include/asm-powerpc/mpic.h

   1 #ifndef _ASM_POWERPC_MPIC_H
   2 #define _ASM_POWERPC_MPIC_H
   3
   4 #include <linux/irq.h>
   5
   6 /*
   7  * Global registers
   8  */
   9
  10 #define MPIC_GREG_BASE                  0x01000
  11
  12 #define MPIC_GREG_FEATURE_0             0x00000
  13 #define         MPIC_GREG_FEATURE_LAST_SRC_MASK         0x07ff0000
  14 #define         MPIC_GREG_FEATURE_LAST_SRC_SHIFT        16
  15 #define         MPIC_GREG_FEATURE_LAST_CPU_MASK         0x00001f00
  16 #define         MPIC_GREG_FEATURE_LAST_CPU_SHIFT        8
  17 #define         MPIC_GREG_FEATURE_VERSION_MASK          0xff
  18 #define MPIC_GREG_FEATURE_1             0x00010
  19 #define MPIC_GREG_GLOBAL_CONF_0         0x00020
  20 #define         MPIC_GREG_GCONF_RESET                   0x80000000
  21 #define         MPIC_GREG_GCONF_8259_PTHROU_DIS         0x20000000
  22 #define         MPIC_GREG_GCONF_BASE_MASK               0x000fffff
  23 #define MPIC_GREG_GLOBAL_CONF_1         0x00030
  24 #define MPIC_GREG_VENDOR_0              0x00040
  25 #define MPIC_GREG_VENDOR_1              0x00050
  26 #define MPIC_GREG_VENDOR_2              0x00060
  27 #define MPIC_GREG_VENDOR_3              0x00070
  28 #define MPIC_GREG_VENDOR_ID             0x00080
  29 #define         MPIC_GREG_VENDOR_ID_STEPPING_MASK       0x00ff0000
  30 #define         MPIC_GREG_VENDOR_ID_STEPPING_SHIFT      16
  31 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK      0x0000ff00
  32 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT     8
  33 #define         MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK      0x000000ff
  34 #define MPIC_GREG_PROCESSOR_INIT        0x00090
  35 #define MPIC_GREG_IPI_VECTOR_PRI_0      0x000a0
  36 #define MPIC_GREG_IPI_VECTOR_PRI_1      0x000b0
  37 #define MPIC_GREG_IPI_VECTOR_PRI_2      0x000c0
  38 #define MPIC_GREG_IPI_VECTOR_PRI_3      0x000d0
  39 #define MPIC_GREG_SPURIOUS              0x000e0
  40 #define MPIC_GREG_TIMER_FREQ            0x000f0
  41
  42 /*
  43  *
  44  * Timer registers
  45  */
  46 #define MPIC_TIMER_BASE                 0x01100
  47 #define MPIC_TIMER_STRIDE               0x40
  48
  49 #define MPIC_TIMER_CURRENT_CNT          0x00000
  50 #define MPIC_TIMER_BASE_CNT             0x00010
  51 #define MPIC_TIMER_VECTOR_PRI           0x00020
  52 #define MPIC_TIMER_DESTINATION          0x00030
  53
  54 /*
  55  * Per-Processor registers
  56  */
  57
  58 #define MPIC_CPU_THISBASE               0x00000
  59 #define MPIC_CPU_BASE                   0x20000
  60 #define MPIC_CPU_STRIDE                 0x01000
  61
  62 #define MPIC_CPU_IPI_DISPATCH_0         0x00040
  63 #define MPIC_CPU_IPI_DISPATCH_1         0x00050
  64 #define MPIC_CPU_IPI_DISPATCH_2         0x00060
  65 #define MPIC_CPU_IPI_DISPATCH_3         0x00070
  66 #define MPIC_CPU_CURRENT_TASK_PRI       0x00080
  67 #define         MPIC_CPU_TASKPRI_MASK                   0x0000000f
  68 #define MPIC_CPU_WHOAMI                 0x00090
  69 #define         MPIC_CPU_WHOAMI_MASK                    0x0000001f
  70 #define MPIC_CPU_INTACK                 0x000a0
  71 #define MPIC_CPU_EOI                    0x000b0
  72
  73 /*
  74  * Per-source registers
  75  */
  76
  77 #define MPIC_IRQ_BASE                   0x10000
  78 #define MPIC_IRQ_STRIDE                 0x00020
  79 #define MPIC_IRQ_VECTOR_PRI             0x00000
  80 #define         MPIC_VECPRI_MASK                        0x80000000
  81 #define         MPIC_VECPRI_ACTIVITY                    0x40000000      /* Read Only */
  82 #define         MPIC_VECPRI_PRIORITY_MASK               0x000f0000
  83 #define         MPIC_VECPRI_PRIORITY_SHIFT              16
  84 #define         MPIC_VECPRI_VECTOR_MASK                 0x000007ff
  85 #define         MPIC_VECPRI_POLARITY_POSITIVE           0x00800000
  86 #define         MPIC_VECPRI_POLARITY_NEGATIVE           0x00000000
