1 #------------------------------------------------------------------------------ 2 # X64 assembly file for AP startup vector. 3 # 4 # Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR> 5 # This program and the accompanying materials 6 # are licensed and made available under the terms and conditions of the BSD License 7 # which accompanies this distribution. The full text of the license may be found at 8 # http://opensource.org/licenses/bsd-license.php 9 # 10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 # 13 #------------------------------------------------------------------------------ 14 15 16 .set VacantFlag, 0x0 17 .set NotVacantFlag, 0xff 18 19 .set LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart 20 .set StackStartAddressLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08 21 .set StackSizeLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10 22 .set CProcedureLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x18 23 .set GdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x20 24 .set IdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x2A 25 .set BufferStartLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x34 26 .set Cr3OffsetLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x38 27 .set ProcessorNumberLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x38 28 29 #------------------------------------------------------------------------------------- 30 31 #------------------------------------------------------------------------------------- 32 #RendezvousFunnelProc procedure follows. All APs execute their procedure. This 33 #procedure serializes all the AP processors through an Init sequence. It must be 34 #noted that APs arrive here very raw...ie: real mode, no stack. 35 #ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC 36 #IS IN MACHINE CODE. 37 #------------------------------------------------------------------------------------- 38 #RendezvousFunnelProc (&WakeUpBuffer,MemAddress); 39 40 .text 41 42 ASM_GLOBAL ASM_PFX(RendezvousFunnelProc) 43 ASM_PFX(RendezvousFunnelProc): 44 RendezvousFunnelProcStart: 45 46 # At this point CS = 0x(vv00) and ip= 0x0. 47 48 .byte 0x8c,0xc8 # mov ax, cs 49 .byte 0x8e,0xd8 # mov ds, ax 50 .byte 0x8e,0xc0 # mov es, ax 51 .byte 0x8e,0xd0 # mov ss, ax 52 .byte 0x33,0xc0 # xor ax, ax 53 .byte 0x8e,0xe0 # mov fs, ax 54 .byte 0x8e,0xe8 # mov gs, ax 55 56 # Switch to flat mode. 57 58 .byte 0xBE 59 .word BufferStartLocation 60 .byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer 61 62 .byte 0xBE 63 .word Cr3OffsetLocation 64 .byte 0x66,0x8B,0xC # mov ecx,dword ptr [si] ; ECX is keeping the value of CR3 65 66 .byte 0xBE 67 .word GdtrLocation 68 .byte 0x66 # db 66h 69 .byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si] 70 71 .byte 0xBE 72 .word IdtrLocation 73 .byte 0x66 # db 66h 74 .byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si] 75 76 .byte 0x33,0xC0 # xor ax, ax 77 .byte 0x8E,0xD8 # mov ds, ax 78 79 .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0 80 .byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0) 81 .byte 0xF,0x22,0xC0 # mov cr0, eax 82 83 FLAT32_JUMP: 84 85 .byte 0x66,0x67,0xEA # far jump 86 .long 0x0 # 32-bit offset 87 .word 0x20 # 16-bit selector 88 89 ProtectedModeStart: 90 91 .byte 0x66,0xB8,0x18,0x0 # mov ax, 18h 92 .byte 0x66,0x8E,0xD8 # mov ds, ax 93 .byte 0x66,0x8E,0xC0 # mov es, ax 94 .byte 0x66,0x8E,0xE0 # mov fs, ax 95 .byte 0x66,0x8E,0xE8 # mov gs, ax 96 .byte 0x66,0x8E,0xD0 # mov ss, ax ; Flat mode setup. 97 98 .byte 0xF,0x20,0xE0 # mov eax, cr4 99 .byte 0xF,0xBA,0xE8,0x5 # bts eax, 5 100 .byte 0xF,0x22,0xE0 # mov cr4, eax 101 102 .byte 0xF,0x22,0xD9 # mov cr3, ecx 103 104 .byte 0x8B,0xF2 # mov esi, edx ; Save wakeup buffer address 105 106 .byte 0xB9 107 .long 0xC0000080 # mov ecx, 0c0000080h ; EFER MSR number. 108 .byte 0xF,0x32 # rdmsr ; Read EFER. 109 .byte 0xF,0xBA,0xE8,0x8 # bts eax, 8 ; Set LME=1. 110 .byte 0xF,0x30 # wrmsr ; Write EFER. 111 112 .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Read CR0. 113 .byte 0xF,0xBA,0xE8,0x1F # bts eax, 31 ; Set PG=1. 114 .byte 0xF,0x22,0xC0 # mov cr0, eax ; Write CR0. 115 116 LONG_JUMP: 117 118 .byte 0x67,0xEA # far jump 119 .long 0x0 # 32-bit offset 120 .word 0x38 # 16-bit selector 121 122 LongModeStart: 123 124 movw $0x30,%ax 125 .byte 0x66 126 movw %ax,%ds 127 .byte 0x66 128 movw %ax,%es 129 .byte 0x66 130 movw %ax,%ss 131 132 # 133 # ProgramStack 134 # 135 movl $0x1b, %ecx 136 rdmsr 137 138 btl $10, %eax # Check for x2apic mode 139 jnc LegacyApicMode 140 movl $0x802, %ecx # Read APIC_ID 141 rdmsr 142 movl %eax, %ebx # ebx == apicid 143 jmp GetCpuNumber 144 145 LegacyApicMode: 146 andl $0xfffff000, %eax 147 addl $0x20, %eax 148 movl (%eax), %ebx 149 shrl $24, %ebx # ebx == apicid 150 151 GetCpuNumber: 152 xorq %rcx, %rcx 153 movl %esi,%edi 154 addl $ProcessorNumberLocation, %edi 155 movl (%edi, %ebx, 4), %ecx 156 157 movl %esi,%edi 158 addl $StackSizeLocation, %edi 159 movq (%edi), %rax 160 incq %rcx 161 mulq %rcx 162 163 movl %esi,%edi 164 addl $StackStartAddressLocation, %edi 165 movq (%edi), %rbx 166 addq %rbx, %rax 167 168 movq %rax, %rsp 169 170 # 171 # Call C Function 172 # 173 movl %esi,%edi 174 addl $CProcedureLocation, %edi 175 movq (%edi), %rax 176 177 testq %rax, %rax 178 jz GoToSleep 179 180 subq $0x20, %rsp 181 call *%rax 182 addq $0x20, %rsp 183 184 GoToSleep: 185 186 cli 187 hlt 188 jmp .-2 189 190 RendezvousFunnelProcEnd: 191 192 193 #------------------------------------------------------------------------------------- 194 # AsmGetAddressMap (&AddressMap); 195 #------------------------------------------------------------------------------------- 196 # comments here for definition of address map 197 ASM_GLOBAL ASM_PFX(AsmGetAddressMap) 198 ASM_PFX(AsmGetAddressMap): 199 #ifdef __APPLE__ 200 int $3 201 #else 202 movq $RendezvousFunnelProcStart, %rax 203 movq %rax, (%rcx) 204 movq $(ProtectedModeStart - RendezvousFunnelProcStart), 0x08(%rcx) 205 movq $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x10(%rcx) 206 movq $(LongModeStart - RendezvousFunnelProcStart), 0x18(%rcx) 207 movq $(LONG_JUMP - RendezvousFunnelProcStart), 0x20(%rcx) 208 movq $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x28(%rcx) 209 #endif 210 ret 211
