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|
;**********************************************************************
;**********************************************************************
;** **
;** (C)Copyright 1985-2009, American Megatrends, Inc. **
;** **
;** All Rights Reserved. **
;** **
;** 5555 Oakbrook Pkwy, Suite 200, Norcross, GA 30093 **
;** **
;** Phone: (770)-246-8600 **
;** **
;**********************************************************************
;**********************************************************************
; $Header: /Alaska/SOURCE/Modules/CMOS Manager/CMOS Core/CMOS Interfaces/CmosAccess32.inc 7 12/04/09 7:32p Michaela $
;
; $Revision: 7 $
;
; $Date: 12/04/09 7:32p $
;
;****************************************************************************
; Revision History
; ----------------
; $Log: /Alaska/SOURCE/Modules/CMOS Manager/CMOS Core/CMOS Interfaces/CmosAccess32.inc $
;
; 7 12/04/09 7:32p Michaela
;
; 6 7/29/09 9:58a Michaela
; updates Aptio Enhancement EIP 22205
; (no code changes)
;
; 5 6/02/09 3:27p Michaela
; For label: 4.6.3_CMOSMGR_11
;
; 4 2/16/09 10:24p Michaela
; GetPointerCmos32() and MaReadCmosByte()
; - OR index port values with CMOS_NMI_BIT_VALUE
; Global equate changes
; CMOS_BANK0_INDEX and CMOS_BANK0_DATA replaces
; CMOS_STD_INDEX and CMOS_STD_DATA
;
; 3 2/06/09 2:03p Michaela
; Fixed bug related to NMI policy token
;
; 2 1/21/09 3:32p Michaela
;
; 1 11/25/08 3:33p Michaela
; Updates for Label 4.6.3_CMOSMGR_08
; - Assembly macro fixes
; - Added assembly macros
; - Moved loading defaults into DXE phase
; - Updated help file example
;
; 2 11/25/08 3:29p Michaela
; Updates for Label 4.6.3_CMOSMGR_08
; - Assembly macro fixes
; - Added assembly macros
; - Moved loading defaults into DXE phase
; - Updated help file example
;
; 1 11/25/08 3:16p Michaela
; moved to CMOS Interfaces
;
; 4 11/17/08 4:40p Michaela
; --Removed Token Name strings in debug development code
;
; 3 11/17/08 3:50p Michaela
; --CMOS Buffer feature is depreciated
; --Port- and register-related constants are defined from SDL tokens
; --Explicit battery check is made on call to GetPointerCmos32.
; Upon battery error, carry flag is set and
; EAX = CMOS_BATTERY_ERR
; --For read/write access macros, EAX = CMOS_BATTERY_ERR
; upon bad battery error check
;
; 2 11/07/08 5:31p Michaela
; Added SS header
;
;*************************************************************************
;<AMI_FHDR_START>
;
; Name: CmosAccess32.inc
;
; Description:
; This file contains macros, constants, procedure definitions and structure
; declarations to be used in 32-bit assembly code.
