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iverilog/vpi/sys_sdf.c

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/*
* Copyright (c) 2007-2014 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "sys_priv.h"
# include "sdf_priv.h"
# include <stdlib.h>
# include <string.h>
# include <assert.h>
/*
* These are static context
*/
int sdf_flag_warning = 0;
int sdf_flag_inform = 0;
int sdf_min_typ_max;
/* Scope of the $sdf_annotate call. Annotation starts here. */
static vpiHandle sdf_scope;
static vpiHandle sdf_callh = 0;
/* The cell in process. */
static vpiHandle sdf_cur_cell;
static vpiHandle find_scope(vpiHandle scope, const char*name)
{
vpiHandle idx = vpi_iterate(vpiModule, scope);
/* If this scope has no modules then it can't have the one we
* are looking for so just return 0. */
if (idx == 0) return 0;
vpiHandle cur;
while ( (cur = vpi_scan(idx)) ) {
if ( strcmp(name, vpi_get_str(vpiName,cur)) == 0) {
vpi_free_object(idx);
return cur;
}
}
return 0;
}
/*
* These functions are called by the SDF parser during parsing to
* handling items discovered in the parse.
*/
void sdf_select_instance(const char*celltype, const char*cellinst)
{
char buffer[128];
/* First follow the hierarchical parts of the cellinst name to
get to the cell that I'm looking for. */
vpiHandle scope = sdf_scope;
const char*src = cellinst;
const char*dp;
while ( (dp=strchr(src, '.')) ) {
unsigned len = dp - src;
assert(dp >= src);
assert(len < sizeof buffer);
strncpy(buffer, src, len);
buffer[len] = 0;
vpiHandle tmp_scope = find_scope(scope, buffer);
if (tmp_scope == 0) {
vpi_printf("SDF WARNING: %s:%d: ",
vpi_get_str(vpiFile, sdf_callh),
(int)vpi_get(vpiLineNo, sdf_callh));
vpi_printf("Cannot find %s in scope %s.\n",
buffer, vpi_get_str(vpiFullName, scope));
break;
}
assert(tmp_scope);
scope = tmp_scope;
src = dp + 1;
}
/* Now find the cell. */
if (src[0] == 0)
sdf_cur_cell = sdf_scope;
else
sdf_cur_cell = find_scope(scope, src);
if (sdf_cur_cell == 0) {
vpi_printf("SDF WARNING: %s:%d: ", vpi_get_str(vpiFile, sdf_callh),
(int)vpi_get(vpiLineNo, sdf_callh));
vpi_printf("Unable to find %s in scope %s.\n",
src, vpi_get_str(vpiFullName, scope));
return;
}
/* The scope that matches should be a module. */
if (vpi_get(vpiType,sdf_cur_cell) != vpiModule) {
vpi_printf("SDF WARNING: %s:%d: ", vpi_get_str(vpiFile, sdf_callh),
(int)vpi_get(vpiLineNo, sdf_callh));
vpi_printf("Scope %s in %s is not a module.\n",
src, vpi_get_str(vpiFullName, scope));
}
/* The matching scope (a module) should have the expected type. */
if (strcmp(celltype,vpi_get_str(vpiDefName,sdf_cur_cell)) != 0) {
vpi_printf("SDF WARNING: %s:%d: ", vpi_get_str(vpiFile, sdf_callh),
(int)vpi_get(vpiLineNo, sdf_callh));
vpi_printf("Module %s in %s is not a %s; it is a ", src,
vpi_get_str(vpiFullName, scope), celltype);
vpi_printf("%s\n", vpi_get_str(vpiDefName, sdf_cur_cell));
}
}
static const char*edge_str(int vpi_edge)
{
if (vpi_edge == vpiNoEdge)
return "";
if (vpi_edge == vpiPosedge)
return "posedge ";
if (vpi_edge == vpiNegedge)
return "negedge ";
return "edge.. ";
}
void sdf_iopath_delays(int vpi_edge, const char*src, const char*dst,
const struct sdf_delval_list_s*delval_list)
{
vpiHandle iter, path;
int match_count = 0;
if (sdf_cur_cell == 0)
return;
iter = vpi_iterate(vpiModPath, sdf_cur_cell);
/* Search for the modpath that matches the IOPATH by looking
for the modpath that uses the same ports as the ports that
the parser has found. */
if (iter) while ( (path = vpi_scan(iter)) ) {
s_vpi_delay delays;
struct t_vpi_time delay_vals[12];
int idx;
vpiHandle path_t_in = vpi_handle(vpiModPathIn,path);
vpiHandle path_t_out = vpi_handle(vpiModPathOut,path);
vpiHandle path_in = vpi_handle(vpiExpr,path_t_in);
vpiHandle path_out = vpi_handle(vpiExpr,path_t_out);
/* The expressions for the path terms must be signals,
vpiNet or vpiReg. */
assert(vpi_get(vpiType,path_in) == vpiNet);
assert(vpi_get(vpiType,path_out) == vpiNet
|| vpi_get(vpiType,path_out) == vpiReg);
/* If the src name doesn't match, go on. */
