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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
commit6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch)
treebbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads/sysdeps/c6x/pt-machine.h
parent398a27a5b323956344b4f831d892fed3bd9813c7 (diff)
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence of NPTL/TLS for well supported architectures. There is no reason to use LT.new for ARM/MIPS or other architectures supporting NPTL/TLS. It is not available for noMMU architectures like Blackfin or FR-V. To simplify the live of the few uClibc-ng developers, LT.new is removed and LT.old is renamed to LT. LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/c6x/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/c6x/pt-machine.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/c6x/pt-machine.h b/libpthread/linuxthreads/sysdeps/c6x/pt-machine.h
new file mode 100644
index 000000000..5e8bfca56
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/c6x/pt-machine.h
@@ -0,0 +1,63 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ C6x version.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Aurelien Jacquiot <aurelien.jacquiot@jaluna.com>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* Spinlock implementation; required. */
+static inline long int
+testandset (int *spinlock)
+{
+ register unsigned int ret = 1;
+ int dummy;
+ __asm__ __volatile__ ("mvc .s2 CSR, %0\n\tand .s2 -2, %0, %0\n\tmvc .s2 %0, CSR\n"
+ : "=b" (dummy));
+
+ if (*spinlock == 0) {
+ *spinlock = 1;
+ ret = 0;
+ }
+ __asm__ __volatile__ ("mvc .s2 CSR, %0\n\tor .s2 1, %0, %0\n\tmvc .s2 %0, CSR\n"
+ : "=b" (dummy));
+ return ret;
+}
+
+#define WRITE_MEMORY_BARRIER()
+#define READ_MEMORY_BARRIER()
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame. */
+#define CURRENT_STACK_FRAME get_stack_pointer()
+static inline char * get_stack_pointer(void)
+{
+ char *sp;
+ __asm__ __volatile__ ("mv .d2 B15, %0" : "=b" (sp));
+ return sp;
+}
+
+#define THREAD_STACK_OFFSET 8
+
+#endif /* pt-machine.h */