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ec661594 PB |
1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r | |
4 | # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
5 | # Portions copyright (c) 2011 - 2013, ARM Limited. All rights reserved.<BR>\r | |
6 | # This program and the accompanying materials\r | |
7 | # are licensed and made available under the terms and conditions of the BSD License\r | |
8 | # which accompanies this distribution. The full text of the license may be found at\r | |
9 | # http://opensource.org/licenses/bsd-license.php.\r | |
10 | #\r | |
11 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | #\r | |
14 | #------------------------------------------------------------------------------\r | |
807e2604 HL |
15 | \r |
16 | .text\r | |
17 | .align 5\r | |
18 | \r | |
0f895683 OM |
19 | GCC_ASM_EXPORT(InternalSwitchStackAsm)\r |
20 | GCC_ASM_EXPORT(CpuPause)\r | |
807e2604 | 21 | \r |
ec661594 PB |
22 | #/**\r |
23 | #\r | |
24 | # This allows the caller to switch the stack and goes to the new entry point\r | |
25 | #\r | |
26 | # @param EntryPoint The pointer to the location to enter\r | |
27 | # @param Context Parameter to pass in\r | |
28 | # @param Context2 Parameter2 to pass in\r | |
29 | # @param NewStack New Location of the stack\r | |
30 | #\r | |
31 | # @return Nothing. Goes to the Entry Point passing in the new parameters\r | |
32 | #\r | |
33 | #**/\r | |
34 | #VOID\r | |
35 | #EFIAPI\r | |
36 | #InternalSwitchStackAsm (\r | |
37 | # SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
38 | # VOID *Context,\r | |
39 | # VOID *Context2,\r | |
40 | # VOID *NewStack\r | |
41 | # );\r | |
42 | #\r | |
807e2604 | 43 | ASM_PFX(InternalSwitchStackAsm):\r |
35071e15 | 44 | mov x29, #0\r |
807e2604 HL |
45 | mov x30, x0\r |
46 | mov sp, x3\r | |
47 | mov x0, x1\r | |
48 | mov x1, x2\r | |
49 | ret\r | |
50 | \r | |
ec661594 PB |
51 | #/**\r |
52 | #\r | |
53 | # Requests CPU to pause for a short period of time.\r | |
54 | #\r | |
55 | # Requests CPU to pause for a short period of time. Typically used in MP\r | |
56 | # systems to prevent memory starvation while waiting for a spin lock.\r | |
57 | #\r | |
58 | #**/\r | |
59 | #VOID\r | |
60 | #EFIAPI\r | |
61 | #CpuPause (\r | |
62 | # VOID\r | |
63 | # )\r | |
64 | #\r | |
807e2604 HL |
65 | ASM_PFX(CpuPause):\r |
66 | nop\r | |
67 | nop\r | |
68 | nop\r | |
69 | nop\r | |
70 | nop\r | |
71 | ret\r |