/*
* Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_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 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.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <machine/cpu_capabilities.h>
#include <machine/commpage.h>
.text
.align 2, 0x90
// void sysFlushDcache( void *p, size_t len )
Lsys_flush_dcache:
movl 4(%esp),%ecx // get length
movl 8(%esp),%edx // get ptr
testl %ecx,%ecx // length 0?
jz 2f // yes
mfence // ensure previous stores make it to memory
1:
clflush (%edx) // flush a line
addl $64,%edx
subl $64,%ecx
jnc 1b
mfence // make sure memory is updated before we return
2:
ret
COMMPAGE_DESCRIPTOR(sys_flush_dcache,_COMM_PAGE_FLUSH_DCACHE,kCache64,0)
// void sysFlushDcache( void *p, size_t len ) .code64
Lsys_flush_dcache_64: // %rdi = ptr, %rsi = length
testq %rsi,%rsi // length 0?
jz 2f // yes
mfence // ensure previous stores make it to memory
1:
clflush (%rdi) // flush a line
addq $64,%rdi
subq $64,%rsi
jnc 1b
mfence // make sure memory is updated before we return
2:
ret
.code32
COMMPAGE_DESCRIPTOR(sys_flush_dcache_64,_COMM_PAGE_FLUSH_DCACHE,kCache64,0)
// void sysIcacheInvalidate( void *p, size_t len )Lsys_icache_invalidate:
// 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)