| 2012/03/30 - Mark Hatle <mark.hatle@windriver.com> |
| - Initial Revision |
| |
| The ARM architecture definitions are split among a number of files. |
| The primary definitions for the variables are handled by the core |
| arch-arm.inc file. |
| |
| TUNE_ARCH is set to either "arm" or "armeb" depending on the value |
| of the existence of the "bigendian" feature in a given tune. |
| |
| A small set of ARM specific variables have been defined to allow |
| TUNE_PKGARCH to be automatically defined. Optimized tunings must NOT |
| change the definiton of TUNE_PKGARCH. TUNE_PKGACH:tune-<tune> will be |
| ignored. The format of the package arch is enforced by the TUNE_PKGARCH |
| default. The format must be of the form: |
| <armversion>[t][e][hf][b][-vfp][-neon] |
| |
| TUNE_PKGARCH is defined as: |
| ${ARMPKGARCH}${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}${ARMPKGSFX_EABI}${ARMPKGSFX_ENDIAN}${ARMPKGSFX_FPU} |
| |
| ARMPKGARCH - This is the core package arch component specified by each |
| tuning. This is the primary identifier of a tuning. Usual values are: |
| arm, armv4, armv5, armv6, armv7a, etc. |
| |
| ARMPKGSFX_THUMB - This is the thumb specific suffix. Curently it is |
| defined in feature-arm-thumb.inc. |
| |
| ARMPKGSFX_DSP - This is the DSP specific suffix. Currently this is set |
| to 'e' when on armv5 and the dsp feature is enabled. |
| |
| ARMPKGSFX_EABI - This is the eabi specific suffix. There are currently |
| two defined ABIs specificed, standard EABI and Hard Float (VFP) EABI. |
| When the callconvention-hard is enabled, "hf" is specified, otherwise it |
| is blank. |
| |
| ARMPKGSFX_ENDIAN - This is the endian specific suffix. It is defined in |
| the core arch-arm.inc file. |
| |
| ARMPKGSFX_FPU - This is the FPU specific suffix. The suffix indicates |
| specific FPU optimizations. 'vfp' and 'neon' are both defined. |