qemu

FORK: QEMU emulator
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i8257.h (941B)

      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