ACPI_STATUS
AcpiExExtractFromField (
ACPI_OPERAND_OBJECT *ObjDesc,
void *Buffer,
UINT32 BufferLength)
{
ACPI_STATUS Status;
UINT64 RawDatum;
UINT64 MergedDatum;
UINT32 FieldOffset = 0;
UINT32 BufferOffset = 0;
UINT32 BufferTailBits;
UINT32 DatumCount;
UINT32 FieldDatumCount;
UINT32 AccessBitWidth;
UINT32 i;
ACPI_FUNCTION_TRACE (ExExtractFromField);
/* Validate target buffer and clear it */
if (BufferLength <
ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength))
{
ACPI_ERROR ((AE_INFO,
"Field size %u (bits) is too large for buffer (%u)",
ObjDesc->CommonField.BitLength, BufferLength));
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
}
memset (Buffer, 0, BufferLength);
AccessBitWidth = ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth);
/* Handle the simple case here */
if ((ObjDesc->CommonField.StartFieldBitOffset == 0) &&
(ObjDesc->CommonField.BitLength == AccessBitWidth))
{
if (BufferLength >= sizeof (UINT64))
{
Status = AcpiExFieldDatumIo (ObjDesc, 0, Buffer, ACPI_READ);
}
else
{
/* Use RawDatum (UINT64) to handle buffers < 64 bits */
Status = AcpiExFieldDatumIo (ObjDesc, 0, &RawDatum, ACPI_READ);
memcpy (Buffer, &RawDatum, BufferLength);
}
return_ACPI_STATUS (Status);
}
/* TBD: Move to common setup code */
/* Field algorithm is limited to sizeof(UINT64), truncate if needed */
if (ObjDesc->CommonField.AccessByteWidth > sizeof (UINT64))
{
ObjDesc->CommonField.AccessByteWidth = sizeof (UINT64);
AccessBitWidth = sizeof (UINT64) * 8;
}
/* Compute the number of datums (access width data items) */
DatumCount = ACPI_ROUND_UP_TO (
ObjDesc->CommonField.BitLength, AccessBitWidth);
FieldDatumCount = ACPI_ROUND_UP_TO (
ObjDesc->CommonField.BitLength +
ObjDesc->CommonField.StartFieldBitOffset, AccessBitWidth);
/* Priming read from the field */
Status = AcpiExFieldDatumIo (ObjDesc, FieldOffset, &RawDatum, ACPI_READ);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
MergedDatum = RawDatum >> ObjDesc->CommonField.StartFieldBitOffset;
/* Read the rest of the field */
for (i = 1; i < FieldDatumCount; i++)
{
/* Get next input datum from the field */
FieldOffset += ObjDesc->CommonField.AccessByteWidth;
Status = AcpiExFieldDatumIo (
ObjDesc, FieldOffset, &RawDatum, ACPI_READ);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Merge with previous datum if necessary.
*
* Note: Before the shift, check if the shift value will be larger than
* the integer size. If so, there is no need to perform the operation.
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
if (AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset <
ACPI_INTEGER_BIT_SIZE)
{
MergedDatum |= RawDatum <<
(AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset);
}
if (i == DatumCount)
{
break;
}
/* Write merged datum to target buffer */
memcpy (((char *) Buffer) + BufferOffset, &MergedDatum,
ACPI_MIN(ObjDesc->CommonField.AccessByteWidth,
BufferLength - BufferOffset));
BufferOffset += ObjDesc->CommonField.AccessByteWidth;
MergedDatum = RawDatum >> ObjDesc->CommonField.StartFieldBitOffset;
}
/* Mask off any extra bits in the last datum */
BufferTailBits = ObjDesc->CommonField.BitLength % AccessBitWidth;
if (BufferTailBits)
{
MergedDatum &= ACPI_MASK_BITS_ABOVE (BufferTailBits);
}
/* Write the last datum to the buffer */
memcpy (((char *) Buffer) + BufferOffset, &MergedDatum,
ACPI_MIN(ObjDesc->CommonField.AccessByteWidth,
BufferLength - BufferOffset));
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiExInsertIntoField (
ACPI_OPERAND_OBJECT *ObjDesc,
void *Buffer,
UINT32 BufferLength)
{
void *NewBuffer;
ACPI_STATUS Status;
UINT64 Mask;
UINT64 WidthMask;
UINT64 MergedDatum;
UINT64 RawDatum = 0;
UINT32 FieldOffset = 0;
UINT32 BufferOffset = 0;
UINT32 BufferTailBits;
UINT32 DatumCount;
UINT32 FieldDatumCount;
UINT32 AccessBitWidth;
UINT32 RequiredLength;
UINT32 i;
ACPI_FUNCTION_TRACE (ExInsertIntoField);
/* Validate input buffer */
NewBuffer = NULL;
RequiredLength = ACPI_ROUND_BITS_UP_TO_BYTES (
ObjDesc->CommonField.BitLength);
/*
* We must have a buffer that is at least as long as the field
* we are writing to. This is because individual fields are
* indivisible and partial writes are not supported -- as per
* the ACPI specification.
*/
if (BufferLength < RequiredLength)
{
/* We need to create a new buffer */
NewBuffer = ACPI_ALLOCATE_ZEROED (RequiredLength);
if (!NewBuffer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Copy the original data to the new buffer, starting
* at Byte zero. All unused (upper) bytes of the
* buffer will be 0.
*/
memcpy ((char *) NewBuffer, (char *) Buffer, BufferLength);
Buffer = NewBuffer;
BufferLength = RequiredLength;
}
/* TBD: Move to common setup code */
/* Algo is limited to sizeof(UINT64), so cut the AccessByteWidth */
if (ObjDesc->CommonField.AccessByteWidth > sizeof (UINT64))
{
ObjDesc->CommonField.AccessByteWidth = sizeof (UINT64);
}
AccessBitWidth = ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth);
/* Create the bitmasks used for bit insertion */
WidthMask = ACPI_MASK_BITS_ABOVE_64 (AccessBitWidth);
Mask = WidthMask &
ACPI_MASK_BITS_BELOW (ObjDesc->CommonField.StartFieldBitOffset);
/* Compute the number of datums (access width data items) */
DatumCount = ACPI_ROUND_UP_TO (ObjDesc->CommonField.BitLength,
AccessBitWidth);
FieldDatumCount = ACPI_ROUND_UP_TO (ObjDesc->CommonField.BitLength +
ObjDesc->CommonField.StartFieldBitOffset,
AccessBitWidth);
/* Get initial Datum from the input buffer */
memcpy (&RawDatum, Buffer,
ACPI_MIN(ObjDesc->CommonField.AccessByteWidth,
BufferLength - BufferOffset));
MergedDatum = RawDatum << ObjDesc->CommonField.StartFieldBitOffset;
/* Write the entire field */
for (i = 1; i < FieldDatumCount; i++)
{
/* Write merged datum to the target field */
MergedDatum &= Mask;
Status = AcpiExWriteWithUpdateRule (
ObjDesc, Mask, MergedDatum, FieldOffset);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
FieldOffset += ObjDesc->CommonField.AccessByteWidth;
/*
* Start new output datum by merging with previous input datum
* if necessary.
*
* Note: Before the shift, check if the shift value will be larger than
* the integer size. If so, there is no need to perform the operation.
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
if ((AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset) <
ACPI_INTEGER_BIT_SIZE)
{
MergedDatum = RawDatum >>
(AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset);
}
else
{
static void acpi_tb_convert_fadt(void)
{
const char *name;
struct acpi_generic_address *address64;
u32 address32;
u8 length;
u8 flags;
u32 i;
/*
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
* should be zero are indeed zero. This will workaround BIOSs that
* inadvertently place values in these fields.
*
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
* at offset 45, 55, 95, and the word located at offset 109, 110.
*
* Note: The FADT revision value is unreliable. Only the length can be
* trusted.
*/
if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
acpi_gbl_FADT.preferred_profile = 0;
acpi_gbl_FADT.pstate_control = 0;
acpi_gbl_FADT.cst_control = 0;
acpi_gbl_FADT.boot_flags = 0;
}
/*
* Now we can update the local FADT length to the length of the
* current FADT version as defined by the ACPI specification.
* Thus, we will have a common FADT internally.
*/
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/*
* Expand the 32-bit DSDT addresses to 64-bit as necessary.
* Later ACPICA code will always use the X 64-bit field.
*/
acpi_gbl_FADT.Xdsdt = acpi_tb_select_address("DSDT",
acpi_gbl_FADT.dsdt,
acpi_gbl_FADT.Xdsdt);
/* If Hardware Reduced flag is set, we are all done */
if (acpi_gbl_reduced_hardware) {
return;
}
/* Examine all of the 64-bit extended address fields (X fields) */
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
/*
* Get the 32-bit and 64-bit addresses, as well as the register
* length and register name.
*/
address32 = *ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_info_table[i].address32);
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
length = *ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table[i].length);
name = fadt_info_table[i].name;
flags = fadt_info_table[i].flags;
/*
* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
* generic address structures as necessary. Later code will always use
* the 64-bit address structures.
*
* November 2013:
* Now always use the 64-bit address if it is valid (non-zero), in
* accordance with the ACPI specification which states that a 64-bit
* address supersedes the 32-bit version. This behavior can be
* overridden by the acpi_gbl_use32_bit_fadt_addresses flag.
*
* During 64-bit address construction and verification,
* these cases are handled:
*
* Address32 zero, Address64 [don't care] - Use Address64
*
* No override: if acpi_gbl_use32_bit_fadt_addresses is FALSE, and:
* Address32 non-zero, Address64 zero - Copy/use Address32
* Address32 non-zero == Address64 non-zero - Use Address64
* Address32 non-zero != Address64 non-zero - Warning, use Address64
*
* Override: if acpi_gbl_use32_bit_fadt_addresses is TRUE, and:
* Address32 non-zero, Address64 zero - Copy/use Address32
* Address32 non-zero == Address64 non-zero - Copy/use Address32
* Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
*
* Note: space_id is always I/O for 32-bit legacy address fields
*/
if (address32) {
if (address64->address) {
if (address64->address != (u64)address32) {
/* Address mismatch */
ACPI_BIOS_WARNING((AE_INFO,
"32/64X address mismatch in FADT/%s: "
"0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
name, address32,
ACPI_FORMAT_UINT64
(address64->address),
acpi_gbl_use32_bit_fadt_addresses
? 32 : 64));
}
/*
* For each extended field, check for length mismatch
* between the legacy length field and the corresponding
* 64-bit X length field.
* Note: If the legacy length field is > 0xFF bits, ignore
* this check. (GPE registers can be larger than the
* 64-bit GAS structure can accomodate, 0xFF bits).
*/
if ((ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
(address64->bit_width !=
ACPI_MUL_8(length))) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",
name,
ACPI_MUL_8(length),
address64->
bit_width));
}
}
/*
* Hardware register access code always uses the 64-bit fields.
* So if the 64-bit field is zero or is to be overridden,
* initialize it with the 32-bit fields.
* Note that when the 32-bit address favor is specified, the
* 64-bit fields are always re-initialized so that
* access_size/bit_width/bit_offset fields can be correctly
* configured to the values to trigger a 32-bit compatible
* access mode in the hardware register access code.
*/
if (!address64->address
|| acpi_gbl_use32_bit_fadt_addresses) {
acpi_tb_init_generic_address(address64,
ACPI_ADR_SPACE_SYSTEM_IO,
length,
(u64)address32,
name, flags);
}
}
if (fadt_info_table[i].flags & ACPI_FADT_REQUIRED) {
/*
* Field is required (Pm1a_event, Pm1a_control).
* Both the address and length must be non-zero.
*/
if (!address64->address || !length) {
ACPI_BIOS_ERROR((AE_INFO,
"Required FADT field %s has zero address and/or length: "
"0x%8.8X%8.8X/0x%X",
name,
ACPI_FORMAT_UINT64(address64->
address),
length));
}
} else if (fadt_info_table[i].flags & ACPI_FADT_SEPARATE_LENGTH) {
/*
* Field is optional (Pm2_control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must
* be valid.
