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d94e5f67 | 1 | ;------------------------------------------------------------------------------ ;\r |
5b9b0a8d | 2 | ; Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>\r |
0acd8697 | 3 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
d94e5f67 JF |
4 | ;\r |
5 | ; Module Name:\r | |
6 | ;\r | |
7 | ; MpFuncs.nasm\r | |
8 | ;\r | |
9 | ; Abstract:\r | |
10 | ;\r | |
11 | ; This is the assembly code for MP support\r | |
12 | ;\r | |
13 | ;-------------------------------------------------------------------------------\r | |
14 | \r | |
15 | %include "MpEqu.inc"\r | |
16 | extern ASM_PFX(InitializeFloatingPointUnits)\r | |
17 | \r | |
18 | SECTION .text\r | |
19 | \r | |
20 | ;-------------------------------------------------------------------------------------\r | |
21 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This\r | |
22 | ;procedure serializes all the AP processors through an Init sequence. It must be\r | |
23 | ;noted that APs arrive here very raw...ie: real mode, no stack.\r | |
24 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC\r | |
25 | ;IS IN MACHINE CODE.\r | |
26 | ;-------------------------------------------------------------------------------------\r | |
27 | global ASM_PFX(RendezvousFunnelProc)\r | |
28 | ASM_PFX(RendezvousFunnelProc):\r | |
29 | RendezvousFunnelProcStart:\r | |
30 | ; At this point CS = 0x(vv00) and ip= 0x0.\r | |
31 | BITS 16\r | |
32 | mov ebp, eax ; save BIST information\r | |
33 | \r | |
34 | mov ax, cs\r | |
35 | mov ds, ax\r | |
36 | mov es, ax\r | |
37 | mov ss, ax\r | |
38 | xor ax, ax\r | |
39 | mov fs, ax\r | |
40 | mov gs, ax\r | |
41 | \r | |
42 | mov si, BufferStartLocation\r | |
43 | mov ebx, [si]\r | |
44 | \r | |
d94e5f67 JF |
45 | mov si, DataSegmentLocation\r |
46 | mov edx, [si]\r | |
47 | \r | |
f32bfe6d JW |
48 | ;\r |
49 | ; Get start address of 32-bit code in low memory (<1MB)\r | |
50 | ;\r | |
51 | mov edi, ModeTransitionMemoryLocation\r | |
52 | \r | |
d94e5f67 JF |
53 | mov si, GdtrLocation\r |
54 | o32 lgdt [cs:si]\r | |
55 | \r | |
56 | mov si, IdtrLocation\r | |
57 | o32 lidt [cs:si]\r | |
58 | \r | |
f32bfe6d JW |
59 | ;\r |
60 | ; Switch to protected mode\r | |
61 | ;\r | |
8396e2dd JF |
62 | mov eax, cr0 ; Get control register 0\r |
63 | or eax, 000000003h ; Set PE bit (bit #0) & MP\r | |
d94e5f67 JF |
64 | mov cr0, eax\r |
65 | \r | |
f32bfe6d JW |
66 | ; Switch to 32-bit code in executable memory (>1MB)\r |
67 | o32 jmp far [cs:di]\r | |
68 | \r | |
69 | ;\r | |
70 | ; Following code may be copied to memory with type of EfiBootServicesCode.\r | |
71 | ; This is required at DXE phase if NX is enabled for EfiBootServicesCode of\r | |
72 | ; memory.\r | |
73 | ;\r | |
d94e5f67 JF |
74 | BITS 32\r |
75 | Flat32Start: ; protected mode entry point\r | |
76 | mov ds, dx\r | |
77 | mov es, dx\r | |
78 | mov fs, dx\r | |
79 | mov gs, dx\r | |
80 | mov ss, dx\r | |
81 | \r | |
82 | mov esi, ebx\r | |
5c66d125 JF |
83 | \r |
84 | mov edi, esi\r | |
85 | add edi, EnableExecuteDisableLocation\r | |
