| From 05b016ecf5e7a8c24409d8e9effb5d2ec9107708 Mon Sep 17 00:00:00 2001 |
| From: Vineet Gupta <vgupta@synopsys.com> |
| Date: Mon, 17 Jun 2013 18:27:23 +0530 |
| Subject: ARC: Setup Vector Table Base in early boot |
| |
| From: Vineet Gupta <vgupta@synopsys.com> |
| |
| commit 05b016ecf5e7a8c24409d8e9effb5d2ec9107708 upstream. |
| |
| 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> |
| Cc: Guenter Roeck <linux@roeck-us.net> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| arch/arc/kernel/head.S | 2 ++ |
| arch/arc/kernel/irq.c | 2 -- |
| 2 files changed, 2 insertions(+), 2 deletions(-) |
| |
| --- 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 ] |
| --- 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); |
| |
