]>
Commit | Line | Data |
---|---|---|
d94e5f67 | 1 | ;------------------------------------------------------------------------------ ;\r |
76323c31 | 2 | ; Copyright (c) 2015 - 2022, 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 | |
d94e5f67 JF |
27 | RendezvousFunnelProcStart:\r |
28 | ; At this point CS = 0x(vv00) and ip= 0x0.\r | |
29 | BITS 16\r | |
30 | mov ebp, eax ; save BIST information\r | |
31 | \r | |
32 | mov ax, cs\r | |
33 | mov ds, ax\r | |
34 | mov es, ax\r | |
35 | mov ss, ax\r | |
36 | xor ax, ax\r | |
37 | mov fs, ax\r | |
38 | mov gs, ax\r | |
39 | \r | |
2fba7d4e | 40 | mov si, MP_CPU_EXCHANGE_INFO_FIELD (BufferStart)\r |
d94e5f67 JF |
41 | mov ebx, [si]\r |
42 | \r | |
2fba7d4e | 43 | mov si, MP_CPU_EXCHANGE_INFO_FIELD (DataSegment)\r |
d94e5f67 JF |
44 | mov edx, [si]\r |
45 | \r | |
f32bfe6d JW |
46 | ;\r |
47 | ; Get start address of 32-bit code in low memory (<1MB)\r | |
48 | ;\r | |
2fba7d4e | 49 | mov edi, MP_CPU_EXCHANGE_INFO_FIELD (ModeTransitionMemory)\r |
f32bfe6d | 50 | \r |
2fba7d4e | 51 | mov si, MP_CPU_EXCHANGE_INFO_FIELD (GdtrProfile)\r |
d94e5f67 JF |
52 | o32 lgdt [cs:si]\r |
53 | \r | |
2fba7d4e | 54 | mov si, MP_CPU_EXCHANGE_INFO_FIELD (IdtrProfile)\r |
d94e5f67 JF |
55 | o32 lidt [cs:si]\r |
56 | \r | |
f32bfe6d JW |
57 | ;\r |
58 | ; Switch to protected mode\r | |
59 | ;\r | |
8396e2dd JF |
60 | mov eax, cr0 ; Get control register 0\r |
61 | or eax, 000000003h ; Set PE bit (bit #0) & MP\r | |
d94e5f67 JF |
62 | mov cr0, eax\r |
63 | \r | |
f32bfe6d JW |
64 | ; Switch to 32-bit code in executable memory (>1MB)\r |
65 | o32 jmp far [cs:di]\r | |
66 | \r | |
67 | ;\r | |
68 | ; Following code may be copied to memory with type of EfiBootServicesCode.\r | |
69 | ; This is required at DXE phase if NX is enabled for EfiBootServicesCode of\r | |
70 | ; memory.\r | |
71 | ;\r | |
d94e5f67 JF |
72 | BITS 32\r |
73 | Flat32Start: ; protected mode entry point\r | |
74 | mov ds, dx\r | |
75 | mov es, dx\r | |
76 | mov fs, dx\r | |
77 | mov gs, dx\r | |
78 | mov ss, dx\r | |
79 | \r | |
80 | mov esi, ebx\r | |
5c66d125 JF |
81 | \r |
82 | mov edi, esi\r | |
2fba7d4e | 83 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (EnableExecuteDisable)\r |
5c66d125 JF |
84 | cmp byte [edi], 0\r |
85 | jz SkipEnableExecuteDisable\r | |
86 | \r | |
87 | ;\r | |
88 | ; Enable IA32 PAE execute disable\r | |
89 | ;\r | |
90 | \r | |
91 | mov ecx, 0xc0000080\r | |
92 | rdmsr\r | |
93 | bts eax, 11\r | |
94 | wrmsr\r | |
95 | \r | |
96 | mov edi, esi\r | |
2fba7d4e | 97 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (Cr3)\r |
5c66d125 JF |
98 | mov eax, dword [edi]\r |
99 | mov cr3, eax\r | |
100 | \r | |
101 | mov eax, cr4\r | |
102 | bts eax, 5\r | |
103 | mov cr4, eax\r | |
104 | \r | |
105 | mov eax, cr0\r | |
106 | bts eax, 31\r | |
107 | mov cr0, eax\r | |
108 | \r | |
109 | SkipEnableExecuteDisable:\r | |
845c5be1 | 110 | mov edi, esi\r |
2fba7d4e | 111 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (InitFlag)\r |
