From d1a5c075d59a21848882d40ccb309f2ca47fe815 Mon Sep 17 00:00:00 2001
From: Marno van der Maas <mvdmaas+git@lowrisc.org>
Date: Thu, 15 Aug 2024 15:35:19 +0100
Subject: [PATCH] Reading block instances from TOML specification

This commit also adds an initial specification of the blocks and the
pins including pydantic data schema in the top generator.

Co-authored-by: Hugo McNally <hugo.mcnally@gmail.com>
---
 data/top_config.toml    | 392 ++++++++++++++++++++++++++++++++++++++++
 flake.nix               |   1 +
 poetry.lock             | 357 ++++++++++++++++--------------------
 pyproject.toml          |   2 +
 python-requirements.txt |   1 +
 util/top_gen.py         |  90 +++++++--
 6 files changed, 628 insertions(+), 215 deletions(-)
 create mode 100644 data/top_config.toml

diff --git a/data/top_config.toml b/data/top_config.toml
new file mode 100644
index 000000000..2cb32f028
--- /dev/null
+++ b/data/top_config.toml
@@ -0,0 +1,392 @@
+[[blocks]]
+name = "uart"
+instances = 5
+ios = [
+  { name = "tx", type = "output" },
+  { name = "rx", type = "input", default = 1 },
+]
+
+[[blocks]]
+name = "i2c"
+instances = 2
+ios = [
+  { name = "scl", type = "inout", combine = "and" },
+  { name = "sda", type = "inout", combine = "and" },
+]
+
+[[blocks]]
+name = "spi"
+instances = 7
+ios = [
+  { name = "sck", type = "output" },
+  { name = "tx", type = "output" },
+  { name = "rx", type = "input", default = 0 },
+]
+
+[[blocks]]
+name = "gpio"
+instances = 5 # 2 RPi, 2 Ard, 1 Pmod
+
+[[blocks.ios]]
+name = "ios"
+type = "inout"
+combine = "mux"
+length = 16
+
+
+# UARTS
+[[pins]]
+name = "ser0_tx"
+block_ios = [{ block = "uart", instance = 0, io = "tx" }]
+
+[[pins]]
+name = "ser0_rx"
+block_ios = [{ block = "uart", instance = 0, io = "rx" }]
+
+[[pins]]
+name = "ser1_tx"
+block_ios = [{ block = "uart", instance = 1, io = "tx" }]
+
+[[pins]]
+name = "ser1_rx"
+block_ios = [{ block = "uart", instance = 1, io = "rx" }]
+
+[[pins]]
+name = "rs232_tx"
+block_ios = [{ block = "uart", instance = 4, io = "tx" }]
+
+[[pins]]
+name = "rs232_rx"
+block_ios = [{ block = "uart", instance = 4, io = "rx" }]
+
+## QWIIC (Sparkfun) buses
+[[pins]]
+name = "scl0"
+block_ios = [{ block = "i2c", instance = 0, io = "scl" }]
+
+[[pins]]
+name = "sda0"
+block_ios = [{ block = "i2c", instance = 0, io = "sda" }]
+
+[[pins]]
+name = "scl1"
+block_ios = [{ block = "i2c", instance = 1, io = "scl" }]
+
+[[pins]]
+name = "sda1"
+block_ios = [{ block = "i2c", instance = 1, io = "sda" }]
+
+## SPI Flash interface
+[[pins]]
+name = "appspi_d0"
+block_ios = [{ block = "spi", instance = 0, io = "tx" }]
+
+[[pins]]
+name = "appspi_d1"
+block_ios = [{ block = "spi", instance = 0, io = "rx" }]
+
+[[pins]]
+name = "appspi_clk"
+block_ios = [{ block = "spi", instance = 0, io = "sck" }]
+
+## SPI LCD
+[[pins]]
+name = "lcd_copi"
+block_ios = [{ block = "spi", instance = 1, io = "tx" }]
+
+## RX or CIPO is not connected
+
+[[pins]]
+name = "lcd_clk"
+block_ios = [{ block = "spi", instance = 1, io = "sck" }]
+
+## SPI Ethernet
+[[pins]]
+name = "ethmac_copi"
+block_ios = [{ block = "spi", instance = 2, io = "tx" }]
+
+[[pins]]
+name = "ethmac_cipo"
+block_ios = [{ block = "spi", instance = 2, io = "rx" }]
+
+[[pins]]
+name = "ethmac_sclk"
