source: rtems/bsps/arm/realview-pbx-a9/start/bspstarthooks.c @ 1b57b75

/*
 * Copyright (c) 2013 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <info@embedded-brains.de>
 *
 * 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.
 */

#define ARM_CP15_TEXT_SECTION BSP_START_TEXT_SECTION

#include <bsp.h>
#include <bsp/start.h>
#include <bsp/arm-cp15-start.h>
#include <bsp/arm-a9mpcore-start.h>

#ifdef RTEMS_SMP
#include <rtems/score/smpimpl.h>
#endif

BSP_START_DATA_SECTION static const arm_cp15_start_section_config
rvpbxa9_mmu_config_table[] = {
  ARMV7_CP15_START_DEFAULT_SECTIONS,
  {
    .begin = 0x10000000U,
    .end = 0x10020000U,
    .flags = ARMV7_MMU_DEVICE
  }, {
    .begin = 0x1f000000U,
    .end = 0x20000000U,
    .flags = ARMV7_MMU_DEVICE
  }, {
    .begin = 0x4e000000U,
    .end = 0x4f000000U,
    .flags = ARMV7_MMU_DEVICE
  }
};

BSP_START_TEXT_SECTION static void setup_mmu_and_cache(void)
{
  uint32_t ctrl = arm_cp15_start_setup_mmu_and_cache(
    ARM_CP15_CTRL_A,
    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,
    &rvpbxa9_mmu_config_table[0],
    RTEMS_ARRAY_SIZE(rvpbxa9_mmu_config_table)
  );
}

BSP_START_TEXT_SECTION void bsp_start_hook_0(void)
{
#ifdef RTEMS_SMP
  uint32_t cpu_index_self = _SMP_Get_current_processor();

  /*
   * QEMU jumps to the entry point of the ELF file on all processors.  Prevent
   * the fatal errors SMP_FATAL_MULTITASKING_START_ON_INVALID_PROCESSOR and
   * SMP_FATAL_MULTITASKING_START_ON_UNASSIGNED_PROCESSOR this way.
   */
  if (
    cpu_index_self >= rtems_configuration_get_maximum_processors()
      || !_SMP_Should_start_processor(cpu_index_self)
  ) {
    while (true) {
      _ARM_Wait_for_event();
    }
  }
#endif

  arm_a9mpcore_start_hook_0();
}

BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
{
  arm_a9mpcore_start_hook_1();
  bsp_start_copy_sections();
  setup_mmu_and_cache();
  bsp_start_clear_bss();
}