mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
abazhaniuk
396 lines
10 KiB
NASM
396 lines
10 KiB
NASM
TITLE cpu.asm: Assembly code for the i386 resources
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PUBLIC WritePortDword
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PUBLIC WritePortWord
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PUBLIC WritePortByte
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PUBLIC ReadPortDword
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PUBLIC ReadPortWord
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PUBLIC ReadPortByte
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PUBLIC WriteHighCMOSByte
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PUBLIC WriteLowCMOSByte
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PUBLIC SendAPMSMI
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PUBLIC WritePCIByte
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PUBLIC WritePCIWord
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PUBLIC WritePCIDword
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PUBLIC ReadPCIByte
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PUBLIC ReadPCIWord
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PUBLIC ReadPCIDword
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PUBLIC _rdmsr
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PUBLIC _wrmsr
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.586p
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.model flat,C
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.code
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;------------------------------------------------------------------------------
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; void _store_idtr(
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; unsigned char *address // rcx
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; )
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;------------------------------------------------------------------------------
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_store_idtr PROC
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mov ecx, dword ptr [esp+4]
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sidt dword ptr [ecx]
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ret
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_store_idtr ENDP
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;------------------------------------------------------------------------------
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; void _load_idtr(
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; unsigned char *address // rcx
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; )
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;------------------------------------------------------------------------------
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_load_idtr PROC
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mov ecx, dword ptr [esp+4]
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lidt fword ptr [ecx]
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ret
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_load_idtr ENDP
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;------------------------------------------------------------------------------
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; void _store_gdtr(
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; unsigned char *address // rcx
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; )
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;------------------------------------------------------------------------------
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_store_gdtr PROC
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mov ecx, dword ptr [esp+4]
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sgdt dword ptr [ecx]
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ret
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_store_gdtr ENDP
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;------------------------------------------------------------------------------
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; void _store_ldtr(
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; unsigned char *address // rcx
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; )
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;------------------------------------------------------------------------------
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_store_ldtr PROC
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mov ecx, dword ptr [esp+4]
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sldt word ptr [ecx]
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ret
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_store_ldtr ENDP
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;------------------------------------------------------------------------------
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; void __stdcall _rdmsr(
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; IN UINT32 msr,
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; OUT UINT32* msrlo,
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; OUT UINT32* msrhi
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; )
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;------------------------------------------------------------------------------
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_rdmsr PROC
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mov ecx, dword ptr [esp + 4] ; msr
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rdmsr
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mov ecx, dword ptr [esp + 8]
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mov dword ptr [ecx], eax ; msrlo
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mov ecx, dword ptr [esp + 12]
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mov dword ptr [ecx], edx ; msrhi
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ret
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_rdmsr ENDP
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;------------------------------------------------------------------------------
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; VOID __stdcall _wrmsr(
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; IN UINT32 msr,
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; IN UINT32 msrlo,
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; IN UINT32 msrhi
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; )
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;------------------------------------------------------------------------------
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_wrmsr PROC
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mov ecx, dword ptr [esp + 4] ; msr
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mov eax, dword ptr [esp + 8] ; msrlo
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mov edx, dword ptr [esp + 12] ; msrhi
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wrmsr
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ret
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_wrmsr ENDP
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;------------------------------------------------------------------------------
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;UINT32 _eflags()
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;------------------------------------------------------------------------------
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eflags PROC
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pushfd
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pop eax
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ret
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eflags ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePortDword (
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; IN UINT32 out_value
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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WritePortDword PROC
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mov eax, dword ptr [esp + 4] ; out_value
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mov edx, dword ptr [esp + 8] ; port_num
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out dx, eax
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ret
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WritePortDword ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePortWord (
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; IN UINT16 out_value
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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WritePortWord PROC
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mov eax, dword ptr [esp + 4] ; out_value
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mov edx, dword ptr [esp + 8] ; port_num
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out dx, ax
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ret
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WritePortWord ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePortByte (
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; IN UINT8 out_value
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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WritePortByte PROC
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mov eax, dword ptr [esp + 4] ; out_value
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mov edx, dword ptr [esp + 8] ; port_num
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out dx, al
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ret
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WritePortByte ENDP
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;------------------------------------------------------------------------------
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; UINT32
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; ReadPortDword (
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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ReadPortDword PROC
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xor eax, eax
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mov edx, dword ptr [esp + 4] ; port_num
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in eax, dx
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ret
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ReadPortDword ENDP
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;------------------------------------------------------------------------------
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; UINT16
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; ReadPortWord (
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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ReadPortWord PROC
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xor eax, eax
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mov edx, dword ptr [esp + 4] ; port_num
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in ax, dx
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ret
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ReadPortWord ENDP
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;------------------------------------------------------------------------------
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; UINT8
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; ReadPortByte (
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; IN UINT16 port_num
