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); }