include/hw/dma/i8257.h

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