include/hw/dma/i8257.h

   1 #ifndef HW_I8257_H
   2 #define HW_I8257_H
   3
   4 #include "hw/isa/isa.h"
   5 #include "exec/ioport.h"
   6
   7 #define TYPE_I8257 "i8257"
   8
   9 typedef struct I8257Regs {
  10     int now[2];
  11     uint16_t base[2];
  12     uint8_t mode;
  13     uint8_t page;
  14     uint8_t pageh;
  15     uint8_t dack;
  16     uint8_t eop;
  17     IsaDmaTransferHandler transfer_handler;
  18     void *opaque;
  19 } I8257Regs;
  20
  21 typedef struct I8257State {
  22     /* <private> */
  23     ISADevice parent_obj;
  24
  25     /* <public> */
  26     int32_t base;
  27     int32_t page_base;
  28     int32_t pageh_base;
  29     int32_t dshift;
  30
  31     uint8_t status;
  32     uint8_t command;
  33     uint8_t mask;
  34     uint8_t flip_flop;
  35     I8257Regs regs[4];
  36     MemoryRegion channel_io;
  37     MemoryRegion cont_io;
  38
  39     QEMUBH *dma_bh;
  40     bool dma_bh_scheduled;
  41     int running;
  42     PortioList portio_page;
  43     PortioList portio_pageh;
  44 } I8257State;
  45
  46 void i8257_dma_init(ISABus *bus, bool high_page_enable);
  47
  48 #endif