105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002-2009 The Bochs Project
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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#ifndef _PCDMA_H
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#define _PCDMA_H
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#if BX_USE_DMA_SMF
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# define BX_DMA_SMF static
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# define BX_DMA_THIS theDmaDevice->
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#else
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# define BX_DMA_SMF
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# define BX_DMA_THIS this->
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#endif
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class bx_dma_c : public bx_dma_stub_c {
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public:
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bx_dma_c();
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virtual ~bx_dma_c();
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virtual void init(void);
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virtual void reset(unsigned type);
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virtual void raise_HLDA(void);
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virtual void set_DRQ(unsigned channel, bx_bool val);
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virtual unsigned get_TC(void);
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virtual void register_state(void);
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virtual unsigned registerDMA8Channel(unsigned channel,
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void (* dmaRead)(Bit8u *data_byte),
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void (* dmaWrite)(Bit8u *data_byte),
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const char *name);
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virtual unsigned registerDMA16Channel(unsigned channel,
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void (* dmaRead)(Bit16u *data_word),
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void (* dmaWrite)(Bit16u *data_word),
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const char *name);
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virtual unsigned unregisterDMAChannel(unsigned channel);
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private:
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static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
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static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#if !BX_USE_DMA_SMF
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Bit32u read (Bit32u address, unsigned io_len) BX_CPP_AttrRegparmN(2);
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void write(Bit32u address, Bit32u value, unsigned io_len) BX_CPP_AttrRegparmN(3);
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#endif
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BX_DMA_SMF void control_HRQ(bx_bool ma_sl);
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BX_DMA_SMF void reset_controller(unsigned num);
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struct {
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bx_bool DRQ[4]; // DMA Request
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bx_bool DACK[4]; // DMA Acknowlege
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bx_bool mask[4];
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bx_bool flip_flop;
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Bit8u status_reg;
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Bit8u command_reg;
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bx_bool ctrl_disabled;
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struct {
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struct {
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Bit8u mode_type;
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Bit8u address_decrement;
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Bit8u autoinit_enable;
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Bit8u transfer_type;
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} mode;
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Bit16u base_address;
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Bit16u current_address;
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Bit16u base_count;
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Bit16u current_count;
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Bit8u page_reg;
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bx_bool used;
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} chan[4]; /* DMA channels 0..3 */
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} s[2]; // state information DMA-1 / DMA-2
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bx_bool HLDA; // Hold Acknowlege
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bx_bool TC; // Terminal Count
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Bit8u ext_page_reg[16]; // Extra page registers (unused)
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struct {
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void (* dmaRead8)(Bit8u *data_byte);
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void (* dmaWrite8)(Bit8u *data_byte);
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void (* dmaRead16)(Bit16u *data_word);
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void (* dmaWrite16)(Bit16u *data_word);
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} h[4]; // DMA read and write handlers
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};
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#endif // #ifndef _PCDMA_H
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