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(*
$Id$
------------------------------------------------------------------------------
Header file for libgba DMA definitions
Copyright 2003-2004 by Dave Murphy.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
Please report all bugs and problems through the bug tracker at
"http://sourceforge.net/tracker/?group_id=114505&atid=668551".
------------------------------------------------------------------------------
Conversion by Legolas (http://itaprogaming.free.fr) for freepascal compiler
(http://www.freepascal.org)
Copyright (C) 2006 Francesco Lombardi
Check http://sourceforge.net/projects/libndsfpc for updates
------------------------------------------------------------------------------
$Log$
*)
{$ifdef GBA_INTERFACE}
const
REG_DMA0SAD : pu32 = pointer(REG_BASE + $0b0);
REG_DMA0DAD : pu32 = pointer(REG_BASE + $0b4);
REG_DMA0CNT : pu32 = pointer(REG_BASE + $0b8);
REG_DMA1SAD : pu32 = pointer(REG_BASE + $0bc);
REG_DMA1DAD : pu32 = pointer(REG_BASE + $0c0);
REG_DMA1CNT : pu32 = pointer(REG_BASE + $0c4);
REG_DMA2SAD : pu32 = pointer(REG_BASE + $0c8);
REG_DMA2DAD : pu32 = pointer(REG_BASE + $0cc);
REG_DMA2CNT : pu32 = pointer(REG_BASE + $0d0);
REG_DMA3SAD : pu32 = pointer(REG_BASE + $0d4);
REG_DMA3DAD : pu32 = pointer(REG_BASE + $0d8);
REG_DMA3CNT : pu32 = pointer(REG_BASE + $0dc);
DMA_DST_INC = (0 shl 21);
DMA_DST_DEC = (1 shl 21);
DMA_DST_FIXED = (2 shl 21);
DMA_DST_RELOAD = (3 shl 21);
DMA_SRC_INC = (0 shl 23);
DMA_SRC_DEC = (1 shl 23);
DMA_SRC_FIXED = (2 shl 23);
DMA_REPEAT = (1 shl 25);
DMA16 = (0 shl 26);
DMA32 = (1 shl 26);
GAMEPAK_DRQ = (1 shl 27);
DMA_IMMEDIATE = (0 shl 28);
DMA_VBLANK = (1 shl 28);
DMA_HBLANK = (2 shl 28);
DMA_SPECIAL = (3 shl 28);
DMA_IRQ = (1 shl 30);
DMA_ENABLE = (1 shl 31);
procedure DMA0COPY(source: pu16; dest: pu16; mode: u32); inline;
procedure DMA1COPY(source: pu16; dest: pu16; mode: u32); inline;
procedure DMA2COPY(source: pu16; dest: pu16; mode: u32); inline;
procedure DMA3COPY(source: pu16; dest: pu16; mode: u32); inline;
procedure DMA_Copy(channel: byte; source, dest: pu16; mode: u32); inline;
procedure dmaCopy(const source: pointer; dest: pointer; size: u32); inline;
{$endif GBA_INTERFACE}
{$ifdef GBA_IMPLEMENTATION}
procedure DMA0COPY(source: pu16; dest: pu16; mode: u32); inline;
begin
REG_DMA0SAD^ := u32(source);
REG_DMA0DAD^ := u32(dest);
REG_DMA0CNT^ := DMA_ENABLE or mode;
end;
procedure DMA1COPY(source: pu16; dest: pu16; mode: u32); inline;
begin
REG_DMA1SAD^ := u32(source);
REG_DMA1DAD^ := u32(dest);
REG_DMA1CNT^ := DMA_ENABLE or mode;
end;
procedure DMA2COPY(source: pu16; dest: pu16; mode: u32); inline;
begin
REG_DMA2SAD^ := u32(source);
REG_DMA2DAD^ := u32(dest);
REG_DMA2CNT^ := DMA_ENABLE or mode;
end;
procedure DMA3COPY(source: pu16; dest: pu16; mode: u32); inline;
begin
REG_DMA3SAD^ := u32(source);
REG_DMA3DAD^ := u32(dest);
REG_DMA3CNT^ := DMA_ENABLE or mode;
end;
procedure DMA_Copy(channel: byte; source, dest: pu16; mode: u32); inline;
begin
case channel of
0: DMA0COPY(source, dest, mode);
1: DMA1COPY(source, dest, mode);
2: DMA2COPY(source, dest, mode);
3: DMA3COPY(source, dest, mode);
end;
end;
procedure dmaCopy(const source: pointer; dest: pointer; size: u32); inline;
begin
DMA_Copy(3, source, dest, DMA16 or (size shr 1));
end;
{$endif GBA_IMPLEMENTATION}
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