ACPI_STATUS
AcpiGetTimerDuration (
UINT32 StartTicks,
UINT32 EndTicks,
UINT32 *TimeElapsed)
{
ACPI_STATUS Status;
UINT32 DeltaTicks;
UINT64 Quotient;
ACPI_FUNCTION_TRACE (AcpiGetTimerDuration);
if (!TimeElapsed)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Compute Tick Delta:
* Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
*/
if (StartTicks < EndTicks)
{
DeltaTicks = EndTicks - StartTicks;
}
else if (StartTicks > EndTicks)
{
if ((AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
{
/* 24-bit Timer */
DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF);
}
else
{
/* 32-bit Timer */
DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks;
}
}
else /* StartTicks == EndTicks */
{
*TimeElapsed = 0;
return_ACPI_STATUS (AE_OK);
}
/*
* Compute Duration (Requires a 64-bit multiply and divide):
*
* TimeElapsed (microseconds) =
* (DeltaTicks * ACPI_USEC_PER_SEC) / ACPI_PM_TIMER_FREQUENCY;
*/
Status = AcpiUtShortDivide (((UINT64) DeltaTicks) * ACPI_USEC_PER_SEC,
ACPI_PM_TIMER_FREQUENCY, &Quotient, NULL);
*TimeElapsed = (UINT32) Quotient;
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiExOpcode_1A_1T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
UINT32 Temp32;
UINT32 i;
UINT64 PowerOfTen;
UINT64 Digit;
ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R,
AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the AML opcode */
switch (WalkState->Opcode)
{
case AML_BIT_NOT_OP:
case AML_FIND_SET_LEFT_BIT_OP:
case AML_FIND_SET_RIGHT_BIT_OP:
case AML_FROM_BCD_OP:
case AML_TO_BCD_OP:
case AML_COND_REF_OF_OP:
/* Create a return object of type Integer for these opcodes */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
switch (WalkState->Opcode)
{
case AML_BIT_NOT_OP: /* Not (Operand, Result) */
ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
break;
case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */
ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
/*
* Acpi specification describes Integer type as a little
* endian unsigned value, so this boundary condition is valid.
*/
for (Temp32 = 0; ReturnDesc->Integer.Value &&
Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
{
ReturnDesc->Integer.Value >>= 1;
}
ReturnDesc->Integer.Value = Temp32;
break;
case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
/*
* The Acpi specification describes Integer type as a little
* endian unsigned value, so this boundary condition is valid.
*/
for (Temp32 = 0; ReturnDesc->Integer.Value &&
Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
{
ReturnDesc->Integer.Value <<= 1;
}
/* Since the bit position is one-based, subtract from 33 (65) */
ReturnDesc->Integer.Value =
Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
break;
case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */
/*
* The 64-bit ACPI integer can hold 16 4-bit BCD characters
* (if table is 32-bit, integer can hold 8 BCD characters)
* Convert each 4-bit BCD value
*/
PowerOfTen = 1;
ReturnDesc->Integer.Value = 0;
Digit = Operand[0]->Integer.Value;
/* Convert each BCD digit (each is one nybble wide) */
for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
{
/* Get the least significant 4-bit BCD digit */
Temp32 = ((UINT32) Digit) & 0xF;
/* Check the range of the digit */
if (Temp32 > 9)
{
ACPI_ERROR ((AE_INFO,
"BCD digit too large (not decimal): 0x%X",
Temp32));
Status = AE_AML_NUMERIC_OVERFLOW;
goto Cleanup;
}
/* Sum the digit into the result with the current power of 10 */
ReturnDesc->Integer.Value +=
(((UINT64) Temp32) * PowerOfTen);
/* Shift to next BCD digit */
Digit >>= 4;
/* Next power of 10 */
PowerOfTen *= 10;
}
break;
case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */
ReturnDesc->Integer.Value = 0;
Digit = Operand[0]->Integer.Value;
/* Each BCD digit is one nybble wide */
for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
{
