[mirror_edk2.git] / UefiCpuPkg / CpuMpPei / X64 / MpFuncs.asm

;------------------------------------------------------------------------------ ;
; Copyright (c) 2015, 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:
;
;   MpFuncs32.asm
;
; Abstract:
;
;   This is the assembly code for MP support
;
;-------------------------------------------------------------------------------

include  MpEqu.inc
extern   InitializeFloatingPointUnits:PROC

.code
;-------------------------------------------------------------------------------------
;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.
;-------------------------------------------------------------------------------------
RendezvousFunnelProc   PROC  PUBLIC
RendezvousFunnelProcStart::
; At this point CS = 0x(vv00) and ip= 0x0.
; Save BIST information to ebp firstly
    db 66h,  08bh, 0e8h               ; mov        ebp, eax    ; save BIST information

    db 8ch,0c8h                       ; mov        ax,cs
    db 8eh,0d8h                       ; mov        ds,ax
    db 8eh,0c0h                       ; mov        es,ax
    db 8eh,0d0h                       ; mov        ss,ax
    db 33h,0c0h                       ; xor        ax,ax
    db 8eh,0e0h                       ; mov        fs,ax
    db 8eh,0e8h                       ; mov        gs,ax

    db 0BEh                           ; opcode of mov si, mem16
    dw BufferStartLocation            ; mov        si, BufferStartLocation
    db 66h,  8Bh, 1Ch                 ; mov        ebx,dword ptr [si]

    db 0BFh                           ; opcode of mov di, mem16
    dw PmodeOffsetLocation            ; mov        di, PmodeOffsetLocation
    db 66h,  8Bh, 05h                 ; mov        eax,dword ptr [di]
    db 8Bh,  0F8h                     ; mov        di, ax
    db 83h,  0EFh,06h                 ; sub        di, 06h
    db 66h,  03h, 0C3h                ; add        eax, ebx
    db 66h,  89h, 05h                 ; mov        dword ptr [di],eax

    db 0BFh                           ; opcode of mov di, mem16
    dw LmodeOffsetLocation            ; mov        di, LmodeOffsetLocation
    db 66h,  8Bh, 05h                 ; mov        eax,dword ptr [di]
    db 8Bh,  0F8h                     ; mov        di, ax
    db 83h,  0EFh,06h                 ; sub        di, 06h
    db 66h,  03h, 0C3h                ; add        eax, ebx
    db 66h,  89h, 05h                 ; mov        dword ptr [di],eax

    db 0BEh
    dw Cr3Location                    ; mov        si, Cr3Location
    db 66h,  8Bh, 0Ch                 ; mov        ecx,dword ptr [si]     ; ECX is keeping the value of CR3

    db 0BEh                           ; opcode of mov si, mem16
    dw GdtrLocation                   ; mov        si, GdtrLocation
    db 66h                            ; db         66h
    db 2Eh,  0Fh, 01h, 14h            ; lgdt       fword ptr cs:[si]

    db 0BEh
    dw IdtrLocation                   ; mov        si, IdtrLocation
    db 66h                            ; db         66h
    db 2Eh,0Fh, 01h, 1Ch              ; lidt       fword ptr cs:[si]

    db 33h,  0C0h                     ; xor        ax,  ax
    db 8Eh,  0D8h                     ; mov        ds,  ax

    db 0Fh,  20h, 0C0h                ; mov        eax, cr0               ;Get control register 0
    db 66h,  83h, 0C8h, 03h           ; or         eax, 000000003h        ;Set PE bit (bit #0) & MP
    db 0Fh,  22h, 0C0h                ; mov        cr0, eax

    db 66h,  67h, 0EAh                ; far jump
    dd 0h                             ; 32-bit offset
    dw PROTECT_MODE_CS                ; 16-bit selector

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

    db 0Fh,  20h,  0E0h           ; mov        eax, cr4
    db 0Fh,  0BAh, 0E8h, 05h      ; bts        eax, 5
    db 0Fh,  22h,  0E0h           ; mov        cr4, eax

    db 0Fh,  22h,  0D9h           ; mov        cr3, ecx

    db 0B9h
    dd 0C0000080h                 ; mov        ecx, 0c0000080h     ; EFER MSR number.
    db 0Fh,  32h                  ; rdmsr                          ; Read EFER.
    db 0Fh,  0BAh, 0E8h, 08h      ; bts        eax, 8              ; Set LME=1.
    db 0Fh,  30h                  ; wrmsr                          ; Write EFER.

    db 0Fh,  20h,  0C0h           ; mov        eax, cr0            ; Read CR0.
    db 0Fh,  0BAh, 0E8h, 1Fh      ; bts        eax, 31             ; Set PG=1.
    db 0Fh,  22h,  0C0h           ; mov        cr0, eax            ; Write CR0.

