l1layout.h

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/*
 * Defines a layout of L1 scratchpad memory that userspace can rely on.
 *
 * Copyright 2006-2008 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef _L1LAYOUT_H_
#define _L1LAYOUT_H_

#include <asm/blackfin.h>

#ifndef CONFIG_SMP
#ifndef __ASSEMBLY__

/* Data that is "mapped" into the process VM at the start of the L1 scratch
   memory, so that each process can access it at a fixed address.  Used for
   stack checking.  */
struct l1_scratch_task_info
{
    /* Points to the start of the stack.  */
    void *stack_start;
    /* Not updated by the kernel; a user process can modify this to
       keep track of the lowest address of the stack pointer during its
       runtime.  */
    void *lowest_sp;
};

/* A pointer to the structure in memory.  */
#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)\
                        get_l1_scratch_start())

#endif
#endif

#endif