(void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32);
/*
* Insert the BCD digit that resides in the
* remainder from above
*/
ReturnDesc->Integer.Value |=
(((UINT64) Temp32) << ACPI_MUL_4 (i));
}
/* Overflow if there is any data left in Digit */
if (Digit > 0)
{
ACPI_ERROR ((AE_INFO,
"Integer too large to convert to BCD: 0x%8.8X%8.8X",
ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
Status = AE_AML_NUMERIC_OVERFLOW;
goto Cleanup;
}
break;
case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */
/*
* This op is a little strange because the internal return value is
* different than the return value stored in the result descriptor
* (There are really two return values)
*/
if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
{
/*
* This means that the object does not exist in the namespace,
* return FALSE
*/
ReturnDesc->Integer.Value = 0;
goto Cleanup;
}
/* Get the object reference, store it, and remove our reference */
Status = AcpiExGetObjectReference (Operand[0],
&ReturnDesc2, WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
AcpiUtRemoveReference (ReturnDesc2);
/* The object exists in the namespace, return TRUE */
ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
goto Cleanup;
default:
/* No other opcodes get here */
break;
}
break;
case AML_STORE_OP: /* Store (Source, Target) */
/*
* A store operand is typically a number, string, buffer or lvalue
* Be careful about deleting the source object,
* since the object itself may have been stored.
*/
Status = AcpiExStore (Operand[0], Operand[1], WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* It is possible that the Store already produced a return object */
if (!WalkState->ResultObj)
{
/*
* Normally, we would remove a reference on the Operand[0]
* parameter; But since it is being used as the internal return
* object (meaning we would normally increment it), the two
* cancel out, and we simply don't do anything.
*/
WalkState->ResultObj = Operand[0];
WalkState->Operands[0] = NULL; /* Prevent deletion */
}
return_ACPI_STATUS (Status);
/*
* ACPI 2.0 Opcodes
*/
case AML_COPY_OP: /* Copy (Source, Target) */
Status = AcpiUtCopyIobjectToIobject (
Operand[0], &ReturnDesc, WalkState);
break;
case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
Status = AcpiExConvertToString (
Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL);
if (ReturnDesc == Operand[0])
{
/* No conversion performed, add ref to handle return value */
AcpiUtAddReference (ReturnDesc);
}
break;
case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
Status = AcpiExConvertToString (
Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX);
if (ReturnDesc == Operand[0])
{
/* No conversion performed, add ref to handle return value */
AcpiUtAddReference (ReturnDesc);
}
break;
case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */
Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc);
if (ReturnDesc == Operand[0])
{
/* No conversion performed, add ref to handle return value */
AcpiUtAddReference (ReturnDesc);
}
break;
case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
/* Perform "explicit" conversion */
Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 0);
if (ReturnDesc == Operand[0])
{
/* No conversion performed, add ref to handle return value */
AcpiUtAddReference (ReturnDesc);
}
break;
case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
/* These are two obsolete opcodes */
ACPI_ERROR ((AE_INFO,
"%s is obsolete and not implemented",
AcpiPsGetOpcodeName (WalkState->Opcode)));
Status = AE_SUPPORT;
goto Cleanup;
default: /* Unknown opcode */
ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
if (ACPI_SUCCESS (Status))
{
/* Store the return value computed above into the target object */
Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
}
Cleanup:
/* Delete return object on error */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ReturnDesc);
