bf1da4b308
This commit adds RPi4B device tree modifications: - disable pcie, rng200, thermal sensor and genet devices (they're going to be re-enabled in the following commits) - create additional memory region in device tree if RAM amount exceeds VC base address. Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20240226000259.2752893-12-sergey.kambalin@auriga.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/*
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* Raspberry Pi 4B emulation
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*
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* Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "qemu/cutils.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "hw/arm/raspi_platform.h"
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#include "hw/display/bcm2835_fb.h"
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#include "hw/registerfields.h"
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#include "qemu/error-report.h"
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#include "sysemu/device_tree.h"
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#include "hw/boards.h"
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#include "hw/loader.h"
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#include "hw/arm/boot.h"
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#include "qom/object.h"
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#include "hw/arm/bcm2838.h"
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#include <libfdt.h>
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#define TYPE_RASPI4B_MACHINE MACHINE_TYPE_NAME("raspi4b")
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OBJECT_DECLARE_SIMPLE_TYPE(Raspi4bMachineState, RASPI4B_MACHINE)
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struct Raspi4bMachineState {
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RaspiBaseMachineState parent_obj;
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BCM2838State soc;
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};
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/*
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* Add second memory region if board RAM amount exceeds VC base address
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* (see https://datasheets.raspberrypi.com/bcm2711/bcm2711-peripherals.pdf
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* 1.2 Address Map)
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*/
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static int raspi_add_memory_node(void *fdt, hwaddr mem_base, hwaddr mem_len)
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{
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int ret;
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uint32_t acells, scells;
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char *nodename = g_strdup_printf("/memory@%" PRIx64, mem_base);
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acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells",
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NULL, &error_fatal);
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scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells",
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NULL, &error_fatal);
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if (acells == 0 || scells == 0) {
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fprintf(stderr, "dtb file invalid (#address-cells or #size-cells 0)\n");
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ret = -1;
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} else {
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qemu_fdt_add_subnode(fdt, nodename);
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qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
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ret = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg",
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acells, mem_base,
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scells, mem_len);
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}
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g_free(nodename);
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return ret;
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}
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static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt)
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{
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uint64_t ram_size;
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/* Temporarily disable following devices until they are implemented */
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const char *nodes_to_remove[] = {
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"brcm,bcm2711-pcie",
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"brcm,bcm2711-rng200",
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"brcm,bcm2711-thermal",
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"brcm,bcm2711-genet-v5",
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};
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for (int i = 0; i < ARRAY_SIZE(nodes_to_remove); i++) {
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const char *dev_str = nodes_to_remove[i];
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int offset = fdt_node_offset_by_compatible(fdt, -1, dev_str);
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if (offset >= 0) {
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if (!fdt_nop_node(fdt, offset)) {
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warn_report("bcm2711 dtc: %s has been disabled!", dev_str);
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}
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}
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}
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ram_size = board_ram_size(info->board_id);
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if (info->ram_size > UPPER_RAM_BASE) {
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raspi_add_memory_node(fdt, UPPER_RAM_BASE, ram_size - UPPER_RAM_BASE);
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}
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}
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static void raspi4b_machine_init(MachineState *machine)
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{
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Raspi4bMachineState *s = RASPI4B_MACHINE(machine);
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RaspiBaseMachineState *s_base = RASPI_BASE_MACHINE(machine);
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RaspiBaseMachineClass *mc = RASPI_BASE_MACHINE_GET_CLASS(machine);
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BCM2838State *soc = &s->soc;
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s_base->binfo.modify_dtb = raspi4_modify_dtb;
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s_base->binfo.board_id = mc->board_rev;
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object_initialize_child(OBJECT(machine), "soc", soc,
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board_soc_type(mc->board_rev));
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raspi_base_machine_init(machine, &soc->parent_obj);
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}
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static void raspi4b_machine_class_init(ObjectClass *oc, void *data)
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{
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MachineClass *mc = MACHINE_CLASS(oc);
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RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc);
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rmc->board_rev = 0xb03115; /* Revision 1.5, 2 Gb RAM */
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raspi_machine_class_common_init(mc, rmc->board_rev);
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mc->init = raspi4b_machine_init;
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}
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static const TypeInfo raspi4b_machine_type = {
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.name = TYPE_RASPI4B_MACHINE,
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.parent = TYPE_RASPI_BASE_MACHINE,
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.instance_size = sizeof(Raspi4bMachineState),
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.class_init = raspi4b_machine_class_init,
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};
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static void raspi4b_machine_register_type(void)
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{
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type_register_static(&raspi4b_machine_type);
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}
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type_init(raspi4b_machine_register_type)
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