Dear Albert ARIBAUD, In message <4d3d2942.4060...@free.fr> you wrote: > > - get_timer() works in pure ticks, not ms, and thus does not need > multiply/divide; it may at most need to implement a carry over from 32 > bit to 64 bits *if* the HW counter is 32 bits *and if* we want a 64-bit > virtual counter. > - get_time() works in ms, and thus needs scale conversion, so possibly a > multiply/divide but possibly some other method, to convert a tick value > to an ms value.
No. There is get_ticks(), which operates on ticks, and there is get_timer(), which returns milliseconds. > That's where I come back to one point of my proposal: if we can get a > general framework for get_timer() to return a 64-bit free-running tick > value, then we might not need a ms-based get_time() at all, because we > could use get_timer() as well for ms timings, provided we can convert Then you will always have to use 64 bit variables for all related operations. Note that get_timer() returns "unsigned long"", which allows for smaller code in the majority of use cases. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Program maintenance is an entropy-increasing process, and even its most skilfull execution only delays the subsidence of the system into unfixable obsolescence. - Fred Brooks, "The Mythical Man Month" _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
