;;; general have our C runtime code running to ask, so instead we set
;;; it by hand. -- WHN 2001-04-15
;;;
-;;; Though note that POSIX specifies (as far as I can tell)
-;;;
-;;; sysconf(_SC_PAGE_SIZE);
-;;;
-;;; as a portable way of retrieving this information; a call to this
-;;; could be made in grovel-headers (which, strictly speaking, would
-;;; no longer solely be grovelling headers), though the question of
-;;; how to make this information appear in GENESIS, which is built and
-;;; run from host-1 files (which are made before grovel-headers runs)
-;;; would remain. -- CSR, 2002-09-01
-(setf *backend-page-size* 4096)
-;;; comment from CMU CL:
-;;;
-;;; in case we ever wanted to do this for Windows NT..
-;;;
-;;; Windows NT uses a memory system granularity of 64K, which means
-;;; everything that gets mapped must be a multiple of that. The real
-;;; page size is 512, but that doesn't do us a whole lot of good.
-;;; Effectively, the page size is 64K.
-;;;
-;;; would be: (setf *backend-page-size* 65536)
+;;; Actually any information that we can retrieve C-side would be
+;;; useless in SBCL, since it's possible for otherwise binary
+;;; compatible systems to return different values for getpagesize().
+;;; -- JES, 2007-01-06
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (setf *backend-page-size* 4096))
+
+;;; The size in bytes of the GENCGC pages. Should be a multiple of the
+;;; architecture code size.
+(def!constant gencgc-page-size 4096)