;
;<AMI_FHDR_END>
;*************************************************************************
IFNDEF _CMOSACCESS32_INC_
_CMOSACCESS32_INC_ EQU 1
INCLUDE TokenEqu.equ
INCLUDE Token.equ
EFI_CMOS_ACCESS_INTERFACE struct
PeiServices DD 0 ; EFI_PEI_SERVICES **
Read DD 0 ; EFI_CMOS_READ
Write DD 0 ; EFI_CMOS_WRITE
GetTokenFromRegister DD 0 ; EFI_CMOS_GET_TOKEN_FROM_REGISTER
ReadCmosStatusBytes DD 0 ; EFI_CMOS_READ_STATUS_BYTES
GetTime DD 0 ; EFI_CMOS_GET_DATE_TIME
SetTime DD 0 ; EFI_CMOS_SET_DATE_TIME
Oem DD 0 ; EFI_HANDLE *
EFI_CMOS_ACCESS_INTERFACE ends
CMOS_WRITE_ACCESS EQU 0
CMOS_READ_ACCESS EQU 1
CLOCK_STATUS_REG EQU MKF_CMOS_RTC_STATUS_REGISTER
BATT_BIT EQU 080h ; bit 8 is battery status (set == good)
CMOS_BATTERY_ERR EQU 012h
CMOS_BITSIZE_ERR EQU 013h
CMOS_OVERFLOW_ERR EQU 014h
CMOS_ADDR_PORT equ MKF_CMOS_BANK0_INDEX ; standard CMOS r/w port
CMOS_DATA_PORT equ MKF_CMOS_BANK0_DATA
_Cmos TEXTEQU <(EFI_CMOS_ACCESS_INTERFACE PTR [eax])>
byte_reg_list TEXTEQU <al aL Al AL ah Ah aH AH bl Bl bL BL bh Bh bH BH cl Cl cL CL ch Ch cH CH dl Dl dL DL dh Dh dH DH>
;-----------------------------------------------------------------------------
; return true (1) if arg is a byte register or variable
; otherwise return 0
;-----------------------------------------------------------------------------
IS_BYTE_ARG MACRO arg
LOCAL pos, retval
; test for byte register
pos = @InStr(, %byte_reg_list, <arg>)
IF (pos GT 0)
retval = 1
; test for byte memory variable
ELSEIF (((OPATTR(arg)) AND 00000010y) AND (SIZEOF(TYPE(arg)) eq 1))
retval = 1
; otherwise a pushd should work
ELSE
retval = 0
ENDIF
EXITM %retval
ENDM
IO_DELAY MACRO
jmp $+2
jmp $+2
ENDM
IFDEF USE_EXTERN_CMOS_PROCS
EXTERN MaReadCmosByte :NEAR
EXTERN GetPointerCmos32 :NEAR
EXTERN ReadWriteCmosToken :NEAR C
EXTERN ReadWriteCmosRegister :NEAR C
ELSE
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Procedure: MaReadCmosByte
;
; Description:
; Reads a byte from the CMOS location specified by AL.
;
; Input:
; AL - CMOS location
;
; Output:
; AH - Value at CMOS location specified by AL
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
MaReadCmosByte PROC NEAR PRIVATE
or al, MKF_CMOS_NMI_BIT_VALUE ; set value of the NMI bit
out CMOS_ADDR_PORT, al
jmp short $+2
xchg ah, al
in al, CMOS_DATA_PORT
xchg ah, al
and al, NOT MKF_CMOS_NMI_BIT_VALUE ; clear NMI bit
ret
MaReadCmosByte ENDP
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Procedure: GetPointerCmos32
;
; Description:
; This routine returns the 32-bit value stored in CMOS where the high
; byte starts at location specified by register AL.
;
; Input:
; AL = Upper byte register (reads upper to lower bytes in
; increasing register addresses)
;
; Output:
; EAX = 32bit value stored in CMOS
; CF = set if error (EAX = Error code)
; CF = clear if success
;
; Modified:
; None
;
; Referrals:
; MaReadCmosByte
;
; Notes:
; This function is defined to be called from C or assembly.
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
GetPointerCmos32 PROC NEAR PRIVATE USES EBX
LOCAL ApiPointer:PTR DWORD,
LastByteRegister:BYTE
push ebx ; save temp register
;-----------------------------------------------------
; return error if battery is bad
; (using clock range ports)
;-----------------------------------------------------
push eax
mov al, CLOCK_STATUS_REG
or al, MKF_CMOS_NMI_BIT_VALUE ; set value of the NMI bit
out CMOS_ADDR_PORT, al
IO_DELAY
IO_DELAY
in al, CMOS_DATA_PORT ; AL = battery status
test al, BATT_BIT ; bit is set if OK
pop eax
.if (zero?)
stc
mov eax, CMOS_BATTERY_ERR ; CMOS battery is bad.
jmp GetPointerCmos32Exit
.endif
;-----------------------------------------------------
; No error, so get the API pointer
;-----------------------------------------------------
mov ApiPointer, 0
mov LastByteRegister, MKF_CMOS_ACCESS_API_BYTE3
add LastByteRegister, 3
mov al, MKF_CMOS_ACCESS_API_BYTE3
.while (al <= LastByteRegister)
call MaReadCmosByte
movzx ebx, ah ; ah = current byte ApiPointer
or ApiPointer, ebx ; set current byte in ApiPointer
inc al
.if (al <= LastByteRegister)
shl ApiPointer, 8
.endif
.endw
clc
mov eax, ApiPointer ; return the 32-bit ApiPointer in eax
GetPointerCmos32Exit:
pop ebx ; restore temp register
ret
GetPointerCmos32 ENDP
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: ReadWriteCmosRegister
;
; Description:
; This function calls EFI_CMOS_ACCESS_INTERFACE.Write or
; EFI_CMOS_ACCESS_INTERFACE.Read to write or read a CMOS value to
; a CMOS register.