}
/* Save return object on success */
else if (!WalkState->ResultObj)
{
WalkState->ResultObj = ReturnDesc;
}
return_ACPI_STATUS (Status);
}
static UINT32
AcpiExConvertToAscii (
UINT64 Integer,
UINT16 Base,
UINT8 *String,
UINT8 DataWidth)
{
UINT64 Digit;
UINT32 i;
UINT32 j;
UINT32 k = 0;
UINT32 HexLength;
UINT32 DecimalLength;
UINT32 Remainder;
BOOLEAN SupressZeros;
ACPI_FUNCTION_ENTRY ();
switch (Base)
{
case 10:
/* Setup max length for the decimal number */
switch (DataWidth)
{
case 1:
DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
break;
case 4:
DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
break;
case 8:
default:
DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
break;
}
SupressZeros = TRUE; /* No leading zeros */
Remainder = 0;
for (i = DecimalLength; i > 0; i--)
{
/* Divide by nth factor of 10 */
Digit = Integer;
for (j = 0; j < i; j++)
{
(void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
}
/* Handle leading zeros */
if (Remainder != 0)
{
SupressZeros = FALSE;
}
if (!SupressZeros)
{
String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
k++;
}
}
break;
case 16:
/* HexLength: 2 ascii hex chars per data byte */
HexLength = ACPI_MUL_2 (DataWidth);
for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
{
/* Get one hex digit, most significant digits first */
String[k] = (UINT8) AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
k++;
}
break;
default:
return (0);
}
/*
* Since leading zeros are suppressed, we must check for the case where
* the integer equals 0
*
* Finally, null terminate the string and return the length
*/
if (!k)
{
String [0] = ACPI_ASCII_ZERO;
k = 1;
}
String [k] = 0;
return ((UINT32) k);
}
ACPI_STATUS
AcpiUtStrtoul64 (
char *String,
UINT32 Base,
UINT64 *RetInteger)
{
UINT32 ThisDigit = 0;
UINT64 ReturnValue = 0;
UINT64 Quotient;
UINT64 Dividend;
UINT32 ToIntegerOp = (Base == ACPI_ANY_BASE);
UINT32 Mode32 = (AcpiGbl_IntegerByteWidth == 4);
UINT8 ValidDigits = 0;
UINT8 SignOf0x = 0;
UINT8 Term = 0;
ACPI_FUNCTION_TRACE_STR (UtStroul64, String);
switch (Base)
{
case ACPI_ANY_BASE:
case 16:
break;
default:
/* Invalid Base */
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!String)
{
goto ErrorExit;
}
/* Skip over any white space in the buffer */
while ((*String) && (ACPI_IS_SPACE (*String) || *String == '\t'))
{
String++;
}
if (ToIntegerOp)
{
/*
* Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
* We need to determine if it is decimal or hexadecimal.
*/
if ((*String == '0') && (ACPI_TOLOWER (*(String + 1)) == 'x'))
{
SignOf0x = 1;
Base = 16;
/* Skip over the leading '0x' */
String += 2;
}
else
{
Base = 10;
}
}
/* Any string left? Check that '0x' is not followed by white space. */
if (!(*String) || ACPI_IS_SPACE (*String) || *String == '\t')
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
goto AllDone;
}
}
/*
* Perform a 32-bit or 64-bit conversion, depending upon the current
* execution mode of the interpreter
*/
Dividend = (Mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
/* Main loop: convert the string to a 32- or 64-bit integer */
while (*String)
{
if (ACPI_IS_DIGIT (*String))
{
/* Convert ASCII 0-9 to Decimal value */
ThisDigit = ((UINT8) *String) - '0';
}
else if (Base == 10)
{
/* Digit is out of range; possible in ToInteger case only */
Term = 1;
}
else
{
ThisDigit = (UINT8) ACPI_TOUPPER (*String);
if (ACPI_IS_XDIGIT ((char) ThisDigit))
{
/* Convert ASCII Hex char to value */
ThisDigit = ThisDigit - 'A' + 10;
}
else
{
Term = 1;
}
}
if (Term)
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
break;
}
}
else if ((ValidDigits == 0) && (ThisDigit == 0) && !SignOf0x)
{
/* Skip zeros */
String++;
continue;
}
ValidDigits++;
if (SignOf0x && ((ValidDigits > 16) || ((ValidDigits > 8) && Mode32)))
{
/*
* This is ToInteger operation case.
