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3960
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1 /*
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2007, 2008, 2010 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef OS_CPU_BSD_ZERO_VM_OS_BSD_ZERO_HPP
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27 #define OS_CPU_BSD_ZERO_VM_OS_BSD_ZERO_HPP
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28
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29 static void setup_fpu() {}
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30
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31 static bool is_allocatable(size_t bytes);
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32
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33 // Used to register dynamic code cache area with the OS
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34 // Note: Currently only used in 64 bit Windows implementations
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35 static bool register_code_area(char *low, char *high) { return true; }
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36
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37 // Atomically copy 64 bits of data
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38 static void atomic_copy64(volatile void *src, volatile void *dst) {
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39 #if defined(PPC) && !defined(_LP64)
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40 double tmp;
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41 asm volatile ("lfd %0, 0(%1)\n"
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42 "stfd %0, 0(%2)\n"
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43 : "=f"(tmp)
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44 : "b"(src), "b"(dst));
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45 #elif defined(S390) && !defined(_LP64)
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46 double tmp;
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47 asm volatile ("ld %0, 0(%1)\n"
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48 "std %0, 0(%2)\n"
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49 : "=r"(tmp)
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50 : "a"(src), "a"(dst));
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51 #else
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52 *(jlong *) dst = *(jlong *) src;
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53 #endif
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54 }
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55
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56 #endif // OS_CPU_BSD_ZERO_VM_OS_BSD_ZERO_HPP
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