1 #------------------------------------------------------------------------------ 2 # 3 # Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> 4 # This program and the accompanying materials 5 # are licensed and made available under the terms and conditions of the BSD License 6 # which accompanies this distribution. The full text of the license may be found at 7 # http://opensource.org/licenses/bsd-license.php. 8 # 9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 # 12 # Module Name: 13 # 14 # MpFuncs.S 15 # 16 # Abstract: 17 # 18 # This is the assembly code for Multi-processor S3 support 19 # 20 #------------------------------------------------------------------------------ 21 22 .equ VacantFlag, 0x0 23 .equ NotVacantFlag, 0xff 24 25 .equ LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart 26 .equ StackStartAddressLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08 27 .equ StackSizeLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10 28 .equ CProcedureLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x18 29 .equ GdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x20 30 .equ IdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x2A 31 .equ BufferStartLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x34 32 .equ Cr3OffsetLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x38 33 34 #------------------------------------------------------------------------------------- 35 #RendezvousFunnelProc procedure follows. All APs execute their procedure. This 36 #procedure serializes all the AP processors through an Init sequence. It must be 37 #noted that APs arrive here very raw...ie: real mode, no stack. 38 #ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC 39 #IS IN MACHINE CODE. 40 #------------------------------------------------------------------------------------- 41 #RendezvousFunnelProc (&WakeUpBuffer,MemAddress); 42 43 .code: 44 45 ASM_GLOBAL ASM_PFX(RendezvousFunnelProc) 46 ASM_PFX(RendezvousFunnelProc): 47 RendezvousFunnelProcStart: 48 49 # At this point CS = 0x(vv00) and ip= 0x0. 50 51 .byte 0x8c,0xc8 # mov ax, cs 52 .byte 0x8e,0xd8 # mov ds, ax 53 .byte 0x8e,0xc0 # mov es, ax 54 .byte 0x8e,0xd0 # mov ss, ax 55 .byte 0x33,0xc0 # xor ax, ax 56 .byte 0x8e,0xe0 # mov fs, ax 57 .byte 0x8e,0xe8 # mov gs, ax 58 59 flat32Start: 60 61 .byte 0xBE 62 .word BufferStartLocation 63 .byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer 64 65 .byte 0xBE 66 .word Cr3OffsetLocation 67 .byte 0x66,0x8B,0xC # mov ecx,dword ptr [si] ; ECX is keeping the value of CR3 68 69 .byte 0xBE 70 .word GdtrLocation 71 .byte 0x66 # db 66h 72 .byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si] 73 74 .byte 0xBE 75 .word IdtrLocation 76 .byte 0x66 # db 66h 77 .byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si] 78 79 .byte 0x33,0xC0 # xor ax, ax 80 .byte 0x8E,0xD8 # mov ds, ax 81 82 .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0 83 .byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0) 84 .byte 0xF,0x22,0xC0 # mov cr0, eax 85 86 FLAT32_JUMP: 87 88 .byte 0x66,0x67,0xEA # far jump 89 .long 0x0 # 32-bit offset 90 .word 0x20 # 16-bit selector 91 92 PMODE_ENTRY: # protected mode entry point 93 94 .byte 0x66,0xB8,0x18,0x0 # mov ax, 18h 95 .byte 0x66,0x8E,0xD8 # mov ds, ax 96 .byte 0x66,0x8E,0xC0 # mov es, ax 97 .byte 0x66,0x8E,0xE0 # mov fs, ax 98 .byte 0x66,0x8E,0xE8 # mov gs, ax 99 .byte 0x66,0x8E,0xD0 # mov ss, ax ; Flat mode setup. 100 101 .byte 0xF,0x20,0xE0 # mov eax, cr4 102 .byte 0xF,0xBA,0xE8,0x5 # bts eax, 5 103 .byte 0xF,0x22,0xE0 # mov cr4, eax 104 105 .byte 0xF,0x22,0xD9 # mov cr3, ecx 106 107 .byte 0x8B,0xF2 # mov esi, edx ; Save wakeup buffer address 108 109 .byte 0xB9 110 .long 0xC0000080 # mov ecx, 0c0000080h ; EFER MSR number. 111 .byte 0xF,0x32 # rdmsr ; Read EFER. 112 .byte 0xF,0xBA,0xE8,0x8 # bts eax, 8 ; Set LME=1. 113 .byte 0xF,0x30 # wrmsr ; Write EFER. 114 115 .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Read CR0. 116 .byte 0xF,0xBA,0xE8,0x1F # bts eax, 31 ; Set PG=1. 117 .byte 0xF,0x22,0xC0 # mov cr0, eax ; Write CR0. 118 119 LONG_JUMP: 120 121 .byte 0x67,0xEA # far jump 122 .long 0x0 # 32-bit offset 123 .word 0x38 # 16-bit selector 124 125 LongModeStart: 126 127 movw $0x30,%ax 128 .byte 0x66 129 movw %ax,%ds 130 .byte 0x66 131 movw %ax,%es 132 .byte 0x66 133 movw %ax,%ss 134 135 movl %esi,%edi 136 addl $LockLocation, %edi 137 movb $NotVacantFlag, %al 138 TestLock: 139 xchgb (%edi), %al 140 cmpb $NotVacantFlag, %al 141 jz TestLock 142 143 ProgramStack: 144 145 movl %esi,%edi 146 addl $StackSizeLocation, %edi 147 movq (%edi), %rax 148 movl %esi,%edi 149 addl $StackStartAddressLocation, %edi 150 addq (%edi), %rax 151 movq %rax, %rsp 152 movq %rax, (%edi) 153 154 Releaselock: 155 156 movb $VacantFlag, %al 157 movl %esi,%edi 158 addl $LockLocation, %edi 159 xchgb (%edi), %al 160 161 # 162 # Call assembly function to initialize FPU. 163 # 164 movabsq $ASM_PFX(InitializeFloatingPointUnits), %rax 165 subq $0x20, %rsp 166 call *%rax 167 addq $0x20, %rsp 168 # 169 # Call C Function 170 # 171 movl %esi,%edi 172 addl $CProcedureLocation, %edi 173 movq (%edi), %rax 174 175 testq %rax, %rax 176 jz GoToSleep 177 178 subq $0x20, %rsp 179 call *%rax 180 addq $0x20, %rsp 181 182 GoToSleep: 183 cli 184 hlt 185 jmp .-2 186 187 RendezvousFunnelProcEnd: 188 189 190 #------------------------------------------------------------------------------------- 191 # AsmGetAddressMap (&AddressMap); 192 #------------------------------------------------------------------------------------- 193 # comments here for definition of address map 194 ASM_GLOBAL ASM_PFX(AsmGetAddressMap) 195 ASM_PFX(AsmGetAddressMap): 196 movabsq $RendezvousFunnelProcStart, %rax 197 movq %rax, (%rcx) 198 movq $(PMODE_ENTRY - RendezvousFunnelProcStart), 0x08(%rcx) 199 movq $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x10(%rcx) 200 movq $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x18(%rcx) 201 movq $(LongModeStart - RendezvousFunnelProcStart), 0x20(%rcx) 202 movq $(LONG_JUMP - RendezvousFunnelProcStart), 0x28(%rcx) 203 ret 204 205