* No any restrictions for string-to-integer conversion,
* see ACPI spec.
*/
goto ErrorExit;
}
/* Divide the digit into the correct position */
(void) AcpiUtShortDivide ((Dividend - (UINT64) ThisDigit),
Base, &Quotient, NULL);
if (ReturnValue > Quotient)
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
break;
}
}
ReturnValue *= Base;
ReturnValue += ThisDigit;
String++;
}
/* All done, normal exit */
AllDone:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (ReturnValue)));
*RetInteger = ReturnValue;
return_ACPI_STATUS (AE_OK);
ErrorExit:
/* Base was set/validated above */
if (Base == 10)
{
return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT);
}
else
{
return_ACPI_STATUS (AE_BAD_HEX_CONSTANT);
}
}
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
void *LogicalAddrPtr = NULL;
ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
UINT32 Length;
ACPI_SIZE MapLength;
ACPI_SIZE PageBoundaryMapLength;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
UINT32 Remainder;
#endif
ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
/* Validate and translate the bit width */
switch (BitWidth)
{
case 8:
Length = 1;
break;
case 16:
Length = 2;
break;
case 32:
Length = 4;
break;
case 64:
Length = 8;
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
BitWidth));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
/*
* Hardware does not support non-aligned data transfers, we must verify
* the request.
*/
(void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
if (Remainder != 0)
{
return_ACPI_STATUS (AE_AML_ALIGNMENT);
}
#endif
/*
* Does the request fit into the cached memory mapping?
* Is 1) Address below the current mapping? OR
* 2) Address beyond the current mapping?
*/
if ((Address < MemInfo->MappedPhysicalAddress) ||
(((UINT64) Address + Length) >
((UINT64)
MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
{
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (MemInfo->MappedLength)
{
/* Valid mapping, delete it */
AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
MemInfo->MappedLength);
}
/*
* October 2009: Attempt to map from the requested address to the
* end of the region. However, we will never map more than one
* page, nor will we cross a page boundary.
*/
MapLength = (ACPI_SIZE)
((MemInfo->Address + MemInfo->Length) - Address);
/*
* If mapping the entire remaining portion of the region will cross
* a page boundary, just map up to the page boundary, do not cross.
* On some systems, crossing a page boundary while mapping regions
* can cause warnings if the pages have different attributes
* due to resource management.
*
* This has the added benefit of constraining a single mapping to
* one page, which is similar to the original code that used a 4k
* maximum window.
*/
PageBoundaryMapLength = (ACPI_SIZE)
(ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address);
if (PageBoundaryMapLength == 0)
{
PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
}
if (MapLength > PageBoundaryMapLength)
{
MapLength = PageBoundaryMapLength;
}
/* Create a new mapping starting at the address given */
MemInfo->MappedLogicalAddress = AcpiOsMapMemory (Address, MapLength);
if (!MemInfo->MappedLogicalAddress)
{
ACPI_ERROR ((AE_INFO,
"Could not map memory at 0x%8.8X%8.8X, size %u",
ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
MemInfo->MappedLength = 0;
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the physical address and mapping size */
MemInfo->MappedPhysicalAddress = Address;
MemInfo->MappedLength = MapLength;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
LogicalAddrPtr = MemInfo->MappedLogicalAddress +
((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
/*
* Perform the memory read or write
*
* Note: For machines that do not support non-aligned transfers, the target
* address was checked for alignment above. We do not attempt to break the
* transfer up into smaller (byte-size) chunks because the AML specifically
* asked for a transfer width that the hardware may require.
