| # Copyright lowRISC contributors. |
| # Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| # SPDX-License-Identifier: Apache-2.0 |
| """This contains a class which is used to help generate `top_{name}.h` and |
| `top_{name}.h`. |
| """ |
| from collections import OrderedDict, defaultdict |
| from typing import Dict, List, Optional, Tuple |
| |
| from mako.template import Template |
| from reggen.ip_block import IpBlock |
| |
| from .lib import Name, get_base_and_size |
| |
| C_FILE_EXTENSIONS = (".c", ".h", ".cc", ".inc") |
| |
| |
| class MemoryRegion(object): |
| def __init__(self, name: Name, base_addr: int, size_bytes: int): |
| assert isinstance(base_addr, int) |
| self.name = name |
| self.base_addr = base_addr |
| self.size_bytes = size_bytes |
| self.size_words = (size_bytes + 3) // 4 |
| |
| def base_addr_name(self): |
| return self.name + Name(["base", "addr"]) |
| |
| def offset_name(self): |
| return self.name + Name(["offset"]) |
| |
| def size_bytes_name(self): |
| return self.name + Name(["size", "bytes"]) |
| |
| def size_words_name(self): |
| return self.name + Name(["size", "words"]) |
| |
| |
| class CEnum(object): |
| def __init__(self, name): |
| self.name = name |
| self.enum_counter = 0 |
| self.finalized = False |
| |
| self.constants = [] |
| |
| def add_constant(self, constant_name, docstring=""): |
| assert not self.finalized |
| |
| full_name = self.name + constant_name |
| |
| value = self.enum_counter |
| self.enum_counter += 1 |
| |
| self.constants.append((full_name, value, docstring)) |
| |
| return full_name |
| |
| def add_last_constant(self, docstring=""): |
| assert not self.finalized |
| |
| full_name = self.name + Name(["last"]) |
| |
| _, last_val, _ = self.constants[-1] |
| |
| self.constants.append((full_name, last_val, r"\internal " + docstring)) |
| self.finalized = True |
| |
| def render(self): |
| template = ("typedef enum ${enum.name.as_snake_case()} {\n" |
| "% for name, value, docstring in enum.constants:\n" |
| " ${name.as_c_enum()} = ${value}, /**< ${docstring} */\n" |
| "% endfor\n" |
| "} ${enum.name.as_c_type()};") |
| return Template(template).render(enum=self) |
| |
| |
| class CArrayMapping(object): |
| def __init__(self, name, output_type_name): |
| self.name = name |
| self.output_type_name = output_type_name |
| |
| self.mapping = OrderedDict() |
| |
| def add_entry(self, in_name, out_name): |
| self.mapping[in_name] = out_name |
| |
| def render_declaration(self): |
| template = ( |
| "extern const ${mapping.output_type_name.as_c_type()}\n" |
| " ${mapping.name.as_snake_case()}[${len(mapping.mapping)}];") |
| return Template(template).render(mapping=self) |
| |
| def render_definition(self): |
| template = ( |
| "const ${mapping.output_type_name.as_c_type()}\n" |
| " ${mapping.name.as_snake_case()}[${len(mapping.mapping)}] = {\n" |
| "% for in_name, out_name in mapping.mapping.items():\n" |
| " [${in_name.as_c_enum()}] = ${out_name.as_c_enum()},\n" |
| "% endfor\n" |
| "};\n") |
| return Template(template).render(mapping=self) |
| |
| |
| class TopGenC: |
| def __init__(self, top_info, name_to_block: Dict[str, IpBlock]): |
| self.top = top_info |
| self._top_name = Name(["top"]) + Name.from_snake_case(top_info["name"]) |
| self._name_to_block = name_to_block |
| |
| # The .c file needs the .h file's relative path, store it here |
| self.header_path = None |
| |
| self._init_plic_targets() |
| self._init_plic_mapping() |
| self._init_alert_mapping() |
| self._init_pinmux_mapping() |
| self._init_pad_mapping() |
| self._init_pwrmgr_wakeups() |
| self._init_rstmgr_sw_rsts() |
| self._init_pwrmgr_reset_requests() |
| self._init_clkmgr_clocks() |
| self._init_mmio_region() |
| |
| def devices(self) -> List[Tuple[Tuple[str, Optional[str]], MemoryRegion]]: |
