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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 | |
da1475e0 | 25 | |
f9d30595 JF |
26 | .code |
27 | ||
da1475e0 JF |
28 | ;------------------------------------------------------------------------------------- |
29 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This | |
30 | ;procedure serializes all the AP processors through an Init sequence. It must be | |
31 | ;noted that APs arrive here very raw...ie: real mode, no stack. | |
32 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC | |
33 | ;IS IN MACHINE CODE. | |
34 | ;------------------------------------------------------------------------------------- | |
35 | RendezvousFunnelProc PROC PUBLIC | |
36 | RendezvousFunnelProcStart:: | |
37 | ; At this point CS = 0x(vv00) and ip= 0x0. | |
38 | ; Save BIST information to ebp firstly | |
39 | db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information | |
40 | ||
41 | db 8ch,0c8h ; mov ax,cs | |
42 | db 8eh,0d8h ; mov ds,ax | |
43 | db 8eh,0c0h ; mov es,ax | |
44 | db 8eh,0d0h ; mov ss,ax | |
45 | db 33h,0c0h ; xor ax,ax | |
46 | db 8eh,0e0h ; mov fs,ax | |
47 | db 8eh,0e8h ; mov gs,ax | |
48 | ||
49 | db 0BEh ; opcode of mov si, mem16 | |
50 | dw BufferStartLocation ; mov si, BufferStartLocation | |
51 | db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si] | |
52 | ||
53 | db 0BFh ; opcode of mov di, mem16 | |
54 | dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation | |
55 | db 66h, 8Bh, 05h ; mov eax,dword ptr [di] | |
56 | db 8Bh, 0F8h ; mov di, ax | |
57 | db 83h, 0EFh,06h ; sub di, 06h | |
58 | db 66h, 03h, 0C3h ; add eax, ebx | |
59 | db 66h, 89h, 05h ; mov dword ptr [di],eax | |
60 | ||
61 | db 0BEh ; opcode of mov si, mem16 | |
62 | dw GdtrLocation ; mov si, GdtrLocation | |
63 | db 66h ; db 66h | |
64 | db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si] | |
65 | ||
66 | db 0BEh | |
67 | dw IdtrLocation ; mov si, IdtrLocation | |
68 | db 66h ; db 66h | |
69 | db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si] | |
70 | ||
71 | db 33h, 0C0h ; xor ax, ax | |
72 | db 8Eh, 0D8h ; mov ds, ax | |
73 | ||
74 | db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0 | |
75 | db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP | |
76 | db 0Fh, 22h, 0C0h ; mov cr0, eax | |
77 | ||
78 | db 66h, 67h, 0EAh ; far jump | |
79 | dd 0h ; 32-bit offset | |
80 | dw PROTECT_MODE_CS ; 16-bit selector | |
81 | ||
82 | Flat32Start:: ; protected mode entry point | |
83 | mov ax, PROTECT_MODE_DS | |
84 | mov ds, ax | |
85 | mov es, ax | |
86 | mov fs, ax | |
87 | mov gs, ax | |
88 | mov ss, ax | |
89 | ||
90 | mov esi, ebx | |
91 | mov edi, esi | |
92 | add edi, LockLocation | |
93 | mov eax, NotVacantFlag | |
94 | ||
95 | TestLock: | |
96 | xchg dword ptr [edi], eax | |
97 | cmp eax, NotVacantFlag | |
98 | jz TestLock | |
99 | ||
100 | mov edi, esi | |
101 | add edi, NumApsExecutingLoction | |
102 | inc dword ptr [edi] | |
103 | mov ebx, dword ptr [edi] | |
104 | ||
105 | ProgramStack: | |
106 | mov edi, esi | |
107 | add edi, StackSizeLocation | |
108 | mov eax, dword ptr [edi] | |
109 | mov edi, esi | |
110 | add edi, StackStartAddressLocation | |
111 | add eax, dword ptr [edi] | |
112 | mov esp, eax | |
113 | mov dword ptr [edi], eax | |
114 | ||
115 | Releaselock: | |
116 | mov eax, VacantFlag | |
117 | mov edi, esi | |
118 | add edi, LockLocation | |
119 | xchg dword ptr [edi], eax | |
120 | ||
121 | CProcedureInvoke: | |
122 | push ebp ; push BIST data at top of AP stack | |
123 | xor ebp, ebp ; clear ebp for call stack trace | |
124 | push ebp | |
125 | mov ebp, esp | |
126 | ||
127 | ||
128 | push ebx ; Push NumApsExecuting | |
129 | mov eax, esi | |
130 | add eax, LockLocation | |
131 | push eax ; push address of exchange info data buffer | |
132 | ||
133 | mov edi, esi | |
134 | add edi, ApProcedureLocation | |
135 | mov eax, dword ptr [edi] | |
136 | ||
137 | call eax ; invoke C function | |
138 | ||
139 | jmp $ ; never reach here | |
140 | ||
141 | RendezvousFunnelProc ENDP | |
142 | RendezvousFunnelProcEnd:: | |
143 | ||
f9d30595 JF |
144 | |
145 | AsmInitializeGdt PROC near C PUBLIC | |
146 | push ebp | |
147 | mov ebp, esp | |
148 | pushad | |
149 | mov edi, [ebp + 8] ; Load GDT register | |
150 | ||
151 | mov ax,cs ; Get the selector data from our code image | |
152 | mov es,ax | |
153 | lgdt FWORD PTR es:[edi] ; and update the GDTR | |
154 | ||
155 | push PROTECT_MODE_CS | |
156 | lea eax, SetCodeSelectorFarJump | |
157 | push eax | |
158 | retf | |
159 | SetCodeSelectorFarJump: | |
160 | mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too | |
161 | mov ds, ax | |
162 | mov es, ax | |
163 | mov fs, ax | |
164 | mov gs, ax | |
165 | mov ss, ax | |
166 | ||
167 | popad | |
168 | pop ebp | |
169 | ret | |
170 | AsmInitializeGdt ENDP | |
171 | ||
172 | END |