| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2008, Intel Corporation | |
| # All rights reserved. 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: | |
| # | |
| # EnablePaging64.S | |
| # | |
| # Abstract: | |
| # | |
| # AsmEnablePaging64 function | |
| # | |
| # Notes: | |
| # | |
| #------------------------------------------------------------------------------ | |
| #------------------------------------------------------------------------------ | |
| # VOID | |
| # EFIAPI | |
| # InternalX86EnablePaging64 ( | |
| # IN UINT16 Cs, | |
| # IN UINT64 EntryPoint, | |
| # IN UINT64 Context1, OPTIONAL | |
| # IN UINT64 Context2, OPTIONAL | |
| # IN UINT64 NewStack | |
| # ); | |
| #------------------------------------------------------------------------------ | |
| .global ASM_PFX(InternalX86EnablePaging64) | |
| ASM_PFX(InternalX86EnablePaging64): | |
| cli | |
| pop %rax # skip the return address | |
| callq Base | |
| Base: | |
| addl $(L1-Base),(%rsp) # offset for ret, seg is the 1st arg | |
| mov %cr4,%rax | |
| or $0x20,%al | |
| mov %rax,%cr4 # enable PAE | |
| mov $0xc0000080,%ecx | |
| rdmsr | |
| or $0x1,%ah # set LME | |
| wrmsr | |
| mov %cr0,%rax | |
| bts $0x1f,%eax | |
| mov %rax,%cr0 # enable paging | |
| lret | |
| L1: # long mode starts here | |
| addr32 mov (%esp),%rbx | |
| addr32 mov 0x8(%esp),%rcx | |
| addr32 mov 0x10(%esp),%rdx | |
| addr32 mov 0x18(%esp),%rsp | |
| add $-0x20,%rsp | |
| callq *%rbx | |
| jmp . # dead loop if EntryPoint() returned |