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| author | Kuo, Ted <ted.kuo@intel.com> | 2022-03-14 10:48:00 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-03-17 13:23:28 +0000 |
| commit | 411b3ff6ddb4042374a6e61285dac9f5a227f652 (patch) | |
| tree | cd2291c034d2361e181c31c5665b42acc4e6c4fe /IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm | |
| parent | 0531f61376548c8a4d79eaee1dd5f4070ef009bf (diff) | |
| download | edk2-411b3ff6ddb4042374a6e61285dac9f5a227f652.tar.gz edk2-411b3ff6ddb4042374a6e61285dac9f5a227f652.tar.bz2 edk2-411b3ff6ddb4042374a6e61285dac9f5a227f652.zip | |
IntelFsp2Pkg: BaseFspSwitchStackLib Support for X64
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3832
Add BaseFspSwitchStackLib Support for X64.
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Signed-off-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Diffstat (limited to 'IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm')
| -rw-r--r-- | IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm new file mode 100644 index 0000000000..bd36fe4b8b --- /dev/null +++ b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm @@ -0,0 +1,72 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Abstract:
+;
+; Switch the stack from temporary memory to permanent memory.
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+%include "PushPopRegsNasm.inc"
+
+extern ASM_PFX(SwapStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Pei2LoaderSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(Pei2LoaderSwitchStack)
+ASM_PFX(Pei2LoaderSwitchStack):
+ xor rax, rax
+ jmp ASM_PFX(FspSwitchStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Loader2PeiSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(Loader2PeiSwitchStack)
+ASM_PFX(Loader2PeiSwitchStack):
+ jmp ASM_PFX(FspSwitchStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; FspSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(FspSwitchStack)
+ASM_PFX(FspSwitchStack):
+ ; Save current contexts
+ push rdx ; ApiParam2
+ push rcx ; ApiParam1
+ push rax ; FspInfoHeader
+ pushfq
+ cli
+ PUSHA_64
+ sub rsp, 16
+ sidt [rsp]
+
+ ; Load new stack
+ mov rcx, rsp
+ call ASM_PFX(SwapStack)
+ mov rsp, rax
+
+ ; Restore previous contexts
+ lidt [rsp]
+ add rsp, 16
+ POPA_64
+ popfq
+ add rsp, 24 ; FspInfoHeader + ApiParam[2]
+ ret
+
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