mvm: Add state management groundwork

Signed-off-by: Chloe M. <chloe@mirocom.org>

mvm/core/state_subr.c

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2026 Mirocom Laboratories and MSP engineers.
+ * All Rights Reserved.
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <errno.h>
+#include "mvm/state.h"
+#include "mvm/common.h"
+
+int
+mvm_state_init(struct mvm_state *state)
+{
+    if (state == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (bus_ctl_init(&state->busctl) < 0) {
+        errno = EIO;
+        return -1;
+    }
+
+    if (mvm_rom_init(&state->bootrom, MVM_BOOTROM_SIZE) < 0) {
+        errno = EIO;
+        return -1;
+    }
+
+    return 0;
+}
+
+void
+mvm_state_free(struct mvm_state *state)
+{
+    if (state == NULL) {
+        return;
+    }
+
+    bus_ctl_free(&state->busctl);
+    mvm_rom_free(&state->bootrom);
+}