*/
if ((address64->address && !length) ||
(!address64->address && length)) {
ACPI_BIOS_WARNING((AE_INFO,
"Optional FADT field %s has valid %s but zero %s: "
"0x%8.8X%8.8X/0x%X", name,
(length ? "Length" :
"Address"),
(length ? "Address" :
"Length"),
ACPI_FORMAT_UINT64
(address64->address),
length));
}
}
}
}
ACPI_STATUS
AcpiExWriteWithUpdateRule (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT64 Mask,
UINT64 FieldValue,
UINT32 FieldDatumByteOffset)
{
ACPI_STATUS Status = AE_OK;
UINT64 MergedValue;
UINT64 CurrentValue;
ACPI_FUNCTION_TRACE_U32 (ExWriteWithUpdateRule, Mask);
/* Start with the new bits */
MergedValue = FieldValue;
/* If the mask is all ones, we don't need to worry about the update rule */
if (Mask != ACPI_UINT64_MAX)
{
/* Decode the update rule */
switch (ObjDesc->CommonField.FieldFlags & AML_FIELD_UPDATE_RULE_MASK)
{
case AML_FIELD_UPDATE_PRESERVE:
/*
* Check if update rule needs to be applied (not if mask is all
* ones) The left shift drops the bits we want to ignore.
*/
if ((~Mask << (ACPI_MUL_8 (sizeof (Mask)) -
ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth))) != 0)
{
/*
* Read the current contents of the byte/word/dword containing
* the field, and merge with the new field value.
*/
Status = AcpiExFieldDatumIo (
ObjDesc, FieldDatumByteOffset, &CurrentValue, ACPI_READ);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
MergedValue |= (CurrentValue & ~Mask);
}
break;
case AML_FIELD_UPDATE_WRITE_AS_ONES:
/* Set positions outside the field to all ones */
MergedValue |= ~Mask;
break;
case AML_FIELD_UPDATE_WRITE_AS_ZEROS:
/* Set positions outside the field to all zeros */
MergedValue &= Mask;
break;
default:
ACPI_ERROR ((AE_INFO,
"Unknown UpdateRule value: 0x%X",
(ObjDesc->CommonField.FieldFlags &
AML_FIELD_UPDATE_RULE_MASK)));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
"Mask %8.8X%8.8X, DatumOffset %X, Width %X, "
"Value %8.8X%8.8X, MergedValue %8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (Mask),
FieldDatumByteOffset,
ObjDesc->CommonField.AccessByteWidth,
ACPI_FORMAT_UINT64 (FieldValue),
ACPI_FORMAT_UINT64 (MergedValue)));
/* Write the merged value */
Status = AcpiExFieldDatumIo (
ObjDesc, FieldDatumByteOffset, &MergedValue, ACPI_WRITE);
return_ACPI_STATUS (Status);
}
static char *
AcpiGetTagPathname (
ACPI_PARSE_OBJECT *IndexOp,
ACPI_NAMESPACE_NODE *BufferNode,
ACPI_NAMESPACE_NODE *ResourceNode,
UINT32 BitIndex)
{
ACPI_STATUS Status;
UINT32 ResourceBitIndex;
UINT8 ResourceTableIndex;
ACPI_SIZE RequiredSize;
char *Pathname;
AML_RESOURCE *Aml;
ACPI_PARSE_OBJECT *Op;
char *InternalPath;
char *Tag;
/* Get the Op that contains the actual buffer data */
Op = BufferNode->Op->Common.Value.Arg;
Op = Op->Common.Next;
if (!Op)
{
return (NULL);
}
/* Get the individual resource descriptor and validate it */
Aml = ACPI_CAST_PTR (AML_RESOURCE,
&Op->Named.Data[ResourceNode->Value]);
Status = AcpiUtValidateResource (NULL, Aml, &ResourceTableIndex);
if (ACPI_FAILURE (Status))
{
return (NULL);
}
/* Get offset into this descriptor (from offset into entire buffer) */
ResourceBitIndex = BitIndex - ACPI_MUL_8 (ResourceNode->Value);
/* Get the tag associated with this resource descriptor and offset */
Tag = AcpiDmGetResourceTag (ResourceBitIndex, Aml, ResourceTableIndex);
if (!Tag)
{
return (NULL);
}
/*
* Now that we know that we have a reference that can be converted to a
* symbol, change the name of the resource to a unique name.
*/
AcpiDmUpdateResourceName (ResourceNode);
/* Get the full pathname to the parent buffer */
RequiredSize = AcpiNsGetPathnameLength (BufferNode);
if (!RequiredSize)
{
return (NULL);
}
Pathname = ACPI_ALLOCATE_ZEROED (RequiredSize + ACPI_PATH_SEGMENT_LENGTH);
if (!Pathname)
{
return (NULL);
}
Status = AcpiNsBuildExternalPath (BufferNode, RequiredSize, Pathname);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (Pathname);
return (NULL);
}
/*
* Create the full path to the resource and tag by: remove the buffer name,
* append the resource descriptor name, append a dot, append the tag name.
*
* TBD: Always using the full path is a bit brute force, the path can be
* often be optimized with carats (if the original buffer namepath is a
* single nameseg). This doesn't really matter, because these paths do not
* end up in the final compiled AML, it's just an appearance issue for the
* disassembled code.
*/
Pathname[strlen (Pathname) - ACPI_NAME_SIZE] = 0;
strncat (Pathname, ResourceNode->Name.Ascii, ACPI_NAME_SIZE);
strcat (Pathname, ".");
strncat (Pathname, Tag, ACPI_NAME_SIZE);
/* Internalize the namepath to AML format */
AcpiNsInternalizeName (Pathname, &InternalPath);
ACPI_FREE (Pathname);
/* Update the Op with the symbol */
AcpiPsInitOp (IndexOp, AML_INT_NAMEPATH_OP);
IndexOp->Common.Value.String = InternalPath;
/* We will need the tag later. Cheat by putting it in the Node field */
IndexOp->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Tag);
return (InternalPath);
}
acpi_status
acpi_ex_prep_field_value (
struct acpi_create_field_info *info)
{
union acpi_operand_object *obj_desc;
u32 type;
acpi_status status;
ACPI_FUNCTION_TRACE ("ex_prep_field_value");
/* Parameter validation */
if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) {
if (!info->region_node) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null region_node\n"));
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
type = acpi_ns_get_type (info->region_node);
if (type != ACPI_TYPE_REGION) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed Region, found type %X %s\n",
type, acpi_ut_get_type_name (type)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
}
/* Allocate a new field object */
obj_desc = acpi_ut_create_internal_object (info->field_type);
if (!obj_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize areas of the object that are common to all fields */
obj_desc->common_field.node = info->field_node;
status = acpi_ex_prep_common_field_object (obj_desc, info->field_flags,
info->attribute, info->field_bit_position, info->field_bit_length);
if (ACPI_FAILURE (status)) {
acpi_ut_delete_object_desc (obj_desc);
return_ACPI_STATUS (status);
}
/* Initialize areas of the object that are specific to the field type */
switch (info->field_type) {
case ACPI_TYPE_LOCAL_REGION_FIELD:
obj_desc->field.region_obj = acpi_ns_get_attached_object (info->region_node);
/* An additional reference for the container */
acpi_ut_add_reference (obj_desc->field.region_obj);
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
"region_field: Bitoff=%X Off=%X Gran=%X Region %p\n",
obj_desc->field.start_field_bit_offset, obj_desc->field.base_byte_offset,
obj_desc->field.access_byte_width, obj_desc->field.region_obj));
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
obj_desc->bank_field.value = info->bank_value;
obj_desc->bank_field.region_obj = acpi_ns_get_attached_object (info->region_node);
obj_desc->bank_field.bank_obj = acpi_ns_get_attached_object (info->register_node);
/* An additional reference for the attached objects */
acpi_ut_add_reference (obj_desc->bank_field.region_obj);
acpi_ut_add_reference (obj_desc->bank_field.bank_obj);
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
"Bank Field: bit_off=%X Off=%X Gran=%X Region %p bank_reg %p\n",
obj_desc->bank_field.start_field_bit_offset,
obj_desc->bank_field.base_byte_offset,
obj_desc->field.access_byte_width,
obj_desc->bank_field.region_obj,
obj_desc->bank_field.bank_obj));
break;
case ACPI_TYPE_LOCAL_INDEX_FIELD:
obj_desc->index_field.index_obj = acpi_ns_get_attached_object (info->register_node);
obj_desc->index_field.data_obj = acpi_ns_get_attached_object (info->data_register_node);
obj_desc->index_field.value = (u32)
(info->field_bit_position / ACPI_MUL_8 (obj_desc->field.access_byte_width));
if (!obj_desc->index_field.data_obj || !obj_desc->index_field.index_obj) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Index Object\n"));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
/* An additional reference for the attached objects */
acpi_ut_add_reference (obj_desc->index_field.data_obj);
acpi_ut_add_reference (obj_desc->index_field.index_obj);
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
"index_field: bitoff=%X off=%X gran=%X Index %p Data %p\n",
obj_desc->index_field.start_field_bit_offset,
obj_desc->index_field.base_byte_offset,
obj_desc->field.access_byte_width,
obj_desc->index_field.index_obj,
obj_desc->index_field.data_obj));
break;
default:
/* No other types should get here */
break;
}
/*
* Store the constructed descriptor (obj_desc) into the parent Node,
* preserving the current type of that named_obj.
*/
status = acpi_ns_attach_object (info->field_node, obj_desc,
acpi_ns_get_type (info->field_node));
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "set named_obj %p (%4.4s) val = %p\n",
info->field_node, info->field_node->name.ascii, obj_desc));
/* Remove local reference to the object */
acpi_ut_remove_reference (obj_desc);
return_ACPI_STATUS (status);
}
acpi_status
acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
void *buffer, u32 buffer_length)
{
void *new_buffer;
acpi_status status;
u64 mask;
u64 width_mask;
u64 merged_datum;
u64 raw_datum = 0;
u32 field_offset = 0;
u32 buffer_offset = 0;
u32 buffer_tail_bits;
u32 datum_count;
u32 field_datum_count;
u32 access_bit_width;
u32 required_length;
u32 i;
ACPI_FUNCTION_TRACE(ex_insert_into_field);
/* Validate input buffer */
new_buffer = NULL;
required_length =
ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length);
/*
* We must have a buffer that is at least as long as the field
* we are writing to. This is because individual fields are
* indivisible and partial writes are not supported -- as per
* the ACPI specification.
*/
if (buffer_length < required_length) {
/* We need to create a new buffer */
new_buffer = ACPI_ALLOCATE_ZEROED(required_length);
if (!new_buffer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/*
* Copy the original data to the new buffer, starting
* at Byte zero. All unused (upper) bytes of the
* buffer will be 0.
*/
ACPI_MEMCPY((char *)new_buffer, (char *)buffer, buffer_length);
buffer = new_buffer;
buffer_length = required_length;
}
/* TBD: Move to common setup code */
/* Algo is limited to sizeof(u64), so cut the access_byte_width */
if (obj_desc->common_field.access_byte_width > sizeof(u64)) {
obj_desc->common_field.access_byte_width = sizeof(u64);
}
access_bit_width = ACPI_MUL_8(obj_desc->common_field.access_byte_width);
/*
* Create the bitmasks used for bit insertion.
* Note: This if/else is used to bypass compiler differences with the
* shift operator
*/
if (access_bit_width == ACPI_INTEGER_BIT_SIZE) {
width_mask = ACPI_UINT64_MAX;
} else {
width_mask = ACPI_MASK_BITS_ABOVE(access_bit_width);
}
mask = width_mask &
ACPI_MASK_BITS_BELOW(obj_desc->common_field.start_field_bit_offset);
/* Compute the number of datums (access width data items) */
datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length,
access_bit_width);
field_datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length +
obj_desc->common_field.
start_field_bit_offset,
access_bit_width);
/* Get initial Datum from the input buffer */
ACPI_MEMCPY(&raw_datum, buffer,
ACPI_MIN(obj_desc->common_field.access_byte_width,
buffer_length - buffer_offset));
merged_datum =
raw_datum << obj_desc->common_field.start_field_bit_offset;
/* Write the entire field */
for (i = 1; i < field_datum_count; i++) {
/* Write merged datum to the target field */
merged_datum &= mask;
status = acpi_ex_write_with_update_rule(obj_desc, mask,
merged_datum,
field_offset);
if (ACPI_FAILURE(status)) {
goto exit;
}
field_offset += obj_desc->common_field.access_byte_width;
/*
* Start new output datum by merging with previous input datum
* if necessary.
