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6997711e LG |
1 | ;------------------------------------------------------------------------------ ;\r |
2 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
0acd8697 | 3 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6997711e LG |
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 Multi-processor S3 support\r | |
12 | ;\r | |
13 | ;-------------------------------------------------------------------------------\r | |
14 | \r | |
15 | SECTION .text\r | |
16 | \r | |
17 | extern ASM_PFX(InitializeFloatingPointUnits)\r | |
18 | \r | |
19 | %define VacantFlag 0x0\r | |
20 | %define NotVacantFlag 0xff\r | |
21 | \r | |
22 | %define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
23 | %define StackStart LockLocation + 0x4\r | |
24 | %define StackSize LockLocation + 0x8\r | |
25 | %define RendezvousProc LockLocation + 0xC\r | |
26 | %define GdtrProfile LockLocation + 0x10\r | |
27 | %define IdtrProfile LockLocation + 0x16\r | |
28 | %define BufferStart LockLocation + 0x1C\r | |
29 | \r | |
30 | ;-------------------------------------------------------------------------------------\r | |
31 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This\r | |
32 | ;procedure serializes all the AP processors through an Init sequence. It must be\r | |
33 | ;noted that APs arrive here very raw...ie: real mode, no stack.\r | |
34 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC\r | |
35 | ;IS IN MACHINE CODE.\r | |
36 | ;-------------------------------------------------------------------------------------\r | |
37 | ;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);\r | |
38 | \r | |
55c6d546 | 39 | BITS 16\r |
6997711e LG |
40 | global ASM_PFX(RendezvousFunnelProc)\r |
41 | ASM_PFX(RendezvousFunnelProc):\r | |
42 | RendezvousFunnelProcStart:\r | |
43 | \r | |
44 | ; At this point CS = 0x(vv00) and ip= 0x0.\r | |
45 | \r | |
55c6d546 LG |
46 | mov ax, cs\r |
47 | mov ds, ax\r | |
48 | mov es, ax\r | |
49 | mov ss, ax\r | |
50 | xor ax, ax\r | |
51 | mov fs, ax\r | |
52 | mov gs, ax\r | |
6997711e LG |
53 | \r |
54 | flat32Start:\r | |
55 | \r | |
55c6d546 LG |
56 | mov si, BufferStart\r |
57 | mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer\r | |
6997711e | 58 | \r |
55c6d546 LG |
59 | mov si, GdtrProfile\r |
60 | o32 lgdt [cs:si]\r | |
6997711e | 61 | \r |
55c6d546 LG |
62 | mov si, IdtrProfile\r |
63 | o32 lidt [cs:si]\r | |
6997711e | 64 | \r |
55c6d546 LG |
65 | xor ax, ax\r |
66 | mov ds, ax\r | |
6997711e | 67 | \r |
55c6d546 LG |
68 | mov eax, cr0 ; Get control register 0\r |
69 | or eax, 0x000000001 ; Set PE bit (bit #0)\r | |
70 | mov cr0, eax\r | |
6997711e LG |
71 | \r |
72 | FLAT32_JUMP:\r | |
73 | \r | |
55c6d546 | 74 | a32 jmp dword 0x20:0x0\r |
6997711e | 75 | \r |
55c6d546 | 76 | BITS 32\r |
6997711e LG |
77 | PMODE_ENTRY: ; protected mode entry point\r |
78 | \r | |
79 | mov ax, 0x8\r | |
80 | o16 mov ds, ax\r | |
81 | o16 mov es, ax\r | |
82 | o16 mov fs, ax\r | |
83 | o16 mov gs, ax\r | |
84 | o16 mov ss, ax ; Flat mode setup.\r | |
85 | \r | |
86 | mov esi, edx\r | |
87 | \r | |
88 | mov edi, esi\r | |
89 | add edi, LockLocation\r | |
90 | mov al, NotVacantFlag\r | |
91 | TestLock:\r | |
92 | xchg byte [edi], al\r | |
93 | cmp al, NotVacantFlag\r | |
94 | jz TestLock\r | |
95 | \r | |
96 | ProgramStack:\r | |
97 | \r | |
98 | mov edi, esi\r | |
99 | add edi, StackSize\r | |
100 | mov eax, dword [edi]\r | |
101 | mov edi, esi\r | |
102 | add edi, StackStart\r | |
103 | add eax, dword [edi]\r | |
104 | mov esp, eax\r | |
105 | mov dword [edi], eax\r | |
106 | \r | |
107 | Releaselock:\r | |
108 | \r | |
109 | mov al, VacantFlag\r | |
110 | mov edi, esi\r | |
111 | add edi, LockLocation\r | |
112 | xchg byte [edi], al\r | |
113 | \r | |
114 | ;\r | |
115 | ; Call assembly function to initialize FPU.\r | |
116 | ;\r | |
117 | mov ebx, ASM_PFX(InitializeFloatingPointUnits)\r | |
118 | call ebx\r | |
119 | ;\r | |
120 | ; Call C Function\r | |
121 | ;\r | |
122 | mov edi, esi\r | |
123 | add edi, RendezvousProc\r | |
124 | mov eax, dword [edi]\r | |
125 | \r | |
126 | test eax, eax\r | |
127 | jz GoToSleep\r | |
128 | call eax ; Call C function\r | |
129 | \r | |
130 | GoToSleep:\r | |
131 | cli\r | |
132 | hlt\r | |
133 | jmp $-2\r | |
134 | \r | |
135 | RendezvousFunnelProcEnd:\r | |
136 | ;-------------------------------------------------------------------------------------\r | |
137 | ; AsmGetAddressMap (&AddressMap);\r | |
138 | ;-------------------------------------------------------------------------------------\r | |
139 | global ASM_PFX(AsmGetAddressMap)\r | |
140 | ASM_PFX(AsmGetAddressMap):\r | |
141 | \r | |
142 | pushad\r | |
143 | mov ebp,esp\r | |
144 | \r | |
145 | mov ebx, dword [ebp+0x24]\r | |
146 | mov dword [ebx], RendezvousFunnelProcStart\r | |
147 | mov dword [ebx+0x4], PMODE_ENTRY - RendezvousFunnelProcStart\r | |
148 | mov dword [ebx+0x8], FLAT32_JUMP - RendezvousFunnelProcStart\r | |
149 | mov dword [ebx+0xc], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
150 | \r | |
151 | popad\r | |
152 | ret\r | |
153 | \r |