irq.h
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上传日期:2013-04-10
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- /* $Id: irq.h,v 1.32 2000/08/26 02:42:28 anton Exp $
- * irq.h: IRQ registers on the Sparc.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef _SPARC_IRQ_H
- #define _SPARC_IRQ_H
- #include <linux/config.h>
- #include <linux/linkage.h>
- #include <linux/threads.h> /* For NR_CPUS */
- #include <asm/system.h> /* For SUN4M_NCPUS */
- #include <asm/btfixup.h>
- #define __irq_ino(irq) irq
- #define __irq_pil(irq) irq
- BTFIXUPDEF_CALL(char *, __irq_itoa, unsigned int)
- #define __irq_itoa(irq) BTFIXUP_CALL(__irq_itoa)(irq)
- #define NR_IRQS 15
- /* Dave Redman (djhr@tadpole.co.uk)
- * changed these to function pointers.. it saves cycles and will allow
- * the irq dependencies to be split into different files at a later date
- * sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
- * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- * Changed these to btfixup entities... It saves cycles :)
- */
- BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
- BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
- BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
- BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
- BTFIXUPDEF_CALL(void, clear_clock_irq, void)
- BTFIXUPDEF_CALL(void, clear_profile_irq, int)
- BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
- #define disable_irq_nosync disable_irq
- #define disable_irq(irq) BTFIXUP_CALL(disable_irq)(irq)
- #define enable_irq(irq) BTFIXUP_CALL(enable_irq)(irq)
- #define disable_pil_irq(irq) BTFIXUP_CALL(disable_pil_irq)(irq)
- #define enable_pil_irq(irq) BTFIXUP_CALL(enable_pil_irq)(irq)
- #define clear_clock_irq() BTFIXUP_CALL(clear_clock_irq)()
- #define clear_profile_irq(cpu) BTFIXUP_CALL(clear_profile_irq)(cpu)
- #define load_profile_irq(cpu,limit) BTFIXUP_CALL(load_profile_irq)(cpu,limit)
- extern void (*init_timers)(void (*lvl10_irq)(int, void *, struct pt_regs *));
- extern void claim_ticker14(void (*irq_handler)(int, void *, struct pt_regs *),
- int irq,
- unsigned int timeout);
- #ifdef CONFIG_SMP
- BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
- BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
- BTFIXUPDEF_CALL(void, set_irq_udt, int)
- #define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
- #define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
- #define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
- #endif
- extern int request_fast_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, __const__ char *devname);
- /* On the sun4m, just like the timers, we have both per-cpu and master
- * interrupt registers.
- */
- /* These registers are used for sending/receiving irqs from/to
- * different cpu's.
- */
- struct sun4m_intreg_percpu {
- unsigned int tbt; /* Interrupts still pending for this cpu. */
- /* These next two registers are WRITE-ONLY and are only
- * "on bit" sensitive, "off bits" written have NO affect.
- */
- unsigned int clear; /* Clear this cpus irqs here. */
- unsigned int set; /* Set this cpus irqs here. */
- unsigned char space[PAGE_SIZE - 12];
- };
- /*
- * djhr
- * Actually the clear and set fields in this struct are misleading..
- * according to the SLAVIO manual (and the same applies for the SEC)
- * the clear field clears bits in the mask which will ENABLE that IRQ
- * the set field sets bits in the mask to DISABLE the IRQ.
- *
- * Also the undirected_xx address in the SLAVIO is defined as
- * RESERVED and write only..
- *
- * DAVEM_NOTE: The SLAVIO only specifies behavior on uniprocessor
- * sun4m machines, for MP the layout makes more sense.
- */
- struct sun4m_intregs {
- struct sun4m_intreg_percpu cpu_intregs[SUN4M_NCPUS];
- unsigned int tbt; /* IRQ's that are still pending. */
- unsigned int irqs; /* Master IRQ bits. */
- /* Again, like the above, two these registers are WRITE-ONLY. */
- unsigned int clear; /* Clear master IRQ's by setting bits here. */
- unsigned int set; /* Set master IRQ's by setting bits here. */
- /* This register is both READ and WRITE. */
- unsigned int undirected_target; /* Which cpu gets undirected irqs. */
- };
- extern struct sun4m_intregs *sun4m_interrupts;
- /*
- * Bit field defines for the interrupt registers on various
- * Sparc machines.
- */
- /* The sun4c interrupt register. */
- #define SUN4C_INT_ENABLE 0x01 /* Allow interrupts. */
- #define SUN4C_INT_E14 0x80 /* Enable level 14 IRQ. */
- #define SUN4C_INT_E10 0x20 /* Enable level 10 IRQ. */
- #define SUN4C_INT_E8 0x10 /* Enable level 8 IRQ. */
- #define SUN4C_INT_E6 0x08 /* Enable level 6 IRQ. */
- #define SUN4C_INT_E4 0x04 /* Enable level 4 IRQ. */
- #define SUN4C_INT_E1 0x02 /* Enable level 1 IRQ. */
- /* Dave Redman (djhr@tadpole.co.uk)
- * The sun4m interrupt registers.
- */
- #define SUN4M_INT_ENABLE 0x80000000
- #define SUN4M_INT_E14 0x00000080
- #define SUN4M_INT_E10 0x00080000
- #define SUN4M_HARD_INT(x) (0x000000001 << (x))
- #define SUN4M_SOFT_INT(x) (0x000010000 << (x))
- #define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
- #define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
- #define SUN4M_INT_M2S_WRITE 0x20000000 /* write buffer error */
- #define SUN4M_INT_ECC 0x10000000 /* ecc memory error */
- #define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
- #define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
- #define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
- #define SUN4M_INT_REALTIME 0x00080000 /* system timer */
- #define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
- #define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
- #define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
- #define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
- #define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
- #define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
- #define SUN4M_INT_SBUS(x) (1 << (x+7))
- #define SUN4M_INT_VME(x) (1 << (x))
- #endif