rom/kernel/statmemory.c

   1 #include <aros/config.h>
   2 #include <exec/execbase.h>
   3 #include <proto/arossupport.h>
   4 #include <proto/exec.h>
   5 #include <utility/tagitem.h>
   6
   7 #include <inttypes.h>
   8
   9 #include <kernel_base.h>
  10 #include <kernel_mm.h>
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/kernel.h>
  16
  17 AROS_LH2(ULONG, KrnStatMemoryA,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(ULONG, flags, D0),
  21         AROS_LHA(struct TagItem *, query, A0),
  22
  23 /*  LOCATION */
  24         struct KernelBase *, KernelBase, 32, Kernel)
  25
  26 /*  FUNCTION
  27         Get various statistics about memory usage
  28
  29     INPUTS
  30         query - An array of TagItems containing query specification. Each
  31                 TagItem consists of tag ID and a pointer to a value of
  32                 specified type which will contain the result of the query.
  33
  34                 Available tag IDs are:
  35
  36                 KMS_Free          (IPTR)  - Get amount of free memory in bytes
  37                 KMS_Total         (IPTR)  - Get total amount of memory in bytes
  38                 KMS_LargestAlloc  (IPTR)  - Get size of the largest allocated chunk in bytes
  39                 KMS_SmallestAlloc (IPTR)  - Get size of the smallest allocated chunk in bytes
  40                 KMS_LargestFree   (IPTR)  - Get size of the largest free chunk in bytes
  41                 KMS_SmallestFree  (IPTR)  - Get size of the smallest free chunk in bytes
  42                 KMS_NumAlloc      (IPTR)  - Get number of allocated chunks
  43                 KMS_NumFree       (IPTR)  - Get number of free chunks
  44                 KMS_PageSize      (ULONG) - Get memory page size
  45
  46         flags - Flags which specify physical properties of the memory to query.
  47                 These are the same flags as passed to exec.library/AllocMem().
  48
  49     RESULT
  50         TRUE if the function worked, FALSE if MMU is not up and running on the system.
  51         If the function returns FALSE, values will stay uninitialized.
  52
  53     NOTES
  54         For all unknown tag IDs result values will be set to 0.
  55
  56     EXAMPLE
  57
  58     BUGS
  59
  60     SEE ALSO
  61
  62     INTERNALS
  63
  64 ******************************************************************************/
  65 {
  66     AROS_LIBFUNC_INIT
  67
  68 #if USE_MMU
  69     if (KernelBase->kb_PageSize)
  70     {
  71         const struct TagItem *tstate = query;
  72         struct TagItem *tag;
  73         struct MemHeader *mh;
  74         BOOL do_traverse = FALSE;
  75
  76         while ((tag = LibNextTagItem(&tstate)))
  77         {
  78             switch (tag->ti_Tag)
  79             {
  80             case KMS_PageSize:
  81                 *((ULONG *)tag->ti_Data) = KernelBase->kb_PageSize;
  82                 break;
  83
  84             default:
  85                 /* Initialize all accumulated values to zero */
  86                 *((IPTR *)tag->ti_Data) = 0;
  87                 do_traverse = TRUE;
  88             }
  89         }
  90
  91         /* If we needed only page size, just return */
  92         if (!do_traverse)
  93             return TRUE;
  94
  95         /* Leave only flags that describe physical properties of the memory */
  96         flags &= MEMF_PHYSICAL_MASK;
  97
  98         /*
  99          * Loop over MemHeader structures.
 100          * We only add MemHeaders and never remove them, so i hope Forbid()/Permit()
 101          * is not really necessary here.
 102          */
 103         ForeachNode(&SysBase->MemList, mh)
 104         {
 105             /*
 106              * Check for the right requirements and enough free memory.
 107              * The requirements are OK if there's no bit in the
 108              * 'flags' that isn't set in the 'mh->mh_Attributes'.
 109              */
 110             if (flags & ~mh->mh_Attributes)
 111                 continue;
 112
 113             /* Get statistics. Total values will be summed up. */
 114             mm_StatMemHeader(mh, query, KernelBase);
 115         }
 116
 117         return TRUE;
 118     }
 119 #endif
 120     return FALSE;
 121
 122     AROS_LIBFUNC_EXIT
 123 }