+block_ios = [{ block = "spi", instance = 2, io = "sck" }]
+
+## Raspberry Pi HAT
+[[pins]]
+name = "rph_g0"
+block_ios = [
+  { block = "i2c", instance = 0, io = "sda" },
+  { block = "gpio", instance = 0, io = 0 },
+]
+
+[[pins]]
+name = "rph_g1"
+block_ios = [
+  {block = "i2c", instance = 0, io = "scl"},
+  {block = "gpio", instance = 0, io = 1},
+]
+
+[[pins]]
+name = "rph_g2_sda"
+block_ios = [
+  {block = "i2c", instance = 1, io = "sda"},
+  {block = "gpio", instance = 0, io = 2},
+]
+
+[[pins]]
+name = "rph_g3_scl"
+block_ios = [
+  {block = "i2c", instance = 1, io = "scl"},
+  {block = "gpio", instance = 0, io = 3},
+]
+
+[[pins]]
+name = "rph_g4"
+block_ios = [{block = "gpio", instance = 0, io = 4}]
+
+[[pins]]
+name = "rph_g5"
+block_ios = [{block = "gpio", instance = 0, io = 5}]
+
+[[pins]]
+name = "rph_g6"
+block_ios = [{block = "gpio", instance = 0, io = 6}]
+
+[[pins]]
+name = "rph_g7_ce1"
+block_ios = [{block = "gpio", instance = 0, io = 7}]
+
+[[pins]]
+name = "rph_g8_ce0"
+block_ios = [{block = "gpio", instance = 0, io = 8}]
+
+[[pins]]
+name = "rph_g9_cipo"
+block_ios = [
+  {block = "spi", instance = 3, io = "rx"},
+  {block = "gpio", instance = 0, io = 9},
+]
+
+[[pins]]
+name = "rph_g10_copi"
+block_ios = [
+  {block = "spi", instance = 3, io = "tx"},
+  {block = "gpio", instance = 0, io = 10},
+]
+
+[[pins]]
+name = "rph_g11_sclk"
+block_ios = [
+  {block = "spi", instance = 3, io = "sck"},
+  {block = "gpio", instance = 0, io = 11},
+]
+
+[[pins]]
+name = "rph_g12"
+block_ios = [{block = "gpio", instance = 0, io = 12}]
+
+[[pins]]
+name = "rph_g13"
+block_ios = [{block = "gpio", instance = 0, io = 13}]
+
+[[pins]]
+name = "rph_txd0"
+block_ios = [
+  {block = "uart", instance = 2, io = "tx"},
+  {block = "gpio", instance = 0, io = 14},
+]
+
+[[pins]]
+name = "rph_rxd0"
+block_ios = [
+  {block = "uart", instance = 2, io = "rx"},
+  {block = "gpio", instance = 0, io = 15},
+]
+
+[[pins]]
+name = "rph_g16_ce2"
+block_ios = [{block = "gpio", instance = 1, io = 0}]
+
+[[pins]]
+name = "rph_g17"
+block_ios = [{block = "gpio", instance = 1, io = 1}]
+
+[[pins]]
+name = "rph_g18"
+block_ios = [{block = "gpio", instance = 1, io = 2}]
+
+[[pins]]
+name = "rph_g19_cipo"
+block_ios = [
+  {block = "spi", instance = 4, io = "rx"},
+  {block = "gpio", instance = 1, io = 3},
+]
+
+[[pins]]
+name = "rph_g20_copi"
+block_ios = [
+  {block = "spi", instance = 4, io = "tx"},
+  {block = "gpio", instance = 1, io = 4},
+]
+
+[[pins]]
+name = "rph_g21_sclk"
+block_ios = [
+  {block = "spi", instance = 4, io = "sck"},
+  {block = "gpio", instance = 1, io = 5},
+]
+
+[[pins]]
+name = "rph_g22"
+block_ios = [{block = "gpio", instance = 1, io = 6}]
+
+[[pins]]
+name = "rph_g23"
+block_ios = [{block = "gpio", instance = 1, io = 7}]
+
+[[pins]]
+name = "rph_g24"
+block_ios = [{block = "gpio", instance = 1, io = 8}]
+
+[[pins]]
+name = "rph_g25"
+block_ios = [{block = "gpio", instance = 1, io = 9}]
+
+[[pins]]
+name = "rph_g26"
+block_ios = [{block = "gpio", instance = 1, io = 10}]
+
+[[pins]]
+name = "rph_g27"
+block_ios = [{block = "gpio", instance = 1, io = 11}]
+
+## Arduino Shield
+[[pins]]
+name = "ah_tmpio0"
+block_ios = [{block = "gpio", instance = 2, io = 0}]
+
+[[pins]]
+name = "ah_tmpio1"
