flatbuffer base

flatbuffers/config/device.fbs

@@ -0,0 +1,39 @@
+include "mem_config.fbs";
+include "clock.fbs";
+
+namespace hmmmm.config;
+
+// Configuration for a single base device (leaf node in the device tree).
+// Equivalent to a standalone device TOML (e.g. AVRrc.toml, gpio.toml).
+table BaseDeviceConfig {
+    libpath:      string;
+    mem_segments: [MemSegment];
+}
+
+// Override for one memory segment within a child device.
+// Only fields that need changing from the base config must be set.
+table MemSegOverride {
+    segment:    string;
+    start:      uint32;
+    len:        uint32;
+    word_len:   uint8;
+    executable: bool;
+}
+
+// One device entry in a composite configuration.
+table DeviceEntry {
+    // Local identifier, unique within this composite (e.g. "core", "gpio_a").
+    id: string;
+
+    // Exactly one of config or config_path must be set.
+    // config:      inline base device configuration.
+    // config_path: path to a serialised BaseDeviceConfig FlatBuffer file.
+    config:      BaseDeviceConfig;
+    config_path: string;
+
+    clock:     DeviceClockConfig;
+    overrides: [MemSegOverride];
+}
+
+// Root type when serialising a standalone device config to a binary file.
+root_type BaseDeviceConfig;