#ifdef __KERNEL__ #ifndef _ASM_POWERPC_IRQ_H #define _ASM_POWERPC_IRQ_H /* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/threads.h> #include <linux/list.h> #include <linux/radix-tree.h> #include <asm/types.h> #include <asm/atomic.h> #define get_irq_desc(irq) (&irq_desc[(irq)]) /* Define a way to iterate across irqs. */ #define for_each_irq(i) \ for ((i) = 0; (i) < NR_IRQS; ++(i)) extern atomic_t ppc_n_lost_interrupts; #ifdef CONFIG_PPC_MERGE /* This number is used when no interrupt has been assigned */ #define NO_IRQ (0) /* This is a special irq number to return from get_irq() to tell that * no interrupt happened _and_ ignore it (don't count it as bad). Some * platforms like iSeries rely on that. */ #define NO_IRQ_IGNORE ((unsigned int)-1) /* Total number of virq in the platform (make it a CONFIG_* option ? */ #define NR_IRQS 512 /* Number of irqs reserved for the legacy controller */ #define NUM_ISA_INTERRUPTS 16 /* 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; /* Interrupt controller "host" data structure. This could be defined as a * irq domain controller. That is, it handles the mapping between hardware * and virtual interrupt numbers for a given interrupt domain. The host * structure is generally created by the PIC code for a given PIC instance * (though a host can cover more than one PIC if they have a flat number * model). It's the host 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 fairly agnostic to the fact that * 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 host->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. */ struct irq_host; struct radix_tree_root; /* Functions below are provided by the host and called whenever a new mapping * is created or an old mapping is disposed. The host can then proceed to * whatever internal data structures management is required. It also needs * to setup the irq_desc when returning from map(). */ struct irq_host_ops { /* Match an interrupt controller device node to a host, returns * 1 on a match */ int (*match)(struct irq_host *h, struct device_node *node); /* Create or update a mapping between a virtual irq number and a hw * irq number. This is called only once for a given mapping. */ int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); /* Dispose of such a mapping */ void (*unmap)(struct irq_host *h, unsigned int virq); /* Update of such a mapping */ void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); /* Translate device-tree interrupt specifier from raw format coming * from the firmware to a irq_hw_number_t (interrupt line number) and * type (sense) that can be passed to set_irq_type(). In the absence * of this callback, irq_create_of_mapping() and irq_of_parse_and_map() * will return the hw number in the first cell and IRQ_TYPE_NONE for * the type (which amount to keeping whatever default value the * interrupt controller has for that line) */ int (*xlate)(struct irq_host *h, struct device_node *ctrler, u32 *intspec, unsigned int intsize, irq_hw_number_t *out_hwirq, unsigned int *out_type); }; struct irq_host { struct list_head link; /* type of reverse mapping technique */ unsigned int revmap_type; #define IRQ_HOST_MAP_LEGACY 0 /* legacy 8259, gets irqs 1..15 */ #define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */ #define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */ #define IRQ_HOST_MAP_TREE 3 /* radix tree */ union { struct { unsigned int size; unsigned int *revmap; } linear; struct radix_tree_root tree; } revmap_data; struct irq_host_ops *ops; void *host_data; irq_hw_number_t inval_irq; /* Optional device node pointer */ struct device_node *of_node; }; /* The main irq map itself is an array of NR_IRQ entries containing the * associate host and irq number. An entry with a host of NULL is free. * An entry can be allocated if it's free, the allocator always then sets * hwirq first to the host's invalid irq number and then fills ops. */ struct irq_map_entry { irq_hw_number_t hwirq; struct irq_host *host; }; extern struct irq_map_entry irq_map[NR_IRQS]; extern irq_hw_number_t virq_to_hw(unsigned int virq); /** * irq_alloc_host - Allocate a new irq_host data structure * @of_node: optional device-tree node of the interrupt controller * @revmap_type: type of reverse mapping to use * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map * @ops: map/unmap host callbacks * @inval_irq: provide a hw number in that host space that is always invalid * * Allocates and initialize and irq_host structure. Note that in the case of * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns * for all legacy interrupts except 0 (which is always the invalid irq for * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated * later during boot automatically (the reverse mapping will use the slow path * until that happens). */ extern struct irq_host *irq_alloc_host(struct device_node *of_node, unsigned int revmap_type, unsigned int revmap_arg, struct irq_host_ops *ops, irq_hw_number_t inval_irq); /** * irq_find_host - Locates a host for a given device node * @node: device-tree node of the interrupt controller */ extern struct irq_host *irq_find_host(struct device_node *node); /** * irq_set_default_host - Set a "default" host * @host: default host pointer * * For convenience, it's possible to set a "default" host that will be used * whenever NULL is passed to irq_create_mapping(). It makes life easier for * platforms that want to manipulate a few hard coded interrupt numbers that * aren't properly represented in the device-tree. */ extern void irq_set_default_host(struct irq_host *host); /** * irq_set_virq_count - Set the maximum number of virt irqs * @count: number of linux virtual irqs, capped with NR_IRQS * * This is mainly for use by platforms like iSeries who want to program * the virtual irq number in the controller to avoid the reverse mapping */ extern void irq_set_virq_count(unsigned int count); /** * 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_dispose_mapping - Unmap an interrupt * @virq: linux virq number of the interrupt to unmap */ extern void irq_dispose_mapping(unsigned int virq); /** * irq_find_mapping - Find a linux virq from an hw irq number. * @host: host owning this hardware interrupt * @hwirq: hardware irq number in that host space * * This is a slow path, for use by generic code. It's expected that an * irq controller implementation directly calls the appropriate low level * mapping function. */ 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. * @host: host owning this hardware interrupt * @hwirq: hardware irq number in that host space * * This is a fast path, for use by irq controller code that uses radix tree * revmaps */ extern unsigned int irq_radix_revmap(struct irq_host *host, irq_hw_number_t hwirq); /** * irq_linear_revmap - Find a linux virq from a hw irq number. * @host: host owning this hardware interrupt * @hwirq: hardware irq number in that host space * * This is a fast path, for use by irq controller code that uses linear * revmaps. It does fallback to the slow path if the revmap doesn't exist * yet and will create the revmap entry with appropriate locking */ extern unsigned int irq_linear_revmap(struct irq_host *host, irq_hw_number_t hwirq); /** * irq_alloc_virt - Allocate virtual irq numbers * @host: host owning these new virtual irqs * @count: number of consecutive numbers to allocate * @hint: