RendezvousFunnelProc ENDP
RendezvousFunnelProcEnd::
+AsmCliHltLoop PROC near C PUBLIC
+ cli
+ hlt
+ jmp $-2
+AsmCliHltLoop ENDP
+
+;-------------------------------------------------------------------------------------
+; AsmGetAddressMap (&AddressMap);
+;-------------------------------------------------------------------------------------
+AsmGetAddressMap PROC near C PUBLIC
+ pushad
+ mov ebp,esp
+
+ mov ebx, dword ptr [ebp+24h]
+ mov dword ptr [ebx], RendezvousFunnelProcStart
+ mov dword ptr [ebx + 4h], Flat32Start - RendezvousFunnelProcStart
+ mov dword ptr [ebx + 8h], 0
+ mov dword ptr [ebx + 0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
+
+ popad
+ ret
+AsmGetAddressMap ENDP
+
+PAUSE32 MACRO
+ DB 0F3h
+ DB 090h
+ ENDM
+
+;-------------------------------------------------------------------------------------
+;AsmExchangeRole procedure follows. This procedure executed by current BSP, that is
+;about to become an AP. It switches it'stack with the current AP.
+;AsmExchangeRole (IN CPU_EXCHANGE_INFO *MyInfo, IN CPU_EXCHANGE_INFO *OthersInfo);
+;-------------------------------------------------------------------------------------
+AsmExchangeRole PROC near C PUBLIC
+ ; DO NOT call other functions in this function, since 2 CPU may use 1 stack
+ ; at the same time. If 1 CPU try to call a function, stack will be corrupted.
+ pushad
+ mov ebp,esp
+
+ ; esi contains MyInfo pointer
+ mov esi, dword ptr [ebp+24h]
+
+ ; edi contains OthersInfo pointer
+ mov edi, dword ptr [ebp+28h]
+
+ ;Store EFLAGS, GDTR and IDTR register to stack
+ pushfd
+ mov eax, cr4
+ push eax ; push cr4 firstly
+ mov eax, cr0
+ push eax
+
+ sgdt fword ptr [esi+8]
+ sidt fword ptr [esi+14]
+
+ ; Store the its StackPointer
+ mov dword ptr [esi+4],esp
+
+ ; update its switch state to STORED
+ mov byte ptr [esi], CPU_SWITCH_STATE_STORED
+
+WaitForOtherStored:
+ ; wait until the other CPU finish storing its state
+ cmp byte ptr [edi], CPU_SWITCH_STATE_STORED
+ jz OtherStored
+ PAUSE32
+ jmp WaitForOtherStored
+
+OtherStored:
+ ; Since another CPU already stored its state, load them
+ ; load GDTR value
+ lgdt fword ptr [edi+8]
+
+ ; load IDTR value
+ lidt fword ptr [edi+14]
+
+ ; load its future StackPointer
+ mov esp, dword ptr [edi+4]
+
+ ; update the other CPU's switch state to LOADED
+ mov byte ptr [edi], CPU_SWITCH_STATE_LOADED
+
+WaitForOtherLoaded:
+ ; wait until the other CPU finish loading new state,
+ ; otherwise the data in stack may corrupt
+ cmp byte ptr [esi], CPU_SWITCH_STATE_LOADED
+ jz OtherLoaded
+ PAUSE32
+ jmp WaitForOtherLoaded
+
+OtherLoaded:
+ ; since the other CPU already get the data it want, leave this procedure
+ pop eax
+ mov cr0, eax
+ pop eax
+ mov cr4, eax
+ popfd
+
+ popad
+ ret
+AsmExchangeRole ENDP
AsmInitializeGdt PROC near C PUBLIC
push ebp