kernel: Break out kernel primitives into separate files and move to separate dir.

No code changed, just shuffling stuff around. This should make it easier to
build only select parts kernel and use different implementations.

Change-Id: Ie1f00f93008833ce38419d760afd70062c5e22b5

1 files changed, 4 insertions, 1 deletions

diff --git a/firmware/export/system.h b/firmware/export/system.h
index 25f9287618..1dab352071 100644
--- a/firmware/export/system.h
+++ b/firmware/export/system.h
@@ -24,7 +24,6 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-
 #include "cpu.h"
 #include "gcc_extensions.h" /* for LIKELY/UNLIKELY */
 
@@ -86,6 +85,10 @@ int get_cpu_boost_counter(void);
 
 #define BAUDRATE 9600
 
+/* wrap-safe macros for tick comparison */
+#define TIME_AFTER(a,b)         ((long)(b) - (long)(a) < 0)
+#define TIME_BEFORE(a,b)        TIME_AFTER(b,a)
+
 #ifndef NULL
 #define NULL ((void*)0)
 #endif