LONG_JUMP:
    db 67h,  0EAh                 ; far jump
    dd 0h                         ; 32-bit offset
    dw LONG_MODE_CS               ; 16-bit selector

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 ptr [edi], rax
    cmp        rax, NotVacantFlag
    jz         TestLock

    mov        edi, esi
    add        edi, NumApsExecutingLoction
    inc        dword ptr [edi]
    mov        ebx, dword ptr [edi]

ProgramStack:
    mov        edi, esi
    add        edi, StackSizeLocation
    mov        rax, qword ptr [edi]
    mov        edi, esi
    add        edi, StackStartAddressLocation
    add        rax, qword ptr [edi]
    mov        rsp, rax
    mov        qword ptr [edi], rax

Releaselock:
    mov        rax, VacantFlag
    mov        edi, esi
    add        edi, LockLocation
    xchg       qword ptr [edi], rax

CProcedureInvoke:
    push       rbp               ; push BIST data
    xor        rbp, rbp          ; clear ebp for call stack trace
    push       rbp
    mov        rbp, rsp

    mov        rax, 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 ptr [edi]

    sub        rsp, 20h
    call       rax               ; invoke C function
    add        rsp, 20h
    jmp        $

RendezvousFunnelProc   ENDP
RendezvousFunnelProcEnd::


AsmInitializeGdt   PROC
    push       rbp
    mov        rbp, rsp

    lgdt       fword PTR [rcx]  ; update the GDTR

    sub        rsp, 0x10
    lea        rax, SetCodeSelectorFarJump
    mov        [rsp], rax
    mov        rdx, LONG_MODE_CS
    mov        [rsp + 4], dx    ; get new CS
    jmp        fword ptr [rsp]
SetCodeSelectorFarJump:
    add        rsp, 0x10

    mov        rax, LONG_MODE_DS          ; get new DS
    mov        ds, ax
    mov        es, ax
    mov        fs, ax
    mov        gs, ax
    mov        ss, ax

