kernel/type.h

   1 #ifndef TYPE_H
   2 #define TYPE_H
   3
   4 typedef _PROTOTYPE( void task_t, (void) );
   5
   6 /* Process table and system property related types. */
   7 typedef int proc_nr_t;                  /* process table entry number */
   8 typedef short sys_id_t;                 /* system process index */
   9 typedef struct {                        /* bitmap for system indexes */
  10   bitchunk_t chunk[BITMAP_CHUNKS(NR_SYS_PROCS)];
  11 } sys_map_t;
  12
  13 struct boot_image {
  14   proc_nr_t proc_nr;                    /* process number to use */
  15   task_t *initial_pc;                   /* start function for tasks */
  16   int flags;                            /* process flags */
  17   unsigned char quantum;                /* quantum (tick count) */
  18   int priority;                         /* scheduling priority */
  19   int stksize;                          /* stack size for tasks */
  20   short trap_mask;                      /* allowed system call traps */
  21   bitchunk_t ipc_to;                    /* send mask protection */
  22   long call_mask;                       /* system call protection */
  23   char proc_name[P_NAME_LEN];           /* name in process table */
  24   int endpoint;                         /* endpoint number when started */
  25 };
  26
  27 struct memory {
  28   phys_clicks base;                     /* start address of chunk */
  29   phys_clicks size;                     /* size of memory chunk */
  30 };
  31
  32 /* The kernel outputs diagnostic messages in a circular buffer. */
  33 struct kmessages {
  34   int km_next;                          /* next index to write */
  35   int km_size;                          /* current size in buffer */
  36   char km_buf[KMESS_BUF_SIZE];          /* buffer for messages */
  37 };
  38
  39 struct randomness {
  40   struct {
  41         int r_next;                             /* next index to write */
  42         int r_size;                             /* number of random elements */
  43         unsigned short r_buf[RANDOM_ELEMENTS]; /* buffer for random info */
  44   } bin[RANDOM_SOURCES];
  45 };
  46
  47 #if (CHIP == INTEL)
  48 typedef unsigned reg_t;         /* machine register */
  49
  50 /* The stack frame layout is determined by the software, but for efficiency
  51  * it is laid out so the assembly code to use it is as simple as possible.
  52  * 80286 protected mode and all real modes use the same frame, built with
  53  * 16-bit registers.  Real mode lacks an automatic stack switch, so little
  54  * is lost by using the 286 frame for it.  The 386 frame differs only in
  55  * having 32-bit registers and more segment registers.  The same names are
  56  * used for the larger registers to avoid differences in the code.
  57  */
  58 struct stackframe_s {           /* proc_ptr points here */
  59 #if _WORD_SIZE == 4
  60   u16_t gs;                     /* last item pushed by save */
  61   u16_t fs;                     /*  ^ */
  62 #endif
  63   u16_t es;                     /*  | */
  64   u16_t ds;                     /*  | */
  65   reg_t di;                     /* di through cx are not accessed in C */
  66   reg_t si;                     /* order is to match pusha/popa */
  67   reg_t fp;                     /* bp */
  68   reg_t st;                     /* hole for another copy of sp */
  69   reg_t bx;                     /*  | */
  70   reg_t dx;                     /*  | */
  71   reg_t cx;                     /*  | */
  72   reg_t retreg;                 /* ax and above are all pushed by save */
  73   reg_t retadr;                 /* return address for assembly code save() */
  74   reg_t pc;                     /*  ^  last item pushed by interrupt */
  75   reg_t cs;                     /*  | */
  76   reg_t psw;                    /*  | */
  77   reg_t sp;                     /*  | */
  78   reg_t ss;                     /* these are pushed by CPU during interrupt */
  79 };
  80
  81 struct segdesc_s {              /* segment descriptor for protected mode */
  82   u16_t limit_low;
  83   u16_t base_low;
  84   u8_t base_middle;
  85   u8_t access;                  /* |P|DL|1|X|E|R|A| */
  86   u8_t granularity;             /* |G|X|0|A|LIMT| */
  87   u8_t base_high;
  88 };
  89
  90 typedef unsigned long irq_policy_t;
  91 typedef unsigned long irq_id_t;
  92
  93 typedef struct irq_hook {
  94   struct irq_hook *next;                /* next hook in chain */
  95   int (*handler)(struct irq_hook *);    /* interrupt handler */
  96   int irq;                              /* IRQ vector number */
  97   int id;                               /* id of this hook */
  98   int proc_nr_e;                        /* (endpoint) NONE if not in use */
  99   irq_id_t notify_id;                   /* id to return on interrupt */
 100   irq_policy_t policy;                  /* bit mask for policy */
 101 } irq_hook_t;
 102
 103 typedef int (*irq_handler_t)(struct irq_hook *);
 104
 105 #endif /* (CHIP == INTEL) */
 106
 107 #if (CHIP == M68000)
 108 /* M68000 specific types go here. */
 109 #endif /* (CHIP == M68000) */
 110
 111 #endif /* TYPE_H */