*/
switch (Function)
{
case ACPI_READ:
*Value = 0;
switch (BitWidth)
{
case 8:
*Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
break;
case 16:
*Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
break;
case 32:
*Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
break;
case 64:
*Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
break;
default:
/* BitWidth was already validated */
break;
}
break;
case ACPI_WRITE:
switch (BitWidth)
{
case 8:
ACPI_SET8 (LogicalAddrPtr, *Value);
break;
case 16:
ACPI_SET16 (LogicalAddrPtr, *Value);
break;
case 32:
ACPI_SET32 (LogicalAddrPtr, *Value);
break;
case 64:
ACPI_SET64 (LogicalAddrPtr, *Value);
break;
default:
/* BitWidth was already validated */
break;
}
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
ACPI_INTEGER *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
void *LogicalAddrPtr = NULL;
ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
UINT32 Length;
ACPI_SIZE WindowSize;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
UINT32 Remainder;
#endif
ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
/* Validate and translate the bit width */
switch (BitWidth)
{
case 8:
Length = 1;
break;
case 16:
Length = 2;
break;
case 32:
Length = 4;
break;
case 64:
Length = 8;
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %d",
BitWidth));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
/*
* Hardware does not support non-aligned data transfers, we must verify
* the request.
*/
(void) AcpiUtShortDivide ((ACPI_INTEGER) Address, Length, NULL, &Remainder);
if (Remainder != 0)
{
return_ACPI_STATUS (AE_AML_ALIGNMENT);
}
#endif
/*
* Does the request fit into the cached memory mapping?
* Is 1) Address below the current mapping? OR
* 2) Address beyond the current mapping?
*/
if ((Address < MemInfo->MappedPhysicalAddress) ||
(((ACPI_INTEGER) Address + Length) >
((ACPI_INTEGER)
MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
{
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (MemInfo->MappedLength)
{
/* Valid mapping, delete it */
AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
MemInfo->MappedLength);
}
/*
* Don't attempt to map memory beyond the end of the region, and
* constrain the maximum mapping size to something reasonable.
*/
WindowSize = (ACPI_SIZE)
((MemInfo->Address + MemInfo->Length) - Address);
if (WindowSize > ACPI_SYSMEM_REGION_WINDOW_SIZE)
{
WindowSize = ACPI_SYSMEM_REGION_WINDOW_SIZE;
}
/* Create a new mapping starting at the address given */
MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
(ACPI_PHYSICAL_ADDRESS) Address, WindowSize);
if (!MemInfo->MappedLogicalAddress)
{
ACPI_ERROR ((AE_INFO,
"Could not map memory at %8.8X%8.8X, size %X",
ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) WindowSize));
MemInfo->MappedLength = 0;
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the physical address and mapping size */
MemInfo->MappedPhysicalAddress = Address;
MemInfo->MappedLength = WindowSize;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
LogicalAddrPtr = MemInfo->MappedLogicalAddress +
((ACPI_INTEGER) Address - (ACPI_INTEGER) MemInfo->MappedPhysicalAddress);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
/*
* Perform the memory read or write
*
* Note: For machines that do not support non-aligned transfers, the target
* address was checked for alignment above. We do not attempt to break the
* transfer up into smaller (byte-size) chunks because the AML specifically
* asked for a transfer width that the hardware may require.
*/
switch (Function)
{
case ACPI_READ:
*Value = 0;
switch (BitWidth)
{
case 8:
*Value = (ACPI_INTEGER) ACPI_GET8 (LogicalAddrPtr);
break;
case 16:
*Value = (ACPI_INTEGER) ACPI_GET16 (LogicalAddrPtr);
break;
case 32:
*Value = (ACPI_INTEGER) ACPI_GET32 (LogicalAddrPtr);
break;
case 64:
*Value = (ACPI_INTEGER) ACPI_GET64 (LogicalAddrPtr);
break;
default:
/* BitWidth was already validated */
break;
}
break;
case ACPI_WRITE:
switch (BitWidth)
{
case 8:
ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;
break;
case 16:
ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;
break;
case 32:
ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;
break;
case 64:
ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;
break;
default:
/* BitWidth was already validated */
break;
}
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiGetTimerDuration (
UINT32 StartTicks,
UINT32 EndTicks,
UINT32 *TimeElapsed)
{
UINT32 DeltaTicks = 0;
UINT64_OVERLAY NormalizedTicks;
ACPI_STATUS Status;
ACPI_INTEGER OutQuotient;
ACPI_FUNCTION_TRACE ("AcpiGetTimerDuration");
if (!TimeElapsed)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Compute Tick Delta:
* -------------------
* Handle (max one) timer rollovers on 24- versus 32-bit timers.
