mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-10 14:23:31 +01:00
131 lines
3.1 KiB
NASM
131 lines
3.1 KiB
NASM
;; @file
|
|
; This is the assembly code for transferring to control to OS S3 waking vector
|
|
; for X64 platform
|
|
;
|
|
; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
|
|
;
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
;;
|
|
|
|
extern ASM_PFX(mOriginalHandler)
|
|
extern ASM_PFX(PageFaultHandler)
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
global ASM_PFX(AsmFixAddress16)
|
|
global ASM_PFX(AsmJmpAddr32)
|
|
|
|
global ASM_PFX(AsmTransferControl)
|
|
ASM_PFX(AsmTransferControl):
|
|
; rcx S3WakingVector :DWORD
|
|
; rdx AcpiLowMemoryBase :DWORD
|
|
lea eax, [.0]
|
|
mov r8, 0x2800000000
|
|
or rax, r8
|
|
push rax
|
|
shrd ebx, ecx, 20
|
|
and ecx, 0xf
|
|
mov bx, cx
|
|
mov [@jmp_addr + 1], ebx
|
|
retf
|
|
BITS 16
|
|
.0:
|
|
mov ax, 0x30
|
|
mov ds, ax
|
|
mov es, ax
|
|
mov fs, ax
|
|
mov gs, ax
|
|
mov ss, ax
|
|
mov eax, cr0
|
|
mov ebx, cr4
|
|
and eax, ((~ 0x80000001) & 0xffffffff)
|
|
and bl, ~ (1 << 5)
|
|
mov cr0, eax
|
|
mov ecx, 0xc0000080
|
|
rdmsr
|
|
and ah, ~ 1
|
|
wrmsr
|
|
mov cr4, ebx
|
|
@jmp_addr:
|
|
jmp 0x0:0x0
|
|
|
|
global ASM_PFX(AsmTransferControl32)
|
|
ASM_PFX(AsmTransferControl32):
|
|
BITS 32
|
|
; S3WakingVector :DWORD
|
|
; AcpiLowMemoryBase :DWORD
|
|
push ebp
|
|
mov ebp, esp
|
|
DB 0x8d, 0x5 ; lea eax, AsmTransferControl16
|
|
ASM_PFX(AsmFixAddress16): DD 0
|
|
push 0x28 ; CS
|
|
push eax
|
|
retf
|
|
|
|
global ASM_PFX(AsmTransferControl16)
|
|
ASM_PFX(AsmTransferControl16):
|
|
BITS 16
|
|
mov ax, 0x30
|
|
o32 mov ds, eax
|
|
o32 mov es, eax
|
|
o32 mov fs, eax
|
|
o32 mov gs, eax
|
|
o32 mov ss, eax
|
|
mov eax, cr0 ; Get control register 0
|
|
and eax, 0fffffffeh ; Clear PE bit (bit #0)
|
|
mov cr0, eax ; Activate real mode
|
|
DB 0xea ; jmp far AsmJmpAddr32
|
|
ASM_PFX(AsmJmpAddr32): DD 0
|
|
|
|
global ASM_PFX(PageFaultHandlerHook)
|
|
ASM_PFX(PageFaultHandlerHook):
|
|
BITS 64
|
|
push rax ; save all volatile registers
|
|
push rcx
|
|
push rdx
|
|
push r8
|
|
push r9
|
|
push r10
|
|
push r11
|
|
; save volatile fp registers
|
|
add rsp, -0x68
|
|
stmxcsr [rsp + 0x60]
|
|
movdqa [rsp + 0x0], 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(PageFaultHandler)
|
|
add rsp, 0x20
|
|
|
|
; load volatile fp registers
|
|
ldmxcsr [rsp + 0x60]
|
|
movdqa xmm0, [rsp + 0x0]
|
|
movdqa xmm1, [rsp + 0x10]
|
|
movdqa xmm2, [rsp + 0x20]
|
|
movdqa xmm3, [rsp + 0x30]
|
|
movdqa xmm4, [rsp + 0x40]
|
|
movdqa xmm5, [rsp + 0x50]
|
|
add rsp, 0x68
|
|
|
|
test al, al
|
|
|
|
pop r11
|
|
pop r10
|
|
pop r9
|
|
pop r8
|
|
pop rdx
|
|
pop rcx
|
|
pop rax ; restore all volatile registers
|
|
jnz .1
|
|
jmp qword [ASM_PFX(mOriginalHandler)]
|
|
.1:
|
|
add rsp, 0x8 ; skip error code for PF
|
|
iretq
|
|
|