diff options
| author | Michal Simek <monstr@monstr.eu> | 2010-01-14 15:16:31 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-03-11 13:59:28 +0100 |
| commit | c6ba01a4c7806d134c8d483525997559071d0990 (patch) | |
| tree | 07fcff3b237903424d5c7e11497c575d6301e323 /arch/microblaze/include | |
| parent | a84642a339235020e6dccc022de27055f1fa9340 (diff) | |
microblaze: Add irq_create_{of_,}mapping functions
Support function for PCI. We don't use any advance mapping mechanism
that's why implementation is simple.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/irq.h | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h index 90f050535ebe..31a35c33df63 100644 --- a/arch/microblaze/include/asm/irq.h +++ b/arch/microblaze/include/asm/irq.h @@ -14,6 +14,12 @@ #include <linux/interrupt.h> +/* This type is the placeholder for a hardware interrupt number. It has to + * be big enough to enclose whatever representation is used by a given + * platform. + */ +typedef unsigned long irq_hw_number_t; + extern unsigned int nr_irq; #define NO_IRQ (-1) @@ -21,7 +27,8 @@ extern unsigned int nr_irq; struct pt_regs; extern void do_IRQ(struct pt_regs *regs); -/* irq_of_parse_and_map - Parse and Map an interrupt into linux virq space +/** + * irq_of_parse_and_map - Parse and Map an interrupt into linux virq space * @device: Device node of the device whose interrupt is to be mapped * @index: Index of the interrupt to map * @@ -40,4 +47,32 @@ static inline void irq_dispose_mapping(unsigned int virq) return; } +struct irq_host; + +/** + * irq_create_mapping - Map a hardware interrupt into linux virq space + * @host: host owning this hardware interrupt or NULL for default host + * @hwirq: hardware irq number in that host space + * + * Only one mapping per hardware interrupt is permitted. Returns a linux + * virq number. + * If the sense/trigger is to be specified, set_irq_type() should be called + * on the number returned from that call. + */ +extern unsigned int irq_create_mapping(struct irq_host *host, + irq_hw_number_t hwirq); + +/** + * irq_create_of_mapping - Map a hardware interrupt into linux virq space + * @controller: Device node of the interrupt controller + * @inspec: Interrupt specifier from the device-tree + * @intsize: Size of the interrupt specifier from the device-tree + * + * This function is identical to irq_create_mapping except that it takes + * as input informations straight from the device-tree (typically the results + * of the of_irq_map_*() functions. + */ +extern unsigned int irq_create_of_mapping(struct device_node *controller, + u32 *intspec, unsigned int intsize); + #endif /* _ASM_MICROBLAZE_IRQ_H */ |