aml1Buffer + Aml1BufferLength;
Aml2End = Aml2Buffer + Aml2BufferLength;
/* Walk the descriptor lists, comparing each descriptor */
while ((Aml1 < Aml1End) && (Aml2 < Aml2End))
{
/* Get the lengths of each descriptor */
Aml1Length = AcpiUtGetDescriptorLength (Aml1);
Aml2Length = AcpiUtGetDescriptorLength (Aml2);
ResourceType = AcpiUtGetResourceType (Aml1);
/* Check for descriptor length match */
if (Aml1Length != Aml2Length)
{
AcpiOsPrintf (
"**** Length mismatch in descriptor [%.2X] type %2.2X, Offset %8.8X Len1 %X, Len2 %X ****\n",
Count, ResourceType, Offset, Aml1Length, Aml2Length);
}
/* Check for descriptor byte match */
else if (ACPI_MEMCMP (Aml1, Aml2, Aml1Length))
{
AcpiOsPrintf (
"**** Data mismatch in descriptor [%.2X] type %2.2X, Offset %8.8X ****\n",
Count, ResourceType, Offset);
for (i = 0; i < Aml1Length; i++)
{
if (Aml1[i] != Aml2[i])
{
AcpiOsPrintf ("Mismatch at byte offset %.2X: is %2.2X, should be %2.2X\n",
i, Aml2[i], Aml1[i]);
}
}
}
/* Exit on EndTag descriptor */
if (ResourceType == ACPI_RESOURCE_NAME_END_TAG)
{
return;
}
/* Point to next descriptor in each buffer */
Count++;
Offset += Aml1Length;
Aml1 += Aml1Length;
Aml2 += Aml2Length;
}
}
acpi_status
acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
{
u32 i;
acpi_status status = AE_OK;
struct acpi_table_header *override_table = NULL;
ACPI_FUNCTION_TRACE(tb_add_table);
if (!table_desc->pointer) {
status = acpi_tb_verify_table(table_desc);
if (ACPI_FAILURE(status) || !table_desc->pointer) {
return_ACPI_STATUS(status);
}
}
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
if (!acpi_gbl_root_table_list.tables[i].pointer) {
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)
|| !acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
if (table_desc->length !=
acpi_gbl_root_table_list.tables[i].length) {
continue;
}
if (ACPI_MEMCMP(table_desc->pointer,
acpi_gbl_root_table_list.tables[i].pointer,
acpi_gbl_root_table_list.tables[i].length)) {
continue;
}
acpi_tb_delete_table(table_desc);
*table_index = i;
if (acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_IS_LOADED) {
status = AE_ALREADY_EXISTS;
goto release;
} else {
table_desc->pointer =
acpi_gbl_root_table_list.tables[i].pointer;
table_desc->address =
acpi_gbl_root_table_list.tables[i].address;
status = AE_OK;
goto print_header;
}
}
status = acpi_os_table_override(table_desc->pointer, &override_table);
if (ACPI_SUCCESS(status) && override_table) {
ACPI_INFO((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
table_desc->pointer->signature,
ACPI_CAST_PTR(void, table_desc->address)));
acpi_tb_delete_table(table_desc);
table_desc->address = ACPI_PTR_TO_PHYSADDR(override_table);
table_desc->pointer = override_table;
table_desc->length = override_table->length;
table_desc->flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
acpi_status
acpi_tb_find_table(char *signature,
char *oem_id, char *oem_table_id, u32 *table_index)
{
u32 i;
acpi_status status;
struct acpi_table_header header;
ACPI_FUNCTION_TRACE(tb_find_table);
/* Normalize the input strings */
ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header));
ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE);
ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
/* Search for the table */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
header.signature, ACPI_NAME_SIZE)) {
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!acpi_gbl_root_table_list.tables[i].pointer) {
/* Table is not currently mapped, map it */
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (!acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
/* Check for table match on all IDs */
if (!ACPI_MEMCMP
(acpi_gbl_root_table_list.tables[i].pointer->signature,
header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
||
!ACPI_MEMCMP
(acpi_gbl_root_table_list.
tables[i].pointer->
oem_id,
header.oem_id,
ACPI_OEM_ID_SIZE))
&& (!oem_table_id[0]
|| !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i].
