75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Implementation of the Intel DMA controllers.
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*
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* Version: @(#)dma.h 1.0.5 2018/03/11
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*
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2008-2017 Sarah Walker.
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* Copyright 2016,2017 Miran Grca.
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*/
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#ifndef EMU_DMA_H
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# define EMU_DMA_H
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#define DMA_NODATA -1
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#define DMA_OVER 0x10000
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#define DMA_VERIFY 0x20000
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/*DMA*/
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typedef struct dma_t
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{
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uint32_t ab, ac;
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uint16_t cb;
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int cc;
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int wp;
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uint8_t m, mode;
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uint8_t page;
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uint8_t stat, stat_rq;
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uint8_t command;
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int size;
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uint8_t ps2_mode;
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uint8_t arb_level;
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uint16_t io_addr;
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} dma_t;
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extern dma_t dma[8];
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extern void dma_init(void);
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extern void dma16_init(void);
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extern void ps2_dma_init(void);
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extern void dma_reset(void);
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extern int dma_mode(int channel);
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extern void readdma0(void);
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extern int readdma1(void);
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extern uint8_t readdma2(void);
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extern int readdma3(void);
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extern void writedma2(uint8_t temp);
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extern int dma_channel_read(int channel);
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extern int dma_channel_write(int channel, uint16_t val);
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extern void dma_alias_set(void);
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extern void dma_alias_remove(void);
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extern void dma_alias_remove_piix(void);
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extern void DMAPageRead(uint32_t PhysAddress, uint8_t *DataRead,
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uint32_t TotalSize);
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extern void DMAPageWrite(uint32_t PhysAddress, const uint8_t *DataWrite,
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uint32_t TotalSize);
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#endif /*EMU_DMA_H*/
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