UefiCpuPkg PiSmmCpuDxeSmm: Convert X64/SmmInit.asm to NASM

Manually convert X64/SmmInit.asm to X64/SmmInit.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>

UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmInit.nasm

@@ -0,0 +1,130 @@
+;------------------------------------------------------------------------------ ;
+; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   SmmInit.nasm
+;
+; Abstract:
+;
+;   Functions for relocating SMBASE's for all processors
+;
+;-------------------------------------------------------------------------------
+
+extern ASM_PFX(SmmInitHandler)
+extern ASM_PFX(mRebasedFlag)
+extern ASM_PFX(mSmmRelocationOriginalAddress)
+
+global ASM_PFX(gSmmCr3)
+global ASM_PFX(gSmmCr4)
+global ASM_PFX(gSmmCr0)
+global ASM_PFX(gSmmJmpAddr)
+global ASM_PFX(gSmmInitStack)
+global ASM_PFX(gcSmiInitGdtr)
+global ASM_PFX(gcSmmInitSize)
+global ASM_PFX(gcSmmInitTemplate)
+global ASM_PFX(mRebasedFlagAddr32)
+global ASM_PFX(mSmmRelocationOriginalAddressPtr32)
+
+    DEFAULT REL
+    SECTION .text
+
+ASM_PFX(gcSmiInitGdtr):
+            DW      0
+            DQ      0
+
+global ASM_PFX(SmmStartup)
+ASM_PFX(SmmStartup):
+    DB      0x66, 0xb8                   ; mov eax, imm32
+ASM_PFX(gSmmCr3): DD 0
+    mov     cr3, rax
+    DB      0x66, 0x2e
+    lgdt    [ebp + (ASM_PFX(gcSmiInitGdtr) - ASM_PFX(SmmStartup))]
+    DB      0x66, 0xb8                   ; mov eax, imm32
+ASM_PFX(gSmmCr4): DD 0
+    or      ah,  2                      ; enable XMM registers access
+    mov     cr4, rax
+    DB      0x66
+    mov     ecx, 0xc0000080             ; IA32_EFER MSR
+    rdmsr
+    or      ah, 1                       ; set LME bit
+    wrmsr
+    DB      0x66, 0xb8                   ; mov eax, imm32
+ASM_PFX(gSmmCr0): DD 0
+    mov     cr0, rax                    ; enable protected mode & paging
+    DB      0x66, 0xea                   ; far jmp to long mode
+ASM_PFX(gSmmJmpAddr): DQ @LongMode
+@LongMode:                              ; long-mode starts here
+    DB      0x48, 0xbc                   ; mov rsp, imm64
+ASM_PFX(gSmmInitStack): DQ 0
+    and     sp, 0xfff0                  ; make sure RSP is 16-byte aligned
+    ;
+    ; Accoring to X64 calling convention, XMM0~5 are volatile, we need to save
+    ; them before calling C-function.
+    ;
+    sub     rsp, 0x60
+    movdqa  [rsp], xmm0
+    movdqa  [rsp + 0x10], xmm1
+    movdqa  [rsp + 0x20], xmm2
+    movdqa  [rsp + 0x30], xmm3
+    movdqa  [rsp + 0x40], xmm4
+    movdqa  [rsp + 0x50], xmm5
+
+    add     rsp, -0x20
+    call    ASM_PFX(SmmInitHandler)
+    add     rsp, 0x20
+
+    ;
+    ; Restore XMM0~5 after calling C-function.
+    ;
+    movdqa  xmm0, [rsp]
+    movdqa  xmm1, [rsp + 0x10]
+    movdqa  xmm2, [rsp + 0x20]
+    movdqa  xmm3, [rsp + 0x30]
+    movdqa  xmm4, [rsp + 0x40]
+    movdqa  xmm5, [rsp + 0x50]
+
+    rsm
+
+BITS 16
+ASM_PFX(gcSmmInitTemplate):
+    mov ebp, [cs:@L1 - ASM_PFX(gcSmmInitTemplate) + 0x8000]
+    sub ebp, 0x30000
+    jmp ebp
+@L1:
+    DQ      ASM_PFX(SmmStartup)
+
+ASM_PFX(gcSmmInitSize): DW $ - ASM_PFX(gcSmmInitTemplate)
+
+BITS 64
+global ASM_PFX(SmmRelocationSemaphoreComplete)
+ASM_PFX(SmmRelocationSemaphoreComplete):
+    push    rax
+    mov     rax, [ASM_PFX(mRebasedFlag)]
+    mov     byte [rax], 1
+    pop     rax
+    jmp     [ASM_PFX(mSmmRelocationOriginalAddress)]
+
+;
+; Semaphore code running in 32-bit mode
+;
+global ASM_PFX(SmmRelocationSemaphoreComplete32)
+ASM_PFX(SmmRelocationSemaphoreComplete32):
+    ;
+    ; mov byte ptr [], 1
+    ;
+    db      0xc6, 0x5
+ASM_PFX(mRebasedFlagAddr32): dd 0
+    db      1
+    ;
+    ; jmp dword ptr []
+    ;
+    db      0xff, 0x25
+ASM_PFX(mSmmRelocationOriginalAddressPtr32): dd 0