86 | cmp byte [edi], 0\r | |
87 | jz SkipEnableExecuteDisable\r | |
88 | \r | |
89 | ;\r | |
90 | ; Enable IA32 PAE execute disable\r | |
91 | ;\r | |
92 | \r | |
93 | mov ecx, 0xc0000080\r | |
94 | rdmsr\r | |
95 | bts eax, 11\r | |
96 | wrmsr\r | |
97 | \r | |
98 | mov edi, esi\r | |
99 | add edi, Cr3Location\r | |
100 | mov eax, dword [edi]\r | |
101 | mov cr3, eax\r | |
102 | \r | |
103 | mov eax, cr4\r | |
104 | bts eax, 5\r | |
105 | mov cr4, eax\r | |
106 | \r | |
107 | mov eax, cr0\r | |
108 | bts eax, 31\r | |
109 | mov cr0, eax\r | |
110 | \r | |
111 | SkipEnableExecuteDisable:\r | |
845c5be1 JF |
112 | mov edi, esi\r |
113 | add edi, InitFlagLocation\r | |
114 | cmp dword [edi], 1 ; 1 == ApInitConfig\r | |
115 | jnz GetApicId\r | |
5c66d125 | 116 | \r |
5b9b0a8d RN |
117 | ; Increment the number of APs executing here as early as possible\r |
118 | ; This is decremented in C code when AP is finished executing\r | |
119 | mov edi, esi\r | |
120 | add edi, NumApsExecutingLocation\r | |
121 | lock inc dword [edi]\r | |
122 | \r | |
845c5be1 | 123 | ; AP init\r |
d94e5f67 JF |
124 | mov edi, esi\r |
125 | add edi, LockLocation\r | |
126 | mov eax, NotVacantFlag\r | |
127 | \r | |
128 | TestLock:\r | |
129 | xchg [edi], eax\r | |
130 | cmp eax, NotVacantFlag\r | |
131 | jz TestLock\r | |
132 | \r | |
845c5be1 | 133 | mov ecx, esi\r |
37676b9f | 134 | add ecx, ApIndexLocation\r |
845c5be1 JF |
135 | inc dword [ecx]\r |
136 | mov ebx, [ecx]\r | |
137 | \r | |
138 | Releaselock:\r | |
139 | mov eax, VacantFlag\r | |
140 | xchg [edi], eax\r | |
d94e5f67 | 141 | \r |
d94e5f67 JF |
142 | mov edi, esi\r |
143 | add edi, StackSizeLocation\r | |
144 | mov eax, [edi]\r | |
845c5be1 JF |
145 | mov ecx, ebx\r |
146 | inc ecx\r | |
147 | mul ecx ; EAX = StackSize * (CpuNumber + 1)\r | |
d94e5f67 JF |
148 | mov edi, esi\r |
149 | add edi, StackStartAddressLocation\r | |
150 | add eax, [edi]\r | |
151 | mov esp, eax\r | |
845c5be1 JF |
152 | jmp CProcedureInvoke\r |
153 | \r | |
154 | GetApicId:\r | |
155 | mov eax, 0\r | |
156 | cpuid\r | |
157 | cmp eax, 0bh\r | |
1cbd8330 LE |
158 | jb NoX2Apic ; CPUID level below CPUID_EXTENDED_TOPOLOGY\r |
159 | \r | |
160 | mov eax, 0bh\r | |
161 | xor ecx, ecx\r | |
162 | cpuid\r | |
163 | test ebx, 0ffffh\r | |
164 | jz NoX2Apic ; CPUID.0BH:EBX[15:0] is zero\r | |
165 | \r | |
166 | ; Processor is x2APIC capable; 32-bit x2APIC ID is already in EDX\r | |
167 | jmp GetProcessorNumber\r | |
168 | \r | |
169 | NoX2Apic:\r | |
845c5be1 JF |
170 | ; Processor is not x2APIC capable, so get 8-bit APIC ID\r |
171 | mov eax, 1\r | |
172 | cpuid\r | |
173 | shr ebx, 24\r | |
174 | mov edx, ebx\r | |
845c5be1 | 175 | \r |
845c5be1 JF |
176 | GetProcessorNumber:\r |
177 | ;\r | |
178 | ; Get processor number for this AP\r | |
179 | ; Note that BSP may become an AP due to SwitchBsp()\r | |
180 | ;\r | |
181 | xor ebx, ebx\r | |
182 | lea eax, [esi + CpuInfoLocation]\r | |
183 | mov edi, [eax]\r | |
d94e5f67 | 184 | \r |
845c5be1 JF |
185 | GetNextProcNumber:\r |
