pcisim_memdev.c

此代码用于生成测试PCI设备的Verilog代码（Verilog代码为一种硬件描述语言）。此代码可以直接运行于LINUX下。

/*
 * Copyright (c) 2002 Picture Elements, Inc.
 *    Stephen Williams ([e-mail])
 */
#ident "$Id: pcisim_memdev.c,v 1.4 2003/09/16 23:38:08 steve Exp $"

# include  "pcisim_memdev.h"
# include  "pcisim.h"
# include  <malloc.h>

# define FILL_CMD    0x0000
# define COMPARE_CMD 0x0001
# define LOAD_CMD    0x0002
# define SAVE_CMD    0x0003

struct pcisim_memdev_s {
      unsigned config;
      unsigned long bar0;
      unsigned long bar1;
};

static void m1writel(struct pcisim_memdev_s*xsp,
		     unsigned long off, unsigned long val)
{
      pcisim_writel(xsp->bar1 + off, val);
}

static unsigned long m1readl(struct pcisim_memdev_s*xsp,
			     unsigned long off)
{
      return pcisim_readl(xsp->bar1 + off);
}

pcisim_memdev_t pcisim_memdev_init(unsigned config)
{
      unsigned long val;
      struct pcisim_memdev_s*xsp = calloc(1, sizeof(struct pcisim_memdev_s));

      xsp->config = config;

      val = pcisim_config_read(xsp->config + 16);
      xsp->bar0 = val & ~15;

      val = pcisim_config_read(xsp->config + 20);
      xsp->bar1 = val & ~15;

      return xsp;
}

unsigned long pcisim_memdev_start(pcisim_memdev_t xsp)
{
      return xsp->bar0;
}

void pcisim_memdev_fill(pcisim_memdev_t xsp,
			unsigned long off, unsigned cnt,
			unsigned long fill)
{
      m1writel(xsp,  4, off);
      m1writel(xsp,  8, cnt);
      m1writel(xsp, 12, fill);
	/* This starts the command going. */
      m1writel(xsp,  0, FILL_CMD);
}

int pcisim_memdev_compare(pcisim_memdev_t xsp,
			  unsigned long off0,
			  unsigned long off1,
			  unsigned cnt0)
{
      unsigned long rc;
      m1writel(xsp,  4, off0);
      m1writel(xsp,  8, cnt0);
      m1writel(xsp, 12, off1);
      m1writel(xsp,  0, COMPARE_CMD);

      rc = m1readl(xsp, 0);
      return (rc == 0)? 0 : 1;
}

int pcisim_memdev_load(pcisim_memdev_t xsp,
		       unsigned long offset,
		       unsigned long count,
		       const char*file)
{
      int rc;

      m1writel(xsp,  4, offset);
      m1writel(xsp,  8, count);

      rc = 12;
      while (file[0] != 0) {
	    unsigned long word = 0;

	    word |= ((unsigned long)file[0] <<  0) & 0x000000ffUL;
	    if (file[0] != 0) file += 1;
	    word |= ((unsigned long)file[0] <<  8) & 0x0000ff00UL;
	    if (file[0] != 0) file += 1;
	    word |= ((unsigned long)file[0] << 16) & 0x00ff0000UL;
	    if (file[0] != 0) file += 1;
	    word |= ((unsigned long)file[0] << 24) & 0xff000000UL;
	    if (file[0] != 0) file += 1;

	    m1writel(xsp, rc, word);
	    rc += 4;
      }

      m1writel(xsp, rc, 0);

      m1writel(xsp, 0, LOAD_CMD);

      rc = m1readl(xsp, 0);
      return rc;
}

int pcisim_memdev_save(pcisim_memdev_t xsp,
		       unsigned long offset,
		       unsigned long count,
		       const char*file)
{
      int rc;

      m1writel(xsp,  4, offset);
      m1writel(xsp,  8, count);

      rc = 12;
      while (file[0] != 0) {
	    unsigned long word = 0;

	    word |= (file[0] <<  0) & 0x000000ffUL;
	    if (file[0] != 0) file += 1;
	    word |= (file[0] <<  8) & 0x0000ff00UL;
	    if (file[0] != 0) file += 1;
	    word |= (file[0] << 16) & 0x00ff0000UL;
	    if (file[0] != 0) file += 1;
	    word |= (file[0] << 24) & 0xff000000UL;
	    if (file[0] != 0) file += 1;

	    m1writel(xsp, rc, word);
	    rc += 4;
      }

      m1writel(xsp, rc, 0);

      m1writel(xsp, 0, SAVE_CMD);

      rc = m1readl(xsp, 0);
      return rc;
}

			  
/*
 * $Log: pcisim_memdev.c,v $
 * Revision 1.4  2003/09/16 23:38:08  steve
 *  Add load and save commands.
 *
 * Revision 1.3  2002/10/16 16:54:24  steve
 *  Copyright and License notice.
 *
 * Revision 1.2  2002/09/08 00:03:10  steve
 *  Reorder compare parameters to be consistent with memcmp
 *
 * Revision 1.1  2002/08/22 01:30:06  steve
 *  Add the pcisim memdev device to the library.
 *
 */