diff options
Diffstat (limited to 'Core/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.S')
| -rw-r--r-- | Core/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.S | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.S b/Core/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.S new file mode 100644 index 0000000000..75aa312a6e --- /dev/null +++ b/Core/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.S @@ -0,0 +1,165 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php.
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+# MpFuncs.S
+#
+# Abstract:
+#
+# This is the assembly code for Multi-processor S3 support
+#
+#------------------------------------------------------------------------------
+
+.equ VacantFlag, 0x0
+.equ NotVacantFlag, 0xff
+
+.equ LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart
+.equ StackStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x04
+.equ StackSize, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08
+.equ RendezvousProc, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x0C
+.equ GdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10
+.equ IdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x16
+.equ BufferStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x1C
+
+#-------------------------------------------------------------------------------------
+#RendezvousFunnelProc procedure follows. All APs execute their procedure. This
+#procedure serializes all the AP processors through an Init sequence. It must be
+#noted that APs arrive here very raw...ie: real mode, no stack.
+#ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
+#IS IN MACHINE CODE.
+#-------------------------------------------------------------------------------------
+#RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
+
+ASM_GLOBAL ASM_PFX(RendezvousFunnelProc)
+ASM_PFX(RendezvousFunnelProc):
+RendezvousFunnelProcStart:
+
+# At this point CS = 0x(vv00) and ip= 0x0.
+
+ .byte 0x8c,0xc8 # mov ax, cs
+ .byte 0x8e,0xd8 # mov ds, ax
+ .byte 0x8e,0xc0 # mov es, ax
+ .byte 0x8e,0xd0 # mov ss, ax
+ .byte 0x33,0xc0 # xor ax, ax
+ .byte 0x8e,0xe0 # mov fs, ax
+ .byte 0x8e,0xe8 # mov gs, ax
+
+flat32Start:
+
+ .byte 0xBE
+ .word BufferStart
+ .byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
+
+ .byte 0xBE
+ .word GdtrProfile
+ .byte 0x66 # db 66h
+ .byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si]
+
+ .byte 0xBE
+ .word IdtrProfile
+ .byte 0x66 # db 66h
+ .byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si]
+
+ .byte 0x33,0xC0 # xor ax, ax
+ .byte 0x8E,0xD8 # mov ds, ax
+
+ .byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0
+ .byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0)
+ .byte 0xF,0x22,0xC0 # mov cr0, eax
+
+FLAT32_JUMP:
+
+ .byte 0x66,0x67,0xEA # far jump
+ .long 0x0 # 32-bit offset
+ .word 0x20 # 16-bit selector
+
+PMODE_ENTRY: # protected mode entry point
+
+ movw $0x8,%ax
+ .byte 0x66
+ movw %ax,%ds
+ .byte 0x66
+ movw %ax,%es
+ .byte 0x66
+ movw %ax,%fs
+ .byte 0x66
+ movw %ax,%gs
+ .byte 0x66
+ movw %ax,%ss # Flat mode setup.
+
+ movl %edx,%esi
+
+ movl %esi,%edi
+ addl $LockLocation, %edi
+ movb $NotVacantFlag, %al
+TestLock:
+ xchgb (%edi), %al
+ cmpb $NotVacantFlag, %al
+ jz TestLock
+
+ProgramStack:
+
+ movl %esi,%edi
+ addl $StackSize, %edi
+ movl (%edi),%eax
+ movl %esi,%edi
+ addl $StackStart, %edi
+ addl (%edi),%eax
+ movl %eax,%esp
+ movl %eax,(%edi)
+
+Releaselock:
+
+ movb $VacantFlag, %al
+ movl %esi,%edi
+ addl $LockLocation, %edi
+ xchgb (%edi), %al
+
+ #
+ # Call assembly function to initialize FPU.
+ #
+ lea ASM_PFX(InitializeFloatingPointUnits), %ebx
+ call *%ebx
+ #
+ # Call C Function
+ #
+ movl %esi,%edi
+ addl $RendezvousProc, %edi
+ movl (%edi),%eax
+
+ testl %eax,%eax
+ jz GoToSleep
+ call *%eax # Call C function
+
+GoToSleep:
+ cli
+ hlt
+ jmp GoToSleep
+
+RendezvousFunnelProcEnd:
+#-------------------------------------------------------------------------------------
+# AsmGetAddressMap (&AddressMap);
+#-------------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(AsmGetAddressMap)
+ASM_PFX(AsmGetAddressMap):
+
+ pushal
+ movl %esp,%ebp
+
+ movl 0x24(%ebp), %ebx
+ movl $RendezvousFunnelProcStart, (%ebx)
+ movl $(PMODE_ENTRY - RendezvousFunnelProcStart), 0x4(%ebx)
+ movl $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x8(%ebx)
+ movl $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x0c(%ebx)
+
+ popal
+ ret
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