;-------------------------------------------------------------------------------
%include "MpEqu.inc"
+extern ASM_PFX(InitializeFloatingPointUnits)
+
DEFAULT REL
+
SECTION .text
+;-------------------------------------------------------------------------------------
+;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
+;procedure serializes all the AP processors through an Init sequence. It must be
+;noted that APs arrive here very raw...ie: real mode, no stack.
+;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
+;IS IN MACHINE CODE.
+;-------------------------------------------------------------------------------------
+global ASM_PFX(RendezvousFunnelProc)
+ASM_PFX(RendezvousFunnelProc):
+RendezvousFunnelProcStart:
+; At this point CS = 0x(vv00) and ip= 0x0.
+; Save BIST information to ebp firstly
+BITS 16
+
+ mov eax, 1234h
+ mov ebp, eax ; save BIST information
+
+ mov ax, cs
+ mov ds, ax
+ mov es, ax
+ mov ss, ax
+ xor ax, ax
+ mov fs, ax
+ mov gs, ax
+
+ mov si, BufferStartLocation
+ mov ebx, [si]
+
+ mov di, PmodeOffsetLocation
+ mov eax, [di]
+ mov di, ax
+ sub di, 06h
+ add eax, ebx
+ mov [di],eax
+
+ mov di, LmodeOffsetLocation
+ mov eax, [di]
+ mov di, ax
+ sub di, 06h
+ add eax, ebx
+ mov [di],eax
+
+
+ mov si, Cr3Location
+ mov ecx,[si] ; ECX is keeping the value of CR3
+
+ mov si, GdtrLocation
+o32 lgdt [cs:si]
+
+ mov si, IdtrLocation
+o32 lidt [cs:si]
+
+
+ xor ax, ax
+ mov ds, ax
+
+ mov eax, cr0 ;Get control register 0
+ or eax, 000000003h ;Set PE bit (bit #0) & MP
+ mov cr0, eax
+
+ jmp PROTECT_MODE_CS:strict dword 0 ; far jump to protected mode
+BITS 32
+Flat32Start: ; protected mode entry point
+ mov ax, PROTECT_MODE_DS
+ mov ds, ax
+ mov es, ax
+ mov fs, ax
+ mov gs, ax
+ mov ss, ax
+
+ mov eax, cr4
+ bts eax, 5
+ mov cr4, eax
+
+ mov cr3, ecx
+
+
+ mov ecx, 0c0000080h ; EFER MSR number.
+ rdmsr ; Read EFER.
+ bts eax, 8 ; Set LME=1.
+ wrmsr ; Write EFER.
+
+ mov eax, cr0 ; Read CR0.
+ bts eax, 31 ; Set PG=1.
+ mov cr0, eax ; Write CR0.
+
+ jmp LONG_MODE_CS:strict dword 0 ; far jump to long mode
+BITS 64
+LongModeStart:
+ mov ax, LONG_MODE_DS
+ mov ds, ax
+ mov es, ax
+ mov ss, ax
+
+ mov esi, ebx
+ mov edi, esi
+ add edi, LockLocation
+ mov rax, NotVacantFlag
+
+TestLock:
+ xchg qword [edi], rax
+ cmp rax, NotVacantFlag
+ jz TestLock
+
+ mov edi, esi
+ add edi, NumApsExecutingLoction
+ inc dword [edi]
+ mov ebx, [edi]
+
+ProgramStack:
+ mov edi, esi
+ add edi, StackSizeLocation
+ mov rax, qword [edi]
+ mov edi, esi
+ add edi, StackStartAddressLocation
+ add rax, qword [edi]
+ mov rsp, rax
+ mov qword [edi], rax
+
+Releaselock:
+ mov rax, VacantFlag
+ mov edi, esi
+ add edi, LockLocation
+ xchg qword [edi], rax
+
+CProcedureInvoke:
+ push rbp ; push BIST data at top of AP stack
+ xor rbp, rbp ; clear ebp for call stack trace
+ push rbp
+ mov rbp, rsp
+
+ mov rax, ASM_PFX(InitializeFloatingPointUnits)
+ sub rsp, 20h
