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Closes #4: Add support for hierarchical addrmaps

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Every time an addrmap is detected within another addrmap, a new context
will be opened and a separate RTL file will be created.

All addrmaps will have the same bus-wdiget, but it might be possible
that different addrmaps have different maximum regwidths. For that
reason, it was necessary to change the non-generic srd2sv_if_pkg to a
parametrizable interface.

Almost all changes to the templates in this commit are due to name
changes from 'b2r' and 'r2b' to 'widget_if'.
This commit is contained in:
Dennis Potter 2021-10-27 23:27:29 -07:00
parent ac693f0c02
commit 85f7808362
Signed by: Dennis
GPG Key ID: 186A8AD440942BAF
14 changed files with 203 additions and 196 deletions
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63
srdl2sv/components/addrmap.py
View File

@ -30,6 +30,9 @@ class AddrMap(Component):
parents_strides=None,
parents_dimensions=None)
# Name of addrmap should always be the object's name and not the name of the instance
self.name = obj.type_name
# Check if global resets are defined
glbl_settings = {}
@ -47,6 +50,8 @@ class AddrMap(Component):
# Empty dictionary of register objects
# We need a dictionary since it might be required to access the objects later
# by name (for example, in case of aliases)
self.addrmap_ids = {}
self.addrmaps = []
self.registers = {}
self.regfiles = {}
self.mems = {}
@ -54,12 +59,34 @@ class AddrMap(Component):
# Traverse through children
for child in self.obj.children():
print(child)
new_child = None
if isinstance(child, node.AddrmapNode):
# This addressmap opens a completely new scope. For example,
# a field_reset does not propagate through to this scope.
self.logger.info('Found hierarchical addrmap. Entering it...')
self.logger.error('Child addrmaps are not implemented yet!')
#
# We only need to create files for objects, not for instantiations.
# For that reason, scan if we already created an instance of this
# object.
if child.type_name not in self.addrmap_ids:
self.logger.info("Found hierarchical addrmap of type '%s' " \
". Entering it...", child.type_name)
# Save unique ID of object to dictionary
self.addrmap_ids[child.type_name] = id(child.inst.original_def)
# Create addrmap object
self.addrmaps.append(AddrMap(obj=child, config=config))
elif id(child.inst.original_def) == self.addrmap_ids[child.type_name]:
self.logger.info("Found another instance of addrmap '%s'. " \
"Not rebuilding it...", child.type_name)
else:
self.logger.fatal("Found a redeclaration of addrmap '%s'. " \
"This is not supported by srdl2sv because " \
"the compiler will create a seperate SystemVerilog " \
"module for every addrmap object.", child.type_name)
sys.exit(1)
elif isinstance(child, node.RegfileNode):
new_child = RegFile(
obj=child,
@ -77,7 +104,6 @@ class AddrMap(Component):
new_child.sanity_checks()
self.mems[child.inst_name] = new_child
elif isinstance(child, node.RegNode):
print('here')
if child.inst.is_alias:
# If the node we found is an alias, we shall not create a
# new register. Rather, we bury up the old register and add
@ -96,7 +122,7 @@ class AddrMap(Component):
try:
if (regwidth := new_child.get_regwidth()) > self.regwidth:
self.regwidth = regwidth
except (KeyError, UnboundLocalError):
except (KeyError, UnboundLocalError, AttributeError):
# Simply ignore nodes like SignalNodes
pass
@ -178,11 +204,7 @@ class AddrMap(Component):
# Define packages to be included. Always include the
# b2w and w2b defines.
import_package_list = [
AddrMap.templ_dict['import_package']['rtl'].format(
name = 'srdl2sv_if'),
'\n'
]
import_package_list = []
try:
for pkg_name in self.__get_package_names():
@ -195,7 +217,11 @@ class AddrMap(Component):
except IndexError:
pass
try:
import_package_list.pop()
except IndexError:
# If there are no packages, an IndexError is expected
pass
self.rtl_header.append(
AddrMap.templ_dict['header'].format(
@ -243,17 +269,17 @@ class AddrMap(Component):
for child in self.children.values():
for mux_entry_dim in child.create_mux_string():
# Data structure of mux_entry:
r2b_data = ''.join([mux_entry_dim.mux_entry.data_wire, mux_entry_dim.dim])
r2b_rdy = ''.join([mux_entry_dim.mux_entry.rdy_wire, mux_entry_dim.dim])
r2b_err = ''.join([mux_entry_dim.mux_entry.err_wire, mux_entry_dim.dim])
widget_if_r_data = ''.join([mux_entry_dim.mux_entry.data_wire, mux_entry_dim.dim])
widget_if_rdy = ''.join([mux_entry_dim.mux_entry.rdy_wire, mux_entry_dim.dim])
widget_if_err = ''.join([mux_entry_dim.mux_entry.err_wire, mux_entry_dim.dim])
active_wire = ''.join([mux_entry_dim.mux_entry.active_wire, mux_entry_dim.dim])
list_of_cases.append(
AddrMap.templ_dict['list_of_mux_cases']['rtl'].format(
active_wire = active_wire,
r2b_data = r2b_data,
r2b_rdy = r2b_rdy,
r2b_err = r2b_err)
widget_if_r_data = widget_if_r_data,
widget_if_rdy = widget_if_rdy,
widget_if_err = widget_if_err)
)
# Define default case
@ -410,3 +436,8 @@ class AddrMap(Component):
real_tabs)
return rtl_return
def get_addrmaps(self) -> []:
self.logger.debug("Returning addrmaps")
return [self, *[y for x in self.addrmaps for y in x.get_addrmaps()]]

