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author | Grant Likely <grant.likely@secretlab.ca> | 2012-02-16 01:37:49 -0700 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2012-02-16 01:37:49 -0700 |
commit | cc79ca691c292e9fd44f589c7940b9654e22f2f6 (patch) | |
tree | 4efe01e4f4a92f97dba326923e0a7a8af4b3bf87 /include/linux/irqdomain.h | |
parent | 6d9285b00f776eebe459a858ebf07b56c36c60d2 (diff) | |
download | linux-stable-cc79ca691c292e9fd44f589c7940b9654e22f2f6.tar.gz linux-stable-cc79ca691c292e9fd44f589c7940b9654e22f2f6.tar.bz2 linux-stable-cc79ca691c292e9fd44f589c7940b9654e22f2f6.zip |
irq_domain: Move irq_domain code from powerpc to kernel/irq
This patch only moves the code. It doesn't make any changes, and the
code is still only compiled for powerpc. Follow-on patches will generalize
the code for other architectures.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'include/linux/irqdomain.h')
-rw-r--r-- | include/linux/irqdomain.h | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 35b9ff382e45..18f4ab002d2e 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -16,6 +16,17 @@ * (though a domain can cover more than one PIC if they have a flat number * model). It's the domain callbacks that are responsible for setting the * irq_chip on a given irq_desc after it's been mapped. + * + * The host code and data structures are agnostic to whether or not + * we use an open firmware device-tree. We do have references to struct + * device_node in two places: in irq_find_host() to find the host matching + * a given interrupt controller node, and of course as an argument to its + * counterpart domain->ops->match() callback. However, those are treated as + * generic pointers by the core and the fact that it's actually a device-node + * pointer is purely a convention between callers and implementation. This + * code could thus be used on other architectures by replacing those two + * by some sort of arch-specific void * "token" used to identify interrupt + * controllers. */ #ifndef _LINUX_IRQDOMAIN_H @@ -108,6 +119,32 @@ struct irq_domain { }; #ifdef CONFIG_IRQ_DOMAIN +#ifdef CONFIG_PPC +extern struct irq_domain *irq_alloc_host(struct device_node *of_node, + unsigned int revmap_type, + unsigned int revmap_arg, + struct irq_domain_ops *ops, + irq_hw_number_t inval_irq); +extern struct irq_domain *irq_find_host(struct device_node *node); +extern void irq_set_default_host(struct irq_domain *host); +extern void irq_set_virq_count(unsigned int count); + + +extern unsigned int irq_create_mapping(struct irq_domain *host, + irq_hw_number_t hwirq); +extern void irq_dispose_mapping(unsigned int virq); +extern unsigned int irq_find_mapping(struct irq_domain *host, + irq_hw_number_t hwirq); +extern unsigned int irq_create_direct_mapping(struct irq_domain *host); +extern void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq, + irq_hw_number_t hwirq); +extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host, + irq_hw_number_t hwirq); +extern unsigned int irq_linear_revmap(struct irq_domain *host, + irq_hw_number_t hwirq); + +#else /* CONFIG_PPC */ + /** * irq_domain_to_irq() - Translate from a hardware irq to a linux irq number * @@ -137,15 +174,16 @@ extern void irq_domain_add(struct irq_domain *domain); extern void irq_domain_del(struct irq_domain *domain); extern struct irq_domain_ops irq_domain_simple_ops; -#endif /* CONFIG_IRQ_DOMAIN */ -#if defined(CONFIG_IRQ_DOMAIN) && defined(CONFIG_OF_IRQ) +#if defined(CONFIG_OF_IRQ) extern void irq_domain_add_simple(struct device_node *controller, int irq_base); extern void irq_domain_generate_simple(const struct of_device_id *match, u64 phys_base, unsigned int irq_start); -#else /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */ +#else /* CONFIG_OF_IRQ */ static inline void irq_domain_generate_simple(const struct of_device_id *match, u64 phys_base, unsigned int irq_start) { } -#endif /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */ +#endif /* !CONFIG_OF_IRQ */ +#endif /* !CONFIG_PPC */ +#endif /* CONFIG_IRQ_DOMAIN */ #endif /* _LINUX_IRQDOMAIN_H */ |