*
* Note: Before the shift, check if the shift value will be larger than
* the integer size. If so, there is no need to perform the operation.
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
if ((access_bit_width -
obj_desc->common_field.start_field_bit_offset) <
ACPI_INTEGER_BIT_SIZE) {
merged_datum =
raw_datum >> (access_bit_width -
obj_desc->common_field.
start_field_bit_offset);
} else {
acpi_status
acpi_ex_write_with_update_rule (
union acpi_operand_object *obj_desc,
acpi_integer mask,
acpi_integer field_value,
u32 field_datum_byte_offset)
{
acpi_status status = AE_OK;
acpi_integer merged_value;
acpi_integer current_value;
ACPI_FUNCTION_TRACE_U32 ("ex_write_with_update_rule", mask);
/* Start with the new bits */
merged_value = field_value;
/* If the mask is all ones, we don't need to worry about the update rule */
if (mask != ACPI_INTEGER_MAX) {
/* Decode the update rule */
switch (obj_desc->common_field.field_flags & AML_FIELD_UPDATE_RULE_MASK) {
case AML_FIELD_UPDATE_PRESERVE:
/*
* Check if update rule needs to be applied (not if mask is all
* ones) The left shift drops the bits we want to ignore.
*/
if ((~mask << (ACPI_MUL_8 (sizeof (mask)) -
ACPI_MUL_8 (obj_desc->common_field.access_byte_width))) != 0) {
/*
* Read the current contents of the byte/word/dword containing
* the field, and merge with the new field value.
*/
status = acpi_ex_field_datum_io (obj_desc, field_datum_byte_offset,
¤t_value, ACPI_READ);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
merged_value |= (current_value & ~mask);
}
break;
case AML_FIELD_UPDATE_WRITE_AS_ONES:
/* Set positions outside the field to all ones */
merged_value |= ~mask;
break;
case AML_FIELD_UPDATE_WRITE_AS_ZEROS:
/* Set positions outside the field to all zeros */
merged_value &= mask;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"write_with_update_rule: Unknown update_rule setting: %X\n",
(obj_desc->common_field.field_flags & AML_FIELD_UPDATE_RULE_MASK)));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
"Mask %8.8X%8.8X, datum_offset %X, Width %X, Value %8.8X%8.8X, merged_value %8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (mask),
field_datum_byte_offset,
obj_desc->common_field.access_byte_width,
ACPI_FORMAT_UINT64 (field_value),
ACPI_FORMAT_UINT64 (merged_value)));
/* Write the merged value */
status = acpi_ex_field_datum_io (obj_desc, field_datum_byte_offset,
&merged_value, ACPI_WRITE);
return_ACPI_STATUS (status);
}
static void
AcpiTbValidateFadt (
void)
{
char *Name;
ACPI_GENERIC_ADDRESS *Address64;
UINT8 Length;
UINT32 i;
/*
* Check for FACS and DSDT address mismatches. An address mismatch between
* the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
* DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables.
*/
if (AcpiGbl_FADT.Facs &&
(AcpiGbl_FADT.XFacs != (UINT64) AcpiGbl_FADT.Facs))
{
ACPI_BIOS_WARNING ((AE_INFO,
"32/64X FACS address mismatch in FADT - "
"0x%8.8X/0x%8.8X%8.8X, using 32",
AcpiGbl_FADT.Facs, ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XFacs)));
AcpiGbl_FADT.XFacs = (UINT64) AcpiGbl_FADT.Facs;
}
if (AcpiGbl_FADT.Dsdt &&
(AcpiGbl_FADT.XDsdt != (UINT64) AcpiGbl_FADT.Dsdt))
{
ACPI_BIOS_WARNING ((AE_INFO,
"32/64X DSDT address mismatch in FADT - "
"0x%8.8X/0x%8.8X%8.8X, using 32",
AcpiGbl_FADT.Dsdt, ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XDsdt)));
AcpiGbl_FADT.XDsdt = (UINT64) AcpiGbl_FADT.Dsdt;
}
/* If Hardware Reduced flag is set, we are all done */
if (AcpiGbl_ReducedHardware)
{
return;
}
/* Examine all of the 64-bit extended address fields (X fields) */
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
{
/*
* Generate pointer to the 64-bit address, get the register
* length (width) and the register name
*/
Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS,
&AcpiGbl_FADT, FadtInfoTable[i].Address64);
Length = *ACPI_ADD_PTR (UINT8,
&AcpiGbl_FADT, FadtInfoTable[i].Length);
Name = FadtInfoTable[i].Name;
/*
* For each extended field, check for length mismatch between the
* legacy length field and the corresponding 64-bit X length field.
*/
if (Address64->Address &&
(Address64->BitWidth != ACPI_MUL_8 (Length)))
{
ACPI_BIOS_WARNING ((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",
Name, ACPI_MUL_8 (Length), Address64->BitWidth));
}
if (FadtInfoTable[i].Type & ACPI_FADT_REQUIRED)
{
/*
* Field is required (PM1aEvent, PM1aControl, PmTimer).
* Both the address and length must be non-zero.
*/
if (!Address64->Address || !Length)
{
ACPI_BIOS_ERROR ((AE_INFO,
"Required FADT field %s has zero address and/or length: "
"0x%8.8X%8.8X/0x%X",
Name, ACPI_FORMAT_UINT64 (Address64->Address), Length));
}
}
else if (FadtInfoTable[i].Type & ACPI_FADT_SEPARATE_LENGTH)
{
/*
* Field is optional (PM2Control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must
* be valid.
*/
if ((Address64->Address && !Length) ||
(!Address64->Address && Length))
{
ACPI_BIOS_WARNING ((AE_INFO,
"Optional FADT field %s has zero address or length: "
"0x%8.8X%8.8X/0x%X",
Name, ACPI_FORMAT_UINT64 (Address64->Address), Length));
}
}
}
}
acpi_status
acpi_ex_extract_from_field(union acpi_operand_object *obj_desc,
void *buffer, u32 buffer_length)
{
acpi_status status;
u64 raw_datum;
u64 merged_datum;
u32 field_offset = 0;
u32 buffer_offset = 0;
u32 buffer_tail_bits;
u32 datum_count;
u32 field_datum_count;
u32 access_bit_width;
u32 i;
ACPI_FUNCTION_TRACE(ex_extract_from_field);
/* Validate target buffer and clear it */
if (buffer_length <
ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length)) {
ACPI_ERROR((AE_INFO,
"Field size %u (bits) is too large for buffer (%u)",
obj_desc->common_field.bit_length, buffer_length));
return_ACPI_STATUS(AE_BUFFER_OVERFLOW);
}
ACPI_MEMSET(buffer, 0, buffer_length);
access_bit_width = ACPI_MUL_8(obj_desc->common_field.access_byte_width);
/* Handle the simple case here */
if ((obj_desc->common_field.start_field_bit_offset == 0) &&
(obj_desc->common_field.bit_length == access_bit_width)) {
if (buffer_length >= sizeof(u64)) {
status =
acpi_ex_field_datum_io(obj_desc, 0, buffer,
ACPI_READ);
} else {
/* Use raw_datum (u64) to handle buffers < 64 bits */
status =
acpi_ex_field_datum_io(obj_desc, 0, &raw_datum,
ACPI_READ);
ACPI_MEMCPY(buffer, &raw_datum, buffer_length);
}
return_ACPI_STATUS(status);
}
/* TBD: Move to common setup code */
/* Field algorithm is limited to sizeof(u64), truncate if needed */
if (obj_desc->common_field.access_byte_width > sizeof(u64)) {
obj_desc->common_field.access_byte_width = sizeof(u64);
access_bit_width = sizeof(u64) * 8;
}
/* Compute the number of datums (access width data items) */
datum_count =
ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length,
access_bit_width);
field_datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length +
obj_desc->common_field.
start_field_bit_offset,
access_bit_width);
/* Priming read from the field */
status =
acpi_ex_field_datum_io(obj_desc, field_offset, &raw_datum,
ACPI_READ);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
merged_datum =
raw_datum >> obj_desc->common_field.start_field_bit_offset;
/* Read the rest of the field */
for (i = 1; i < field_datum_count; i++) {
/* Get next input datum from the field */
field_offset += obj_desc->common_field.access_byte_width;
status = acpi_ex_field_datum_io(obj_desc, field_offset,
&raw_datum, ACPI_READ);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Merge with previous datum if necessary.
*
* Note: Before the shift, check if the shift value will be larger than
* the integer size. If so, there is no need to perform the operation.
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
if (access_bit_width -
obj_desc->common_field.start_field_bit_offset <
ACPI_INTEGER_BIT_SIZE) {
merged_datum |=
raw_datum << (access_bit_width -
obj_desc->common_field.
start_field_bit_offset);
}
if (i == datum_count) {
break;
}
/* Write merged datum to target buffer */
ACPI_MEMCPY(((char *)buffer) + buffer_offset, &merged_datum,
ACPI_MIN(obj_desc->common_field.access_byte_width,
buffer_length - buffer_offset));
buffer_offset += obj_desc->common_field.access_byte_width;
merged_datum =
raw_datum >> obj_desc->common_field.start_field_bit_offset;
}
/* Mask off any extra bits in the last datum */
buffer_tail_bits = obj_desc->common_field.bit_length % access_bit_width;
if (buffer_tail_bits) {
merged_datum &= ACPI_MASK_BITS_ABOVE(buffer_tail_bits);
}
/* Write the last datum to the buffer */
ACPI_MEMCPY(((char *)buffer) + buffer_offset, &merged_datum,
ACPI_MIN(obj_desc->common_field.access_byte_width,
buffer_length - buffer_offset));
return_ACPI_STATUS(AE_OK);
}
static ACPI_STATUS
XfNamespaceLocateBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
char *Path;
UINT8 PassedArgs;
ACPI_PARSE_OBJECT *NextOp;
ACPI_PARSE_OBJECT *OwningOp;
ACPI_PARSE_OBJECT *SpaceIdOp;
UINT32 MinimumLength;
UINT32 Offset;
UINT32 FieldBitLength;
UINT32 TagBitLength;
UINT8 Message = 0;
const ACPI_OPCODE_INFO *OpInfo;
UINT32 Flags;
ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op);
/*
* If this node is the actual declaration of a name
* [such as the XXXX name in "Method (XXXX)"],
* we are not interested in it here. We only care about names that are
* references to other objects within the namespace and the parent objects
* of name declarations
*/
if (Op->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)
{
return_ACPI_STATUS (AE_OK);
}
/* We are only interested in opcodes that have an associated name */
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
if ((!(OpInfo->Flags & AML_NAMED)) &&
(!(OpInfo->Flags & AML_CREATE)) &&
(Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) &&
(Op->Asl.ParseOpcode != PARSEOP_NAMESEG) &&
(Op->Asl.ParseOpcode != PARSEOP_METHODCALL))
{
return_ACPI_STATUS (AE_OK);
}
/*
* One special case: CondRefOf operator - we don't care if the name exists
* or not at this point, just ignore it, the point of the operator is to
* determine if the name exists at runtime.
*/
if ((Op->Asl.Parent) &&
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF))
{
return_ACPI_STATUS (AE_OK);
}
/*
* We must enable the "search-to-root" for single NameSegs, but
* we have to be very careful about opening up scopes
*/
Flags = ACPI_NS_SEARCH_PARENT;
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
/*
* These are name references, do not push the scope stack
* for them.
*/
Flags |= ACPI_NS_DONT_OPEN_SCOPE;
}
/* Get the NamePath from the appropriate place */
if (OpInfo->Flags & AML_NAMED)
{
/* For nearly all NAMED operators, the name reference is the first child */
Path = Op->Asl.Child->Asl.Value.String;
if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
{
/*
* ALIAS is the only oddball opcode, the name declaration
* (alias name) is the second operand
*/
Path = Op->Asl.Child->Asl.Next->Asl.Value.String;
}
}
else if (OpInfo->Flags & AML_CREATE)
{
/* Name must appear as the last parameter */
NextOp = Op->Asl.Child;
while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION))
{
NextOp = NextOp->Asl.Next;
}
Path = NextOp->Asl.Value.String;
}
else
{
Path = Op->Asl.Value.String;
}
ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Type=%s\n", AcpiUtGetTypeName (ObjectType)));
/*
* Lookup the name in the namespace. Name must exist at this point, or it
* is an invalid reference.
