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/////////////////////////////////////////////////////////////////////////
// $Id: dma.h,v 1.15 2003/05/03 07:41:27 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser 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
#ifndef _PCDMA_H
#define _PCDMA_H
#if BX_USE_DMA_SMF
# define BX_DMA_SMF static
# define BX_DMA_THIS theDmaDevice->
#else
# define BX_DMA_SMF
# define BX_DMA_THIS this->
#endif
class bx_dma_c : public bx_dma_stub_c {
public:
bx_dma_c();
~bx_dma_c(void);
virtual void init(void);
virtual void bios_init(void);
virtual void reset(unsigned type);
virtual void raise_HLDA(void);
virtual void set_DRQ(unsigned channel, bx_bool val);
virtual unsigned get_TC(void);
virtual unsigned registerDMA8Channel(unsigned channel,
void (* dmaRead)(Bit8u *data_byte),
void (* dmaWrite)(Bit8u *data_byte),
const char *name);
virtual unsigned registerDMA16Channel(unsigned channel,
void (* dmaRead)(Bit16u *data_word),
void (* dmaWrite)(Bit16u *data_word),
const char *name);
virtual unsigned unregisterDMAChannel(unsigned channel);
private:
static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#if !BX_USE_DMA_SMF
Bit32u read( Bit32u address, unsigned io_len) BX_CPP_AttrRegparmN(2);
void write(Bit32u address, Bit32u value, unsigned io_len) BX_CPP_AttrRegparmN(3);
#endif
BX_DMA_SMF void control_HRQ(bx_bool ma_sl);
BX_DMA_SMF void reset_controller(unsigned num);
struct {
bx_bool DRQ[4]; // DMA Request
bx_bool DACK[4]; // DMA Acknowlege
bx_bool mask[4];
bx_bool flip_flop;
Bit8u status_reg;
Bit8u command_reg;
Bit8u request_reg;
Bit8u temporary_reg;
struct {
struct {
Bit8u mode_type;
Bit8u address_decrement;
Bit8u autoinit_enable;
Bit8u transfer_type;
} mode;
Bit16u base_address;
Bit16u current_address;
Bit16u base_count;
Bit16u current_count;
Bit8u page_reg;
bx_bool used;
} chan[4]; /* DMA channels 0..3 */
} s[2]; // state information DMA-1 / DMA-2
bx_bool HLDA; // Hold Acknowlege
bx_bool TC; // Terminal Count
struct {
void (* dmaRead8)(Bit8u *data_byte);
void (* dmaWrite8)(Bit8u *data_byte);
void (* dmaRead16)(Bit16u *data_word);
void (* dmaWrite16)(Bit16u *data_word);
} h[4]; // DMA read and write handlers
};
#endif // #ifndef _PCDMA_H
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