LXR qemu/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
  10typedef 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
  22typedef 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
  47void i8257_dma_init(ISABus *bus, bool high_page_enable);
  48
  49#endif
  50