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78cf66ee | 1 | ;------------------------------------------------------------------------------ ;\r |
e21e355e | 2 | ; Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>\r |
78cf66ee LG |
3 | ; This program and the accompanying materials\r |
4 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
5 | ; which accompanies this distribution. The full text of the license may be found at\r | |
6 | ; http://opensource.org/licenses/bsd-license.php.\r | |
7 | ;\r | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
10 | ;\r | |
11 | ; Module Name:\r | |
12 | ;\r | |
13 | ; MpFuncs.nasm\r | |
14 | ;\r | |
15 | ; Abstract:\r | |
16 | ;\r | |
17 | ; This is the assembly code for Multi-processor S3 support\r | |
18 | ;\r | |
19 | ;-------------------------------------------------------------------------------\r | |
20 | \r | |
78cf66ee LG |
21 | %define VacantFlag 0x0\r |
22 | %define NotVacantFlag 0xff\r | |
23 | \r | |
24 | %define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
25 | %define StackStartAddressLocation LockLocation + 0x8\r | |
26 | %define StackSizeLocation LockLocation + 0x10\r | |
27 | %define CProcedureLocation LockLocation + 0x18\r | |
28 | %define GdtrLocation LockLocation + 0x20\r | |
29 | %define IdtrLocation LockLocation + 0x2A\r | |
30 | %define BufferStartLocation LockLocation + 0x34\r | |
31 | %define Cr3OffsetLocation LockLocation + 0x38\r | |
e21e355e | 32 | %define InitializeFloatingPointUnitsAddress LockLocation + 0x3C\r |
78cf66ee LG |
33 | \r |
34 | ;-------------------------------------------------------------------------------------\r | |
35 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This\r | |
36 | ;procedure serializes all the AP processors through an Init sequence. It must be\r | |
37 | ;noted that APs arrive here very raw...ie: real mode, no stack.\r | |
38 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC\r | |
39 | ;IS IN MACHINE CODE.\r | |
40 | ;-------------------------------------------------------------------------------------\r | |
41 | ;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);\r | |
42 | \r | |
43 | ;text SEGMENT\r | |
44 | DEFAULT REL\r | |
45 | SECTION .text\r | |
46 | \r | |
e1f0eed1 | 47 | BITS 16\r |
78cf66ee LG |
48 | global ASM_PFX(RendezvousFunnelProc)\r |
49 | ASM_PFX(RendezvousFunnelProc):\r | |
50 | RendezvousFunnelProcStart:\r | |
51 | \r | |
52 | ; At this point CS = 0x(vv00) and ip= 0x0.\r | |
53 | \r | |
e1f0eed1 LG |
54 | mov ax, cs\r |
55 | mov ds, ax\r | |
56 | mov es, ax\r | |
57 | mov ss, ax\r | |
58 | xor ax, ax\r | |
59 | mov fs, ax\r | |
60 | mov gs, ax\r | |
78cf66ee LG |
61 | \r |
62 | flat32Start:\r | |
63 | \r | |
e1f0eed1 LG |
64 | mov si, BufferStartLocation\r |
65 | mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer\r | |
78cf66ee | 66 | \r |
e1f0eed1 LG |
67 | mov si, Cr3OffsetLocation\r |
68 | mov ecx,dword [si] ; ECX is keeping the value of CR3\r | |
78cf66ee | 69 | \r |
e1f0eed1 LG |
70 | mov si, GdtrLocation\r |
71 | o32 lgdt [cs:si]\r | |
78cf66ee | 72 | \r |
e1f0eed1 LG |
73 | mov si, IdtrLocation\r |
74 | o32 lidt [cs:si]\r | |
78cf66ee | 75 | \r |
e1f0eed1 LG |
76 | xor ax, ax\r |
77 | mov ds, ax\r | |
78cf66ee | 78 | \r |
e1f0eed1 LG |
79 | mov eax, cr0 ; Get control register 0\r |
80 | or eax, 0x000000001 ; Set PE bit (bit #0)\r | |
81 | mov cr0, eax\r | |
78cf66ee LG |
82 | \r |
83 | FLAT32_JUMP:\r | |
84 | \r | |
e1f0eed1 | 85 | a32 jmp dword 0x20:0x0\r |
78cf66ee | 86 | \r |
