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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. | ||