include/asm-ppc/open_pic.h

   1 /*
   2  *  include/asm-ppc/open_pic.h -- OpenPIC Interrupt Handling
   3  *
   4  *  Copyright (C) 1997 Geert Uytterhoeven
   5  *
   6  *  This file is subject to the terms and conditions of the GNU General Public
   7  *  License.  See the file COPYING in the main directory of this archive
   8  *  for more details.
   9  *
  10  */
  11
  12 #ifndef _PPC_KERNEL_OPEN_PIC_H
  13 #define _PPC_KERNEL_OPEN_PIC_H
  14
  15 #include <linux/config.h>
  16 #include <linux/irq.h>
  17
  18 #define OPENPIC_SIZE    0x40000
  19
  20 /*
  21  *  Non-offset'ed vector numbers
  22  */
  23
  24 #define OPENPIC_VEC_TIMER       110     /* and up */
  25 #define OPENPIC_VEC_IPI         118     /* and up */
  26 #define OPENPIC_VEC_SPURIOUS    255
  27
  28 /* OpenPIC IRQ controller structure */
  29 extern struct hw_interrupt_type open_pic;
  30
  31 /* OpenPIC IPI controller structure */
  32 #ifdef CONFIG_SMP
  33 extern struct hw_interrupt_type open_pic_ipi;
  34 #endif /* CONFIG_SMP */
  35
  36 extern u_int OpenPIC_NumInitSenses;
  37 extern u_char *OpenPIC_InitSenses;
  38 extern void __iomem * OpenPIC_Addr;
  39 extern int epic_serial_mode;
  40
  41 /* Exported functions */
  42 extern void openpic_set_sources(int first_irq, int num_irqs, void __iomem *isr);
  43 extern void openpic_init(int linux_irq_offset);
  44 extern void openpic_init_nmi_irq(u_int irq);
  45 extern void openpic_hookup_cascade(u_int irq, char *name,
  46                                    int (*cascade_fn)(struct pt_regs *));
  47 extern u_int openpic_irq(void);
  48 extern void openpic_eoi(void);
  49 extern void openpic_request_IPIs(void);
  50 extern void do_openpic_setup_cpu(void);
  51 extern int openpic_get_irq(struct pt_regs *regs);
  52 extern void openpic_reset_processor_phys(u_int cpumask);
  53 extern void openpic_setup_ISU(int isu_num, unsigned long addr);
  54 extern void openpic_cause_IPI(u_int ipi, cpumask_t cpumask);
  55 extern void smp_openpic_message_pass(int target, int msg, unsigned long data,
  56                                      int wait);
  57 extern void openpic_set_k2_cascade(int irq);
  58 extern void openpic_set_priority(u_int pri);
  59 extern u_int openpic_get_priority(void);
  60
  61 extern inline int openpic_to_irq(int irq)
  62 {
  63         /* IRQ 0 usually means 'disabled'.. don't mess with it
  64          * exceptions to this (sandpoint maybe?)
  65          * shouldn't use openpic_to_irq
  66          */
  67         if (irq != 0){
  68                 return irq += NUM_8259_INTERRUPTS;
  69         } else {
  70                 return 0;
  71         }
  72 }
  73 /* Support for second openpic on G5 macs */
  74
  75 // FIXME: To be replaced by sane cascaded controller management */
  76
  77 #define PMAC_OPENPIC2_OFFSET    128
  78
  79 #define OPENPIC2_VEC_TIMER      110     /* and up */
  80 #define OPENPIC2_VEC_IPI        118     /* and up */
  81 #define OPENPIC2_VEC_SPURIOUS   127
  82
  83
  84 extern void* OpenPIC2_Addr;
  85
  86 /* Exported functions */
  87 extern void openpic2_set_sources(int first_irq, int num_irqs, void *isr);
  88 extern void openpic2_init(int linux_irq_offset);
  89 extern void openpic2_init_nmi_irq(u_int irq);
  90 extern u_int openpic2_irq(void);
  91 extern void openpic2_eoi(void);
  92 extern int openpic2_get_irq(struct pt_regs *regs);
  93 extern void openpic2_setup_ISU(int isu_num, unsigned long addr);
  94 #endif /* _PPC_KERNEL_OPEN_PIC_H */