/* $Id: irq.h,v 1.28 2000/01/22 06:06:58 zaitcev 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 #include #include /* For NR_CPUS */ #include /* For SUN4M_NCPUS */ #include #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 /* IRQ handler dispatch entry and exit. */ #ifdef CONFIG_SMP extern unsigned int local_irq_count[NR_CPUS]; #define irq_enter(cpu, irq) \ do { hardirq_enter(cpu); \ spin_unlock_wait(&global_irq_lock); \ } while(0) #define irq_exit(cpu, irq) hardirq_exit(cpu) #else extern unsigned int local_irq_count; #define irq_enter(cpu, irq) (local_irq_count++) #define irq_exit(cpu, irq) (local_irq_count--) #endif /* 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