X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=arch%2Farc%2Fkernel%2Fprocess.c;h=fdd89715d2d3783f8a1302513c10a15d138ded91;hb=af76004cf8b4f368583bda22d7e348e40a338b91;hp=07a3a968fe49a113e94c2a894895db09362108ac;hpb=d4c90b1b9fe907da0d310008e5a769b591a14399;p=cascardo%2Flinux.git

diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index 07a3a968fe49..fdd89715d2d3 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -150,6 +150,29 @@ int copy_thread(unsigned long clone_flags,
 	return 0;
 }
 
+/*
+ * Do necessary setup to start up a new user task
+ */
+void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp)
+{
+	set_fs(USER_DS); /* user space */
+
+	regs->sp = usp;
+	regs->ret = pc;
+
+	/*
+	 * [U]ser Mode bit set
+	 * [L] ZOL loop inhibited to begin with - cleared by a LP insn
+	 * Interrupts enabled
+	 */
+	regs->status32 = STATUS_U_MASK | STATUS_L_MASK |
+			 STATUS_E1_MASK | STATUS_E2_MASK;
+
+	/* bogus seed values for debugging */
+	regs->lp_start = 0x10;
+	regs->lp_end = 0x80;
+}
+
 /*
  * Some archs flush debug and FPU info here
  */