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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 | include MpEqu.inc | |
22 | .code | |
34ff8715 JF |
23 | ;------------------------------------------------------------------------------------- |
24 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This | |
25 | ;procedure serializes all the AP processors through an Init sequence. It must be | |
26 | ;noted that APs arrive here very raw...ie: real mode, no stack. | |
27 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC | |
28 | ;IS IN MACHINE CODE. | |
29 | ;------------------------------------------------------------------------------------- | |
30 | RendezvousFunnelProc PROC PUBLIC | |
31 | RendezvousFunnelProcStart:: | |
32 | ; At this point CS = 0x(vv00) and ip= 0x0. | |
33 | ; Save BIST information to ebp firstly | |
34 | db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information | |
35 | ||
36 | db 8ch,0c8h ; mov ax,cs | |
37 | db 8eh,0d8h ; mov ds,ax | |
38 | db 8eh,0c0h ; mov es,ax | |
39 | db 8eh,0d0h ; mov ss,ax | |
40 | db 33h,0c0h ; xor ax,ax | |
41 | db 8eh,0e0h ; mov fs,ax | |
42 | db 8eh,0e8h ; mov gs,ax | |
43 | ||
44 | db 0BEh ; opcode of mov si, mem16 | |
45 | dw BufferStartLocation ; mov si, BufferStartLocation | |
46 | db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si] | |
47 | ||
48 | db 0BFh ; opcode of mov di, mem16 | |
49 | dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation | |
50 | db 66h, 8Bh, 05h ; mov eax,dword ptr [di] | |
51 | db 8Bh, 0F8h ; mov di, ax | |
52 | db 83h, 0EFh,06h ; sub di, 06h | |
53 | db 66h, 03h, 0C3h ; add eax, ebx | |
54 | db 66h, 89h, 05h ; mov dword ptr [di],eax | |
55 | ||
56 | db 0BFh ; opcode of mov di, mem16 | |
57 | dw LmodeOffsetLocation ; mov di, LmodeOffsetLocation | |
58 | db 66h, 8Bh, 05h ; mov eax,dword ptr [di] | |
59 | db 8Bh, 0F8h ; mov di, ax | |
60 | db 83h, 0EFh,06h ; sub di, 06h | |
61 | db 66h, 03h, 0C3h ; add eax, ebx | |
62 | db 66h, 89h, 05h ; mov dword ptr [di],eax | |
63 | ||
64 | db 0BEh | |
65 | dw Cr3Location ; mov si, Cr3Location | |
66 | db 66h, 8Bh, 0Ch ; mov ecx,dword ptr [si] ; ECX is keeping the value of CR3 | |
67 | ||
68 | db 0BEh ; opcode of mov si, mem16 | |
69 | dw GdtrLocation ; mov si, GdtrLocation | |
70 | db 66h ; db 66h | |
71 | db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si] | |
72 | ||
73 | db 0BEh | |
74 | dw IdtrLocation ; mov si, IdtrLocation | |
75 | db 66h ; db 66h | |
76 | db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si] | |
77 | ||
78 | db 33h, 0C0h ; xor ax, ax | |
79 | db 8Eh, 0D8h ; mov ds, ax | |
80 | ||
81 | db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0 | |
82 | db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP | |
83 | db 0Fh, 22h, 0C0h ; mov cr0, eax | |
84 | ||
85 | db 66h, 67h, 0EAh ; far jump | |
86 | dd 0h ; 32-bit offset | |
87 | dw PROTECT_MODE_CS ; 16-bit selector | |
88 | ||
89 | Flat32Start:: ; protected mode entry point | |
90 | mov ax, PROTECT_MODE_DS | |
91 | mov ds, ax | |
92 | mov es, ax | |
93 | mov fs, ax | |
