include/asm-blackfin/l1layout.h

   1 /*
   2  * l1layout.h
   3  * Defines a layout of L1 scratchpad memory that userspace can rely on.
   4  */
   5
   6 #ifndef _L1LAYOUT_H_
   7 #define _L1LAYOUT_H_
   8
   9 #include <asm/blackfin.h>
  10
  11 #ifndef __ASSEMBLY__
  12
  13 /* Data that is "mapped" into the process VM at the start of the L1 scratch
  14    memory, so that each process can access it at a fixed address.  Used for
  15    stack checking.  */
  16 struct l1_scratch_task_info
  17 {
  18         /* Points to the start of the stack.  */
  19         void *stack_start;
  20         /* Not updated by the kernel; a user process can modify this to
  21            keep track of the lowest address of the stack pointer during its
  22            runtime.  */
  23         void *lowest_sp;
  24 };
  25
  26 /* A pointer to the structure in memory.  */
  27 #define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)L1_SCRATCH_START)
  28
  29 #endif
  30
  31 #endif