+block_ios = [{block = "gpio", instance = 2, io = 1}]
+
+[[pins]]
+name = "ah_tmpio2"
+block_ios = [{block = "gpio", instance = 2, io = 2}]
+
+[[pins]]
+name = "ah_tmpio3"
+block_ios = [{block = "gpio", instance = 2, io = 3}]
+
+[[pins]]
+name = "ah_tmpio4"
+block_ios = [{block = "gpio", instance = 2, io = 4}]
+
+[[pins]]
+name = "ah_tmpio5"
+block_ios = [{block = "gpio", instance = 2, io = 5}]
+
+[[pins]]
+name = "ah_tmpio6"
+block_ios = [{block = "gpio", instance = 2, io = 6}]
+
+[[pins]]
+name = "ah_tmpio7"
+block_ios = [{block = "gpio", instance = 2, io = 7}]
+
+[[pins]]
+name = "ah_tmpio8"
+block_ios = [{block = "gpio", instance = 2, io = 8}]
+
+[[pins]]
+name = "ah_tmpio9"
+block_ios = [{block = "gpio", instance = 2, io = 9}]
+
+[[pins]]
+# Arduino shield chip select
+name = "ah_tmpio10"
+block_ios = [{block = "gpio", instance = 2, io = 10}]
+
+[[pins]]
+name = "ah_tmpio11"
+block_ios = [
+  {block = "spi", instance = 5, io = "tx"},
+  {block = "gpio", instance = 2, io = 11},
+]
+
+[[pins]]
+name = "ah_tmpio12"
+block_ios = [
+  {block = "spi", instance = 5, io = "rx"},
+  {block = "gpio", instance = 2, io = 12},
+]
+
+[[pins]]
+name = "ah_tmpio13"
+block_ios = [
+  {block = "spi", instance = 5, io = "sck"},
+  {block = "gpio", instance = 2, io = 13},
+]
+
+[[pins]]
+name = "ah_tmpio14"
+block_ios = [{block = "gpio", instance = 2, io = 14}]
+
+[[pins]]
+name = "ah_tmpio15"
+block_ios = [{block = "gpio", instance = 2, io = 15}]
+
+[[pins]]
+# Arduino Shield reset
+name = "ah_tmpio16"
+block_ios = [{block = "gpio", instance = 3, io = 0}]
+
+[[pins]]
+name = "ah_tmpio17"
+block_ios = [{block = "gpio", instance = 3, io = 1}]
+# TODO connect up AH_AN0-5 to ADC
+
+# mikroBUS Click
+# mb0 is reset and already connected to a general purpose output.
+# mb1 is chip select and already connected to a general purpose output.
+[[pins]]
+name = "mb2"
+block_ios = [{block = "spi", instance = 6, io = "sck"}]
+
+[[pins]]
+name = "mb3"
+block_ios = [{block = "spi", instance = 6, io = "rx"}]
+
+[[pins]]
+name = "mb4"
+block_ios = [{block = "spi", instance = 6, io = "tx"}]
+
+[[pins]]
+name = "mb5"
+block_ios = [{block = "i2c", instance = 1, io = "sda"}]
+
+[[pins]]
+name = "mb6"
+block_ios = [{block = "i2c", instance = 1, io = "scl"}]
+
+[[pins]]
+name = "mb7"
+block_ios = [{block = "uart", instance = 3, io = "tx"}]
+
+[[pins]]
+name = "mb8"
+block_ios = [{block = "uart", instance = 3, io = "rx"}]
+# mb9 is interrupt and already connected to a general purpose input.
+# mb10 is PWM and is already connected to a PWM output.
+
+## PMODs
+[[pins]]
+name = "pmod0"
+length = 8
+block_ios = [{block = "gpio", instance = 4, io = 0}]
+
+[[pins]]
+name = "pmod1"
+length = 8
+block_ios = [{block = "gpio", instance = 4, io = 8}]
diff --git a/flake.nix b/flake.nix
index 6cd4785c5..653bf14f6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,6 +40,7 @@
       in
         poetry2nix.mkPoetryEnv {
           projectDir = ./.;
+          python = pkgs.python310;
           overrides = [
             poetryOverrides
             poetry2nix.defaultPoetryOverrides
diff --git a/poetry.lock b/poetry.lock
index 1833e33a8..a2c4dc627 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,5 +1,16 @@
 # This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
 
