include/asm-v850/gbus_int.h

   1 /*
   2  * include/asm-v850/gbus_int.h -- Midas labs GBUS interrupt support
   3  *
   4  *  Copyright (C) 2001,02  NEC Corporation
   5  *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #ifndef __V850_GBUS_INT_H__
  15 #define __V850_GBUS_INT_H__
  16
  17
  18 /* The GBUS interrupt interface has 32 interrupts shared among 4
  19    processor interrupts.  The 32 GBUS interrupts are divided into two
  20    sets of 16 each, for allocating among control registers, etc (there
  21    are two of each control register, with bits 0-15 controlling an
  22    interrupt each).  */
  23
  24 /* The GBUS interrupts themselves.  */
  25 #define IRQ_GBUS_INT(n)         (GBUS_INT_BASE_IRQ + (n))
  26 #define IRQ_GBUS_INT_NUM        32
  27
  28 /* Control registers.  */
  29 #define GBUS_INT_STATUS_ADDR(w) (GBUS_INT_BASE_ADDR + (w)*0x40)
  30 #define GBUS_INT_STATUS(w)      (*(volatile u16 *)GBUS_INT_STATUS_ADDR(w))
  31 #define GBUS_INT_CLEAR_ADDR(w)  (GBUS_INT_BASE_ADDR + 0x10 + (w)*0x40)
  32 #define GBUS_INT_CLEAR(w)       (*(volatile u16 *)GBUS_INT_CLEAR_ADDR(w))
  33 #define GBUS_INT_EDGE_ADDR(w)   (GBUS_INT_BASE_ADDR + 0x20 + (w)*0x40)
  34 #define GBUS_INT_EDGE(w)        (*(volatile u16 *)GBUS_INT_EDGE_ADDR(w))
  35 #define GBUS_INT_POLARITY_ADDR(w)       (GBUS_INT_BASE_ADDR + 0x30 + (w)*0x40)
  36 #define GBUS_INT_POLARITY(w)    (*(volatile u16 *)GBUS_INT_POLARITY_ADDR(w))
  37 /* This allows enabling interrupt bits in word W for interrupt GINTn.  */
  38 #define GBUS_INT_ENABLE_ADDR(w, n) \
  39    (GBUS_INT_BASE_ADDR + 0x100 + (w)*0x10 + (n)*0x20)
  40 #define GBUS_INT_ENABLE(w, n)   (*(volatile u16 *)GBUS_INT_ENABLE_ADDR(w, n))
  41
  42 /* Mapping between kernel interrupt numbers and hardware control regs/bits.  */
  43 #define GBUS_INT_BITS_PER_WORD  16
  44 #define GBUS_INT_NUM_WORDS      (IRQ_GBUS_INT_NUM / GBUS_INT_BITS_PER_WORD)
  45 #define GBUS_INT_IRQ_WORD(irq)  (((irq) - GBUS_INT_BASE_IRQ) >> 4)
  46 #define GBUS_INT_IRQ_BIT(irq)   (((irq) - GBUS_INT_BASE_IRQ) & 0xF)
  47 #define GBUS_INT_IRQ_MASK(irq)  (1 << GBUS_INT_IRQ_BIT(irq))
  48
  49
  50 /* Possible priorities for GBUS interrupts.  */
  51 #define GBUS_INT_PRIORITY_HIGH          2
  52 #define GBUS_INT_PRIORITY_MEDIUM        4
  53 #define GBUS_INT_PRIORITY_LOW           6
  54
  55
  56 #ifndef __ASSEMBLY__
  57
  58 /* Enable interrupt handling for interrupt IRQ.  */
  59 extern void gbus_int_enable_irq (unsigned irq);
  60 /* Disable interrupt handling for interrupt IRQ.  Note that any
  61    interrupts received while disabled will be delivered once the
  62    interrupt is enabled again, unless they are explicitly cleared using
  63    `gbus_int_clear_pending_irq'.  */
  64 extern void gbus_int_disable_irq (unsigned irq);
  65 /* Return true if interrupt handling for interrupt IRQ is enabled.  */
  66 extern int gbus_int_irq_enabled (unsigned irq);
  67 /* Disable all GBUS irqs.  */
  68 extern void gbus_int_disable_irqs (void);
  69 /* Clear any pending interrupts for IRQ.  */
  70 extern void gbus_int_clear_pending_irq (unsigned irq);
  71 /* Return true if interrupt IRQ is pending (but disabled).  */
  72 extern int gbus_int_irq_pending (unsigned irq);
  73
  74
  75 struct gbus_int_irq_init {
  76         const char *name;       /* name of interrupt type */
  77
  78         /* Range of kernel irq numbers for this type:
  79            BASE, BASE+INTERVAL, ..., BASE+INTERVAL*NUM  */
  80         unsigned base, num, interval;
  81
  82         unsigned priority;      /* interrupt priority to assign */
  83 };
  84 struct hw_interrupt_type;       /* fwd decl */
  85
  86 /* Initialize HW_IRQ_TYPES for GBUS irqs described in array
  87    INITS (which is terminated by an entry with the name field == 0).  */
  88 extern void gbus_int_init_irq_types (struct gbus_int_irq_init *inits,
  89                                      struct hw_interrupt_type *hw_irq_types);
  90
  91 /* Initialize GBUS interrupts.  */
  92 extern void gbus_int_init_irqs (void);
  93
  94 #endif /* !__ASSEMBLY__ */
  95
  96
  97 #endif /* __V850_GBUS_INT_H__ */