arch/ppc64/kernel/mpic.h

   1 #include <linux/irq.h>
   2
   3 /*
   4  * Global registers
   5  */
   6
   7 #define MPIC_GREG_BASE                  0x01000
   8
   9 #define MPIC_GREG_FEATURE_0             0x00000
  10 #define         MPIC_GREG_FEATURE_LAST_SRC_MASK         0x07ff0000
  11 #define         MPIC_GREG_FEATURE_LAST_SRC_SHIFT        16
  12 #define         MPIC_GREG_FEATURE_LAST_CPU_MASK         0x00001f00
  13 #define         MPIC_GREG_FEATURE_LAST_CPU_SHIFT        8
  14 #define         MPIC_GREG_FEATURE_VERSION_MASK          0xff
  15 #define MPIC_GREG_FEATURE_1             0x00010
  16 #define MPIC_GREG_GLOBAL_CONF_0         0x00020
  17 #define         MPIC_GREG_GCONF_RESET                   0x80000000
  18 #define         MPIC_GREG_GCONF_8259_PTHROU_DIS         0x20000000
  19 #define         MPIC_GREG_GCONF_BASE_MASK               0x000fffff
  20 #define MPIC_GREG_GLOBAL_CONF_1         0x00030
  21 #define MPIC_GREG_VENDOR_0              0x00040
  22 #define MPIC_GREG_VENDOR_1              0x00050
  23 #define MPIC_GREG_VENDOR_2              0x00060
  24 #define MPIC_GREG_VENDOR_3              0x00070
  25 #define MPIC_GREG_VENDOR_ID             0x00080
  26 #define         MPIC_GREG_VENDOR_ID_STEPPING_MASK       0x00ff0000
  27 #define         MPIC_GREG_VENDOR_ID_STEPPING_SHIFT      16
  28 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK      0x0000ff00
  29 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT     8
  30 #define         MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK      0x000000ff
  31 #define MPIC_GREG_PROCESSOR_INIT        0x00090
  32 #define MPIC_GREG_IPI_VECTOR_PRI_0      0x000a0
  33 #define MPIC_GREG_IPI_VECTOR_PRI_1      0x000b0
  34 #define MPIC_GREG_IPI_VECTOR_PRI_2      0x000c0
  35 #define MPIC_GREG_IPI_VECTOR_PRI_3      0x000d0
  36 #define MPIC_GREG_SPURIOUS              0x000e0
  37 #define MPIC_GREG_TIMER_FREQ            0x000f0
  38
  39 /*
  40  *
  41  * Timer registers
  42  */
  43 #define MPIC_TIMER_BASE                 0x01100
  44 #define MPIC_TIMER_STRIDE               0x40
  45
  46 #define MPIC_TIMER_CURRENT_CNT          0x00000
  47 #define MPIC_TIMER_BASE_CNT             0x00010
  48 #define MPIC_TIMER_VECTOR_PRI           0x00020
  49 #define MPIC_TIMER_DESTINATION          0x00030
  50
  51 /*
  52  * Per-Processor registers
  53  */
  54
  55 #define MPIC_CPU_THISBASE               0x00000
  56 #define MPIC_CPU_BASE                   0x20000
  57 #define MPIC_CPU_STRIDE                 0x01000
  58
  59 #define MPIC_CPU_IPI_DISPATCH_0         0x00040
  60 #define MPIC_CPU_IPI_DISPATCH_1         0x00050
  61 #define MPIC_CPU_IPI_DISPATCH_2         0x00060
  62 #define MPIC_CPU_IPI_DISPATCH_3         0x00070
  63 #define MPIC_CPU_CURRENT_TASK_PRI       0x00080
  64 #define         MPIC_CPU_TASKPRI_MASK                   0x0000000f
  65 #define MPIC_CPU_WHOAMI                 0x00090
  66 #define         MPIC_CPU_WHOAMI_MASK                    0x0000001f
  67 #define MPIC_CPU_INTACK                 0x000a0
  68 #define MPIC_CPU_EOI                    0x000b0
  69
  70 /*
  71  * Per-source registers
  72  */
  73
  74 #define MPIC_IRQ_BASE                   0x10000
  75 #define MPIC_IRQ_STRIDE                 0x00020
  76 #define MPIC_IRQ_VECTOR_PRI             0x00000
  77 #define         MPIC_VECPRI_MASK                        0x80000000
  78 #define         MPIC_VECPRI_ACTIVITY                    0x40000000      /* Read Only */
  79 #define         MPIC_VECPRI_PRIORITY_MASK               0x000f0000
  80 #define         MPIC_VECPRI_PRIORITY_SHIFT              16
  81 #define         MPIC_VECPRI_VECTOR_MASK                 0x000007ff
  82 #define         MPIC_VECPRI_POLARITY_POSITIVE           0x00800000
  83 #define         MPIC_VECPRI_POLARITY_NEGATIVE           0x00000000
