[src/perseant-stdc-iso10646]: src/lib/libpthread/arch/arm 2167115

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4692cc1dfb1f
branches:  perseant-stdc-iso10646
changeset: 850666:4692cc1dfb1f
user:      skrll <skrll%NetBSD.org@localhost>
date:      Mon Jul 17 20:24:08 2017 +0000

description:
2167115

diffstat:

 lib/libpthread/arch/arm/pthread_md.h |  80 ++++++++++++++++++++++++++++++++++++
 1 files changed, 80 insertions(+), 0 deletions(-)

diffs (84 lines):

diff -r 9641cf0f1bec -r 4692cc1dfb1f lib/libpthread/arch/arm/pthread_md.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libpthread/arch/arm/pthread_md.h      Mon Jul 17 20:24:08 2017 +0000
@@ -0,0 +1,80 @@
+/*     $NetBSD: pthread_md.h,v 1.10.2.2 2017/07/17 20:24:08 skrll Exp $        */
+
+/*
+ * Copyright (c) 2001 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed for the NetBSD Project by
+ *     Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
+ * 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.
+ */
+
+#ifndef _LIB_PTHREAD_ARM_MD_H
+#define        _LIB_PTHREAD_ARM_MD_H
+
+static inline unsigned long
+pthread__sp(void)
+{
+       unsigned long ret;
+
+       __asm volatile("mov %0, sp"
+               : "=r" (ret));
+
+       return (ret);
+}
+
+#if defined(__thumb__) && defined(_ARM_ARCH_6)
+#define pthread__smt_pause()   __asm __volatile(".inst.n 0xbf20") /* wfe */
+#define pthread__smt_wake()    __asm __volatile(".inst.n 0xbf40") /* sev */
+#elif !defined(__thumb__)
+#define pthread__smt_pause()   __asm __volatile(".inst 0xe320f002") /* wfe */
+#define pthread__smt_wake()    __asm __volatile(".inst 0xe320f004") /* sev */
+#else
+#define pthread__smt_pause()
+#define pthread__smt_wake()
+#endif
+
+#define        pthread__uc_sp(ucp)     ((ucp)->uc_mcontext.__gregs[_REG_SP])
+
+/*
+ * Set initial, sane values for registers whose values aren't just
+ * "don't care".
+ */
+#ifdef __APCS_26__
+#define _INITCONTEXT_U_MD(ucp)                                         \
+/* Set R15_MODE_USR in the PC */                                       \
+       (ucp)->uc_mcontext.__gregs[_REG_PC] =                           \
+        ((ucp)->uc_mcontext.__gregs[_REG_PC] & 0x3fffffc) | 0x0;
+#else
+/* Set CPSR to PSR_USR32_MODE (0x10) from arm/armreg.h */
+#define _INITCONTEXT_U_MD(ucp)                                         \
+       (ucp)->uc_mcontext.__gregs[_REG_CPSR] = 0x10;
+#endif
+
+#endif /* _LIB_PTHREAD_ARM_MD_H */