On 05/09/2013 11:22 PM, Svetoslav Neykov wrote: > Hi Marc, > > Marc Kleine-Budde [mailto:mkl@xxxxxxxxxxxxxx] (On Thursday, March 28, 2013 > 4:16 PM) >> On 03/28/2013 10:28 AM, Alexander Shishkin wrote: >>> Svetoslav Neykov <svetoslav@xxxxxxxxxxx> writes: >>> >>>> Convert between big-endian and little-endian format when accessing >>>> the usb controller structures which are little-endian by >>>> specification. Fix cases where the little-endian memory layout is >>>> taken for granted. The patch doesn't have any effect on the already >>>> supported little-endian architectures. >> >> Has anyone tested how the cpu_to_le32 and vice versa effects the >> load/store operations? Does the compiler generate full 32 bit accesses >> on mips (and big endian arm) or is a byte-shift-or pattern used? > > Better late than never... I have checked your question, the value is loaded > in a register and then swapped, so the read is performed only once. Thanks for checking this. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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