Hi, I am new to ACPICA community. We are planning to use ACPICA API’s in one of power management application to get ACPI Processor block information from dsdt file in Linux server. I am planning to use ACPICA libraries to read ACPI Processor block information from Linux application. Information like: processor supported P-states and power usage of p states

We wrote small application to initialize ACPI tables but it’s failing and saw below error: //////////////////// ACPI Exception: AE_NOT_FOUND, While initializing Table Manager (20091214/examples-247) ACPI example examples-0206 [00] main : Example Debug output ACPI: ACPICA example info message ACPI Warning: ACPICA example warning message (20091214/examples-211) ACPI Error: ACPICA example error message (20091214/examples-212) ACPI Exception: AE_AML_OPERAND_TYPE, Example exception message (20091214/examples-213) ACPI: Executing OSI method ACPI: _OSI returned FFFFFFFF /////////////////////////////////////////// Can anyone guide me how to read processor information block dsdt file with ACPICA code? --Chittari The information contained in this message may be confidential and proprietary to American Megatrends, Inc. This communication is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any distribution of this message, in any form, is strictly prohibited. Please promptly notify the sender by reply e-mail or by telephone at 770-246-8600, and then delete or destroy all copies of the transmission.

-----Original Message----- From: devel-bounces(a)acpica.org [mailto:[email protected]] On Behalf Of chittaraiah pabba Sent: Monday, February 01, 2010 6:59 AM To: Lin, Ming M Cc: devel(a)acpica.org Subject: Re: [Devel] How to read ACPI table from Linux application Lin, Thanks for quick reply. It's true that ACPICA API are used in driver code but I saw the utility called "acpixtract" tool in acpi tools directory. I think this tool xtract system ACPI tables from dsdt file then users can read the ACPI tables and object information from extracted dsdt.dsl file.

Here is my requirements: 1) Every system has dsdt file in /proc/acpi/ folder 2) I can convert dsdt file from binary format to ASCII format with iasl compiler 3) Now I have dsdt.dsl file to read ACPI tables and objects in human readable format. Now onwards I need your help 4) I Know ACPIxtract tool also have input argument of dsdt file to extract the ACPI tables 5) Similar way I want use ACPI code to walk through the dsdt.dsl file and return processor block/object information from dsdt.file

Here is the processor block object and highlighted fields I like to read from dsdt.dsl file. Scope (_PR) { OperationRegion (SSDT, SystemMemory, 0x7F3EBC10, 0x02CC) Name (DCOR, 0x01) Name (NCST, 0x01) Name (NPSS, 0x02) Name (HNDL, 0x80000000) Name (CINT, Zero) Name (APSS, Package (0x02) { Package (0x06) { 0x0898, 0x00006978, 0x000A, 0x000A, 0x0B2A, 0x0B2A }, Package (0x06) { 0x04B0, 0x000035E8, 0x000A, 0x000A, 0x061D, 0x061D } }) I am more interest to read APSS package information of P states like processor supported P states and there usage of maximum power of in respected P states for power management of Legacy servers.

From APSS, it looks like there are 2 performance states supported.

I didn't see any power usage of processor in following folder: /sys/devices/system/cpu/cpu0/cpufreq/*. I really appreciate your service and valuable suggestions. Let me know if you need any further information to understand the problem. Please help me to read the processor block object from dsdt.dsl file. --Chittari -----Original Message----- From: Lin Ming [mailto:[email protected]] Sent: Sunday, January 31, 2010 9:33 PM To: chittaraiah pabba Cc: devel(a)acpica.org Subject: Re: [Devel] How to read ACPI table from Linux application On Sat, 2010-01-30 at 05:31 +0800, chittaraiah pabba wrote: > Hi, > > I am new to ACPICA community. We are planning to use ACPICA API's in > one of power management application to get ACPI Processor block > information from dsdt file in Linux server. > > I am planning to use ACPICA libraries to read ACPI Processor block > information from Linux application. Information like: processor > supported P-states and power usage of p states Hi, ACPICA API is used in driver code. You can't use it in userspace application to get hardware dependent info. Instead, see /sys/devices/system/cpu/cpu0/cpufreq/* for the info. Lin Ming > > We wrote small application to initialize ACPI tables but it's failing > and saw below error: > > //////////////////// > > ACPI Exception: AE_NOT_FOUND, While initializing Table Manager > (20091214/examples-247) > > ACPI example > > examples-0206 [00] main : Example Debug output > > ACPI: ACPICA example info message > > ACPI Warning: ACPICA example warning message (20091214/examples-211) > > ACPI Error: ACPICA example error message (20091214/examples-212) > > ACPI Exception: AE_AML_OPERAND_TYPE, Example exception message > (20091214/examples-213) > > ACPI: Executing OSI method > > ACPI: _OSI returned FFFFFFFF > > /////////////////////////////////////////// > > Can anyone guide me how to read processor information block dsdt file > with ACPICA code? > > --Chittari > > The information contained in this message may be confidential and > proprietary to American Megatrends, Inc. This communication is > intended to be read only by the individual or entity to whom it is > addressed or by their designee. If the reader of this message is not > the intended recipient, you are on notice that any distribution of > this message, in any form, is strictly prohibited. Please promptly > notify the sender by reply e-mail or by telephone at 770-246-8600, and > then delete or destroy all copies of the transmission. > _______________________________________________ Devel mailing list Devel(a)acpica.org http://lists.acpica.org/listinfo/devel