forked from Imagelibrary/rtems
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* Copyright (c) 2013 embedded brains GmbH & Co. KG
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*
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* Copyright (c) 2014 Chris Johns. All rights reserved.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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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/arm-cp15-start.h>
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#define ARM_SECTIONS 4096 /* all sections needed to describe the
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virtual address space */
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#define ARM_SECTION_SIZE (1024 * 1024) /* how much virtual memory is described
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by one section */
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//static uint32_t pagetable[ARM_SECTIONS] __attribute__((aligned (1024*16)));
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BSP_START_DATA_SECTION static const arm_cp15_start_section_config
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beagle_mmu_config_table[] = {
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ARMV7_CP15_START_DEFAULT_SECTIONS,
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{
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.begin = 0x40000000U,
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.end = 0x4FFFFFFFU,
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.flags = ARMV7_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 beagle_setup_mmu_and_cache(void) __attribute__ ((weak));
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BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void)
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{
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/* turn mmu off first in case it's on */
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uint32_t ctrl = arm_cp15_start_setup_mmu_and_cache(
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ARM_CP15_CTRL_M | ARM_CP15_CTRL_A, /* clear - mmu off */
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ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_Z
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);
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arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache(
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ctrl,
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(uint32_t *) bsp_translation_table_base,
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ARM_MMU_DEFAULT_CLIENT_DOMAIN,
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&beagle_mmu_config_table[0],
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RTEMS_ARRAY_SIZE(beagle_mmu_config_table)
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);
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}
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