6693457: Open-source hotspot linux-sparc support

Move os_cpu/linux_sparc from closed to open

Reviewed-by: kamg

hotspot/src/os_cpu/linux_sparc/vm/linux_sparc.s

@@ -0,0 +1,105 @@
+#
+# Copyright 2005-2007 Sun Microsystems, Inc.  All Rights Reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+#
+# This code 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 General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+# CA 95054 USA or visit www.sun.com if you need additional information or
+# have any questions.
+#
+
+    # Prototype: int SafeFetch32 (int * adr, int ErrValue)
+    # The "ld" at Fetch32 is potentially faulting instruction.
+    # If the instruction traps the trap handler will arrange
+    # for control to resume at Fetch32Resume.  
+    # By convention with the trap handler we ensure there is a non-CTI
+    # instruction in the trap shadow.  
+        
+
+    .globl  SafeFetch32, Fetch32PFI, Fetch32Resume
+    .globl  SafeFetchN
+    .align  32
+    .type    SafeFetch32,@function
+SafeFetch32:        
+    mov     %o0, %g1
+    mov     %o1, %o0
+Fetch32PFI:
+    # <-- Potentially faulting instruction
+    ld      [%g1], %o0         
+Fetch32Resume:
+    nop
+    retl
+    nop
+
+    .globl  SafeFetchN, FetchNPFI, FetchNResume
+    .type    SafeFetchN,@function
+    .align  32
+SafeFetchN:
+    mov     %o0, %g1
+    mov     %o1, %o0
+FetchNPFI:
+    ldn     [%g1], %o0
+FetchNResume:
+    nop
+    retl
+    nop
+
+    # Possibilities:
+    # -- membar
+    # -- CAS (SP + BIAS, G0, G0)
+    # -- wr %g0, %asi
+
+    .globl SpinPause
+    .type   SpinPause,@function
+    .align  32
+SpinPause:      
+    retl
+    mov %g0, %o0
+
+   .globl _Copy_conjoint_jlongs_atomic
+   .type   _Copy_conjoint_jlongs_atomic,@function
+_Copy_conjoint_jlongs_atomic:
+        cmp     %o0, %o1
+	bleu    4f
+	sll     %o2, 3, %o4
+        ba      2f
+   1:
+	subcc   %o4, 8, %o4
+	std     %o2, [%o1]
+	add     %o0, 8, %o0
+	add     %o1, 8, %o1
+   2:
+	bge,a   1b
+	ldd     [%o0], %o2
+	ba      5f
+        nop
+   3:
+	std     %o2, [%o1+%o4]
+   4:
+	subcc   %o4, 8, %o4
+	bge,a   3b
+	ldd     [%o0+%o4], %o2
+   5:      
+	retl
+	nop
+
+
+    .globl _flush_reg_windows
+    .align 32
+ _flush_reg_windows:
+        ta 0x03
+        retl
+        mov     %fp, %o0