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authorVineet Gupta <vgupta@synopsys.com>2014-04-18 12:19:59 +0530
committerVineet Gupta <vgupta@synopsys.com>2014-05-05 14:22:12 +0530
commit2ab402dfd65d15a4b25a8756272ababe3ef76884 (patch)
tree7b8535d6b2998744c5a4136c29e3c73048d3f2e0 /arch/arc/kernel/process.c
parentd75386363ee60eb51c933c7b5e536f3a502ad7d7 (diff)
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>
Diffstat (limited to 'arch/arc/kernel/process.c')
-rw-r--r--arch/arc/kernel/process.c23
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)