forked from Imagelibrary/rtems
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSBSPsAArch64Raspberrypi4
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*
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* @brief This source file contains the default MMU tables and setup.
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*/
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/*
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* Copyright (C) 2022 Mohd Noor Aman
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <bsp.h>
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#include <bsp/start.h>
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#include <bsp/aarch64-mmu.h>
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#include <bsp/raspberrypi.h>
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#include <libcpu/mmu-vmsav8-64.h>
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BSP_START_DATA_SECTION static const aarch64_mmu_config_entry
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raspberrypi_4_mmu_config_table[] = {
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AARCH64_MMU_DEFAULT_SECTIONS,
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{ /* RPI peripheral address */
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.begin = (unsigned)RPI_PERIPHERAL_BASE,
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.end = (unsigned)RPI_PERIPHERAL_BASE + (unsigned)RPI_PERIPHERAL_SIZE,
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.flags = AARCH64_MMU_DEVICE
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},
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{ /* RPI ARM local registers */
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.begin = (unsigned)BCM2711_LOCAL_REGS_BASE,
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.end = (unsigned)BCM2711_LOCAL_REGS_BASE + (unsigned)BCM2711_LOCAL_REGS_SIZE,
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.flags = AARCH64_MMU_DEVICE
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},
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{ /* RPI firmware-owned addresses including spintables */
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.begin = (unsigned)0x0,
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.end = (unsigned)0x1000,
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.flags = AARCH64_MMU_DEVICE
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},
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{ /* RPI GIC Interface address */
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.begin = 0xFF800000U,
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.end = 0xFFA00000U,
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.flags = AARCH64_MMU_DEVICE
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},
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{ /* RPI genet address */
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.begin = (unsigned)0xFD580000,
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.end = (unsigned)0xFD580000 + (unsigned)0x10000,
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.flags = AARCH64_MMU_DEVICE
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}
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};
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/*
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* Make weak and let the user override.
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*/
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BSP_START_TEXT_SECTION void
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raspberrypi_4_setup_mmu_and_cache( void ) __attribute__ ((weak));
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BSP_START_TEXT_SECTION void
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raspberrypi_4_setup_mmu_and_cache( void )
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{
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aarch64_mmu_control *control = &aarch64_mmu_instance;
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aarch64_mmu_setup();
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aarch64_mmu_setup_translation_table(
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control,
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&raspberrypi_4_mmu_config_table[ 0 ],
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RTEMS_ARRAY_SIZE( raspberrypi_4_mmu_config_table )
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);
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aarch64_mmu_enable( control );
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}
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BSP_START_TEXT_SECTION void rpi_setup_secondary_cpu_mmu_and_cache( void )
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__attribute__ ( ( weak ) );
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BSP_START_TEXT_SECTION void rpi_setup_secondary_cpu_mmu_and_cache( void )
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{
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aarch64_mmu_control *control = &aarch64_mmu_instance;
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/* Perform basic MMU setup */
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aarch64_mmu_setup();
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/* Use the existing root page table already configured by CPU0 */
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_AArch64_Write_ttbr0_el1( (uintptr_t) bsp_translation_table_base );
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aarch64_mmu_enable( control );
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}
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