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/*
* Copyright (c) 2013 embedded brains GmbH & Co. KG
*
* Copyright (c) 2014 Chris Johns. All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/start.h>
#include <bsp/arm-cp15-start.h>
#define ARM_SECTIONS 4096 /* all sections needed to describe the
virtual address space */
#define ARM_SECTION_SIZE (1024 * 1024) /* how much virtual memory is described
by one section */
//static uint32_t pagetable[ARM_SECTIONS] __attribute__((aligned (1024*16)));
BSP_START_DATA_SECTION static const arm_cp15_start_section_config
beagle_mmu_config_table[] = {
ARMV7_CP15_START_DEFAULT_SECTIONS,
{
.begin = 0x40000000U,
.end = 0x4FFFFFFFU,
.flags = ARMV7_MMU_DEVICE
}
};
/*
* Make weak and let the user override.
*/
BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void) __attribute__ ((weak));
BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void)
{
/* turn mmu off first in case it's on */
uint32_t ctrl = arm_cp15_start_setup_mmu_and_cache(
ARM_CP15_CTRL_M | ARM_CP15_CTRL_A, /* clear - mmu off */
ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_Z
);
arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache(
ctrl,
(uint32_t *) bsp_translation_table_base,
ARM_MMU_DEFAULT_CLIENT_DOMAIN,
&beagle_mmu_config_table[0],
RTEMS_ARRAY_SIZE(beagle_mmu_config_table)
);
}
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