pointer->oem_table_id,
header.oem_table_id,
ACPI_OEM_TABLE_ID_SIZE))) {
*table_index = i;
ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
"Found table [%4.4s]\n",
header.signature));
return_ACPI_STATUS(AE_OK);
}
}
return_ACPI_STATUS(AE_NOT_FOUND);
}
static ACPI_STATUS
AcpiDbTestBufferType (
ACPI_NAMESPACE_NODE *Node,
UINT32 BitLength)
{
ACPI_OBJECT *Temp1 = NULL;
ACPI_OBJECT *Temp2 = NULL;
ACPI_OBJECT *Temp3 = NULL;
UINT8 *Buffer;
ACPI_OBJECT WriteValue;
ACPI_STATUS Status;
UINT32 ByteLength;
UINT32 i;
UINT8 ExtraBits;
ByteLength = ACPI_ROUND_BITS_UP_TO_BYTES (BitLength);
if (ByteLength == 0)
{
AcpiOsPrintf (" Ignoring zero length buffer");
return (AE_OK);
}
/* Allocate a local buffer */
Buffer = ACPI_ALLOCATE_ZEROED (ByteLength);
if (!Buffer)
{
return (AE_NO_MEMORY);
}
/* Read the original value */
Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp1);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Emit a few bytes of the buffer */
AcpiOsPrintf (" (%4.4X/%3.3X)", BitLength, Temp1->Buffer.Length);
for (i = 0; ((i < 4) && (i < ByteLength)); i++)
{
AcpiOsPrintf (" %2.2X", Temp1->Buffer.Pointer[i]);
}
AcpiOsPrintf ("... ");
/*
* Write a new value.
*
* Handle possible extra bits at the end of the buffer. Can
* happen for FieldUnits larger than an integer, but the bit
* count is not an integral number of bytes. Zero out the
* unused bits.
*/
ACPI_MEMSET (Buffer, BUFFER_FILL_VALUE, ByteLength);
ExtraBits = BitLength % 8;
if (ExtraBits)
{
Buffer [ByteLength - 1] = ACPI_MASK_BITS_ABOVE (ExtraBits);
}
WriteValue.Type = ACPI_TYPE_BUFFER;
WriteValue.Buffer.Length = ByteLength;
WriteValue.Buffer.Pointer = Buffer;
Status = AcpiDbWriteToObject (Node, &WriteValue);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Ensure that we can read back the new value */
Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp2);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
if (ACPI_MEMCMP (Temp2->Buffer.Pointer, Buffer, ByteLength))
{
AcpiOsPrintf (" MISMATCH 2: New buffer value");
}
/* Write back the original value */
WriteValue.Buffer.Length = ByteLength;
WriteValue.Buffer.Pointer = Temp1->Buffer.Pointer;
Status = AcpiDbWriteToObject (Node, &WriteValue);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Ensure that we can read back the original value */
Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp3);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
if (ACPI_MEMCMP (Temp1->Buffer.Pointer, Temp3->Buffer.Pointer, ByteLength))
{
AcpiOsPrintf (" MISMATCH 3: While restoring original buffer");
}
Exit:
ACPI_FREE (Buffer);
if (Temp1) {AcpiOsFree (Temp1);}
if (Temp2) {AcpiOsFree (Temp2);}
if (Temp3) {AcpiOsFree (Temp3);}
return (Status);
}
ACPI_STATUS
AcpiTbFindTable (
char *Signature,
char *OemId,
char *OemTableId,
ACPI_NATIVE_UINT *TableIndex)
{
ACPI_NATIVE_UINT i;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (TbFindTable);
for (i = 0; i < AcpiGbl_RootTableList.Count; ++i)
{
if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature),
Signature, ACPI_NAME_SIZE))
{
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
/* Table is not currently mapped, map it */
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/* Check for table match on all IDs */
if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
Signature, ACPI_NAME_SIZE) &&
(!OemId[0] ||
!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
OemId, ACPI_OEM_ID_SIZE)) &&
(!OemTableId[0] ||
!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
{
*TableIndex = i;
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
Signature));
return_ACPI_STATUS (AE_OK);
}
}
return_ACPI_STATUS (AE_NOT_FOUND);
}
acpi_status
acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
{
u32 i;
acpi_status status = AE_OK;
struct acpi_table_header *override_table = NULL;
ACPI_FUNCTION_TRACE(tb_add_table);
if (!table_desc->pointer) {
status = acpi_tb_verify_table(table_desc);
if (ACPI_FAILURE(status) || !table_desc->pointer) {
return_ACPI_STATUS(status);
}
}
/*
* Originally, we checked the table signature for "SSDT" or "PSDT" here.
* Next, we added support for OEMx tables, signature "OEM".
* Valid tables were encountered with a null signature, so we've just
* given up on validating the signature, since it seems to be a waste
* of code. The original code was removed (05/2008).
