1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
;------------------------------------------------------------------------------
; X64 assembly file for AP startup vector.
;
; Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
;------------------------------------------------------------------------------
.code
include AsmInclude.inc
;-------------------------------------------------------------------------------------
;-------------------------------------------------------------------------------------
;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
;procedure serializes all the AP processors through an Init sequence. It must be
;noted that APs arrive here very raw...ie: real mode, no stack.
;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
;IS IN MACHINE CODE.
;-------------------------------------------------------------------------------------
;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
RendezvousFunnelProc PROC PUBLIC
RendezvousFunnelProcStart::
; At this point CS = 0x(vv00) and ip= 0x0.
db 8ch, 0c8h ; mov ax, cs
db 8eh, 0d8h ; mov ds, ax
db 8eh, 0c0h ; mov es, ax
db 8eh, 0d0h ; mov ss, ax
db 33h, 0c0h ; xor ax, ax
db 8eh, 0e0h ; mov fs, ax
db 8eh, 0e8h ; mov gs, ax
; Switch to flat mode.
db 0BEh
dw BufferStartLocation ; mov si, BufferStartLocation
db 66h, 8Bh, 14h ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
db 0BEh
dw Cr3OffsetLocation ; mov si, Cr3Location
db 66h, 8Bh, 0Ch ; mov ecx,dword ptr [si] ; ECX is keeping the value of CR3
db 0BEh
dw GdtrLocation ; mov si, GdtrProfile
db 66h ; db 66h
db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
db 0BEh
dw IdtrLocation ; mov si, IdtrProfile
db 66h ; db 66h
db 2Eh, 0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
db 33h, 0C0h ; xor ax, ax
db 8Eh, 0D8h ; mov ds, ax
db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Get control register 0
db 66h, 83h, 0C8h, 01h ; or eax, 000000001h ; Set PE bit (bit #0)
db 0Fh, 22h, 0C0h ; mov cr0, eax
FLAT32_JUMP::
db 66h, 67h, 0EAh ; far jump
dd 0h ; 32-bit offset
dw 20h ; 16-bit selector
ProtectedModeStart::
db 66h, 0B8h, 18h, 00h ; mov ax, 18h
db 66h, 8Eh, 0D8h ; mov ds, ax
db 66h, 8Eh, 0C0h ; mov es, ax
db 66h, 8Eh, 0E0h ; mov fs, ax
db 66h, 8Eh, 0E8h ; mov gs, ax
db 66h, 8Eh, 0D0h ; mov ss, ax ; Flat mode setup.
db 0Fh, 20h, 0E0h ; mov eax, cr4
db 0Fh, 0BAh, 0E8h, 05h ; bts eax, 5
db 0Fh, 22h, 0E0h ; mov cr4, eax
db 0Fh, 22h, 0D9h ; mov cr3, ecx
db 8Bh, 0F2h ; mov esi, edx ; Save wakeup buffer address
db 0B9h
dd 0C0000080h ; mov ecx, 0c0000080h ; EFER MSR number.
db 0Fh, 32h ; rdmsr ; Read EFER.
db 0Fh, 0BAh, 0E8h, 08h ; bts eax, 8 ; Set LME=1.
db 0Fh, 30h ; wrmsr ; Write EFER.
db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Read CR0.
db 0Fh, 0BAh, 0E8h, 1Fh ; bts eax, 31 ; Set PG=1.
db 0Fh, 22h, 0C0h ; mov cr0, eax ; Write CR0.
LONG_JUMP::
db 67h, 0EAh ; far jump
dd 0h ; 32-bit offset
dw 38h ; 16-bit selector
LongModeStart::
mov ax, 30h
mov ds, ax
mov es, ax
mov ss, ax
;
; ProgramStack
;
mov ecx, 1bh ; Read IA32_APIC_BASE MSR
rdmsr
bt eax, 10 ; Check for x2apic mode
jnc LegacyApicMode
mov ecx, 802h ; Read APIC_ID
rdmsr
mov ebx, eax ; ebx == apicid
jmp GetCpuNumber
LegacyApicMode::
and eax, 0fffff000h
add eax, 20h
mov ebx, dword ptr [eax]
shr ebx, 24 ; ebx == apicid
GetCpuNumber::
xor rcx, rcx
mov edi, esi
add edi, ProcessorNumberLocation
mov ecx, dword ptr [edi + 4 * ebx] ; RCX = CpuNumber
mov edi, esi
add edi, StackSizeLocation
mov rax, qword ptr [edi]
inc rcx
mul rcx ; RAX = StackSize * (CpuNumber + 1)
mov edi, esi
add edi, StackStartAddressLocation
mov rbx, qword ptr [edi]
add rax, rbx ; RAX = StackStart + StackSize * (CpuNumber + 1)
mov rsp, rax
;
; Call C Function
;
mov edi, esi
add edi, CProcedureLocation
mov rax, qword ptr [edi]
test rax, rax
jz GoToSleep
sub rsp, 20h
call rax
add rsp, 20h
GoToSleep::
cli
hlt
jmp $-2
RendezvousFunnelProc ENDP
RendezvousFunnelProcEnd::
;-------------------------------------------------------------------------------------
; AsmGetAddressMap (&AddressMap);
;-------------------------------------------------------------------------------------
AsmGetAddressMap PROC
mov rax, offset RendezvousFunnelProcStart
mov qword ptr [rcx], rax
mov qword ptr [rcx+8h], ProtectedModeStart - RendezvousFunnelProcStart
mov qword ptr [rcx+10h], FLAT32_JUMP - RendezvousFunnelProcStart
mov qword ptr [rcx+18h], LongModeStart - RendezvousFunnelProcStart
mov qword ptr [rcx+20h], LONG_JUMP - RendezvousFunnelProcStart
mov qword ptr [rcx+28h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
ret
AsmGetAddressMap ENDP
END
|