*
* The namespace is also used as a lookup table for references to resource
* descriptors and the fields within them.
*/
Gbl_NsLookupCount++;
Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/*
* We didn't find the name reference by path -- we can qualify this
* a little better before we print an error message
*/
if (strlen (Path) == ACPI_NAME_SIZE)
{
/* A simple, one-segment ACPI name */
if (XfObjectExists (Path))
{
/*
* There exists such a name, but we couldn't get to it
* from this scope
*/
AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op,
Op->Asl.ExternalName);
}
else
{
/* The name doesn't exist, period */
AslError (ASL_ERROR, ASL_MSG_NOT_EXIST,
Op, Op->Asl.ExternalName);
}
}
else
{
/* Check for a fully qualified path */
if (Path[0] == AML_ROOT_PREFIX)
{
/* Gave full path, the object does not exist */
AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op,
Op->Asl.ExternalName);
}
else
{
/*
* We can't tell whether it doesn't exist or just
* can't be reached.
*/
AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
Op->Asl.ExternalName);
}
}
Status = AE_OK;
}
return_ACPI_STATUS (Status);
}
/* Check for a reference vs. name declaration */
if (!(OpInfo->Flags & AML_NAMED) &&
!(OpInfo->Flags & AML_CREATE))
{
/* This node has been referenced, mark it for reference check */
Node->Flags |= ANOBJ_IS_REFERENCED;
#ifdef __UNDER_DEVELOPMENT
/* Check for an illegal reference */
XfCheckIllegalReference (Op, Node);
#endif
}
/* Attempt to optimize the NamePath */
OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node);
/*
* 1) Dereference an alias (A name reference that is an alias)
* Aliases are not nested, the alias always points to the final object
*/
if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) &&
(Node->Type == ACPI_TYPE_LOCAL_ALIAS))
{
/* This node points back to the original PARSEOP_ALIAS */
NextOp = Node->Op;
/* The first child is the alias target op */
NextOp = NextOp->Asl.Child;
/* That in turn points back to original target alias node */
if (NextOp->Asl.Node)
{
Node = NextOp->Asl.Node;
}
/* Else - forward reference to alias, will be resolved later */
}
/* 2) Check for a reference to a resource descriptor */
if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
(Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
{
/*
* This was a reference to a field within a resource descriptor.
* Extract the associated field offset (either a bit or byte
* offset depending on the field type) and change the named
* reference into an integer for AML code generation
*/
Offset = Node->Value;
TagBitLength = Node->Length;
/*
* If a field is being created, generate the length (in bits) of
* the field. Note: Opcodes other than CreateXxxField and Index
* can come through here. For other opcodes, we just need to
* convert the resource tag reference to an integer offset.
*/
switch (Op->Asl.Parent->Asl.AmlOpcode)
{
case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */
/*
* We know the length operand is an integer constant because
* we know that it contains a reference to a resource
* descriptor tag.
*/
FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer;
break;
case AML_CREATE_BIT_FIELD_OP:
FieldBitLength = 1;
break;
case AML_CREATE_BYTE_FIELD_OP:
case AML_INDEX_OP:
FieldBitLength = 8;
break;
case AML_CREATE_WORD_FIELD_OP:
FieldBitLength = 16;
break;
case AML_CREATE_DWORD_FIELD_OP:
FieldBitLength = 32;
break;
case AML_CREATE_QWORD_FIELD_OP:
FieldBitLength = 64;
break;
default:
FieldBitLength = 0;
break;
}
/* Check the field length against the length of the resource tag */
if (FieldBitLength)
{
if (TagBitLength < FieldBitLength)
{
Message = ASL_MSG_TAG_SMALLER;
}
else if (TagBitLength > FieldBitLength)
{
Message = ASL_MSG_TAG_LARGER;
}
if (Message)
{
snprintf (MsgBuffer, sizeof(MsgBuffer), "Size mismatch, Tag: %u bit%s, Field: %u bit%s",
TagBitLength, (TagBitLength > 1) ? "s" : "",
FieldBitLength, (FieldBitLength > 1) ? "s" : "");
AslError (ASL_WARNING, Message, Op, MsgBuffer);
}
}
/* Convert the BitOffset to a ByteOffset for certain opcodes */
switch (Op->Asl.Parent->Asl.AmlOpcode)
{
case AML_CREATE_BYTE_FIELD_OP:
case AML_CREATE_WORD_FIELD_OP:
case AML_CREATE_DWORD_FIELD_OP:
case AML_CREATE_QWORD_FIELD_OP:
case AML_INDEX_OP:
Offset = ACPI_DIV_8 (Offset);
break;
default:
break;
}
/* Now convert this node to an integer whose value is the field offset */
Op->Asl.AmlLength = 0;
Op->Asl.ParseOpcode = PARSEOP_INTEGER;
Op->Asl.Value.Integer = (UINT64) Offset;
Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD;
OpcGenerateAmlOpcode (Op);
}
/* 3) Check for a method invocation */
else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) &&
(Node->Type == ACPI_TYPE_METHOD) &&
(Op->Asl.Parent) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
/*
* A reference to a method within one of these opcodes is not an
* invocation of the method, it is simply a reference to the method.
*/
if ((Op->Asl.Parent) &&
((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEREFOF) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE)))
{
return_ACPI_STATUS (AE_OK);
}
/*
* There are two types of method invocation:
* 1) Invocation with arguments -- the parser recognizes this
* as a METHODCALL.
* 2) Invocation with no arguments --the parser cannot determine that
* this is a method invocation, therefore we have to figure it out
* here.
*/
if (Node->Type != ACPI_TYPE_METHOD)
{
snprintf (MsgBuffer, sizeof(MsgBuffer), "%s is a %s",
Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer);
return_ACPI_STATUS (AE_OK);
}
/* Save the method node in the caller's op */
Op->Asl.Node = Node;
if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)
{
return_ACPI_STATUS (AE_OK);
}
/*
* This is a method invocation, with or without arguments.
* Count the number of arguments, each appears as a child
* under the parent node
*/
Op->Asl.ParseOpcode = PARSEOP_METHODCALL;
UtSetParseOpName (Op);
PassedArgs = 0;
NextOp = Op->Asl.Child;
while (NextOp)
{
PassedArgs++;
NextOp = NextOp->Asl.Next;
}
if (Node->Value != ASL_EXTERNAL_METHOD)
{
/*
* Check the parsed arguments with the number expected by the
* method declaration itself
*/
if (PassedArgs != Node->Value)
{
snprintf (MsgBuffer, sizeof(MsgBuffer), "%s requires %u", Op->Asl.ExternalName,
Node->Value);
if (PassedArgs < Node->Value)
{
AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer);
}
else
{
AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer);
}
}
}
}
/* 4) Check for an ASL Field definition */
else if ((Op->Asl.Parent) &&
((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) ||
(Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD)))
{
/*
* Offset checking for fields. If the parent operation region has a
* constant length (known at compile time), we can check fields
* defined in that region against the region length. This will catch
* fields and field units that cannot possibly fit within the region.
*
* Note: Index fields do not directly reference an operation region,
* thus they are not included in this check.
*/
if (Op == Op->Asl.Parent->Asl.Child)
{
/*
* This is the first child of the field node, which is
* the name of the region. Get the parse node for the
* region -- which contains the length of the region.
*/
OwningOp = Node->Op;
Op->Asl.Parent->Asl.ExtraValue =
ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer);
/* Examine the field access width */
switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer)
{
case AML_FIELD_ACCESS_ANY:
case AML_FIELD_ACCESS_BYTE:
case AML_FIELD_ACCESS_BUFFER:
default:
MinimumLength = 1;
break;
case AML_FIELD_ACCESS_WORD:
MinimumLength = 2;
break;
case AML_FIELD_ACCESS_DWORD:
MinimumLength = 4;
break;
case AML_FIELD_ACCESS_QWORD:
MinimumLength = 8;
break;
}
/*
* Is the region at least as big as the access width?
* Note: DataTableRegions have 0 length
*/
if (((UINT32) OwningOp->Asl.Value.Integer) &&
((UINT32) OwningOp->Asl.Value.Integer < MinimumLength))
{
AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL);
}
/*
* Check EC/CMOS/SMBUS fields to make sure that the correct
* access type is used (BYTE for EC/CMOS, BUFFER for SMBUS)
*/
SpaceIdOp = OwningOp->Asl.Child->Asl.Next;
switch ((UINT32) SpaceIdOp->Asl.Value.Integer)
{
case ACPI_ADR_SPACE_EC:
case ACPI_ADR_SPACE_CMOS:
case ACPI_ADR_SPACE_GPIO:
if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BYTE)
{
AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL);
}
break;
case ACPI_ADR_SPACE_SMBUS:
case ACPI_ADR_SPACE_IPMI:
case ACPI_ADR_SPACE_GSBUS:
if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BUFFER)
{
AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL);
}
break;
default:
/* Nothing to do for other address spaces */
break;
}
}
else
{
/*
* This is one element of the field list. Check to make sure
* that it does not go beyond the end of the parent operation region.
*
* In the code below:
* Op->Asl.Parent->Asl.ExtraValue - Region Length (bits)
* Op->Asl.ExtraValue - Field start offset (bits)
* Op->Asl.Child->Asl.Value.Integer32 - Field length (bits)
* Op->Asl.Child->Asl.ExtraValue - Field access width (bits)
*/
if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child)
{
XfCheckFieldRange (Op,
Op->Asl.Parent->Asl.ExtraValue,
Op->Asl.ExtraValue,
(UINT32) Op->Asl.Child->Asl.Value.Integer,
Op->Asl.Child->Asl.ExtraValue);
}
}
}
/* 5) Check for a connection object */
#if 0
else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION)
{
return_ACPI_STATUS (Status);
}
#endif
Op->Asl.Node = Node;
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiExPrepCommonFieldObject (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT8 FieldFlags,
UINT8 FieldAttribute,
UINT32 FieldBitPosition,
UINT32 FieldBitLength)
{
UINT32 AccessBitWidth;
UINT32 ByteAlignment;
UINT32 NearestByteAddress;
ACPI_FUNCTION_TRACE (ExPrepCommonFieldObject);
/*
* Note: the structure being initialized is the
* ACPI_COMMON_FIELD_INFO; No structure fields outside of the common
* area are initialized by this procedure.
*/
ObjDesc->CommonField.FieldFlags = FieldFlags;
ObjDesc->CommonField.Attribute = FieldAttribute;
ObjDesc->CommonField.BitLength = FieldBitLength;
/*
* Decode the access type so we can compute offsets. The access type gives
* two pieces of information - the width of each field access and the
* necessary ByteAlignment (address granularity) of the access.
*
* For AnyAcc, the AccessBitWidth is the largest width that is both
* necessary and possible in an attempt to access the whole field in one
* I/O operation. However, for AnyAcc, the ByteAlignment is always one
* byte.
*
* For all Buffer Fields, the ByteAlignment is always one byte.
*
* For all other access types (Byte, Word, Dword, Qword), the Bitwidth is
* the same (equivalent) as the ByteAlignment.
*/
AccessBitWidth = AcpiExDecodeFieldAccess (
ObjDesc, FieldFlags, &ByteAlignment);
if (!AccessBitWidth)
{
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
/* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */
ObjDesc->CommonField.AccessByteWidth = (UINT8)
ACPI_DIV_8 (AccessBitWidth);
/*
* BaseByteOffset is the address of the start of the field within the
* region. It is the byte address of the first *datum* (field-width data
* unit) of the field. (i.e., the first datum that contains at least the
* first *bit* of the field.)
*
* Note: ByteAlignment is always either equal to the AccessBitWidth or 8
* (Byte access), and it defines the addressing granularity of the parent
* region or buffer.