8
srdl2sv/components/register.py
View File

@ -215,8 +215,8 @@ class Register(Component):
# an error.
#
# Furthermore, consider an error indication that is set for external registers
bytes_read_format = [f"b2r.byte_en[{x}]" for x in list(map(str, bytes_read))]
bytes_written_format = [f"b2r.byte_en[{x}]" for x in list(map(str, bytes_written))]
bytes_read_format = [f"widget_if.byte_en[{x}]" for x in list(map(str, bytes_read))]
bytes_written_format = [f"widget_if.byte_en[{x}]" for x in list(map(str, bytes_written))]
sw_err_condition_vec = []
@ -270,7 +270,7 @@ class Register(Component):
sw_rdy_condition_vec.append(' && ')
sw_rdy_condition_vec.pop()
sw_rdy_condition_vec.append(' && b2r.r_vld)')
sw_rdy_condition_vec.append(' && widget_if.r_vld)')
if bytes_read and bytes_written:
sw_rdy_condition_vec.append(' || ')
@ -290,7 +290,7 @@ class Register(Component):
sw_rdy_condition_vec.append(' && ')
sw_rdy_condition_vec.pop()
sw_rdy_condition_vec.append(' && b2r.w_vld)')
sw_rdy_condition_vec.append(' && widget_if.w_vld)')
sw_rdy_condition = ''.join(sw_rdy_condition_vec)
else:

12
srdl2sv/components/templates/addrmap.yaml
View File

@ -129,15 +129,15 @@ default_mux_case:
default:
begin
// If the address is not found, return an error
r2b.data = 0;
r2b.err = 1;
r2b.rdy = b2r.r_vld || b2r.w_vld;
widget_if.r_data = 0;
widget_if.err = 1;
widget_if.rdy = widget_if.r_vld || widget_if.w_vld;
end
list_of_mux_cases:
rtl: |-
{active_wire}:
begin
r2b.data = {r2b_data};
r2b.err = {r2b_err};
r2b.rdy = {r2b_rdy};
widget_if.r_data = {widget_if_r_data};
widget_if.err = {widget_if_err};
widget_if.rdy = {widget_if_rdy};
end

