diff options
Diffstat (limited to 'MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.S')
-rw-r--r-- | MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.S b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.S new file mode 100644 index 0000000..21516d5 --- /dev/null +++ b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.S @@ -0,0 +1,66 @@ +## @file
+#
+# Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+#
+# 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.
+#
+##
+
+#-----------------------------------------
+#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
+
+ASM_GLOBAL ASM_PFX(AsmTransferControl32)
+ASM_PFX(AsmTransferControl32):
+ jmp ASM_PFX(AsmTransferControl)
+
+# dummy
+ASM_GLOBAL ASM_PFX(AsmTransferControl16)
+ASM_PFX(AsmTransferControl16):
+ASM_GLOBAL ASM_PFX(AsmFixAddress16)
+ASM_PFX(AsmFixAddress16):
+ .long 0
+ASM_GLOBAL ASM_PFX(AsmJmpAddr32)
+ASM_PFX(AsmJmpAddr32):
+ .long 0
+
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