From 502c091054445f5a34a5994cb6880e0cb1f9014e Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 5 Jul 2011 23:42:28 -0600 Subject: irq: add irq_domain translation infrastructure This patch adds irq_domain infrastructure for translating from hardware irq numbers to linux irqs. This is particularly important for architectures adding device tree support because the current implementation (excluding PowerPC and SPARC) cannot handle translation for more than a single interrupt controller. irq_domain supports device tree translation for any number of interrupt controllers. This patch converts x86, Microblaze, ARM and MIPS to use irq_domain for device tree irq translation. x86 is untested beyond compiling it, irq_domain is enabled for MIPS and Microblaze, but the old behaviour is preserved until the core code is modified to actually register an irq_domain yet. On ARM it works and is required for much of the new ARM device tree board support. PowerPC has /not/ been converted to use this new infrastructure. It is still missing some features before it can replace the virq infrastructure already in powerpc (see documentation on irq_domain_map/unmap for details). Followup patches will add the missing pieces and migrate PowerPC to use irq_domain. SPARC has its own method of managing interrupts from the device tree and is unaffected by this change. Acked-by: Ralf Baechle Signed-off-by: Grant Likely --- arch/powerpc/include/asm/irq.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include/asm/irq.h') diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h index 1bff591f7f7..66bf09e21cb 100644 --- a/arch/powerpc/include/asm/irq.h +++ b/arch/powerpc/include/asm/irq.h @@ -45,6 +45,7 @@ extern atomic_t ppc_n_lost_interrupts; * be big enough to enclose whatever representation is used by a given * platform. */ +#define _IRQ_HW_NUMBER_T typedef unsigned long irq_hw_number_t; /* Interrupt controller "host" data structure. This could be defined as a -- cgit v1.2.3