X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/e5568f75972dfc723778653c11cb6b4dc825716a..060df5ea7c632b1ac8cc8aac1fb59758165c2084:/osfmk/i386/commpage/cacheflush.s

diff --git a/osfmk/i386/commpage/cacheflush.s b/osfmk/i386/commpage/cacheflush.s
index 078494ec6..4d9e98b0b 100644
--- a/osfmk/i386/commpage/cacheflush.s
+++ b/osfmk/i386/commpage/cacheflush.s
@@ -1,38 +1,79 @@
 /*
- * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
-#include <sys/appleapiopts.h>
 #include <machine/cpu_capabilities.h>
 #include <machine/commpage.h>
 
-        .text
-        .align  2, 0x90
+// void sysFlushDcache( void *p, size_t len );
+// 32-bit version
 
-Lsys_flush_dcache:
+COMMPAGE_FUNCTION_START(sys_flush_dcache, 32, 4)
+	movl	8(%esp),%ecx		// get length
+	movl	4(%esp),%edx		// get ptr
+	testl	%ecx,%ecx		// length 0?
+	jz	2f			// yes
+	mfence				// ensure previous stores make it to memory
+	clflush	-1(%edx,%ecx)		// make sure last line is flushed
+1:
+	clflush	(%edx)			// flush a line
+	addl	$64,%edx
+	subl	$64,%ecx
+	ja	1b
+	mfence				// make sure memory is updated before we return
+2:
 	ret
+COMMPAGE_DESCRIPTOR(sys_flush_dcache,_COMM_PAGE_FLUSH_DCACHE,kCache64,0)
 
-	COMMPAGE_DESCRIPTOR(sys_flush_dcache,_COMM_PAGE_FLUSH_DCACHE,0,0)
 
-Lsys_icache_invalidate:
+// void sysFlushDcache( void *p, size_t len );
+// 64-bit version
+// %rdi = ptr,  %rsi = length
+COMMPAGE_FUNCTION_START(sys_flush_dcache_64, 64, 4)
+	testq	%rsi,%rsi		// length 0?
+	jz	2f			// yes
+	mfence				// ensure previous stores make it to memory
+	clflush	-1(%rdi,%rsi)		// make sure last line is flushed
+1:
+	clflush	(%rdi)			// flush a line
+	addq	$64,%rdi
+	subq	$64,%rsi
+	ja	1b
+	mfence				// make sure memory is updated before we return
+2:
 	ret
+COMMPAGE_DESCRIPTOR(sys_flush_dcache_64,_COMM_PAGE_FLUSH_DCACHE,kCache64,0)
+
+// void sysIcacheInvalidate( void *p, size_t len );
 
-	COMMPAGE_DESCRIPTOR(sys_icache_invalidate,_COMM_PAGE_FLUSH_ICACHE,0,0)
+COMMPAGE_FUNCTION_START(sys_icache_invalidate, 32, 4)
+	// This is a NOP on intel processors, since the intent of the API
+	// is to make data executable, and Intel L1Is are coherent with L1D.
+	// We can use same routine both in 32 and 64-bit mode, since it is
+	// just a RET instruction.
+	ret
+COMMPAGE_DESCRIPTOR(sys_icache_invalidate,_COMM_PAGE_FLUSH_ICACHE,0,0)