LXR linux/arch/powerpc/platforms/cell/interrupt.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef ASM_CELL_PIC_H
   3#define ASM_CELL_PIC_H
   4#ifdef __KERNEL__
   5/*
   6 * Mapping of IIC pending bits into per-node interrupt numbers.
   7 *
   8 * Interrupt numbers are in the range 0...0x1ff where the top bit
   9 * (0x100) represent the source node. Only 2 nodes are supported with
  10 * the current code though it's trivial to extend that if necessary using
  11 * higher level bits
  12 *
  13 * The bottom 8 bits are split into 2 type bits and 6 data bits that
  14 * depend on the type:
  15 *
  16 * 00 (0x00 | data) : normal interrupt. data is (class << 4) | source
  17 * 01 (0x40 | data) : IO exception. data is the exception number as
  18 *                    defined by bit numbers in IIC_SR
  19 * 10 (0x80 | data) : IPI. data is the IPI number (obtained from the priority)
  20 *                    and node is always 0 (IPIs are per-cpu, their source is
  21 *                    not relevant)
  22 * 11 (0xc0 | data) : reserved
  23 *
  24 * In addition, interrupt number 0x80000000 is defined as always invalid
  25 * (that is the node field is expected to never extend to move than 23 bits)
  26 *
  27 */
  28
  29enum {
  30        IIC_IRQ_INVALID         = 0x80000000u,
  31        IIC_IRQ_NODE_MASK       = 0x100,
  32        IIC_IRQ_NODE_SHIFT      = 8,
  33        IIC_IRQ_MAX             = 0x1ff,
  34        IIC_IRQ_TYPE_MASK       = 0xc0,
  35        IIC_IRQ_TYPE_NORMAL     = 0x00,
  36        IIC_IRQ_TYPE_IOEXC      = 0x40,
  37        IIC_IRQ_TYPE_IPI        = 0x80,
  38        IIC_IRQ_CLASS_SHIFT     = 4,
  39        IIC_IRQ_CLASS_0         = 0x00,
  40        IIC_IRQ_CLASS_1         = 0x10,
  41        IIC_IRQ_CLASS_2         = 0x20,
  42        IIC_SOURCE_COUNT        = 0x200,
  43
  44        /* Here are defined the various source/dest units. Avoid using those
  45         * definitions if you can, they are mostly here for reference
  46         */
  47        IIC_UNIT_SPU_0          = 0x4,
  48        IIC_UNIT_SPU_1          = 0x7,
  49        IIC_UNIT_SPU_2          = 0x3,
  50        IIC_UNIT_SPU_3          = 0x8,
  51        IIC_UNIT_SPU_4          = 0x2,
  52        IIC_UNIT_SPU_5          = 0x9,
  53        IIC_UNIT_SPU_6          = 0x1,
  54        IIC_UNIT_SPU_7          = 0xa,
  55        IIC_UNIT_IOC_0          = 0x0,
  56        IIC_UNIT_IOC_1          = 0xb,
  57        IIC_UNIT_THREAD_0       = 0xe, /* target only */
  58        IIC_UNIT_THREAD_1       = 0xf, /* target only */
  59        IIC_UNIT_IIC            = 0xe, /* source only (IO exceptions) */
  60
  61        /* Base numbers for the external interrupts */
  62        IIC_IRQ_EXT_IOIF0       =
  63                IIC_IRQ_TYPE_NORMAL | IIC_IRQ_CLASS_2 | IIC_UNIT_IOC_0,
  64        IIC_IRQ_EXT_IOIF1       =
  65                IIC_IRQ_TYPE_NORMAL | IIC_IRQ_CLASS_2 | IIC_UNIT_IOC_1,
  66
  67        /* Base numbers for the IIC_ISR interrupts */
  68        IIC_IRQ_IOEX_TMI        = IIC_IRQ_TYPE_IOEXC | IIC_IRQ_CLASS_1 | 63,
  69        IIC_IRQ_IOEX_PMI        = IIC_IRQ_TYPE_IOEXC | IIC_IRQ_CLASS_1 | 62,
  70        IIC_IRQ_IOEX_ATI        = IIC_IRQ_TYPE_IOEXC | IIC_IRQ_CLASS_1 | 61,
  71        IIC_IRQ_IOEX_MATBFI     = IIC_IRQ_TYPE_IOEXC | IIC_IRQ_CLASS_1 | 60,
  72        IIC_IRQ_IOEX_ELDI       = IIC_IRQ_TYPE_IOEXC | IIC_IRQ_CLASS_1 | 59,
  73
  74        /* Which bits in IIC_ISR are edge sensitive */
  75        IIC_ISR_EDGE_MASK       = 0x4ul,
  76};
  77
  78extern void iic_init_IRQ(void);
  79extern void iic_message_pass(int cpu, int msg);
  80extern void iic_request_IPIs(void);
  81extern void iic_setup_cpu(void);
  82
  83extern u8 iic_get_target_id(int cpu);
  84
  85extern void spider_init_IRQ(void);
  86
  87extern void iic_set_interrupt_routing(int cpu, int thread, int priority);
  88
  89#endif
  90#endif /* ASM_CELL_PIC_H */
  91