32
srdl2sv/components/templates/fields.yaml
View File

@ -29,9 +29,9 @@ sw_access_field_swwel:
begin
sw_access_byte:
rtl: |-
if (b2r.byte_en[{i}])
if (widget_if.byte_en[{i}])
<<INDENT>>
{path}_q{genvars}[{msb_field}:{lsb_field}] <= b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= widget_if.w_data[{msb_bus}:{lsb_bus}];
<<UNINDENT>>
signals:
- name: '{path}_q'
@ -113,33 +113,33 @@ end_field_ff:
end // of {path}'s always_ff
OnWriteType.woset:
rtl: |-
if (b2r.byte_en[{i}]) // woset property
if (widget_if.byte_en[{i}]) // woset property
begin
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] | b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] | widget_if.w_data[{msb_bus}:{lsb_bus}];
end
OnWriteType.woclr:
rtl: |-
if (b2r.byte_en[{i}]) // woclr property
if (widget_if.byte_en[{i}]) // woclr property
begin
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] & ~b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] & ~widget_if.w_data[{msb_bus}:{lsb_bus}];
end
OnWriteType.wot:
rtl: |-
if (b2r.byte_en[{i}]) // wot property
if (widget_if.byte_en[{i}]) // wot property
begin
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] ^ b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] ^ widget_if.w_data[{msb_bus}:{lsb_bus}];
end
OnWriteType.wzs:
rtl: |-
if (b2r.byte_en[{i}]) // wzs property
if (widget_if.byte_en[{i}]) // wzs property
begin
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] & b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] & widget_if.w_data[{msb_bus}:{lsb_bus}];
end
OnWriteType.wzt:
rtl: |-
if (b2r.byte_en[{i}]) // wzt property
if (widget_if.byte_en[{i}]) // wzt property
begin
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] ~^ b2r.data[{msb_bus}:{lsb_bus}];
{path}_q{genvars}[{msb_field}:{lsb_field}] <= {path}_q{genvars}[{msb_field}:{lsb_field}] ~^ widget_if.w_data[{msb_bus}:{lsb_bus}];
end
OnWriteType.wclr:
rtl: |-
@ -216,7 +216,7 @@ swacc_assign:
rtl: |-
// Combinational block to generate swacc-output signals
assign {path}_swacc{genvars} = ({path_wo_field}__any_alias_sw_wr{genvars} || {path_wo_field}__any_alias_sw_rd{genvars}) && |b2r.byte_en[{msbyte}:{lsbyte}];
assign {path}_swacc{genvars} = ({path_wo_field}__any_alias_sw_wr{genvars} || {path_wo_field}__any_alias_sw_rd{genvars}) && |widget_if.byte_en[{msbyte}:{lsbyte}];
output_ports:
- name: '{path}_swacc'
signal_type: 'logic'
@ -234,7 +234,7 @@ swmod_always_comb:
signal_type: 'logic'
swmod_assign:
rtl: |-
{path}_swmod{genvars} |= {path_wo_field}__any_alias_sw_{rd_wr}{genvars} && |b2r.byte_en[{msbyte}:{lsbyte}];
{path}_swmod{genvars} |= {path_wo_field}__any_alias_sw_{rd_wr}{genvars} && |widget_if.byte_en[{msbyte}:{lsbyte}];
output_ports:
- name: '{path}_swmod'
signal_type: 'logic'
@ -454,7 +454,7 @@ external_wr_assignments:
assign {path}_ext_w_req{genvars} = {path_wo_field}_sw_wr{genvars};
// Assign value from bus to output
assign {path}_ext_w_data{genvars} = b2r.data[{msb_bus}:{lsb_bus}];
assign {path}_ext_w_data{genvars} = widget_if.w_data[{msb_bus}:{lsb_bus}];
// Provide bit-wise mask. Only bits set to 1'b1 shall be written
assign {path}_ext_w_mask{genvars} = {{{mask}}};
@ -472,7 +472,7 @@ external_wr_assignments:
signal_type: ''
external_wr_mask_segment:
rtl: |-
{{{width}{{b2r.byte_en[{idx}]}}}}
{{{width}{{widget_if.byte_en[{idx}]}}}}
trigger_input:
rtl: |-
{path}_in

8
srdl2sv/components/templates/memory.yaml
View File

@ -36,7 +36,7 @@ memory_adr_assignments:
* The address is divided so that byte-addresses are
* translated full memory entries
*/
assign {path}_mem_address = (b2r.addr - {lower_bound}) / {bytes_w};
assign {path}_mem_address = (widget_if.addr - {lower_bound}) / {bytes_w};
assign {path}_mem_active = {path}_mem_address >= {lower_bound} && {path}_mem_address < {upper_bound};
signals:
@ -65,7 +65,7 @@ memory_rd_assignments:
* complete time '{path}_mem_r_ack' is high.
*/
// Request read signal
assign {path}_mem_r_req = {path}_mem_active && b2r.r_vld;
assign {path}_mem_r_req = {path}_mem_active && widget_if.r_vld;
input_ports:
- name: '{path}_mem_r_data'
signal_type: '[{data_w}:0]'
@ -99,10 +99,10 @@ memory_wr_assignments:
* complete time '{path}_mem_w_ack' is high.
*/
// Write request
assign {path}_mem_w_req = {path}_mem_active && b2r.w_vld;
assign {path}_mem_w_req = {path}_mem_active && widget_if.w_vld;
// Assign value from bus to output
assign {path}_mem_w_data = b2r.data;
assign {path}_mem_w_data = widget_if.w_data;
output_ports:
- name: '{path}_mem_w_req'
signal_type: 'logic'