+[[package]]
+name = "annotated-types"
+version = "0.7.0"
+description = "Reusable constraint types to use with typing.Annotated"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "annotated_types-0.7.0-py3-none-any.whl", hash = "sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53"},
+    {file = "annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"},
+]
+
 [[package]]
 name = "anytree"
 version = "2.8.0"
@@ -37,17 +48,6 @@ docs = ["cogapp", "furo", "myst-parser", "sphinx", "sphinx-notfound-page", "sphi
 tests = ["cloudpickle", "hypothesis", "mypy (>=1.11.1)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "pytest-xdist[psutil]"]
 tests-mypy = ["mypy (>=1.11.1)", "pytest-mypy-plugins"]
 
-[[package]]
-name = "distro"
-version = "1.9.0"
-description = "Distro - an OS platform information API"
-optional = false
-python-versions = ">=3.6"
-files = [
-    {file = "distro-1.9.0-py3-none-any.whl", hash = "sha256:7bffd925d65168f85027d8da9af6bddab658135b840670a223589bc0c8ef02b2"},
-    {file = "distro-1.9.0.tar.gz", hash = "sha256:2fa77c6fd8940f116ee1d6b94a2f90b13b5ea8d019b98bc8bafdcabcdd9bdbed"},
-]
-
 [[package]]
 name = "edalize"
 version = "0.4.0"
@@ -118,41 +118,6 @@ MarkupSafe = ">=2.0"
 [package.extras]
 i18n = ["Babel (>=2.7)"]
 
