diff options
Diffstat (limited to 'bsps/aarch64/raspberrypi/start/bspstartmmu.c')
-rw-r--r-- | bsps/aarch64/raspberrypi/start/bspstartmmu.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/bsps/aarch64/raspberrypi/start/bspstartmmu.c b/bsps/aarch64/raspberrypi/start/bspstartmmu.c new file mode 100644 index 0000000000..18a9a112b0 --- /dev/null +++ b/bsps/aarch64/raspberrypi/start/bspstartmmu.c @@ -0,0 +1,84 @@ +/* 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(); +}
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