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| author | Vineet Gupta <vgupta@synopsys.com> | 2017-02-01 18:44:33 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-02-06 18:37:57 +0100 |
| commit | 179cf194e6d153fb6daeca811253502d5c84e4c8 (patch) | |
| tree | c6bbe60670787391e3c79264ea4f00b920f20fb4 /arch/arc | |
| parent | ARCv2: intc: Rework the build time irq count information (diff) | |
| download | linux-179cf194e6d153fb6daeca811253502d5c84e4c8.tar.xz linux-179cf194e6d153fb6daeca811253502d5c84e4c8.zip | |
ARCv2: intc: Use runtime value of irq count for setting up intc
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/irq.h | 1 | ||||
| -rw-r--r-- | arch/arc/kernel/intc-arcv2.c | 28 |
2 files changed, 18 insertions, 11 deletions
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h index a3880b423925..0618b1ce707c 100644 --- a/arch/arc/include/asm/irq.h +++ b/arch/arc/include/asm/irq.h @@ -21,6 +21,7 @@ #ifdef CONFIG_ISA_ARCV2 #define IPI_IRQ 19 #define SOFTIRQ_IRQ 21 +#define FIRST_EXT_IRQ 24 #endif #include <linux/interrupt.h> diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c index 5c5769dd8f5d..4d3166f9bbc9 100644 --- a/arch/arc/kernel/intc-arcv2.c +++ b/arch/arc/kernel/intc-arcv2.c @@ -14,7 +14,15 @@ #include <linux/irqchip.h> #include <asm/irq.h> -#define NR_CPU_IRQS 32 /* number of irq lines coming in */ +#define NR_EXCEPTIONS 16 + +struct bcr_irq_arcv2 { +#ifdef CONFIG_CPU_BIG_ENDIAN + unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8; +#else + unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3; +#endif +}; /* * Early Hardware specific Interrupt setup @@ -25,14 +33,7 @@ void arc_init_IRQ(void) { unsigned int tmp, irq_prio; - - struct irq_build { -#ifdef CONFIG_CPU_BIG_ENDIAN - unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8; -#else - unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3; -#endif - } irq_bcr; + struct bcr_irq_arcv2 irq_bcr; struct aux_irq_ctrl { #ifdef CONFIG_CPU_BIG_ENDIAN @@ -117,7 +118,7 @@ static int arcv2_irq_map(struct irq_domain *d, unsigned int irq, * core intc IRQs [16, 23]: * Statically assigned always private-per-core (Timers, WDT, IPI, PCT) */ - if (hw < 24) { + if (hw < FIRST_EXT_IRQ) { /* * A subsequent request_percpu_irq() fails if percpu_devid is * not set. That in turns sets NOAUTOEN, meaning each core needs @@ -142,11 +143,16 @@ static int __init init_onchip_IRQ(struct device_node *intc, struct device_node *parent) { struct irq_domain *root_domain; + struct bcr_irq_arcv2 irq_bcr; + unsigned int nr_cpu_irqs; + + READ_BCR(ARC_REG_IRQ_BCR, irq_bcr); + nr_cpu_irqs = irq_bcr.irqs + NR_EXCEPTIONS; if (parent) panic("DeviceTree incore intc not a root irq controller\n"); - root_domain = irq_domain_add_linear(intc, NR_CPU_IRQS, &arcv2_irq_ops, NULL); + root_domain = irq_domain_add_linear(intc, nr_cpu_irqs, &arcv2_irq_ops, NULL); if (!root_domain) panic("root irq domain not avail\n"); |