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AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

        push    ds
%endif
%endmacro

%imacro unuse_ds 0
%ifndef flatmodel
        pop     ds
%endif
%endmacro

%imacro use_es 0
%ifndef flatmodel
        push    es
%endif
%endmacro

%imacro unuse_es 0
%ifndef flatmodel
        pop     es
%endif
%endmacro

; Macros for loading the address of a data pointer into a segment and
; index register pair. The %imacro explicitly loads DS or ES in the 16 bit
; memory model, or it simply loads the offset into the register in the flat
; memory model since DS and ES always point to all addressable memory. You
; must use the correct _REG (ie: _BX) %imacros for documentation purposes.

%imacro _lds    2
%ifdef flatmodel
        mov     %1,%2
%else
        lds     %1,%2
%endif
%endmacro

%imacro   _les  2
%ifdef flatmodel
        mov     %1,%2
%else
        les     %1,%2
%endif
%endmacro

; Macros for adding and subtracting a value from registers. Two value are
; provided, one for 16 bit modes and another for 32 bit modes (the extended
; register is used in 32 bit modes).

%imacro   _add  3
%ifdef flatmodel
        add     e%1, %3
%else
        add     %1, %2
%endif
%endmacro

%imacro _sub    3
%ifdef flatmodel
        sub     e%1, %3
%else
        sub     %1, %2
%endif
%endmacro

; Macro to clear the high order word for the 32 bit extended registers.
; This is used to convert an unsigned 16 bit value to an unsigned 32 bit
; value, and will evaluate to nothing in 16 bit modes.

%imacro clrhi   1
%ifdef  flatmodel
        movzx   e%1,%1
%endif
%endmacro

%imacro sgnhi   1
%ifdef  flatmodel
        movsx   e%1,%1
%endif
%endmacro

; Macro to load an extended register with an integer value in either mode

%imacro loadint 2
%ifdef flatmodel
        mov     e%1,%2
%else
        xor     e%1,e%1
        mov     %1,%2
%endif
%endmacro

; Macros to load and store integer values with string instructions

%imacro LODSINT 0
%ifdef flatmodel
        lodsd
%else
        lodsw
%endif
%endmacro

%imacro STOSINT 0
%ifdef flatmodel
        stosd
%else
        stosw
%endif
%endmacro

; Macros to provide resb, resw, resd compatibility with NASM

%imacro dclb 1
times %1 db 0
%endmacro

%imacro dclw 1
times %1 dw 0
%endmacro

%imacro dcld 1
times %1 dd 0
%endmacro

; Macro to get the addres of the GOT for Linux/FreeBSD shared
; libraries into the EBX register.

%imacro     get_GOT 1
            call    %%getgot
%%getgot:   pop     %1
            add     %1,_GLOBAL_OFFSET_TABLE_+$$-%%getgot wrt ..gotpc
%endmacro

; Macro to get the address of a *local* variable that is global to
; a single module in a manner that will work correctly when compiled
; into a Linux shared library. Note that this will *not* work for
; variables that are defined as global to all modules. For that
; use the LEA_G macro

%macro      LEA_L    2
%ifdef __PIC__
        get_GOT %1
        lea     %1,[%1+%2 wrt ..gotoff]
%else
        lea     %1,[%2]
%endif
%endmacro

; Same macro as above but for global variables public to *all*
; modules.

