1 files changed, 31 insertions, 1 deletions
diff --git a/sys/include/dev.h b/sys/include/dev.h
index b8bfef8..657c04c 100644
--- a/sys/include/dev.h
+++ b/sys/include/dev.h
@@ -2,7 +2,37 @@
 #define _DEV_H
 
 #include <libfdt.h>
+#include <stdint.h> 
 
-void dev_init(struct fdt_header* fdt);
+enum { DT_MMUTYPE_SV32, DT_MMUTYPE_SV39, DT_MMUTYPE_SV48 };
+
+struct _reg {
+	fdt64_t address;
+	fdt64_t size;
+};
+/* unflattend device tree */ 
+struct devicetree {
+	const char *compat;
+	const char *model;
+	int nproc;
+	/* main cpu, monitor/alternative cores will be ignored for now */
+	struct {
+		short mmu_type;
+		const char *isa;
+		unsigned int freq;
+	} cpu;
+	struct {
+		uintptr_t origin;
+	 	uintptr_t size;
+	} memory;
+	struct {
+		unsigned int freq;
+		const char *compat;
+		int interrupt;
+		struct _reg reg;
+	} uart;
+};
+
+struct devicetree dev_init(struct fdt_header* fdt);
 
 #endif /* _DEV_H */