12
srdl2sv/components/templates/register.yaml
View File

@ -5,19 +5,19 @@ access_wire_comment:
// Register-activation for '{path}' {alias}
access_wire_assign_1_dim:
rtl: |-
assign {path}_active = b2r.addr == {addr};
assign {path}_active = widget_if.addr == {addr};
signals:
- name: '{path}_active'
signal_type: 'logic'
access_wire_assign_multi_dim:
rtl: |-
assign {path}_active{genvars} = b2r.addr == {addr}+({genvars_sum});
assign {path}_active{genvars} = widget_if.addr == {addr}+({genvars_sum});
signals:
- name: '{path}_active'
signal_type: 'logic'
read_wire_assign:
rtl: |-
assign {path}_sw_rd{genvars} = {path}_active{genvars} && b2r.r_vld;
assign {path}_sw_rd{genvars} = {path}_active{genvars} && widget_if.r_vld;
signals:
- name: '{path}_sw_rd'
signal_type: 'logic'
@ -29,7 +29,7 @@ read_wire_assign_0:
signal_type: 'logic'
write_wire_assign:
rtl: |-
assign {path}_sw_wr{genvars} = {path}_active{genvars} && b2r.w_vld;
assign {path}_sw_wr{genvars} = {path}_active{genvars} && widget_if.w_vld;
signals:
- name: '{path}_sw_wr'
signal_type: 'logic'
@ -92,7 +92,7 @@ sw_rdy_assignment_var_name:
signal_type: 'logic'
sw_err_condition:
rtl: |-
!((b2r.r_vld && ({rd_byte_list_ored})) || (b2r.w_vld && ({wr_byte_list_ored})))
!((widget_if.r_vld && ({rd_byte_list_ored})) || (widget_if.w_vld && ({wr_byte_list_ored})))
sw_data_assignment:
rtl: |-
@ -133,7 +133,7 @@ external_rdy_condition:
signal_type: 'logic'
external_err_condition:
rtl: |-
({path}_ext_{rd_or_wr}_err{genvars} && {path}_ext_{rd_or_wr}_ack{genvars} && b2r.{rd_or_wr}_vld)
({path}_ext_{rd_or_wr}_err{genvars} && {path}_ext_{rd_or_wr}_ack{genvars} && widget_if.{rd_or_wr}_vld)
input_ports:
- name: '{path}_ext_{rd_or_wr}_err'
signal_type: 'logic'

