From 8df790f38fc6501dadb8302ef4a236525bb7d2c4 Mon Sep 17 00:00:00 2001
From: rwatson <rwatson@FreeBSD.org>
Date: Sun, 19 Apr 2009 20:19:13 +0000
Subject: For each architecture, define CACHE_LINE_SHIFT and a derived
 CACHE_LINE_SIZE constant.  These constants are intended to over-estimate the
 cache line size, and be used at compile-time when a run-time tuning
 alternative isn't appropriate or available.

Defaults for all architectures are 64 bytes, except powerpc
where it is 128 bytes (used on G5 systems).

MFC after:	2 weeks
Discussed on:   arch@
---
 sys/amd64/include/param.h   | 4 ++++
 sys/arm/include/param.h     | 5 +++++
 sys/i386/include/param.h    | 5 +++++
 sys/ia64/include/param.h    | 5 +++++
 sys/mips/include/param.h    | 5 +++++
 sys/powerpc/include/param.h | 5 +++++
 sys/sparc64/include/param.h | 5 +++++
 sys/sun4v/include/param.h   | 5 +++++
 8 files changed, 39 insertions(+)

diff --git a/sys/amd64/include/param.h b/sys/amd64/include/param.h
index 82e439f..7cf1286 100644
--- a/sys/amd64/include/param.h
+++ b/sys/amd64/include/param.h
@@ -89,6 +89,10 @@
 #define	ALIGN(p)		_ALIGN(p)
 #define	ALIGNED_POINTER(p,t)	_ALIGNED_POINTER(p,t)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
 
 /* Size of the level 1 page table units */
 #define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
diff --git a/sys/arm/include/param.h b/sys/arm/include/param.h
index 8fb8555..6e3ee59 100644
--- a/sys/arm/include/param.h
+++ b/sys/arm/include/param.h
@@ -81,6 +81,11 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define	PAGE_SHIFT	12
 #define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
 #define	PAGE_MASK	(PAGE_SIZE - 1)
diff --git a/sys/i386/include/param.h b/sys/i386/include/param.h
index 265337a..d9a3cda 100644
--- a/sys/i386/include/param.h
+++ b/sys/i386/include/param.h
@@ -74,6 +74,11 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
 #define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
 #define PAGE_MASK	(PAGE_SIZE-1)
diff --git a/sys/ia64/include/param.h b/sys/ia64/include/param.h
index acea690..f9a9c4a 100644
--- a/sys/ia64/include/param.h
+++ b/sys/ia64/include/param.h
@@ -99,6 +99,11 @@
 #define	ALIGN(p)		_ALIGN(p)
 #define ALIGNED_POINTER(p,t)	_ALIGNED_POINTER(p,t)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #ifndef LOG2_PAGE_SIZE
 #define	LOG2_PAGE_SIZE		13		/* 8K pages by default. */
 #endif
diff --git a/sys/mips/include/param.h b/sys/mips/include/param.h
index 5acdfdf..55f877f 100644
--- a/sys/mips/include/param.h
+++ b/sys/mips/include/param.h
@@ -89,6 +89,11 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define	NBPG		4096		/* bytes/page */
 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
 #define	PGSHIFT		12		/* LOG2(NBPG) */
diff --git a/sys/powerpc/include/param.h b/sys/powerpc/include/param.h
index 1a910ba..7dddb30 100644
--- a/sys/powerpc/include/param.h
+++ b/sys/powerpc/include/param.h
@@ -79,6 +79,11 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	7
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define	PAGE_SHIFT	12
 #define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
 #define	PAGE_MASK	(PAGE_SIZE - 1)
diff --git a/sys/sparc64/include/param.h b/sys/sparc64/include/param.h
index 8a1c7df..e8f783f 100644
--- a/sys/sparc64/include/param.h
+++ b/sys/sparc64/include/param.h
@@ -71,6 +71,11 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define	PAGE_SHIFT_8K	13
 #define	PAGE_SIZE_8K	(1L<<PAGE_SHIFT_8K)
 #define	PAGE_MASK_8K	(PAGE_SIZE_8K-1)
diff --git a/sys/sun4v/include/param.h b/sys/sun4v/include/param.h
index 0ac9c9b..4d7b42e 100644
--- a/sys/sun4v/include/param.h
+++ b/sys/sun4v/include/param.h
@@ -71,6 +71,11 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+#ifndef CACHE_LINE_SHIFT
+#define	CACHE_LINE_SHIFT	6
+#endif
+#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
+
 #define	PAGE_SHIFT_8K	13
 #define	PAGE_SIZE_8K	(1L<<PAGE_SHIFT_8K)
 #define	PAGE_MASK_8K	(PAGE_SIZE_8K-1)
-- 
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