一、概述
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RZT2M双核架构是同构多核，但双核针对不同应用
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扩展多核架构和通信知识可参见嵌入式科普(30)一文看懂嵌入式MCU/MPU多核架构与通信
二、参考资料
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用户手册：RZ/T2M Group User's Manual: Hardware
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R52内核手册：arm_cortex_r52_processor_trm
三、RZT2M双核架构和通信
3.1 R52内核GIC-SCI
3.2 RZT2M信号量
3.3 架构通信示意图
fsp_err_t R_SHARED_MEMORY_Read (shared_memory_ctrl_t * const p_ctrl,uint8_t * const p_dest,uint32_t const offset,uint32_t const bytes)
{shared_memory_instance_ctrl_t * p_instance_ctrl = (shared_memory_instance_ctrl_t *) p_ctrl;volatile uint32_t resource_status = 0;#if SHARED_MEMORY_CFG_PARAM_CHECKING_ENABLEFSP_ASSERT(p_instance_ctrl != NULL);FSP_ASSERT(p_dest != NULL);/* Return an error if this module have already been opened */FSP_ERROR_RETURN(SHARED_MEMORY_OPEN == p_instance_ctrl->open, FSP_ERR_NOT_OPEN);
#endifif ((p_instance_ctrl->p_cfg->memory_size < (offset + bytes)) || (p_instance_ctrl->p_cfg->memory_size < offset) ||(p_instance_ctrl->p_cfg->memory_size < bytes)){return FSP_ERR_INVALID_ARGUMENT;}resource_status = r_shared_memory_read_resource_status(p_instance_ctrl->p_cfg->semaphore_reg);if (0x00000000 == resource_status) // wait Shared memory available{return FSP_ERR_IN_USE;}memcpy(p_dest, &p_instance_ctrl->p_cfg->p_memory[offset], bytes);r_shared_memory_release_resource(p_instance_ctrl->p_cfg->semaphore_reg); // Shared memory becomes availableif (SHARED_MEMORY_STATE_READY_TO_READ_WRITE == p_instance_ctrl->state){p_instance_ctrl->state = SHARED_MEMORY_STATE_READY_TO_WRITE;}return FSP_SUCCESS;
}/******************************************************************************************************************//*** Performs a write to the shared memory. Implements @ref shared_memory_api_t::write().** @retval FSP_SUCCESS Function executed without issue.* @retval FSP_ERR_ASSERTION p_ctrl or p_src is NULL.* @retval FSP_ERR_INVALID_ARGUMENT Invalid input parameter.* @retval FSP_ERR_IN_USE Another transfer was in progress.* @retval FSP_ERR_NOT_OPEN Module is not open.*********************************************************************************************************************/
fsp_err_t R_SHARED_MEMORY_Write (shared_memory_ctrl_t * const p_ctrl,uint8_t * const p_src,uint32_t const offset,uint32_t const bytes)
{shared_memory_instance_ctrl_t * p_instance_ctrl = (shared_memory_instance_ctrl_t *) p_ctrl;volatile uint32_t resource_status = 0;#if SHARED_MEMORY_CFG_PARAM_CHECKING_ENABLEFSP_ASSERT(p_instance_ctrl != NULL);FSP_ASSERT(p_src != NULL);/* Return an error if this module have already been opened */FSP_ERROR_RETURN(SHARED_MEMORY_OPEN == p_instance_ctrl->open, FSP_ERR_NOT_OPEN);
#endificu_inter_cpu_irq_instance_t * p_software_int_tx =(icu_inter_cpu_irq_instance_t *) ((shared_memory_extended_cfg_t *) p_instance_ctrl->p_cfg->p_extend)->p_software_int_tx;if ((p_instance_ctrl->p_cfg->memory_size < (offset + bytes)) || (p_instance_ctrl->p_cfg->memory_size < offset) ||(p_instance_ctrl->p_cfg->memory_size < bytes)){return FSP_ERR_INVALID_ARGUMENT;}resource_status = r_shared_memory_read_resource_status(p_instance_ctrl->p_cfg->semaphore_reg);if (0x00000000 == resource_status) // wait Shared memory available{return FSP_ERR_IN_USE;}memcpy(&p_instance_ctrl->p_cfg->p_memory[offset], p_src, bytes);__asm("dmb sy"); /*Ensuring data-changing */r_shared_memory_release_resource(p_instance_ctrl->p_cfg->semaphore_reg); // Shared memory becomes availablep_software_int_tx->p_api->generate(p_software_int_tx->p_ctrl);return FSP_SUCCESS;
}
四、双核工程
使用e2studio 2024-10 RZN-fsp2.2.0，可以直接新建向导RZT2M双核工程。小于等于2.0版本不可。
4.1 CPU1工程设置
arm-none-eabi-objcopy -I elf32-littlearm -O binary ${ProjName}.elf secondary.bin && arm-none-eabi-objcopy -I binary -O elf32-littlearm -B arm --rename-section .data=.secondary,alloc,data,readonly,load,contents secondary.bin secondary.o
4.2 CPU0工程设置
"${workspace_loc:/rzt2m_coremark_fsp220_cpu1/Debug/secondary.o}"
4.3 工程编译
4.4 双核启动
五、总结
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RZT2M同构双核，分主副core
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两个工程关联在一起(fsp2.2.0)
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先启动cpu0，后启动cpu1(fsp2.2.0)
