IFND    EXEC_MEMORY_I
EXEC_MEMORY_I   SET     1
**
**      $Filename: exec/memory.i $
**      $Release: 2.04 Includes, V37.4 $
**      $Revision: 36.11 $
**      $Date: 91/03/15 $
**
**      Definitions and structures used by the memory allocation system
**
**      (C) Copyright 1985-1999 Amiga, Inc.
**          All Rights Reserved
**

    IFND EXEC_NODES_I
    INCLUDE "exec/nodes.i"
    ENDC        ; EXEC_NODES_I


*---------------------------------------------------------------------
*
*   Memory List Structures
*
*---------------------------------------------------------------------
*
*   A memory list appears in two forms:  One is a requirements list
*   the other is a list of already allocated memory.  The format is
*   the same, with the reqirements/address field occupying the same
*   position.
*
*   The format is a linked list of ML structures each of which has
*   an array of ME entries.
*
*---------------------------------------------------------------------

 STRUCTURE ML,LN_SIZE
    UWORD   ML_NUMENTRIES           ; The number of ME structures that follow
    LABEL   ML_ME                   ; where the ME structures begin
    LABEL   ML_SIZE     ;Note: does NOT include any "ME" structures.


 STRUCTURE ME,0
    LABEL   ME_REQS                 ; the AllocMem requirements
    APTR    ME_ADDR                 ; the address of this block (an alias
                                    ;   for the same location as ME_REQS)
    ULONG   ME_LENGTH               ; the length of this region
    LABEL   ME_SIZE


*------ memory options:
*------ see the AllocMem() documentation for details------*

MEMF_ANY        EQU 0           ;Any type of memory will do
    BITDEF  MEM,PUBLIC,0
    BITDEF  MEM,CHIP,1
    BITDEF  MEM,FAST,2
    BITDEF  MEM,LOCAL,8         ;Memory that does not go away at RESET
    BITDEF  MEM,24BITDMA,9      ;DMAable memory within 24 bits of address

    BITDEF  MEM,CLEAR,16        ;AllocMem: NULL out area before return
    BITDEF  MEM,LARGEST,17      ;AvailMem: return the largest chunk size
    BITDEF  MEM,REVERSE,18      ;AllocMem: allocate from the top down
    BITDEF  MEM,TOTAL,19        ;AvailMem: return total size of memory


*----- Current alignment rules for memory blocks (may increase) -----
MEM_BLOCKSIZE   EQU 8
MEM_BLOCKMASK   EQU (MEM_BLOCKSIZE-1)


*---------------------------------------------------------------------
*
*   Memory Region Header
*
*---------------------------------------------------------------------

 STRUCTURE  MH,LN_SIZE              ; (LN_TYPE will be set to NT_MEMORY)
    UWORD   MH_ATTRIBUTES           ; characteristics of this region
    APTR    MH_FIRST                ; first free region
    APTR    MH_LOWER                ; lower memory bound
    APTR    MH_UPPER                ; upper memory bound+1
    ULONG   MH_FREE                 ; number of free bytes
    LABEL   MH_SIZE


*---------------------------------------------------------------------
*
*   Memory Chunk
*
*---------------------------------------------------------------------

 STRUCTURE  MC,0
    APTR    MC_NEXT                 ; ptr to next chunk
    ULONG   MC_BYTES                ; chunk byte size
    APTR    MC_SIZE

        ENDC    ; EXEC_MEMORY_I