ARC: Setup Vector Table Base in early boot

Otherwise early boot exceptions such as instructions errors due to
configuration mismatch between kernel and hardware go off to la-la land,
as opposed to hitting the handler and panic()'ing properly.

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

diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
index 006dec3fc3534cbbf179e5c0d002d7c3c258a7af..2a913f85a74793ae47c19e90deea0f9ef69793e1 100644 (file)
--- a/arch/arc/kernel/head.S
+++ b/arch/arc/kernel/head.S
@@ -27,6 +27,8 @@ stext:
        ; Don't clobber r0-r4 yet. It might have bootloader provided info
        ;-------------------------------------------------------------------
 
+       sr      @_int_vec_base_lds, [AUX_INTR_VEC_BASE]
+
 #ifdef CONFIG_SMP
        ; Only Boot (Master) proceeds. Others wait in platform dependent way
        ;       IDENTITY Reg [ 3  2  1  0 ]

diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
index d1ef4129de7d7ca22fa56f287174dbb636c432ea..4918a66a1d8ecbaa34d8aaabd819b2d373c19b89 100644 (file)
--- a/arch/arc/kernel/irq.c
+++ b/arch/arc/kernel/irq.c
@@ -32,8 +32,6 @@ void __cpuinit arc_init_IRQ(void)
 {
        int level_mask = 0;
 
-       write_aux_reg(AUX_INTR_VEC_BASE, _int_vec_base_lds);
-
        /* Disable all IRQs: enable them as devices request */
        write_aux_reg(AUX_IENABLE, 0);