added preliminary RSC capability

SESA · Apr 8, 2020 · bef8f3a · bef8f3a
1 parent 9fabb7a
commit bef8f3a
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Showing 11 changed files with 1,562 additions and 628 deletions.
diff --git a/src/native/Debug.cc b/src/native/Debug.cc
@@ -12,9 +12,6 @@ void ebbrt::kvprintf(const char* __restrict format, va_list va) {
   auto len = vsnprintf(nullptr, 0, format, va);
   char buffer[len + 1];  // NOLINT
   vsnprintf(buffer, len + 1, format, va2);
-#ifdef __EBBRT_ENABLE_BAREMETAL_NIC__
-  console::Write("\r");
-#endif
   console::Write(buffer);
 }
 

diff --git a/src/native/EventManager.cc b/src/native/EventManager.cc
@@ -162,11 +162,18 @@ void ebbrt::EventManager::Process() {
 
   asm volatile(".byte 0x0f, 0x01, 0xc8;"
 	       :: "a" ((void*)&flags), "c" (ecx), "d"(edx));
+
+  // https://elixir.bootlin.com/linux/v4.15.1/source/arch/x86/include/asm/mwait.h#L100
   ecx = 1;
 
   //eax = 0x20;
-  eax = 0x60;
-  //eax = 0x30;
+  //eax = 0x60;
+
+  // C1E state
+  //eax = 0x1;
+
+  // C7 state
+  eax = 0x30;
 
   asm volatile("sti; .byte 0x0f, 0x01, 0xc9;"
 	       :: "a" (eax), "c" (ecx));

diff --git a/src/native/Ixgbe.h b/src/native/Ixgbe.h
@@ -51,6 +51,12 @@ enum l4_type { l4_type_udp = 0, l4_type_tcp, l4_type_sctp, l4_type_rsv };
 #define RXFLAG_L4CS (1 << 2)
 #define RXFLAG_L4CS_VALID (1 << 3)
 
+#define IXGBE_RX_BUFFER_WRITE 15
+
+#define mb()	asm volatile("mfence" ::: "memory")
+#define rmb()	asm volatile("lfence" ::: "memory")
+#define wmb()	asm volatile("sfence" ::: "memory")
+
 /***********************
    * RX
    * Descriptors