%macro      LEA_G    2
%ifdef __PIC__
        get_GOT %1
        mov     %1,[%1+%2 wrt ..got]
%else
        lea     %1,[%2]
%endif
%endmacro

; macros to declare assembler function stubs for function structures

%imacro BEGIN_STUBS_DEF 2
begdataseg  _STUBS
%ifdef  __NOU_VAR__
extern %1
%define STUBS_START %1
%else
extern _%1
%define STUBS_START _%1
%endif
enddataseg  _STUBS
begcodeseg  _STUBS
%assign off %2
%endmacro

%imacro   DECLARE_STUB  1
%ifdef __PIC__
        global %1:function
%1:
        get_GOT eax
        mov     eax,[eax+STUBS_START wrt ..got]
        jmp     [eax+off]
%else
%ifdef  __NOU__
        global %1
%1:
%else
        global _%1
_%1:
%endif
        jmp     [DWORD STUBS_START+off]
%endif
%assign off off+4
%endmacro

%imacro   SKIP_STUB  1
%assign off off+4
%endmacro

%imacro DECLARE_STDCALL 2
%ifdef  STDCALL_MANGLE
        global _%1@%2
_%1@%2:
%else
%ifdef STDCALL_USCORE
        global _%1
_%1:
%else
        global %1
%1:
%endif
%endif
        jmp     [DWORD STUBS_START+off]
%assign off off+4
%endmacro

%imacro   END_STUBS_DEF 0
endcodeseg  _STUBS
%endmacro

; macros to declare assembler import stubs for binary loadable drivers

%imacro BEGIN_IMPORTS_DEF   1
BEGIN_STUBS_DEF %1,4
%endmacro

%imacro   DECLARE_IMP   2
DECLARE_STUB    %1
%endmacro

%imacro   SKIP_IMP   2
SKIP_STUB    %1
%endmacro

%imacro   SKIP_IMP2   1
DECLARE_STUB    %1
%endmacro

%imacro   SKIP_IMP3   1
SKIP_STUB    %1
%endmacro

%imacro   END_IMPORTS_DEF 0
END_STUBS_DEF
%endmacro

else    ; __NASM_MAJOR__

;============================================================================
; Macro package when compiling with TASM.
;============================================================================

; Turn off underscores for globals if disabled for all externals

ifdef   __NOU__
__NOU_VAR__         = 1
endif

; Define the __WINDOWS__ symbol if we are compiling for any Windows
; environment

ifdef   __WINDOWS16__
__WINDOWS__         = 1
endif
ifdef   __WINDOWS32__
__WINDOWS__         = 1
__WINDOWS32_386__   = 1
endif
ifdef   __WIN386__
__WINDOWS__         = 1
__WINDOWS32_386__   = 1
endif
ifdef   __VXD__
__WINDOWS__         = 1
__WINDOWS32_386__   = 1
        MASM
        .386
        NO_SEGMENTS = 1
        include vmm.inc         ; IGNORE DEPEND
        include vsegment.inc    ; IGNORE DEPEND
        IDEAL
endif

