]>
Commit | Line | Data |
---|---|---|
f9d30595 JF |
1 | ;------------------------------------------------------------------------------ ; |
2 | ; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> | |
3 | ; This program and the accompanying materials | |
4 | ; are licensed and made available under the terms and conditions of the BSD License | |
5 | ; which accompanies this distribution. The full text of the license may be found at | |
6 | ; http://opensource.org/licenses/bsd-license.php. | |
7 | ; | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
10 | ; | |
11 | ; Module Name: | |
12 | ; | |
13 | ; MpFuncs32.asm | |
14 | ; | |
15 | ; Abstract: | |
16 | ; | |
17 | ; This is the assembly code for MP support | |
18 | ; | |
19 | ;------------------------------------------------------------------------------- | |
20 | ||
21 | .686p | |
22 | .model flat | |
23 | ||
24 | include MpEqu.inc | |
46ba0f63 | 25 | InitializeFloatingPointUnits PROTO C |
da1475e0 | 26 | |
f9d30595 JF |
27 | .code |
28 | ||
da1475e0 JF |
29 | ;------------------------------------------------------------------------------------- |
30 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This | |
31 | ;procedure serializes all the AP processors through an Init sequence. It must be | |
32 | ;noted that APs arrive here very raw...ie: real mode, no stack. | |
33 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC | |
34 | ;IS IN MACHINE CODE. | |
35 | ;------------------------------------------------------------------------------------- | |
36 | RendezvousFunnelProc PROC PUBLIC | |
37 | RendezvousFunnelProcStart:: | |
38 | ; At this point CS = 0x(vv00) and ip= 0x0. | |
39 | ; Save BIST information to ebp firstly | |
40 | db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information | |
41 | ||
42 | db 8ch,0c8h ; mov ax,cs | |
43 | db 8eh,0d8h ; mov ds,ax | |
44 | db 8eh,0c0h ; mov es,ax | |
45 | db 8eh,0d0h ; mov ss,ax | |
46 | db 33h,0c0h ; xor ax,ax | |
47 | db 8eh,0e0h ; mov fs,ax | |
48 | db 8eh,0e8h ; mov gs,ax | |
49 | ||
50 | db 0BEh ; opcode of mov si, mem16 | |
51 | dw BufferStartLocation ; mov si, BufferStartLocation | |
52 | db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si] | |
53 | ||
54 | db 0BFh ; opcode of mov di, mem16 | |
55 | dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation | |
56 | db 66h, 8Bh, 05h ; mov eax,dword ptr [di] | |
57 | db 8Bh, 0F8h ; mov di, ax | |
58 | db 83h, 0EFh,06h ; sub di, 06h | |
59 | db 66h, 03h, 0C3h ; add eax, ebx | |
60 | db 66h, 89h, 05h ; mov dword ptr [di],eax | |
61 | ||
62 | db 0BEh ; opcode of mov si, mem16 | |
63 | dw GdtrLocation ; mov si, GdtrLocation | |
64 | db 66h ; db 66h | |
65 | db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si] | |
66 | ||
67 | db 0BEh | |
68 | dw IdtrLocation ; mov si, IdtrLocation | |
69 | db 66h ; db 66h | |
70 | db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si] | |
71 | ||
72 | db 33h, 0C0h ; xor ax, ax | |
73 | db 8Eh, 0D8h ; mov ds, ax | |
74 | ||
75 | db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0 | |
76 | db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP | |
77 | db 0Fh, 22h, 0C0h ; mov cr0, eax | |
78 | ||
79 | db 66h, 67h, 0EAh ; far jump | |
80 | dd 0h ; 32-bit offset | |
81 | dw PROTECT_MODE_CS ; 16-bit selector | |
82 | ||
83 | Flat32Start:: ; protected mode entry point | |
84 | mov ax, PROTECT_MODE_DS | |
85 | mov ds, ax | |
86 | mov es, ax | |
87 | mov fs, ax | |
88 | mov gs, ax | |
89 | mov ss, ax | |
90 | ||
91 | mov esi, ebx | |
92 | mov edi, esi | |
93 | add edi, LockLocation | |
94 | mov eax, NotVacantFlag | |
95 | ||
96 | TestLock: | |
97 | xchg dword ptr [edi], eax | |
98 | cmp eax, NotVacantFlag | |
99 | jz TestLock | |
100 | ||
101 | mov edi, esi | |
102 | add edi, NumApsExecutingLoction | |
103 | inc dword ptr [edi] | |
104 | mov ebx, dword ptr [edi] | |
105 | ||
106 | ProgramStack: | |
107 | mov edi, esi | |
108 | add edi, StackSizeLocation | |
109 | mov eax, dword ptr [edi] | |
110 | mov edi, esi | |
111 | add edi, StackStartAddressLocation | |
112 | add eax, dword ptr [edi] | |
113 | mov esp, eax | |
114 | mov dword ptr [edi], eax | |
115 | ||
116 | Releaselock: | |
117 | mov eax, VacantFlag | |
118 | mov edi, esi | |
119 | add edi, LockLocation | |
120 | xchg dword ptr [edi], eax | |
121 | ||
122 | CProcedureInvoke: | |
123 | push ebp ; push BIST data at top of AP stack | |
124 | xor ebp, ebp ; clear ebp for call stack trace | |
125 | push ebp | |
126 | mov ebp, esp | |
127 | ||
46ba0f63 JF |
128 | mov eax, InitializeFloatingPointUnits |
129 | call eax ; Call assembly function to initialize FPU per UEFI spec | |