*/
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (!acpi_gbl_root_table_list.tables[i].pointer) {
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)
|| !acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (table_desc->length !=
acpi_gbl_root_table_list.tables[i].length) {
continue;
}
if (ACPI_MEMCMP(table_desc->pointer,
acpi_gbl_root_table_list.tables[i].pointer,
acpi_gbl_root_table_list.tables[i].length)) {
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
acpi_tb_delete_table(table_desc);
*table_index = i;
if (acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_IS_LOADED) {
/* Table is still loaded, this is an error */
status = AE_ALREADY_EXISTS;
goto release;
} else {
/* Table was unloaded, allow it to be reloaded */
table_desc->pointer =
acpi_gbl_root_table_list.tables[i].pointer;
table_desc->address =
acpi_gbl_root_table_list.tables[i].address;
status = AE_OK;
goto print_header;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
*/
status = acpi_os_table_override(table_desc->pointer, &override_table);
if (ACPI_SUCCESS(status) && override_table) {
ACPI_INFO((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
table_desc->pointer->signature,
ACPI_CAST_PTR(void, table_desc->address)));
/* We can delete the table that was passed as a parameter */
acpi_tb_delete_table(table_desc);
/* Setup descriptor for the new table */
table_desc->address = ACPI_PTR_TO_PHYSADDR(override_table);
table_desc->pointer = override_table;
table_desc->length = override_table->length;
table_desc->flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
acpi_status
acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
{
u32 i;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_add_table);
if (!table_desc->pointer) {
status = acpi_tb_verify_table(table_desc);
if (ACPI_FAILURE(status) || !table_desc->pointer) {
return_ACPI_STATUS(status);
}
}
if ((table_desc->pointer->signature[0] != 0x00) &&
(!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
&& (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
ACPI_ERROR((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
acpi_ut_valid_acpi_name(*(u32 *)table_desc->
pointer->
signature) ? table_desc->
pointer->signature : "????",
*(u32 *)table_desc->pointer->signature));
return_ACPI_STATUS(AE_BAD_SIGNATURE);
}
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (!acpi_gbl_root_table_list.tables[i].pointer) {
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)
|| !acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
if (table_desc->length !=
acpi_gbl_root_table_list.tables[i].length) {
continue;
}
if (ACPI_MEMCMP(table_desc->pointer,
acpi_gbl_root_table_list.tables[i].pointer,
acpi_gbl_root_table_list.tables[i].length)) {
continue;
}
acpi_tb_delete_table(table_desc);
*table_index = i;
if (acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_IS_LOADED) {
status = AE_ALREADY_EXISTS;
goto release;
} else {
table_desc->pointer =
acpi_gbl_root_table_list.tables[i].pointer;
table_desc->address =
acpi_gbl_root_table_list.tables[i].address;
status = AE_OK;
goto print_header;
}
}
(void)acpi_tb_table_override(table_desc->pointer, table_desc);
status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
table_desc->length, table_desc->flags,
table_index);
if (ACPI_FAILURE(status)) {
goto release;
}
print_header:
acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
release:
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
ACPI_STATUS
AcpiTbFindTable (
char *Signature,
char *OemId,
char *OemTableId,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status;
ACPI_TABLE_HEADER Header;
ACPI_FUNCTION_TRACE (TbFindTable);
/* Normalize the input strings */
ACPI_MEMSET (&Header, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_MOVE_NAME (Header.Signature, Signature);
ACPI_STRNCPY (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
ACPI_STRNCPY (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
/* Search for the table */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature),
Header.Signature, ACPI_NAME_SIZE))
{
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
/* Table is not currently mapped, map it */
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/* Check for table match on all IDs */
if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
Header.Signature, ACPI_NAME_SIZE) &&
(!OemId[0] ||
!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
Header.OemId, ACPI_OEM_ID_SIZE)) &&
(!OemTableId[0] ||
!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
{
*TableIndex = i;
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
Header.Signature));
return_ACPI_STATUS (AE_OK);
}
}
return_ACPI_STATUS (AE_NOT_FOUND);
}
acpi_status
acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
{
u32 i;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_add_table);
if (!table_desc->pointer) {
status = acpi_tb_verify_table(table_desc);
if (ACPI_FAILURE(status) || !table_desc->pointer) {
return_ACPI_STATUS(status);
}
}
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((table_desc->pointer->signature[0] != 0x00) &&
(!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
&& (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
ACPI_ERROR((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
acpi_ut_valid_acpi_name(*(u32 *)table_desc->
pointer->
signature) ? table_desc->
pointer->signature : "????",
*(u32 *)table_desc->pointer->signature));
return_ACPI_STATUS(AE_BAD_SIGNATURE);
}
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (!acpi_gbl_root_table_list.tables[i].pointer) {
status =
acpi_tb_verify_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)
|| !acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (table_desc->length !=
acpi_gbl_root_table_list.tables[i].length) {
continue;
}
if (ACPI_MEMCMP(table_desc->pointer,
acpi_gbl_root_table_list.tables[i].pointer,
acpi_gbl_root_table_list.tables[i].length)) {
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
acpi_tb_delete_table(table_desc);
*table_index = i;
if (acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_IS_LOADED) {
/* Table is still loaded, this is an error */
status = AE_ALREADY_EXISTS;
goto release;
} else {
/* Table was unloaded, allow it to be reloaded */
table_desc->pointer =
acpi_gbl_root_table_list.tables[i].pointer;
table_desc->address =
acpi_gbl_root_table_list.tables[i].address;
status = AE_OK;
goto print_header;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
* NOTE: the table is fully mapped at this point, and the mapping will
* be deleted by tb_table_override if the table is actually overridden.
