toolchain/gcc/newlib/libc/sys/arc/mem-layout.c

   1 /* Ideally this kind of stuff is specified in a linker script.  It's not clear
   2    what the default linker script should do, so for now we have this.  */
   3
   4 /* Keep this file separate from sbrk.c so the programmer can supply his/her
   5    own _sbrk_r.  This file could go in crt0.S, but I want to keep this in C.
   6    This is all just an experiment anyway.  */
   7
   8 #ifndef STACK_SIZE
   9 /* Cache lines recycle at 4096 I think, and 4096 is listed as the page size,
  10    so we make the stack size a multiple of it.  Not that it's relevant or
  11    anything, but why not base it on *something*?  */
  12 #define STACK_SIZE (4096 * 4)
  13 #endif
  14
  15 int stack_size asm ("stack_size") = STACK_SIZE;
  16
  17 #ifndef SBRK_SIZE
  18 #define SBRK_SIZE (4096 * 32)
  19 #endif
  20
  21 int sbrk_size asm ("sbrk_size") = SBRK_SIZE;