projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| e1f414b6 | 1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| bb817c56 HT |
3 | # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
| 4 | # This program and the accompanying materials\r | |
| e1f414b6 | 5 | # are licensed and made available under the terms and conditions of the BSD License\r |
| 6 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | # http://opensource.org/licenses/bsd-license.php\r | |
| 8 | #\r | |
| 9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | #\r | |
| 12 | # Module Name:\r | |
| 13 | #\r | |
| 1f86b07d | 14 | # EnablePaging64.S\r |
| e1f414b6 | 15 | #\r |
| 16 | # Abstract:\r | |
| 17 | #\r | |
| 18 | # InternalX86EnablePaging64 function\r | |
| 19 | #\r | |
| 20 | # Notes:\r | |
| 21 | #\r | |
| 22 | #------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 132f41f0 | 24 | ASM_GLOBAL ASM_PFX(InternalX86EnablePaging64)\r |
| e1f414b6 | 25 | \r |
| 26 | #------------------------------------------------------------------------------\r | |
| 27 | # VOID\r | |
| 28 | # EFIAPI\r | |
| 29 | # InternalX86EnablePaging64 (\r | |
| 30 | # IN UINT16 CodeSelector,\r | |
| 31 | # IN UINT64 EntryPoint,\r | |
| 32 | # IN UINT64 Context1, OPTIONAL\r | |
| 33 | # IN UINT64 Context2, OPTIONAL\r | |
| 34 | # IN UINT64 NewStack\r | |
| 35 | # );\r | |
| 36 | #------------------------------------------------------------------------------\r | |
| 37 | ASM_PFX(InternalX86EnablePaging64):\r | |
| 38 | cli\r | |
| 57246fe0 | 39 | movl $LongStart, (%esp) # offset for far retf, seg is the 1st arg\r |
| e1f414b6 | 40 | movl %cr4, %eax\r |
| 41 | orb $0x20, %al\r | |
| 42 | movl %eax, %cr4 # enable PAE\r | |
| 43 | movl $0xc0000080, %ecx\r | |
| 44 | rdmsr\r | |
| 45 | orb $1, %ah # set LME\r | |
| 46 | wrmsr\r | |
| 47 | movl %cr0, %eax\r | |
| 57246fe0 | 48 | btsl $31, %eax # set PG\r |
| e1f414b6 | 49 | movl %eax, %cr0 # enable paging\r |
| 57246fe0 | 50 | lret # topmost 2 dwords hold the address\r |
| e1f414b6 | 51 | LongStart: # long mode starts here\r |
| 57246fe0 | 52 | .byte 0x67, 0x48 # 32-bit address size, 64-bit operand size\r |
| e1f414b6 | 53 | movl (%esp), %ebx # mov rbx, [esp]\r |
| 54 | .byte 0x67, 0x48\r | |
| 55 | movl 8(%esp), %ecx # mov rcx, [esp + 8]\r | |
| 56 | .byte 0x67, 0x48\r | |
| 57 | movl 0x10(%esp), %edx # mov rdx, [esp + 10h]\r | |
| 58 | .byte 0x67, 0x48\r | |
| 59 | movl 0x18(%esp), %esp # mov rsp, [esp + 18h]\r | |
| 60 | .byte 0x48\r | |
| 57246fe0 | 61 | addl $0x-0x20, %esp # add rsp, -20h\r |
| e1f414b6 | 62 | call *%ebx # call rbx\r |
| 57246fe0 | 63 | jmp . # no one should get here\r |