;------------------------------------------------------------------------------ ; ; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.
; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
; Portions copyright (c) 2011 - 2013, ARM Limited. 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. ; ;------------------------------------------------------------------------------ EXPORT InternalSwitchStackAsm EXPORT CpuPause AREA BaseLib_LowLevel, CODE, READONLY ;/** ; ; This allows the caller to switch the stack and goes to the new entry point ; ; @param EntryPoint The pointer to the location to enter ; @param Context Parameter to pass in ; @param Context2 Parameter2 to pass in ; @param NewStack New Location of the stack ; ; @return Nothing. Goes to the Entry Point passing in the new parameters ; ;**/ ;VOID ;EFIAPI ;InternalSwitchStackAsm ( ; SWITCH_STACK_ENTRY_POINT EntryPoint, ; VOID *Context, ; VOID *Context2, ; VOID *NewStack ; ); ; InternalSwitchStackAsm mov x29, #0 mov x30, x0 mov sp, x3 mov x0, x1 mov x1, x2 ret ;/** ; ; Requests CPU to pause for a short period of time. ; ; Requests CPU to pause for a short period of time. Typically used in MP ; systems to prevent memory starvation while waiting for a spin lock. ; ;**/ ;VOID ;EFIAPI ;CpuPause ( ; VOID ; ) ; CpuPause nop nop nop nop nop ret END