| '''Return a list of MemoryRegion objects for devices on the bus |
| |
| The list returned is pairs (full_if, region) where full_if is itself a |
| pair (inst_name, if_name). inst_name is the name of some IP block |
| instantiation. if_name is the name of the interface (may be None). |
| region is a MemoryRegion object representing the device. |
| |
| ''' |
| ret = [] # type: List[Tuple[Tuple[str, Optional[str]], MemoryRegion]] |
| # TODO: This method is invoked in templates, as well as in the extended |
| # class TopGenCTest. We could refactor and optimize the implementation |
| # a bit. |
| self.device_regions = defaultdict(dict) |
| for inst in self.top['module']: |
| block = self._name_to_block[inst['type']] |
| for if_name, rb in block.reg_blocks.items(): |
| full_if = (inst['name'], if_name) |
| full_if_name = Name.from_snake_case(full_if[0]) |
| if if_name is not None: |
| full_if_name += Name.from_snake_case(if_name) |
| |
| name = self._top_name + full_if_name |
| base, size = get_base_and_size(self._name_to_block, |
| inst, if_name) |
| |
| region = MemoryRegion(name, base, size) |
| self.device_regions[inst['name']].update({if_name: region}) |
| ret.append((full_if, region)) |
| |
| return ret |
| |
| def memories(self): |
| ret = [] |
| for m in self.top["memory"]: |
| ret.append((m["name"], |
| MemoryRegion(self._top_name + |
| Name.from_snake_case(m["name"]), |
| int(m["base_addr"], 0), |
| int(m["size"], 0)))) |
| |
| for inst in self.top['module']: |
| if "memory" in inst: |
| for if_name, val in inst["memory"].items(): |
| base, size = get_base_and_size(self._name_to_block, |
| inst, if_name) |
| |
| name = self._top_name + Name.from_snake_case(val["label"]) |
| region = MemoryRegion(name, base, size) |
| ret.append((val["label"], region)) |
| |
| return ret |
| |
| def _init_plic_targets(self): |
| enum = CEnum(self._top_name + Name(["plic", "target"])) |
| |
| for core_id in range(int(self.top["num_cores"])): |
| enum.add_constant(Name(["ibex", str(core_id)]), |
| docstring="Ibex Core {}".format(core_id)) |
| |
| enum.add_last_constant("Final PLIC target") |
| |
| self.plic_targets = enum |
| |
| def _init_plic_mapping(self): |
| """We eventually want to generate a mapping from interrupt id to the |
| source peripheral. |
| |
| In order to do so, we generate two enums (one for interrupts, one for |
| sources), and store the generated names in a dictionary that represents |
| the mapping. |
| |
| PLIC Interrupt ID 0 corresponds to no interrupt, and so no peripheral, |
| so we encode that in the enum as "unknown". |
| |
| The interrupts have to be added in order, with "none" first, to ensure |
| that they get the correct mapping to their PLIC id, which is used for |
| addressing the right registers and bits. |
| """ |
| sources = CEnum(self._top_name + Name(["plic", "peripheral"])) |
| interrupts = CEnum(self._top_name + Name(["plic", "irq", "id"])) |
| plic_mapping = CArrayMapping( |
| self._top_name + Name(["plic", "interrupt", "for", "peripheral"]), |
| sources.name) |
| |
| unknown_source = sources.add_constant(Name(["unknown"]), |
| docstring="Unknown Peripheral") |
| none_irq_id = interrupts.add_constant(Name(["none"]), |
| docstring="No Interrupt") |
| plic_mapping.add_entry(none_irq_id, unknown_source) |
| |
| # When we generate the `interrupts` enum, the only info we have about |
| # the source is the module name. We'll use `source_name_map` to map a |
| # short module name to the full name object used for the enum constant. |
| source_name_map = {} |
| |
| for name in self.top["interrupt_module"]: |
| source_name = sources.add_constant(Name.from_snake_case(name), |
| docstring=name) |
| source_name_map[name] = source_name |
| |
| sources.add_last_constant("Final PLIC peripheral") |
| |
