[PERF]: Optimize nested interrupt cases (where a pending interrupt exists at the...

[reactos.git] / reactos / hal / halx86 / include / halp.h

diff --git a/reactos/hal/halx86/include/halp.h b/reactos/hal/halx86/include/halp.h
index 17bb5d7..ab7e016 100644 (file)
--- a/reactos/hal/halx86/include/halp.h
+++ b/reactos/hal/halx86/include/halp.h
@@ -22,6 +22,19 @@ typedef struct _HAL_BIOS_FRAME
     ULONG Prefix;
 } HAL_BIOS_FRAME, *PHAL_BIOS_FRAME;
 
+typedef
+VOID
+(*PHAL_SW_INTERRUPT_HANDLER)(
+    VOID
+);
+
+typedef
+FASTCALL
+VOID
+(*PHAL_SW_INTERRUPT_HANDLER_2ND_ENTRY)(
+    IN PKTRAP_FRAME TrapFrame
+);
+
 #define HAL_APC_REQUEST         0
 #define HAL_DPC_REQUEST         1
 
@@ -98,6 +111,28 @@ HalpRealModeStack(IN ULONG Alignment,
     );
 }
 
+//
+// Nested Trap Trampoline
+//
+VOID
+DECLSPEC_NORETURN
+FORCEINLINE
+HalpNestedTrap(IN KIRQL PendingIrql)
+{
+    /* Use the second interrupt handler table */
+    extern PHAL_SW_INTERRUPT_HANDLER_2ND_ENTRY SWInterruptHandlerTable2[3];
+    __asm__ __volatile__
+    (
+        "movl %c[t], %%ecx\n"
+        "jmp *%0\n"
+        :
+        : "im"(SWInterruptHandlerTable2[PendingIrql]),
+          [t] "i"(&PCR->VdmAlert)
+        : "%esp"
+    );
+    UNREACHABLE;
+}
+
 //
 // Commonly stated as being 1.19318MHz
 //
@@ -431,12 +466,6 @@ typedef struct _PIC_MASK
     };    
 } PIC_MASK, *PPIC_MASK;
 
-typedef
-VOID
-(*PHAL_SW_INTERRUPT_HANDLER)(
-    VOID
-);
-
 typedef
 BOOLEAN
 __attribute__((regparm(3)))
@@ -531,6 +560,8 @@ HalpEnableInterruptHandler(IN UCHAR Flags,
 VOID NTAPI HalpInitializePICs(IN BOOLEAN EnableInterrupts);
 VOID HalpApcInterrupt(VOID);
 VOID HalpDispatchInterrupt(VOID);
+VOID FASTCALL HalpApcInterrupt2ndEntry(IN PKTRAP_FRAME TrapFrame);
+VOID FASTCALL HalpDispatchInterrupt2ndEntry(IN PKTRAP_FRAME TrapFrame);
 
 /* timer.c */
 VOID NTAPI HalpInitializeClock(VOID);