| //------------------------------------------------------------------------------ | |
| // | |
| // Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> | |
| // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> | |
| // Portions copyright (c) 2011, ARM Limited. All rights reserved.<BR> | |
| // SPDX-License-Identifier: BSD-2-Clause-Patent | |
| // | |
| //------------------------------------------------------------------------------ | |
| .text | |
| .align 5 | |
| GCC_ASM_EXPORT(InternalSwitchStackAsm) | |
| GCC_ASM_EXPORT(CpuPause) | |
| /** | |
| // | |
| // 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 | |
| ); | |
| **/ | |
| ASM_PFX(InternalSwitchStackAsm): | |
| MOV LR, R0 | |
| MOV SP, R3 | |
| MOV R0, R1 | |
| MOV R1, R2 | |
| BX LR | |
| /** | |
| // | |
| // 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 | |
| ) | |
| **/ | |
| ASM_PFX(CpuPause): | |
| nop | |
| nop | |
| nop | |
| nop | |
| nop | |
| BX LR |