-[[package]]
-name = "jsonschema"
-version = "4.23.0"
-description = "An implementation of JSON Schema validation for Python"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "jsonschema-4.23.0-py3-none-any.whl", hash = "sha256:fbadb6f8b144a8f8cf9f0b89ba94501d143e50411a1278633f56a7acf7fd5566"},
-    {file = "jsonschema-4.23.0.tar.gz", hash = "sha256:d71497fef26351a33265337fa77ffeb82423f3ea21283cd9467bb03999266bc4"},
-]
-
-[package.dependencies]
-attrs = ">=22.2.0"
-jsonschema-specifications = ">=2023.03.6"
-referencing = ">=0.28.4"
-rpds-py = ">=0.7.1"
-
-[package.extras]
-format = ["fqdn", "idna", "isoduration", "jsonpointer (>1.13)", "rfc3339-validator", "rfc3987", "uri-template", "webcolors (>=1.11)"]
-format-nongpl = ["fqdn", "idna", "isoduration", "jsonpointer (>1.13)", "rfc3339-validator", "rfc3986-validator (>0.1.0)", "uri-template", "webcolors (>=24.6.0)"]
-
-[[package]]
-name = "jsonschema-specifications"
-version = "2023.12.1"
-description = "The JSON Schema meta-schemas and vocabularies, exposed as a Registry"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "jsonschema_specifications-2023.12.1-py3-none-any.whl", hash = "sha256:87e4fdf3a94858b8a2ba2778d9ba57d8a9cafca7c7489c46ba0d30a8bc6a9c3c"},
-    {file = "jsonschema_specifications-2023.12.1.tar.gz", hash = "sha256:48a76787b3e70f5ed53f1160d2b81f586e4ca6d1548c5de7085d1682674764cc"},
-]
-
-[package.dependencies]
-referencing = ">=0.31.0"
-
 [[package]]
 name = "mako"
 version = "1.1.6"
@@ -300,24 +265,20 @@ files = [
 
 [[package]]
 name = "okonomiyaki"
-version = "1.4.0"
+version = "2.0.0"
 description = "Self-contained library to deal with metadata in Enthought-specific egg and runtime archives"
 optional = false
-python-versions = ">=2.7"
+python-versions = ">=3.6"
 files = [
-    {file = "okonomiyaki-1.4.0-py2.py3-none-any.whl", hash = "sha256:174af185f866fc42fdb58b2d6c7107d870f795e3f404b9c6278f8e62f87f0f83"},
-    {file = "okonomiyaki-1.4.0.tar.gz", hash = "sha256:508008004a12e09f565d8b4e4145bd7500787fdd6810d898fdc8e5c61a3f41e5"},
+    {file = "okonomiyaki-2.0.0-py2.py3-none-any.whl", hash = "sha256:9d2b63cb5cbb3288a37c078b4ccda6adc1d6ac2d1c8990572b3de4f767ad72eb"},
+    {file = "okonomiyaki-2.0.0.tar.gz", hash = "sha256:8aacccce9266629b7dd5d8f2ec01a4effa2b4d676517349f7933f9742f6f0c4a"},
 ]
 
-[package.dependencies]
-attrs = ">=16.1.0"
-distro = {version = "*", markers = "sys_platform == \"linux\" or sys_platform == \"linux2\""}
-jsonschema = ">=2.5.1"
-six = ">=1.9.0"
-zipfile2 = ">=0.0.12"
-
 [package.extras]
-test = ["distro", "haas", "hypothesis", "mock", "packaging (>=20.0)", "testfixtures"]
+all = ["attrs (>=16.1.0)", "distro", "distro", "jsonschema (>=2.5.1)", "zipfile2 (>=0.0.12)"]
+formats = ["attrs (>=16.1.0)", "distro", "distro", "jsonschema (>=2.5.1)", "zipfile2 (>=0.0.12)"]
+platforms = ["attrs (>=16.1.0)", "distro", "distro"]
+test = ["distro", "haas", "packaging (>=20.0)", "parameterized", "testfixtures"]
 
 [[package]]
 name = "packaging"
@@ -330,15 +291,138 @@ files = [
     {file = "packaging-23.1.tar.gz", hash = "sha256:a392980d2b6cffa644431898be54b0045151319d1e7ec34f0cfed48767dd334f"},
 ]
 
