Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1402372 > unrolled thread

[PATCH 1/3] MIPS: Clear Status IPL field when using EIC

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [PATCH 1/3] MIPS: Clear Status IPL field when using EIC Paul Burton <paul.burton@imgtec.com> - 2016-05-17 16:40 +0200
    Re: [PATCH 1/3] MIPS: Clear Status IPL field when using EIC Matt Redfearn <matt.redfearn@imgtec.com> - 2016-05-18 09:00 +0200

#1402372 — [PATCH 1/3] MIPS: Clear Status IPL field when using EIC

When using an external interrupt controller (EIC) the interrupt mask
bits in the cop0 Status register are reused for the Interrupt Priority
Level, and any interrupts with a priority lower than the field will be
ignored. Clear the field to 0 by default such that all interrupts are
serviced. Without doing so we default to arbitrarily ignoring all or
some subset of interrupts.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---

 arch/mips/kernel/irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 8eb5af8..f25f7ea 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -54,6 +54,9 @@ void __init init_IRQ(void)
 	for (i = 0; i < NR_IRQS; i++)
 		irq_set_noprobe(i);
 
+	if (cpu_has_veic)
+		clear_c0_status(ST0_IM);
+
 	arch_init_irq();
 }
 
-- 
2.8.2

[toc] | [next] | [standalone]

#1402745

On 17/05/16 15:31, Paul Burton wrote:
> When using an external interrupt controller (EIC) the interrupt mask
> bits in the cop0 Status register are reused for the Interrupt Priority
> Level, and any interrupts with a priority lower than the field will be
> ignored. Clear the field to 0 by default such that all interrupts are
> serviced. Without doing so we default to arbitrarily ignoring all or
> some subset of interrupts.
>
> Signed-off-by: Paul Burton <paul.burton@imgtec.com>
> ---
>
>   arch/mips/kernel/irq.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
> index 8eb5af8..f25f7ea 100644
> --- a/arch/mips/kernel/irq.c
> +++ b/arch/mips/kernel/irq.c
> @@ -54,6 +54,9 @@ void __init init_IRQ(void)
>   	for (i = 0; i < NR_IRQS; i++)
>   		irq_set_noprobe(i);
>   
> +	if (cpu_has_veic)
> +		clear_c0_status(ST0_IM);
> +
>   	arch_init_irq();
>   }
>   
Hi Paul

Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web