/*
- * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * 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.
- *
- * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * 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.
+ *
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_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)
- COMMPAGE_DESCRIPTOR(sys_icache_invalidate,_COMM_PAGE_FLUSH_ICACHE,0,0)
+// void sysIcacheInvalidate( void *p, size_t len );
+
+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)
projects / apple / xnu.git / blobdiff