[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::

;-------------------------------------------------------------------------------------
;  AsmGetAddressMap (&AddressMap);
;-------------------------------------------------------------------------------------
AsmGetAddressMap   PROC
    mov        rax, offset RendezvousFunnelProcStart
    mov        qword ptr [rcx], rax
    mov        qword ptr [rcx +  8h], Flat32Start - RendezvousFunnelProcStart
    mov        qword ptr [rcx + 10h], LongModeStart - RendezvousFunnelProcStart
    mov        qword ptr [rcx + 18h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
    ret
AsmGetAddressMap   ENDP

;-------------------------------------------------------------------------------------
;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
    ; 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       fword ptr [rsi + 16]
    sidt       fword ptr [rsi + 26]

    ; Store the its StackPointer
    mov        qword ptr [rsi + 8], rsp

    ; update its switch state to STORED
    mov        byte ptr [rsi], CPU_SWITCH_STATE_STORED

WaitForOtherStored:
    ; wait until the other CPU finish storing its state
    cmp        byte ptr [rdi], CPU_SWITCH_STATE_STORED
    jz         OtherStored
    pause
    jmp        WaitForOtherStored

OtherStored:
    ; Since another CPU already stored its state, load them
    ; load GDTR value
    lgdt       fword ptr [rdi + 16]

    ; load IDTR value
    lidt       fword ptr [rdi + 26]

    ; load its future StackPointer
    mov        rsp, qword ptr [rdi + 8]

    ; update the other CPU's switch state to LOADED
    mov        byte ptr [rdi], CPU_SWITCH_STATE_LOADED

WaitForOtherLoaded:
    ; wait until the other CPU finish loading new state,
    ; otherwise the data in stack may corrupt
    cmp        byte ptr [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
AsmExchangeRole   ENDP

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	183
8018cb15 JF	184	;-------------------------------------------------------------------------------------
	185	; AsmGetAddressMap (&AddressMap);
	186	;-------------------------------------------------------------------------------------
	187	AsmGetAddressMap PROC
	188	mov rax, offset RendezvousFunnelProcStart
	189	mov qword ptr [rcx], rax
	190	mov qword ptr [rcx + 8h], Flat32Start - RendezvousFunnelProcStart
	191	mov qword ptr [rcx + 10h], LongModeStart - RendezvousFunnelProcStart
	192	mov qword ptr [rcx + 18h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
	193	ret
	194	AsmGetAddressMap ENDP
f9d30595	195
3798f351 JF	196	;-------------------------------------------------------------------------------------
	197	;AsmExchangeRole procedure follows. This procedure executed by current BSP, that is
	198	;about to become an AP. It switches it'stack with the current AP.
	199	;AsmExchangeRole (IN CPU_EXCHANGE_INFO MyInfo, IN CPU_EXCHANGE_INFO OthersInfo);
	200	;-------------------------------------------------------------------------------------
	201	AsmExchangeRole PROC
	202	; DO NOT call other functions in this function, since 2 CPU may use 1 stack
	203	; at the same time. If 1 CPU try to call a function, stack will be corrupted.
	204
	205	push rax
	206	push rbx
	207	push rcx
	208	push rdx
	209	push rsi
	210	push rdi
	211	push rbp
	212	push r8
	213	push r9
	214	push r10
	215	push r11
	216	push r12
	217	push r13
	218	push r14
	219	push r15
	220
	221	mov rax, cr0
	222	push rax
	223
	224	mov rax, cr4
	225	push rax
	226
	227	; rsi contains MyInfo pointer
	228	mov rsi, rcx
	229
	230	; rdi contains OthersInfo pointer
	231	mov rdi, rdx
	232
	233	;Store EFLAGS, GDTR and IDTR regiter to stack
	234	pushfq
	235	sgdt fword ptr [rsi + 16]
	236	sidt fword ptr [rsi + 26]
	237
	238	; Store the its StackPointer
	239	mov qword ptr [rsi + 8], rsp
	240
	241	; update its switch state to STORED
	242	mov byte ptr [rsi], CPU_SWITCH_STATE_STORED
	243
	244	WaitForOtherStored:
	245	; wait until the other CPU finish storing its state
	246	cmp byte ptr [rdi], CPU_SWITCH_STATE_STORED
	247	jz OtherStored
	248	pause
	249	jmp WaitForOtherStored
	250
	251	OtherStored:
	252	; Since another CPU already stored its state, load them
	253	; load GDTR value
	254	lgdt fword ptr [rdi + 16]
	255
	256	; load IDTR value
	257	lidt fword ptr [rdi + 26]
	258
	259	; load its future StackPointer
260	mov rsp, qword ptr [rdi + 8]
261
262	; update the other CPU's switch state to LOADED
263	mov byte ptr [rdi], CPU_SWITCH_STATE_LOADED
264
265	WaitForOtherLoaded:
266	; wait until the other CPU finish loading new state,
267	; otherwise the data in stack may corrupt
268	cmp byte ptr [rsi], CPU_SWITCH_STATE_LOADED
269	jz OtherLoaded
270	pause
271	jmp WaitForOtherLoaded
272
273	OtherLoaded:
274	; since the other CPU already get the data it want, leave this procedure
275	popfq
276
277	pop rax
278	mov cr4, rax
279
280	pop rax
281	mov cr0, rax
282
283	pop r15
284	pop r14
285	pop r13
286	pop r12
287	pop r11
288	pop r10
289	pop r9
290	pop r8
291	pop rbp
292	pop rdi
293	pop rsi
294	pop rdx
295	pop rcx
296	pop rbx
297	pop rax
298
299	ret
300	AsmExchangeRole ENDP
301
f9d30595 JF	302	AsmInitializeGdt PROC
	303	push rbp
	304	mov rbp, rsp
	305
	306	lgdt fword PTR [rcx] ; update the GDTR
	307
	308	sub rsp, 0x10
	309	lea rax, SetCodeSelectorFarJump
	310	mov [rsp], rax
	311	mov rdx, LONG_MODE_CS
	312	mov [rsp + 4], dx ; get new CS
	313	jmp fword ptr [rsp]
	314	SetCodeSelectorFarJump:
	315	add rsp, 0x10
	316
	317	mov rax, LONG_MODE_DS ; get new DS
	318	mov ds, ax
	319	mov es, ax
	320	mov fs, ax
	321	mov gs, ax
	322	mov ss, ax
	323
	324	pop rbp
	325	ret
	326	AsmInitializeGdt ENDP
	327
	328	END