845c5be1 JF |
112 | cmp dword [edi], 1 ; 1 == ApInitConfig\r |
113 | jnz GetApicId\r | |
5c66d125 | 114 | \r |
5b9b0a8d RN |
115 | ; Increment the number of APs executing here as early as possible\r |
116 | ; This is decremented in C code when AP is finished executing\r | |
117 | mov edi, esi\r | |
2fba7d4e | 118 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (NumApsExecuting)\r |
5b9b0a8d RN |
119 | lock inc dword [edi]\r |
120 | \r | |
845c5be1 | 121 | ; AP init\r |
62f2cf57 | 122 | mov edi, esi\r |
2fba7d4e | 123 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (ApIndex)\r |
62f2cf57 RN |
124 | mov ebx, 1\r |
125 | lock xadd dword [edi], ebx ; EBX = ApIndex++\r | |
126 | inc ebx ; EBX is CpuNumber\r | |
d94e5f67 | 127 | \r |
d94e5f67 | 128 | mov edi, esi\r |
2fba7d4e | 129 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (StackSize)\r |
d94e5f67 | 130 | mov eax, [edi]\r |
845c5be1 JF |
131 | mov ecx, ebx\r |
132 | inc ecx\r | |
133 | mul ecx ; EAX = StackSize * (CpuNumber + 1)\r | |
d94e5f67 | 134 | mov edi, esi\r |
2fba7d4e | 135 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (StackStart)\r |
d94e5f67 JF |
136 | add eax, [edi]\r |
137 | mov esp, eax\r | |
845c5be1 JF |
138 | jmp CProcedureInvoke\r |
139 | \r | |
140 | GetApicId:\r | |
141 | mov eax, 0\r | |
142 | cpuid\r | |
143 | cmp eax, 0bh\r | |
1cbd8330 LE |
144 | jb NoX2Apic ; CPUID level below CPUID_EXTENDED_TOPOLOGY\r |
145 | \r | |
146 | mov eax, 0bh\r | |
147 | xor ecx, ecx\r | |
148 | cpuid\r | |
149 | test ebx, 0ffffh\r | |
150 | jz NoX2Apic ; CPUID.0BH:EBX[15:0] is zero\r | |
151 | \r | |
152 | ; Processor is x2APIC capable; 32-bit x2APIC ID is already in EDX\r | |
153 | jmp GetProcessorNumber\r | |
154 | \r | |
155 | NoX2Apic:\r | |
845c5be1 JF |
156 | ; Processor is not x2APIC capable, so get 8-bit APIC ID\r |
157 | mov eax, 1\r | |
158 | cpuid\r | |
159 | shr ebx, 24\r | |
160 | mov edx, ebx\r | |
845c5be1 | 161 | \r |
845c5be1 JF |
162 | GetProcessorNumber:\r |
163 | ;\r | |
164 | ; Get processor number for this AP\r | |
165 | ; Note that BSP may become an AP due to SwitchBsp()\r | |
166 | ;\r | |
167 | xor ebx, ebx\r | |
2fba7d4e | 168 | lea eax, [esi + MP_CPU_EXCHANGE_INFO_FIELD (CpuInfo)]\r |
845c5be1 | 169 | mov edi, [eax]\r |
d94e5f67 | 170 | \r |
845c5be1 | 171 | GetNextProcNumber:\r |
2fba7d4e | 172 | cmp dword [edi + CPU_INFO_IN_HOB.InitialApicId], edx ; APIC ID match?\r |
845c5be1 | 173 | jz ProgramStack\r |
2fba7d4e | 174 | add edi, CPU_INFO_IN_HOB_size\r |
845c5be1 | 175 | inc ebx\r |
7367cc6c | 176 | jmp GetNextProcNumber\r |
d94e5f67 | 177 | \r |
845c5be1 | 178 | ProgramStack:\r |
2fba7d4e | 179 | mov esp, dword [edi + CPU_INFO_IN_HOB.ApTopOfStack]\r |
7367cc6c | 180 | \r |
d94e5f67 JF |
181 | CProcedureInvoke:\r |
182 | push ebp ; push BIST data at top of AP stack\r | |
183 | xor ebp, ebp ; clear ebp for call stack trace\r | |
184 | push ebp\r | |
185 | mov ebp, esp\r | |