;
; Input:
; AccessType - CMOS_WRITE_ACCESS or CMOS_READ_ACCESS (equate)
; CmosRegister - the CMOS register to write (this is not a CMOS token)
; CmosValue - value to be written or the return value of the read
;
;
; Output:
; eax - CMOS_BATTERY_ERR if battery is bad
; eax - EFI error code if bit 31 is set
; carry flag - clear on success or set on error
;
; Notes:
;
; Caller must ensure the register has been reserved & specified properly
; in SSP.
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
ReadWriteCmosRegister PROC NEAR32 C PRIVATE AccessType:DWORD,
CmosRegister:DWORD,
CmosValue:DWORD
LOCAL Cmos:DWORD
; AccessType: WriteType = 0
; ReadType = 1
; Cmos = GetPointerCmos32();
call GetPointerCmos32
jc @F ; carry flag set on error
mov Cmos, eax
; return Cmos->Read( Cmos,
; Cmos->GetTokenFromRegister(Cmos, CmosRegister),
; CmosValuePtr );
; (or)
;
; return Cmos->Write( Cmos,
; Cmos->GetTokenFromRegister(Cmos, CmosRegister),
; CmosValue );
push CmosValue
push CmosRegister
push Cmos
mov eax, Cmos
call _Cmos.GetTokenFromRegister
add esp, 2*4 ; pop CmosRegister & Cmos
push eax ; eax = CmosToken
push Cmos
mov eax, Cmos
.if (AccessType == CMOS_READ_ACCESS)
call _Cmos.Read
.else
call _Cmos.Write
.endif
add esp, 3*4 ; pop 3 args
clc ; clear error flag
@@:
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ret
ReadWriteCmosRegister ENDP
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: ReadWriteCmosToken
;
; Description:
; This function calls EFI_CMOS_ACCESS_INTERFACE.Write or
; EFI_CMOS_ACCESS_INTERFACE.Read to write or read a CMOS value to
; a CMOS register.
;
; Input:
; AccessType - CMOS_WRITE_ACCESS or CMOS_READ_ACCESS (equate)
; CmosToken - the encoded CMOS token (not a CMOS register)
; CmosValue - value to be written or the return value of the read
;
; Output:
; eax - CMOS_BATTERY_ERR if battery is bad
; eax - EFI error code if bit 31 is set
;
; Notes:
;
; Caller must ensure the register has been reserved & specified properly
; in SSP.
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
ReadWriteCmosToken PROC NEAR32 C PRIVATE AccessType:DWORD,
CmosToken:DWORD,
CmosValue:DWORD
LOCAL Cmos:DWORD
; AccessType: WriteType = 0
; ReadType = 1
; Cmos = GetPointerCmos32();
call GetPointerCmos32
jc @F ; carry flag set on error
mov Cmos, eax
; return Cmos->Read( Cmos,
; CmosToken,
; CmosValue );
; (or)
;
; return Cmos->Write( Cmos,
; CmosToken,
; CmosValue );
push CmosValue
push CmosToken
push Cmos
mov eax, Cmos
.if (AccessType == 1)
call _Cmos.Read
.else
call _Cmos.Write
.endif
add esp, 3*4 ; pop 3 args
clc ; clear error flag
@@:
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ret
ReadWriteCmosToken ENDP
ENDIF
;----------------------------------------------------------------------------
;----------------------------------------------------------------------------
; Start macro definitions
;----------------------------------------------------------------------------
;----------------------------------------------------------------------------
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: READ_CMOS_TOKEN
;
; Description:
; This macro invokes ReadWriteCmosToken() to read the CMOS location
; associated with CmosToken into the value byte at the address
; specified by CmosValuePtr, after pushing the required arguments onto
; the stack.
