source: rtems/bsps/aarch64/raspberrypi/start/bspstartmmu.c @ b57c6541

/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup RTEMSBSPsAArch64Raspberrypi4
 *
 * @brief This source file contains the default MMU tables and setup.
 */

/*
 * Copyright (C) 2022 Mohd Noor Aman
 *
 *
 * 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.
 *
 * 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.
 */

#include <bsp.h>
#include <bsp/start.h>
#include <bsp/aarch64-mmu.h>
#include <bsp/raspberrypi.h>
#include <libcpu/mmu-vmsav8-64.h>


BSP_START_DATA_SECTION static const aarch64_mmu_config_entry
raspberrypi_4_mmu_config_table[] = {
  AARCH64_MMU_DEFAULT_SECTIONS,

  { /* RPI peripheral address */
    .begin = (unsigned)RPI_PERIPHERAL_BASE,
    .end = (unsigned)RPI_PERIPHERAL_BASE + (unsigned)RPI_PERIPHERAL_SIZE,
    .flags = AARCH64_MMU_DEVICE
  },

  { /* RPI ARM local registers */
    .begin = (unsigned)BCM2711_LOCAL_REGS_BASE,
    .end = (unsigned)BCM2711_LOCAL_REGS_BASE + (unsigned)BCM2711_LOCAL_REGS_SIZE,
    .flags = AARCH64_MMU_DEVICE
  },

  { /* RPI GIC Interface address */
    .begin = 0xFF800000U,
    .end = 0xFFA00000U,
    .flags = AARCH64_MMU_DEVICE
  }

};
/*
 * Make weak and let the user override.
 */
BSP_START_TEXT_SECTION void
raspberrypi_4_setup_mmu_and_cache( void ) __attribute__ ((weak));

BSP_START_TEXT_SECTION void
raspberrypi_4_setup_mmu_and_cache( void )
{
  aarch64_mmu_setup();

  aarch64_mmu_setup_translation_table(
    &raspberrypi_4_mmu_config_table[ 0 ],
    RTEMS_ARRAY_SIZE( raspberrypi_4_mmu_config_table )
  );

  aarch64_mmu_enable();
}