/* memory.h - roundmb, truncmb, freestk */

#define PAGE_SIZE       4096

/*----------------------------------------------------------------------
 * roundmb, truncmb - Round or truncate address to memory block size
 *----------------------------------------------------------------------
 */
#define roundmb(x)      (char *)( (7 + (uint32)(x)) & (~7) )
#define truncmb(x)      (char *)( ((uint32)(x)) & (~7) )

/*----------------------------------------------------------------------
 *  freestk  --  Free stack memory allocated by getstk
 *----------------------------------------------------------------------
 */
#define freestk(p,len)  freemem((char *)((uint32)(p)            \
                                - ((uint32)roundmb(len))        \
                                + (uint32)sizeof(uint32)),      \
                                (uint32)roundmb(len) )

struct  memblk  {                       /* See roundmb & truncmb        */
        struct  memblk  *mnext;         /* Ptr to next free memory blk  */
        uint32  mlength;                /* Size of blk (includes memblk)*/
        };
extern  struct  memblk  memlist;        /* Head of free memory list     */
extern  void    *minheap;               /* Start of heap                */
extern  void    *maxheap;               /* Highest valid heap address   */


/* Added by linker */

extern  int     text;                   /* Start of text segment        */
extern  int     etext;                  /* End of text segment          */
extern  int     data;                   /* Start of data segment        */
extern  int     edata;                  /* End of data segment          */
extern  int     bss;                    /* Start of bss segment         */
extern  int     ebss;                   /* End of bss segment           */
extern  int     end;                    /* End of program               */