diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/UefiCpuPkg/PiSmmCpuDxeSmm/X64/MpFuncs.nasm')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/UefiCpuPkg/PiSmmCpuDxeSmm/X64/MpFuncs.nasm | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/PiSmmCpuDxeSmm/X64/MpFuncs.nasm b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/PiSmmCpuDxeSmm/X64/MpFuncs.nasm new file mode 100644 index 00000000..3eff0772 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/PiSmmCpuDxeSmm/X64/MpFuncs.nasm @@ -0,0 +1,189 @@ +;------------------------------------------------------------------------------ ; +; Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR> +; SPDX-License-Identifier: BSD-2-Clause-Patent +; +; Module Name: +; +; MpFuncs.nasm +; +; Abstract: +; +; This is the assembly code for Multi-processor S3 support +; +;------------------------------------------------------------------------------- + +%define VacantFlag 0x0 +%define NotVacantFlag 0xff + +%define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart +%define StackStartAddressLocation LockLocation + 0x8 +%define StackSizeLocation LockLocation + 0x10 +%define CProcedureLocation LockLocation + 0x18 +%define GdtrLocation LockLocation + 0x20 +%define IdtrLocation LockLocation + 0x2A +%define BufferStartLocation LockLocation + 0x34 +%define Cr3OffsetLocation LockLocation + 0x38 +%define InitializeFloatingPointUnitsAddress LockLocation + 0x3C + +;------------------------------------------------------------------------------------- +;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 (&WakeUpBuffer,MemAddress); + +;text SEGMENT +DEFAULT REL +SECTION .text + +BITS 16 +global ASM_PFX(RendezvousFunnelProc) +ASM_PFX(RendezvousFunnelProc): +RendezvousFunnelProcStart: + +; At this point CS = 0x(vv00) and ip= 0x0. + + mov ax, cs + mov ds, ax + mov es, ax + mov ss, ax + xor ax, ax + mov fs, ax + mov gs, ax + +flat32Start: + + mov si, BufferStartLocation + mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer + + mov si, Cr3OffsetLocation + mov ecx,dword [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, 0x000000001 ; Set PE bit (bit #0) + mov cr0, eax + +FLAT32_JUMP: + +a32 jmp dword 0x20:0x0 + +BITS 32 +PMODE_ENTRY: ; protected mode entry point + + mov ax, 0x18 +o16 mov ds, ax +o16 mov es, ax +o16 mov fs, ax +o16 mov gs, ax +o16 mov ss, ax ; Flat mode setup. + + mov eax, cr4 + bts eax, 5 + mov cr4, eax + + mov cr3, ecx + + mov esi, edx ; Save wakeup buffer address + + mov ecx, 0xc0000080 ; 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. + +LONG_JUMP: + +a16 jmp dword 0x38:0x0 + +BITS 64 +LongModeStart: + + mov ax, 0x30 +o16 mov ds, ax +o16 mov es, ax +o16 mov ss, ax + + mov edi, esi + add edi, LockLocation + mov al, NotVacantFlag +TestLock: + xchg byte [edi], al + cmp al, NotVacantFlag + jz TestLock + +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 al, VacantFlag + mov edi, esi + add edi, LockLocation + xchg byte [edi], al + + ; + ; Call assembly function to initialize FPU. + ; + mov rax, qword [esi + InitializeFloatingPointUnitsAddress] + sub rsp, 0x20 + call rax + add rsp, 0x20 + + ; + ; Call C Function + ; + mov edi, esi + add edi, CProcedureLocation + mov rax, qword [edi] + + test rax, rax + jz GoToSleep + + sub rsp, 0x20 + call rax + add rsp, 0x20 + +GoToSleep: + cli + hlt + jmp $-2 + +RendezvousFunnelProcEnd: + +;------------------------------------------------------------------------------------- +; AsmGetAddressMap (&AddressMap); +;------------------------------------------------------------------------------------- +; comments here for definition of address map +global ASM_PFX(AsmGetAddressMap) +ASM_PFX(AsmGetAddressMap): + lea rax, [RendezvousFunnelProcStart] + mov qword [rcx], rax + mov qword [rcx+0x8], PMODE_ENTRY - RendezvousFunnelProcStart + mov qword [rcx+0x10], FLAT32_JUMP - RendezvousFunnelProcStart + mov qword [rcx+0x18], RendezvousFunnelProcEnd - RendezvousFunnelProcStart + mov qword [rcx+0x20], LongModeStart - RendezvousFunnelProcStart + mov qword [rcx+0x28], LONG_JUMP - RendezvousFunnelProcStart + ret + |