]>
Commit | Line | Data |
---|---|---|
3eb9473e | 1 | ;\r |
2 | ; Copyright (c) 2004, Intel Corporation \r | |
3 | ; All rights reserved. This program and the accompanying materials \r | |
4 | ; are licensed and made available under the terms and conditions of the BSD License \r | |
5 | ; which accompanies this distribution. The full text of the license may be found at \r | |
6 | ; http://opensource.org/licenses/bsd-license.php \r | |
7 | ; \r | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
10 | ; \r | |
11 | ; Module Name:\r | |
12 | ; \r | |
13 | ; ProcessorAsms.Asm\r | |
14 | ;\r | |
15 | ; Abstract:\r | |
16 | ; This is separated from processor.c to allow this functions to be built with /O1\r | |
17 | ;\r | |
18 | ; Notes:\r | |
19 | ; - Masm uses "This", "ebx", etc as a directive.\r | |
20 | ; - H2INC is still not embedded in our build process so I translated the struc manually.\r | |
21 | ; - Unreferenced variables/arguments (This, NewBsp, NewStack) were causing compile errors and \r | |
22 | ; did not know of "pragma" mechanism in MASM and I did not want to reduce the warning level. \r | |
23 | ; Instead, I did a dummy referenced.\r | |
24 | ;\r | |
25 | \r | |
26 | .686P\r | |
27 | .MMX\r | |
28 | .MODEL SMALL\r | |
29 | .CODE\r | |
30 | \r | |
31 | EFI_SUCCESS equ 0\r | |
32 | EFI_WARN_RETURN_FROM_LONG_JUMP equ 5\r | |
33 | \r | |
34 | ;\r | |
35 | ; Generated by h2inc run manually\r | |
36 | ;\r | |
37 | _EFI_JUMP_BUFFER STRUCT 2t\r | |
38 | _ebx DWORD ?\r | |
39 | _esi DWORD ?\r | |
40 | _edi DWORD ?\r | |
41 | _ebp DWORD ?\r | |
42 | _esp DWORD ?\r | |
43 | _eip DWORD ?\r | |
44 | _EFI_JUMP_BUFFER ENDS\r | |
45 | \r | |
46 | EFI_JUMP_BUFFER TYPEDEF _EFI_JUMP_BUFFER\r | |
47 | \r | |
48 | TransferControlSetJump PROTO C \\r | |
49 | _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \\r | |
50 | Jump:PTR EFI_JUMP_BUFFER\r | |
51 | \r | |
52 | TransferControlLongJump PROTO C \\r | |
53 | _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \\r | |
54 | Jump:PTR EFI_JUMP_BUFFER\r | |
55 | \r | |
56 | SwitchStacks PROTO C \\r | |
57 | EntryPoint:PTR DWORD, \\r | |
58 | Parameter:DWORD, \\r | |
59 | NewStack:PTR DWORD, \\r | |
60 | NewBsp:PTR DWORD\r | |
61 | \r | |
62 | SwitchIplStacks PROTO C \\r | |
63 | EntryPoint:PTR DWORD, \\r | |
64 | Parameter1:DWORD, \\r | |
65 | Parameter2:DWORD, \\r | |
66 | NewStack:PTR DWORD, \\r | |
67 | NewBsp:PTR DWORD\r | |
68 | \r | |
69 | ;\r | |
70 | ;Routine Description:\r | |
71 | ;\r | |
72 | ; This routine implements the IA32 variant of the SetJump call. Its\r | |
73 | ; responsibility is to store system state information for a possible\r | |
74 | ; subsequent LongJump.\r | |
75 | ;\r | |
76 | ;Arguments:\r | |
77 | ;\r | |
78 | ; Pointer to CPU context save buffer.\r | |
79 | ;\r | |
80 | ;Returns:\r | |
81 | ;\r | |
82 | ; EFI_SUCCESS\r | |
83 | ;\r | |
84 | TransferControlSetJump PROC C \\r | |
85 | _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \\r | |
86 | Jump:PTR EFI_JUMP_BUFFER\r | |
87 | \r | |
88 | mov eax, _This \r | |
89 | mov ecx, Jump\r | |
90 | mov (EFI_JUMP_BUFFER PTR [ecx])._ebx, ebx\r | |
91 | mov (EFI_JUMP_BUFFER PTR [ecx])._esi, esi\r | |
92 | mov (EFI_JUMP_BUFFER PTR [ecx])._edi, edi\r | |
93 | mov eax, [ebp]\r | |
94 | mov (EFI_JUMP_BUFFER PTR [ecx])._ebp, eax\r | |
95 | lea eax, [ebp+4]\r | |
96 | mov (EFI_JUMP_BUFFER PTR [ecx])._esp, eax\r | |
97 | mov eax, [ebp+4]\r | |
98 | mov (EFI_JUMP_BUFFER PTR [ecx])._eip, eax\r | |
99 | mov eax, EFI_SUCCESS\r | |
100 | \r | |
101 | ret\r | |
102 | \r | |
103 | TransferControlSetJump ENDP\r | |
104 | \r | |
105 | ;\r | |
106 | ; Routine Description:\r | |