*/
NearestByteAddress =
ACPI_ROUND_BITS_DOWN_TO_BYTES (FieldBitPosition);
ObjDesc->CommonField.BaseByteOffset = (UINT32)
ACPI_ROUND_DOWN (NearestByteAddress, ByteAlignment);
/*
* StartFieldBitOffset is the offset of the first bit of the field within
* a field datum.
*/
ObjDesc->CommonField.StartFieldBitOffset = (UINT8)
(FieldBitPosition - ACPI_MUL_8 (ObjDesc->CommonField.BaseByteOffset));
return_ACPI_STATUS (AE_OK);
}
acpi_status
acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc,
u8 field_flags,
u8 field_attribute,
u32 field_bit_position, u32 field_bit_length)
{
u32 access_bit_width;
u32 byte_alignment;
u32 nearest_byte_address;
ACPI_FUNCTION_TRACE(ex_prep_common_field_object);
/*
* Note: the structure being initialized is the
* ACPI_COMMON_FIELD_INFO; No structure fields outside of the common
* area are initialized by this procedure.
*/
obj_desc->common_field.field_flags = field_flags;
obj_desc->common_field.attribute = field_attribute;
obj_desc->common_field.bit_length = field_bit_length;
/*
* Decode the access type so we can compute offsets. The access type gives
* two pieces of information - the width of each field access and the
* necessary byte_alignment (address granularity) of the access.
*
* For any_acc, the access_bit_width is the largest width that is both
* necessary and possible in an attempt to access the whole field in one
* I/O operation. However, for any_acc, the byte_alignment is always one
* byte.
*
* For all Buffer Fields, the byte_alignment is always one byte.
*
* For all other access types (Byte, Word, Dword, Qword), the Bitwidth is
* the same (equivalent) as the byte_alignment.
*/
access_bit_width =
acpi_ex_decode_field_access(obj_desc, field_flags, &byte_alignment);
if (!access_bit_width) {
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
}
/* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */
obj_desc->common_field.access_byte_width = (u8)
ACPI_DIV_8(access_bit_width);
/*
* base_byte_offset is the address of the start of the field within the
* region. It is the byte address of the first *datum* (field-width data
* unit) of the field. (i.e., the first datum that contains at least the
* first *bit* of the field.)
*
* Note: byte_alignment is always either equal to the access_bit_width or 8
* (Byte access), and it defines the addressing granularity of the parent
* region or buffer.
*/
nearest_byte_address =
ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position);
obj_desc->common_field.base_byte_offset = (u32)
ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment);
/*
* start_field_bit_offset is the offset of the first bit of the field within
* a field datum.
*/
obj_desc->common_field.start_field_bit_offset = (u8)
(field_bit_position -
ACPI_MUL_8(obj_desc->common_field.base_byte_offset));
return_ACPI_STATUS(AE_OK);
}
ACPI_STATUS
AnBuildLocalTables (
ACPI_NEW_TABLE_DESC *TableList)
{
UINT32 TableCount = 0;
ACPI_PHYSICAL_ADDRESS DsdtAddress = 0;
UINT32 XsdtSize;
ACPI_NEW_TABLE_DESC *NextTable;
UINT32 NextIndex;
ACPI_TABLE_FADT *ExternalFadt = NULL;
/*
* Update the table count. For the DSDT, it is not put into the XSDT.
* For the FADT, this table is already accounted for since we usually
* install a local FADT.
*/
NextTable = TableList;
while (NextTable)
{
if (!ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT) &&
!ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
TableCount++;
}
NextTable = NextTable->Next;
}
XsdtSize = BASE_XSDT_SIZE + (TableCount * sizeof (UINT64));
/* Build an XSDT */
LocalXSDT = AcpiOsAllocate (XsdtSize);
if (!LocalXSDT)
{
return (AE_NO_MEMORY);
}
memset (LocalXSDT, 0, XsdtSize);
LocalXSDT->TableOffsetEntry[0] = ACPI_PTR_TO_PHYSADDR (&LocalFADT);
/*
* Install the user tables. The DSDT must be installed in the FADT.
* All other tables are installed directly into the XSDT.
*
* Note: The tables are loaded in reverse order from the incoming
* input, which makes it match the command line order.
*/
NextIndex = BASE_XSDT_TABLES;
NextTable = TableList;
while (NextTable)
{
/*
* Incoming DSDT or FADT are special cases. All other tables are
* just immediately installed into the XSDT.
*/
if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT))
{
if (DsdtAddress)
{
printf ("Already found a DSDT, only one allowed\n");
return (AE_ALREADY_EXISTS);
}
/* The incoming user table is a DSDT */
DsdtAddress = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
}
else if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
ExternalFadt =
ACPI_CAST_PTR (ACPI_TABLE_FADT, NextTable->Table);
LocalXSDT->TableOffsetEntry[0] =
ACPI_PTR_TO_PHYSADDR (NextTable->Table);
}
else
{
/* Install the table in the XSDT */
LocalXSDT->TableOffsetEntry[TableCount - NextIndex + 1] =
ACPI_PTR_TO_PHYSADDR (NextTable->Table);
NextIndex++;
}
NextTable = NextTable->Next;
}
/* Build an RSDP. Contains a valid XSDT only, no RSDT */
memset (&LocalRSDP, 0, sizeof (ACPI_TABLE_RSDP));
ACPI_MAKE_RSDP_SIG (LocalRSDP.Signature);
memcpy (LocalRSDP.OemId, "Intel", 6);
LocalRSDP.Revision = 2;
LocalRSDP.XsdtPhysicalAddress = ACPI_PTR_TO_PHYSADDR (LocalXSDT);
LocalRSDP.Length = sizeof (ACPI_TABLE_XSDT);
/* Set checksums for both XSDT and RSDP */
AnInitializeTableHeader ((void *) LocalXSDT, ACPI_SIG_XSDT, XsdtSize);
LocalRSDP.Checksum = 0;
LocalRSDP.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalRSDP, ACPI_RSDP_CHECKSUM_LENGTH);
if (!DsdtAddress)
{
return (AE_SUPPORT);
}
/*
* Build an FADT. There are two options for the FADT:
* 1) Incoming external FADT specified on the command line
* 2) A fully featured local FADT
*/
memset (&LocalFADT, 0, sizeof (ACPI_TABLE_FADT));
if (ExternalFadt)
{
/*
* Use the external FADT, but we must update the DSDT/FACS
* addresses as well as the checksum
*/
ExternalFadt->Dsdt = (UINT32) DsdtAddress;
ExternalFadt->Facs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
/*
* If there room in the FADT for the XDsdt and XFacs 64-bit
* pointers, use them.
*/
if (ExternalFadt->Header.Length > ACPI_PTR_DIFF (
&ExternalFadt->XDsdt, ExternalFadt))
{
ExternalFadt->Dsdt = 0;
ExternalFadt->Facs = 0;
ExternalFadt->XDsdt = DsdtAddress;
ExternalFadt->XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
}
/* Complete the external FADT with the checksum */
ExternalFadt->Header.Checksum = 0;
ExternalFadt->Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) ExternalFadt, ExternalFadt->Header.Length);
}
else
{
/*
* Build a local FADT so we can test the hardware/event init
*/
LocalFADT.Header.Revision = 5;
/* Setup FADT header and DSDT/FACS addresses */
LocalFADT.Dsdt = 0;
LocalFADT.Facs = 0;
LocalFADT.XDsdt = DsdtAddress;
LocalFADT.XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
/* Miscellaneous FADT fields */
LocalFADT.Gpe0BlockLength = 16;
LocalFADT.Gpe0Block = 0x00001234;
LocalFADT.Gpe1BlockLength = 6;
LocalFADT.Gpe1Block = 0x00005678;
LocalFADT.Gpe1Base = 96;
LocalFADT.Pm1EventLength = 4;
LocalFADT.Pm1aEventBlock = 0x00001aaa;
LocalFADT.Pm1bEventBlock = 0x00001bbb;
LocalFADT.Pm1ControlLength = 2;
LocalFADT.Pm1aControlBlock = 0xB0;
LocalFADT.PmTimerLength = 4;
LocalFADT.PmTimerBlock = 0xA0;
LocalFADT.Pm2ControlBlock = 0xC0;
LocalFADT.Pm2ControlLength = 1;
/* Setup one example X-64 field */
LocalFADT.XPm1bEventBlock.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
LocalFADT.XPm1bEventBlock.Address = LocalFADT.Pm1bEventBlock;
LocalFADT.XPm1bEventBlock.BitWidth = (UINT8)
ACPI_MUL_8 (LocalFADT.Pm1EventLength);
}
AnInitializeTableHeader ((void *) &LocalFADT,
ACPI_SIG_FADT, sizeof (ACPI_TABLE_FADT));
/* Build a FACS */
memset (&LocalFACS, 0, sizeof (ACPI_TABLE_FACS));
ACPI_MOVE_NAME (LocalFACS.Signature, ACPI_SIG_FACS);
LocalFACS.Length = sizeof (ACPI_TABLE_FACS);
LocalFACS.GlobalLock = 0x11AA0011;
return (AE_OK);
}
static void
AcpiTbConvertFadt (
void)
{
const char *Name;
ACPI_GENERIC_ADDRESS *Address64;
UINT32 Address32;
UINT8 Length;
UINT8 Flags;
UINT32 i;
/*
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
* should be zero are indeed zero. This will workaround BIOSs that
* inadvertently place values in these fields.
*
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
* at offset 45, 55, 95, and the word located at offset 109, 110.
*
* Note: The FADT revision value is unreliable. Only the length can be
* trusted.
*/
if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE)
{
AcpiGbl_FADT.PreferredProfile = 0;
AcpiGbl_FADT.PstateControl = 0;
AcpiGbl_FADT.CstControl = 0;
AcpiGbl_FADT.BootFlags = 0;
}
/*
* Now we can update the local FADT length to the length of the
* current FADT version as defined by the ACPI specification.
* Thus, we will have a common FADT internally.
*/
AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT);
/*
* Expand the 32-bit DSDT addresses to 64-bit as necessary.
* Later ACPICA code will always use the X 64-bit field.
*/
AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT",
AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt);
/* If Hardware Reduced flag is set, we are all done */
if (AcpiGbl_ReducedHardware)
{
return;
}
/* Examine all of the 64-bit extended address fields (X fields) */
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
{
/*
* Get the 32-bit and 64-bit addresses, as well as the register
* length and register name.
*/
Address32 = *ACPI_ADD_PTR (UINT32,
&AcpiGbl_FADT, FadtInfoTable[i].Address32);
Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS,
&AcpiGbl_FADT, FadtInfoTable[i].Address64);
Length = *ACPI_ADD_PTR (UINT8,
&AcpiGbl_FADT, FadtInfoTable[i].Length);
Name = FadtInfoTable[i].Name;
Flags = FadtInfoTable[i].Flags;
/*
* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
* generic address structures as necessary. Later code will always use
* the 64-bit address structures.
*
* November 2013:
* Now always use the 64-bit address if it is valid (non-zero), in
* accordance with the ACPI specification which states that a 64-bit
* address supersedes the 32-bit version. This behavior can be
* overridden by the AcpiGbl_Use32BitFadtAddresses flag.
*
* During 64-bit address construction and verification,
* these cases are handled:
*
* Address32 zero, Address64 [don't care] - Use Address64
*
* No override: if AcpiGbl_Use32BitFadtAddresses is FALSE, and:
* Address32 non-zero, Address64 zero - Copy/use Address32
* Address32 non-zero == Address64 non-zero - Use Address64
* Address32 non-zero != Address64 non-zero - Warning, use Address64
*
* Override: if AcpiGbl_Use32BitFadtAddresses is TRUE, and:
* Address32 non-zero, Address64 zero - Copy/use Address32
* Address32 non-zero == Address64 non-zero - Copy/use Address32
* Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
*
* Note: SpaceId is always I/O for 32-bit legacy address fields
*/
if (Address32)
{
if (Address64->Address)
{
if (Address64->Address != (UINT64) Address32)
{
/* Address mismatch */
ACPI_BIOS_WARNING ((AE_INFO,
"32/64X address mismatch in FADT/%s: "
"0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
Name, Address32,
ACPI_FORMAT_UINT64 (Address64->Address),
AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
}
/*
* For each extended field, check for length mismatch
* between the legacy length field and the corresponding
* 64-bit X length field.
