mirror of https://github.com/acidanthera/audk.git
322 lines
8.8 KiB
NASM
322 lines
8.8 KiB
NASM
;------------------------------------------------------------------------------ ;
|
|
; 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:
|
|
;
|
|
; MpFuncs.nasm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; This is the assembly code for MP support
|
|
;
|
|
;-------------------------------------------------------------------------------
|
|
|
|
%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
|
|
mov rbp, rsp
|
|
|
|
lgdt [rcx] ; update the GDTR
|
|
|
|
sub rsp, 0x10
|
|
mov rax, ASM_PFX(SetCodeSelectorFarJump)
|
|
mov [rsp], rax
|
|
mov rdx, LONG_MODE_CS
|
|
mov [rsp + 4], dx ; get new CS
|
|
jmp far dword [rsp] ; far jump with new CS
|
|
ASM_PFX(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
|