| # Maintain a list of instance-specific IRQs by instance name. |
| self.device_irqs = defaultdict(list) |
| for intr in self.top["interrupt"]: |
| # Some interrupts are multiple bits wide. Here we deal with that by |
| # adding a bit-index suffix |
| if "width" in intr and int(intr["width"]) != 1: |
| for i in range(int(intr["width"])): |
| name = Name.from_snake_case(intr["name"]) + Name([str(i)]) |
| irq_id = interrupts.add_constant(name, |
| docstring="{} {}".format( |
| intr["name"], i)) |
| source_name = source_name_map[intr["module_name"]] |
| plic_mapping.add_entry(irq_id, source_name) |
| self.device_irqs[intr["module_name"]].append(intr["name"] + |
| str(i)) |
| else: |
| name = Name.from_snake_case(intr["name"]) |
| irq_id = interrupts.add_constant(name, docstring=intr["name"]) |
| source_name = source_name_map[intr["module_name"]] |
| plic_mapping.add_entry(irq_id, source_name) |
| self.device_irqs[intr["module_name"]].append(intr["name"]) |
| |
| interrupts.add_last_constant("The Last Valid Interrupt ID.") |
| |
| self.plic_sources = sources |
| self.plic_interrupts = interrupts |
| self.plic_mapping = plic_mapping |
| |
| def _init_alert_mapping(self): |
| """We eventually want to generate a mapping from alert id to the source |
| peripheral. |
| |
| In order to do so, we generate two enums (one for alerts, one for |
| sources), and store the generated names in a dictionary that represents |
| the mapping. |
| |
| Alert Handler has no concept of "no alert", unlike the PLIC. |
| |
| The alerts have to be added in order, to ensure that they get the |
| correct mapping to their alert id, which is used for addressing the |
| right registers and bits. |
| """ |
| sources = CEnum(self._top_name + Name(["alert", "peripheral"])) |
| alerts = CEnum(self._top_name + Name(["alert", "id"])) |
| alert_mapping = CArrayMapping( |
| self._top_name + Name(["alert", "for", "peripheral"]), |
| sources.name) |
| |
| # When we generate the `alerts` enum, the only info we have about the |
| # source is the module name. We'll use `source_name_map` to map a short |
| # module name to the full name object used for the enum constant. |
| source_name_map = {} |
| |
| for name in self.top["alert_module"]: |
| source_name = sources.add_constant(Name.from_snake_case(name), |
| docstring=name) |
| source_name_map[name] = source_name |
| |
| sources.add_last_constant("Final Alert peripheral") |
| |
| self.device_alerts = defaultdict(list) |
| for alert in self.top["alert"]: |
| if "width" in alert and int(alert["width"]) != 1: |
| for i in range(int(alert["width"])): |
| name = Name.from_snake_case(alert["name"]) + Name([str(i)]) |
| irq_id = alerts.add_constant(name, |
| docstring="{} {}".format( |
| alert["name"], i)) |
| source_name = source_name_map[alert["module_name"]] |
| alert_mapping.add_entry(irq_id, source_name) |
| self.device_alerts[alert["module_name"]].append(alert["name"] + |
| str(i)) |
| else: |
| name = Name.from_snake_case(alert["name"]) |
| alert_id = alerts.add_constant(name, docstring=alert["name"]) |
| source_name = source_name_map[alert["module_name"]] |
| alert_mapping.add_entry(alert_id, source_name) |
| self.device_alerts[alert["module_name"]].append(alert["name"]) |
| |
| alerts.add_last_constant("The Last Valid Alert ID.") |
| |
| self.alert_sources = sources |
| self.alert_alerts = alerts |
| self.alert_mapping = alert_mapping |
| |
| def _init_pinmux_mapping(self): |
| """Generate C enums for addressing pinmux registers and in/out selects. |
| |
| Inputs/outputs are connected in the order the modules are listed in |
| the hjson under the "mio_modules" key. For each module, the corresponding |
| inouts are connected first, followed by either the inputs or the outputs. |
| |
| Inputs: |
| - Peripheral chooses register field (pinmux_peripheral_in) |
