[PATCH v2 01/16] MIPS: Provide a generic plat_irq_dispatch
From: Andrew Bresticker <hidden>
Date: 2014-09-05 17:30:35
Also in:
linux-mips, lkml
Subsystem:
mips, the rest · Maintainers:
Thomas Bogendoerfer, Linus Torvalds
For platforms which boot with device-tree and use the MIPS CPU interrupt controller binding, a generic plat_irq_dispatch() can be used since all CPU interrupts should be mapped through the CPU IRQ domain. Implement a plat_irq_dispatch() which simply handles the highest pending interrupt. Signed-off-by: Andrew Bresticker <redacted> Tested-by: Jonas Gorski <redacted> --- No changes from v1. --- arch/mips/kernel/irq_cpu.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-)
diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
index e498f2b..9cf8459 100644
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c@@ -116,6 +116,24 @@ void __init mips_cpu_irq_init(void) } #ifdef CONFIG_IRQ_DOMAIN +static struct irq_domain *mips_intc_domain; + +asmlinkage void __weak plat_irq_dispatch(void) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + unsigned int hw; + int irq; + + if (!pending) { + spurious_interrupt(); + return; + } + + hw = fls(pending) - CAUSEB_IP - 1; + irq = irq_linear_revmap(mips_intc_domain, hw); + do_IRQ(irq); +} + static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) {
@@ -141,15 +159,15 @@ static const struct irq_domain_ops mips_cpu_intc_irq_domain_ops = { int __init mips_cpu_intc_init(struct device_node *of_node, struct device_node *parent) { - struct irq_domain *domain; - /* Mask interrupts. */ clear_c0_status(ST0_IM); clear_c0_cause(CAUSEF_IP); - domain = irq_domain_add_legacy(of_node, 8, MIPS_CPU_IRQ_BASE, 0, - &mips_cpu_intc_irq_domain_ops, NULL); - if (!domain) + mips_intc_domain = irq_domain_add_legacy(of_node, 8, + MIPS_CPU_IRQ_BASE, 0, + &mips_cpu_intc_irq_domain_ops, + NULL); + if (!mips_intc_domain) panic("Failed to add irqdomain for MIPS CPU"); return 0;
--
2.1.0.rc2.206.gedb03e5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html