186 | \r | |
187 | mov eax, ASM_PFX(InitializeFloatingPointUnits)\r | |
188 | call eax ; Call assembly function to initialize FPU per UEFI spec\r | |
189 | \r | |
37676b9f | 190 | push ebx ; Push ApIndex\r |
d94e5f67 | 191 | mov eax, esi\r |
2fba7d4e | 192 | add eax, MP_CPU_EXCHANGE_INFO_OFFSET\r |
d94e5f67 JF |
193 | push eax ; push address of exchange info data buffer\r |
194 | \r | |
195 | mov edi, esi\r | |
2fba7d4e | 196 | add edi, MP_CPU_EXCHANGE_INFO_FIELD (CFunction)\r |
d94e5f67 JF |
197 | mov eax, [edi]\r |
198 | \r | |
8396e2dd | 199 | call eax ; Invoke C function\r |
d94e5f67 | 200 | \r |
8396e2dd | 201 | jmp $ ; Never reach here\r |
d94e5f67 JF |
202 | RendezvousFunnelProcEnd:\r |
203 | \r | |
7b7508ad TL |
204 | ;-------------------------------------------------------------------------------------\r |
205 | ;SwitchToRealProc procedure follows.\r | |
206 | ;NOT USED IN 32 BIT MODE.\r | |
207 | ;-------------------------------------------------------------------------------------\r | |
7b7508ad TL |
208 | SwitchToRealProcStart:\r |
209 | jmp $ ; Never reach here\r | |
210 | SwitchToRealProcEnd:\r | |
211 | \r | |
76157021 | 212 | ;-------------------------------------------------------------------------------------\r |
20da7ca4 TL |
213 | ; AsmRelocateApLoop (MwaitSupport, ApTargetCState, PmCodeSegment, TopOfApStack, CountTofinish, Pm16CodeSegment, SevEsAPJumpTable, WakeupBuffer);\r |
214 | ;\r | |
215 | ; The last three parameters (Pm16CodeSegment, SevEsAPJumpTable and WakeupBuffer) are\r | |
216 | ; specific to SEV-ES support and are not applicable on IA32.\r | |
76157021 | 217 | ;-------------------------------------------------------------------------------------\r |
76157021 | 218 | AsmRelocateApLoopStart:\r |
bf2786dc JF |
219 | mov eax, esp\r |
220 | mov esp, [eax + 16] ; TopOfApStack\r | |
221 | push dword [eax] ; push return address for stack trace\r | |
222 | push ebp\r | |
223 | mov ebp, esp\r | |
224 | mov ebx, [eax + 8] ; ApTargetCState\r | |
225 | mov ecx, [eax + 4] ; MwaitSupport\r | |
9f91cb01 JF |
226 | mov eax, [eax + 20] ; CountTofinish\r |
227 | lock dec dword [eax] ; (*CountTofinish)--\r | |
bf2786dc | 228 | cmp cl, 1 ; Check mwait-monitor support\r |
76157021 JF |
229 | jnz HltLoop\r |
230 | MwaitLoop:\r | |
a7bbe9d2 | 231 | cli\r |
76157021 JF |
232 | mov eax, esp\r |
233 | xor ecx, ecx\r | |
234 | xor edx, edx\r | |
235 | monitor\r | |
bf2786dc | 236 | mov eax, ebx ; Mwait Cx, Target C-State per eax[7:4]\r |
76157021 JF |
237 | shl eax, 4\r |
238 | mwait\r | |
239 | jmp MwaitLoop\r | |
240 | HltLoop:\r | |
241 | cli\r | |
242 | hlt\r | |
243 | jmp HltLoop\r | |
76157021 JF |
244 | AsmRelocateApLoopEnd:\r |
245 | \r | |
d94e5f67 JF |
246 | ;-------------------------------------------------------------------------------------\r |
247 | ; AsmGetAddressMap (&AddressMap);\r | |
248 | ;-------------------------------------------------------------------------------------\r | |
