mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 06:55:07 +07:00
5ebd2eaaef
ACPICA commit e2e72a351201fd58e4694418859ae2c247dafca0 Consolidate multiple versions of strtoul64 to one common version. limit possible bases to either 10 or 16. Handles both implicit and explicit conversions. Added a 2-character ascii-to-hex function for GPEs and buffers. Adds a new file, utstrtoul64.c Link: https://github.com/acpica/acpica/commit/e2e72a35 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
349 lines
11 KiB
C
349 lines
11 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: utstrtoul64 - string to 64-bit integer support
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2016, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* The functions in this module satisfy the need for 64-bit string-to-integer
|
|
* conversions on both 32-bit and 64-bit platforms.
|
|
*
|
|
******************************************************************************/
|
|
|
|
#define _COMPONENT ACPI_UTILITIES
|
|
ACPI_MODULE_NAME("utstrtoul64")
|
|
|
|
/* Local prototypes */
|
|
static u64 acpi_ut_strtoul_base10(char *string, u32 flags);
|
|
|
|
static u64 acpi_ut_strtoul_base16(char *string, u32 flags);
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* String conversion rules as written in the ACPI specification. The error
|
|
* conditions and behavior are different depending on the type of conversion.
|
|
*
|
|
*
|
|
* Implicit data type conversion: string-to-integer
|
|
* --------------------------------------------------
|
|
*
|
|
* Base is always 16. This is the ACPI_STRTOUL_BASE16 case.
|
|
*
|
|
* Example:
|
|
* Add ("BA98", Arg0, Local0)
|
|
*
|
|
* The integer is initialized to the value zero.
|
|
* The ASCII string is interpreted as a hexadecimal constant.
|
|
*
|
|
* 1) A "0x" prefix is not allowed. However, ACPICA allows this for
|
|
* compatibility with previous ACPICA. (NO ERROR)
|
|
*
|
|
* 2) Terminates when the size of an integer is reached (32 or 64 bits).
|
|
* (NO ERROR)
|
|
*
|
|
* 3) The first non-hex character terminates the conversion without error.
|
|
* (NO ERROR)
|
|
*
|
|
* 4) Conversion of a null (zero-length) string to an integer is not
|
|
* allowed. However, ACPICA allows this for compatibility with previous
|
|
* ACPICA. This conversion returns the value 0. (NO ERROR)
|
|
*
|
|
*
|
|
* Explicit data type conversion: to_integer() with string operand
|
|
* ---------------------------------------------------------------
|
|
*
|
|
* Base is either 10 (default) or 16 (with 0x prefix)
|
|
*
|
|
* Examples:
|
|
* to_integer ("1000")
|
|
* to_integer ("0xABCD")
|
|
*
|
|
* 1) Can be (must be) either a decimal or hexadecimal numeric string.
|
|
* A hex value must be prefixed by "0x" or it is interpreted as a decimal.
|
|
*
|
|
* 2) The value must not exceed the maximum of an integer value. ACPI spec
|
|
* states the behavior is "unpredictable", so ACPICA matches the behavior
|
|
* of the implicit conversion case.(NO ERROR)
|
|
*
|
|
* 3) Behavior on the first non-hex character is not specified by the ACPI
|
|
* spec, so ACPICA matches the behavior of the implicit conversion case
|
|
* and terminates. (NO ERROR)
|
|
*
|
|
* 4) A null (zero-length) string is illegal.
|
|
* However, ACPICA allows this for compatibility with previous ACPICA.
|
|
* This conversion returns the value 0. (NO ERROR)
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_strtoul64
|
|
*
|
|
* PARAMETERS: string - Null terminated input string
|
|
* flags - Conversion info, see below
|
|
* return_value - Where the converted integer is
|
|
* returned
|
|
*
|
|
* RETURN: Status and Converted value
|
|
*
|
|
* DESCRIPTION: Convert a string into an unsigned value. Performs either a
|
|
* 32-bit or 64-bit conversion, depending on the input integer
|
|
* size in Flags (often the current mode of the interpreter).
|
|
*
|
|
* Values for Flags:
|
|
* ACPI_STRTOUL_32BIT - Max integer value is 32 bits
|
|
* ACPI_STRTOUL_64BIT - Max integer value is 64 bits
|
|
* ACPI_STRTOUL_BASE16 - Input string is hexadecimal. Default
|
|
* is 10/16 based on string prefix (0x).
|
|
*
|
|
* NOTES:
|
|
* Negative numbers are not supported, as they are not supported by ACPI.
|
|
*
|
|
* Supports only base 16 or base 10 strings/values. Does not
|
|
* support Octal strings, as these are not supported by ACPI.