if (strcmp(src,vpi_get_str(vpiName,path_in)) != 0)
continue;
/* The edge type must match too. But note that if this
IOPATH has no edge, then it matches with all edges of
the modpath object. */
/* --> Is this correct in the context of the 10, 01, etc. edges? */
if (vpi_edge != vpiNoEdge && vpi_get(vpiEdge,path_t_in) != vpi_edge)
continue;
/* If the dst name doesn't match, go on. */
if (strcmp(dst,vpi_get_str(vpiName,path_out)) != 0)
continue;
/* Ah, this must be a match! */
delays.da = delay_vals;
delays.no_of_delays = delval_list->count;
delays.time_type = vpiScaledRealTime;
delays.mtm_flag = 0;
delays.append_flag = 0;
delays.plusere_flag = 0;
vpi_get_delays(path, &delays);
for (idx = 0 ; idx < delval_list->count ; idx += 1) {
delay_vals[idx].type = vpiScaledRealTime;
if (delval_list->val[idx].defined) {
delay_vals[idx].real = delval_list->val[idx].value;
}
}
vpi_put_delays(path, &delays);
match_count += 1;
}
if (match_count == 0) {
vpi_printf("SDF WARNING: %s:%d: ", vpi_get_str(vpiFile, sdf_callh),
(int)vpi_get(vpiLineNo, sdf_callh));
vpi_printf("Unable to match ModPath %s%s -> %s in %s\n",
edge_str(vpi_edge), src, dst,
vpi_get_str(vpiFullName, sdf_cur_cell));
}
}
static void check_command_line_args(void)
{
struct t_vpi_vlog_info vlog_info;
int idx;
static int sdf_command_line_done = 0;
if (sdf_command_line_done)
return;
vpi_get_vlog_info(&vlog_info);
for (idx = 0 ; idx < vlog_info.argc ; idx += 1) {
if (strcmp(vlog_info.argv[idx],"-sdf-warn") == 0) {
sdf_flag_warning = 1;
} else if (strcmp(vlog_info.argv[idx],"-sdf-info") == 0) {
sdf_flag_inform = 1;
} else if (strcmp(vlog_info.argv[idx],"-sdf-verbose") == 0) {
sdf_flag_warning = 1;
sdf_flag_inform = 1;
}
}
sdf_command_line_done = 1;
}
static PLI_INT32 sys_sdf_annotate_compiletf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall,0);
vpiHandle argv = vpi_iterate(vpiArgument, callh);
vpiHandle module;
check_command_line_args();
/* Check that we have a file name argument. */
if (argv == 0) {
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s requires a file name argument.\n", name);
vpi_control(vpiFinish, 1);
return 0;
}
if (! is_string_obj(vpi_scan(argv))) {
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s's file name must be a string.\n", name);
vpi_control(vpiFinish, 1);
}
/* The module argument is optional. */
module = vpi_scan(argv);
if (module == 0) return 0;
if (vpi_get(vpiType, module) != vpiModule) {
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s's second argument must be a module instance.\n",
name);
vpi_control(vpiFinish, 1);
}
/* Warn the user that we only use the first two arguments. */
if (vpi_scan(argv) != 0) {
vpi_printf("WARNING: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s currently only uses the first two argument.\n",
name);
vpi_free_object(argv);
}
return 0;
}
static PLI_INT32 sys_sdf_annotate_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle argv = vpi_iterate(vpiArgument, callh);
FILE *sdf_fd;
char *fname = get_filename(callh, name, vpi_scan(argv));
if (fname == 0) return 0;
sdf_fd = fopen(fname, "r");
if (sdf_fd == 0) {
vpi_printf("WARNING: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("Unable to open SDF file \"%s\"."
" Skipping this annotation.\n", fname);
return 0;
}
/* The optional second argument is the scope to annotate. */
sdf_scope = vpi_scan(argv);
if (sdf_scope) vpi_free_object(argv);
else sdf_scope = vpi_handle(vpiScope, callh);
/* Select which delay to use. */
sdf_min_typ_max = vpi_get(_vpiDelaySelection, 0);
sdf_cur_cell = 0;
sdf_callh = callh;
sdf_process_file(sdf_fd, fname);
sdf_callh = 0;
fclose(sdf_fd);
free(fname);
return 0;
}
void sys_sdf_register()
{
s_vpi_systf_data tf_data;
vpiHandle res;
tf_data.type = vpiSysTask;
tf_data.tfname = "$sdf_annotate";
tf_data.calltf = sys_sdf_annotate_calltf;
tf_data.compiletf = sys_sdf_annotate_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$sdf_annotate";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
}
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