  84 #define         MPIC_VECPRI_POLARITY_MASK               0x00800000
  85 #define         MPIC_VECPRI_SENSE_LEVEL                 0x00400000
  86 #define         MPIC_VECPRI_SENSE_EDGE                  0x00000000
  87 #define         MPIC_VECPRI_SENSE_MASK                  0x00400000
  88 #define MPIC_IRQ_DESTINATION            0x00010
  89
  90 #define MPIC_MAX_IRQ_SOURCES    2048
  91 #define MPIC_MAX_CPUS           32
  92 #define MPIC_MAX_ISU            32
  93
  94 /*
  95  * Special vector numbers (internal use only)
  96  */
  97 #define MPIC_VEC_SPURRIOUS      255
  98 #define MPIC_VEC_IPI_3          254
  99 #define MPIC_VEC_IPI_2          253
 100 #define MPIC_VEC_IPI_1          252
 101 #define MPIC_VEC_IPI_0          251
 102
 103 /* unused */
 104 #define MPIC_VEC_TIMER_3        250
 105 #define MPIC_VEC_TIMER_2        249
 106 #define MPIC_VEC_TIMER_1        248
 107 #define MPIC_VEC_TIMER_0        247
 108
 109 /* Type definition of the cascade handler */
 110 typedef int (*mpic_cascade_t)(struct pt_regs *regs, void *data);
 111
 112 #ifdef CONFIG_MPIC_BROKEN_U3
 113 /* Fixup table entry */
 114 struct mpic_irq_fixup
 115 {
 116         u8 __iomem      *base;
 117         unsigned int   irq;
 118 };
 119 #endif /* CONFIG_MPIC_BROKEN_U3 */
 120
 121
 122 /* The instance data of a given MPIC */
 123 struct mpic
 124 {
 125         /* The "linux" controller struct */
 126         hw_irq_controller       hc_irq;
 127 #ifdef CONFIG_SMP
 128         hw_irq_controller       hc_ipi;
 129 #endif
 130         const char              *name;
 131         /* Flags */
 132         unsigned int            flags;
 133         /* How many irq sources in a given ISU */
 134         unsigned int            isu_size;
 135         unsigned int            isu_shift;
 136         unsigned int            isu_mask;
 137         /* Offset of irq vector numbers */
 138         unsigned int            irq_offset;
 139         unsigned int            irq_count;
 140         /* Offset of ipi vector numbers */
 141         unsigned int            ipi_offset;
 142         /* Number of sources */
 143         unsigned int            num_sources;
 144         /* Number of CPUs */
 145         unsigned int            num_cpus;
 146         /* cascade handler */
 147         mpic_cascade_t          cascade;
 148         void                    *cascade_data;
 149         unsigned int            cascade_vec;
 150         /* senses array */
 151         unsigned char           *senses;
 152         unsigned int            senses_count;
 153
 154 #ifdef CONFIG_MPIC_BROKEN_U3
 155         /* The fixup table */
 156         struct mpic_irq_fixup   *fixups;
 157         spinlock_t              fixup_lock;
 158 #endif
 159
 160         /* The various ioremap'ed bases */
 161         volatile u32 __iomem    *gregs;
 162         volatile u32 __iomem    *tmregs;
 163         volatile u32 __iomem    *cpuregs[MPIC_MAX_CPUS];
 164         volatile u32 __iomem    *isus[MPIC_MAX_ISU];
 165
 166         /* link */
 167         struct mpic             *next;
 168 };
 169
 170 /* This is the primary controller, only that one has IPIs and
 171  * has afinity control. A non-primary MPIC always uses CPU0
 172  * registers only
 173  */
 174 #define MPIC_PRIMARY                    0x00000001
 175 /* Set this for a big-endian MPIC */
 176 #define MPIC_BIG_ENDIAN                 0x00000002
 177 /* Broken U3 MPIC */
 178 #define MPIC_BROKEN_U3                  0x00000004
 179 /* Broken IPI registers (autodetected) */
 180 #define MPIC_BROKEN_IPI                 0x00000008
 181 /* MPIC wants a reset */
 182 #define MPIC_WANTS_RESET                0x00000010
 183
 184 /* Allocate the controller structure and setup the linux irq descs
 185  * for the range if interrupts passed in. No HW initialization is
 186  * actually performed.