* Note: If the legacy length field is > 0xFF bits, ignore
* this check. (GPE registers can be larger than the
* 64-bit GAS structure can accommodate, 0xFF bits).
*/
if ((ACPI_MUL_8 (Length) <= ACPI_UINT8_MAX) &&
(Address64->BitWidth != ACPI_MUL_8 (Length)))
{
ACPI_BIOS_WARNING ((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",
Name, ACPI_MUL_8 (Length), Address64->BitWidth));
}
}
/*
* Hardware register access code always uses the 64-bit fields.
* So if the 64-bit field is zero or is to be overridden,
* initialize it with the 32-bit fields.
* Note that when the 32-bit address favor is specified, the
* 64-bit fields are always re-initialized so that
* AccessSize/BitWidth/BitOffset fields can be correctly
* configured to the values to trigger a 32-bit compatible
* access mode in the hardware register access code.
*/
if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses)
{
AcpiTbInitGenericAddress (Address64,
ACPI_ADR_SPACE_SYSTEM_IO, Length,
(UINT64) Address32, Name, Flags);
}
}
if (FadtInfoTable[i].Flags & ACPI_FADT_REQUIRED)
{
/*
* Field is required (PM1aEvent, PM1aControl).
* Both the address and length must be non-zero.
*/
if (!Address64->Address || !Length)
{
ACPI_BIOS_ERROR ((AE_INFO,
"Required FADT field %s has zero address and/or length: "
"0x%8.8X%8.8X/0x%X",
Name, ACPI_FORMAT_UINT64 (Address64->Address), Length));
}
}
else if (FadtInfoTable[i].Flags & ACPI_FADT_SEPARATE_LENGTH)
{
/*
* Field is optional (PM2Control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must
* be valid.
*/
if ((Address64->Address && !Length) ||
(!Address64->Address && Length))
{
ACPI_BIOS_WARNING ((AE_INFO,
"Optional FADT field %s has valid %s but zero %s: "
"0x%8.8X%8.8X/0x%X", Name,
(Length ? "Length" : "Address"),
(Length ? "Address": "Length"),
ACPI_FORMAT_UINT64 (Address64->Address), Length));
}
}
}
}
acpi_status
acpi_ex_access_region (
union acpi_operand_object *obj_desc,
u32 field_datum_byte_offset,
acpi_integer *value,
u32 function)
{
acpi_status status;
union acpi_operand_object *rgn_desc;
acpi_physical_address address;
ACPI_FUNCTION_TRACE ("ex_access_region");
/*
* Ensure that the region operands are fully evaluated and verify
* the validity of the request
*/
status = acpi_ex_setup_region (obj_desc, field_datum_byte_offset);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* The physical address of this field datum is:
*
* 1) The base of the region, plus
* 2) The base offset of the field, plus
* 3) The current offset into the field
*/
rgn_desc = obj_desc->common_field.region_obj;
address = rgn_desc->region.address
+ obj_desc->common_field.base_byte_offset
+ field_datum_byte_offset;
if ((function & ACPI_IO_MASK) == ACPI_READ) {
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[WRITE]"));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_BFIELD,
" Region [%s:%X], Width %X, byte_base %X, Offset %X at %8.8X%8.8X\n",
acpi_ut_get_region_name (rgn_desc->region.space_id),
rgn_desc->region.space_id,
obj_desc->common_field.access_byte_width,
obj_desc->common_field.base_byte_offset,
field_datum_byte_offset,
ACPI_FORMAT_UINT64 (address)));
/* Invoke the appropriate address_space/op_region handler */
status = acpi_ev_address_space_dispatch (rgn_desc, function,
address, ACPI_MUL_8 (obj_desc->common_field.access_byte_width), value);
if (ACPI_FAILURE (status)) {
if (status == AE_NOT_IMPLEMENTED) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Region %s(%X) not implemented\n",
acpi_ut_get_region_name (rgn_desc->region.space_id),
rgn_desc->region.space_id));
}
else if (status == AE_NOT_EXIST) {
ACPI_REPORT_ERROR ((
"Region %s(%X) has no handler\n",
acpi_ut_get_region_name (rgn_desc->region.space_id),
rgn_desc->region.space_id));
}
}
return_ACPI_STATUS (status);
}
ACPI_STATUS
AeBuildLocalTables (
UINT32 TableCount,
AE_TABLE_DESC *TableList)
{
ACPI_PHYSICAL_ADDRESS DsdtAddress = 0;
UINT32 XsdtSize;
AE_TABLE_DESC *NextTable;
UINT32 NextIndex;
ACPI_TABLE_FADT *ExternalFadt = NULL;
/*
* Update the table count. For the DSDT, it is not put into the XSDT.
* For the FADT, this table is already accounted for since we usually
* install a local FADT.
*/
NextTable = TableList;
while (NextTable)
{
if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT) ||
ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
TableCount--;
}
NextTable = NextTable->Next;
}
XsdtSize = (((TableCount + 1) * sizeof (UINT64)) + sizeof (ACPI_TABLE_HEADER));
if (AcpiGbl_LoadTestTables)
{
XsdtSize += BASE_XSDT_SIZE;
}
/* Build an XSDT */
LocalXSDT = AcpiOsAllocate (XsdtSize);
if (!LocalXSDT)
{
return (AE_NO_MEMORY);
}
memset (LocalXSDT, 0, XsdtSize);
AeInitializeTableHeader ((void *) LocalXSDT, ACPI_SIG_XSDT, XsdtSize);
LocalXSDT->TableOffsetEntry[0] = ACPI_PTR_TO_PHYSADDR (&LocalFADT);
NextIndex = 1;
/*
* Install the user tables. The DSDT must be installed in the FADT.
* All other tables are installed directly into the XSDT.
*
* Note: The tables are loaded in reverse order from the incoming
* input, which makes it match the command line order.
*/
NextTable = TableList;
while (NextTable)
{
/*
* Incoming DSDT or FADT are special cases. All other tables are
* just immediately installed into the XSDT.
*/
if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT))
{
if (DsdtAddress)
{
printf ("Already found a DSDT, only one allowed\n");
return (AE_ALREADY_EXISTS);
}
/* The incoming user table is a DSDT */
DsdtAddress = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
DsdtToInstallOverride = NextTable->Table;
}
else if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
ExternalFadt = ACPI_CAST_PTR (ACPI_TABLE_FADT, NextTable->Table);
LocalXSDT->TableOffsetEntry[0] = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
}
else
{
/* Install the table in the XSDT */
LocalXSDT->TableOffsetEntry[TableCount - NextIndex + 1] =
ACPI_PTR_TO_PHYSADDR (NextTable->Table);
NextIndex++;
}
NextTable = NextTable->Next;
}
/* Install the optional extra local tables */
if (AcpiGbl_LoadTestTables)
{
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&LocalTEST);
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&LocalBADTABLE);
/* Install two SSDTs to test multiple table support */
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&Ssdt1Code);
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&Ssdt2Code);
/* Install the OEM1 table to test LoadTable */
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&Oem1Code);
/* Install the OEMx table to test LoadTable */
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&OemxCode);
/* Install the ECDT table to test _REG */
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&EcdtCode);
/* Install two UEFIs to test multiple table support */
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&Uefi1Code);
LocalXSDT->TableOffsetEntry[NextIndex++] = ACPI_PTR_TO_PHYSADDR (&Uefi2Code);
}
/* Build an RSDP. Contains a valid XSDT only, no RSDT */
memset (&LocalRSDP, 0, sizeof (ACPI_TABLE_RSDP));
ACPI_MAKE_RSDP_SIG (LocalRSDP.Signature);
memcpy (LocalRSDP.OemId, "Intel", 6);
LocalRSDP.Revision = 2;
LocalRSDP.XsdtPhysicalAddress = ACPI_PTR_TO_PHYSADDR (LocalXSDT);
LocalRSDP.Length = sizeof (ACPI_TABLE_RSDP);
/* Set checksums for both XSDT and RSDP */
LocalXSDT->Header.Checksum = 0;
LocalXSDT->Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) LocalXSDT, LocalXSDT->Header.Length);
LocalRSDP.Checksum = 0;
LocalRSDP.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalRSDP, ACPI_RSDP_CHECKSUM_LENGTH);
if (!DsdtAddress)
{
/* Use the local DSDT because incoming table(s) are all SSDT(s) */
DsdtAddress = ACPI_PTR_TO_PHYSADDR (LocalDsdtCode);
DsdtToInstallOverride = ACPI_CAST_PTR (ACPI_TABLE_HEADER, LocalDsdtCode);
}
/*
* Build an FADT. There are three options for the FADT:
* 1) Incoming external FADT specified on the command line
* 2) A "hardware reduced" local FADT
* 3) A fully featured local FADT
*/
memset (&LocalFADT, 0, sizeof (ACPI_TABLE_FADT));
if (ExternalFadt)
{
/*
* Use the external FADT, but we must update the DSDT/FACS addresses
* as well as the checksum
*/
ExternalFadt->Dsdt = (UINT32) DsdtAddress;
if (!AcpiGbl_ReducedHardware)
{
ExternalFadt->Facs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
}
/* Is there room in the FADT for the XDsdst and XFacs 64-bit pointers? */
if (ExternalFadt->Header.Length > ACPI_PTR_DIFF (&ExternalFadt->XDsdt, ExternalFadt))
{
ExternalFadt->XDsdt = DsdtAddress;
if (!AcpiGbl_ReducedHardware)
{
ExternalFadt->XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
}
}
/* Complete the FADT with the checksum */
ExternalFadt->Header.Checksum = 0;
ExternalFadt->Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) ExternalFadt, ExternalFadt->Header.Length);
}
else if (AcpiGbl_UseHwReducedFadt)
{
memcpy (&LocalFADT, HwReducedFadtCode, ACPI_FADT_V5_SIZE);
LocalFADT.Dsdt = (UINT32) DsdtAddress;
LocalFADT.XDsdt = DsdtAddress;
LocalFADT.Header.Checksum = 0;
LocalFADT.Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalFADT, LocalFADT.Header.Length);
}
else
{
/*
* Build a local FADT so we can test the hardware/event init
*/
LocalFADT.Header.Revision = 5;
AeInitializeTableHeader ((void *) &LocalFADT, ACPI_SIG_FADT, sizeof (ACPI_TABLE_FADT));
/* Setup FADT header and DSDT/FACS addresses */
LocalFADT.Dsdt = 0;
LocalFADT.Facs = 0;
LocalFADT.XDsdt = DsdtAddress;
LocalFADT.XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
/* Miscellaneous FADT fields */
LocalFADT.Gpe0BlockLength = 0x08;
LocalFADT.Gpe0Block = 0x00001234;
LocalFADT.Gpe1BlockLength = 0x80;
LocalFADT.Gpe1Block = 0x00005678;
LocalFADT.Gpe1Base = 100;
LocalFADT.Pm1EventLength = 4;
LocalFADT.Pm1aEventBlock = 0x00001aaa;
LocalFADT.Pm1bEventBlock = 0x00001bbb;
LocalFADT.Pm1ControlLength = 2;
LocalFADT.Pm1aControlBlock = 0xB0;
LocalFADT.PmTimerLength = 4;
LocalFADT.PmTimerBlock = 0xA0;
LocalFADT.Pm2ControlBlock = 0xC0;
LocalFADT.Pm2ControlLength = 1;
/* Setup one example X-64 GAS field */
LocalFADT.XPm1bEventBlock.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
LocalFADT.XPm1bEventBlock.Address = LocalFADT.Pm1bEventBlock;
LocalFADT.XPm1bEventBlock.BitWidth = (UINT8) ACPI_MUL_8 (LocalFADT.Pm1EventLength);
/* Complete the FADT with the checksum */
LocalFADT.Header.Checksum = 0;
LocalFADT.Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalFADT, LocalFADT.Header.Length);
}
/* Build a FACS */
memset (&LocalFACS, 0, sizeof (ACPI_TABLE_FACS));
ACPI_MOVE_NAME (LocalFACS.Signature, ACPI_SIG_FACS);
LocalFACS.Length = sizeof (ACPI_TABLE_FACS);
LocalFACS.GlobalLock = 0x11AA0011;
/* Build the optional local tables */
if (AcpiGbl_LoadTestTables)
{
/*
* Build a fake table [TEST] so that we make sure that the
* ACPICA core ignores it
*/
memset (&LocalTEST, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_MOVE_NAME (LocalTEST.Signature, "TEST");
LocalTEST.Revision = 1;
LocalTEST.Length = sizeof (ACPI_TABLE_HEADER);
LocalTEST.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalTEST, LocalTEST.Length);
/*
* Build a fake table with a bad signature [BAD!] so that we make
