## @file # # Copyright (c) 2013-2015 Intel Corporation. # # SPDX-License-Identifier: BSD-2-Clause-Patent #----------------------------------------- #VOID #AsmTransferControl ( # IN UINT32 S3WakingVector, # IN UINT32 AcpiLowMemoryBase # ); #----------------------------------------- ASM_GLOBAL ASM_PFX(AsmTransferControl) ASM_PFX(AsmTransferControl): # S3WakingVector :DWORD # AcpiLowMemoryBase :DWORD pushl %ebp movl %esp,%ebp leal LABLE, %eax pushl $0x28 # CS pushl %eax movl 8(%ebp),%ecx shrdl $20,%ecx,%ebx andl $0xf,%ecx movw %cx,%bx movl %ebx, jmp_addr lret LABLE: .byte 0xb8,0x30,0 # mov ax, 30h as selector movw %ax,%ds movw %ax,%es movw %ax,%fs movw %ax,%gs movw %ax,%ss movl %cr0, %eax # Get control register 0 .byte 0x66 .byte 0x83,0xe0,0xfe # and eax, 0fffffffeh ; Clear PE bit (bit #0) .byte 0xf,0x22,0xc0 # mov cr0, eax ; Activate real mode .byte 0xea # jmp far @jmp_addr jmp_addr: .long 0