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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>
//-----------------------------------------------------------------------------
// VPI callback functions
typedef void *vpiHandle, *p_vpi_time, *p_vpi_value;
typedef struct t_cb_data {
int reason;
int (*cb_rtn)(struct t_cb_data*cb);
vpiHandle obj;
p_vpi_time time;
p_vpi_value value;
int index;
char*user_data;
} s_cb_data, *p_cb_data;
//-----------------------------------------------------------------------------
// vpi thunking a la Icarus Verilog
#include <stdarg.h>
typedef void *s_vpi_time, *p_vpi_vlog_info, *p_vpi_error_info;
#define VPI_THUNK_MAGIC (0x87836BA5)
struct t_vpi_systf_data;
void vpi_register_systf (const struct t_vpi_systf_data*ss);
void vpi_vprintf (const char*fmt, va_list ap);
unsigned int vpi_mcd_close (unsigned int mcd);
char * vpi_mcd_name (unsigned int mcd);
unsigned int vpi_mcd_open (char *name);
unsigned int vpi_mcd_open_x (char *name, char *mode);
int vpi_mcd_vprintf (unsigned int mcd, const char*fmt, va_list ap);
int vpi_mcd_fputc (unsigned int mcd, unsigned char x);
int vpi_mcd_fgetc (unsigned int mcd);
vpiHandle vpi_register_cb (p_cb_data data);
int vpi_remove_cb (vpiHandle ref);
void vpi_sim_vcontrol (int operation, va_list ap);
vpiHandle vpi_handle (int type, vpiHandle ref);
vpiHandle vpi_iterate (int type, vpiHandle ref);
vpiHandle vpi_scan (vpiHandle iter);
vpiHandle vpi_handle_by_index (vpiHandle ref, int index);
void vpi_get_time (vpiHandle obj, s_vpi_time*t);
int vpi_get (int property, vpiHandle ref);
char* vpi_get_str (int property, vpiHandle ref);
void vpi_get_value (vpiHandle expr, p_vpi_value value);
vpiHandle vpi_put_value (vpiHandle obj, p_vpi_value value,
p_vpi_time when, int flags);
int vpi_free_object (vpiHandle ref);
int vpi_get_vlog_info (p_vpi_vlog_info vlog_info_p);
int vpi_chk_error (p_vpi_error_info info);
vpiHandle vpi_handle_by_name (char *name, vpiHandle scope);
typedef struct {
int magic;
void (*vpi_register_systf) (const struct t_vpi_systf_data*ss);
void (*vpi_vprintf) (const char*fmt, va_list ap);
unsigned int (*vpi_mcd_close) (unsigned int mcd);
char* (*vpi_mcd_name) (unsigned int mcd);
unsigned int (*vpi_mcd_open) (char *name);
unsigned int (*vpi_mcd_open_x) (char *name, char *mode);
int (*vpi_mcd_vprintf) (unsigned int mcd, const char*fmt, va_list ap);
int (*vpi_mcd_fputc) (unsigned int mcd, unsigned char x);
int (*vpi_mcd_fgetc) (unsigned int mcd);
vpiHandle (*vpi_register_cb) (p_cb_data data);
int (*vpi_remove_cb) (vpiHandle ref);
void (*vpi_sim_vcontrol) (int operation, va_list ap);
vpiHandle (*vpi_handle) (int type, vpiHandle ref);
vpiHandle (*vpi_iterate) (int type, vpiHandle ref);
vpiHandle (*vpi_scan) (vpiHandle iter);
vpiHandle (*vpi_handle_by_index)(vpiHandle ref, int index);
void (*vpi_get_time) (vpiHandle obj, s_vpi_time*t);
int (*vpi_get) (int property, vpiHandle ref);
char* (*vpi_get_str) (int property, vpiHandle ref);
void (*vpi_get_value) (vpiHandle expr, p_vpi_value value);
vpiHandle (*vpi_put_value) (vpiHandle obj, p_vpi_value value,
p_vpi_time when, int flags);
int (*vpi_free_object) (vpiHandle ref);
int (*vpi_get_vlog_info) (p_vpi_vlog_info vlog_info_p);
int (*vpi_chk_error) (p_vpi_error_info info);
vpiHandle (*vpi_handle_by_name) (char *name, vpiHandle scope);
} vpi_thunk, *p_vpi_thunk;
int vpi_register_sim(p_vpi_thunk tp);
static vpi_thunk thunkTable =
{ VPI_THUNK_MAGIC,
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,
0, //vpi_chk_error,
0 //vpi_handle_by_name
};
//-----------------------------------------------------------------------------
// 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
int
loadVpiModule (const char* modulename)
{
static const char * const vpitablenames[] =
{
"_vlog_startup_routines", // with leading underscore: MacOSX
"vlog_startup_routines" // w/o leading underscore: Linux
};
static const char * const vpithunknames[] =
{
"_vpi_register_sim", // with leading underscore: MacOSX
"vpi_register_sim" // w/o leading underscore: Linux
};
int i;
void* vpimod;
fprintf (stderr, "loading VPI module '%s'\n", modulename);
vpimod = module_open (modulename);
if (vpimod == NULL)
{
const char *msg;
msg = module_error ();
fprintf (stderr, "%s\n", msg == NULL ? "unknown dlopen error" : msg);
return -1;
}
for (i = 0; i < 2; i++) // try with and w/o leading underscores
{
void* vpithunk;
void* vpitable;
vpitable = module_symbol (vpimod, vpitablenames[i]);
vpithunk = module_symbol (vpimod, vpithunknames[i]);
if (vpithunk)
{
typedef int (*funT)(p_vpi_thunk tp);
funT regsim;
regsim = (funT)vpithunk;
regsim (&thunkTable);
}
else
{
// this is not an error, as the register-mechanism
// is not standardized
}
if (vpitable)
{
unsigned int tmp;
//extern void (*vlog_startup_routines[])();
typedef void (*vlog_startup_routines_t)(void);
vlog_startup_routines_t *vpifuns;
vpifuns = (vlog_startup_routines_t*)vpitable;
for (tmp = 0; vpifuns[tmp]; tmp++)
{
vpifuns[tmp]();
}
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
}
void
vpi_printf (const char *fmt, ...)
{
va_list params;
va_start (params, fmt);
vprintf (fmt, params);
va_end (params);
}
//-----------------------------------------------------------------------------
// end of file
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