diff options
author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-05-27 21:10:18 +0000 |
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committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-05-27 21:10:18 +0000 |
commit | 49ba9447c92d6fca214476381107a180d08e59d1 (patch) | |
tree | 08bcd066ffa49329f29457b36f6ed328d9b1112f /OvmfPkg/Sec/Ia32 | |
parent | a1f11f7547b43a6b86f6925cb8ab3f836b2d5dae (diff) | |
download | edk2-platforms-49ba9447c92d6fca214476381107a180d08e59d1.tar.xz |
Add initial version of Open Virtual Machine Firmware (OVMF) platform.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8398 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Sec/Ia32')
-rw-r--r-- | OvmfPkg/Sec/Ia32/SecEntry.S | 63 | ||||
-rw-r--r-- | OvmfPkg/Sec/Ia32/SecEntry.asm | 60 | ||||
-rw-r--r-- | OvmfPkg/Sec/Ia32/Stack.S | 93 | ||||
-rw-r--r-- | OvmfPkg/Sec/Ia32/SwitchStack.c | 136 |
4 files changed, 352 insertions, 0 deletions
diff --git a/OvmfPkg/Sec/Ia32/SecEntry.S b/OvmfPkg/Sec/Ia32/SecEntry.S new file mode 100644 index 0000000000..9fefebca5f --- /dev/null +++ b/OvmfPkg/Sec/Ia32/SecEntry.S @@ -0,0 +1,63 @@ +# +# ConvertAsm.py: Automatically generated from SecEntry.asm +# +# TITLE SecEntry.asm + +#------------------------------------------------------------------------------ +#* +#* Copyright 2006 - 2009, 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. +#* +#* CpuAsm.asm +#* +#* Abstract: +#* +#------------------------------------------------------------------------------ + + +#include "SecMain.h" + +#EXTERN ASM_PFX(SecCoreStartupWithStack) + +# +# SecCore Entry Point +# +# Processor is in flat protected mode +# +# @param ESI Pointer to SEC Core Entry Point (this function) +# @param EDI Pointer to PEI Core Entry Point +# @param EBP Pointer to the start of the Boot Firmware Volume +# +# @return None +# +# +.intel_syntax +ASM_GLOBAL ASM_PFX(_ModuleEntryPoint) +ASM_PFX(_ModuleEntryPoint): + + # + # Load temporary stack top at very low memory. The C code + # can reload to a better address. + # + mov eax, INITIAL_TOP_OF_STACK + mov esp, eax + nop + + # + # Call into C code + # + push eax + push edi + push esi + push ebp + call ASM_PFX(SecCoreStartupWithStack) + + +#END + diff --git a/OvmfPkg/Sec/Ia32/SecEntry.asm b/OvmfPkg/Sec/Ia32/SecEntry.asm new file mode 100644 index 0000000000..48b97a40f9 --- /dev/null +++ b/OvmfPkg/Sec/Ia32/SecEntry.asm @@ -0,0 +1,60 @@ + TITLE SecEntry.asm
+;------------------------------------------------------------------------------
+;*
+;* Copyright 2006 - 2009, 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.
+;*
+;* CpuAsm.asm
+;*
+;* Abstract:
+;*
+;------------------------------------------------------------------------------
+
+#include "SecMain.h"
+
+ .686
+ .model flat,C
+ .code
+
+EXTERN SecCoreStartupWithStack:PROC
+
+;
+; SecCore Entry Point
+;
+; Processor is in flat protected mode
+;
+; @param ESI Pointer to SEC Core Entry Point (this function)
+; @param EDI Pointer to PEI Core Entry Point
+; @param EBP Pointer to the start of the Boot Firmware Volume
+;
+; @return None
+;
+;
+_ModuleEntryPoint PROC PUBLIC
+
+ ;
+ ; Load temporary stack top at very low memory. The C code
+ ; can reload to a better address.
