conf/machine/include: Cleanup IA tunings to match README

We perform a basic cleanup of the IA32 architecture and related
tunings in order to match the rules and descriptions within the
new tuning README file.

A number of small issues were corrected in the "c3" tuning to
bring it inline with the README.

(From OE-Core rev: ab77d3401908964f3249c761969600b5ec1bfbd0)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 38 insertions, 12 deletions

diff --git a/meta/conf/machine/include/ia32/README b/meta/conf/machine/include/ia32/README
new file mode 100644
index 0000000000..8f80a5ba94
--- /dev/null
+++ b/meta/conf/machine/include/ia32/README
@@ -0,0 +1,24 @@
+2012/03/30 - Mark Hatle <mark.hatle@windriver.com>
+ - Initial version
+
+Most of the items for the IA architecture are defined in the single 
+arch-ia32 file.
+
+Three ABIs are define, m32, mx32 and m64.
+
+The following is the list of ia32 specific variables:
+
+X86ARCH32 - This is the 32-bit architecture GNU canonical arch, TUNE_ARCH.
+
+X86ARCH64 - This is the 64-bit architecture GNU canonical arch, TUNE_ARCH.
+
+The TUNE_PKGARCH is defined as follows:
+
+TUNE_PKGARCH = ${TUNE_PKGARCH_tune-${DEFAULTTUNE}}
+
+The package architecture for 32-bit targets is historical and generally
+set to to match the core compatible processor type, i.e. i386.
+
+For 64-bit architectures, the architecture is expected to end in '_64'.
+
+If the x32 ABI is used, then the _64 is further extended with a '_x32'.
diff --git a/meta/conf/machine/include/ia32/arch-ia32.inc b/meta/conf/machine/include/ia32/arch-ia32.inc
index 0931c26520..a5dae8811b 100644
--- a/meta/conf/machine/include/ia32/arch-ia32.inc
+++ b/meta/conf/machine/include/ia32/arch-ia32.inc
@@ -7,6 +7,8 @@ TARGET_FPU ?= ""
 X86ARCH32 ?= "i586"
 X86ARCH64 ?= "x86_64"
 
+TUNE_PKGARCH = "${TUNE_PKGARCH_tune-${DEFAULTTUNE}}"
+
 # ELF32 ABI
 TUNEVALID[m32] = "IA32 ELF32 standard ABI"
 TUNECONFLICTS[m32] = "m64 mx32"
@@ -29,21 +31,21 @@ TUNECONFLICT[m64] = "m32 mx32"
 TUNE_ARCH .= "${@bb.utils.contains("TUNE_FEATURES", "m64", "${X86ARCH64}", "" ,d)}"
 TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "m64", "-m64", "", d)}"
 
-TUNE_PKGARCH ?= "${@bb.utils.contains("TUNE_FEATURES", "m32", "x86", "x86_64", d)}"
-
 # Default Tune configurations
 AVAILTUNES += "x86"
-TUNE_FEATURES_tune-x86 ?= "m32"
-BASE_LIB_tune-x86 ?= "lib"
-PACKAGE_EXTRA_ARCHS_tune-x86 = "x86"
+TUNE_FEATURES_tune-x86 = "m32"
+BASE_LIB_tune-x86 = "lib"
+TUNE_PKGARCH_tune-x86 = "x86"
+PACKAGE_EXTRA_ARCHS_tune-x86 = "${TUNE_PKGARCH_tune-x86}"
 
 AVAILTUNES += "x86-64"
-TUNE_FEATURES_tune-x86-64 ?= "m64"
-BASE_LIB_tune-x86-64 ?= "lib64"
-PACKAGE_EXTRA_ARCHS_tune-x86-64 = "x86_64"
+TUNE_FEATURES_tune-x86-64 = "m64"
+BASE_LIB_tune-x86-64 = "lib64"
+TUNE_PKGARCH_tune-x86-64 = "x86_64"
+PACKAGE_EXTRA_ARCHS_tune-x86-64 = "${TUNE_PKGARCH_tune-x86-64}"
 
 AVAILTUNES += "x86-64-x32"
-TUNE_FEATURES_tune-x86-64-x32 ?= "mx32"
-BASE_LIB_tune-x86-64-x32 ?= "libx32"
-PACKAGE_EXTRA_ARCHS_tune-x86-64-x32 = "x86_64_x32"
-TUNE_PKGARCH .= "${@bb.utils.contains("TUNE_FEATURES", "mx32", "_x32", "", d)}"
+TUNE_FEATURES_tune-x86-64-x32 = "mx32"
+BASE_LIB_tune-x86-64-x32 = "libx32"
+TUNE_PKGARCH_tune-x86-64-x32 = "x86_64_x32"
+PACKAGE_EXTRA_ARCHS_tune-x86-64-x32 = "${TUNE_PKGARCH_tune-x86-64-x32}"