diff options
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 24 | ||||
| -rw-r--r-- | include/asm-powerpc/irq.h | 9 |
2 files changed, 33 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index d806b18d9ff9..a3351561d283 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -616,6 +616,30 @@ static int irq_setup_virq(struct irq_host *host, unsigned int virq, return 0; } +unsigned int irq_create_direct_mapping(struct irq_host *host) +{ + unsigned int virq; + + if (host == NULL) + host = irq_default_host; + + BUG_ON(host == NULL); + WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP); + + virq = irq_alloc_virt(host, 1, 0); + if (virq == NO_IRQ) { + pr_debug("irq: create_direct virq allocation failed\n"); + return NO_IRQ; + } + + pr_debug("irq: create_direct obtained virq %d\n", virq); + + if (irq_setup_virq(host, virq, virq)) + return NO_IRQ; + + return virq; +} + unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq) { diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h index 05dd5a3eb3aa..0485c53db2b5 100644 --- a/include/asm-powerpc/irq.h +++ b/include/asm-powerpc/irq.h @@ -223,6 +223,15 @@ extern void irq_dispose_mapping(unsigned int virq); extern unsigned int irq_find_mapping(struct irq_host *host, irq_hw_number_t hwirq); +/** + * irq_create_direct_mapping - Allocate a virq for direct mapping + * @host: host to allocate the virq for or NULL for default host + * + * This routine is used for irq controllers which can choose the hardware + * interrupt numbers they generate. In such a case it's simplest to use + * the linux virq as the hardware interrupt number. + */ +extern unsigned int irq_create_direct_mapping(struct irq_host *host); /** * irq_radix_revmap - Find a linux virq from a hw irq number. |