在2023年11月23日十一月 下午12:29，Thomas Bogendoerfer写道： > On Thu, Nov 23, 2023 at 12:13:11PM +0000, Jiaxun Yang wrote: >> > Ok. Thanks for the heads up. I'll fix the patch to be using ioremap() >> > in v2. ioremap_uc() is just an macro-alias of ioremap() on MIPS. >> >> Perhaps we need to fix ioremap_cache so it can give a KSEG1 address? > > KSEG0 ? Ah yes it's KSEG0. > >> AFAIK for Loongson DMI is located at cached memory so using ioremap_uc >> blindly will cause inconsistency. > > why ? Firmware sometimes does not flush those tables from cache back to memory. For Loongson systems (as well as most MTI systems) cache is enabled by firmware. Thanks. > > Thomas. > > -- > Crap can work. Given enough thrust pigs will fly, but it's not necessarily a > good idea. [ RFC1925, 2.3 ] -- - Jiaxun