* sure that the ACPICA core ignores it
*/
memset (&LocalBADTABLE, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_MOVE_NAME (LocalBADTABLE.Signature, "BAD!");
LocalBADTABLE.Revision = 1;
LocalBADTABLE.Length = sizeof (ACPI_TABLE_HEADER);
LocalBADTABLE.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalBADTABLE, LocalBADTABLE.Length);
}
return (AE_OK);
}
void
AcpiDmCheckResourceReference (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_PARSE_OBJECT *BufferNameOp;
ACPI_PARSE_OBJECT *IndexOp;
ACPI_NAMESPACE_NODE *BufferNode;
ACPI_NAMESPACE_NODE *ResourceNode;
const ACPI_OPCODE_INFO *OpInfo;
UINT32 BitIndex;
/* We are only interested in the CreateXxxxField opcodes */
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (OpInfo->Type != AML_TYPE_CREATE_FIELD)
{
return;
}
/* Get the buffer term operand */
BufferNameOp = AcpiPsGetDepthNext (NULL, Op);
/* Must be a named buffer, not an arg or local or method call */
if (BufferNameOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP)
{
return;
}
/* Get the Index term, must be an integer constant to convert */
IndexOp = BufferNameOp->Common.Next;
/* Major cheat: The Node field is also used for the Tag ptr. Clear it now */
IndexOp->Common.Node = NULL;
OpInfo = AcpiPsGetOpcodeInfo (IndexOp->Common.AmlOpcode);
if (OpInfo->ObjectType != ACPI_TYPE_INTEGER)
{
return;
}
/* Get the bit offset of the descriptor within the buffer */
if ((Op->Common.AmlOpcode == AML_CREATE_BIT_FIELD_OP) ||
(Op->Common.AmlOpcode == AML_CREATE_FIELD_OP))
{
/* Index operand is a bit offset */
BitIndex = (UINT32) IndexOp->Common.Value.Integer;
}
else
{
/* Index operand is a byte offset, convert to bits */
BitIndex = (UINT32) ACPI_MUL_8 (IndexOp->Common.Value.Integer);
}
/* Lookup the buffer in the namespace */
Status = AcpiNsLookup (WalkState->ScopeInfo,
BufferNameOp->Common.Value.String, ACPI_TYPE_BUFFER,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState,
&BufferNode);
if (ACPI_FAILURE (Status))
{
return;
}
/* Validate object type, we must have a buffer */
if (BufferNode->Type != ACPI_TYPE_BUFFER)
{
return;
}
/* Find the resource descriptor node corresponding to the index */
ResourceNode = AcpiDmGetResourceNode (BufferNode, BitIndex);
if (!ResourceNode)
{
return;
}
/* Translate the Index to a resource tag pathname */
AcpiGetTagPathname (IndexOp, BufferNode, ResourceNode, BitIndex);
}
void
AcpiDbDisplayGpes (
void)
{
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
UINT32 GpeIndex;
UINT32 Block = 0;
UINT32 i;
UINT32 j;
char Buffer[80];
ACPI_BUFFER RetBuf;
ACPI_STATUS Status;
RetBuf.Length = sizeof (Buffer);
RetBuf.Pointer = Buffer;
Block = 0;
/* Walk the GPE lists */
GpeXruptInfo = AcpiGbl_GpeXruptListHead;
while (GpeXruptInfo)
{
GpeBlock = GpeXruptInfo->GpeBlockListHead;
while (GpeBlock)
{
Status = AcpiGetName (GpeBlock->Node, ACPI_FULL_PATHNAME, &RetBuf);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Could not convert name to pathname\n");
}
AcpiOsPrintf ("\nBlock %d - Info %p DeviceNode %p [%s]\n",
Block, GpeBlock, GpeBlock->Node, Buffer);
AcpiOsPrintf (" Registers: %u (%u GPEs)\n",
GpeBlock->RegisterCount,
ACPI_MUL_8 (GpeBlock->RegisterCount));
AcpiOsPrintf (" GPE range: 0x%X to 0x%X\n",
GpeBlock->BlockBaseNumber,
GpeBlock->BlockBaseNumber +
(GpeBlock->RegisterCount * 8) -1);
AcpiOsPrintf (
" RegisterInfo: %p Status %8.8X%8.8X Enable %8.8X%8.8X\n",
GpeBlock->RegisterInfo,
ACPI_FORMAT_UINT64 (GpeBlock->RegisterInfo->StatusAddress.Address),
ACPI_FORMAT_UINT64 (GpeBlock->RegisterInfo->EnableAddress.Address));
AcpiOsPrintf (" EventInfo: %p\n", GpeBlock->EventInfo);
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
AcpiOsPrintf (
" Reg %u: WakeEnable %2.2X, RunEnable %2.2X Status %8.8X%8.8X Enable %8.8X%8.8X\n",
i, GpeRegisterInfo->EnableForWake,
GpeRegisterInfo->EnableForRun,
ACPI_FORMAT_UINT64 (GpeRegisterInfo->StatusAddress.Address),
ACPI_FORMAT_UINT64 (GpeRegisterInfo->EnableAddress.Address));
/* Now look at the individual GPEs in this byte register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
{
GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
if (!(GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK))
{
/* This GPE is not used (no method or handler) */
continue;
}
AcpiOsPrintf (
" GPE %.3X: %p Flags %2.2X: ",
GpeBlock->BlockBaseNumber + GpeIndex,
GpeEventInfo,
GpeEventInfo->Flags);
if (GpeEventInfo->Flags & ACPI_GPE_LEVEL_TRIGGERED)
{
AcpiOsPrintf ("Level, ");
}
else
{
AcpiOsPrintf ("Edge, ");
}
switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK)
{
case ACPI_GPE_TYPE_WAKE:
AcpiOsPrintf ("WakeOnly: ");
break;
case ACPI_GPE_TYPE_RUNTIME:
AcpiOsPrintf (" RunOnly: ");
break;
case ACPI_GPE_TYPE_WAKE_RUN:
AcpiOsPrintf (" WakeRun: ");
break;
default:
AcpiOsPrintf (" NotUsed: ");
break;
}
if (GpeEventInfo->Flags & ACPI_GPE_WAKE_ENABLED)
{
AcpiOsPrintf ("[Wake 1 ");
}
else
{
AcpiOsPrintf ("[Wake 0 ");
}
if (GpeEventInfo->Flags & ACPI_GPE_RUN_ENABLED)
{
AcpiOsPrintf ("Run 1], ");
}
else
{
AcpiOsPrintf ("Run 0], ");
}
switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
{
case ACPI_GPE_DISPATCH_NOT_USED:
AcpiOsPrintf ("NotUsed");
break;
case ACPI_GPE_DISPATCH_HANDLER:
AcpiOsPrintf ("Handler");
break;
case ACPI_GPE_DISPATCH_METHOD:
AcpiOsPrintf ("Method");
break;
default:
AcpiOsPrintf ("UNKNOWN: %X",
GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK);
break;
}
AcpiOsPrintf ("\n");
}
}
Block++;
GpeBlock = GpeBlock->Next;
}
GpeXruptInfo = GpeXruptInfo->Next;
}
}
acpi_status
acpi_ex_prep_common_field_object (
union acpi_operand_object *obj_desc,
u8 field_flags,
u8 field_attribute,
u32 field_bit_position,
u32 field_bit_length)
{
u32 access_bit_width;
u32 byte_alignment;
u32 nearest_byte_address;
ACPI_FUNCTION_TRACE ("ex_prep_common_field_object");
/*
* Note: the structure being initialized is the
* ACPI_COMMON_FIELD_INFO; No structure fields outside of the common
* area are initialized by this procedure.
*/
obj_desc->common_field.field_flags = field_flags;
obj_desc->common_field.attribute = field_attribute;
obj_desc->common_field.bit_length = field_bit_length;
/*
* Decode the access type so we can compute offsets. The access type gives
* two pieces of information - the width of each field access and the
* necessary byte_alignment (address granularity) of the access.
*
* For any_acc, the access_bit_width is the largest width that is both
* necessary and possible in an attempt to access the whole field in one
* I/O operation. However, for any_acc, the byte_alignment is always one
* byte.
*
* For all Buffer Fields, the byte_alignment is always one byte.
*
* For all other access types (Byte, Word, Dword, Qword), the Bitwidth is
* the same (equivalent) as the byte_alignment.
*/
access_bit_width = acpi_ex_decode_field_access (obj_desc, field_flags,
&byte_alignment);
if (!access_bit_width) {
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
/* Setup width (access granularity) fields */
obj_desc->common_field.access_byte_width = (u8)
ACPI_DIV_8 (access_bit_width); /* 1, 2, 4, 8 */
/*
* base_byte_offset is the address of the start of the field within the
* region. It is the byte address of the first *datum* (field-width data
* unit) of the field. (i.e., the first datum that contains at least the
* first *bit* of the field.)
*
* Note: byte_alignment is always either equal to the access_bit_width or 8
* (Byte access), and it defines the addressing granularity of the parent
* region or buffer.
*/
nearest_byte_address =
ACPI_ROUND_BITS_DOWN_TO_BYTES (field_bit_position);
obj_desc->common_field.base_byte_offset =
ACPI_ROUND_DOWN (nearest_byte_address, byte_alignment);
/*
* start_field_bit_offset is the offset of the first bit of the field within
* a field datum.
*/
obj_desc->common_field.start_field_bit_offset = (u8)
(field_bit_position - ACPI_MUL_8 (obj_desc->common_field.base_byte_offset));
/*
* Valid bits -- the number of bits that compose a partial datum,
* 1) At the end of the field within the region (arbitrary starting bit
* offset)
* 2) At the end of a buffer used to contain the field (starting offset
* always zero)
*/
obj_desc->common_field.end_field_valid_bits = (u8)
((obj_desc->common_field.start_field_bit_offset + field_bit_length) %
access_bit_width);
/* start_buffer_bit_offset always = 0 */
obj_desc->common_field.end_buffer_valid_bits = (u8)
(field_bit_length % access_bit_width);
/*
* datum_valid_bits is the number of valid field bits in the first
* field datum.
*/
obj_desc->common_field.datum_valid_bits = (u8)
(access_bit_width - obj_desc->common_field.start_field_bit_offset);
/*
* Does the entire field fit within a single field access element? (datum)
* (i.e., without crossing a datum boundary)
*/
if ((obj_desc->common_field.start_field_bit_offset + field_bit_length) <=
(u16) access_bit_width) {
obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM;
}
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiExAccessRegion (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT32 FieldDatumByteOffset,
UINT64 *Value,
UINT32 Function)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *RgnDesc;
UINT32 RegionOffset;
ACPI_FUNCTION_TRACE (ExAccessRegion);
/*
* Ensure that the region operands are fully evaluated and verify
* the validity of the request
*/
Status = AcpiExSetupRegion (ObjDesc, FieldDatumByteOffset);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* The physical address of this field datum is:
*
* 1) The base of the region, plus
* 2) The base offset of the field, plus
* 3) The current offset into the field
*/
RgnDesc = ObjDesc->CommonField.RegionObj;
RegionOffset =
ObjDesc->CommonField.BaseByteOffset +
FieldDatumByteOffset;
if ((Function & ACPI_IO_MASK) == ACPI_READ)
{
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[WRITE]"));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_BFIELD,
" Region [%s:%X], Width %X, ByteBase %X, Offset %X at %8.8X%8.8X\n",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId,
ObjDesc->CommonField.AccessByteWidth,
ObjDesc->CommonField.BaseByteOffset,
FieldDatumByteOffset,
ACPI_FORMAT_UINT64 (RgnDesc->Region.Address + RegionOffset)));
/* Invoke the appropriate AddressSpace/OpRegion handler */
Status = AcpiEvAddressSpaceDispatch (RgnDesc, ObjDesc,
Function, RegionOffset,
ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth), Value);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_IMPLEMENTED)
{
ACPI_ERROR ((AE_INFO,
"Region %s (ID=%u) not implemented",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId));
}
else if (Status == AE_NOT_EXIST)
{
ACPI_ERROR ((AE_INFO,
"Region %s (ID=%u) has no handler",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId));
}
}
return_ACPI_STATUS (Status);
}
static void acpi_tb_validate_fadt(void)
{
char *name;
struct acpi_generic_address *address64;
u8 length;
u32 i;
/*
* Check for FACS and DSDT address mismatches. An address mismatch between
* the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
* DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables.
