a6ecba4d23
No cacheflush for LP64; use the GCC builtin instead. Clean up the 32-bit MIPS implementation now we no longer need to worry about old versions of GCC. Bug: 12924756 Change-Id: Ie23955b3ec194e226c4b2bce35b11d5e061f4753
63 lines
2.5 KiB
C++
63 lines
2.5 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <sys/cachectl.h>
|
|
|
|
#include "private/libc_logging.h"
|
|
|
|
// Linux historically defines a cacheflush(3) routine for MIPS
|
|
// with this signature:
|
|
|
|
// int cacheflush(char *addr, int nbytes, int cache);
|
|
|
|
// Android defines an alternate cacheflush routine which exposes the
|
|
// ARM system call interface:
|
|
|
|
// int cacheflush (long start, long end, long flags)
|
|
|
|
// This is an attempt to maintain compatibility between the historical MIPS
|
|
// usage for software previously ported to MIPS and Android specific
|
|
// uses of cacheflush().
|
|
|
|
int cacheflush(long start, long end, long /*flags*/) {
|
|
if (end < start) {
|
|
// It looks like this is really a MIPS-style cacheflush call.
|
|
static bool warned = false;
|
|
if (!warned) {
|
|
__libc_format_log(ANDROID_LOG_WARN, "libc", "cacheflush called with (start,len) instead of (start,end)");
|
|
warned = true;
|
|
}
|
|
end += start;
|
|
}
|
|
|
|
// Use the GCC builtin. This will generate inline synci instructions if available,
|
|
// or call _flush_cache(start, len, BCACHE) directly.
|
|
__builtin___clear_cache(reinterpret_cast<char*>(start), reinterpret_cast<char*>(end));
|
|
return 0;
|
|
}
|