summaryrefslogtreecommitdiffstats
path: root/bsps/powerpc/qoriq/start/bsprestart.c
blob: 228d74c23165be805a34c58475707d2d8ef2a5f6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/**
 * @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_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 */