*/
if (acpi_gbl_FADT.facs &&
(acpi_gbl_FADT.Xfacs != (u64)acpi_gbl_FADT.facs)) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X FACS address mismatch in FADT - "
"0x%8.8X/0x%8.8X%8.8X, using 32",
acpi_gbl_FADT.facs,
ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs)));
acpi_gbl_FADT.Xfacs = (u64)acpi_gbl_FADT.facs;
}
if (acpi_gbl_FADT.dsdt &&
(acpi_gbl_FADT.Xdsdt != (u64)acpi_gbl_FADT.dsdt)) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X DSDT address mismatch in FADT - "
"0x%8.8X/0x%8.8X%8.8X, using 32",
acpi_gbl_FADT.dsdt,
ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt)));
acpi_gbl_FADT.Xdsdt = (u64)acpi_gbl_FADT.dsdt;
}
/* If Hardware Reduced flag is set, we are all done */
if (acpi_gbl_reduced_hardware) {
return;
}
/* Examine all of the 64-bit extended address fields (X fields) */
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
/*
* Generate pointer to the 64-bit address, get the register
* length (width) and the register name
*/
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
length =
*ACPI_ADD_PTR(u8, &acpi_gbl_FADT,
fadt_info_table[i].length);
name = fadt_info_table[i].name;
/*
* For each extended field, check for length mismatch between the
* legacy length field and the corresponding 64-bit X length field.
*/
if (address64->address &&
(address64->bit_width != ACPI_MUL_8(length))) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",
name, ACPI_MUL_8(length),
address64->bit_width));
}
if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
/*
* Field is required (Pm1a_event, Pm1a_control, pm_timer).
* Both the address and length must be non-zero.
*/
if (!address64->address || !length) {
ACPI_BIOS_ERROR((AE_INFO,
"Required FADT field %s has zero address and/or length: "
"0x%8.8X%8.8X/0x%X",
name,
ACPI_FORMAT_UINT64(address64->
address),
length));
}
} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
/*
* Field is optional (Pm2_control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must
* be valid.
*/
if ((address64->address && !length) ||
(!address64->address && length)) {
ACPI_BIOS_WARNING((AE_INFO,
"Optional FADT field %s has zero address or length: "
"0x%8.8X%8.8X/0x%X",
name,
ACPI_FORMAT_UINT64
(address64->address),
length));
}
}
}
}
ACPI_STATUS
AeBuildLocalTables (
UINT32 TableCount,
AE_TABLE_DESC *TableList)
{
ACPI_PHYSICAL_ADDRESS DsdtAddress = 0;
UINT32 XsdtSize;
AE_TABLE_DESC *NextTable;
UINT32 NextIndex;
ACPI_TABLE_FADT *ExternalFadt = NULL;
/*
* Update the table count. For DSDT, it is not put into the XSDT. For
* FADT, this is already accounted for since we usually install a
* local FADT.
*/
NextTable = TableList;
while (NextTable)
{
if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT) ||
ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
TableCount--;
}
NextTable = NextTable->Next;
}
XsdtSize = BASE_XSDT_SIZE + (TableCount * sizeof (UINT64));
/* Build an XSDT */
LocalXSDT = AcpiOsAllocate (XsdtSize);
if (!LocalXSDT)
{
return (AE_NO_MEMORY);
}
ACPI_MEMSET (LocalXSDT, 0, XsdtSize);
ACPI_STRNCPY (LocalXSDT->Header.Signature, ACPI_SIG_XSDT, 4);
LocalXSDT->Header.Length = XsdtSize;
LocalXSDT->Header.Revision = 1;
LocalXSDT->TableOffsetEntry[0] = ACPI_PTR_TO_PHYSADDR (&LocalTEST);
LocalXSDT->TableOffsetEntry[1] = ACPI_PTR_TO_PHYSADDR (&LocalBADTABLE);
LocalXSDT->TableOffsetEntry[2] = ACPI_PTR_TO_PHYSADDR (&LocalFADT);
/* Install two SSDTs to test multiple table support */
LocalXSDT->TableOffsetEntry[3] = ACPI_PTR_TO_PHYSADDR (&Ssdt1Code);
LocalXSDT->TableOffsetEntry[4] = ACPI_PTR_TO_PHYSADDR (&Ssdt2Code);
/* Install the OEM1 table to test LoadTable */
LocalXSDT->TableOffsetEntry[5] = ACPI_PTR_TO_PHYSADDR (&Oem1Code);
/* Install the OEMx table to test LoadTable */
LocalXSDT->TableOffsetEntry[6] = ACPI_PTR_TO_PHYSADDR (&OemxCode);
/* Install the ECDT table to test _REG */
LocalXSDT->TableOffsetEntry[7] = ACPI_PTR_TO_PHYSADDR (&EcdtCode);
/*
* Install the user tables. The DSDT must be installed in the FADT.
* All other tables are installed directly into the XSDT.
*/
NextIndex = BASE_XSDT_TABLES;
NextTable = TableList;
while (NextTable)
{
/*
* Incoming DSDT or FADT are special cases. All other tables are
* just immediately installed into the XSDT.
*/
if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_DSDT))
{
if (DsdtAddress)
{
printf ("Already found a DSDT, only one allowed\n");
return (AE_ALREADY_EXISTS);
}
/* The incoming user table is a DSDT */
DsdtAddress = ACPI_PTR_TO_PHYSADDR (&DsdtCode);
DsdtToInstallOverride = NextTable->Table;
}
else if (ACPI_COMPARE_NAME (NextTable->Table->Signature, ACPI_SIG_FADT))
{
ExternalFadt = ACPI_CAST_PTR (ACPI_TABLE_FADT, NextTable->Table);
LocalXSDT->TableOffsetEntry[2] = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
}
else
{
/* Install the table in the XSDT */
LocalXSDT->TableOffsetEntry[NextIndex] = ACPI_PTR_TO_PHYSADDR (NextTable->Table);
NextIndex++;
}
NextTable = NextTable->Next;
}
/* Build an RSDP */
ACPI_MEMSET (&LocalRSDP, 0, sizeof (ACPI_TABLE_RSDP));
ACPI_MEMCPY (LocalRSDP.Signature, ACPI_SIG_RSDP, 8);
ACPI_MEMCPY (LocalRSDP.OemId, "I_TEST", 6);
LocalRSDP.Revision = 2;
LocalRSDP.XsdtPhysicalAddress = ACPI_PTR_TO_PHYSADDR (LocalXSDT);
LocalRSDP.Length = sizeof (ACPI_TABLE_XSDT);
/* Set checksums for both XSDT and RSDP */
LocalXSDT->Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) LocalXSDT, LocalXSDT->Header.Length);
LocalRSDP.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalRSDP, ACPI_RSDP_CHECKSUM_LENGTH);
if (!DsdtAddress)
{
/* Use the local DSDT because incoming table(s) are all SSDT(s) */
DsdtAddress = ACPI_PTR_TO_PHYSADDR (LocalDsdtCode);
DsdtToInstallOverride = ACPI_CAST_PTR (ACPI_TABLE_HEADER, LocalDsdtCode);
}
if (ExternalFadt)
{
/*
* Use the external FADT, but we must update the DSDT/FACS addresses
* as well as the checksum
*/
ExternalFadt->Dsdt = DsdtAddress;
if (!AcpiGbl_ReducedHardware)
{
ExternalFadt->Facs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
}
if (ExternalFadt->Header.Length > ACPI_PTR_DIFF (&ExternalFadt->XDsdt, ExternalFadt))
{
ExternalFadt->XDsdt = DsdtAddress;
if (!AcpiGbl_ReducedHardware)
{
ExternalFadt->XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
}
}
/* Complete the FADT with the checksum */
ExternalFadt->Header.Checksum = 0;
ExternalFadt->Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) ExternalFadt, ExternalFadt->Header.Length);
}
else if (AcpiGbl_UseHwReducedFadt)
{
ACPI_MEMCPY (&LocalFADT, HwReducedFadtCode, sizeof (ACPI_TABLE_FADT));
LocalFADT.Dsdt = DsdtAddress;
LocalFADT.XDsdt = DsdtAddress;
LocalFADT.Header.Checksum = 0;
LocalFADT.Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalFADT, LocalFADT.Header.Length);
}
else
{
/*
* Build a local FADT so we can test the hardware/event init
*/
ACPI_MEMSET (&LocalFADT, 0, sizeof (ACPI_TABLE_FADT));
ACPI_STRNCPY (LocalFADT.Header.Signature, ACPI_SIG_FADT, 4);
/* Setup FADT header and DSDT/FACS addresses */
LocalFADT.Dsdt = 0;
LocalFADT.Facs = 0;
LocalFADT.XDsdt = DsdtAddress;
LocalFADT.XFacs = ACPI_PTR_TO_PHYSADDR (&LocalFACS);
LocalFADT.Header.Revision = 3;
LocalFADT.Header.Length = sizeof (ACPI_TABLE_FADT);
/* Miscellaneous FADT fields */
LocalFADT.Gpe0BlockLength = 16;
LocalFADT.Gpe0Block = 0x00001234;
LocalFADT.Gpe1BlockLength = 6;
LocalFADT.Gpe1Block = 0x00005678;
LocalFADT.Gpe1Base = 96;
LocalFADT.Pm1EventLength = 4;
LocalFADT.Pm1aEventBlock = 0x00001aaa;
LocalFADT.Pm1bEventBlock = 0x00001bbb;
LocalFADT.Pm1ControlLength = 2;
LocalFADT.Pm1aControlBlock = 0xB0;
LocalFADT.PmTimerLength = 4;
LocalFADT.PmTimerBlock = 0xA0;
LocalFADT.Pm2ControlBlock = 0xC0;
LocalFADT.Pm2ControlLength = 1;
/* Setup one example X-64 field */
LocalFADT.XPm1bEventBlock.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
LocalFADT.XPm1bEventBlock.Address = LocalFADT.Pm1bEventBlock;
LocalFADT.XPm1bEventBlock.BitWidth = (UINT8) ACPI_MUL_8 (LocalFADT.Pm1EventLength);
/* Complete the FADT with the checksum */
LocalFADT.Header.Checksum = 0;
LocalFADT.Header.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalFADT, LocalFADT.Header.Length);
}
/* Build a FACS */
ACPI_MEMSET (&LocalFACS, 0, sizeof (ACPI_TABLE_FACS));
ACPI_STRNCPY (LocalFACS.Signature, ACPI_SIG_FACS, 4);
LocalFACS.Length = sizeof (ACPI_TABLE_FACS);
LocalFACS.GlobalLock = 0x11AA0011;
/*
* Build a fake table [TEST] so that we make sure that the
* ACPICA core ignores it
*/
ACPI_MEMSET (&LocalTEST, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_STRNCPY (LocalTEST.Signature, "TEST", 4);
LocalTEST.Revision = 1;
LocalTEST.Length = sizeof (ACPI_TABLE_HEADER);
LocalTEST.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalTEST, LocalTEST.Length);
/*
* Build a fake table with a bad signature [BAD!] so that we make
* sure that the ACPICA core ignores it
*/
ACPI_MEMSET (&LocalBADTABLE, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_STRNCPY (LocalBADTABLE.Signature, "BAD!", 4);
LocalBADTABLE.Revision = 1;
LocalBADTABLE.Length = sizeof (ACPI_TABLE_HEADER);
LocalBADTABLE.Checksum = (UINT8) -AcpiTbChecksum (
(void *) &LocalBADTABLE, LocalBADTABLE.Length);
return (AE_OK);
}