kernel/config.h

   1 #ifndef CONFIG_H
   2 #define CONFIG_H
   3
   4 /* This file defines the kernel configuration. It allows to set sizes of some
   5  * kernel buffers and to enable or disable debugging code, timing features,
   6  * and individual kernel calls.
   7  *
   8  * Changes:
   9  *   Jul 11, 2005       Created.  (Jorrit N. Herder)
  10  */
  11
  12 /* In embedded and sensor applications, not all the kernel calls may be
  13  * needed. In this section you can specify which kernel calls are needed
  14  * and which are not. The code for unneeded kernel calls is not included in
  15  * the system binary, making it smaller. If you are not sure, it is best
  16  * to keep all kernel calls enabled.
  17  */
  18 #define USE_FORK           1    /* fork a new process */
  19 #define USE_NEWMAP         1    /* set a new memory map */
  20 #define USE_EXEC           1    /* update process after execute */
  21 #define USE_EXIT           1    /* clean up after process exit */
  22 #define USE_TRACE          1    /* process information and tracing */
  23 #define USE_GETKSIG        1    /* retrieve pending kernel signals */
  24 #define USE_ENDKSIG        1    /* finish pending kernel signals */
  25 #define USE_KILL           1    /* send a signal to a process */
  26 #define USE_SIGSEND        1    /* send POSIX-style signal */
  27 #define USE_SIGRETURN      1    /* sys_sigreturn(proc_nr, ctxt_ptr, flags) */
  28 #define USE_ABORT          1    /* shut down MINIX */
  29 #define USE_GETINFO        1    /* retrieve a copy of kernel data */
  30 #define USE_TIMES          1    /* get process and system time info */
  31 #define USE_SETALARM       1    /* schedule a synchronous alarm */
  32 #define USE_DEVIO          1    /* read or write a single I/O port */
  33 #define USE_VDEVIO         1    /* process vector with I/O requests */
  34 #define USE_SDEVIO         1    /* perform I/O request on a buffer */
  35 #define USE_IRQCTL         1    /* set an interrupt policy */
  36 #define USE_SEGCTL         1    /* set up a remote segment */
  37 #define USE_PRIVCTL        1    /* system privileges control */
  38 #define USE_NICE           1    /* change scheduling priority */
  39 #define USE_UMAP           1    /* map virtual to physical address */
  40 #define USE_VIRCOPY        1    /* copy using virtual addressing */
  41 #define USE_VIRVCOPY       1    /* vector with virtual copy requests */
  42 #define USE_PHYSCOPY       1    /* copy using physical addressing */
  43 #define USE_PHYSVCOPY      1    /* vector with physical copy requests */
  44 #define USE_MEMSET         1    /* write char to a given memory area */
  45
  46 /* Length of program names stored in the process table. This is only used
  47  * for the debugging dumps that can be generated with the IS server. The PM
  48  * server keeps its own copy of the program name.
  49  */
  50 #define P_NAME_LEN         8
  51
  52 /* Kernel diagnostics are written to a circular buffer. After each message,
  53  * a system server is notified and a copy of the buffer can be retrieved to
  54  * display the message. The buffers size can safely be reduced.
  55  */
  56 #define KMESS_BUF_SIZE   256
  57
  58 /* Buffer to gather randomness. This is used to generate a random stream by
  59  * the MEMORY driver when reading from /dev/random.
  60  */
  61 #define RANDOM_ELEMENTS   32
  62
  63 /* This section contains defines for valuable system resources that are used
  64  * by device drivers. The number of elements of the vectors is determined by
  65  * the maximum needed by any given driver. The number of interrupt hooks may
  66  * be incremented on systems with many device drivers.
  67  */
  68 #define NR_IRQ_HOOKS      16            /* number of interrupt hooks */
  69 #define VDEVIO_BUF_SIZE   64            /* max elements per VDEVIO request */
  70 #define VCOPY_VEC_SIZE    16            /* max elements per VCOPY request */
  71
  72 /* How many bytes for the kernel stack. Space allocated in mpx.s. */
  73 #define K_STACK_BYTES   1024
  74
  75 #define K_PARAM_SIZE     512
  76
  77 /* This section allows to enable kernel debugging and timing functionality.
  78  * For normal operation all options should be disabled.
  79  */
  80 #define DEBUG_SCHED_CHECK  0    /* sanity check of scheduling queues */
  81 #define DEBUG_TIME_LOCKS   0    /* measure time spent in locks */
  82
  83 #endif /* CONFIG_H */
  84