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tune: README: Whitespace cleanup

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Before making content changes, cleanup the various whitespace errors in
this file. Mostly end-of-line whitepsace.

(From OE-Core rev: 112e291c14ce4c3b8d074b71e63500dce609784e)

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Paul Eggleton <paul.eggleton@intel.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Nitin Kamble <nitin.a.kamble@intel.com>
Cc: Mark Hatle <mark.hatle@windriver.com>
Cc: Bruce Ashfield <bruce.ashfield@windriver.com>
Cc: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Darren Hart
2014-01-17 22:26:21 +00:00
committed by Richard Purdie
parent beac8c5ac2
commit e010be1367
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@@ -1,27 +1,27 @@
2012/03/30 - Mark Hatle <mark.hatle@windriver.com> 2012/03/30 - Mark Hatle <mark.hatle@windriver.com>
- Initial Revision - Initial Revision
The individual CPU, and ABI tunings are contained in this directory. A The individual CPU, and ABI tunings are contained in this directory. A
number of local and global variables are used to control the way the number of local and global variables are used to control the way the
tunings are setup and how they work together to specify an optimized tunings are setup and how they work together to specify an optimized
configuration. configuration.
The following is brief summary of the generic components that are used The following is brief summary of the generic components that are used
in these tunings. in these tunings.
AVAILTUNES - This is a list of all of the tuning definitions currently AVAILTUNES - This is a list of all of the tuning definitions currently
available in the system. Not all tunes in this list may be compatible available in the system. Not all tunes in this list may be compatible
with the machine configuration, or each other in a multilib with the machine configuration, or each other in a multilib
configuration. Each tuning file can add to this list using "+=", but configuration. Each tuning file can add to this list using "+=", but
should never replace the list using "=". should never replace the list using "=".
DEFAULTTUNE - This specifies the tune to use for a particular build. DEFAULTTUNE - This specifies the tune to use for a particular build.
Each tune should specify a reasonable default, which can be overriden by Each tune should specify a reasonable default, which can be overriden by
a machine or multilib configuration. The specified tune must be listed a machine or multilib configuration. The specified tune must be listed
in the AVAILTUNES. in the AVAILTUNES.
TUNEVALID[feature] - The <feature> is defined with a human readable TUNEVALID[feature] - The <feature> is defined with a human readable
explanation for what it does. All architectural, cpu, abi, etc tuning explanation for what it does. All architectural, cpu, abi, etc tuning
features must be defined using TUNEVALID. features must be defined using TUNEVALID.
TUNECONFLICTS[feature] - A list of features which conflict with <feature>. TUNECONFLICTS[feature] - A list of features which conflict with <feature>.
@@ -31,51 +31,51 @@ tuning ends up with features which conflict with each other.
TUNE_FEATURES - This is automatically defined as TUNE_FEATURES_tune-<tune>. TUNE_FEATURES - This is automatically defined as TUNE_FEATURES_tune-<tune>.
See TUNE_FEATURES_tune-<tune> for more information. See TUNE_FEATURES_tune-<tune> for more information.
TUNE_FEATURES_tune-<tune> - Specify the features used to describe a TUNE_FEATURES_tune-<tune> - Specify the features used to describe a
specific tune. This is a list of features that a tune support, each specific tune. This is a list of features that a tune support, each
feature must be in the TUNEVALID list. Note: the tune and a given feature must be in the TUNEVALID list. Note: the tune and a given
feature name may be the same, but they have different purposes. Only feature name may be the same, but they have different purposes. Only
features may be used to change behavior, while tunes are used to features may be used to change behavior, while tunes are used to
describe an overall set of features. describe an overall set of features.
ABIEXTENSION - An ABI extension may be specified by a specific feature ABIEXTENSION - An ABI extension may be specified by a specific feature
or other tuning setting, such as TARGET_FPU. Any ABI extensions either or other tuning setting, such as TARGET_FPU. Any ABI extensions either
need to be defined in the architectures base arch file, i.e. need to be defined in the architectures base arch file, i.e.
ABIEXTENSION = "eabi" in the arm case, or appended to in specific tune ABIEXTENSION = "eabi" in the arm case, or appended to in specific tune
files with a ".=". Spaces are not allowed in this variable. files with a ".=". Spaces are not allowed in this variable.
TUNE_CCARGS - Setup the cflags based on the TUNE_FEATURES settings. TUNE_CCARGS - Setup the cflags based on the TUNE_FEATURES settings.
These should be additive when defined using "+=". All items in this These should be additive when defined using "+=". All items in this
list should be dynamic! i.e. list should be dynamic! i.e.
${@bb.utils.contains("TUNE_FEATURES", "feature", "cflag", "!cflag", d)} ${@bb.utils.contains("TUNE_FEATURES", "feature", "cflag", "!cflag", d)}
TUNE_ARCH - The GNU canonical arch for a specific architecture. i.e. TUNE_ARCH - The GNU canonical arch for a specific architecture. i.e.
arm, armeb, mips, mips64, etc. This value is by bitbake to setup arm, armeb, mips, mips64, etc. This value is by bitbake to setup
configure. TUNE_ARCH definitions are specific to a given architecture. configure. TUNE_ARCH definitions are specific to a given architecture.
They may be a single static definitions, or may be dynamically adjusted. They may be a single static definitions, or may be dynamically adjusted.
See each architectures README for details for that CPU family. See each architectures README for details for that CPU family.
TUNE_PKGARCH - The package architecture used by the packaging systems to TUNE_PKGARCH - The package architecture used by the packaging systems to
define the architecture, abi and tuning of a particular package. define the architecture, abi and tuning of a particular package.
Similarly to TUNE_ARCH, the definition of TUNE_PKGARCH is specific to Similarly to TUNE_ARCH, the definition of TUNE_PKGARCH is specific to
each architecture. See each architectures README for details for that each architecture. See each architectures README for details for that
CPU family. CPU family.
PACKAGE_EXTRA_ARCHS - Lists all runtime compatible package PACKAGE_EXTRA_ARCHS - Lists all runtime compatible package
architectures. By default this is equal to architectures. By default this is equal to
PACKAGE_EXTRA_ARCHS_tune-<tune>. If an architecture deviates from the PACKAGE_EXTRA_ARCHS_tune-<tune>. If an architecture deviates from the
default it will be listed in the architecture README. default it will be listed in the architecture README.
PACKAGE_EXTRA_ARCHS_tune-<tune> - List all of the package architectures PACKAGE_EXTRA_ARCHS_tune-<tune> - List all of the package architectures
that are compatible with this specific tune. The package arch of this that are compatible with this specific tune. The package arch of this
tune must be in the list. tune must be in the list.
TARGET_FPU - The FPU setting for a given tune, hard (generate floating TARGET_FPU - The FPU setting for a given tune, hard (generate floating
point instructions), soft (generate internal gcc calls), "other" point instructions), soft (generate internal gcc calls), "other"
architecture specific floating point. This is synchronized with the architecture specific floating point. This is synchronized with the
compiler and other toolchain items. This should be dynamically compiler and other toolchain items. This should be dynamically
configured in the same way that TUNE_CCARGS is. configured in the same way that TUNE_CCARGS is.
BASE_LIB_tune-<tune> - The "/lib" location for a specific ABI. This is BASE_LIB_tune-<tune> - The "/lib" location for a specific ABI. This is
used in a multilib configuration to place the libraries in the correct, used in a multilib configuration to place the libraries in the correct,
non-conflicting locations. non-conflicting locations.