94 | mov gs, ax | |
95 | mov ss, ax | |
96 | ||
97 | db 0Fh, 20h, 0E0h ; mov eax, cr4 | |
98 | db 0Fh, 0BAh, 0E8h, 05h ; bts eax, 5 | |
99 | db 0Fh, 22h, 0E0h ; mov cr4, eax | |
100 | ||
101 | db 0Fh, 22h, 0D9h ; mov cr3, ecx | |
102 | ||
103 | db 0B9h | |
104 | dd 0C0000080h ; mov ecx, 0c0000080h ; EFER MSR number. | |
105 | db 0Fh, 32h ; rdmsr ; Read EFER. | |
106 | db 0Fh, 0BAh, 0E8h, 08h ; bts eax, 8 ; Set LME=1. | |
107 | db 0Fh, 30h ; wrmsr ; Write EFER. | |
108 | ||
109 | db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Read CR0. | |
110 | db 0Fh, 0BAh, 0E8h, 1Fh ; bts eax, 31 ; Set PG=1. | |
111 | db 0Fh, 22h, 0C0h ; mov cr0, eax ; Write CR0. | |
112 | ||
113 | LONG_JUMP: | |
114 | db 67h, 0EAh ; far jump | |
115 | dd 0h ; 32-bit offset | |
116 | dw LONG_MODE_CS ; 16-bit selector | |
117 | ||
118 | LongModeStart:: | |
119 | mov ax, LONG_MODE_DS | |
120 | mov ds, ax | |
121 | mov es, ax | |
122 | mov ss, ax | |
123 | ||
124 | mov esi, ebx | |
125 | mov edi, esi | |
126 | add edi, LockLocation | |
127 | mov rax, NotVacantFlag | |
128 | ||
129 | TestLock: | |
130 | xchg qword ptr [edi], rax | |
131 | cmp rax, NotVacantFlag | |
132 | jz TestLock | |
133 | ||
134 | mov edi, esi | |
135 | add edi, NumApsExecutingLoction | |
136 | inc dword ptr [edi] | |
137 | mov ebx, dword ptr [edi] | |
138 | ||
139 | ProgramStack: | |
140 | mov edi, esi | |
141 | add edi, StackSizeLocation | |
142 | mov rax, qword ptr [edi] | |
143 | mov edi, esi | |
144 | add edi, StackStartAddressLocation | |
145 | add rax, qword ptr [edi] | |
146 | mov rsp, rax | |
147 | mov qword ptr [edi], rax | |
148 | ||
149 | Releaselock: | |
150 | mov rax, VacantFlag | |
151 | mov edi, esi | |
152 | add edi, LockLocation | |
153 | xchg qword ptr [edi], rax | |
154 | ||
155 | CProcedureInvoke: | |
156 | push rbp ; push BIST data | |
157 | xor rbp, rbp ; clear ebp for call stack trace | |
158 | push rbp | |
159 | mov rbp, rsp | |
160 | ||
161 | ||
162 | mov edx, ebx ; edx is NumApsExecuting | |
163 | mov ecx, esi | |
164 | add ecx, LockLocation ; rcx is address of exchange info data buffer | |
165 | ||
166 | mov edi, esi | |
167 | add edi, ApProcedureLocation | |
168 | mov rax, qword ptr [edi] | |
169 | ||
170 | sub rsp, 20h | |
171 | call rax ; invoke C function | |
172 | add rsp, 20h | |
173 | jmp $ | |
174 | ||
175 | RendezvousFunnelProc ENDP | |
176 | RendezvousFunnelProcEnd:: | |
f9d30595 JF |
177 | |
178 | ||
179 | AsmInitializeGdt PROC | |
180 | push rbp | |
181 | mov rbp, rsp | |
182 | ||
183 | lgdt fword PTR [rcx] ; update the GDTR | |
184 | ||
185 | sub rsp, 0x10 | |
186 | lea rax, SetCodeSelectorFarJump | |
187 | mov [rsp], rax | |
188 | mov rdx, LONG_MODE_CS | |
189 | mov [rsp + 4], dx ; get new CS | |
190 | jmp fword ptr [rsp] | |
191 | SetCodeSelectorFarJump: | |
192 | add rsp, 0x10 | |
193 | ||
194 | mov rax, LONG_MODE_DS ; get new DS | |
195 | mov ds, ax | |
196 | mov es, ax | |
197 | mov fs, ax | |
198 | mov gs, ax | |
199 | mov ss, ax | |
200 | ||
201 | pop rbp | |
202 | ret | |
203 | AsmInitializeGdt ENDP | |
204 | ||
205 | END |