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
|
;------------------------------------------------------------------------------ ;
; Copyright (c) 2016, 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.
;
; Module Name:
;
; MpFuncs.nasm
;
; Abstract:
;
; This is the assembly code for Multi-processor S3 support
;
;-------------------------------------------------------------------------------
SECTION .text
extern ASM_PFX(InitializeFloatingPointUnits)
%define VacantFlag 0x0
%define NotVacantFlag 0xff
%define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart
%define StackStart LockLocation + 0x4
%define StackSize LockLocation + 0x8
%define RendezvousProc LockLocation + 0xC
%define GdtrProfile LockLocation + 0x10
%define IdtrProfile LockLocation + 0x16
%define BufferStart LockLocation + 0x1C
;-------------------------------------------------------------------------------------
;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);
global ASM_PFX(RendezvousFunnelProc)
ASM_PFX(RendezvousFunnelProc):
RendezvousFunnelProcStart:
; At this point CS = 0x(vv00) and ip= 0x0.
db 0x8c, 0xc8 ; mov ax, cs
db 0x8e, 0xd8 ; mov ds, ax
db 0x8e, 0xc0 ; mov es, ax
db 0x8e, 0xd0 ; mov ss, ax
db 0x33, 0xc0 ; xor ax, ax
db 0x8e, 0xe0 ; mov fs, ax
db 0x8e, 0xe8 ; mov gs, ax
flat32Start:
db 0xBE
dw BufferStart ; mov si, BufferStart
db 0x66, 0x8B, 0x14 ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
db 0xBE
dw GdtrProfile ; mov si, GdtrProfile
db 0x66 ; db 66h
db 0x2E, 0xF, 0x1, 0x14 ; lgdt fword ptr cs:[si]
db 0xBE
dw IdtrProfile ; mov si, IdtrProfile
db 0x66 ; db 66h
db 0x2E, 0xF, 0x1, 0x1C ; lidt fword ptr cs:[si]
db 0x33, 0xC0 ; xor ax, ax
db 0x8E, 0xD8 ; mov ds, ax
db 0xF, 0x20, 0xC0 ; mov eax, cr0 ; Get control register 0
db 0x66, 0x83, 0xC8, 0x1 ; or eax, 000000001h ; Set PE bit (bit #0)
db 0xF, 0x22, 0xC0 ; mov cr0, eax
FLAT32_JUMP:
db 0x66, 0x67, 0xEA ; far jump
dd 0x0 ; 32-bit offset
dw 0x20 ; 16-bit selector
PMODE_ENTRY: ; protected mode entry point
mov ax, 0x8
o16 mov ds, ax
o16 mov es, ax
o16 mov fs, ax
o16 mov gs, ax
o16 mov ss, ax ; Flat mode setup.
mov esi, edx
mov edi, esi
add edi, LockLocation
mov al, NotVacantFlag
TestLock:
xchg byte [edi], al
cmp al, NotVacantFlag
jz TestLock
ProgramStack:
mov edi, esi
add edi, StackSize
mov eax, dword [edi]
mov edi, esi
add edi, StackStart
add eax, dword [edi]
mov esp, eax
mov dword [edi], eax
Releaselock:
mov al, VacantFlag
mov edi, esi
add edi, LockLocation
xchg byte [edi], al
;
; Call assembly function to initialize FPU.
;
mov ebx, ASM_PFX(InitializeFloatingPointUnits)
call ebx
;
; Call C Function
;
mov edi, esi
add edi, RendezvousProc
mov eax, dword [edi]
test eax, eax
jz GoToSleep
call eax ; Call C function
GoToSleep:
cli
hlt
jmp $-2
RendezvousFunnelProcEnd:
;-------------------------------------------------------------------------------------
; AsmGetAddressMap (&AddressMap);
;-------------------------------------------------------------------------------------
global ASM_PFX(AsmGetAddressMap)
ASM_PFX(AsmGetAddressMap):
pushad
mov ebp,esp
mov ebx, dword [ebp+0x24]
mov dword [ebx], RendezvousFunnelProcStart
mov dword [ebx+0x4], PMODE_ENTRY - RendezvousFunnelProcStart
mov dword [ebx+0x8], FLAT32_JUMP - RendezvousFunnelProcStart
mov dword [ebx+0xc], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
popad
ret
|