  87 #define         MPIC_VECPRI_POLARITY_MASK               0x00800000
  88 #define         MPIC_VECPRI_SENSE_LEVEL                 0x00400000
  89 #define         MPIC_VECPRI_SENSE_EDGE                  0x00000000
  90 #define         MPIC_VECPRI_SENSE_MASK                  0x00400000
  91 #define MPIC_IRQ_DESTINATION            0x00010
  92
  93 #define MPIC_MAX_IRQ_SOURCES    2048
  94 #define MPIC_MAX_CPUS           32
  95 #define MPIC_MAX_ISU            32
  96
  97 /*
  98  * Special vector numbers (internal use only)
  99  */
 100 #define MPIC_VEC_SPURRIOUS      255
 101 #define MPIC_VEC_IPI_3          254
 102 #define MPIC_VEC_IPI_2          253
 103 #define MPIC_VEC_IPI_1          252
 104 #define MPIC_VEC_IPI_0          251
 105
 106 /* unused */
 107 #define MPIC_VEC_TIMER_3        250
 108 #define MPIC_VEC_TIMER_2        249
 109 #define MPIC_VEC_TIMER_1        248
 110 #define MPIC_VEC_TIMER_0        247
 111
 112 /* Type definition of the cascade handler */
 113 typedef int (*mpic_cascade_t)(struct pt_regs *regs, void *data);
 114
 115 #ifdef CONFIG_MPIC_BROKEN_U3
 116 /* Fixup table entry */
 117 struct mpic_irq_fixup
 118 {
 119         u8 __iomem      *base;
 120         unsigned int   irq;
 121 };
 122 #endif /* CONFIG_MPIC_BROKEN_U3 */
 123
 124
 125 /* The instance data of a given MPIC */
 126 struct mpic
 127 {
 128         /* The "linux" controller struct */
 129         hw_irq_controller       hc_irq;
 130 #ifdef CONFIG_SMP
 131         hw_irq_controller       hc_ipi;
 132 #endif
 133         const char              *name;
 134         /* Flags */
 135         unsigned int            flags;
 136         /* How many irq sources in a given ISU */
 137         unsigned int            isu_size;
 138         unsigned int            isu_shift;
 139         unsigned int            isu_mask;
 140         /* Offset of irq vector numbers */
 141         unsigned int            irq_offset;
 142         unsigned int            irq_count;
 143         /* Offset of ipi vector numbers */
 144         unsigned int            ipi_offset;
 145         /* Number of sources */
 146         unsigned int            num_sources;
 147         /* Number of CPUs */
 148         unsigned int            num_cpus;
 149         /* cascade handler */
 150         mpic_cascade_t          cascade;
 151         void                    *cascade_data;
 152         unsigned int            cascade_vec;
 153         /* senses array */
 154         unsigned char           *senses;
 155         unsigned int            senses_count;
 156
 157 #ifdef CONFIG_MPIC_BROKEN_U3
 158         /* The fixup table */
 159         struct mpic_irq_fixup   *fixups;
 160         spinlock_t              fixup_lock;
 161 #endif
 162
 163         /* The various ioremap'ed bases */
 164         volatile u32 __iomem    *gregs;
 165         volatile u32 __iomem    *tmregs;
 166         volatile u32 __iomem    *cpuregs[MPIC_MAX_CPUS];
 167         volatile u32 __iomem    *isus[MPIC_MAX_ISU];
 168
 169         /* link */
 170         struct mpic             *next;
 171 };
 172
 173 /* This is the primary controller, only that one has IPIs and
 174  * has afinity control. A non-primary MPIC always uses CPU0
 175  * registers only
 176  */
 177 #define MPIC_PRIMARY                    0x00000001
 178 /* Set this for a big-endian MPIC */
 179 #define MPIC_BIG_ENDIAN                 0x00000002
 180 /* Broken U3 MPIC */
 181 #define MPIC_BROKEN_U3                  0x00000004
 182 /* Broken IPI registers (autodetected) */
 183 #define MPIC_BROKEN_IPI                 0x00000008
 184 /* MPIC wants a reset */
 185 #define MPIC_WANTS_RESET                0x00000010
 186
 187 /* Allocate the controller structure and setup the linux irq descs
 188  * for the range if interrupts passed in. No HW initialization is
 189  * actually performed.