107 | ; \r | |
108 | ; This routine implements the IA32 variant of the LongJump call. Its\r | |
109 | ; responsibility is restore the system state to the Context Buffer and\r | |
110 | ; pass control back.\r | |
111 | ;\r | |
112 | ; Arguments:\r | |
113 | ; \r | |
114 | ; Pointer to CPU context save buffer.\r | |
115 | ;\r | |
116 | ; Returns:\r | |
117 | ;\r | |
118 | ; EFI_WARN_RETURN_FROM_LONG_JUMP\r | |
119 | ;\r | |
120 | \r | |
121 | TransferControlLongJump PROC C \\r | |
122 | _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \\r | |
123 | Jump:PTR EFI_JUMP_BUFFER\r | |
124 | \r | |
125 | push ebx\r | |
126 | push esi\r | |
127 | push edi\r | |
128 | \r | |
129 | mov eax, _This\r | |
130 | ; set return from SetJump to EFI_WARN_RETURN_FROM_LONG_JUMP\r | |
131 | mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP \r | |
132 | mov ecx, Jump\r | |
133 | mov ebx, (EFI_JUMP_BUFFER PTR [ecx])._ebx\r | |
134 | mov esi, (EFI_JUMP_BUFFER PTR [ecx])._esi\r | |
135 | mov edi, (EFI_JUMP_BUFFER PTR [ecx])._edi\r | |
136 | mov ebp, (EFI_JUMP_BUFFER PTR [ecx])._ebp\r | |
137 | mov esp, (EFI_JUMP_BUFFER PTR [ecx])._esp\r | |
138 | add esp, 4 ;pop the eip\r | |
139 | jmp DWORD PTR (EFI_JUMP_BUFFER PTR [ecx])._eip\r | |
140 | mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP\r | |
141 | \r | |
142 | pop edi\r | |
143 | pop esi\r | |
144 | pop ebx\r | |
145 | ret\r | |
146 | \r | |
147 | TransferControlLongJump ENDP\r | |
148 | \r | |
149 | ;\r | |
150 | ; Routine Description:\r | |
151 | ; This allows the caller to switch the stack and goes to the new entry point\r | |
152 | ;\r | |
153 | ; Arguments:\r | |
154 | ; EntryPoint - Pointer to the location to enter\r | |
155 | ; Parameter - Parameter to pass in\r | |
156 | ; NewStack - New Location of the stack\r | |
157 | ; NewBsp - New BSP\r | |
158 | ;\r | |
159 | ; Returns:\r | |
160 | ;\r | |
161 | ; Nothing. Goes to the Entry Point passing in the new parameters\r | |
162 | ;\r | |
163 | SwitchStacks PROC C \\r | |
164 | EntryPoint:PTR DWORD, \\r | |
165 | Parameter:DWORD, \\r | |
166 | NewStack:PTR DWORD, \\r | |
167 | NewBsp:PTR DWORD\r | |
168 | \r | |
169 | push ebx\r | |
170 | mov eax, NewBsp\r | |
171 | mov ebx, Parameter\r | |
172 | mov ecx, EntryPoint\r | |
173 | mov eax, NewStack\r | |
174 | mov esp, eax\r | |
175 | push ebx\r | |
176 | push 0\r | |
177 | jmp ecx\r | |
178 | \r | |
179 | pop ebx\r | |
180 | ret\r | |
181 | \r | |
182 | SwitchStacks ENDP\r | |
183 | \r | |
184 | ;\r | |
185 | ; Routine Description:\r | |
186 | ; This allows the caller to switch the stack and goes to the new entry point\r | |
187 | ;\r | |
188 | ; Arguments:\r | |
189 | ; EntryPoint - Pointer to the location to enter\r | |
190 | ; Parameter1/Parameter2 - Parameter to pass in\r | |
191 | ; NewStack - New Location of the stack\r | |
192 | ; NewBsp - New BSP\r | |
193 | ;\r | |
194 | ; Returns:\r | |
195 | ;\r | |
196 | ; Nothing. Goes to the Entry Point passing in the new parameters\r | |
197 | ;\r | |
198 | SwitchIplStacks PROC C \\r | |
199 | EntryPoint:PTR DWORD, \\r | |
200 | Parameter1:DWORD, \\r | |
201 | Parameter2:DWORD, \\r | |
202 | NewStack:PTR DWORD, \\r | |
203 | NewBsp:PTR DWORD\r | |
204 | \r | |
205 | push ebx\r | |
206 | mov eax, NewBsp \r | |
207 | mov ebx, Parameter1\r | |
208 | mov edx, Parameter2\r | |
209 | mov ecx, EntryPoint\r | |
210 | mov eax, NewStack\r | |
211 | mov esp, eax\r | |
212 | \r | |
213 | push edx\r | |
214 | push ebx\r | |
215 | call ecx\r | |
216 | \r | |
217 | pop ebx\r | |
218 | ret\r | |
219 | \r | |
220 | SwitchIplStacks ENDP\r | |
221 | \r | |
222 | END\r | |
223 | \r |