| - Insel chooses MIO input (pinmux_insel) |
| |
| Outputs: |
| - MIO chooses register field (pinmux_mio_out) |
| - Outsel chooses peripheral output (pinmux_outsel) |
| |
| Insel and outsel have some special values which are captured here too. |
| """ |
| pinmux_info = self.top['pinmux'] |
| pinout_info = self.top['pinout'] |
| |
| # Peripheral Inputs |
| peripheral_in = CEnum(self._top_name + |
| Name(['pinmux', 'peripheral', 'in'])) |
| i = 0 |
| for sig in pinmux_info['ios']: |
| if sig['connection'] == 'muxed' and sig['type'] in ['inout', 'input']: |
| index = Name([str(sig['idx'])]) if sig['idx'] != -1 else Name([]) |
| name = Name.from_snake_case(sig['name']) + index |
| peripheral_in.add_constant(name, docstring='Peripheral Input {}'.format(i)) |
| i += 1 |
| |
| peripheral_in.add_last_constant('Last valid peripheral input') |
| |
| # Pinmux Input Selects |
| insel = CEnum(self._top_name + Name(['pinmux', 'insel'])) |
| insel.add_constant(Name(['constant', 'zero']), |
| docstring='Tie constantly to zero') |
| insel.add_constant(Name(['constant', 'one']), |
| docstring='Tie constantly to one') |
| i = 0 |
| for pad in pinout_info['pads']: |
| if pad['connection'] == 'muxed': |
| insel.add_constant(Name([pad['name']]), |
| docstring='MIO Pad {}'.format(i)) |
| i += 1 |
| insel.add_last_constant('Last valid insel value') |
| |
| # MIO Outputs |
| mio_out = CEnum(self._top_name + Name(['pinmux', 'mio', 'out'])) |
| i = 0 |
| for pad in pinout_info['pads']: |
| if pad['connection'] == 'muxed': |
| mio_out.add_constant(Name.from_snake_case(pad['name']), |
| docstring='MIO Pad {}'.format(i)) |
| i += 1 |
| mio_out.add_last_constant('Last valid mio output') |
| |
| # Pinmux Output Selects |
| outsel = CEnum(self._top_name + Name(['pinmux', 'outsel'])) |
| outsel.add_constant(Name(['constant', 'zero']), |
| docstring='Tie constantly to zero') |
| outsel.add_constant(Name(['constant', 'one']), |
| docstring='Tie constantly to one') |
| outsel.add_constant(Name(['constant', 'high', 'z']), |
| docstring='Tie constantly to high-Z') |
| i = 0 |
| for sig in pinmux_info['ios']: |
| if sig['connection'] == 'muxed' and sig['type'] in ['inout', 'output']: |
| index = Name([str(sig['idx'])]) if sig['idx'] != -1 else Name([]) |
| name = Name.from_snake_case(sig['name']) + index |
| outsel.add_constant(name, docstring='Peripheral Output {}'.format(i)) |
| i += 1 |
| |
| outsel.add_last_constant('Last valid outsel value') |
| |
| self.pinmux_peripheral_in = peripheral_in |
| self.pinmux_insel = insel |
| self.pinmux_mio_out = mio_out |
| self.pinmux_outsel = outsel |
| |
| def _init_pad_mapping(self): |
| """Generate C enums for order of MIO and DIO pads. |
| |
| These are needed to configure pad specific configurations such as |
| slew rate and other flags. |
| """ |
| direct_enum = CEnum(self._top_name + |
| Name(["direct", "pads"])) |
| |
| muxed_enum = CEnum(self._top_name + |
| Name(["muxed", "pads"])) |
| |
| pads_info = self.top['pinout']['pads'] |
| muxed = [pad['name'] for pad in pads_info if pad['connection'] == 'muxed'] |
| |
| # The logic here follows the sequence done in toplevel_pkg.sv.tpl. |
| # The direct pads do not enumerate directly from the pinout like the muxed |
| # ios. Instead it follows a direction from the pinmux perspective. |
| pads_info = self.top['pinmux']['ios'] |
| direct = [pad for pad in pads_info if pad['connection'] != 'muxed'] |
| |
| for pad in (direct): |
| name = f"{pad['name']}" |
| if pad['width'] > 1: |
| name = f"{name}{pad['idx']}" |
| |
| direct_enum.add_constant( |
| Name.from_snake_case(name)) |
| direct_enum.add_last_constant("Last valid direct pad") |
| |
| for pad in (muxed): |
| muxed_enum.add_constant( |
| Name.from_snake_case(pad)) |
