realview-pbx-a9/start/bspstarthooks.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (c) 2013 embedded brains GmbH & Co. KG
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #define ARM_CP15_TEXT_SECTION BSP_START_TEXT_SECTION
0029
0030 #include <bsp.h>
0031 #include <bsp/start.h>
0032 #include <bsp/arm-cp15-start.h>
0033 #include <bsp/arm-a9mpcore-start.h>
0034
0035 #ifdef RTEMS_SMP
0036 #include <rtems/score/smpimpl.h>
0037 #endif
0038
0039 BSP_START_DATA_SECTION static const arm_cp15_start_section_config
0040 rvpbxa9_mmu_config_table[] = {
0041   ARMV7_CP15_START_DEFAULT_SECTIONS,
0042   {
0043     .begin = 0x10000000U,
0044     .end = 0x10020000U,
0045     .flags = ARMV7_MMU_DEVICE
0046   }, {
0047     .begin = 0x1f000000U,
0048     .end = 0x20000000U,
0049     .flags = ARMV7_MMU_DEVICE
0050   }, {
0051     .begin = 0x4e000000U,
0052     .end = 0x4f000000U,
0053     .flags = ARMV7_MMU_DEVICE
0054   }
0055 };
0056
0057 BSP_START_TEXT_SECTION static void setup_mmu_and_cache(void)
0058 {
0059   uint32_t ctrl = arm_cp15_start_setup_mmu_and_cache(
0060     ARM_CP15_CTRL_A,
0061     ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_Z
0062   );
0063
0064   arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache(
0065     ctrl,
0066     (uint32_t *) bsp_translation_table_base,
0067     ARM_MMU_DEFAULT_CLIENT_DOMAIN,
0068     &rvpbxa9_mmu_config_table[0],
0069     RTEMS_ARRAY_SIZE(rvpbxa9_mmu_config_table)
0070   );
0071 }
0072
0073 BSP_START_TEXT_SECTION void bsp_start_hook_0(void)
0074 {
0075 #ifdef RTEMS_SMP
0076   uint32_t cpu_index_self = _SMP_Get_current_processor();
0077
0078   /*
0079    * QEMU jumps to the entry point of the ELF file on all processors.  Prevent
0080    * the fatal errors SMP_FATAL_MULTITASKING_START_ON_INVALID_PROCESSOR and
0081    * SMP_FATAL_MULTITASKING_START_ON_UNASSIGNED_PROCESSOR this way.
0082    */
0083   if (cpu_index_self != 0 && !_SMP_Should_start_processor(cpu_index_self)) {
0084     while (true) {
0085       _ARM_Wait_for_event();
0086     }
0087   }
0088 #endif
0089
0090   arm_a9mpcore_start_hook_0();
0091 }
0092
0093 BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
0094 {
0095   arm_a9mpcore_start_hook_1();
0096   bsp_start_copy_sections();
0097   setup_mmu_and_cache();
0098   bsp_start_clear_bss();
0099 }