* [Qemu-devel] piix_pci.c update_pam() incorrectness
@ 2009-09-19 18:57 Sebastian Herbszt
0 siblings, 0 replies; only message in thread
From: Sebastian Herbszt @ 2009-09-19 18:57 UTC (permalink / raw)
To: qemu-devel
update_pam() in hw/piix_pci.c contains the following:
switch(r) {
...
case 2:
case 0:
/* XXX: should distinguish read/write cases */
for(addr = start; addr < end; addr += 4096) {
cpu_register_physical_memory(addr, 4096,
d->isa_page_descs[(addr - 0xa0000) >> 12]);
}
break;
Is anyone working on fixing this?
This emulation incorrectness prevents "in-place" copies between rom and ram. Bochs
behaviour is correct in this case, but this issue in qemu requires the use of temporary storage
(see bios_shadow_init() in rombios32.c (bochs bios) or shadow.c in seabios).
- Sebastian
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2009-09-19 18:57 [Qemu-devel] piix_pci.c update_pam() incorrectness Sebastian Herbszt
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