On Thu, Mar 30, 2006 at 03:40:25PM +0200, Dirk Behme wrote: > Thiemo Seufer wrote: > >On Tue, Mar 28, 2006 at 08:57:15AM +0200, Dirk Behme wrote: > >>What about the patch in attachment? It first tries to load > >>image as an ELF file. If this fails it falls back to raw > >>image load. Additionally, it takes feature of patch above to > >>go on even if no BIOS is found. > > > > > >A slightly more polished version with less noisy messages is appended. > >It also adjusts the ramdisk load address to physical addressing, > >similiar to the binary kernel load. > > One question I just found: > > If we go on if no BIOS is found/executed and we load some > stuff to e.g. 0x80010000, where is the default address > translation made? As I understand MIPS, code in kseg0 > (0x80000000) and kseg1 (0xA0000000) should be executable > without MMU/TLB setup because it is mapped by default to > physical 0x0. But looks to me that I get a > > cpu_mips_handle_mmu_fault pc 80010000 ad 80010000 rw 2 > is_user 0 smmu 1
That comes not from the MIPS TLB mapping (which is for KSEG0/1 a fixed translation involving the high bits) but the underlying qemu softmmu support. The whole thing works but eats significant performance, there should be room for improvements. Thiemo _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
