Da Zheng, le Sun 02 May 2010 20:36:28 +0800, a écrit : > On 10-4-23 下午7:37, Samuel Thibault wrote: > > Depends on how you use the mem device. It it ends up using pmap_enter() > > to actually fill the page table, it will notice whether your physical > > addresses are within RAM or above, see the code there. > I think I find the code to do that. > if (machine_slot[cpu_number()].cpu_type >= CPU_TYPE_I486 > && pa >= phys_last_addr) > template |= INTEL_PTE_NCACHE|INTEL_PTE_WTHRU;
Yes, that's it. > The MMIO address of e1000 is at 0xd8920000 and 0xd8900000. I even insert print > in the code to confirm that the MMIO address has been set non-cache. Ok. Samuel
