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