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 StackStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x04 27 .equ StackSize, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08 28 .equ RendezvousProc, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x0C 29 .equ GdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10 30 .equ IdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x16 31 .equ BufferStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x1C 32 33 #------------------------------------------------------------------------------------- 34 #RendezvousFunnelProc procedure follows. All APs execute their procedure. This 35 #procedure serializes all the AP processors through an Init sequence. It must be 36 #noted that APs arrive here very raw...ie: real mode, no stack. 37 #ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC 38 #IS IN MACHINE CODE. 39 #------------------------------------------------------------------------------------- 40 #RendezvousFunnelProc (&WakeUpBuffer,MemAddress); 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 flat32Start: 57 58 .byte 0xBE 59 .word BufferStart 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 GdtrProfile 64 .byte 0x66 # db 66h 65 .byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si] 66 67 .byte 0xBE 68 .word IdtrProfile 69 .byte 0x66 # db 66h 70 .byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si] 71 72 .byte 0x33,0xC0 # xor ax, ax 73 .byte 0x8E,0xD8 # mov ds, ax 74 75 .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0 76 .byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0) 77 .byte 0xF,0x22,0xC0 # mov cr0, eax 78 79 FLAT32_JUMP: 80 81 .byte 0x66,0x67,0xEA # far jump 82 .long 0x0 # 32-bit offset 83 .word 0x20 # 16-bit selector 84 85 PMODE_ENTRY: # protected mode entry point 86 87 movw $0x8,%ax 88 .byte 0x66 89 movw %ax,%ds 90 .byte 0x66 91 movw %ax,%es 92 .byte 0x66 93 movw %ax,%fs 94 .byte 0x66 95 movw %ax,%gs 96 .byte 0x66 97 movw %ax,%ss # Flat mode setup. 98 99 movl %edx,%esi 100 101 movl %esi,%edi 102 addl $LockLocation, %edi 103 movb $NotVacantFlag, %al 104 TestLock: 105 xchgb (%edi), %al 106 cmpb $NotVacantFlag, %al 107 jz TestLock 108 109 ProgramStack: 110 111 movl %esi,%edi 112 addl $StackSize, %edi 113 movl (%edi),%eax 114 movl %esi,%edi 115 addl $StackStart, %edi 116 addl (%edi),%eax 117 movl %eax,%esp 118 movl %eax,(%edi) 119 120 Releaselock: 121 122 movb $VacantFlag, %al 123 movl %esi,%edi 124 addl $LockLocation, %edi 125 xchgb (%edi), %al 126 127 # 128 # Call assembly function to initialize FPU. 129 # 130 lea ASM_PFX(InitializeFloatingPointUnits), %ebx 131 call *%ebx 132 # 133 # Call C Function 134 # 135 movl %esi,%edi 136 addl $RendezvousProc, %edi 137 movl (%edi),%eax 138 139 testl %eax,%eax 140 jz GoToSleep 141 call *%eax # Call C function 142 143 GoToSleep: 144 cli 145 hlt 146 jmp GoToSleep 147 148 RendezvousFunnelProcEnd: 149 #------------------------------------------------------------------------------------- 150 # AsmGetAddressMap (&AddressMap); 151 #------------------------------------------------------------------------------------- 152 ASM_GLOBAL ASM_PFX(AsmGetAddressMap) 153 ASM_PFX(AsmGetAddressMap): 154 155 pushal 156 movl %esp,%ebp 157 158 movl 0x24(%ebp), %ebx 159 movl $RendezvousFunnelProcStart, (%ebx) 160 movl $(PMODE_ENTRY - RendezvousFunnelProcStart), 0x4(%ebx) 161 movl $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x8(%ebx) 162 movl $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x0c(%ebx) 163 164 popal 165 ret 166