;
; Input:
; CmosToken - valid CMOS token as defined in TokenEqu.equ
;
; Output:
; CmosValuePtr - the byte value at this address is updated upon
; successful execution
; eax - CMOS_BATTERY_ERR if battery is bad
; eax - EFI error code if bit 31 is set
;
; Notes:
;
; Example call:
;
; lea ecx, CmosValue
; READ_CMOS_TOKEN CMOS_S3_COUNT_LOC, ecx
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
READ_CMOS_TOKEN MACRO CmosToken:REQ, ; SSP encoded CMOS Token
CmosValuePtr:REQ ; Address of byte to update
push CmosValuePtr ; push byte value's address
pushd CmosToken
pushd CMOS_READ_ACCESS
call ReadWriteCmosToken
add sp, 3*4 ; Pop 3 args @ 4 bytes each
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ENDM
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: READ_CMOS_PPI
;
; Description:
; This macro calls EFI_CMOS_ACCESS_INTERFACE.Read() to read the CMOS
; location associated with CmosToken into the value byte at the address
; specified by CmosValuePtr, after pushing the required arguments onto
; the stack.
;
; Input:
; Cmos - pointer to an instance of EFI_CMOS_ACCESS_INTERFACE
; CmosToken - valid CMOS Token as defined in TokenEqu.equ
;
; Output:
; CmosValuePtr
; - the byte value at this address is updated upon
; successful execution
; eax - EFI error code if bit 31 is set
;
; Modified:
; mm0 - destroyed
;
; Notes:
;
; Example usage:
;
; lea ecx, CmosValue
; READ_CMOS_PPI CmosPpiPtr, CMOS_S3_COUNT_LOC, ecx
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
READ_CMOS_PPI MACRO Cmos:REQ, ; PPI Pointer
CmosToken:REQ, ; SSP encoded CMOS Token
CmosValuePtr:REQ ; Address of byte to update
; return Cmos->Read( Cmos,
; CmosToken,
; CmosValuePtr );
push CmosValuePtr
pushd CmosToken
push Cmos
mov eax, Cmos
call _Cmos.Read
add esp, 3*4 ; pop 3 args
; EAX - EFI error code if error or zero if success
ENDM
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: READ_CMOS_REGISTER
;
; Description:
; This macro calls ReadWriteCmosRegister to read the physical CMOS
; register specified by CmosRegister into the value byte at the address
; specified by CmosValuePtr, after pushing the required arguments onto
; the stack.
;
; Input:
; CmosRegister - the physical CMOS register to read (not a CMOS token)
;
; Output:
; CmosValuePtr - the byte value at this address is updated upon
; successful execution
; eax - EFI_STATUS
;
; Notes:
;
; Caller must ensure the entire 8-bits of the register have been
; reserved properly/explicitly in SSP.
;
; Example call:
;
; lea ecx, CmosValue
; READ_CMOS_REGISTER CMOS_S3_COUNT_LOC_REG, ecx
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
READ_CMOS_REGISTER MACRO CmosRegister:REQ, ; CMOS register address
CmosValuePtr:REQ ; Address of byte to update
push CmosValuePtr ; push the address of the value
IF IS_BYTE_ARG(CmosRegister) eq 1
movd mm0, eax ; save eax
mov al, CmosRegister
and eax, 0FFh ; clear all but lower byte
push eax
movd eax, mm0 ; restore eax
ELSE
pushd CmosRegister
ENDIF
pushd CMOS_READ_ACCESS
call ReadWriteCmosRegister
add sp, 3*4 ; Pop 3 Read() args @ 4 bytes each
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ENDM
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: WRITE_CMOS_TOKEN
;
; Description:
; This macro invokes ReadWriteCmosToken() to write the byte specified
; by CmosValue to the CMOS location associated with CmosToken,
; after pushing the required arguments onto the stack.
