From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../Library/BaseLib/RiscV64/InternalSwitchStack.c  | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c

(limited to 'roms/edk2/MdePkg/Library/BaseLib/RiscV64/InternalSwitchStack.c')

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);
+}
-- 
cgit