/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsPowerPCQorIQ
*
* @brief BSP restart.
*/
/*
* Copyright (c) 2016, 2018 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.
*/
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/fatal.h>
#include <bsp/fdt.h>
#include <bsp/linker-symbols.h>
#include <bsp/qoriq.h>
#include <libcpu/powerpc-utility.h>
#include <string.h>
static char fdt_copy[BSP_FDT_BLOB_SIZE_MAX];
static RTEMS_NO_RETURN void do_restart(void *addr)
{
void (*restart)(uintptr_t);
qoriq_reset_qman_and_bman();
memcpy(fdt_copy, bsp_fdt_get(), sizeof(fdt_copy));
rtems_cache_flush_multiple_data_lines(fdt_copy, sizeof(fdt_copy));
restart = addr;
(*restart)((uintptr_t) fdt_copy);
bsp_fatal(QORIQ_FATAL_RESTART_FAILED);
}
#if defined(RTEMS_SMP) && !defined(QORIQ_IS_HYPERVISOR_GUEST)
#include <rtems/score/smpimpl.h>
#include <rtems/score/smpbarrier.h>
#define RESTART_IPI_INDEX 1
static SMP_barrier_Control restart_barrier = SMP_BARRIER_CONTROL_INITIALIZER;
static void restart_interrupt(void *arg)
{
uint32_t cpu_self_index;
uint32_t thread_index;
rtems_interrupt_level level;
SMP_barrier_State bs;
rtems_interrupt_local_disable(level);
(void) level;
_SMP_barrier_State_initialize(&bs);
_SMP_barrier_Wait(&restart_barrier, &bs, _SMP_Get_processor_maximum());
cpu_self_index = rtems_scheduler_get_processor();
thread_index = cpu_self_index % QORIQ_THREAD_COUNT;
if (cpu_self_index == 0) {
do_restart(arg);
} else if (thread_index == 0) {
uint32_t real_processor_index;
const qoriq_start_spin_table *spin_table;
real_processor_index = cpu_self_index / QORIQ_THREAD_COUNT;
spin_table = qoriq_start_spin_table_addr[real_processor_index];
qoriq_restart_secondary_processor(spin_table);
} else {
uint32_t pir_reset_value;
/* Restore reset PIR value */
pir_reset_value = (cpu_self_index & ~0x1U) << 2;
PPC_SET_SPECIAL_PURPOSE_REGISTER(BOOKE_PIR, pir_reset_value);
/* Thread Enable Clear (TENC) */
PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_TENC, 1U << thread_index);
RTEMS_UNREACHABLE();
}
}
static void raise_restart_interrupt(void)
{
qoriq.pic.ipidr[RESTART_IPI_INDEX].reg =
_Processor_mask_To_uint32_t(_SMP_Get_online_processors(), 0);
ppc_synchronize_data();
ppc_synchronize_instructions();
}
void bsp_restart(void *addr)
{
rtems_status_code sc;
size_t i;
for (i = 0; i < RTEMS_ARRAY_SIZE(qoriq_start_spin_table_addr); ++i) {
qoriq_start_spin_table *spin_table;
spin_table = qoriq_start_spin_table_addr[i];
memset(spin_table, 0, sizeof(*spin_table));
rtems_cache_flush_multiple_data_lines(spin_table, sizeof(*spin_table));
}
sc = rtems_interrupt_handler_install(
QORIQ_IRQ_IPI_0 + RESTART_IPI_INDEX,
"Restart",
RTEMS_INTERRUPT_UNIQUE,
restart_interrupt,
addr
);
if (sc != RTEMS_SUCCESSFUL) {
bsp_fatal(QORIQ_FATAL_RESTART_INSTALL_INTERRUPT);
}
raise_restart_interrupt();
bsp_fatal(QORIQ_FATAL_RESTART_INTERRUPT_FAILED);
}
#else /* !RTEMS_SMP || QORIQ_IS_HYPERVISOR_GUEST */
void bsp_restart(void *addr)
{
rtems_interrupt_level level;
rtems_interrupt_local_disable(level);
(void) level;
do_restart(addr);
}
#endif /* RTEMS_SMP && !QORIQ_IS_HYPERVISOR_GUEST */