+ ;
+ mov eax, INITIAL_TOP_OF_STACK
+ mov esp, eax
+ nop
+
+ ;
+ ; Call into C code
+ ;
+ push eax
+ push edi
+ push esi
+ push ebp
+ call SecCoreStartupWithStack
+
+_ModuleEntryPoint ENDP
+
+END
diff --git a/OvmfPkg/Sec/Ia32/Stack.S b/OvmfPkg/Sec/Ia32/Stack.S new file mode 100644 index 0000000000..1f8ad199c6 --- /dev/null +++ b/OvmfPkg/Sec/Ia32/Stack.S @@ -0,0 +1,93 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 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:
+#
+# Stack.asm
+#
+# Abstract:
+#
+# Switch the stack from temporary memory to permenent memory.
+#
+#------------------------------------------------------------------------------
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# SecSwitchStack (
+# UINT32 TemporaryMemoryBase,
+# UINT32 PermenentMemoryBase
+# );
+#------------------------------------------------------------------------------
+
+#include <ProcessorBind.h>
+
+ASM_GLOBAL ASM_PFX(SecSwitchStack)
+ASM_PFX(SecSwitchStack):
+#
+# Save three register: eax, ebx, ecx
+#
+ push %eax
+ push %ebx
+ push %ecx
+ push %edx
+
+#
+# !!CAUTION!! this function address's is pushed into stack after
+# migration of whole temporary memory, so need save it to permenent
+# memory at first!
+#
+
+ movl 20(%esp), %ebx # Save the first parameter
+ movl 24(%esp), %ecx # Save the second parameter
+
+#
+# Save this function's return address into permenent memory at first.
+# Then, Fixup the esp point to permenent memory
+#
+
+ movl %esp, %eax
+ subl %ebx, %eax
+ addl %ecx, %eax
+ movl (%esp), %edx # copy pushed register's value to permenent memory
+ movl %edx, (%eax)
+ movl 4(%esp), %edx
+ movl %edx, 4(%eax)
+ movl 8(%esp), %edx
+ movl %edx, 8(%eax)
+ movl 12(%esp), %edx
+ movl %edx, 12(%eax)
+ movl 16(%esp), %edx
+ movl %edx, 16(%eax)
+ movl %eax, %esp # From now, esp is pointed to permenent memory
+
+#
+# Fixup the ebp point to permenent memory
+#
+ movl %ebp, %eax
+ subl %ebx, %eax
+ addl %ecx, %eax
+ movl %eax, %ebp # From now, ebp is pointed to permenent memory
+
+#
+# Fixup callee's ebp point for PeiDispatch
+#
+ movl (%ebp), %eax
+ subl %ebx, %eax
+ addl %ecx, %eax
+ movl %eax, (%ebp) # From now, Temporary's PPI caller's stack is in permenent memory
+
+ pop %edx
+ pop %ecx
+ pop %ebx
+ pop %eax
+ ret
+
diff --git a/OvmfPkg/Sec/Ia32/SwitchStack.c b/OvmfPkg/Sec/Ia32/SwitchStack.c new file mode 100644 index 0000000000..54fde9494a --- /dev/null +++ b/OvmfPkg/Sec/Ia32/SwitchStack.c @@ -0,0 +1,136 @@ +/** @file
+ Switch Stack functions.
+
+ Copyright (c) 2006 - 2007, Intel Corporation<BR>
+ 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.
+
+**/
+
+//
+// Include common header file for this module.
+//
+
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesLib.h>
+
+/**
+ Transfers control to a function starting with a new stack.
+
+ Transfers control to the function specified by EntryPoint using the new stack
+ specified by NewStack and passing in the parameters specified by Context1 and
+ Context2. Context1 and Context2 are optional and may be NULL. The function
+ EntryPoint must never return.
+
+ If EntryPoint is NULL, then ASSERT().
+ If NewStack is NULL, then ASSERT().
+
+ @param EntryPoint A pointer to function to call with the new stack.