*/
(void)acpi_tb_table_override(table_desc->pointer, table_desc);
/* Add the table to the global root table list */
status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
table_desc->length, table_desc->flags,
table_index);
if (ACPI_FAILURE(status)) {
goto release;
}
print_header:
acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
release:
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
ACPI_STATUS
AcpiTbAddTable (
ACPI_TABLE_DESC *TableDesc,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbAddTable);
if (!TableDesc->Pointer)
{
Status = AcpiTbVerifyTable (TableDesc);
if (ACPI_FAILURE (Status) || !TableDesc->Pointer)
{
return_ACPI_STATUS (Status);
}
}
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((TableDesc->Pointer->Signature[0] != 0x00) &&
(!ACPI_COMPARE_NAME (TableDesc->Pointer->Signature, ACPI_SIG_SSDT)) &&
(ACPI_STRNCMP (TableDesc->Pointer->Signature, "OEM", 3)))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), "
"must be SSDT or OEMx",
AcpiUtValidAcpiName (TableDesc->Pointer->Signature) ?
TableDesc->Pointer->Signature : "????",
*(UINT32 *) TableDesc->Pointer->Signature));
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status) ||
!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (TableDesc->Length != AcpiGbl_RootTableList.Tables[i].Length)
{
continue;
}
if (ACPI_MEMCMP (TableDesc->Pointer,
AcpiGbl_RootTableList.Tables[i].Pointer,
AcpiGbl_RootTableList.Tables[i].Length))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
AcpiTbDeleteTable (TableDesc);
*TableIndex = i;
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto Release;
}
else
{
/* Table was unloaded, allow it to be reloaded */
TableDesc->Pointer = AcpiGbl_RootTableList.Tables[i].Pointer;
TableDesc->Address = AcpiGbl_RootTableList.Tables[i].Address;
Status = AE_OK;
goto PrintHeader;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
* NOTE: the table is fully mapped at this point, and the mapping will
* be deleted by TbTableOverride if the table is actually overridden.
*/
(void) AcpiTbTableOverride (TableDesc->Pointer, TableDesc);
/* Add the table to the global root table list */
Status = AcpiTbStoreTable (TableDesc->Address, TableDesc->Pointer,
TableDesc->Length, TableDesc->Flags, TableIndex);
if (ACPI_FAILURE (Status))
{
goto Release;
}
PrintHeader:
AcpiTbPrintTableHeader (TableDesc->Address, TableDesc->Pointer);
Release:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiTbAddTable (
ACPI_TABLE_DESC *TableDesc,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER *OverrideTable = NULL;
ACPI_FUNCTION_TRACE (TbAddTable);
if (!TableDesc->Pointer)
{
Status = AcpiTbVerifyTable (TableDesc);
if (ACPI_FAILURE (Status) || !TableDesc->Pointer)
{
return_ACPI_STATUS (Status);
}
}
/*
* Originally, we checked the table signature for "SSDT" or "PSDT" here.
* Next, we added support for OEMx tables, signature "OEM".
* Valid tables were encountered with a null signature, so we've just
* given up on validating the signature, since it seems to be a waste
* of code. The original code was removed (05/2008).
*/
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status) ||
!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (TableDesc->Length != AcpiGbl_RootTableList.Tables[i].Length)
{
continue;
}
if (ACPI_MEMCMP (TableDesc->Pointer,
AcpiGbl_RootTableList.Tables[i].Pointer,
AcpiGbl_RootTableList.Tables[i].Length))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
AcpiTbDeleteTable (TableDesc);
*TableIndex = i;
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto Release;
}
else
{
/* Table was unloaded, allow it to be reloaded */
TableDesc->Pointer = AcpiGbl_RootTableList.Tables[i].Pointer;
TableDesc->Address = AcpiGbl_RootTableList.Tables[i].Address;
Status = AE_OK;
goto PrintHeader;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
*/
Status = AcpiOsTableOverride (TableDesc->Pointer, &OverrideTable);
if (ACPI_SUCCESS (Status) && OverrideTable)
{
ACPI_INFO ((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
TableDesc->Pointer->Signature,
ACPI_CAST_PTR (void, TableDesc->Address)));
/* We can delete the table that was passed as a parameter */
AcpiTbDeleteTable (TableDesc);
/* Setup descriptor for the new table */
TableDesc->Address = ACPI_PTR_TO_PHYSADDR (OverrideTable);
TableDesc->Pointer = OverrideTable;
TableDesc->Length = OverrideTable->Length;
TableDesc->Flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
