tm_basic fixes

[GONZALEZ Laurent]

hi list,

this patch removes an hardwired value to compute ns_per_system_clock variable and also restore the meaning of this variable (that should otherwise be renamed to us_per_system_clock). The test is now compliant with the definition of CYGNUM_HAL_RTC_NUMERATOR and CYGNUM_HAL_RTC_DENOMINATOR.

Moreover, it fixes the computation of clock interrupt cost. That's a good news for eCos because this cost is currently over-estimated.


-- 
GONZALEZ Laurent
------------------------------------
Software engineer
TRANGO Systems - Groupe ELSYS Design
74, avenue des Martyrs
38000 Grenoble
Tel: 33 (0)4 76 12 28 44
Fax: 33 (0)4 76 12 28 49
http://www.trango-systems.com
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