186 | cmp [edi], edx ; APIC ID match?\r | |
187 | jz ProgramStack\r | |
dd3fa0cd | 188 | add edi, 20\r |
845c5be1 | 189 | inc ebx\r |
7367cc6c | 190 | jmp GetNextProcNumber\r |
d94e5f67 | 191 | \r |
845c5be1 JF |
192 | ProgramStack:\r |
193 | mov esp, [edi + 12]\r | |
7367cc6c | 194 | \r |
d94e5f67 JF |
195 | CProcedureInvoke:\r |
196 | push ebp ; push BIST data at top of AP stack\r | |
197 | xor ebp, ebp ; clear ebp for call stack trace\r | |
198 | push ebp\r | |
199 | mov ebp, esp\r | |
200 | \r | |
201 | mov eax, ASM_PFX(InitializeFloatingPointUnits)\r | |
202 | call eax ; Call assembly function to initialize FPU per UEFI spec\r | |
203 | \r | |
37676b9f | 204 | push ebx ; Push ApIndex\r |
d94e5f67 JF |
205 | mov eax, esi\r |
206 | add eax, LockLocation\r | |
207 | push eax ; push address of exchange info data buffer\r | |
208 | \r | |
209 | mov edi, esi\r | |
210 | add edi, ApProcedureLocation\r | |
211 | mov eax, [edi]\r | |
212 | \r | |
8396e2dd | 213 | call eax ; Invoke C function\r |
d94e5f67 | 214 | \r |
8396e2dd | 215 | jmp $ ; Never reach here\r |
d94e5f67 JF |
216 | RendezvousFunnelProcEnd:\r |
217 | \r | |
76157021 | 218 | ;-------------------------------------------------------------------------------------\r |
9f91cb01 | 219 | ; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack, CountTofinish);\r |
76157021 JF |
220 | ;-------------------------------------------------------------------------------------\r |
221 | global ASM_PFX(AsmRelocateApLoop)\r | |
222 | ASM_PFX(AsmRelocateApLoop):\r | |
223 | AsmRelocateApLoopStart:\r | |
bf2786dc JF |
224 | mov eax, esp\r |
225 | mov esp, [eax + 16] ; TopOfApStack\r | |
226 | push dword [eax] ; push return address for stack trace\r | |
227 | push ebp\r | |
228 | mov ebp, esp\r | |
229 | mov ebx, [eax + 8] ; ApTargetCState\r | |
230 | mov ecx, [eax + 4] ; MwaitSupport\r | |
9f91cb01 JF |
231 | mov eax, [eax + 20] ; CountTofinish\r |
232 | lock dec dword [eax] ; (*CountTofinish)--\r | |
bf2786dc | 233 | cmp cl, 1 ; Check mwait-monitor support\r |
76157021 JF |
234 | jnz HltLoop\r |
235 | MwaitLoop:\r | |
a7bbe9d2 | 236 | cli\r |
76157021 JF |
237 | mov eax, esp\r |
238 | xor ecx, ecx\r | |
239 | xor edx, edx\r | |
240 | monitor\r | |
bf2786dc | 241 | mov eax, ebx ; Mwait Cx, Target C-State per eax[7:4]\r |
76157021 JF |
242 | shl eax, 4\r |
243 | mwait\r | |
244 | jmp MwaitLoop\r | |
245 | HltLoop:\r | |
246 | cli\r | |
247 | hlt\r | |
248 | jmp HltLoop\r | |
76157021 JF |
249 | AsmRelocateApLoopEnd:\r |
250 | \r | |
d94e5f67 JF |
251 | ;-------------------------------------------------------------------------------------\r |
252 | ; AsmGetAddressMap (&AddressMap);\r | |
253 | ;-------------------------------------------------------------------------------------\r | |
254 | global ASM_PFX(AsmGetAddressMap)\r | |
255 | ASM_PFX(AsmGetAddressMap):\r | |
256 | pushad\r | |
257 | mov ebp,esp\r | |
258 | \r | |
259 | mov ebx, [ebp + 24h]\r | |
260 | mov dword [ebx], RendezvousFunnelProcStart\r | |
261 | mov dword [ebx + 4h], Flat32Start - RendezvousFunnelProcStart\r | |