;
; Input:
; CmosToken - valid CMOS Token as defined in TokenEqu.equ
; CmosValue - Byte value to write to the location associated with
; CmosToken
;
; Output:
; eax - EFI_STATUS
;
; Modified:
; mm0 - destroyed (used as temporary register if needed)
;
; Notes:
;
; Example usage:
;
; mov cl, TokenValue
; WRITE_CMOS_TOKEN CMOS_S3_COUNT_LOC, cl
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
WRITE_CMOS_TOKEN MACRO CmosToken:REQ, ; SSP encoded CMOS Token
CmosValue:REQ ; Byte value to write
IF IS_BYTE_ARG(CmosValue) eq 1
movd mm0, eax ; save eax
mov al, CmosValue
and eax, 0FFh ; clear all but lower byte
push eax
movd eax, mm0 ; restore eax
ELSE
pushd CmosValue
ENDIF
pushd CmosToken ; push CmosToken value
pushd CMOS_WRITE_ACCESS
call ReadWriteCmosToken
add sp, 3*4 ; Pop 3 Write() args @ 4 bytes each
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ENDM
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: WRITE_CMOS_PPI
;
; Description:
; This macro calls EFI_CMOS_ACCESS_INTERFACE.Write() to write the
; the value specified by CmosValue to the CMOS location associated with
; CmosToken, after pushing the required arguments onto the stack.
;
; Input:
; Cmos - pointer to an instance of EFI_CMOS_ACCESS_INTERFACE
; CmosToken - valid CMOS Token as defined in TokenEqu.equ
; CmosValue - Byte value to write to the location associated with
; CmosToken
;
; Output:
; eax - EFI_STATUS
;
; Modified:
; mm0 - destroyed (used as temporary register if needed)
;
; Notes:
;
; Example usage:
;
; mov cl, CmosTokenValue
; WRITE_CMOS_PPI CmosPpiPtr, CMOS_S3_COUNT_LOC, cl
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
WRITE_CMOS_PPI MACRO Cmos:REQ, ; PPI Pointer
CmosToken:REQ, ; SSP encoded CMOS Token
CmosValue:REQ ; Byte Value to write
; return Cmos->Write( Cmos,
; CmosToken,
; CmosValue );
IF IS_BYTE_ARG(CmosValue) eq 1
movd mm0, eax ; save eax
mov al, CmosValue
and eax, 0FFh ; clear all but lower byte
push eax
movd eax, mm0 ; restore eax
ELSE
pushd CmosValue
ENDIF
pushd CmosToken
push Cmos
mov eax, Cmos
call _Cmos.Write
add esp, 3*4 ; pop 3 args
; EAX - EFI error code if error or zero if success
ENDM
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Name: WRITE_CMOS_REGISTER
;
; Description:
; This macro calls ReadWriteCmosRegister to write the value specified
; by CmosValue to the physical CMOS location specified by CmosRegister
; after pushing the required arguments onto the stack.
;
; Input:
; CmosRegister - the physical CMOS register to write (not a CMOS token)
; CmosValue - byte value to write to CmosRegister
;
; Output:
; eax - EFI_STATUS
;
; Modified:
; mm0 - destroyed
;
; Notes:
; Caller must ensure the entire 8-bits of the register have been
; reserved properly/explicitly in SSP.
;
; Example usage:
;
; mov cl, CmosValue
; WRITE_CMOS_REGISTER S3_COUNT_LOC_REG, cl
; .if (eax != 0)
; ; handle error
; .endif
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
WRITE_CMOS_REGISTER MACRO CmosRegister:REQ, ; physical CMOS register
CmosValue:REQ ; Byte value to write
IF IS_BYTE_ARG(CmosValue) eq 1
movd mm0, eax ; save eax
mov al, CmosValue
and eax, 0FFh ; clear all but lower byte
push eax
movd eax, mm0 ; restore eax
ELSE
pushd CmosValue
ENDIF
IF IS_BYTE_ARG(CmosRegister) eq 1
movd mm0, eax ; save eax
mov al, CmosRegister
and eax, 0FFh ; clear all but lower byte
push eax
movd eax, mm0 ; restore eax
ELSE
pushd CmosRegister
ENDIF
pushd CMOS_WRITE_ACCESS
call ReadWriteCmosRegister
add sp, 3*4 ; Pop 3 args @ 4 bytes each
; EAX - CMOS_BATTERY_ERR if battery is bad
; EAX - EFI error code if bit 31 is set
ENDM
ENDIF
;**********************************************************************
;**********************************************************************
;** **
;** (C)Copyright 1985-2009, American Megatrends, Inc. **
;** **
;** All Rights Reserved. **
;** **
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;** **
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;**********************************************************************
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