On 15/11/06 2:58 am, "Herbert Xu" <[EMAIL PROTECTED]> wrote:
>> It isn't always system memory. Some DMA controllers deliberately write to >> device FIFOs. There are also several devices which map areas of onboard RAM. >> At minimum you need to make those to use RAM mappings rather than MMIO. > > I'm not suggesting that we change all existing users of cpu_physical_* > to a new interface that only accessed RAM. However, for cases where it > is obvious that only system RAM is intended (e.g., rtl8139), it makes > sense to bypass MMIO handlers. Could we add a recursion counter to the memory-access functions, and bail if it reaches some limit? -- Keir