 190  *
 191  * @phys_addr:  physial base address of the MPIC
 192  * @flags:      flags, see constants above
 193  * @isu_size:   number of interrupts in an ISU. Use 0 to use a
 194  *              standard ISU-less setup (aka powermac)
 195  * @irq_offset: first irq number to assign to this mpic
 196  * @irq_count:  number of irqs to use with this mpic IRQ sources. Pass 0
 197  *              to match the number of sources
 198  * @ipi_offset: first irq number to assign to this mpic IPI sources,
 199  *              used only on primary mpic
 200  * @senses:     array of sense values
 201  * @senses_num: number of entries in the array
 202  *
 203  * Note about the sense array. If none is passed, all interrupts are
 204  * setup to be level negative unless MPIC_BROKEN_U3 is set in which
 205  * case they are edge positive (and the array is ignored anyway).
 206  * The values in the array start at the first source of the MPIC,
 207  * that is senses[0] correspond to linux irq "irq_offset".
 208  */
 209 extern struct mpic *mpic_alloc(unsigned long phys_addr,
 210                                unsigned int flags,
 211                                unsigned int isu_size,
 212                                unsigned int irq_offset,
 213                                unsigned int irq_count,
 214                                unsigned int ipi_offset,
 215                                unsigned char *senses,
 216                                unsigned int senses_num,
 217                                const char *name);
 218
 219 /* Assign ISUs, to call before mpic_init()
 220  *
 221  * @mpic:       controller structure as returned by mpic_alloc()
 222  * @isu_num:    ISU number
 223  * @phys_addr:  physical address of the ISU
 224  */
 225 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
 226                             unsigned long phys_addr);
 227
 228 /* Initialize the controller. After this has been called, none of the above
 229  * should be called again for this mpic
 230  */
 231 extern void mpic_init(struct mpic *mpic);
 232
 233 /* Setup a cascade. Currently, only one cascade is supported this
 234  * way, though you can always do a normal request_irq() and add
 235  * other cascades this way. You should call this _after_ having
 236  * added all the ISUs
 237  *
 238  * @irq_no:     "linux" irq number of the cascade (that is offset'ed vector)
 239  * @handler:    cascade handler function
 240  */
 241 extern void mpic_setup_cascade(unsigned int irq_no, mpic_cascade_t hanlder,
 242                                void *data);
 243
 244 /*
 245  * All of the following functions must only be used after the
 246  * ISUs have been assigned and the controller fully initialized
 247  * with mpic_init()
 248  */
 249
 250
 251 /* Change/Read the priority of an interrupt. Default is 8 for irqs and
 252  * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
 253  * IPI number is then the offset'ed (linux irq number mapped to the IPI)
 254  */
 255 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
 256 extern unsigned int mpic_irq_get_priority(unsigned int irq);
 257
 258 /* Setup a non-boot CPU */
 259 extern void mpic_setup_this_cpu(void);
 260
 261 /* Clean up for kexec (or cpu offline or ...) */
 262 extern void mpic_teardown_this_cpu(int secondary);
 263
 264 /* Get the current cpu priority for this cpu (0..15) */
 265 extern int mpic_cpu_get_priority(void);
 266
 267 /* Set the current cpu priority for this cpu */
 268 extern void mpic_cpu_set_priority(int prio);
 269
 270 /* Request IPIs on primary mpic */
 271 extern void mpic_request_ipis(void);
 272
 273 /* Send an IPI (non offseted number 0..3) */
 274 extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
 275
 276 /* Fetch interrupt from a given mpic */
 277 extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs);
 278 /* This one gets to the primary mpic */
 279 extern int mpic_get_irq(struct pt_regs *regs);
 280
 281 /* global mpic for pSeries */
 282 extern struct mpic *pSeries_mpic;
 283
 284 #endif  /* _ASM_POWERPC_MPIC_H */