X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86-64%2Fbackend-parms.lisp;h=595ff0aa58cad88240fe8317aefa262c12ea8969;hb=2dbf6e6a5011edecc5361c208e9d5915ca783351;hp=1ef5f6fb4a145cb2fbb79973f0c9512570e59b69;hpb=78fa16bf55be44cc16845be84d98023e83fb14bc;p=sbcl.git

diff --git a/src/compiler/x86-64/backend-parms.lisp b/src/compiler/x86-64/backend-parms.lisp
index 1ef5f6f..595ff0a 100644
--- a/src/compiler/x86-64/backend-parms.lisp
+++ b/src/compiler/x86-64/backend-parms.lisp
@@ -28,24 +28,13 @@
 ;;; 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)