diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/SwitchStack.s')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/SwitchStack.s | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/SwitchStack.s b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/SwitchStack.s deleted file mode 100644 index 439ebdba7d..0000000000 --- a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/SwitchStack.s +++ /dev/null @@ -1,122 +0,0 @@ -//++
-// Copyright (c) 2004, 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.
-//
-// Module Name:
-//
-// SwitchStack.s
-//
-// Abstract:
-//
-// Contains an implementation of a stack switch for the Itanium-based architecture.
-//
-//
-//
-// Revision History:
-//
-//--
-
- .file "SwitchStack.s"
-
-#include <Asm.h>
-#include <Ia_64Gen.h>
-
-// Define hardware RSE Configuration Register
-//
-// RS Configuration (RSC) bit field positions
-
-#define RSC_MODE 0
-#define RSC_PL 2
-#define RSC_BE 4
-// RSC bits 5-15 reserved
-#define RSC_MBZ0 5
-#define RSC_MBZ0_V 0x3ff
-#define RSC_LOADRS 16
-#define RSC_LOADRS_LEN 14
-// RSC bits 30-63 reserved
-#define RSC_MBZ1 30
-#define RSC_MBZ1_V 0x3ffffffffULL
-
-// RSC modes
-// Lazy
-#define RSC_MODE_LY (0x0)
-// Store intensive
-#define RSC_MODE_SI (0x1)
-// Load intensive
-#define RSC_MODE_LI (0x2)
-// Eager
-#define RSC_MODE_EA (0x3)
-
-// RSC Endian bit values
-#define RSC_BE_LITTLE 0
-#define RSC_BE_BIG 1
-
-// RSC while in kernel: enabled, little endian, pl = 0, eager mode
-#define RSC_KERNEL ((RSC_MODE_EA<<RSC_MODE) | (RSC_BE_LITTLE<<RSC_BE))
-// Lazy RSC in kernel: enabled, little endian, pl = 0, lazy mode
-#define RSC_KERNEL_LAZ ((RSC_MODE_LY<<RSC_MODE) | (RSC_BE_LITTLE<<RSC_BE))
-// RSE disabled: disabled, pl = 0, little endian, eager mode
-#define RSC_KERNEL_DISABLED ((RSC_MODE_LY<<RSC_MODE) | (RSC_BE_LITTLE<<RSC_BE))
-
-
-//VOID
-//SwitchStacks (
-// VOID *ContinuationFunction,
-// UINTN Parameter,
-// UINTN NewTopOfStack,
-// UINTN NewBSPStore OPTIONAL
-//)
-///*++
-//
-//Input Arguments
-//
-// ContinuationFunction - This is a pointer to the PLABEL of the function that should be called once the
-// new stack has been created.
-// Parameter - The parameter to pass to the continuation function
-// NewTopOfStack - This is the new top of the memory stack for ensuing code. This is mandatory and
-// should be non-zero
-// NewBSPStore - This is the new BSP store for the ensuing code. It is optional on IA-32 and mandatory on Itanium-based platform.
-//
-//--*/
-
-PROCEDURE_ENTRY(SwitchStacks)
-
- mov r16 = -0x10;;
- and r16 = r34, r16;; // get new stack value in R16, 0 the last nibble.
- mov r15 = r35;; // Get new BspStore into R15
- mov r13 = r32;; // this is a pointer to the PLABEL of the continuation function.
- mov r17 = r33;; // this is the parameter to pass to the continuation function
-
- alloc r11=0,0,0,0 // Set 0-size frame
- ;;
- flushrs;;
-
- mov r21 = RSC_KERNEL_DISABLED // for rse disable
- ;;
- mov ar.rsc = r21 // turn off RSE
-
- add sp = r0, r16;; // transfer to the EFI stack
- mov ar.bspstore = r15 // switch to EFI BSP
- invala // change of ar.bspstore needs invala.
-
- mov r18 = RSC_KERNEL_LAZ // RSC enabled, Lazy mode
- ;;
- mov ar.rsc = r18 // turn rse on, in kernel mode
- ;;
- alloc r11=0,0,1,0;; // alloc 0 outs going to ensuing DXE IPL service
- mov out0 = r17
- ld8 r16 = [r13],8;; // r16 = address of continuation function from the PLABEL
- ld8 gp = [r13] // gp = gp of continuation function from the PLABEL
- mov b6 = r16
- ;;
- br.call.sptk.few b0=b6;; // Call the continuation function
- ;;
-PROCEDURE_EXIT(SwitchStacks)
-
-
|