hw/arm/raspi4b.c

   1 /*
   2  * Raspberry Pi 4B emulation
   3  *
   4  * Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #include "qemu/osdep.h"
  10 #include "qemu/units.h"
  11 #include "qemu/cutils.h"
  12 #include "qapi/error.h"
  13 #include "qapi/visitor.h"
  14 #include "hw/arm/raspi_platform.h"
  15 #include "hw/display/bcm2835_fb.h"
  16 #include "hw/registerfields.h"
  17 #include "qemu/error-report.h"
  18 #include "sysemu/device_tree.h"
  19 #include "hw/boards.h"
  20 #include "hw/loader.h"
  21 #include "hw/arm/boot.h"
  22 #include "qom/object.h"
  23 #include "hw/arm/bcm2838.h"
  24 #include <libfdt.h>
  25
  26 #define TYPE_RASPI4B_MACHINE MACHINE_TYPE_NAME("raspi4b")
  27 OBJECT_DECLARE_SIMPLE_TYPE(Raspi4bMachineState, RASPI4B_MACHINE)
  28
  29 struct Raspi4bMachineState {
  30     RaspiBaseMachineState parent_obj;
  31     BCM2838State soc;
  32 };
  33
  34 /*
  35  * Add second memory region if board RAM amount exceeds VC base address
  36  * (see https://datasheets.raspberrypi.com/bcm2711/bcm2711-peripherals.pdf
  37  * 1.2 Address Map)
  38  */
  39 static int raspi_add_memory_node(void *fdt, hwaddr mem_base, hwaddr mem_len)
  40 {
  41     int ret;
  42     uint32_t acells, scells;
  43     char *nodename = g_strdup_printf("/memory@%" PRIx64, mem_base);
  44
  45     acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells",
  46                                    NULL, &error_fatal);
  47     scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells",
  48                                    NULL, &error_fatal);
  49     if (acells == 0 || scells == 0) {
  50         fprintf(stderr, "dtb file invalid (#address-cells or #size-cells 0)\n");
  51         ret = -1;
  52     } else {
  53         qemu_fdt_add_subnode(fdt, nodename);
  54         qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
  55         ret = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg",
  56                                            acells, mem_base,
  57                                            scells, mem_len);
  58     }
  59
  60     g_free(nodename);
  61     return ret;
  62 }
  63
  64 static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt)
  65 {
  66     uint64_t ram_size;
  67
  68     /* Temporarily disable following devices until they are implemented */
  69     const char *nodes_to_remove[] = {
  70         "brcm,bcm2711-pcie",
  71         "brcm,bcm2711-rng200",
  72         "brcm,bcm2711-thermal",
  73         "brcm,bcm2711-genet-v5",
  74     };
  75
  76     for (int i = 0; i < ARRAY_SIZE(nodes_to_remove); i++) {
  77         const char *dev_str = nodes_to_remove[i];
  78
  79         int offset = fdt_node_offset_by_compatible(fdt, -1, dev_str);
  80         if (offset >= 0) {
  81             if (!fdt_nop_node(fdt, offset)) {
  82                 warn_report("bcm2711 dtc: %s has been disabled!", dev_str);
  83             }
  84         }
  85     }
  86
  87     ram_size = board_ram_size(info->board_id);
  88
  89     if (info->ram_size > UPPER_RAM_BASE) {
  90         raspi_add_memory_node(fdt, UPPER_RAM_BASE, ram_size - UPPER_RAM_BASE);
  91     }
  92 }
  93
  94 static void raspi4b_machine_init(MachineState *machine)
  95 {
  96     Raspi4bMachineState *s = RASPI4B_MACHINE(machine);
  97     RaspiBaseMachineState *s_base = RASPI_BASE_MACHINE(machine);
  98     RaspiBaseMachineClass *mc = RASPI_BASE_MACHINE_GET_CLASS(machine);
  99     BCM2838State *soc = &s->soc;
 100
 101     s_base->binfo.modify_dtb = raspi4_modify_dtb;
 102     s_base->binfo.board_id = mc->board_rev;
 103
 104     object_initialize_child(OBJECT(machine), "soc", soc,
 105                             board_soc_type(mc->board_rev));
 106
 107     raspi_base_machine_init(machine, &soc->parent_obj);
 108 }
 109
 110 static void raspi4b_machine_class_init(ObjectClass *oc, void *data)
 111 {
 112     MachineClass *mc = MACHINE_CLASS(oc);
 113     RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
 114
 115 #if HOST_LONG_BITS == 32
 116     rmc->board_rev = 0xa03111; /* Revision 1.1, 1 Gb RAM */
 117 #else
 118     rmc->board_rev = 0xb03115; /* Revision 1.5, 2 Gb RAM */
 119 #endif
 120     raspi_machine_class_common_init(mc, rmc->board_rev);
 121     mc->init = raspi4b_machine_init;
 122 }
 123
 124 static const TypeInfo raspi4b_machine_type = {
 125     .name           = TYPE_RASPI4B_MACHINE,
 126     .parent         = TYPE_RASPI_BASE_MACHINE,
 127     .instance_size  = sizeof(Raspi4bMachineState),
 128     .class_init     = raspi4b_machine_class_init,
 129 };
 130
 131 static void raspi4b_machine_register_type(void)
 132 {
 133     type_register_static(&raspi4b_machine_type);
 134 }
 135
 136 type_init(raspi4b_machine_register_type)