X86: Make APICs communicate through the memory system.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/arch/x86/x86_traits.hh b/src/arch/x86/x86_traits.hh
index 6b4671a08..be7572517 100644
--- a/src/arch/x86/x86_traits.hh
+++ b/src/arch/x86/x86_traits.hh
@@ -93,6 +93,7 @@ namespace X86ISA
     const Addr PhysAddrPrefixIO = ULL(0x8000000000000000);
     const Addr PhysAddrPrefixPciConfig = ULL(0xC000000000000000);
     const Addr PhysAddrPrefixLocalAPIC = ULL(0xA000000000000000);
+    const Addr PhysAddrPrefixInterrupts = ULL(0x2000000000000000);
     // Each APIC gets two pages. One page is used for local apics to field
     // accesses from the CPU, and the other is for all APICs to communicate.
     const Addr PhysAddrAPICRangeSize = 1 << 12;
@@ -115,6 +116,13 @@ namespace X86ISA
         assert(addr < (1 << 12));
         return PhysAddrPrefixLocalAPIC | (id * (1 << 12)) | addr;
     }
+
+    static inline Addr
+    x86InterruptAddress(const uint8_t id, const uint16_t addr)
+    {
+        assert(addr < PhysAddrAPICRangeSize);
+        return PhysAddrPrefixInterrupts | (id * PhysAddrAPICRangeSize) | addr;
+    }
 }
 
 #endif //__ARCH_X86_X86TRAITS_HH__