262 | mov dword [ebx + 8h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
f7f85d83 JF |
263 | mov dword [ebx + 0Ch], AsmRelocateApLoopStart\r |
264 | mov dword [ebx + 10h], AsmRelocateApLoopEnd - AsmRelocateApLoopStart\r | |
f32bfe6d | 265 | mov dword [ebx + 14h], Flat32Start - RendezvousFunnelProcStart\r |
d94e5f67 JF |
266 | \r |
267 | popad\r | |
268 | ret\r | |
269 | \r | |
270 | ;-------------------------------------------------------------------------------------\r | |
271 | ;AsmExchangeRole procedure follows. This procedure executed by current BSP, that is\r | |
272 | ;about to become an AP. It switches it'stack with the current AP.\r | |
273 | ;AsmExchangeRole (IN CPU_EXCHANGE_INFO *MyInfo, IN CPU_EXCHANGE_INFO *OthersInfo);\r | |
274 | ;-------------------------------------------------------------------------------------\r | |
275 | global ASM_PFX(AsmExchangeRole)\r | |
276 | ASM_PFX(AsmExchangeRole):\r | |
277 | ; DO NOT call other functions in this function, since 2 CPU may use 1 stack\r | |
278 | ; at the same time. If 1 CPU try to call a function, stack will be corrupted.\r | |
279 | pushad\r | |
280 | mov ebp,esp\r | |
281 | \r | |
282 | ; esi contains MyInfo pointer\r | |
283 | mov esi, [ebp + 24h]\r | |
284 | \r | |
285 | ; edi contains OthersInfo pointer\r | |
286 | mov edi, [ebp + 28h]\r | |
287 | \r | |
288 | ;Store EFLAGS, GDTR and IDTR register to stack\r | |
289 | pushfd\r | |
290 | mov eax, cr4\r | |
291 | push eax ; push cr4 firstly\r | |
292 | mov eax, cr0\r | |
293 | push eax\r | |
294 | \r | |
295 | sgdt [esi + 8]\r | |
296 | sidt [esi + 14]\r | |
297 | \r | |
298 | ; Store the its StackPointer\r | |
299 | mov [esi + 4],esp\r | |
300 | \r | |
301 | ; update its switch state to STORED\r | |
302 | mov byte [esi], CPU_SWITCH_STATE_STORED\r | |
303 | \r | |
304 | WaitForOtherStored:\r | |
305 | ; wait until the other CPU finish storing its state\r | |
306 | cmp byte [edi], CPU_SWITCH_STATE_STORED\r | |
307 | jz OtherStored\r | |
308 | pause\r | |
309 | jmp WaitForOtherStored\r | |
310 | \r | |
311 | OtherStored:\r | |
312 | ; Since another CPU already stored its state, load them\r | |
313 | ; load GDTR value\r | |
314 | lgdt [edi + 8]\r | |
315 | \r | |
316 | ; load IDTR value\r | |
317 | lidt [edi + 14]\r | |
318 | \r | |
319 | ; load its future StackPointer\r | |
320 | mov esp, [edi + 4]\r | |
321 | \r | |
322 | ; update the other CPU's switch state to LOADED\r | |
323 | mov byte [edi], CPU_SWITCH_STATE_LOADED\r | |
324 | \r | |
325 | WaitForOtherLoaded:\r | |
326 | ; wait until the other CPU finish loading new state,\r | |
327 | ; otherwise the data in stack may corrupt\r | |
328 | cmp byte [esi], CPU_SWITCH_STATE_LOADED\r | |
329 | jz OtherLoaded\r | |
330 | pause\r | |
331 | jmp WaitForOtherLoaded\r | |
332 | \r | |
333 | OtherLoaded:\r | |
334 | ; since the other CPU already get the data it want, leave this procedure\r | |
335 | pop eax\r | |
336 | mov cr0, eax\r | |
337 | pop eax\r | |
338 | mov cr4, eax\r | |
339 | popfd\r | |
340 | \r | |
341 | popad\r | |
342 | ret\r |