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added support for gds layers and pselect/nselect layers
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@rmanohar
rmanohar committed May 23, 2020
1 parent 368bd59 commit b854c25
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Showing 5 changed files with 393 additions and 21 deletions.
114 changes: 111 additions & 3 deletions act/tech.cc
View file
Original file line number Diff line number Diff line change
Expand Up @@ -81,7 +81,8 @@ void Technology::Init (const char *s)
{
int i, j, k, sz;
const char *tables[] = { "diff.ntype", "diff.ptype", "diff.nfet", "diff.pfet",
"diff.nfet_well", "diff.pfet_well" };
"diff.nfet_well", "diff.pfet_well",
"diff.nselect", "diff.pselect" };

char **diff;
const char *prefix = "layout";
Expand Down Expand Up @@ -145,6 +146,41 @@ void Technology::Init (const char *s)
T->welltap_adjust = 0;
}

T->gdsH = NULL;
/* -- read GDS layers -- */
tech_strname (prefix, "gds.layers");
if (config_exists (buf)) {
T->gdsH = hash_new (16);
char **layers = config_get_table_string (buf);
int sz = config_get_table_size (buf);

tech_strname (prefix, "gds.major");
int *maj = config_get_table_int (buf);

if (config_get_table_size (buf) != sz) {
fatal_error ("gds.major table size should match gds.layers");
}

tech_strname (prefix, "gds.minor");
int *min = config_get_table_int (buf);

if (config_get_table_size (buf) != sz) {
fatal_error ("gds.minor table size should match gds.layers");
}


for (int i=0; i < sz; i++) {
hash_bucket_t *b;
b = hash_lookup (T->gdsH, layers[i]);
if (b) {
fatal_error ("Duplicate GDS layer name `%s'", layers[i]);
}
b = hash_add (T->gdsH, layers[i]);
b->v = new GDSLayer (layers[i], maj[i], min[i]);
}
}


tech_strname (prefix, "diff.types");
sz = config_get_table_size (buf);
if (sz < 1) {
Expand All @@ -171,20 +207,50 @@ void Technology::Init (const char *s)
MALLOC (T->well[i], WellMat *, sz);
MALLOC (T->fet[i], FetMat *, sz);
MALLOC (T->welldiff[i], DiffMat *, sz);
MALLOC (T->sel[i], Material *, sz);
}

for (i=0; i < sizeof(tables)/sizeof (tables[0]); i++) {
tech_strname (prefix, tables[i]);
if (i == 6 || i == 7) { /* selects are optional */
if (!config_exists (buf)) {
continue;
}
}
if (sz != config_get_table_size (buf)) {
fatal_error ("Table `%s' is not the same size is the type table", buf);
}
config_get_table_string (buf);
}

#define ADDGDS_TEMPL(mat) \
do { \
if (config_exists (buf)) { \
mat->addGDS (config_get_table_string (buf), \
config_get_table_size (buf)); \
} \
else { \
warning ("No GDS information: `%s'", buf); \
} \
} while (0)

#define ADDGDS(mat,name) \
do { \
if (T->gdsH) { \
snprintf (buf+k, BUF_SZ-k-1, "%s.gds", name); \
ADDGDS_TEMPL(mat); \
} \
} while (0)

/* now: check materials! */
for (i=0; i < 6; i++) {
for (i=0; i < 8; i++) {
tech_strname (prefix, tables[i]);
if (i == 6 || i == 7) {
if (!config_exists (buf)) {
continue;
}
}

diff = config_get_table_string (buf);
tech_strname (prefix, "materials.");
k = strlen (buf);
Expand All @@ -197,6 +263,7 @@ void Technology::Init (const char *s)

DiffMat *mat;
mat = T->diff[i][j] = new DiffMat (diff[j]);
ADDGDS(mat, diff[j]);

snprintf (buf+k, BUF_SZ-k-1, "%s.width", diff[j]);
mat->width = config_get_int (buf);
Expand Down Expand Up @@ -246,6 +313,7 @@ void Technology::Init (const char *s)
else if (i < 4) {
FetMat *mat;
mat = T->fet[i-2][j] = new FetMat (diff[j]);
ADDGDS(mat, diff[j]);

/* pfet/nfet: transistors */
snprintf (buf+k, BUF_SZ-k-1, "%s.width", diff[j]);
Expand Down Expand Up @@ -303,6 +371,8 @@ void Technology::Init (const char *s)
has_welldiff = 1;

mat = T->welldiff[i-4][j] = new DiffMat (diff[j]+ik+1);
ADDGDS(mat, diff[j]+ik+1);

snprintf (buf+k, BUF_SZ-k+1, "%s.width", diff[j]+ik+1);
mat->width = config_get_int (buf);

Expand Down Expand Up @@ -342,6 +412,7 @@ void Technology::Init (const char *s)

