[U-Boot] [PATCH v2 3/7] bootcount: Add function wrappers to handle bootcount increment and error checking

[Lukasz Majewski]

Those two functions can be used to provide easy bootcount management.

Signed-off-by: Lukasz Majewski <lukma at denx.de>

---

Changes in v2:
- None

 include/bootcount.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/include/bootcount.h b/include/bootcount.h
index e3b3f7028e..0ec9af6e2b 100644
--- a/include/bootcount.h
+++ b/include/bootcount.h
@@ -40,4 +40,29 @@ static inline u32 raw_bootcount_load(volatile u32 *addr)
 	return in_be32(addr);
 }
 #endif
+
+#ifdef CONFIG_SPL_BOOTCOUNT_LIMIT
+static inline bool bootcount_error(void)
+{
+	unsigned long bootcount = bootcount_load();
+	unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
+
+	if (bootlimit && (bootcount > bootlimit)) {
+		printf("Warning: Bootlimit (%lu) exceeded.\n", bootlimit);
+		return true;
+	}
+
+	return false;
+}
+
+static inline void bootcount_inc(void)
+{
+	unsigned long bootcount = bootcount_load();
+
+	bootcount_store(++bootcount);
+}
+#else
+static inline bool bootcount_error(void) { return false; }
+static inline void bootcount_inc(void) {}
+#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT */
 #endif /* _BOOTCOUNT_H__ */
-- 
2.11.0