|
|
*
|
|
* Current users of this support:
|
|
*
|
|
* interpreter - Implicit and explicit conversions, GPE method names
|
|
* debugger - Command line input string conversion
|
|
* iASL - Main parser, conversion of constants to integers
|
|
* iASL - Data Table Compiler parser (constant math expressions)
|
|
* iASL - Preprocessor (constant math expressions)
|
|
* acpi_dump - Input table addresses
|
|
* acpi_exec - Testing of the acpi_ut_strtoul64 function
|
|
*
|
|
* Note concerning callers:
|
|
* acpi_gbl_integer_byte_width can be used to set the 32/64 limit. If used,
|
|
* this global should be set to the proper width. For the core ACPICA code,
|
|
* this width depends on the DSDT version. For iASL, the default byte
|
|
* width is always 8 for the parser, but error checking is performed later
|
|
* to flag cases where a 64-bit constant is defined in a 32-bit DSDT/SSDT.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ut_strtoul64(char *string, u32 flags, u64 *return_value)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
u32 base;
|
|
|
|
ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string);
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!string || !return_value) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
*return_value = 0;
|
|
|
|
/* Check for zero-length string, returns 0 */
|
|
|
|
if (*string == 0) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* Skip over any white space at start of string */
|
|
|
|
while (isspace((int)*string)) {
|
|
string++;
|
|
}
|
|
|
|
/* End of string? return 0 */
|
|
|
|
if (*string == 0) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*
|
|
* 1) The "0x" prefix indicates base 16. Per the ACPI specification,
|
|
* the "0x" prefix is only allowed for implicit (non-strict) conversions.
|
|
* However, we always allow it for compatibility with older ACPICA.
|
|
*/
|
|
if ((*string == ACPI_ASCII_ZERO) &&
|
|
(tolower((int)*(string + 1)) == 'x')) {
|
|
string += 2; /* Go past the 0x */
|
|
if (*string == 0) {
|
|
return_ACPI_STATUS(AE_OK); /* Return value 0 */
|
|
}
|
|
|
|
base = 16;
|
|
}
|
|
|
|
/* 2) Force to base 16 (implicit conversion case) */
|
|
|
|
else if (flags & ACPI_STRTOUL_BASE16) {
|
|
base = 16;
|
|
}
|
|
|
|
/* 3) Default fallback is to Base 10 */
|
|
|
|
else {
|
|
base = 10;
|
|
}
|
|
|
|
/* Skip all leading zeros */
|
|
|
|
while (*string == ACPI_ASCII_ZERO) {
|
|
string++;
|
|
if (*string == 0) {
|
|
return_ACPI_STATUS(AE_OK); /* Return value 0 */
|
|
}
|
|
}
|
|
|
|
/* Perform the base 16 or 10 conversion */
|
|
|
|
if (base == 16) {
|
|
*return_value = acpi_ut_strtoul_base16(string, flags);
|
|
} else {
|
|
*return_value = acpi_ut_strtoul_base10(string, flags);
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_strtoul_base10
|
|
*
|
|
* PARAMETERS: string - Null terminated input string
|
|
* flags - Conversion info
|
|
*
|
|
* RETURN: 64-bit converted integer
|
|
*
|
|
* DESCRIPTION: Performs a base 10 conversion of the input string to an
|
|
* integer value, either 32 or 64 bits.
|
|
* Note: String must be valid and non-null.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static u64 acpi_ut_strtoul_base10(char *string, u32 flags)
|
|
{
|
|
int ascii_digit;
|
|
u64 next_value;
|
|
u64 return_value = 0;
|
|
|
|
/* Main loop: convert each ASCII byte in the input string */
|
|
|
|
while (*string) {
|
|
ascii_digit = *string;
|
|
if (!isdigit(ascii_digit)) {
|
|
|
|
/* Not ASCII 0-9, terminate */
|
|
|
|
goto exit;
|
|
}
|
|
|
|
/* Convert and insert (add) the decimal digit */
|
|
|
|
next_value =
|
|
(return_value * 10) + (ascii_digit - ACPI_ASCII_ZERO);
|
|
|
|
/* Check for overflow (32 or 64 bit) - return current converted value */
|
|
|
|
if (((flags & ACPI_STRTOUL_32BIT) && (next_value > ACPI_UINT32_MAX)) || (next_value < return_value)) { /* 64-bit overflow case */
|
|
goto exit;
|
|
}
|
|
|
|
return_value = next_value;
|
|
string++;
|
|
}
|
|
|
|
exit:
|
|
return (return_value);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_strtoul_base16
|
|
*
|
|
* PARAMETERS: string - Null terminated input string
|
|
* flags - conversion info
|
|
*
|
|
* RETURN: 64-bit converted integer
|
|
*
|
|
* DESCRIPTION: Performs a base 16 conversion of the input string to an
|
|
* integer value, either 32 or 64 bits.
|
|
* Note: String must be valid and non-null.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static u64 acpi_ut_strtoul_base16(char *string, u32 flags)
|
|
{
|
|
int ascii_digit;
|
|
u32 valid_digits = 1;
|
|
u64 return_value = 0;
|
|
|
|
/* Main loop: convert each ASCII byte in the input string */
|
|
|
|
while (*string) {
|
|
|
|
/* Check for overflow (32 or 64 bit) - return current converted value */
|
|
|
|
if ((valid_digits > 16) ||
|
|
((valid_digits > 8) && (flags & ACPI_STRTOUL_32BIT))) {
|
|
goto exit;
|
|
}
|
|
|
|
ascii_digit = *string;
|
|
if (!isxdigit(ascii_digit)) {
|
|
|
|
/* Not Hex ASCII A-F, a-f, or 0-9, terminate */
|
|
|
|
goto exit;
|
|
}
|
|
|
|
/* Convert and insert the hex digit */
|
|
|
|
return_value =
|
|
(return_value << 4) |
|
|
acpi_ut_ascii_char_to_hex(ascii_digit);
|
|
|
|
string++;
|
|
valid_digits++;
|
|
}
|
|
|
|
exit:
|
|
return (return_value);
|
|
}
|