+ call rax ; Call assembly function to initialize FPU per UEFI spec
+ add rsp, 20h
+
+ mov edx, ebx ; edx is NumApsExecuting
+ mov ecx, esi
+ add ecx, LockLocation ; rcx is address of exchange info data buffer
+
+ mov edi, esi
+ add edi, ApProcedureLocation
+ mov rax, qword [edi]
+
+ sub rsp, 20h
+ call rax ; invoke C function
+ add rsp, 20h
+
+RendezvousFunnelProcEnd:
+
+;-------------------------------------------------------------------------------------
+; AsmGetAddressMap (&AddressMap);
+;-------------------------------------------------------------------------------------
+global ASM_PFX(AsmGetAddressMap)
+ASM_PFX(AsmGetAddressMap):
+ mov rax, ASM_PFX(RendezvousFunnelProc)
+ mov qword [rcx], rax
+ mov qword [rcx + 8h], Flat32Start - RendezvousFunnelProcStart
+ mov qword [rcx + 10h], LongModeStart - RendezvousFunnelProcStart
+ mov qword [rcx + 18h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
+ ret
+
+;-------------------------------------------------------------------------------------
+;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);
+;-------------------------------------------------------------------------------------
+global ASM_PFX(AsmExchangeRole)
+ASM_PFX(AsmExchangeRole):
+ ; 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.
+
+ push rax
+ push rbx
+ push rcx
+ push rdx
+ push rsi
+ push rdi
+ push rbp
+ push r8
+ push r9
+ push r10
+ push r11
+ push r12
+ push r13
+ push r14
+ push r15
+
+ mov rax, cr0
+ push rax
+
+ mov rax, cr4
+ push rax
+
+ ; rsi contains MyInfo pointer
+ mov rsi, rcx
+
+ ; rdi contains OthersInfo pointer
+ mov rdi, rdx
+
+ ;Store EFLAGS, GDTR and IDTR regiter to stack
+ pushfq
+ sgdt [rsi + 16]
+ sidt [rsi + 26]
+
+ ; Store the its StackPointer
+ mov [rsi + 8], rsp
+
+ ; update its switch state to STORED
+ mov byte [rsi], CPU_SWITCH_STATE_STORED
+
+WaitForOtherStored:
+ ; wait until the other CPU finish storing its state
+ cmp byte [rdi], CPU_SWITCH_STATE_STORED
+ jz OtherStored
+ pause
+ jmp WaitForOtherStored
+
+OtherStored:
+ ; Since another CPU already stored its state, load them
+ ; load GDTR value
+ lgdt [rdi + 16]
+
+ ; load IDTR value
+ lidt [rdi + 26]
+
+ ; load its future StackPointer
+ mov rsp, [rdi + 8]
+
+ ; update the other CPU's switch state to LOADED
+ mov byte [rdi], CPU_SWITCH_STATE_LOADED
+
+WaitForOtherLoaded:
+ ; wait until the other CPU finish loading new state,
+ ; otherwise the data in stack may corrupt
+ cmp byte [rsi], CPU_SWITCH_STATE_LOADED
+ jz OtherLoaded
+ pause
+ jmp WaitForOtherLoaded
+
+OtherLoaded:
+ ; since the other CPU already get the data it want, leave this procedure
+ popfq
+
+ pop rax
+ mov cr4, rax
+
+ pop rax
+ mov cr0, rax
+
+ pop r15
+ pop r14
+ pop r13
+ pop r12
+ pop r11
+ pop r10
+ pop r9
+ pop r8
+ pop rbp
+ pop rdi
+ pop rsi
+ pop rdx
+ pop rcx
+ pop rbx
+ pop rax
+
+ ret
+
global ASM_PFX(AsmInitializeGdt)
ASM_PFX(AsmInitializeGdt):
push rbp
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