diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c b/roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c new file mode 100644 index 000000000..0bb292141 --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c @@ -0,0 +1,55 @@ +/** @file
+ Switch stack function for RISC-V
+
+ Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "BaseLibInternals.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.
+ Marker will be ignored on IA-32, x64, and EBC.
+ IPF CPUs expect one additional parameter of type VOID * that specifies
+ the new backing store pointer.
+
+ 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 Marker VA_LIST marker for the variable argument list.
+
+**/
+VOID
+EFIAPI
+InternalSwitchStack (
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+ IN VOID *Context1, OPTIONAL
+ IN VOID *Context2, OPTIONAL
+ IN VOID *NewStack,
+ IN VA_LIST Marker
+ )
+{
+ BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
+
+ DEBUG ((DEBUG_INFO, "RISC-V InternalSwitchStack Entry:%x Context1:%x Context2:%x NewStack%x\n", \
+ EntryPoint, Context1, Context2, NewStack));
+ JumpBuffer.RA = (UINTN)EntryPoint;
+ JumpBuffer.SP = (UINTN)NewStack - sizeof (VOID *);
+ JumpBuffer.S0 = (UINT64)(UINTN)Context1;
+ JumpBuffer.S1 = (UINT64)(UINTN)Context2;
+ LongJump (&JumpBuffer, (UINTN)-1);
+ ASSERT(FALSE);
+}
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