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/* GRT VPI C helpers.
Copyright (C) 2003, 2004, 2005 Tristan Gingold & Felix Bertram
GHDL is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
//-----------------------------------------------------------------------------
// Description: VPI interface for GRT runtime, "C" helpers
// the main purpose of this code is to interface with the
// Icarus Verilog Interactive (IVI) simulator GUI
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
/* Define PLI_PROTOTYPES so that vpi_user.h do not import functions. */
#define PLI_PROTOTYPES
#define PROTO_PARAMS(params) params
#define XXTERN extern
#include "vpi_user.h"
#include "vpi_thunk.h"
/* Extension of a shared library. */
#if defined (WINNT)
#define DSO_EXT ".dll"
#elif defined (__APPLE__)
#define DSO_EXT ".dylib"
#else
#define DSO_EXT ".so"
#endif
extern PLI_INT32 vpi_control_np (int op, int status);
static vpi_thunk __ghdl_vpi_thunk_v1 =
{
vpi_register_systf,
vpi_vprintf,
vpi_mcd_close,
vpi_mcd_name,
vpi_mcd_open,
0, //vpi_mcd_open_x,
0, //vpi_mcd_vprintf,
0, //vpi_mcd_fputc,
0, //vpi_mcd_fgetc,
vpi_register_cb,
vpi_remove_cb,
0, //vpi_sim_vcontrol,
vpi_handle,
vpi_iterate,
vpi_scan,
vpi_handle_by_index,
vpi_get_time,
vpi_get,
vpi_get_str,
vpi_get_value,
vpi_put_value,
vpi_free_object,
vpi_get_vlog_info,
vpi_chk_error,
vpi_handle_by_name,
vpi_control_np
};
//-----------------------------------------------------------------------------
// VPI module load & startup
static void * module_open (const char *path);
static void * module_symbol (void *handle, const char *symbol);
static const char *module_error (void);
#if defined(__WIN32__)
#include <windows.h>
static void *
module_open (const char *path)
{
return (void *)LoadLibrary (path);
}
static void *
module_symbol (void *handle, const char *symbol)
{
return (void *)GetProcAddress ((HMODULE)handle, symbol);
}
static const char *
module_error (void)
{
static char msg[256];
FormatMessage
(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError (),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &msg,
sizeof (msg) - 1,
NULL);
return msg;
}
#else
#include <dlfcn.h>
static void *
module_open (const char *path)
{
return dlopen (path, RTLD_LAZY);
}
static void *
module_symbol (void *handle, const char *symbol)
{
return dlsym (handle, symbol);
}
static const char *
module_error (void)
{
return dlerror ();
}
#endif
#if defined (__APPLE__)
/* On Darwin: look in rpath. */
#define LIBNAME "@rpath/libghdlvpi" DSO_EXT
#else
#define LIBNAME "libghdlvpi" DSO_EXT
#endif
static const char libghdlvpi_name[] = LIBNAME;
int
loadVpiModule (const char* modulename)
{
static void *libghdlvpi_mod;
int i;
void *vpimod;
fprintf (stderr, "loading VPI module '%s'\n", modulename);
/* TODO: on windows, use SetDllDirectory with:
- install dir (libdir) => add -DLIBDIR=xxx
- exec path\lib => see windows_default_path
*/
vpimod = module_open (modulename);
if (vpimod == NULL)
{
const char *msg = module_error ();
fprintf (stderr, "%s\n", msg == NULL ? "unknown dlopen error" : msg);
return -1;
}
/* Try to load the libghdlvpi library and set the thunk.
No need to load the library several times. */
if (libghdlvpi_mod == NULL)
{
libghdlvpi_mod = module_open (libghdlvpi_name);
if (libghdlvpi_mod != NULL)
{
vpi_thunk **vpi_thunk_ptr;
for (i = 0; i < 2; i++)
{
vpi_thunk_ptr = module_symbol (libghdlvpi_mod, &"_VPI_THUNK"[i]);
if (vpi_thunk_ptr != NULL)
{
*vpi_thunk_ptr = &__ghdl_vpi_thunk_v1;
break;
}
}
if (vpi_thunk_ptr == NULL)
fprintf (stderr, "warning: VPI_THUNK not found in %s\n",
libghdlvpi_name);
}
}
for (i = 0; i < 2; i++) // try with and w/o leading underscores
{
void *vpitable = module_symbol (vpimod, &"_vlog_startup_routines"[i]);
if (vpitable)
{
unsigned int j;
typedef void (*vlog_startup_routines_t)(void);
vlog_startup_routines_t *vpifuns;
vpifuns = (vlog_startup_routines_t*)vpitable;
for (j = 0; vpifuns[j]; j++)
vpifuns[j]();
fprintf (stderr, "VPI module loaded!\n");
return 0; // successfully registered VPI module
}
}
fprintf (stderr, "vlog_startup_routines not found\n");
return -1; // failed to register VPI module
}
PLI_INT32
vpi_vprintf (char *fmt, va_list ap)
{
return vprintf (fmt, ap);
}
PLI_INT32
vpi_printf (char *fmt, ...)
{
va_list params;
PLI_INT32 res;
va_start (params, fmt);
res = vprintf (fmt, params);
va_end (params);
return res;
}
PLI_INT32
vpi_control (int op, ...)
{
va_list params;
int status;
PLI_INT32 res;
va_start (params, op);
status = va_arg (params, int);
res = vpi_control_np (op, status);
va_end (params);
return res;
}
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