WellMat *mat;
mat = T->well[i-4][j] = new WellMat (Strdup (ldiff));
ADDGDS (mat, ldiff);

snprintf (buf+k, BUF_SZ-k-1, "%s.width", ldiff);
if (config_get_int (buf) < 1) {
Expand Down Expand Up @@ -410,6 +481,16 @@ void Technology::Init (const char *s)
T->welldiff[i-4][j] = NULL; /* no welldiff */
}
}
else {
if (diff) {
/* selects */
T->sel[i-6][j] = new Material (diff[j]);
ADDGDS (T->sel[i-6][j], diff[j]);
}
else {
T->sel[i-6][j] = NULL;
}
}
}
}

Expand All @@ -420,7 +501,8 @@ void Technology::Init (const char *s)

PolyMat *pmat = new PolyMat (Strdup ("polysilicon"));
T->poly = pmat;

ADDGDS (T->poly, "polysilicon");

snprintf (buf+k, BUF_SZ-k-1, "width");
if (config_get_int (buf) < 1) {
fatal_error ("%s: minimum width has to be at least 1", buf);
Expand Down Expand Up @@ -569,6 +651,11 @@ void Technology::Init (const char *s)
mat = new RoutingMat (Strdup (buf+k));
T->metal[i-1] = mat;

if (T->gdsH) {
snprintf (buf+k, BUF_SZ-k-1, "m%d_gds", i);
ADDGDS_TEMPL(mat);
}

if (i != T->nmetals) {
A_NEW (contacts, char *);
A_NEXT (contacts) = Strdup (buf+k);
Expand Down Expand Up @@ -726,6 +813,11 @@ void Technology::Init (const char *s)
cmat->lower = NULL;
cmat->upper = NULL;

if (T->gdsH) {
snprintf (buf+k, BUF_SZ-k-1, "%s_gds", contacts[i]);
ADDGDS_TEMPL(cmat);
}

snprintf (buf+k, BUF_SZ-k-1, "%s", contacts[i]);
t = config_get_string (buf);

Expand Down Expand Up @@ -954,3 +1046,19 @@ int Technology::getMaxSameDiffSpacing ()
}
return spc;
}

void Material::addGDS (char **layers, int sz)
{
hash_bucket_t *b;
Assert (Technology::T->gdsH, "What?");
Assert (!gds, "What?");

gds = list_new ();
for (int i=0; i < sz; i++) {
b = hash_lookup (Technology::T->gdsH, layers[i]);
if (!b) {
fatal_error ("Could not find GDS layer `%s'", layers[i]);
}
list_append (gds, b->v);
}
}
36 changes: 30 additions & 6 deletions act/tech.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -61,12 +61,29 @@ class RangeTable {

class Contact;


class GDSLayer {
private:
const char *name;
int major, minor;
public:
GDSLayer (char *nm, int maj, int min) {
name = string_cache (nm);
major = maj;
minor = min;
}
};


class Material {
public:
Material() {
name = NULL;
gds[0] = -1;
gds[1] = -1;
Material(const char *nm = NULL) {
if (nm) {
name = string_cache (nm);
}
else {
name = NULL;
}
width = NULL;
spacing = NULL;
minarea = 0;
Expand All @@ -80,13 +97,15 @@ class Material {
runlength_mode = -1;
parallelrunlength = NULL;
spacing_aux = NULL;
gds = NULL;
}

const char *getName() { return name; }


void addGDS (char **table, int sz);

protected:
const char *name; /* drawing name in magic */
int gds[2]; /* gds ids */

RangeTable *width; /* min width (indexed by length) */
RangeTable *spacing; /* min spacing (indexed by width) */
Expand All @@ -106,6 +125,8 @@ class Material {

Contact *viaup, *viadn;

list_t *gds; // GDS layer list

friend class Technology;
};

Expand Down Expand Up @@ -314,11 +335,14 @@ class Technology {
WellMat **well[2]; /* device wells */
DiffMat **welldiff[2]; /* substrate diffusion */
FetMat **fet[2]; /* transistors for each type */
Material **sel[2]; /* selects for each diffusion */

PolyMat *poly;

RoutingMat **metal;

struct Hashtable *gdsH; /* gds layers */

int getMaxDiffSpacing (); /* this space guarantees correct
spacing between any two types of
diffusion (not including welldiff) */
Expand Down
4 changes: 2 additions & 2 deletions tech/Makefile
View file
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#-------------------------------------------------------------------------
#
# Copyright (c) 2018-2019 Rajit Manohar
# Copyright (c) 2018-2020 Rajit Manohar
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
Expand Down Expand Up @@ -28,7 +28,7 @@ OBJS=$(SRCS:.cc=.o)

include $(VLSI_TOOLS_SRC)/scripts/Makefile.std

$(EXE): $(OBJS) $(LIBACTDEPEND)
$(EXE): $(OBJS) $(ACTDEPEND)
$(CXX) $(OBJS) -o $(EXE) $(LIBACT)

-include Makefile.deps
2 changes: 2 additions & 0 deletions tech/layout.conf
View file
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,8 @@ begin diff
string_table pfet_well "nwell:nndiff" # well for p-fet, and nplus diff
string_table nfet "ntransistor" # fets
string_table nfet_well "pwell:ppdiff" # pwell, pplus diff
string_table pselect "pplus" # select layers
string_table nselect "nplus"
end

begin materials
Expand Down
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