pipesim/pipesim.h

   1 /*
   2   Copyright (c) 2020 Peter Hsu.  All Rights Reserved.  See LICENCE file for details.
   3 */
   4
   5
   6
   7 /*
   8   Instruction buffer is two-line cache with subblocking.
   9 */
  10 struct ibuf_t {
  11   long tag[2];
  12   long* ready[2];               /* ready[2][numblks] */
  13   long tag_mask;                /* pc mask = (1 << lg_line) - 1 */
  14   long blk_mask;                /* block index mask = numblks - 1 */
  15   long subblockmask;            /* = ~0UL << ib->lg_blksize */
  16   long curblk;                  /* pc of current ibuffer subblock */
  17   long misses;                  /* number of misses */
  18   long bufsz;                   /* log-base-2 of capacity (bytes) */
  19   long blksize;                 /* log-base-2 of block size (bytes) */
  20   long numblks;                 /* = (1<<lg_line)/(1<<lg_blksize) */
  21   long penalty;                 /* cycles to refill critical block */
  22   long delay;                   /* taken branch delay (pipeline flush) */
  23   int mru;                      /* which tag is most recently used */
  24 };
  25
  26 extern struct ibuf_t  ib;       /* instruction buffer model */
  27 extern struct cache_t ic;       /* instruction cache model */
  28 extern struct cache_t dc;       /* data cache model */
  29
  30 extern struct fifo_t* in;       /* input fifo */
  31 extern struct fifo_t* out;      /* output fifo (optional) */
  32
  33 extern int hart;
  34 extern uint64_t mem_queue[tr_memq_len];
  35
  36 extern long quiet, report;
  37
  38
  39 void perfCounters_init(const char* shm_name, int reader);
  40 void status_report(long now, long icount);
  41
  42 void fast_pipe(long next_report, long (*model_dcache)(long tr, const struct insn_t* p, long available));
  43 void trace_pipe(long next_report, long (*model_dcache)(long tr, const struct insn_t* p, long available));
  44 void count_pipe(long next_report, long (*model_dcache)(long tr, const struct insn_t* p, long available));
  45 void trace_count_pipe(long next_report, long (*model_dcache)(long tr, const struct insn_t* p, long available));
  46
  47 long dcache_writethru(long tr, const struct insn_t* p, long available);
  48 long dcache_writeback(long tr, const struct insn_t* p, long available);