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78cf66ee LG |
1 | ;------------------------------------------------------------------------------ ;\r |
2 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
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 | |
21 | extern ASM_PFX(InitializeFloatingPointUnits)\r | |
22 | \r | |
23 | %define VacantFlag 0x0\r | |
24 | %define NotVacantFlag 0xff\r | |
25 | \r | |
26 | %define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
27 | %define StackStartAddressLocation LockLocation + 0x8\r | |
28 | %define StackSizeLocation LockLocation + 0x10\r | |
29 | %define CProcedureLocation LockLocation + 0x18\r | |
30 | %define GdtrLocation LockLocation + 0x20\r | |
31 | %define IdtrLocation LockLocation + 0x2A\r | |
32 | %define BufferStartLocation LockLocation + 0x34\r | |
33 | %define Cr3OffsetLocation LockLocation + 0x38\r | |
34 | \r | |
35 | ;-------------------------------------------------------------------------------------\r | |
36 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This\r | |
37 | ;procedure serializes all the AP processors through an Init sequence. It must be\r | |
38 | ;noted that APs arrive here very raw...ie: real mode, no stack.\r | |
39 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC\r | |
40 | ;IS IN MACHINE CODE.\r | |
41 | ;-------------------------------------------------------------------------------------\r | |
42 | ;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);\r | |
43 | \r | |
44 | ;text SEGMENT\r | |
45 | DEFAULT REL\r | |
46 | SECTION .text\r | |
47 | \r | |
e1f0eed1 | 48 | BITS 16\r |
78cf66ee LG |
49 | global ASM_PFX(RendezvousFunnelProc)\r |
50 | ASM_PFX(RendezvousFunnelProc):\r | |
51 | RendezvousFunnelProcStart:\r | |
52 | \r | |
53 | ; At this point CS = 0x(vv00) and ip= 0x0.\r | |
54 | \r | |
e1f0eed1 LG |
55 | mov ax, cs\r |
56 | mov ds, ax\r | |
57 | mov es, ax\r | |
58 | mov ss, ax\r | |
59 | xor ax, ax\r | |
60 | mov fs, ax\r | |
61 | mov gs, ax\r | |
78cf66ee LG |
62 | \r |
63 | flat32Start:\r | |
64 | \r | |
e1f0eed1 LG |
65 | mov si, BufferStartLocation\r |
66 | mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer\r | |
78cf66ee | 67 | \r |
e1f0eed1 LG |
68 | mov si, Cr3OffsetLocation\r |
69 | mov ecx,dword [si] ; ECX is keeping the value of CR3\r | |
78cf66ee | 70 | \r |
e1f0eed1 LG |
71 | mov si, GdtrLocation\r |
72 | o32 lgdt [cs:si]\r | |
78cf66ee | 73 | \r |
e1f0eed1 LG |
74 | mov si, IdtrLocation\r |
75 | o32 lidt [cs:si]\r | |
78cf66ee | 76 | \r |
e1f0eed1 LG |
77 | xor ax, ax\r |
78 | mov ds, ax\r | |
78cf66ee | 79 | \r |
e1f0eed1 LG |
80 | mov eax, cr0 ; Get control register 0\r |
81 | or eax, 0x000000001 ; Set PE bit (bit #0)\r | |
82 | mov cr0, eax\r | |
78cf66ee LG |
83 | \r |
84 | FLAT32_JUMP:\r | |
85 | \r | |
e1f0eed1 | 86 | a32 jmp dword 0x20:0x0\r |
78cf66ee | 87 | \r |
e1f0eed1 | 88 | BITS 32\r |
78cf66ee LG |
89 | PMODE_ENTRY: ; protected mode entry point\r |
90 | \r | |
e1f0eed1 LG |
91 | mov ax, 0x18\r |
92 | o16 mov ds, ax\r | |
93 | o16 mov es, ax\r | |
94 | o16 mov fs, ax\r | |
95 | o16 mov gs, ax\r | |
96 | o16 mov ss, ax ; Flat mode setup.\r | |
