1 files changed, 84 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/mips/pt-machine.h b/linuxthreads/sysdeps/mips/pt-machine.h
new file mode 100644
index 0000000000..d15da7535b
--- /dev/null
+++ b/linuxthreads/sysdeps/mips/pt-machine.h
@@ -0,0 +1,84 @@
+/* Machine-dependent pthreads configuration and inline functions.
+
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>.
+   Based on the Alpha version 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   TODO: This version makes use of MIPS ISA 2 features.  It won't
+   work on ISA 1.  These machines will have to take the overhead of
+   a sysmips(MIPS_ATOMIC_SET, ...) syscall which isn't implemented
+   yet correctly.  There is however a better solution for R3000
+   uniprocessor machines possible.  */
+
+
+/* Spinlock implementation; required.  */
+extern inline long testandset(int *spinlock)
+{
+  long ret, temp;
+
+  __asm__ __volatile__(
+	"# Inline spinlock test & set\n\t"
+	".set\tmips2\n"
+	"1:\tll\t%0,%3\n\t"
+	"bnez\t%0,2f\n\t"
+	".set\tnoreorder\n\t"
+	"li\t%1,1\n\t"
+	".set\treorder\n\t"
+	"sc\t%1,%2\n\t"
+	"beqz\t%1,1b\n"
+	"2:\t.set\tmips0\n\t"
+	"/* End spinlock test & set */"
+	: "=&r"(ret), "=&r" (temp), "=m"(*spinlock)
+	: "m"(*spinlock)
+	: "memory");
+
+  return ret;
+}
+
+
+/* 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__ ("$29");
+
+
+/* Compare-and-swap for semaphores. */
+
+#define HAS_COMPARE_AND_SWAP
+extern inline int __compare_and_swap(long * p, long oldval, long newval)
+{
+  long ret;
+
+  __asm__ __volatile__ (
+	"/* Inline compare & swap */\n\t"
+	".set\tmips2\n"
+	"1:\tll\t%0,%4\n\t"
+	".set\tnoreorder\n\t"
+	"bne\t%0,%2,2f\n\t"
+	"move\t%0,%3\n\t"
+	".set\treorder\n\t"
+	"sc\t%0,%1\n\t"
+	"beqz\t%0,1b\n"
+	"2:\t.set\tmips0\n\t"
+	"/* End compare & swap */"
+	: "=&r"(ret), "=m"(*p)
+	: "r"(oldval), "r"(newval), "m"(*p));
+
+  return ret;
+}