From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] introduce region_overlap() function
Date: Fri, 5 Oct 2012 18:45:03 +0200 [thread overview]
Message-ID: <1349455505-31731-3-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1349455505-31731-1-git-send-email-s.hauer@pengutronix.de>
To check if two regions overlap
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/common.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/common.h b/include/common.h
index c1f44b4..e30774a 100644
--- a/include/common.h
+++ b/include/common.h
@@ -256,4 +256,17 @@ static inline void barebox_banner(void) {}
(__x < 0) ? -__x : __x; \
})
+/*
+ * Check if two regions overlap. returns true if they do, false otherwise
+ */
+static inline bool region_overlap(unsigned long starta, unsigned long lena,
+ unsigned long startb, unsigned long lenb)
+{
+ if (starta + lena <= startb)
+ return 0;
+ if (startb + lenb <= starta)
+ return 0;
+ return 1;
+}
+
#endif /* __COMMON_H_ */
--
1.7.10.4
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next prev parent reply other threads:[~2012-10-05 16:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-05 16:45 [PATCH] cleanup arm startup a bit Sascha Hauer
2012-10-05 16:45 ` [PATCH 1/4] ARM: add assembly function for setting up C environment Sascha Hauer
2012-10-05 16:45 ` Sascha Hauer [this message]
2012-10-05 19:55 ` [PATCH 2/4] introduce region_overlap() function Robert Jarzmik
2012-10-05 21:33 ` Sascha Hauer
2012-10-06 19:44 ` Robert Jarzmik
2012-10-07 6:59 ` Antony Pavlov
2012-10-05 16:45 ` [PATCH 3/4] ARM: cleanup piggydata copy check Sascha Hauer
2012-10-05 16:45 ` [PATCH 4/4] ARM: simplify start.c Sascha Hauer
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