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; )
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;------------------------------------------------------------------------------
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ReadPortByte PROC
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xor eax, eax
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mov edx, dword ptr [esp + 4] ; port_num
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in al, dx
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ret
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ReadPortByte ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WriteHighCMOSByte (
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; IN UINT8 cmos_off
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; IN UINT8 val
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; )
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;------------------------------------------------------------------------------
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WriteHighCMOSByte PROC
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mov eax, dword ptr [esp + 4] ; cmos_off
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out 72h, al
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mov eax, dword ptr [esp + 8] ; val
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out 73h, al
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ret
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WriteHighCMOSByte ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WriteLowCMOSByte (
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; IN UINT8 cmos_off
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; IN UINT8 val
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; )
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;------------------------------------------------------------------------------
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WriteLowCMOSByte PROC
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mov eax, dword ptr [esp + 4] ; cmos_off
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or al, 80h
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out 70h, al
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mov eax, dword ptr [esp + 8] ; val
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out 71h, al
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ret
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WriteLowCMOSByte ENDP
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;------------------------------------------------------------------------------
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; VOID
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; SendAPMSMI (
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; IN UINT32 apm_port_value
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; IN UINT64 rax_value // NOT USED???
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; )
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;------------------------------------------------------------------------------
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SendAPMSMI PROC
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mov eax, dword ptr [esp + 4] ; apm_port_value
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mov dx, 0B2h
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out dx, eax
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ret
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SendAPMSMI ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePCIByte (
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; IN UINT32 pci_reg
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; IN UINT16 cfg_data_port
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; IN UINT8 byte_value
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; )
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;------------------------------------------------------------------------------
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WritePCIByte PROC
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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mov eax, dword ptr [esp + 12] ; word_value
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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out dx, al
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ret
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WritePCIByte ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePCIWord (
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; IN UINT32 pci_reg
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; IN UINT16 cfg_data_port
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; IN UINT16 word_value
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; )
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;------------------------------------------------------------------------------
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WritePCIWord PROC
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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mov eax, dword ptr [esp + 12] ; word_value
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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out dx, ax
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ret
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WritePCIWord ENDP
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;------------------------------------------------------------------------------
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; VOID
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; WritePCIDword (
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; IN UINT32 pci_reg
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; IN UINT16 cfg_data_port // rdx
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; IN UINT32 dword_value // r8
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; )
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;------------------------------------------------------------------------------
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WritePCIDword PROC
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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mov eax, dword ptr [esp + 12] ; dword_value
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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out dx, eax
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ret
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WritePCIDword ENDP
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;------------------------------------------------------------------------------
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; unsigned char
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; ReadPCIByte (
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; unsigned int pci_reg // rcx
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; unsigned short cfg_data_port // rdx
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; )
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;------------------------------------------------------------------------------
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ReadPCIByte PROC
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cli
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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xor eax, eax
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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in al, dx
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sti
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ret
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ReadPCIByte ENDP
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;------------------------------------------------------------------------------
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; unsigned short
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; ReadPCIWord (
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; unsigned int pci_reg // rcx
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; unsigned short cfg_data_port // rdx
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; )
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;------------------------------------------------------------------------------
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ReadPCIWord PROC
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cli
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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xor eax, eax
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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in ax, dx
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sti
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ret
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ReadPCIWord ENDP
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;------------------------------------------------------------------------------
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; unsigned int
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; ReadPCIDword (
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; unsigned int pci_reg // rcx
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; unsigned short cfg_data_port // rdx
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; )
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;------------------------------------------------------------------------------
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ReadPCIDword PROC
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cli
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mov eax, dword ptr [esp + 4] ; pci_reg
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mov dx, 0CF8h
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out dx, eax
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xor eax, eax
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mov edx, dword ptr [esp + 8] ; cfg_data_port
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in eax, dx
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sti
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ret
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ReadPCIDword ENDP
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;------------------------------------------------------------------------------
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; void
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; _swsmi (
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; unsigned int smi_code_data // rcx
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; IN UINT32 rax_value // rdx
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; IN UINT32 rbx_value // r8
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; IN UINT32 rcx_value // r9
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; IN UINT32 rdx_value // r10
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; IN UINT32 rsi_value // r11
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; IN UINT32 rdi_value // r12
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; )
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;------------------------------------------------------------------------------
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_swsmi PROC
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xor eax, eax
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ret
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_swsmi ENDP
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END
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