pass a hint number, the allocator will try to use a 1:1 mapping * * This is a low level function that is used internally by irq_create_mapping() * and that can be used by some irq controllers implementations for things * like allocating ranges of numbers for MSIs. The revmaps are left untouched. */ extern unsigned int irq_alloc_virt(struct irq_host *host, unsigned int count, unsigned int hint); /** * irq_free_virt - Free virtual irq numbers * @virq: virtual irq number of the first interrupt to free * @count: number of interrupts to free * * This function is the opposite of irq_alloc_virt. It will not clear reverse * maps, this should be done previously by unmap'ing the interrupt. In fact, * all interrupts covered by the range being freed should have been unmapped * prior to calling this. */ extern void irq_free_virt(unsigned int virq, unsigned int count); /* -- OF helpers -- */ /* 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); /* irq_of_parse_and_map - Parse nad 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 * * This function is a wrapper that chains of_irq_map_one() and * irq_create_of_mapping() to make things easier to callers */ extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index); /* -- End OF helpers -- */ /** * irq_early_init - Init irq remapping subsystem */ extern void irq_early_init(void); static __inline__ int irq_canonicalize(int irq) { return irq; } #else /* CONFIG_PPC_MERGE */ /* This number is used when no interrupt has been assigned */ #define NO_IRQ (-1) #define NO_IRQ_IGNORE (-2) /* * These constants are used for passing information about interrupt * signal polarity and level/edge sensing to the low-level PIC chip * drivers. */ #define IRQ_SENSE_MASK 0x1 #define IRQ_SENSE_LEVEL 0x1 /* interrupt on active level */ #define IRQ_SENSE_EDGE 0x0 /* interrupt triggered by edge */ #define IRQ_POLARITY_MASK 0x2 #define IRQ_POLARITY_POSITIVE 0x2 /* high level or low->high edge */ #define IRQ_POLARITY_NEGATIVE 0x0 /* low level or high->low edge */ #if defined(CONFIG_40x) #include <asm/ibm4xx.h> #ifndef NR_BOARD_IRQS #define NR_BOARD_IRQS 0 #endif #ifndef UIC_WIDTH /* Number of interrupts per device */ #define UIC_WIDTH 32 #endif #ifndef NR_UICS /* number of UIC devices */ #define NR_UICS 1 #endif #if defined (CONFIG_403) /* * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has * 32 possible interrupts, a majority of which are not implemented on * all cores. There are six configurable, external interrupt pins and * there are eight internal interrupts for the on-chip serial port * (SPU), DMA controller, and JTAG controller. * */ #define NR_AIC_IRQS 32 #define NR_IRQS (NR_AIC_IRQS + NR_BOARD_IRQS) #elif !defined (CONFIG_403) /* * The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32 * possible interrupts as well. There are seven, configurable external * interrupt pins and there are 17 internal interrupts for the on-chip * serial port, DMA controller, on-chip Ethernet controller, PCI, etc. * */ #define NR_UIC_IRQS UIC_WIDTH #define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS) #endif #elif defined(CONFIG_44x) #include <asm/ibm44x.h> #define NR_UIC_IRQS 32 #define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS) #elif defined(CONFIG_8xx) /* Now include the board configuration specific associations. */ #include <asm/mpc8xx.h> /* The MPC8xx cores have 16 possible interrupts. There are eight * possible level sensitive interrupts assigned and generated internally * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer. * There are eight external interrupts (IRQs) that can be configured * as either level or edge sensitive. * * On some implementations, there is also the possibility