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1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
4 | # This program and the accompanying materials\r | |
5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
6 | # which accompanies this distribution. The full text of the license may be found at\r | |
7 | # http://opensource.org/licenses/bsd-license.php.\r | |
8 | #\r | |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | #\r | |
12 | # Abstract:\r | |
13 | #\r | |
14 | # Switch the stack from temporary memory to permenent memory.\r | |
15 | #\r | |
16 | #------------------------------------------------------------------------------\r | |
17 | \r | |
18 | \r | |
19 | #------------------------------------------------------------------------------\r | |
20 | # UINT32\r | |
21 | # EFIAPI\r | |
22 | # Pei2LoaderSwitchStack (\r | |
23 | # VOID\r | |
24 | # )\r | |
25 | #------------------------------------------------------------------------------\r | |
26 | ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)\r | |
27 | ASM_PFX(Pei2LoaderSwitchStack):\r | |
28 | xorl %eax, %eax\r | |
29 | jmp ASM_PFX(FspSwitchStack)\r | |
30 | \r | |
31 | #------------------------------------------------------------------------------\r | |
32 | # UINT32\r | |
33 | # EFIAPI\r | |
34 | # Loader2PeiSwitchStack (\r | |
35 | # VOID\r | |
36 | # )\r | |
37 | #------------------------------------------------------------------------------\r | |
38 | ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)\r | |
39 | ASM_PFX(Loader2PeiSwitchStack):\r | |
40 | jmp ASM_PFX(FspSwitchStack)\r | |
41 | \r | |
42 | #------------------------------------------------------------------------------\r | |
43 | # UINT32\r | |
44 | # EFIAPI\r | |
45 | # FspSwitchStack (\r | |
46 | # VOID\r | |
47 | # )\r | |
48 | #------------------------------------------------------------------------------\r | |
49 | ASM_GLOBAL ASM_PFX(FspSwitchStack)\r | |
50 | ASM_PFX(FspSwitchStack):\r | |
51 | #\r | |
52 | #Save current contexts\r | |
53 | #\r | |
54 | push %eax\r | |
55 | pushf\r | |
56 | cli\r | |
57 | pusha\r | |
58 | sub $0x08, %esp\r | |
59 | sidt (%esp)\r | |
60 | \r | |
61 | #\r | |
62 | # Load new stack\r | |
63 | #\r | |
64 | push %esp\r | |
65 | call ASM_PFX(SwapStack)\r | |
66 | movl %eax, %esp\r | |
67 | \r | |
68 | #\r | |
69 | # Restore previous contexts\r | |
70 | #\r | |
71 | lidt (%esp)\r | |
72 | add $0x08,%esp\r | |
73 | popa\r | |
74 | popf\r | |
75 | add $0x04,%esp\r | |
76 | ret\r | |
77 | \r | |
78 | \r |