diff options
Diffstat (limited to 'arch/arm/mach-mvebu/irq-armada-370-xp.c')
| -rw-r--r-- | arch/arm/mach-mvebu/irq-armada-370-xp.c | 96 |
1 files changed, 90 insertions, 6 deletions
diff --git a/arch/arm/mach-mvebu/irq-armada-370-xp.c b/arch/arm/mach-mvebu/irq-armada-370-xp.c index 5f5f9394b6b..8e3fb082c3c 100644 --- a/arch/arm/mach-mvebu/irq-armada-370-xp.c +++ b/arch/arm/mach-mvebu/irq-armada-370-xp.c @@ -24,6 +24,8 @@ #include <linux/irqdomain.h> #include <asm/mach/arch.h> #include <asm/exception.h> +#include <asm/smp_plat.h> +#include <asm/hardware/cache-l2x0.h> /* Interrupt Controller Registers Map */ #define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48) @@ -35,6 +37,12 @@ #define ARMADA_370_XP_CPU_INTACK_OFFS (0x44) +#define ARMADA_370_XP_SW_TRIG_INT_OFFS (0x4) +#define ARMADA_370_XP_IN_DRBEL_MSK_OFFS (0xc) +#define ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS (0x8) + +#define ACTIVE_DOORBELLS (8) + static void __iomem *per_cpu_int_base; static void __iomem *main_int_base; static struct irq_domain *armada_370_xp_mpic_domain; @@ -51,11 +59,22 @@ static void armada_370_xp_irq_unmask(struct irq_data *d) per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); } +#ifdef CONFIG_SMP +static int armada_xp_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, bool force) +{ + return 0; +} +#endif + static struct irq_chip armada_370_xp_irq_chip = { .name = "armada_370_xp_irq", .irq_mask = armada_370_xp_irq_mask, .irq_mask_ack = armada_370_xp_irq_mask, .irq_unmask = armada_370_xp_irq_unmask, +#ifdef CONFIG_SMP + .irq_set_affinity = armada_xp_set_affinity, +#endif }; static int armada_370_xp_mpic_irq_map(struct irq_domain *h, @@ -72,6 +91,41 @@ static int armada_370_xp_mpic_irq_map(struct irq_domain *h, return 0; } +#ifdef CONFIG_SMP +void armada_mpic_send_doorbell(const struct cpumask *mask, unsigned int irq) +{ + int cpu; + unsigned long map = 0; + + /* Convert our logical CPU mask into a physical one. */ + for_each_cpu(cpu, mask) + map |= 1 << cpu_logical_map(cpu); + + /* + * Ensure that stores to Normal memory are visible to the + * other CPUs before issuing the IPI. + */ + dsb(); + + /* submit softirq */ + writel((map << 8) | irq, main_int_base + + ARMADA_370_XP_SW_TRIG_INT_OFFS); +} + +void armada_xp_mpic_smp_cpu_init(void) +{ + /* Clear pending IPIs */ + writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); + + /* Enable first 8 IPIs */ + writel((1 << ACTIVE_DOORBELLS) - 1, per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_MSK_OFFS); + + /* Unmask IPI interrupt */ + writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); +} +#endif /* CONFIG_SMP */ + static struct irq_domain_ops armada_370_xp_mpic_irq_ops = { .map = armada_370_xp_mpic_irq_map, .xlate = irq_domain_xlate_onecell, @@ -91,13 +145,18 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node, control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL); armada_370_xp_mpic_domain = - irq_domain_add_linear(node, (control >> 2) & 0x3ff, - &armada_370_xp_mpic_irq_ops, NULL); + irq_domain_add_linear(node, (control >> 2) & 0x3ff, + &armada_370_xp_mpic_irq_ops, NULL); if (!armada_370_xp_mpic_domain) panic("Unable to add Armada_370_Xp MPIC irq domain (DT)\n"); irq_set_default_host(armada_370_xp_mpic_domain); + +#ifdef CONFIG_SMP + armada_xp_mpic_smp_cpu_init(); +#endif + return 0; } @@ -111,14 +170,36 @@ asmlinkage void __exception_irq_entry armada_370_xp_handle_irq(struct pt_regs ARMADA_370_XP_CPU_INTACK_OFFS); irqnr = irqstat & 0x3FF; - if (irqnr < 1023) { - irqnr = - irq_find_mapping(armada_370_xp_mpic_domain, irqnr); + if (irqnr > 1022) + break; + + if (irqnr >= 8) { + irqnr = irq_find_mapping(armada_370_xp_mpic_domain, + irqnr); handle_IRQ(irqnr, regs); continue; } +#ifdef CONFIG_SMP + /* IPI Handling */ + if (irqnr == 0) { + u32 ipimask, ipinr; + + ipimask = readl_relaxed(per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) + & 0xFF; + + writel(0x0, per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); + + /* Handle all pending doorbells */ + for (ipinr = 0; ipinr < ACTIVE_DOORBELLS; ipinr++) { + if (ipimask & (0x1 << ipinr)) + handle_IPI(ipinr, regs); + } + continue; + } +#endif - break; } while (1); } @@ -130,4 +211,7 @@ static const struct of_device_id mpic_of_match[] __initconst = { void __init armada_370_xp_init_irq(void) { of_irq_init(mpic_of_match); +#ifdef CONFIG_CACHE_L2X0 + l2x0_of_init(0, ~0UL); +#endif } |