+[[package]]
+name = "pydantic"
+version = "2.8.2"
+description = "Data validation using Python type hints"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pydantic-2.8.2-py3-none-any.whl", hash = "sha256:73ee9fddd406dc318b885c7a2eab8a6472b68b8fb5ba8150949fc3db939f23c8"},
+    {file = "pydantic-2.8.2.tar.gz", hash = "sha256:6f62c13d067b0755ad1c21a34bdd06c0c12625a22b0fc09c6b149816604f7c2a"},
+]
+
+[package.dependencies]
+annotated-types = ">=0.4.0"
+pydantic-core = "2.20.1"
+typing-extensions = [
+    {version = ">=4.12.2", markers = "python_version >= \"3.13\""},
+    {version = ">=4.6.1", markers = "python_version < \"3.13\""},
+]
+
+[package.extras]
+email = ["email-validator (>=2.0.0)"]
+
+[[package]]
+name = "pydantic-core"
+version = "2.20.1"
+description = "Core functionality for Pydantic validation and serialization"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pydantic_core-2.20.1-cp310-cp310-macosx_10_12_x86_64.whl", hash = "sha256:3acae97ffd19bf091c72df4d726d552c473f3576409b2a7ca36b2f535ffff4a3"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:41f4c96227a67a013e7de5ff8f20fb496ce573893b7f4f2707d065907bffdbd6"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:5f239eb799a2081495ea659d8d4a43a8f42cd1fe9ff2e7e436295c38a10c286a"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:53e431da3fc53360db73eedf6f7124d1076e1b4ee4276b36fb25514544ceb4a3"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:f1f62b2413c3a0e846c3b838b2ecd6c7a19ec6793b2a522745b0869e37ab5bc1"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:5d41e6daee2813ecceea8eda38062d69e280b39df793f5a942fa515b8ed67953"},
+    {file = "pydantic_core-2.20.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:3d482efec8b7dc6bfaedc0f166b2ce349df0011f5d2f1f25537ced4cfc34fd98"},
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-    {file = "rpds_py-0.20.0.tar.gz", hash = "sha256:d72a210824facfdaf8768cf2d7ca25a042c30320b3020de2fa04640920d4e121"},
-]
-
 [[package]]
 name = "ruff"
 version = "0.5.7"
@@ -588,6 +545,17 @@ files = [
     {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
 ]
 
+[[package]]
+name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+files = [
+    {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
+    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+]
+
 [[package]]
 name = "tomli"
 version = "2.0.1"
@@ -624,18 +592,7 @@ files = [
 [package.extras]
 test = ["pytest (>=6.0.0)", "setuptools (>=65)"]
 
-[[package]]
-name = "zipfile2"
-version = "0.0.12"
-description = "An improved ZipFile class."
-optional = false
-python-versions = "*"
-files = [
-    {file = "zipfile2-0.0.12-py2.py3-none-any.whl", hash = "sha256:b9adf577d825461480e485027116c035f666b72ac3911af71aa93da6e0579eb8"},
-    {file = "zipfile2-0.0.12.tar.gz", hash = "sha256:7376f7c968717ac895ef862da913e790cf1b518caf56c4822c04684c46a8a608"},
-]
-
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "c46792a2334cbb78b0bf915afe3193ab28e07aa0e951c71760c00cfa82714776"
+content-hash = "66aa78949bf58a721549fb60dee1f4edb6653d9a00999363bf229d528b88adf1"
diff --git a/pyproject.toml b/pyproject.toml
index 03615772a..b3fe2dfa5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,8 @@ mypy = "1.11.1"
 ruff = "0.5.7"
 edalize = { git = "https://github.com/lowRISC/edalize.git", tag = "v0.4.0"}
 fusesoc = { git = "https://github.com/lowRISC/fusesoc.git", tag = "ot-0.4" }
+pydantic = "^2.8.2"
+toml = "0.10.2"
 