65
srdl2sv/components/widgets/srdl2sv_amba3ahblite.sv
View File

@ -23,20 +23,12 @@
* OTHER DEALINGS IN THE SOFTWARE.
*/
module srdl2sv_amba3ahblite
import srdl2sv_if_pkg::*;
#(
module srdl2sv_amba3ahblite #(
parameter bit FLOP_REGISTER_IF = 0,
parameter BUS_BITS = 32,
parameter NO_BYTE_ENABLE = 0
)
(
// Outputs to internal logic
output b2r_t b2r,
// Inputs from internal logic
input r2b_t r2b,
// Bus protocol
input HCLK,
input HRESETn,
@ -50,7 +42,10 @@ module srdl2sv_amba3ahblite
output logic HREADYOUT,
output logic HRESP,
output logic [BUS_BITS-1:0] HRDATA
output logic [BUS_BITS-1:0] HRDATA,
// Interface to internal logic
srdl2sv_widget_if.widget widget_if
);
localparam BUS_BYTES = BUS_BITS/8;
@ -145,7 +140,7 @@ module srdl2sv_amba3ahblite
// When reading back, the data of the bit that was accessed over the bus
// should be at byte 0 of the HRDATA bus and bits that were not accessed
// should be masked with 0s.
HRDATA_temp = r2b.data >> (8*HADDR_q[BUS_BYTES_W-1:0]);
HRDATA_temp = widget_if.r_data >> (8*HADDR_q[BUS_BYTES_W-1:0]);
for (int i = 0; i < BUS_BYTES; i++)
if (i < (1 << HSIZE_q))
@ -153,8 +148,8 @@ module srdl2sv_amba3ahblite
else
HRDATA[8*(i+1)-1 -: 8] = 8'b0;
b2r_w_vld_next = 0;
b2r_r_vld_next = 0;
widget_if_w_vld_next = 0;
widget_if_r_vld_next = 0;
fsm_next = fsm_q;
case (fsm_q)
@ -175,11 +170,11 @@ module srdl2sv_amba3ahblite
end
FSM_TRANS:
begin
HREADYOUT = r2b.rdy;
b2r_w_vld_next = operation_q == WRITE;
b2r_r_vld_next = operation_q == READ;
HREADYOUT = widget_if.rdy;
widget_if_w_vld_next = operation_q == WRITE;
widget_if_r_vld_next = operation_q == READ;
if (r2b.err && r2b.rdy)
if (widget_if.err && widget_if.rdy)
begin
fsm_next = FSM_ERR_0;
end
@ -201,7 +196,7 @@ module srdl2sv_amba3ahblite
else if (HTRANS == IDLE)
begin
// All done, wrapping things up!
fsm_next = r2b.rdy ? FSM_IDLE : FSM_TRANS;
fsm_next = widget_if.rdy ? FSM_IDLE : FSM_TRANS;
end
end
FSM_ERR_0:
@ -253,14 +248,14 @@ module srdl2sv_amba3ahblite
* Determine the number of active bytes
***/
logic [BUS_BYTES-1:0] HSIZE_bitfielded;
logic [BUS_BYTES-1:0] b2r_byte_en_next;
logic b2r_w_vld_next;
logic b2r_r_vld_next;
logic [BUS_BYTES-1:0] widget_if_byte_en_next;
logic widget_if_w_vld_next;
logic widget_if_r_vld_next;
generate
if (NO_BYTE_ENABLE)
begin
assign b2r_byte_en_next = {BUS_BYTES{1'b1}};
assign widget_if_byte_en_next = {BUS_BYTES{1'b1}};
end
else
begin
@ -270,7 +265,7 @@ module srdl2sv_amba3ahblite
HSIZE_bitfielded[i] = i < (1 << HSIZE_q);
// Shift if not the full bus is accessed
b2r_byte_en_next = HSIZE_bitfielded << (HADDR_q % BUS_BYTES);
widget_if_byte_en_next = HSIZE_bitfielded << (HADDR_q % BUS_BYTES);
end
end
endgenerate
@ -284,29 +279,29 @@ module srdl2sv_amba3ahblite
always_ff @ (posedge HCLK or negedge HRESETn)
if (!HRESETn)
begin
b2r.w_vld <= 1'b0;
b2r.r_vld <= 1'b0;
widget_if.w_vld <= 1'b0;
widget_if.r_vld <= 1'b0;
end
else
begin
b2r.w_vld <= b2r_w_vld_next;
b2r.r_vld <= b2r_r_vld_next;
widget_if.w_vld <= widget_if_w_vld_next;
widget_if.r_vld <= widget_if_r_vld_next;
end
always_ff @ (posedge HCLK)
begin
b2r.addr <= {HADDR_q[31:BUS_BYTES_W], {BUS_BYTES_W{1'b0}}};
b2r.data <= HWDATA << (8*HADDR_q[BUS_BYTES_W-1:0]);
b2r.byte_en <= b2r_byte_en_next;
widget_if.addr <= {HADDR_q[31:BUS_BYTES_W], {BUS_BYTES_W{1'b0}}};
widget_if.w_data <= HWDATA << (8*HADDR_q[BUS_BYTES_W-1:0]);
widget_if.byte_en <= widget_if_byte_en_next;
end
end
else
begin
assign b2r.w_vld = b2r_w_vld_next;
assign b2r.r_vld = b2r_r_vld_next;
assign b2r.addr = {HADDR_q[31:BUS_BYTES_W], {BUS_BYTES_W{1'b0}}};
assign b2r.data = HWDATA << (8*HADDR_q[BUS_BYTES_W-1:0]);
assign b2r.byte_en = b2r_byte_en_next;
assign widget_if.w_vld = widget_if_w_vld_next;
assign widget_if.r_vld = widget_if_r_vld_next;
assign widget_if.addr = {HADDR_q[31:BUS_BYTES_W], {BUS_BYTES_W{1'b0}}};
assign widget_if.w_data = HWDATA << (8*HADDR_q[BUS_BYTES_W-1:0]);
assign widget_if.byte_en = widget_if_byte_en_next;
end
endgenerate

