irq.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- /*
- * BK Id: SCCS/s.irq.h 1.9 05/17/01 18:14:24 cort
- */
- #ifdef __KERNEL__
- #ifndef _ASM_IRQ_H
- #define _ASM_IRQ_H
- #include <linux/config.h>
- #include <asm/machdep.h> /* ppc_md */
- #include <asm/atomic.h>
- extern void disable_irq(unsigned int);
- extern void disable_irq_nosync(unsigned int);
- extern void enable_irq(unsigned int);
- #if defined(CONFIG_4xx)
- /*
- * 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.
- *
- * 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_IRQS 32
- #define AIC_INT0 (0)
- #define AIC_INT4 (4)
- #define AIC_INT5 (5)
- #define AIC_INT6 (6)
- #define AIC_INT7 (7)
- #define AIC_INT8 (8)
- #define AIC_INT9 (9)
- #define AIC_INT10 (10)
- #define AIC_INT11 (11)
- #define AIC_INT27 (27)
- #define AIC_INT28 (28)
- #define AIC_INT29 (29)
- #define AIC_INT30 (30)
- #define AIC_INT31 (31)
- static __inline__ int
- irq_cannonicalize(int irq)
- {
- return (irq);
- }
- #elif defined(CONFIG_8xx)
- /* 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.
- */
- #define NR_SIU_INTS 16
- #define NR_IRQS (NR_SIU_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)
- /* Now include the board configuration specific associations.
- */
- #include <asm/mpc8xx.h>
- /* 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)))
- /* always the same on 8xx -- Cort */
- static __inline__ int irq_cannonicalize(int irq)
- {
- return irq;
- }
- #else /* CONFIG_4xx + CONFIG_8xx */
- #if defined(CONFIG_APUS)
- /*
- * This structure is used to chain together the ISRs for a particular
- * interrupt source (if it supports chaining).
- */
- typedef struct irq_node {
- void (*handler)(int, void *, struct pt_regs *);
- unsigned long flags;
- void *dev_id;
- const char *devname;
- struct irq_node *next;
- } irq_node_t;
- /*
- * This structure has only 4 elements for speed reasons
- */
- typedef struct irq_handler {
- void (*handler)(int, void *, struct pt_regs *);
- unsigned long flags;
- void *dev_id;
- const char *devname;
- } irq_handler_t;
- /* count of spurious interrupts */
- extern volatile unsigned int num_spurious;
- extern int sys_request_irq(unsigned int,
- void (*)(int, void *, struct pt_regs *),
- unsigned long, const char *, void *);
- extern void sys_free_irq(unsigned int, void *);
- /*
- * This function returns a new irq_node_t
- */
- extern irq_node_t *new_irq_node(void);
- /* Number of m68k interrupts */
- #define SYS_IRQS 8
- #endif /* CONFIG_APUS */
- /*
- * 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
- #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).
- */
- #define NR_SIU_INTS 64
- /* There are many more than these, we will add them as we need them.
- */
- #define SIU_INT_SMC1 ((uint)0x04)
- #define SIU_INT_SMC2 ((uint)0x05)
- #define SIU_INT_FCC1 ((uint)0x20)
- #define SIU_INT_FCC2 ((uint)0x21)
- #define SIU_INT_FCC3 ((uint)0x22)
- #define SIU_INT_SCC1 ((uint)0x28)
- #define SIU_INT_SCC2 ((uint)0x29)
- #define SIU_INT_SCC3 ((uint)0x2a)
- #define SIU_INT_SCC4 ((uint)0x2b)
- #endif /* CONFIG_8260 */
- /*
- * This gets called from serial.c, which is now used on
- * powermacs as well as prep/chrp boxes.
- * Prep and chrp both have cascaded 8259 PICs.
- */
- static __inline__ int irq_cannonicalize(int irq)
- {
- if (ppc_md.irq_cannonicalize)
- {
- return ppc_md.irq_cannonicalize(irq);
- }
- else
- {
- return irq;
- }
- }
- #endif
- #define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
- /* pendatic: these are long because they are used with set_bit --RR */
- extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
- extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
- extern atomic_t ppc_n_lost_interrupts;
- #endif /* _ASM_IRQ_H */
- #endif /* __KERNEL__ */