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/**
* @file
*
* @ingroup RTEMSBSPsPowerPCQorIQ
*
* @brief BSP restart.
*/
/*
* Copyright (c) 2016, 2018 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@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.
*/
#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_count());
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 */
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