78cf66ee | 97 | \r |
e1f0eed1 LG |
98 | mov eax, cr4\r |
99 | bts eax, 5\r | |
100 | mov cr4, eax\r | |
78cf66ee | 101 | \r |
e1f0eed1 | 102 | mov cr3, ecx\r |
78cf66ee | 103 | \r |
e1f0eed1 | 104 | mov esi, edx ; Save wakeup buffer address\r |
78cf66ee | 105 | \r |
e1f0eed1 LG |
106 | mov ecx, 0xc0000080 ; EFER MSR number.\r |
107 | rdmsr ; Read EFER.\r | |
108 | bts eax, 8 ; Set LME=1.\r | |
109 | wrmsr ; Write EFER.\r | |
78cf66ee | 110 | \r |
e1f0eed1 LG |
111 | mov eax, cr0 ; Read CR0.\r |
112 | bts eax, 31 ; Set PG=1.\r | |
113 | mov cr0, eax ; Write CR0.\r | |
78cf66ee LG |
114 | \r |
115 | LONG_JUMP:\r | |
116 | \r | |
e1f0eed1 | 117 | a16 jmp dword 0x38:0x0\r |
78cf66ee | 118 | \r |
e1f0eed1 | 119 | BITS 64\r |
78cf66ee LG |
120 | LongModeStart:\r |
121 | \r | |
122 | mov ax, 0x30\r | |
123 | o16 mov ds, ax\r | |
124 | o16 mov es, ax\r | |
125 | o16 mov ss, ax\r | |
126 | \r | |
127 | mov edi, esi\r | |
128 | add edi, LockLocation\r | |
129 | mov al, NotVacantFlag\r | |
130 | TestLock:\r | |
131 | xchg byte [edi], al\r | |
132 | cmp al, NotVacantFlag\r | |
133 | jz TestLock\r | |
134 | \r | |
135 | ProgramStack:\r | |
136 | \r | |
137 | mov edi, esi\r | |
138 | add edi, StackSizeLocation\r | |
139 | mov rax, qword [edi]\r | |
140 | mov edi, esi\r | |
141 | add edi, StackStartAddressLocation\r | |
142 | add rax, qword [edi]\r | |
143 | mov rsp, rax\r | |
144 | mov qword [edi], rax\r | |
145 | \r | |
146 | Releaselock:\r | |
147 | \r | |
148 | mov al, VacantFlag\r | |
149 | mov edi, esi\r | |
150 | add edi, LockLocation\r | |
151 | xchg byte [edi], al\r | |
152 | \r | |
153 | ;\r | |
154 | ; Call assembly function to initialize FPU.\r | |
155 | ;\r | |
156 | mov rax, ASM_PFX(InitializeFloatingPointUnits)\r | |
157 | sub rsp, 0x20\r | |
158 | call rax\r | |
159 | add rsp, 0x20\r | |
160 | \r | |
161 | ;\r | |
162 | ; Call C Function\r | |
163 | ;\r | |
164 | mov edi, esi\r | |
165 | add edi, CProcedureLocation\r | |
166 | mov rax, qword [edi]\r | |
167 | \r | |
168 | test rax, rax\r | |
169 | jz GoToSleep\r | |
170 | \r | |
171 | sub rsp, 0x20\r | |
172 | call rax\r | |
173 | add rsp, 0x20\r | |
174 | \r | |
175 | GoToSleep:\r | |
176 | cli\r | |
177 | hlt\r | |
178 | jmp $-2\r | |
179 | \r | |
180 | RendezvousFunnelProcEnd:\r | |
181 | \r | |
182 | ;-------------------------------------------------------------------------------------\r | |
183 | ; AsmGetAddressMap (&AddressMap);\r | |
184 | ;-------------------------------------------------------------------------------------\r | |
185 | ; comments here for definition of address map\r | |
186 | global ASM_PFX(AsmGetAddressMap)\r | |
187 | ASM_PFX(AsmGetAddressMap):\r | |
188 | mov rax, RendezvousFunnelProcStart\r | |
189 | mov qword [rcx], rax\r | |
190 | mov qword [rcx+0x8], PMODE_ENTRY - RendezvousFunnelProcStart\r | |
191 | mov qword [rcx+0x10], FLAT32_JUMP - RendezvousFunnelProcStart\r | |
192 | mov qword [rcx+0x18], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r | |
193 | mov qword [rcx+0x20], LongModeStart - RendezvousFunnelProcStart\r | |
194 | mov qword [rcx+0x28], LONG_JUMP - RendezvousFunnelProcStart\r | |
195 | ret\r | |
196 | \r |