ARC port to uClibc

For this port, I would like to give due credit to:

- Folks from Codito technologies (Sameer, Amit, Kanika, Ramana,...)
   who did the very first port

- ARC UK from 2007-2009 (Joern, Irfan, Khurram, Phil...

- Late Brendan Kehoe (may he RIP)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arc/bits/uClibc_page.h b/libc/sysdeps/linux/arc/bits/uClibc_page.h
new file mode 100755
index 000000000..26cec54c9
--- /dev/null
+++ b/libc/sysdeps/linux/arc/bits/uClibc_page.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _UCLIBC_PAGE_H
+#define _UCLIBC_PAGE_H
+
+/*
+ * ARC700/linux supports 4k, 8k, 16k pages (build time).
+ * We rely on the kernel exported header (aka uapi headers since 3.8)
+ * for PAGE_SIZE and friends. This avoids hand-editing here when building
+ * toolchain.
+ *
+ * Although uClibc determines page size dynamically, from kernel's auxv which
+ * ARC Linux does pass, still the generic code needs a fall back
+ *  _dl_pagesize = auxvt[AT_PAGESZ].a_un.a_val ? : PAGE_SIZE
+ *
+ */
+#include <asm/page.h>
+
+/* TBD: fix this with runtime value for a PAGE_SIZE agnostic uClibc */
+#define MMAP2_PAGE_SHIFT PAGE_SHIFT
+
+#endif /* _UCLIBC_PAGE_H */