Kumar Gala wrote: >> We are using MPC8555 processor and uboot 1.1.4 both the uboot and >> linux >> was up. Now we plan to port QNX, we are facing following issues. >> >> 1. Qnx is not jumping to the startup location. After giving go >> command >> control is still in the uboot only. >> >> 2. When searching in the mailling list we came to know qnx required >> to >> flush the Data Cache before disabling it in the uboot level >> (common/cmd_bootelf.c line no:59) >> >> 3. I checked other powerpc architecture like 7xx/74xx, 86xx and 4xx. >> These architecture has seperate cache.S file ( cpu/mpc86xx/ >> cache.S). That >> file contains flush_data_cache function to flush the cache before >> disabling it. But in the MPC85xx flushing the data cache was missing. >> >> 4. This is a bug in the 85xx uboot code. Is there any work arround for >> this? > > 1.1.4 is a fairly old u-boot at this point. I believe we have > reworked the PPC cache ops and fixed the fact that 85xx was missing > flush_data_cache in the process. >
Not really, unfortunatelly: the 85xx still lacks flushing the d-cache before disabling it. I was going to fix this by refactoring existing d-cache disabling/flushing routines into a common code that would sit in the lib_ppc/ppccache.S (as mostly exisiting implementations are just copy/paste of the same thing) and have 85xx use it too, but didn't have time yet to clean it up. If anyone is willing to do it sooner, I won't complain :) Rafal ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
