summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h
diff options
context:
space:
mode:
authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
commite1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch)
tree2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h
parent6b6ede3d15f04fe825cfa9f697507457e3640344 (diff)
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h')
-rw-r--r--libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h126
1 files changed, 126 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h
new file mode 100644
index 000000000..b47343ba7
--- /dev/null
+++ b/libpthread/linuxthreads.old/sysdeps/alpha/pt-machine.h
@@ -0,0 +1,126 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ Alpha version.
+ Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson <rth@tamu.edu>.
+
+ 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
+
+#include <features.h>
+
+#ifndef PT_EI
+# define PT_EI __extern_always_inline
+#endif
+
+#ifdef __linux__
+# include <asm/pal.h>
+#else
+# include <machine/pal.h>
+#endif
+
+/* 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 stack_pointer
+register char *stack_pointer __asm__("$30");
+
+
+/* Memory barrier; default is to do nothing */
+#define MEMORY_BARRIER() __asm__ __volatile__("mb" : : : "memory")
+/* Write barrier. */
+#define WRITE_MEMORY_BARRIER() __asm__ __volatile__("wmb" : : : "memory")
+
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ long int ret, temp;
+
+ __asm__ __volatile__(
+ "/* Inline spinlock test & set */\n"
+ "1:\t"
+ "ldl_l %0,%3\n\t"
+ "bne %0,2f\n\t"
+ "or $31,1,%1\n\t"
+ "stl_c %1,%2\n\t"
+ "beq %1,1b\n"
+ "2:\tmb\n"
+ "/* End spinlock test & set */"
+ : "=&r"(ret), "=&r"(temp), "=m"(*spinlock)
+ : "m"(*spinlock)
+ : "memory");
+
+ return ret;
+}
+
+
+/* Begin allocating thread stacks at this address. Default is to allocate
+ them just below the initial program stack. */
+#define THREAD_STACK_START_ADDRESS 0x40000000000
+
+
+/* Return the thread descriptor for the current thread. */
+#define THREAD_SELF \
+({ \
+ register pthread_descr __self __asm__("$0"); \
+ __asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq)); \
+ __self; \
+})
+
+/* Initialize the thread-unique value. */
+#define INIT_THREAD_SELF(descr, nr) \
+{ \
+ register pthread_descr __self __asm__("$16") = (descr); \
+ __asm__ __volatile__ ("call_pal %1" : : "r"(__self), "i"(PAL_wruniq)); \
+}
+
+
+/* Compare-and-swap for semaphores. */
+
+#define HAS_COMPARE_AND_SWAP
+PT_EI int
+__compare_and_swap (long int *p, long int oldval, long int newval)
+{
+ long int ret;
+
+ __asm__ __volatile__ (
+ "/* Inline compare & swap */\n"
+ "1:\t"
+ "ldq_l %0,%4\n\t"
+ "cmpeq %0,%2,%0\n\t"
+ "beq %0,2f\n\t"
+ "mov %3,%0\n\t"
+ "stq_c %0,%1\n\t"
+ "beq %0,1b\n\t"
+ "2:\tmb\n"
+ "/* End compare & swap */"
+ : "=&r"(ret), "=m"(*p)
+ : "r"(oldval), "r"(newval), "m"(*p)
+ : "memory");
+
+ return ret;
+}
+
+/* We want the OS to assign stack addresses. */
+#define FLOATING_STACKS 1
+
+/* Maximum size of the stack if the rlimit is unlimited. */
+#define ARCH_STACK_MAX_SIZE 32*1024*1024
+
+#endif /* pt-machine.h */