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   1 /* Copyright 2018 SiFive, Inc */
   2 /* SPDX-License-Identifier: Apache-2.0 */
   3
   4 #include <metal/machine/platform.h>
   5
   6 #ifdef METAL_SIFIVE_LOCAL_EXTERNAL_INTERRUPTS0
   7
   8 #include <metal/io.h>
   9 #include <metal/drivers/sifive_local-external-interrupts0.h>
  10 #include <metal/machine.h>
  11
  12 void __metal_driver_sifive_local_external_interrupt_init(struct metal_interrupt *controller)
  13 {
  14     struct __metal_driver_sifive_local_external_interrupts0 *local0;
  15
  16     local0 = (struct __metal_driver_sifive_local_external_interrupts0 *)(controller);
  17     if ( !local0->init_done ) {
  18         struct metal_interrupt *intc =
  19             __metal_driver_sifive_local_external_interrupts0_interrupt_parent(controller);
  20
  21         if (intc) {
  22             /* Register its interruptswith with parent controller, aka all external to default isr */
  23             for (int i = 0;
  24                  i < __metal_driver_sifive_local_external_interrupts0_num_interrupts(controller);
  25                  i++) {
  26                 intc->vtable->interrupt_register(intc,
  27                     __metal_driver_sifive_local_external_interrupts0_interrupt_lines(controller, i),
  28                                            NULL, controller);
  29             }
  30             local0->init_done = 1;
  31         }
  32     }
  33 }
  34
  35 int __metal_driver_sifive_local_external_interrupt_register(struct metal_interrupt *controller,
  36                                                           int id, metal_interrupt_handler_t isr,
  37                                                           void *priv)
  38 {
  39     int rc = -1;
  40
  41     if (id != 0) {
  42         struct metal_interrupt *intc =
  43             __metal_driver_sifive_local_external_interrupts0_interrupt_parent(controller);
  44
  45         /* Enable its interrupts with parent controller */
  46         if (intc) {
  47             rc = intc->vtable->interrupt_register(intc, id, isr, priv);
  48         }
  49     }
  50     return rc;
  51 }
  52
  53 int __metal_driver_sifive_local_external_interrupt_enable(struct metal_interrupt *controller, int id)
  54 {
  55     int rc = -1;
  56
  57     if (id != 0) {
  58         struct metal_interrupt *intc =
  59             __metal_driver_sifive_local_external_interrupts0_interrupt_parent(controller);
  60
  61         /* Enable its interrupts with parent controller */
  62         if (intc) {
  63             rc = intc->vtable->interrupt_enable(intc, id);
  64         }
  65     }
  66     return rc;
  67 }
  68
  69 int __metal_driver_sifive_local_external_interrupt_disable(struct metal_interrupt *controller, int id)
  70 {
  71     int rc = -1;
  72
  73     if (id != 0) {
  74         struct metal_interrupt *intc =
  75             __metal_driver_sifive_local_external_interrupts0_interrupt_parent(controller);
  76
  77         /* Enable its interrupts with parent controller */
  78         if (intc) {
  79             rc = intc->vtable->interrupt_disable(intc, id);
  80         }
  81     }
  82     return rc;
  83 }
  84
  85 int __metal_driver_sifive_local_external_interrupt_set_threshold(struct metal_interrupt *controller,
  86                                                                   unsigned int threshold)
  87 {
  88     /* Core controller does not support threshold configuration */
  89     return -1;
  90 }
  91
  92 unsigned int __metal_driver_sifive_local_external_interrupt_get_threshold(struct metal_interrupt *controller)
  93 {
  94     /* Core controller does not support threshold configuration */
  95     return 0;
  96 }
  97
  98
  99 int __metal_driver_sifive_local_external_interrupt_set_priority(struct metal_interrupt *controller,
 100                                                                 int id, unsigned int priority)
 101 {
 102     /* Core controller does not support priority configuration */
 103     return -1;
 104 }
 105
 106 unsigned int __metal_driver_sifive_local_external_interrupt_get_priority(struct metal_interrupt *controller, int id)
 107 {
 108     /* Core controller does not support priority configuration */
 109     return 0;
 110 }
 111
 112 int __metal_driver_sifive_local_external_command_request (struct metal_interrupt *controller,
 113                                                         int command, void *data)
 114 {
 115     int idx;
 116     int rc = -1;
 117
 118     switch (command) {
 119     case METAL_MAX_INTERRUPT_GET:
 120         rc = __metal_driver_sifive_local_external_interrupts0_num_interrupts(controller);
 121         break;
 122     case METAL_INDEX_INTERRUPT_GET:
 123         rc = 0;
 124         if (data) {
 125             idx = *(int *)data;
 126             rc = __metal_driver_sifive_local_external_interrupts0_interrupt_lines(controller, idx);
 127         }
 128         break;
 129     default:
 130         break;
 131     }
 132
 133     return rc;
 134 }
 135
 136 __METAL_DEFINE_VTABLE(__metal_driver_vtable_sifive_local_external_interrupts0) = {
 137     .local0_vtable.interrupt_init     = __metal_driver_sifive_local_external_interrupt_init,
 138     .local0_vtable.interrupt_register = __metal_driver_sifive_local_external_interrupt_register,
 139     .local0_vtable.interrupt_enable   = __metal_driver_sifive_local_external_interrupt_enable,
 140     .local0_vtable.interrupt_disable  = __metal_driver_sifive_local_external_interrupt_disable,
 141     .local0_vtable.interrupt_get_threshold  = __metal_driver_sifive_local_external_interrupt_get_threshold,
 142     .local0_vtable.interrupt_set_threshold  = __metal_driver_sifive_local_external_interrupt_set_threshold,
 143     .local0_vtable.interrupt_get_priority   = __metal_driver_sifive_local_external_interrupt_get_priority,
 144     .local0_vtable.interrupt_set_priority   = __metal_driver_sifive_local_external_interrupt_set_priority,
 145     .local0_vtable.command_request    = __metal_driver_sifive_local_external_command_request,
 146 };
 147
 148 #endif
 149
 150 typedef int no_empty_translation_units;
 151