    pop        rbp
    ret
AsmInitializeGdt  ENDP

END
Commit	Line	Data
f9d30595 JF	1	;------------------------------------------------------------------------------ ;
	2	; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
	3	; This program and the accompanying materials
	4	; are licensed and made available under the terms and conditions of the BSD License
	5	; which accompanies this distribution. The full text of the license may be found at
	6	; http://opensource.org/licenses/bsd-license.php.
	7	;
	8	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	9	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	10	;
	11	; Module Name:
	12	;
	13	; MpFuncs32.asm
	14	;
	15	; Abstract:
	16	;
	17	; This is the assembly code for MP support
	18	;
	19	;-------------------------------------------------------------------------------
	20
	21	include MpEqu.inc
46ba0f63 JF	22	extern InitializeFloatingPointUnits:PROC
46ba0f63 JF	23
f9d30595	24	.code
34ff8715 JF	25	;-------------------------------------------------------------------------------------
	26	;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
	27	;procedure serializes all the AP processors through an Init sequence. It must be
	28	;noted that APs arrive here very raw...ie: real mode, no stack.
	29	;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
	30	;IS IN MACHINE CODE.
	31	;-------------------------------------------------------------------------------------
	32	RendezvousFunnelProc PROC PUBLIC
	33	RendezvousFunnelProcStart::
	34	; At this point CS = 0x(vv00) and ip= 0x0.
	35	; Save BIST information to ebp firstly
	36	db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information
	37
	38	db 8ch,0c8h ; mov ax,cs
	39	db 8eh,0d8h ; mov ds,ax
	40	db 8eh,0c0h ; mov es,ax
	41	db 8eh,0d0h ; mov ss,ax
	42	db 33h,0c0h ; xor ax,ax
	43	db 8eh,0e0h ; mov fs,ax
	44	db 8eh,0e8h ; mov gs,ax
	45
	46	db 0BEh ; opcode of mov si, mem16
	47	dw BufferStartLocation ; mov si, BufferStartLocation
	48	db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si]
	49
	50	db 0BFh ; opcode of mov di, mem16
	51	dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation
	52	db 66h, 8Bh, 05h ; mov eax,dword ptr [di]
	53	db 8Bh, 0F8h ; mov di, ax
	54	db 83h, 0EFh,06h ; sub di, 06h
	55	db 66h, 03h, 0C3h ; add eax, ebx
	56	db 66h, 89h, 05h ; mov dword ptr [di],eax
	57
	58	db 0BFh ; opcode of mov di, mem16
	59	dw LmodeOffsetLocation ; mov di, LmodeOffsetLocation
	60	db 66h, 8Bh, 05h ; mov eax,dword ptr [di]
	61	db 8Bh, 0F8h ; mov di, ax
	62	db 83h, 0EFh,06h ; sub di, 06h
	63	db 66h, 03h, 0C3h ; add eax, ebx
	64	db 66h, 89h, 05h ; mov dword ptr [di],eax
	65
	66	db 0BEh
	67	dw Cr3Location ; mov si, Cr3Location
	68	db 66h, 8Bh, 0Ch ; mov ecx,dword ptr [si] ; ECX is keeping the value of CR3
	69
	70	db 0BEh ; opcode of mov si, mem16
	71	dw GdtrLocation ; mov si, GdtrLocation
	72	db 66h ; db 66h
	73	db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
	74
	75	db 0BEh
	76	dw IdtrLocation ; mov si, IdtrLocation
	77	db 66h ; db 66h
	78	db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
	79
	80	db 33h, 0C0h ; xor ax, ax
	81	db 8Eh, 0D8h ; mov ds, ax
	82
	83	db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0
	84	db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP
	85	db 0Fh, 22h, 0C0h ; mov cr0, eax
	86
	87	db 66h, 67h, 0EAh ; far jump
	88	dd 0h ; 32-bit offset
89	dw PROTECT_MODE_CS ; 16-bit selector
90
91	Flat32Start:: ; protected mode entry point
92	mov ax, PROTECT_MODE_DS
93	mov ds, ax
94	mov es, ax
95	mov fs, ax
96	mov gs, ax
97	mov ss, ax
98
99	db 0Fh, 20h, 0E0h ; mov eax, cr4
100	db 0Fh, 0BAh, 0E8h, 05h ; bts eax, 5
101	db 0Fh, 22h, 0E0h ; mov cr4, eax
102
103	db 0Fh, 22h, 0D9h ; mov cr3, ecx
104
105	db 0B9h
106	dd 0C0000080h ; mov ecx, 0c0000080h ; EFER MSR number.
107	db 0Fh, 32h ; rdmsr ; Read EFER.
108	db 0Fh, 0BAh, 0E8h, 08h ; bts eax, 8 ; Set LME=1.
109	db 0Fh, 30h ; wrmsr ; Write EFER.
110
111	db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Read CR0.
112	db 0Fh, 0BAh, 0E8h, 1Fh ; bts eax, 31 ; Set PG=1.
113	db 0Fh, 22h, 0C0h ; mov cr0, eax ; Write CR0.
114
115	LONG_JUMP:
116	db 67h, 0EAh ; far jump
117	dd 0h ; 32-bit offset
118	dw LONG_MODE_CS ; 16-bit selector
119
120	LongModeStart::
121	mov ax, LONG_MODE_DS
122	mov ds, ax
123	mov es, ax
124	mov ss, ax
125
126	mov esi, ebx
127	mov edi, esi
128	add edi, LockLocation
129	mov rax, NotVacantFlag
130
131	TestLock:
132	xchg qword ptr [edi], rax
133	cmp rax, NotVacantFlag
134	jz TestLock
135
136	mov edi, esi
137	add edi, NumApsExecutingLoction
138	inc dword ptr [edi]
139	mov ebx, dword ptr [edi]
140
141	ProgramStack:
142	mov edi, esi
143	add edi, StackSizeLocation
144	mov rax, qword ptr [edi]
145	mov edi, esi
146	add edi, StackStartAddressLocation
147	add rax, qword ptr [edi]
148	mov rsp, rax
149	mov qword ptr [edi], rax
150
151	Releaselock:
152	mov rax, VacantFlag
153	mov edi, esi
154	add edi, LockLocation
155	xchg qword ptr [edi], rax
156
157	CProcedureInvoke:
158	push rbp ; push BIST data
159	xor rbp, rbp ; clear ebp for call stack trace
160	push rbp
161	mov rbp, rsp
162
46ba0f63 JF	163	mov rax, InitializeFloatingPointUnits
	164	sub rsp, 20h
	165	call rax ; Call assembly function to initialize FPU per UEFI spec
	166	add rsp, 20h
34ff8715 JF	167
	168	mov edx, ebx ; edx is NumApsExecuting
	169	mov ecx, esi
	170	add ecx, LockLocation ; rcx is address of exchange info data buffer
	171
	172	mov edi, esi
	173	add edi, ApProcedureLocation
	174	mov rax, qword ptr [edi]
	175
	176	sub rsp, 20h
	177	call rax ; invoke C function
	178	add rsp, 20h
	179	jmp $
	180
	181	RendezvousFunnelProc ENDP
	182	RendezvousFunnelProcEnd::
f9d30595 JF	183
	184
	185	AsmInitializeGdt PROC
	186	push rbp
	187	mov rbp, rsp
	188
	189	lgdt fword PTR [rcx] ; update the GDTR
	190
	191	sub rsp, 0x10
	192	lea rax, SetCodeSelectorFarJump
	193	mov [rsp], rax
	194	mov rdx, LONG_MODE_CS
	195	mov [rsp + 4], dx ; get new CS
	196	jmp fword ptr [rsp]
	197	SetCodeSelectorFarJump:
	198	add rsp, 0x10
	199
	200	mov rax, LONG_MODE_DS ; get new DS
	201	mov ds, ax
	202	mov es, ax
	203	mov fs, ax
	204	mov gs, ax
	205	mov ss, ax
	206
	207	pop rbp
	208	ret
	209	AsmInitializeGdt ENDP
	210
	211	END