24
srdl2sv/components/widgets/srdl2sv_amba3ahblite.yaml
View File

@ -5,8 +5,8 @@ module_instantiation:
* AMBA 3 AHB Lite Widget
* ======================
* Naming conventions
* - r2b.* -> Signals from registers to bus
* - b2r.* -> Signals from bus to registers
* - widget_if -> SystemVerilog interface to between widgets
* and the internal srdl2sv registers.
* - H* -> Signals as defined in AMBA3 AHB Lite
* specification
* - clk -> Clock that drives registers and the bus
@ -16,13 +16,7 @@ module_instantiation:
.BUS_BITS ({bus_width}),
.NO_BYTE_ENABLE ({no_byte_enable}))
srdl2sv_amba3ahblite_inst
(// Outputs to internal logic
.b2r,
// Inputs from internal logic
.r2b,
// Bus protocol
(// Bus protocol
.HRESETn,
.HCLK (clk),
.HADDR,
@ -35,12 +29,14 @@ module_instantiation:
.HREADYOUT,
.HRESP,
.HRDATA);
.HRDATA,
// Interface to internal logic
.widget_if);
signals:
- name: 'b2r'
signal_type: 'b2r_t'
- name: 'r2b'
signal_type: 'r2b_t'
signals:
- name: 'widget_if'
signal_type: 'srdl2sv_widget_if #(.ADDR_W ({addr_width}), .DATA_W({bus_width}))'
input_ports:
- name: 'clk'
signal_type: ''

17
srdl2sv/components/widgets/srdl2sv_if_pkg.sv
View File

@ -1,17 +0,0 @@
package srdl2sv_if_pkg;
typedef struct packed {{ // .Verilator does not support unpacked structs in packages
logic [{addrwidth}:0] addr;
logic [{regwidth_bit}:0] data;
logic w_vld;
logic r_vld;
logic [ {regwidth_byte}:0] byte_en;
}} b2r_t;
typedef struct packed {{ // .Verilator does not support unpacked structs in packages
logic [{regwidth_bit}:0] data;
logic rdy;
logic err;
}} r2b_t;
endpackage

27
srdl2sv/components/widgets/srdl2sv_simple.yaml
View File

@ -3,26 +3,19 @@ module_instantiation:
rtl: |-
/*******************************************************************
* CPU Interface
* ======================
* Naming conventions
* - r2b.* -> Signals from registers to bus
* - b2r.* -> Signals from bus to registers
* - clk -> Clock that drives registers and the bus
*******************************************************************/
assign b2r.addr = cpuif_address_i;
assign b2r.data = cpuif_data_i;
assign b2r.w_vld = cpuif_wr_vld_i;
assign b2r.r_vld = cpuif_rd_vld_i;
assign b2r.byte_en = {no_byte_enable} ? {{{bus_width_byte}{{1'b1}}}} : cpuif_byte_enable_i;
assign widget_if.addr = cpuif_address_i;
assign widget_if.w_data = cpuif_data_i;
assign widget_if.w_vld = cpuif_wr_vld_i;
assign widget_if.r_vld = cpuif_rd_vld_i;
assign widget_if.byte_en = {no_byte_enable} ? {{{bus_width_byte}{{1'b1}}}} : cpuif_byte_enable_i;
assign cpuif_data_o = r2b.data;
assign cpuif_rdy_o = r2b.rdy;
assign cpuif_err_o = r2b.err;
assign cpuif_data_o = widget_if.r_data;
assign cpuif_rdy_o = widget_if.rdy;
assign cpuif_err_o = widget_if.err;
signals:
- name: 'b2r'
signal_type: 'b2r_t'
- name: 'r2b'
signal_type: 'r2b_t'
- name: 'widget_if'
signal_type: 'srdl2sv_widget_if #(.ADDR_W ({addr_width}), .DATA_W({bus_width}). NO_BYTE_ENABLE({no_byte_enable}))'
input_ports:
- name: 'clk'
signal_type: ''