+ @param Context1 A pointer to the context to pass into the EntryPoint
+ function.
+ @param Context2 A pointer to the context to pass into the EntryPoint
+ function.
+ @param NewStack A pointer to the new stack to use for the EntryPoint
+ function.
+ @param NewBsp A pointer to the new BSP for the EntryPoint on IPF. It's
+ Reserved on other architectures.
+
+**/
+VOID
+EFIAPI
+PeiSwitchStacks (
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+ IN VOID *Context1, OPTIONAL
+ IN VOID *Context2, OPTIONAL
+ IN VOID *Context3, OPTIONAL
+ IN VOID *OldTopOfStack,
+ IN VOID *NewStack
+ )
+{
+ BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
+
+ ASSERT (EntryPoint != NULL);
+ ASSERT (NewStack != NULL);
+
+ //
+ // Stack should be aligned with CPU_STACK_ALIGNMENT
+ //
+ ASSERT (((UINTN)NewStack & (CPU_STACK_ALIGNMENT - 1)) == 0);
+
+ JumpBuffer.Eip = (UINTN)EntryPoint;
+ JumpBuffer.Esp = (UINTN)NewStack - sizeof (VOID*);
+ JumpBuffer.Esp -= sizeof (Context1) + sizeof (Context2) + sizeof(Context3);
+ ((VOID**)JumpBuffer.Esp)[1] = Context1;
+ ((VOID**)JumpBuffer.Esp)[2] = Context2;
+ ((VOID**)JumpBuffer.Esp)[3] = Context3;
+
+ LongJump (&JumpBuffer, (UINTN)-1);
+
+ //
+ // InternalSwitchStack () will never return
+ //
+ ASSERT (FALSE);
+}
+
+/**
+ Transfers control to a function starting with a new stack.
+
+ Transfers control to the function specified by EntryPoint using the new stack
+ specified by NewStack and passing in the parameters specified by Context1 and
+ Context2. Context1 and Context2 are optional and may be NULL. The function
+ EntryPoint must never return.
+
+ If EntryPoint is NULL, then ASSERT().
+ If NewStack is NULL, then ASSERT().
+
+ @param EntryPoint A pointer to function to call with the new stack.
+ @param Context1 A pointer to the context to pass into the EntryPoint
+ function.
+ @param Context2 A pointer to the context to pass into the EntryPoint
+ function.
+ @param NewStack A pointer to the new stack to use for the EntryPoint
+ function.
+ @param NewBsp A pointer to the new BSP for the EntryPoint on IPF. It's
+ Reserved on other architectures.
+
+**/
+VOID
+EFIAPI
+SecSwitchStack (
+ IN UINTN TemporaryMemoryBase,
+ IN UINTN PermanentMemoryBase,
+ IN UINTN CopySize
+ )
+{
+ BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
+ UINTN SetJumpFlag;
+
+ ASSERT ((VOID*)TemporaryMemoryBase != NULL);
+ ASSERT ((VOID*)PermanentMemoryBase != NULL);
+
+ SetJumpFlag = SetJump (&JumpBuffer);
+ //
+ // The initial call to SetJump() must always return 0.
+ // Subsequent calls to LongJump() may cause a non-zero value to be returned by SetJump().
+ //
+ if (SetJumpFlag == 0) {
+ DEBUG ((EFI_D_ERROR, "SecSwitchStack+%d: Esp: 0x%xL\n", __LINE__, JumpBuffer.Esp));
+ JumpBuffer.Esp =
+ (INTN)JumpBuffer.Esp -
+ (INTN)TemporaryMemoryBase +
+ (INTN)PermanentMemoryBase;
+ MemoryFence ();
+ CopyMem((VOID*)PermanentMemoryBase, (VOID*)TemporaryMemoryBase, CopySize);
+ LongJump (&JumpBuffer, (UINTN)-1);
+ }
+
+}
+
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