| Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | 2012/03/30 - Mark Hatle <mark.hatle@windriver.com> |
| 2 | - Initial Revision |
| 3 | |
| 4 | The ARM architecture definitions are split among a number of files. |
| 5 | The primary definitions for the variables are handled by the core |
| 6 | arch-arm.inc file. |
| 7 | |
| 8 | TUNE_ARCH is set to either "arm" or "armeb" depending on the value |
| 9 | of the existence of the "bigendian" feature in a given tune. |
| 10 | |
| 11 | A small set of ARM specific variables have been defined to allow |
| 12 | TUNE_PKGARCH to be automatically defined. Optimized tunings must NOT |
| 13 | change the definiton of TUNE_PKGARCH. TUNE_PKGACH_tune-<tune> will be |
| 14 | ignored. The format of the package arch is enforced by the TUNE_PKGARCH |
| 15 | default. The format must be of the form: |
| 16 | <armversion>[t][e][hf][b][-vfp][-neon] |
| 17 | |
| 18 | TUNE_PKGARCH is defined as: |
| 19 | ${ARMPKGARCH}${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}${ARMPKGSFX_EABI}${ARMPKGSFX_ENDIAN}${ARMPKGSFX_FPU} |
| 20 | |
| 21 | ARMPKGARCH - This is the core package arch component specified by each |
| 22 | tuning. This is the primary identifier of a tuning. Usual values are: |
| 23 | arm, armv4, armv5, armv6, armv7a, etc. |
| 24 | |
| 25 | ARMPKGSFX_THUMB - This is the thumb specific suffix. Curently it is |
| 26 | defined in feature-arm-thumb.inc. |
| 27 | |
| 28 | ARMPKGSFX_DSP - This is the DSP specific suffix. Currently this is set |
| 29 | to 'e' when on armv5 and the dsp feature is enabled. |
| 30 | |
| 31 | ARMPKGSFX_EABI - This is the eabi specific suffix. There are currently |
| 32 | two defined ABIs specificed, standard EABI and Hard Float (VFP) EABI. |
| 33 | When the callconvention-hard is enabled, "hf" is specified, otherwise it |
| 34 | is blank. |
| 35 | |
| 36 | ARMPKGSFX_ENDIAN - This is the endian specific suffix. It is defined in |
| 37 | the core arch-arm.inc file. |
| 38 | |
| 39 | ARMPKGSFX_FPU - This is the FPU specific suffix. The suffix indicates |
| 40 | specific FPU optimizations. 'vfp' and 'neon' are both defined. |