git.sesse.net Git - pistorm/blob - a314/a314device/startup.c

   1 /*
   2  * Copyright 2020-2021 Niklas Ekström
   3  */
   4
   5 #include <exec/types.h>
   6 #include <exec/memory.h>
   7 #include <exec/tasks.h>
   8 #include <hardware/intbits.h>
   9 #include <libraries/expansion.h>
  10 #include <libraries/expansionbase.h>
  11
  12 #include <proto/exec.h>
  13 #include <proto/expansion.h>
  14
  15 #include "a314.h"
  16 #include "device.h"
  17 #include "protocol.h"
  18 #include "startup.h"
  19 #include "fix_mem_region.h"
  20 #include "debug.h"
  21
  22 #define A314_MANUFACTURER 0x07db
  23 #define A314_PRODUCT 0xa3
  24
  25 #define TASK_PRIORITY 80
  26 #define TASK_STACK_SIZE 1024
  27
  28 struct ExpansionBase *ExpansionBase;
  29 struct MsgPort task_mp;
  30 struct Task *task;
  31 struct ComArea *ca;
  32
  33 struct InterruptData
  34 {
  35         struct Task *task;
  36         struct ComArea *ca;
  37 };
  38
  39 struct InterruptData interrupt_data;
  40 struct Interrupt ports_interrupt;
  41
  42 extern void task_main();
  43 extern void init_sockets();
  44 extern void IntServer();
  45
  46 void NewList(struct List *l)
  47 {
  48         l->lh_Head = (struct Node *)&(l->lh_Tail);
  49         l->lh_Tail = NULL;
  50         l->lh_TailPred = (struct Node *)&(l->lh_Head);
  51 }
  52
  53 static struct Task *create_task(char *name, long priority, char *initialPC, unsigned long stacksize)
  54 {
  55         char *stack = AllocMem(stacksize, MEMF_CLEAR);
  56         if (stack == NULL)
  57                 return NULL;
  58
  59         struct Task *tc = AllocMem(sizeof(struct Task), MEMF_CLEAR | MEMF_PUBLIC);
  60         if (tc == NULL)
  61         {
  62                 FreeMem(stack, stacksize);
  63                 return NULL;
  64         }
  65
  66         tc->tc_Node.ln_Type = NT_TASK;
  67         tc->tc_Node.ln_Pri = priority;
  68         tc->tc_Node.ln_Name = name;
  69         tc->tc_SPLower = (APTR)stack;
  70         tc->tc_SPUpper = (APTR)(stack + stacksize);
  71         tc->tc_SPReg = (APTR)(stack + stacksize);
  72
  73         AddTask(tc, initialPC, 0);
  74         return tc;
  75 }
  76
  77 static void init_message_port()
  78 {
  79         task_mp.mp_Node.ln_Name = device_name;
  80         task_mp.mp_Node.ln_Pri = 0;
  81         task_mp.mp_Node.ln_Type = NT_MSGPORT;
  82         task_mp.mp_Flags = PA_SIGNAL;
  83         task_mp.mp_SigBit = SIGB_MSGPORT;
  84         task_mp.mp_SigTask = task;
  85         NewList(&(task_mp.mp_MsgList));
  86 }
  87
  88 static void add_interrupt_handler()
  89 {
  90         interrupt_data.task = task;
  91         interrupt_data.ca = ca;
  92
  93         ports_interrupt.is_Node.ln_Type = NT_INTERRUPT;
  94         ports_interrupt.is_Node.ln_Pri = 0;
  95         ports_interrupt.is_Node.ln_Name = device_name;
  96         ports_interrupt.is_Data = (APTR)&interrupt_data;
  97         ports_interrupt.is_Code = IntServer;
  98
  99         AddIntServer(INTB_PORTS, &ports_interrupt);
 100 }
 101
 102 BOOL task_start()
 103 {
 104         ExpansionBase = (struct ExpansionBase *)OpenLibrary(EXPANSIONNAME, 0);
 105         if (!ExpansionBase)
 106                 return FALSE;
 107
 108         struct ConfigDev *cd = FindConfigDev(NULL, A314_MANUFACTURER, A314_PRODUCT);
 109         if (!cd)
 110         {
 111                 CloseLibrary((struct Library *)ExpansionBase);
 112                 return FALSE;
 113         }
 114
 115         ca = (struct ComArea *)cd->cd_BoardAddr;
 116
 117         if (!fix_memory())
 118                 return FALSE;
 119
 120         task = create_task(device_name, TASK_PRIORITY, (void *)task_main, TASK_STACK_SIZE);
 121         if (task == NULL)
 122         {
 123                 debug_printf("Unable to create task\n");
 124                 return FALSE;
 125         }
 126
 127         init_message_port();
 128         init_sockets();
 129
 130         ca->a_enable = 0;
 131         unsigned char discard_value = ca->a_events;
 132
 133         ca->r_events = R_EVENT_STARTED;
 134
 135         add_interrupt_handler();
 136
 137         ca->a_enable = A_EVENT_R2A_TAIL;
 138
 139         return TRUE;
 140 }