Greentime Hu <green...@gmail.com> 於 2018年10月31日 週三 上午11:48寫道： > > Rick Chen <rickche...@gmail.com> 於 2018年10月29日 週一 上午10:25寫道： > > > > Auer, Lukas <lukas.a...@aisec.fraunhofer.de> 於 2018年10月27日 週六 上午12:27寫道： > > > > > > Hi Rick, > > > > > > On Mon, 2018-10-22 at 09:39 +0800, Rick Chen wrote: > > > > > From: Lukas Auer [mailto:lukas.a...@aisec.fraunhofer.de] > > > > > Sent: Saturday, October 20, 2018 6:08 AM > > > > > To: u-boot@lists.denx.de > > > > > Cc: Bin Meng; Lukas Auer; Greentime Hu; Alexander Graf; Rick Jian- > > > > > Zhi Chen(陳建志) > > > > > Subject: [PATCH 18/30] riscv: invalidate the instruction cache > > > > > before jumping to Linux > > > > > > > > > > Signed-off-by: Lukas Auer <lukas.a...@aisec.fraunhofer.de> > > > > > --- > > > > > > > > > > arch/riscv/lib/bootm.c | 1 + > > > > > 1 file changed, 1 insertion(+) > > > > > > > > > > diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c index > > > > > a7a9fb921b..bc1d4b2864 100644 > > > > > --- a/arch/riscv/lib/bootm.c > > > > > +++ b/arch/riscv/lib/bootm.c > > > > > @@ -38,6 +38,7 @@ int do_bootm_linux(int flag, int argc, char > > > > > *argv[], bootm_headers_t *images) > > > > > return 1; > > > > > > > > > > kernel = (void (*)(ulong, void *))images->ep; > > > > > + invalidate_icache_all(); > > > > > > > > Hi Likas > > > > > > > > I wull use cleanup_before_linux() which is in cpu.c as below > > > > > > > > > > I would prefer to keep the invalidate_icache_all() in bootm.c since it > > > is important in the context of the function. I do agree that the data > > > and instruction caches should be disabled in cleanup_before_linux(). > > > > > > > Hi Lukas > > > > It is ok to keep the invalidate_icache_all() in bootm.c > > > > Rick > > > > Hi Rick, > > Since cleanup_before_linux() will invalidate icache, I think it will > be better to do the whole cache operations there. > As we can see the document from ARM(doc/README.arm-caches) it also said that > " > Cleanup Before Linux: > - cleanup_before_linux() should flush the D-cache, invalidate I-cache, and > disable MMU and caches. > " > This may reduce the redundant codes/cost. > What do you think?
Hi Greentime I agree with you. We shall consider to reduce the redundant codes/cost. Hi Lukas Can you drop this patch ? And move it to cache_flush() ? Thought this patch have implement it. [PATCH] riscv: cache: Implement i/dcache [status, enable, disable] But I will send v2 patch to separate /riscv/lib/cache.c to /riscv/cpu/ax25/cache.c and /riscv/cpu/qemu/cache.c After that you can implement it in /riscv/cpu/qemu/cache.c Rick _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