 187  *
 188  * @phys_addr:  physial base address of the MPIC
 189  * @flags:      flags, see constants above
 190  * @isu_size:   number of interrupts in an ISU. Use 0 to use a
 191  *              standard ISU-less setup (aka powermac)
 192  * @irq_offset: first irq number to assign to this mpic
 193  * @irq_count:  number of irqs to use with this mpic IRQ sources. Pass 0
 194  *              to match the number of sources
 195  * @ipi_offset: first irq number to assign to this mpic IPI sources,
 196  *              used only on primary mpic
 197  * @senses:     array of sense values
 198  * @senses_num: number of entries in the array
 199  *
 200  * Note about the sense array. If none is passed, all interrupts are
 201  * setup to be level negative unless MPIC_BROKEN_U3 is set in which
 202  * case they are edge positive (and the array is ignored anyway).
 203  * The values in the array start at the first source of the MPIC,
 204  * that is senses[0] correspond to linux irq "irq_offset".
 205  */
 206 extern struct mpic *mpic_alloc(unsigned long phys_addr,
 207                                unsigned int flags,
 208                                unsigned int isu_size,
 209                                unsigned int irq_offset,
 210                                unsigned int irq_count,
 211                                unsigned int ipi_offset,
 212                                unsigned char *senses,
 213                                unsigned int senses_num,
 214                                const char *name);
 215
 216 /* Assign ISUs, to call before mpic_init()
 217  *
 218  * @mpic:       controller structure as returned by mpic_alloc()
 219  * @isu_num:    ISU number
 220  * @phys_addr:  physical address of the ISU
 221  */
 222 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
 223                             unsigned long phys_addr);
 224
 225 /* Initialize the controller. After this has been called, none of the above
 226  * should be called again for this mpic
 227  */
 228 extern void mpic_init(struct mpic *mpic);
 229
 230 /* Setup a cascade. Currently, only one cascade is supported this
 231  * way, though you can always do a normal request_irq() and add
 232  * other cascades this way. You should call this _after_ having
 233  * added all the ISUs
 234  *
 235  * @irq_no:     "linux" irq number of the cascade (that is offset'ed vector)
 236  * @handler:    cascade handler function
 237  */
 238 extern void mpic_setup_cascade(unsigned int irq_no, mpic_cascade_t hanlder,
 239                                void *data);
 240
 241 /*
 242  * All of the following functions must only be used after the
 243  * ISUs have been assigned and the controller fully initialized
 244  * with mpic_init()
 245  */
 246
 247
 248 /* Change/Read the priority of an interrupt. Default is 8 for irqs and
 249  * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
 250  * IPI number is then the offset'ed (linux irq number mapped to the IPI)
 251  */
 252 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
 253 extern unsigned int mpic_irq_get_priority(unsigned int irq);
 254
 255 /* Setup a non-boot CPU */
 256 extern void mpic_setup_this_cpu(void);
 257
 258 /* Request IPIs on primary mpic */
 259 extern void mpic_request_ipis(void);
 260
 261 /* Send an IPI (non offseted number 0..3) */
 262 extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
 263
 264 /* Fetch interrupt from a given mpic */
 265 extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs);
 266 /* This one gets to the primary mpic */
 267 extern int mpic_get_irq(struct pt_regs *regs);