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| author |   Vineet Gupta <vgupta@synopsys.com> | 2014-06-25 17:16:04 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2014-07-23 11:17:55 +0530 |
| commit | 878f46c71e99cfb6d8e4e15a561db63a3c9601e5 (patch) | |
| tree | 5e41401f5aeb29f8253d7fd335ccc2464ea8b844 /arch | |
| parent | ARC: prune extra header includes from smp.c (diff) | |
| download | linux-dev-878f46c71e99cfb6d8e4e15a561db63a3c9601e5.tar.xz linux-dev-878f46c71e99cfb6d8e4e15a561db63a3c9601e5.zip | |
ARC: [intc] don't mask all IRQ by default
Hardware keeps them enabled on reset, and Linux needs to keep status quo.
Any spurious interrupts will be reported/blocked by genirq.
This helps remove a SMP IRQ quirk (next commit), where a peripheral IRQ
is hard wired to core0, and request_irq()->unmask() happens on core1,
keeping the IRQ masked on core0, needing an explicit unmask.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/kernel/irq.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c index 835fa5e71b62..02ffc764c97a 100644 --- a/arch/arc/kernel/irq.c +++ b/arch/arc/kernel/irq.c @@ -19,21 +19,16 @@ /* * Early Hardware specific Interrupt setup + * -Platform independent, needed for each CPU (not foldable into init_IRQ) * -Called very early (start_kernel -> setup_arch -> setup_processor) - * -Platform Independent (must for any ARC700) - * -Needed for each CPU (hence not foldable into init_IRQ) * * what it does ? - * -Disable all IRQs (on CPU side) * -Optionally, setup the High priority Interrupts as Level 2 IRQs */ void arc_init_IRQ(void) { int level_mask = 0; - /* Disable all IRQs: enable them as devices request */ - write_aux_reg(AUX_IENABLE, 0); - /* setup any high priority Interrupts (Level2 in ARCompact jargon) */ level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3; level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5; |