e1f0eed1 | 87 | BITS 32\r |
78cf66ee LG |
88 | PMODE_ENTRY: ; protected mode entry point\r |
89 | \r | |
e1f0eed1 LG |
90 | mov ax, 0x18\r |
91 | o16 mov ds, ax\r | |
92 | o16 mov es, ax\r | |
93 | o16 mov fs, ax\r | |
94 | o16 mov gs, ax\r | |
95 | o16 mov ss, ax ; Flat mode setup.\r | |
78cf66ee | 96 | \r |
e1f0eed1 LG |
97 | mov eax, cr4\r |
98 | bts eax, 5\r | |
99 | mov cr4, eax\r | |
78cf66ee | 100 | \r |
e1f0eed1 | 101 | mov cr3, ecx\r |
78cf66ee | 102 | \r |
e1f0eed1 | 103 | mov esi, edx ; Save wakeup buffer address\r |
78cf66ee | 104 | \r |
e1f0eed1 LG |
105 | mov ecx, 0xc0000080 ; EFER MSR number.\r |
106 | rdmsr ; Read EFER.\r | |
107 | bts eax, 8 ; Set LME=1.\r | |
108 | wrmsr ; Write EFER.\r | |
78cf66ee | 109 | \r |
e1f0eed1 LG |
110 | mov eax, cr0 ; Read CR0.\r |
111 | bts eax, 31 ; Set PG=1.\r | |
112 | mov cr0, eax ; Write CR0.\r | |
78cf66ee LG |
113 | \r |
114 | LONG_JUMP:\r | |
115 | \r | |
e1f0eed1 | 116 | a16 jmp dword 0x38:0x0\r |
78cf66ee | 117 | \r |
e1f0eed1 | 118 | BITS 64\r |
78cf66ee LG |
119 | LongModeStart:\r |
120 | \r | |
121 | mov ax, 0x30\r | |
122 | o16 mov ds, ax\r | |
123 | o16 mov es, ax\r | |
124 | o16 mov ss, ax\r | |
125 | \r | |
126 | mov edi, esi\r | |
127 | add edi, LockLocation\r | |
128 | mov al, NotVacantFlag\r | |
129 | TestLock:\r | |
130 | xchg byte [edi], al\r | |
131 | cmp al, NotVacantFlag\r | |
132 | jz TestLock\r | |
133 | \r | |
134 | ProgramStack:\r | |
135 | \r | |
136 | mov edi, esi\r | |
137 | add edi, StackSizeLocation\r | |
138 | mov rax, qword [edi]\r | |
139 | mov edi, esi\r | |
140 | add edi, StackStartAddressLocation\r | |
141 | add rax, qword [edi]\r | |
142 | mov rsp, rax\r | |
143 | mov qword [edi], rax\r | |
144 | \r | |
145 | Releaselock:\r | |
146 | \r | |
147 | mov al, VacantFlag\r | |
148 | mov edi, esi\r | |
149 | add edi, LockLocation\r | |
150 | xchg byte [edi], al\r | |
151 | \r | |
152 | ;\r | |
153 | ; Call assembly function to initialize FPU.\r | |
154 | ;\r | |
e21e355e | 155 | mov rax, qword [esi + InitializeFloatingPointUnitsAddress]\r |
78cf66ee LG |
156 | sub rsp, 0x20\r |
157 | call rax\r | |
158 | add rsp, 0x20\r | |
159 | \r | |
160 | ;\r | |
161 | ; Call C Function\r | |
162 | ;\r | |
163 | mov edi, esi\r | |
164 | add edi, CProcedureLocation\r | |
165 | mov rax, qword [edi]\r | |
166 | \r | |
167 | test rax, rax\r | |
168 | jz GoToSleep\r | |
169 | \r | |
170 | sub rsp, 0x20\r | |
171 | call rax\r | |
172 | add rsp, 0x20\r | |
173 | \r | |
174 | GoToSleep:\r | |
175 | cli\r | |
176 | hlt\r | |
177 | jmp $-2\r | |
178 | \r | |
179 | RendezvousFunnelProcEnd:\r | |
180 | \r | |
181 | ;-------------------------------------------------------------------------------------\r | |
182 | ; AsmGetAddressMap (&AddressMap);\r | |
183 | ;-------------------------------------------------------------------------------------\r | |
184 | ; comments here for definition of address map\r | |
185 | global ASM_PFX(AsmGetAddressMap)\r | |
186 | ASM_PFX(AsmGetAddressMap):\r | |
e21e355e | 187 | lea rax, [RendezvousFunnelProcStart]\r |
78cf66ee LG |
188 | mov qword [rcx], rax\r |
189 | mov qword [rcx+0x8], PMODE_ENTRY - RendezvousFunnelProcStart\r | |
190 | mov qword [rcx+0x10], FLAT32_JUMP - RendezvousFunnelProcStart\r | |
191 | mov qword [rcx+0x18], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
192 | mov qword [rcx+0x20], LongModeStart - RendezvousFunnelProcStart\r | |
193 | mov qword [rcx+0x28], LONG_JUMP - RendezvousFunnelProcStart\r | |
194 | ret\r | |
195 | \r |