| muxed_enum.add_last_constant("Last valid muxed pad") |
| |
| self.direct_pads = direct_enum |
| self.muxed_pads = muxed_enum |
| |
| def _init_pwrmgr_wakeups(self): |
| enum = CEnum(self._top_name + |
| Name(["power", "manager", "wake", "ups"])) |
| |
| for signal in self.top["wakeups"]: |
| enum.add_constant( |
| Name.from_snake_case(signal["module"]) + |
| Name.from_snake_case(signal["name"])) |
| |
| enum.add_last_constant("Last valid pwrmgr wakeup signal") |
| |
| self.pwrmgr_wakeups = enum |
| |
| # Enumerates the positions of all software controllable resets |
| def _init_rstmgr_sw_rsts(self): |
| sw_rsts = self.top['resets'].get_sw_resets() |
| |
| enum = CEnum(self._top_name + |
| Name(["reset", "manager", "sw", "resets"])) |
| |
| for rst in sw_rsts: |
| enum.add_constant(Name.from_snake_case(rst)) |
| |
| enum.add_last_constant("Last valid rstmgr software reset request") |
| |
| self.rstmgr_sw_rsts = enum |
| |
| def _init_pwrmgr_reset_requests(self): |
| enum = CEnum(self._top_name + |
| Name(["power", "manager", "reset", "requests"])) |
| |
| for signal in self.top["reset_requests"]["peripheral"]: |
| enum.add_constant( |
| Name.from_snake_case(signal["module"]) + |
| Name.from_snake_case(signal["name"])) |
| |
| enum.add_last_constant("Last valid pwrmgr reset_request signal") |
| |
| self.pwrmgr_reset_requests = enum |
| |
| def _init_clkmgr_clocks(self): |
| """ |
| Creates CEnums for accessing the software-controlled clocks in the |
| design. |
| |
| The logic here matches the logic in topgen.py in how it instantiates the |
| clock manager with the described clocks. |
| |
| We differentiate "gateable" clocks and "hintable" clocks because the |
| clock manager has separate register interfaces for each group. |
| """ |
| clocks = self.top['clocks'] |
| |
| gateable_clocks = CEnum(self._top_name + Name(["gateable", "clocks"])) |
| hintable_clocks = CEnum(self._top_name + Name(["hintable", "clocks"])) |
| |
| c2g = clocks.make_clock_to_group() |
| by_type = clocks.typed_clocks() |
| |
| for name in by_type.sw_clks.keys(): |
| # All these clocks start with `clk_` which is redundant. |
| clock_name = Name.from_snake_case(name).remove_part("clk") |
| docstring = "Clock {} in group {}".format(name, c2g[name].name) |
| gateable_clocks.add_constant(clock_name, docstring) |
| gateable_clocks.add_last_constant("Last Valid Gateable Clock") |
| |
| for name in by_type.hint_clks.keys(): |
| # All these clocks start with `clk_` which is redundant. |
| clock_name = Name.from_snake_case(name).remove_part("clk") |
| docstring = "Clock {} in group {}".format(name, c2g[name].name) |
| hintable_clocks.add_constant(clock_name, docstring) |
| hintable_clocks.add_last_constant("Last Valid Hintable Clock") |
| |
| self.clkmgr_gateable_clocks = gateable_clocks |
| self.clkmgr_hintable_clocks = hintable_clocks |
| |
| def _init_mmio_region(self): |
| """ |
| Computes the bounds of the MMIO region. |
| |
| MMIO region excludes any memory that is separate from the module configuration |
| space, i.e. ROM, main SRAM, and flash are excluded but retention SRAM, |
| spi_device memory, or usbdev memory are included. |
| """ |
| memories = [region.base_addr for (_, region) in self.memories()] |
| # TODO(#14345): Remove the hardcoded "rv_dm" name check below. |
| regions = [ |
| region for ((dev_name, _), region) in self.devices() |
| if region.base_addr not in memories and dev_name != "rv_dm" |
| ] |
| # Note: The memory interface of the retention RAM is in the MMIO address space, |
| # which we prefer since it reduces the number of ePMP regions we need. |
| mmio = range(min([r.base_addr for r in regions]), |
| max([r.base_addr + r.size_bytes for r in regions])) |
| self.mmio = MemoryRegion(self._top_name + Name(["mmio"]), mmio.start, |
| mmio.stop - mmio.start) |
