/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsARMShared
*
* @brief A9MPCORE_START Support
*/
/*
* Copyright (c) 2013-2014 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LIBBSP_ARM_SHARED_ARM_A9MPCORE_START_H
#define LIBBSP_ARM_SHARED_ARM_A9MPCORE_START_H
#include <rtems/score/smpimpl.h>
#include <libcpu/arm-cp15.h>
#include <bsp.h>
#include <bsp/start.h>
#include <bsp/arm-a9mpcore-regs.h>
#include <bsp/arm-cp15-start.h>
#include <bsp/arm-errata.h>
#include <dev/irq/arm-gic-irq.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
BSP_START_TEXT_SECTION static inline void arm_a9mpcore_start_scu_invalidate(
volatile a9mpcore_scu *scu,
uint32_t cpu_id,
uint32_t ways
)
{
scu->invss = (ways & 0xf) << ((cpu_id & 0x3) * 4);
}
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_errata_764369_handler(volatile a9mpcore_scu *scu)
{
if (arm_errata_is_applicable_processor_errata_764369()) {
scu->diagn_ctrl |= A9MPCORE_SCU_DIAGN_CTRL_MIGRATORY_BIT_DISABLE;
}
}
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_scu_enable(volatile a9mpcore_scu *scu)
{
scu->ctrl |= A9MPCORE_SCU_CTRL_SCU_EN;
arm_a9mpcore_start_errata_764369_handler(scu);
}
#ifdef RTEMS_SMP
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_on_secondary_processor(void)
{
uint32_t ctrl;
arm_gic_irq_initialize_secondary_cpu();
/* Change the VBAR from the start to the normal vector table */
arm_cp15_set_vector_base_address(bsp_vector_table_begin);
ctrl = arm_cp15_start_setup_mmu_and_cache(
0,
ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_Z
);
arm_cp15_set_domain_access_control(
ARM_CP15_DAC_DOMAIN(ARM_MMU_DEFAULT_CLIENT_DOMAIN, ARM_CP15_DAC_CLIENT)
);
/* FIXME: Sharing the translation table between processors is brittle */
arm_cp15_set_translation_table_base(
(uint32_t *) bsp_translation_table_base
);
ctrl |= ARM_CP15_CTRL_I | ARM_CP15_CTRL_C | ARM_CP15_CTRL_M;
arm_cp15_set_control(ctrl);
_SMP_Start_multitasking_on_secondary_processor(_Per_CPU_Get());
}
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_enable_smp_in_auxiliary_control(void)
{
/*
* Enable cache coherency support and cache/MMU maintenance broadcasts for
* this processor.
*/
uint32_t actlr = arm_cp15_get_auxiliary_control();
actlr |= ARM_CORTEX_A9_ACTL_SMP | ARM_CORTEX_A9_ACTL_FW;
arm_cp15_set_auxiliary_control(actlr);
}
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_errata_794072_handler(void)
{
uint32_t diag;
/*
* Workaround for Errata 794072: A short loop including a DMB instruction
* might cause a denial of service on another which executes a CP15 broadcast
* operation.
*/
diag = arm_cp15_get_diagnostic_control();
diag |= 1U << 4;
arm_cp15_set_diagnostic_control(diag);
}
BSP_START_TEXT_SECTION static inline void
arm_a9mpcore_start_errata_845369_handler(void)
{
uint32_t diag;
/*
* Workaround for Errata 845369: Under Very Rare Timing Circumstances
* Transition into Streaming Mode Might Create Data Corruption.
*/
diag = arm_cp15_get_diagnostic_control();
diag |= 1U << 22;
arm_cp15_set_diagnostic_control(diag);
}
#endif
BSP_START_TEXT_SECTION static inline void arm_a9mpcore_start_hook_0(void)
{
volatile a9mpcore_scu *scu =
(volatile a9mpcore_scu *) BSP_ARM_A9MPCORE_SCU_BASE;
uint32_t cpu_id = arm_cortex_a9_get_multiprocessor_cpu_id();
if (cpu_id == 0) {
arm_a9mpcore_start_scu_enable(scu);
}
#ifdef RTEMS_SMP
arm_a9mpcore_start_errata_794072_handler();
arm_a9mpcore_start_errata_845369_handler();
arm_a9mpcore_start_enable_smp_in_auxiliary_control();
#endif
arm_a9mpcore_start_scu_invalidate(scu, cpu_id, 0xf);
#ifdef RTEMS_SMP
if (cpu_id != 0) {
arm_a9mpcore_start_on_secondary_processor();
}
#endif
}
BSP_START_TEXT_SECTION static inline void arm_a9mpcore_start_global_timer(void)
{
volatile a9mpcore_gt *gt = (volatile a9mpcore_gt *) BSP_ARM_A9MPCORE_GT_BASE;
gt->ctrl = 0;
gt->cntrlower = 0;
gt->cntrupper = 0;
gt->ctrl = A9MPCORE_GT_CTRL_TMR_EN;
}
BSP_START_TEXT_SECTION static inline void arm_a9mpcore_start_hook_1(void)
{
arm_a9mpcore_start_global_timer();
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBBSP_ARM_SHARED_ARM_A9MPCORE_START_H */
