diff options
Diffstat (limited to 'src/arch/x86/tlb.cc')
-rw-r--r-- | src/arch/x86/tlb.cc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc index 08c621615..2e6ea4a22 100644 --- a/src/arch/x86/tlb.cc +++ b/src/arch/x86/tlb.cc @@ -470,6 +470,16 @@ TLB::translate(RequestPtr &req, ThreadContext *tc, bool write, bool execute) //overlapping. req->setPaddr(regNum * sizeof(MiscReg)); return NoFault; + } else if (prefix == IntAddrPrefixIO) { + // TODO If CPL > IOPL or in virtual mode, check the I/O permission + // bitmap in the TSS. + + Addr IOPort = vaddr & ~IntAddrPrefixMask; + // Make sure the address fits in the expected 16 bit IO address + // space. + assert(!(IOPort & ~0xFFFF)); + req->setPaddr(PhysAddrPrefixIO | IOPort); + return NoFault; } else { panic("Access to unrecognized internal address space %#x.\n", prefix); |