of an 8259 * through the PCI and PCI-ISA bridges. * * We are "flattening" the interrupt vectors of the cascaded CPM * and 8259 interrupt controllers so that we can uniquely identify * any interrupt source with a single integer. */ #define NR_SIU_INTS 16 #define NR_CPM_INTS 32 #ifndef NR_8259_INTS #define NR_8259_INTS 0 #endif #define SIU_IRQ_OFFSET 0 #define CPM_IRQ_OFFSET (SIU_IRQ_OFFSET + NR_SIU_INTS) #define I8259_IRQ_OFFSET (CPM_IRQ_OFFSET + NR_CPM_INTS) #define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS) /* These values must be zero-based and map 1:1 with the SIU configuration. * They are used throughout the 8xx I/O subsystem to generate * interrupt masks, flags, and other control patterns. This is why the * current kernel assumption of the 8259 as the base controller is such * a pain in the butt. */ #define SIU_IRQ0 (0) /* Highest priority */ #define SIU_LEVEL0 (1) #define SIU_IRQ1 (2) #define SIU_LEVEL1 (3) #define SIU_IRQ2 (4) #define SIU_LEVEL2 (5) #define SIU_IRQ3 (6) #define SIU_LEVEL3 (7) #define SIU_IRQ4 (8) #define SIU_LEVEL4 (9) #define SIU_IRQ5 (10) #define SIU_LEVEL5 (11) #define SIU_IRQ6 (12) #define SIU_LEVEL6 (13) #define SIU_IRQ7 (14) #define SIU_LEVEL7 (15) #define MPC8xx_INT_FEC1 SIU_LEVEL1 #define MPC8xx_INT_FEC2 SIU_LEVEL3 #define MPC8xx_INT_SCC1 (CPM_IRQ_OFFSET + CPMVEC_SCC1) #define MPC8xx_INT_SCC2 (CPM_IRQ_OFFSET + CPMVEC_SCC2) #define MPC8xx_INT_SCC3 (CPM_IRQ_OFFSET + CPMVEC_SCC3) #define MPC8xx_INT_SCC4 (CPM_IRQ_OFFSET + CPMVEC_SCC4) #define MPC8xx_INT_SMC1 (CPM_IRQ_OFFSET + CPMVEC_SMC1) #define MPC8xx_INT_SMC2 (CPM_IRQ_OFFSET + CPMVEC_SMC2) /* The internal interrupts we can configure as we see fit. * My personal preference is CPM at level 2, which puts it above the * MBX PCI/ISA/IDE interrupts. */ #ifndef PIT_INTERRUPT #define PIT_INTERRUPT SIU_LEVEL0 #endif #ifndef CPM_INTERRUPT #define CPM_INTERRUPT SIU_LEVEL2 #endif #ifndef PCMCIA_INTERRUPT #define PCMCIA_INTERRUPT SIU_LEVEL6 #endif #ifndef DEC_INTERRUPT #define DEC_INTERRUPT SIU_LEVEL7 #endif /* Some internal interrupt registers use an 8-bit mask for the interrupt * level instead of a number. */ #define mk_int_int_mask(IL) (1 << (7 - (IL/2))) #else /* CONFIG_40x + CONFIG_8xx */ /* * this is the # irq's for all ppc arch's (pmac/chrp/prep) * so it is the max of them all */ #define NR_IRQS 256 #define __DO_IRQ_CANON 1 #ifndef CONFIG_8260 #define NUM_8259_INTERRUPTS 16 #else /* CONFIG_8260 */ /* The 8260 has an internal interrupt controller with a maximum of * 64 IRQs. We will use NR_IRQs from above since it is large enough. * Don't be confused by the 8260 documentation where they list an * "interrupt number" and "interrupt vector". We are only interested * in the interrupt vector. There are "reserved" holes where the * vector number increases, but the interrupt number in the table does not. * (Document errata updates have fixed this...make sure you have up to * date processor documentation -- Dan). */ #ifndef CPM_IRQ_OFFSET #define CPM_IRQ_OFFSET 0 #endif #define NR_CPM_INTS 64 #define SIU_INT_ERROR ((uint)0x00 + CPM_IRQ_OFFSET) #define SIU_INT_I2C ((uint)0x01 + CPM_IRQ_OFFSET) #define SIU_INT_SPI ((uint)0x02 + CPM_IRQ_OFFSET) #define SIU_INT_RISC ((uint)0x03 + CPM_IRQ_OFFSET) #define SIU_INT_SMC1 ((uint)0x04 + CPM_IRQ_OFFSET) #define SIU_INT_SMC2 ((uint)0x05 + CPM_IRQ_OFFSET) #define SIU_INT_IDMA1 ((uint)0x06 + CPM_IRQ_OFFSET) #define SIU_INT_IDMA2 ((uint)0x07 + CPM_IRQ_OFFSET) #define SIU_INT_IDMA3 ((uint)0x08 + CPM_IRQ_OFFSET) #define SIU_INT_IDMA4 ((uint)0x09 + CPM_IRQ_OFFSET) #define SIU_INT_SDMA ((uint)0x0a + CPM_IRQ_OFFSET) #define SIU_INT_USB ((uint)0x0b + CPM_IRQ_OFFSET) #define SIU_INT_TIMER1 ((uint)0x0c + CPM_IRQ_OFFSET) #define SIU_INT_TIMER2 ((uint)0x0d + CPM_IRQ_OFFSET) #define SIU_INT_TIMER3 ((uint)0x0e + CPM_IRQ_OFFSET) #define SIU_INT_TIMER4 ((uint)0x0f + CPM_IRQ_OFFSET) #define SIU_INT_TMCNT ((uint)0x10 + CPM_IRQ_OFFSET) #define SIU_INT_PIT ((uint)0x11 + CPM_IRQ_OFFSET) #define SIU_INT_PCI ((uint)0x12 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ1 ((uint)0x13 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ2 ((uint)0x14 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ3 ((uint)0x15 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ4 ((uint)0x16 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ5 ((uint)0x17 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ6 ((uint)0x18 + CPM_IRQ_OFFSET) #define SIU_INT_IRQ7 ((uint)0x19 + CPM_IRQ_OFFSET) #define SIU_INT_FCC1 ((uint)0x20 + CPM_IRQ_OFFSET) #define SIU_INT_FCC2 ((uint)0x21 + CPM_IRQ_OFFSET) #define SIU_INT_FCC3 ((uint)0x22 + CPM_IRQ_OFFSET) #define SIU_INT_MCC1 ((uint)0x24 + CPM_IRQ_OFFSET) #define SIU_INT_MCC2 ((uint)0x25 + CPM_IRQ_OFFSET) #define SIU_INT_SCC1 ((uint)0x28 + CPM_IRQ_OFFSET) #define SIU_INT_SCC2 ((uint)0x29 + CPM_IRQ_OFFSET) #define SIU_INT_SCC3 ((uint)0x2a + CPM_IRQ_OFFSET) #define SIU_INT_SCC4 ((uint)0x2b + CPM_IRQ_OFFSET) #define SIU_INT_PC15 ((uint)0x30 + CPM_IRQ_OFFSET) #define SIU_INT_PC14 ((uint)0x31 + CPM_IRQ_OFFSET) #define SIU_INT_PC13 ((uint)0x32 + CPM_IRQ_OFFSET) #define SIU_INT_PC12 ((uint)0x33 + CPM_IRQ_OFFSET) #define SIU_INT_PC11 ((uint)0x34 + CPM_IRQ_OFFSET) #define SIU_INT_PC10 ((uint)0x35 + CPM_IRQ_OFFSET) #define SIU_INT_PC9 ((uint)0x36 + CPM_IRQ_OFFSET) #define SIU_INT_PC8 ((uint)0x37 + CPM_IRQ_OFFSET) #define SIU_INT_PC7 ((uint)0x38 + CPM_IRQ_OFFSET) #define SIU_INT_PC6 ((uint)0x39 + CPM_IRQ_OFFSET) #define SIU_INT_PC5 ((uint)0x3a + CPM_IRQ_OFFSET) #define SIU_INT_PC4 ((uint)0x3b + CPM_IRQ_OFFSET) #define SIU_INT_PC3 ((uint)0x3c + CPM_IRQ_OFFSET) #define SIU_INT_PC2 ((uint)0x3d + CPM_IRQ_OFFSET) #define SIU_INT_PC1 ((uint)0x3e + CPM_IRQ_OFFSET) #define SIU_INT_PC0 ((uint)0x3f + CPM_IRQ_OFFSET) #endif /* CONFIG_8260 */ #endif /* Whatever way too big #ifdef */ #define NR_MASK_WORDS ((NR_IRQS + 31) / 32) /* pedantic: these are long because they are used with set_bit --RR */ extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS]; /* * Because many systems have two overlapping names spaces for * interrupts (ISA and XICS for example), and the ISA interrupts * have historically not been easy to renumber, we allow ISA * interrupts to take values 0 - 15, and shift up the remaining * interrupts by 0x10. */ #define NUM_ISA_INTERRUPTS 0x10 extern int __irq_offset_value; static inline int irq_offset_up(int irq) { return(irq + __irq_offset_value); } static inline int irq_offset_down(int irq) { return(irq - __irq_offset_value); } static inline int irq_offset_value(void) { return __irq_offset_value; } #ifdef __DO_IRQ_CANON extern int ppc_do_canonicalize_irqs; #else #define ppc_do_canonicalize_irqs 0 #endif static __inline__ int irq_canonicalize(int irq) { if (ppc_do_canonicalize_irqs && irq == 2) irq = 9; return irq; } #endif /* CONFIG_PPC_MERGE */ extern int distribute_irqs; struct irqaction; struct pt_regs; #define __ARCH_HAS_DO_SOFTIRQ #ifdef CONFIG_IRQSTACKS /* * Per-cpu stacks for handling hard and soft interrupts. */ extern struct thread_info *hardirq_ctx[NR_CPUS]; extern struct thread_info *softirq_ctx[NR_CPUS]; extern void irq_ctx_init(void); extern void call_do_softirq(struct thread_info *tp); extern int call_handle_irq(int irq, void *p1, struct thread_info *tp, void *func); #else #define irq_ctx_init() #endif /* CONFIG_IRQSTACKS */ extern void do_IRQ(struct pt_regs *regs); #endif /* _ASM_IRQ_H */ #endif /* __KERNEL__ */