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1 | ;------------------------------------------------------------------------------ ; |
2 | ; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> | |
3 | ; This program and the accompanying materials | |
4 | ; are licensed and made available under the terms and conditions of the BSD License | |
5 | ; which accompanies this distribution. The full text of the license may be found at | |
6 | ; http://opensource.org/licenses/bsd-license.php. | |
7 | ; | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
10 | ; | |
11 | ; Module Name: | |
12 | ; | |
13 | ; MpFuncs.nasm | |
14 | ; | |
15 | ; Abstract: | |
16 | ; | |
17 | ; This is the assembly code for MP support | |
18 | ; | |
19 | ;------------------------------------------------------------------------------- | |
20 | ||
21 | %include "MpEqu.inc" | |
46ba0f63 | 22 | extern ASM_PFX(InitializeFloatingPointUnits) |
f9d30595 JF |
23 | |
24 | SECTION .text | |
25 | ||
da1475e0 JF |
26 | ;------------------------------------------------------------------------------------- |
27 | ;RendezvousFunnelProc procedure follows. All APs execute their procedure. This | |
28 | ;procedure serializes all the AP processors through an Init sequence. It must be | |
29 | ;noted that APs arrive here very raw...ie: real mode, no stack. | |
30 | ;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC | |
31 | ;IS IN MACHINE CODE. | |
32 | ;------------------------------------------------------------------------------------- | |
33 | global ASM_PFX(RendezvousFunnelProc) | |
34 | ASM_PFX(RendezvousFunnelProc): | |
35 | RendezvousFunnelProcStart: | |
36 | ; At this point CS = 0x(vv00) and ip= 0x0. | |
37 | BITS 16 | |
38 | mov ebp, eax ; save BIST information | |
39 | ||
40 | mov ax, cs | |
41 | mov ds, ax | |
42 | mov es, ax | |
43 | mov ss, ax | |
44 | xor ax, ax | |
45 | mov fs, ax | |
46 | mov gs, ax | |
47 | ||
48 | mov si, BufferStartLocation | |
49 | mov ebx, [si] | |
50 | ||
51 | mov di, PmodeOffsetLocation | |
52 | mov eax, [di] | |
53 | mov di, ax | |
54 | sub di, 06h | |
55 | add eax, ebx | |
56 | mov [di],eax | |
57 | ||
58 | mov si, GdtrLocation | |
59 | o32 lgdt [cs:si] | |
60 | ||
61 | mov si, IdtrLocation | |
62 | o32 lidt [cs:si] | |
63 | ||
64 | xor ax, ax | |
65 | mov ds, ax | |
66 | ||
67 | mov eax, cr0 ;Get control register 0 | |
68 | or eax, 000000003h ;Set PE bit (bit #0) & MP | |
69 | mov cr0, eax | |
70 | ||
71 | jmp PROTECT_MODE_CS:strict dword 0 ; far jump to protected mode | |
72 | BITS 32 | |
73 | Flat32Start: ; protected mode entry point | |
74 | mov ax, PROTECT_MODE_DS | |
75 | mov ds, ax | |
76 | mov es, ax | |
77 | mov fs, ax | |
78 | mov gs, ax | |
79 | mov ss, ax | |
80 | ||
81 | mov esi, ebx | |
82 | mov edi, esi | |
83 | add edi, LockLocation | |
84 | mov eax, NotVacantFlag | |
85 | ||
86 | TestLock: | |
87 | xchg [edi], eax | |
88 | cmp eax, NotVacantFlag | |
89 | jz TestLock | |
90 | ||
91 | mov edi, esi | |
92 | add edi, NumApsExecutingLoction | |
93 | inc dword [edi] | |
94 | mov ebx, [edi] | |
95 | ||
96 | ProgramStack: | |
97 | mov edi, esi | |
98 | add edi, StackSizeLocation | |
99 | mov eax, [edi] | |
100 | mov edi, esi | |
101 | add edi, StackStartAddressLocation | |
102 | add eax, [edi] | |
103 | mov esp, eax | |
104 | mov [edi], eax | |
105 | ||
106 | Releaselock: | |
107 | mov eax, VacantFlag | |
108 | mov edi, esi | |
109 | add edi, LockLocation | |
110 | xchg [edi], eax | |
111 | ||
112 | CProcedureInvoke: | |
113 | push ebp ; push BIST data at top of AP stack | |
114 | xor ebp, ebp ; clear ebp for call stack trace | |
115 | push ebp | |
116 | mov ebp, esp | |
117 | ||
46ba0f63 JF |
118 | mov eax, ASM_PFX(InitializeFloatingPointUnits) |
119 | call eax ; Call assembly function to initialize FPU per UEFI spec | |
da1475e0 JF |
120 | |
121 | push ebx ; Push NumApsExecuting | |
122 | mov eax, esi | |
123 | add eax, LockLocation | |
124 | push eax ; push address of exchange info data buffer | |
125 | ||
126 | mov edi, esi | |
127 | add edi, ApProcedureLocation | |
128 | mov eax, [edi] | |
129 | ||
130 | call eax ; invoke C function | |
131 | ||
132 | jmp $ ; never reach here | |
133 | RendezvousFunnelProcEnd: | |
134 | ||
f9d30595 JF |
135 | |
136 | global ASM_PFX(AsmInitializeGdt) | |
137 | ASM_PFX(AsmInitializeGdt): | |
138 | push ebp | |
139 | mov ebp, esp | |
140 | pushad | |
141 | mov edi, [ebp + 8] ; Load GDT register | |
142 | ||
143 | lgdt [edi] ; and update the GDTR | |
144 | ||
145 | push PROTECT_MODE_CS | |
146 | mov eax, ASM_PFX(SetCodeSelectorFarJump) | |
147 | push eax | |
148 | retf | |
149 | ASM_PFX(SetCodeSelectorFarJump): | |
150 | mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too | |
151 | mov ds, ax | |
152 | mov es, ax | |
153 | mov fs, ax | |
154 | mov gs, ax | |
155 | mov ss, ax | |
156 | ||
157 | popad | |
158 | pop ebp | |
159 | ret |