da1475e0 JF |
130 | |
131 | push ebx ; Push NumApsExecuting | |
132 | mov eax, esi | |
133 | add eax, LockLocation | |
134 | push eax ; push address of exchange info data buffer | |
135 | ||
136 | mov edi, esi | |
137 | add edi, ApProcedureLocation | |
138 | mov eax, dword ptr [edi] | |
139 | ||
140 | call eax ; invoke C function | |
141 | ||
142 | jmp $ ; never reach here | |
143 | ||
144 | RendezvousFunnelProc ENDP | |
145 | RendezvousFunnelProcEnd:: | |
146 | ||
8018cb15 JF |
147 | ;------------------------------------------------------------------------------------- |
148 | ; AsmGetAddressMap (&AddressMap); | |
149 | ;------------------------------------------------------------------------------------- | |
150 | AsmGetAddressMap PROC near C PUBLIC | |
151 | pushad | |
152 | mov ebp,esp | |
153 | ||
154 | mov ebx, dword ptr [ebp+24h] | |
155 | mov dword ptr [ebx], RendezvousFunnelProcStart | |
156 | mov dword ptr [ebx + 4h], Flat32Start - RendezvousFunnelProcStart | |
157 | mov dword ptr [ebx + 8h], 0 | |
158 | mov dword ptr [ebx + 0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart | |
159 | ||
160 | popad | |
161 | ret | |
162 | AsmGetAddressMap ENDP | |
f9d30595 | 163 | |
3798f351 JF |
164 | PAUSE32 MACRO |
165 | DB 0F3h | |
166 | DB 090h | |
167 | ENDM | |
168 | ||
169 | ;------------------------------------------------------------------------------------- | |
170 | ;AsmExchangeRole procedure follows. This procedure executed by current BSP, that is | |
171 | ;about to become an AP. It switches it'stack with the current AP. | |
172 | ;AsmExchangeRole (IN CPU_EXCHANGE_INFO *MyInfo, IN CPU_EXCHANGE_INFO *OthersInfo); | |
173 | ;------------------------------------------------------------------------------------- | |
174 | AsmExchangeRole PROC near C PUBLIC | |
175 | ; DO NOT call other functions in this function, since 2 CPU may use 1 stack | |
176 | ; at the same time. If 1 CPU try to call a function, stack will be corrupted. | |
177 | pushad | |
178 | mov ebp,esp | |
179 | ||
180 | ; esi contains MyInfo pointer | |
181 | mov esi, dword ptr [ebp+24h] | |
182 | ||
183 | ; edi contains OthersInfo pointer | |
184 | mov edi, dword ptr [ebp+28h] | |
185 | ||
186 | ;Store EFLAGS, GDTR and IDTR register to stack | |
187 | pushfd | |
188 | mov eax, cr4 | |
189 | push eax ; push cr4 firstly | |
190 | mov eax, cr0 | |
191 | push eax | |
192 | ||
193 | sgdt fword ptr [esi+8] | |
194 | sidt fword ptr [esi+14] | |
195 | ||
196 | ; Store the its StackPointer | |
197 | mov dword ptr [esi+4],esp | |
198 | ||
199 | ; update its switch state to STORED | |
200 | mov byte ptr [esi], CPU_SWITCH_STATE_STORED | |
201 | ||
202 | WaitForOtherStored: | |
203 | ; wait until the other CPU finish storing its state | |
204 | cmp byte ptr [edi], CPU_SWITCH_STATE_STORED | |
205 | jz OtherStored | |
206 | PAUSE32 | |
207 | jmp WaitForOtherStored | |
208 | ||
209 | OtherStored: | |
210 | ; Since another CPU already stored its state, load them | |
211 | ; load GDTR value | |
212 | lgdt fword ptr [edi+8] | |
213 | ||
214 | ; load IDTR value | |
215 | lidt fword ptr [edi+14] | |
216 | ||
217 | ; load its future StackPointer | |
218 | mov esp, dword ptr [edi+4] | |
219 | ||
220 | ; update the other CPU's switch state to LOADED | |
221 | mov byte ptr [edi], CPU_SWITCH_STATE_LOADED | |
222 | ||
223 | WaitForOtherLoaded: | |
224 | ; wait until the other CPU finish loading new state, | |
225 | ; otherwise the data in stack may corrupt | |
226 | cmp byte ptr [esi], CPU_SWITCH_STATE_LOADED | |
227 | jz OtherLoaded | |
228 | PAUSE32 | |
229 | jmp WaitForOtherLoaded | |
230 | ||
231 | OtherLoaded: | |
232 | ; since the other CPU already get the data it want, leave this procedure | |
233 | pop eax | |
234 | mov cr0, eax | |
235 | pop eax | |
236 | mov cr4, eax | |
237 | popfd | |
238 | ||
239 | popad | |
240 | ret | |
241 | AsmExchangeRole ENDP | |
242 | ||
f9d30595 JF |
243 | AsmInitializeGdt PROC near C PUBLIC |
244 | push ebp | |
245 | mov ebp, esp | |
246 | pushad | |
247 | mov edi, [ebp + 8] ; Load GDT register | |
248 | ||
249 | mov ax,cs ; Get the selector data from our code image | |
250 | mov es,ax | |
251 | lgdt FWORD PTR es:[edi] ; and update the GDTR | |
252 | ||
253 | push PROTECT_MODE_CS | |
254 | lea eax, SetCodeSelectorFarJump | |
255 | push eax | |
256 | retf | |
257 | SetCodeSelectorFarJump: | |
258 | mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too | |
259 | mov ds, ax | |
260 | mov es, ax | |
261 | mov fs, ax | |
262 | mov gs, ax | |
263 | mov ss, ax | |
264 | ||
265 | popad | |
266 | pop ebp | |
267 | ret | |
268 | AsmInitializeGdt ENDP | |
269 | ||
270 | END |