; Macros for accessing 'generic' registers

ifdef   __FLAT__
        _ax         EQU eax     ; EAX is used for accumulator
        _bx         EQU ebx     ; EBX is used for accumulator
        _cx         EQU ecx     ; ECX is used for looping
        _dx         EQU edx     ; EDX is used for data register
        _si         EQU esi     ; ESI is the source index register
        _di         EQU edi     ; EDI is the destination index register
        _bp         EQU ebp     ; EBP is used for base pointer register
        _sp         EQU esp     ; ESP is used for stack pointer register
        _es         EQU         ; ES and DS are the same in 32 bit PM
        typedef UCHAR BYTE      ; Size of a character
        typedef USHORT WORD     ; Size of a short
        typedef UINT DWORD      ; Size of an integer
        typedef ULONG DWORD     ; Size of a long
        typedef BOOL DWORD      ; Size of a boolean
        typedef DPTR DWORD      ; Size of a data pointer
        typedef FDPTR FWORD     ; Size of a far data pointer
        typedef NDPTR DWORD     ; Size of a near data pointer
        typedef CPTR DWORD      ; Size of a code pointer
        typedef FCPTR FWORD     ; Size of a far code pointer
        typedef NCPTR DWORD     ; Size of a near code pointer
        typedef DUINT DWORD     ; Declare a integer variable
        FPTR        EQU NEAR    ; Distance for function pointers
        intsize     =   4       ; Size of an integer
        flatmodel   =   1       ; This is a flat memory model
        P386                    ; Turn on 386 code generation
        MODEL       FLAT        ; Set up for 32 bit simplified FLAT model
else
        _ax         EQU ax      ; AX is used for accumulator
        _bx         EQU bx      ; BX is used for accumulator
        _cx         EQU cx      ; CX is used for looping
        _dx         EQU dx      ; DX is used for data register
        _si         EQU si      ; SI is the source index register
        _di         EQU di      ; DI is the destination index register
        _bp         EQU bp      ; BP is used for base pointer register
        _sp         EQU sp      ; SP is used for stack pointer register
        _es         EQU es:     ; ES is used for segment override
        typedef UCHAR BYTE      ; Size of a character
        typedef USHORT WORD     ; Size of a short
        typedef UINT WORD       ; Size of an integer
        typedef ULONG DWORD     ; Size of a long
        typedef BOOL WORD       ; Size of a boolean
        typedef DPTR DWORD      ; Size of a data pointer
        typedef FDPTR DWORD     ; Size of a far data pointer
        typedef NDPTR WORD      ; Size of a near data pointer
        typedef CPTR DWORD      ; Size of a code pointer
        typedef FCPTR DWORD     ; Size of a far code pointer
        typedef NCPTR WORD      ; Size of a near code pointer
        typedef DUINT WORD      ; Declare a integer variable
        FPTR        EQU FAR     ; Distance for function pointers
        intsize     =   2       ; Size of an integer
        P386                    ; Turn on 386 code generation
endif
        invert      EQU not

; Provide a typedef for real floating point numbers

ifdef   DOUBLE
typedef REAL    QWORD
typedef DREAL   QWORD
else
typedef REAL    DWORD
typedef DREAL   DWORD
endif

; Macros to access the floating point stack registers to convert them
; from NASM style to TASM style

st0         EQU     st(0)
st1         EQU     st(1)
st2         EQU     st(2)
st3         EQU     st(3)
st4         EQU     st(4)
st5         EQU     st(5)
st6         EQU     st(6)
st7         EQU     st(7)
st8         EQU     st(8)

; Boolean truth values (same as those in debug.h)

ifndef  __VXD__
False       =       0
True        =       1
No          =       0
Yes         =       1
Yes         =       1
endif

; Macros for the _DATA data segment. This segment contains initialised data.

MACRO   begdataseg name
ifdef   __VXD__
        MASM
VXD_LOCKED_DATA_SEG
        IDEAL
else
ifdef   flatmodel
        DATASEG
else
SEGMENT _DATA DWORD PUBLIC USE16 'DATA'
endif
endif
ENDM

MACRO   enddataseg name
ifdef   __VXD__
        MASM
VXD_LOCKED_DATA_ENDS
        IDEAL
else
ifndef  flatmodel
ENDS    _DATA
endif
endif
ENDM

; Macro for the main code segment.

MACRO   begcodeseg name
ifdef   __VXD__
        MASM
VXD_LOCKED_CODE_SEG
        IDEAL
else
ifdef   flatmodel
        CODESEG
        ASSUME  CS:FLAT,DS:FLAT,SS:FLAT
else
SEGMENT &name&_TEXT PARA PUBLIC USE16 'CODE'
        ASSUME CS:&name&_TEXT,DS:_DATA
endif
endif
ENDM

; Macro for a near code segment

MACRO   begcodeseg_near
ifdef   flatmodel
        CODESEG
        ASSUME  CS:FLAT,DS:FLAT,SS:FLAT
else
SEGMENT _TEXT PARA PUBLIC USE16 'CODE'
        ASSUME CS:_TEXT,DS:_DATA
endif
ENDM

MACRO   endcodeseg name
ifdef   __VXD__
        MASM
VXD_LOCKED_CODE_ENDS
        IDEAL
else
ifndef  flatmodel
ENDS    &name&_TEXT
endif
endif