249 | global ASM_PFX(AsmGetAddressMap)\r | |
250 | ASM_PFX(AsmGetAddressMap):\r | |
251 | pushad\r | |
252 | mov ebp,esp\r | |
253 | \r | |
254 | mov ebx, [ebp + 24h]\r | |
2fba7d4e RN |
255 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.RendezvousFunnelAddress], RendezvousFunnelProcStart\r |
256 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.ModeEntryOffset], Flat32Start - RendezvousFunnelProcStart\r | |
257 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.RendezvousFunnelSize], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
258 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.RelocateApLoopFuncAddress], AsmRelocateApLoopStart\r | |
259 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.RelocateApLoopFuncSize], AsmRelocateApLoopEnd - AsmRelocateApLoopStart\r | |
260 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.ModeTransitionOffset], Flat32Start - RendezvousFunnelProcStart\r | |
261 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.SwitchToRealSize], SwitchToRealProcEnd - SwitchToRealProcStart\r | |
262 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.SwitchToRealOffset], SwitchToRealProcStart - RendezvousFunnelProcStart\r | |
263 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.SwitchToRealNoNxOffset], SwitchToRealProcStart - Flat32Start\r | |
264 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.SwitchToRealPM16ModeOffset], 0\r | |
265 | mov dword [ebx + MP_ASSEMBLY_ADDRESS_MAP.SwitchToRealPM16ModeSize], 0\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 | |
2fba7d4e RN |
295 | sgdt [esi + CPU_EXCHANGE_ROLE_INFO.Gdtr]\r |
296 | sidt [esi + CPU_EXCHANGE_ROLE_INFO.Idtr]\r | |
d94e5f67 JF |
297 | \r |
298 | ; Store the its StackPointer\r | |
2fba7d4e | 299 | mov [esi + CPU_EXCHANGE_ROLE_INFO.StackPointer],esp\r |
d94e5f67 JF |
300 | \r |
301 | ; update its switch state to STORED\r | |
2fba7d4e | 302 | mov byte [esi + CPU_EXCHANGE_ROLE_INFO.State], CPU_SWITCH_STATE_STORED\r |
d94e5f67 JF |
303 | \r |
304 | WaitForOtherStored:\r | |
305 | ; wait until the other CPU finish storing its state\r | |
2fba7d4e | 306 | cmp byte [edi + CPU_EXCHANGE_ROLE_INFO.State], CPU_SWITCH_STATE_STORED\r |
d94e5f67 JF |
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 | |
2fba7d4e | 314 | lgdt [edi + CPU_EXCHANGE_ROLE_INFO.Gdtr]\r |
d94e5f67 JF |
315 | \r |
316 | ; load IDTR value\r | |
2fba7d4e | 317 | lidt [edi + CPU_EXCHANGE_ROLE_INFO.Idtr]\r |
d94e5f67 JF |
318 | \r |
319 | ; load its future StackPointer\r | |
2fba7d4e | 320 | mov esp, [edi + CPU_EXCHANGE_ROLE_INFO.StackPointer]\r |
d94e5f67 JF |
321 | \r |
322 | ; update the other CPU's switch state to LOADED\r | |
2fba7d4e | 323 | mov byte [edi + CPU_EXCHANGE_ROLE_INFO.State], CPU_SWITCH_STATE_LOADED\r |
d94e5f67 JF |
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 | |
2fba7d4e | 328 | cmp byte [esi + CPU_EXCHANGE_ROLE_INFO.State], CPU_SWITCH_STATE_LOADED\r |
d94e5f67 JF |
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 |