diff options
Diffstat (limited to 'arch/arc/kernel/intc-arcv2.c')
| -rw-r--r-- | arch/arc/kernel/intc-arcv2.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c index 4d3166f9bbc9..f928795fd07a 100644 --- a/arch/arc/kernel/intc-arcv2.c +++ b/arch/arc/kernel/intc-arcv2.c @@ -32,7 +32,7 @@ struct bcr_irq_arcv2 { */ void arc_init_IRQ(void) { - unsigned int tmp, irq_prio; + unsigned int tmp, irq_prio, i; struct bcr_irq_arcv2 irq_bcr; struct aux_irq_ctrl { @@ -71,6 +71,16 @@ void arc_init_IRQ(void) irq_prio + 1, ARCV2_IRQ_DEF_PRIO, irq_bcr.firq ? " FIRQ (not used)":""); + /* + * Set a default priority for all available interrupts to prevent + * switching of register banks if Fast IRQ and multiple register banks + * are supported by CPU. + */ + for (i = NR_EXCEPTIONS; i < irq_bcr.irqs + NR_EXCEPTIONS; i++) { + write_aux_reg(AUX_IRQ_SELECT, i); + write_aux_reg(AUX_IRQ_PRIORITY, ARCV2_IRQ_DEF_PRIO); + } + /* setup status32, don't enable intr yet as kernel doesn't want */ tmp = read_aux_reg(ARC_REG_STATUS32); tmp |= STATUS_AD_MASK | (ARCV2_IRQ_DEF_PRIO << 1); |