diff --git a/include/kernel/kernel.h b/include/kernel/kernel.h
index caabcfe..0684f3c 100644
--- a/include/kernel/kernel.h
+++ b/include/kernel/kernel.h
@@ -1,11 +1,16 @@
 #pragma once
 
+#include "kernel_defs.h"
+
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
 #include <cstdint>
+
+extern void KernelReadSRs(sr_table_t* table);
+extern void KernelWriteSRs(sr_table_t* table);
 extern void KernelCopyData(uint32_t dst, uint32_t src, uint32_t len);
 
 void KernelReadPTE(uint32_t outputAddr, int32_t length);
diff --git a/include/kernel/kernel_defs.h b/include/kernel/kernel_defs.h
new file mode 100644
index 0000000..ff1d917
--- /dev/null
+++ b/include/kernel/kernel_defs.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _sr_table_t {
+    uint32_t value[16];
+    uint32_t sdr1;
+} sr_table_t;
+
+typedef struct _bat_t {
+    uint32_t h;
+    uint32_t l;
+} bat_t;
+
+typedef struct _bat_table_t {
+    bat_t bat[8];
+} bat_table_t;
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/source/kernel.def b/source/kernel.def
index 932a843..eb3e6a2 100644
--- a/source/kernel.def
+++ b/source/kernel.def
@@ -1,4 +1,6 @@
 :NAME homebrew_kernel
 
 :TEXT
-KernelCopyData
\ No newline at end of file
+KernelCopyData
+KernelWriteSRs
+KernelReadSRs
\ No newline at end of file