29
srdl2sv/components/widgets/srdl2sv_widget_if.sv Normal file
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@ -0,0 +1,29 @@
interface srdl2sv_widget_if #(
parameter ADDR_W = 32,
parameter DATA_W = 32
);
localparam DATA_BYTES = DATA_W >> 3;
logic [ADDR_W-1:0] addr;
logic [DATA_W-1:0] w_data;
logic w_vld;
logic r_vld;
logic [DATA_BYTES-1:0] byte_en;
logic [DATA_W-1:0] r_data;
logic rdy;
logic err;
modport widget (
output addr,
output w_data,
output w_vld,
output r_vld,
output byte_en,
input r_data,
input rdy,
input err
);
endinterface

17
srdl2sv/components/widgets/widget_package.sv
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@ -1,17 +0,0 @@
package srdl2sv_widget_pkg;
typedef struct {
logic [31:0] addr;
logic [31:0] data;
logic w_vld;
logic r_vld;
logic [ 3:0] byte_en;
} b2r_t;
typedef struct {
logic [31:0] data;
logic rdy;
logic err;
} r2b_t;
endpackage

41
srdl2sv/srdl2sv.py
View File

@ -44,10 +44,17 @@ def main():
logger.fatal("Could not find '%s'", input_file)
sys.exit(1)
addrmap = AddrMap(root.top, config)
addrmaps = AddrMap(root.top, config)
# Determine address width
if config['addrwidth_bus_spec']:
logger.info("Set address width to '%i', according to '%s' specification",
config['addrwidth'], config['bus'])
else:
logger.info("Set address width to '%i'", config['addrwidth'])
# Save RTL to file
# Start out with addrmap
for addrmap in addrmaps.get_addrmaps():
out_addrmap_file = f"{config['output_dir']}/{addrmap.name}.sv"
with open(out_addrmap_file, 'w', encoding='UTF-8') as file:
@ -71,6 +78,16 @@ def main():
with open(f"{config['output_dir']}/{key}_pkg.sv", 'w', encoding="UTF-8") as file:
print(value, file=file)
# Copy over generic srdl2sv_interface_pkg
widget_if_rtl = pkg_resources.read_text(widgets, "srdl2sv_widget_if.sv")
out_if_file = f"{config['output_dir']}/srdl2sv_widget_if.sv"
with open(out_if_file, 'w', encoding="UTF-8") as file:
print(widget_if_rtl, file=file)
logger.info("Copied 'srdl2sv_widget_if.sv'")
# Copy over widget RTL from widget directory
try:
widget_rtl = pkg_resources.read_text(widgets, f"srdl2sv_{config['bus']}.sv")
@ -85,26 +102,6 @@ def main():
# Bus might not have a corresponding SV file
logger.info("Did not find a seperate SystemVerilog file for '%s' widget", config['bus'])
# Copy over generic srdl2sv_interface_pkg
if config['addrwidth_bus_spec']:
logger.info("Set address width to '%i', according to '%s' specification",
config['addrwidth'], config['bus'])
else:
logger.info("Set address width to '%i'", config['addrwidth'])
widget_if_rtl = pkg_resources.read_text(widgets, 'srdl2sv_if_pkg.sv')
out_if_file = f"{config['output_dir']}/srdl2sv_if_pkg.sv"
with open(out_if_file, 'w', encoding="UTF-8") as file:
widget_if_rtl_parsed = widget_if_rtl.format(
regwidth_bit = addrmap.get_regwidth() - 1,
regwidth_byte = int(addrmap.get_regwidth() / 8) - 1,
addrwidth = config['addrwidth'] - 1)
print(widget_if_rtl_parsed,file=file)
logger.info("Copied 'srdl2sv_if_pkg.sv")
# Print elapsed time
logger.info("Elapsed time: %f seconds", time.time() - start)

4
tests/Makefile
View File

@ -37,9 +37,9 @@ default: $(ALL_COCOTB_TESTS)
build_dirs/%/compile.f: systemrdl/%.rdl
srdl2sv $? --out_dir $(shell dirname $@) --file_log_level DEBUG --stream_log_level DEBUG
ls $(PWD)/$(@D)/*_pkg.sv > $@
ls $(PWD)/$(@D)/*_if.sv > $@
ls $(PWD)/$(@D)/*amba*.sv >> $@
ls $(PWD)/$(@D)/*.sv | grep -v '.*_pkg.sv$$' | grep -v '.*amba.*' >> $@
ls $(PWD)/$(@D)/*.sv | grep -v '.*_if.sv$$' | grep -v '.*amba.*' >> $@
clean: