1 files changed, 9 insertions, 0 deletions

diff --git a/firmware/export/pp5020.h b/firmware/export/pp5020.h
index 3d205a0ea1..a34f1251c9 100644
--- a/firmware/export/pp5020.h
+++ b/firmware/export/pp5020.h
@@ -30,6 +30,15 @@
 #define PROC_ID_CPU      0x55
 #define PROC_ID_COP      0xaa
 
+/* Mailboxes */
+/* Each processor has two mailboxes it can write to and two which
+   it can read from.  We define the first to be for sending messages
+   and the second for replying to messages */
+#define CPU_MESSAGE      (*(volatile unsigned long *)(0x60001000))
+#define COP_MESSAGE      (*(volatile unsigned long *)(0x60001004))
+#define CPU_REPLY        (*(volatile unsigned long *)(0x60001008))
+#define COP_REPLY        (*(volatile unsigned long *)(0x6000100c))
+
 /* Interrupts */
 #define CPU_INT_STAT        (*(volatile unsigned long*)(0x64004000))
 #define COP_INT_STAT        (*(volatile unsigned long*)(0x60004004))