1 files changed, 94 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S
new file mode 100644
index 000000000000..5880b270bd50
--- /dev/null
+++ b/arch/blackfin/kernel/entry.S
@@ -0,0 +1,94 @@
+/*
+ * File:         arch/blackfin/kernel/entry.S
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/errno.h>
+#include <asm/asm-offsets.h>
+
+#include <asm/mach-common/context.S>
+
+#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
+.section .l1.text
+#else
+.text
+#endif
+
+ENTRY(_ret_from_fork)
+        SP += -12;
+        call _schedule_tail;
+        SP += 12;
+        r0 = [sp + PT_IPEND];
+        cc = bittst(r0,1);
+        if cc jump .Lin_kernel;
+        RESTORE_CONTEXT
+        rti;
+.Lin_kernel:
+        bitclr(r0,1);
+        [sp + PT_IPEND] = r0;
+        /* do a 'fake' RTI by jumping to [RETI]
+         * to avoid clearing supervisor mode in child
+        */
+        RESTORE_ALL_SYS
+        p0 = reti;
+        jump (p0);
+
+ENTRY(_sys_fork)
+        r0 = -EINVAL;
+        rts;
+
+ENTRY(_sys_vfork)
+        r0 = sp;
+        r0 += 24;
+        [--sp] = rets;
+        SP += -12;
+        call _bfin_vfork;
+        SP += 12;
+        rets = [sp++];
+        rts;
+
+ENTRY(_sys_clone)
+        r0 = sp;
+        r0 += 24;
+        [--sp] = rets;
+        SP += -12;
+        call _bfin_clone;
+        SP += 12;
+        rets = [sp++];
+        rts;
+
+ENTRY(_sys_rt_sigreturn)
+        r0 = sp;
+        r0 += 24;
+        [--sp] = rets;
+        SP += -12;
+        call _do_rt_sigreturn;
+        SP += 12;
+        rets = [sp++];
+        rts;