On 22 July 2013 15:36, Paolo Bonzini <pbonz...@redhat.com> wrote: > Il 22/07/2013 16:32, Peter Maydell ha scritto: >> In the long term it would be good to identify which boards >> were using isa_mmio purely for the benefit of old_portio >> (which I think is basically "boards where the CPU has no >> concept of port I/O instructions"). > > All of them. Only i386/x86_64 has I/O space, as far as I know.
Sounds plausible. I had wondered if our ISA bus infrastructure assumed that ISA device IO ports live in the system IO space, but it doesn't. Side question: should the ICH9 emulation ich9_lpc_initfn() really put its ISA bus in the system IO space rather than in the pci_address_space_io() ? -- PMM
