include/asm-sparc/irq.h

   1 /* $Id: irq.h,v 1.32 2000/08/26 02:42:28 anton Exp $
   2  * irq.h: IRQ registers on the Sparc.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC_IRQ_H
   8 #define _SPARC_IRQ_H
   9
  10 #include <linux/linkage.h>
  11 #include <linux/threads.h>     /* For NR_CPUS */
  12 #include <linux/interrupt.h>
  13
  14 #include <asm/system.h>     /* For SUN4M_NCPUS */
  15 #include <asm/btfixup.h>
  16
  17 #define __irq_ino(irq) irq
  18 #define __irq_pil(irq) irq
  19
  20 #define NR_IRQS    16
  21
  22 #define irq_canonicalize(irq)   (irq)
  23
  24 /* Dave Redman (djhr@tadpole.co.uk)
  25  * changed these to function pointers.. it saves cycles and will allow
  26  * the irq dependencies to be split into different files at a later date
  27  * sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
  28  * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  29  * Changed these to btfixup entities... It saves cycles :)
  30  */
  31 BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
  32 BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
  33 BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
  34 BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
  35 BTFIXUPDEF_CALL(void, clear_clock_irq, void)
  36 BTFIXUPDEF_CALL(void, clear_profile_irq, int)
  37 BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
  38
  39 static inline void disable_irq_nosync(unsigned int irq)
  40 {
  41         BTFIXUP_CALL(disable_irq)(irq);
  42 }
  43
  44 static inline void disable_irq(unsigned int irq)
  45 {
  46         BTFIXUP_CALL(disable_irq)(irq);
  47 }
  48
  49 static inline void enable_irq(unsigned int irq)
  50 {
  51         BTFIXUP_CALL(enable_irq)(irq);
  52 }
  53
  54 static inline void disable_pil_irq(unsigned int irq)
  55 {
  56         BTFIXUP_CALL(disable_pil_irq)(irq);
  57 }
  58
  59 static inline void enable_pil_irq(unsigned int irq)
  60 {
  61         BTFIXUP_CALL(enable_pil_irq)(irq);
  62 }
  63
  64 static inline void clear_clock_irq(void)
  65 {
  66         BTFIXUP_CALL(clear_clock_irq)();
  67 }
  68
  69 static inline void clear_profile_irq(int irq)
  70 {
  71         BTFIXUP_CALL(clear_profile_irq)(irq);
  72 }
  73
  74 static inline void load_profile_irq(int cpu, int limit)
  75 {
  76         BTFIXUP_CALL(load_profile_irq)(cpu, limit);
  77 }
  78
  79 extern void (*sparc_init_timers)(irqreturn_t (*lvl10_irq)(int, void *, struct pt_regs *));
  80 extern void claim_ticker14(irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
  81                            int irq,
  82                            unsigned int timeout);
  83
  84 #ifdef CONFIG_SMP
  85 BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
  86 BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
  87 BTFIXUPDEF_CALL(void, set_irq_udt, int)
  88
  89 #define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
  90 #define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
  91 #define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
  92 #endif
  93
  94 extern int request_fast_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, __const__ char *devname);
  95
  96 /* On the sun4m, just like the timers, we have both per-cpu and master
  97  * interrupt registers.
  98  */
  99
 100 /* These registers are used for sending/receiving irqs from/to
 101  * different cpu's.
 102  */
 103 struct sun4m_intreg_percpu {
 104         unsigned int tbt;        /* Interrupts still pending for this cpu. */
 105
 106         /* These next two registers are WRITE-ONLY and are only
 107          * "on bit" sensitive, "off bits" written have NO affect.
 108          */
 109         unsigned int clear;  /* Clear this cpus irqs here. */
 110         unsigned int set;    /* Set this cpus irqs here. */
 111         unsigned char space[PAGE_SIZE - 12];
 112 };
 113
 114 /*
 115  * djhr
 116  * Actually the clear and set fields in this struct are misleading..
