PATCH: page related functions

[Johan Rydberg]

Hi,

I would really love for this functions to make it into libl4.
I don't know if kip.h is the right place, but I put them next
to the other page related functions.

2003-10-20  Johan Rydberg  <address@hidden>

        * l4/kip.h (l4_page_trunc): New function.
        (l4_page_round): Likewise.
        (l4_atop): Likewise.
        (l4_ptoa): Likewise.

Index: kip.h
===================================================================
RCS file: /cvsroot/hurd/hurd-l4/libl4/l4/kip.h,v
retrieving revision 1.7
diff -u -p -r1.7 kip.h
--- kip.h       5 Oct 2003 21:58:43 -0000       1.7
+++ kip.h       19 Oct 2003 22:22:35 -0000
@@ -470,6 +468,34 @@ l4_min_page_size (void)
   return L4_WORD_C(1) << l4_min_page_size_log2 ();
 }
 
+static inline l4_word_t
+__attribute__((__always_inline__))
+l4_page_trunc (l4_word_t addr)
+{
+  return (addr & ~(l4_min_page_size () - 1));
+}
+
+static inline l4_word_t
+__attribute__((__always_inline__))
+l4_page_round (l4_word_t addr)
+{
+  return ((addr + (l4_min_page_size () - 1)) 
+         & ~(l4_min_page_size () - 1));
+}
+
+static inline l4_word_t
+__attribute__((__always_inline__))
+l4_atop (l4_word_t addr)
+{
+  return ((addr) >> l4_min_page_size_log2 ());
+}
+
+static inline l4_word_t
+__attribute__((__always_inline__))
+l4_ptoa (l4_word_t p)
+{
+  return ((p) << l4_min_page_size_log2 ());
+}
 
 static inline l4_page_info_t
 __attribute__((__always_inline__))