walnux/arch/arm/src/armv7-a/addrenv.h

/****************************************************************************
 * arch/arm/src/armv7-a/addrenv.h
 *
 *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

#ifndef __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H
#define __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <stdint.h>

#ifdef CONFIG_ARCH_ADDRENV

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Aligned size of the kernel stack */

#ifdef CONFIG_ARCH_KERNEL_STACK
#  define ARCH_KERNEL_STACKSIZE ((CONFIG_ARCH_KERNEL_STACKSIZE + 7) & ~7)
#endif

/* Using a 4KiB page size, each 1MiB section maps to a PTE containing
 * 256*2KiB entries
 */

#define ENTRIES_PER_L2TABLE 256

/****************************************************************************
 * Inline Functions
 ****************************************************************************/

#ifndef __ASSEMBLY__

#endif /* __ASSEMBLY__ */

/****************************************************************************
 * Public Variables
 ****************************************************************************/

#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: set_l2_entry
 *
 * Description:
 *   Set the L2 table entry as part of the initialization of the L2 Page
 *   table.
 *
 ****************************************************************************/

void set_l2_entry(FAR uint32_t *l2table, uintptr_t paddr, uintptr_t vaddr,
                  uint32_t mmuflags);

/****************************************************************************
 * Name: arm_addrenv_create_region
 *
 * Description:
 *   Create one memory region.
 *
 * Returned Value:
 *   On success, the number of pages allocated is returned.  Otherwise, a
 *   negated errno value is returned.
 *
 ****************************************************************************/

int arm_addrenv_create_region(FAR uintptr_t **list, unsigned int listlen,
                              uintptr_t vaddr, size_t regionsize,
                              uint32_t mmuflags);

/****************************************************************************
 * Name: arm_addrenv_destroy_region
 *
 * Description:
 *   Destroy one memory region.
 *
 ****************************************************************************/

void arm_addrenv_destroy_region(FAR uintptr_t **list, unsigned int listlen,
                                uintptr_t vaddr);

#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */

#endif  /* CONFIG_ARCH_ADDRENV */
#endif  /* __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H */