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 #include "qom/object.h"
   7
   8 #define TYPE_I8257 "i8257"
   9 typedef struct I8257State I8257State;
  10 DECLARE_INSTANCE_CHECKER(I8257State, I8257,
  11                          TYPE_I8257)
  12
  13 typedef struct I8257Regs {
  14     int now[2];
  15     uint16_t base[2];
  16     uint8_t mode;
  17     uint8_t page;
  18     uint8_t pageh;
  19     uint8_t dack;
  20     uint8_t eop;
  21     IsaDmaTransferHandler transfer_handler;
  22     void *opaque;
  23 } I8257Regs;
  24
  25 struct I8257State {
  26     /* <private> */
  27     ISADevice parent_obj;
  28
  29     /* <public> */
  30     int32_t base;
  31     int32_t page_base;
  32     int32_t pageh_base;
  33     int32_t dshift;
  34
  35     uint8_t status;
  36     uint8_t command;
  37     uint8_t mask;
  38     uint8_t flip_flop;
  39     I8257Regs regs[4];
  40     MemoryRegion channel_io;
  41     MemoryRegion cont_io;
  42
  43     QEMUBH *dma_bh;
  44     bool dma_bh_scheduled;
  45     int running;
  46     PortioList portio_page;
  47     PortioList portio_pageh;
  48 };
  49
  50 void i8257_dma_init(ISABus *bus, bool high_page_enable);
  51
  52 #endif