*/
if (StartTicks < EndTicks)
{
DeltaTicks = EndTicks - StartTicks;
}
else if (StartTicks > EndTicks)
{
if (0 == AcpiGbl_FADT->TmrValExt)
{
/* 24-bit Timer */
DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF);
}
else
{
/* 32-bit Timer */
DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks;
}
}
else
{
*TimeElapsed = 0;
return_ACPI_STATUS (AE_OK);
}
/*
* Compute Duration:
* -----------------
*
* Requires a 64-bit divide:
*
* TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY;
*/
NormalizedTicks.Full = ((UINT64) DeltaTicks) * 1000000;
Status = AcpiUtShortDivide (&NormalizedTicks.Full, PM_TIMER_FREQUENCY,
&OutQuotient, NULL);
*TimeElapsed = (UINT32) OutQuotient;
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiUtStrtoul64 (
char *String,
UINT32 Base,
ACPI_INTEGER *RetInteger)
{
UINT32 Index;
ACPI_INTEGER ReturnValue = 0;
ACPI_STATUS Status = AE_OK;
ACPI_INTEGER Dividend;
ACPI_INTEGER Quotient;
*RetInteger = 0;
switch (Base)
{
case 0:
case 8:
case 10:
case 16:
break;
default:
/*
* The specified Base parameter is not in the domain of
* this function:
*/
return (AE_BAD_PARAMETER);
}
/*
* skip over any white space in the buffer:
*/
while (ACPI_IS_SPACE (*String) || *String == '\t')
{
++String;
}
/*
* If the input parameter Base is zero, then we need to
* determine if it is octal, decimal, or hexadecimal:
*/
if (Base == 0)
{
if (*String == '0')
{
if (ACPI_TOLOWER (*(++String)) == 'x')
{
Base = 16;
++String;
}
else
{
Base = 8;
}
}
else
{
Base = 10;
}
}
/*
* For octal and hexadecimal bases, skip over the leading
* 0 or 0x, if they are present.
*/
if (Base == 8 && *String == '0')
{
String++;
}
if (Base == 16 &&
*String == '0' &&
ACPI_TOLOWER (*(++String)) == 'x')
{
String++;
}
/* Main loop: convert the string to an unsigned long */
while (*String)
{
if (ACPI_IS_DIGIT (*String))
{
Index = ((UINT8) *String) - '0';
}
else
{
Index = (UINT8) ACPI_TOUPPER (*String);
if (ACPI_IS_UPPER ((char) Index))
{
Index = Index - 'A' + 10;
}
else
{
goto ErrorExit;
}
}
if (Index >= Base)
{
goto ErrorExit;
}
/* Check to see if value is out of range: */
Dividend = ACPI_INTEGER_MAX - (ACPI_INTEGER) Index;
(void) AcpiUtShortDivide (&Dividend, Base, &Quotient, NULL);
if (ReturnValue > Quotient)
{
goto ErrorExit;
}
ReturnValue *= Base;
ReturnValue += Index;
++String;
}
*RetInteger = ReturnValue;
return (Status);
ErrorExit:
switch (Base)
{
case 8:
Status = AE_BAD_OCTAL_CONSTANT;
break;
case 10:
Status = AE_BAD_DECIMAL_CONSTANT;
break;
case 16:
Status = AE_BAD_HEX_CONSTANT;
break;
default:
/* Base validated above */
break;
}
return (Status);
}
