ARC: make start_thread() out-of-line

Helps move out ISA specific bits from a arch exported header

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 23 insertions, 0 deletions

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
@@ -151,6 +151,29 @@ int copy_thread(unsigned long clone_flags,
 }
 
 /*
+ * 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
  */
 void flush_thread(void)