 117  * according to the SLAVIO manual (and the same applies for the SEC)
 118  * the clear field clears bits in the mask which will ENABLE that IRQ
 119  * the set field sets bits in the mask to DISABLE the IRQ.
 120  *
 121  * Also the undirected_xx address in the SLAVIO is defined as
 122  * RESERVED and write only..
 123  *
 124  * DAVEM_NOTE: The SLAVIO only specifies behavior on uniprocessor
 125  *             sun4m machines, for MP the layout makes more sense.
 126  */
 127 struct sun4m_intregs {
 128         struct sun4m_intreg_percpu cpu_intregs[SUN4M_NCPUS];
 129         unsigned int tbt;                /* IRQ's that are still pending. */
 130         unsigned int irqs;               /* Master IRQ bits. */
 131
 132         /* Again, like the above, two these registers are WRITE-ONLY. */
 133         unsigned int clear;              /* Clear master IRQ's by setting bits here. */
 134         unsigned int set;                /* Set master IRQ's by setting bits here. */
 135
 136         /* This register is both READ and WRITE. */
 137         unsigned int undirected_target;  /* Which cpu gets undirected irqs. */
 138 };
 139
 140 extern struct sun4m_intregs *sun4m_interrupts;
 141
 142 /*
 143  * Bit field defines for the interrupt registers on various
 144  * Sparc machines.
 145  */
 146
 147 /* The sun4c interrupt register. */
 148 #define SUN4C_INT_ENABLE  0x01     /* Allow interrupts. */
 149 #define SUN4C_INT_E14     0x80     /* Enable level 14 IRQ. */
 150 #define SUN4C_INT_E10     0x20     /* Enable level 10 IRQ. */
 151 #define SUN4C_INT_E8      0x10     /* Enable level 8 IRQ. */
 152 #define SUN4C_INT_E6      0x08     /* Enable level 6 IRQ. */
 153 #define SUN4C_INT_E4      0x04     /* Enable level 4 IRQ. */
 154 #define SUN4C_INT_E1      0x02     /* Enable level 1 IRQ. */
 155
 156 /* Dave Redman (djhr@tadpole.co.uk)
 157  * The sun4m interrupt registers.
 158  */
 159 #define SUN4M_INT_ENABLE        0x80000000
 160 #define SUN4M_INT_E14           0x00000080
 161 #define SUN4M_INT_E10           0x00080000
 162
 163 #define SUN4M_HARD_INT(x)       (0x000000001 << (x))
 164 #define SUN4M_SOFT_INT(x)       (0x000010000 << (x))
 165
 166 #define SUN4M_INT_MASKALL       0x80000000        /* mask all interrupts */
 167 #define SUN4M_INT_MODULE_ERR    0x40000000        /* module error */
 168 #define SUN4M_INT_M2S_WRITE     0x20000000        /* write buffer error */
 169 #define SUN4M_INT_ECC           0x10000000        /* ecc memory error */
 170 #define SUN4M_INT_FLOPPY        0x00400000        /* floppy disk */
 171 #define SUN4M_INT_MODULE        0x00200000        /* module interrupt */
 172 #define SUN4M_INT_VIDEO         0x00100000        /* onboard video */
 173 #define SUN4M_INT_REALTIME      0x00080000        /* system timer */
 174 #define SUN4M_INT_SCSI          0x00040000        /* onboard scsi */
 175 #define SUN4M_INT_AUDIO         0x00020000        /* audio/isdn */
 176 #define SUN4M_INT_ETHERNET      0x00010000        /* onboard ethernet */
 177 #define SUN4M_INT_SERIAL        0x00008000        /* serial ports */
 178 #define SUN4M_INT_KBDMS         0x00004000        /* keyboard/mouse */
 179 #define SUN4M_INT_SBUSBITS      0x00003F80        /* sbus int bits */
 180
 181 #define SUN4M_INT_SBUS(x)       (1 << (x+7))
 182 #define SUN4M_INT_VME(x)        (1 << (x))
 183
 184 #endif