 [build-system]
 requires = ["poetry-core"]
diff --git a/python-requirements.txt b/python-requirements.txt
index 00832c7e5..71da993e3 100644
--- a/python-requirements.txt
+++ b/python-requirements.txt
@@ -9,6 +9,7 @@ hjson
 mako
 pyyaml
 wheel
+toml
 
 # Development version of edalize until all our changes are upstream
 git+https://github.com/lowRISC/edalize.git@ot
diff --git a/util/top_gen.py b/util/top_gen.py
index f1cf133af..bb69bc41d 100755
--- a/util/top_gen.py
+++ b/util/top_gen.py
@@ -1,24 +1,84 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python3.10
 # Copyright lowRISC contributors
 # Licensed under the Apache License, Version 2.0, see LICENSE for details.
 # SPDX-License-Identifier: Apache-2.0
 
+import toml
+from pydantic import BaseModel
+from enum import Enum
 from mako.template import Template
 
-gpio_num = 5
-uart_num = 5
-i2c_num  = 2
-spi_num  = 7
 
-xbar_spec = ('data/xbar_main.hjson', 'data/xbar_main_generated.hjson')
-sonata_xbar_spec = ('rtl/templates/sonata_xbar_main.sv.tpl', 'rtl/bus/sonata_xbar_main.sv')
-pkg_spec = ('rtl/templates/sonata_pkg.sv.tpl',       'rtl/system/sonata_pkg.sv')
+class BlockIoType(str, Enum):
+    IN_OUT = "inout"
+    INPUT = "input"
+    OUTPUT = "output"
 
-specs = [xbar_spec, sonata_xbar_spec, pkg_spec]
 
-for spec in specs:
-    print('Generating from template: ' + spec[0])
-    template = Template(filename=spec[0])
-    content = template.render(gpio_num=gpio_num, uart_num=uart_num, i2c_num=i2c_num, spi_num=spi_num)
-    with open(spec[1], 'w') as file:
-        file.write(content)
+class BlockIo(BaseModel):
+    name: str
+    type: BlockIoType
+    combine: str | None = None
+    default: int | None = None
+
+
+class Block(BaseModel):
+    name: str
+    instances: int
+    ios: list[BlockIo]
+
+
+class PinIo(BaseModel):
+    block: str
+    instance: int
+    io: str | int
+
+
+class Pin(BaseModel):
+    name: str
+    length: int | None = None
+    block_ios: list[PinIo]
+
+
+class Config(BaseModel):
+    blocks: list[Block]
+    pins: list[Pin]
+
+
+if __name__ == "__main__":
+    with open("data/top_config.toml", "r") as file:
+        config = Config(**toml.load(file))
+
+    def get_block(name: str) -> Block:
+        return next(block for block in config.blocks if block.name == name)
+
+    try:
+        gpio = get_block("gpio")
+        uart = get_block("uart")
+        i2c = get_block("i2c")
+        spi = get_block("spi")
+    except StopIteration:
+        print("One or more blocks not present in configuration.")
+        exit(3)
+
+    # Then we use those parameters to generate our SystemVerilog using Mako
+    xbar_spec = ("data/xbar_main.hjson", "data/xbar_main_generated.hjson")
+    sonata_xbar_spec = (
+        "rtl/templates/sonata_xbar_main.sv.tpl",
+        "rtl/bus/sonata_xbar_main.sv",
+    )
+    pkg_spec = ("rtl/templates/sonata_pkg.sv.tpl", "rtl/system/sonata_pkg.sv")
+
+    specs = [xbar_spec, sonata_xbar_spec, pkg_spec]
+
+    for template_file, output_file in specs:
+        print("Generating from template: " + template_file)
+        template = Template(filename=template_file)
+        content = template.render(
+            gpio_num=gpio.instances,
+            uart_num=uart.instances,
+            i2c_num=i2c.instances,
+            spi_num=spi.instances,
+        )
+        with open(output_file, "w") as file:
+            file.write(content)