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/*
* Bananapi M2U emulation
*
* Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "exec/address-spaces.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/boards.h"
#include "hw/qdev-properties.h"
#include "hw/arm/allwinner-r40.h"
static struct arm_boot_info bpim2u_binfo;
/*
* R40 can boot from mmc0 and mmc2, and bpim2u has two mmc interface, one is
* connected to sdcard and another mount an emmc media.
* Attach the mmc driver and try loading bootloader.
*/
static void mmc_attach_drive(AwR40State *s, AwSdHostState *mmc, int unit,
bool load_bootroom, bool *bootroom_loaded)
{
DriveInfo *di = drive_get(IF_SD, 0, unit);
BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL;
BusState *bus;
DeviceState *carddev;
bus = qdev_get_child_bus(DEVICE(mmc), "sd-bus");
if (bus == NULL) {
error_report("No SD bus found in SOC object");
exit(1);
}
carddev = qdev_new(TYPE_SD_CARD);
qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal);
qdev_realize_and_unref(carddev, bus, &error_fatal);
if (load_bootroom && blk && blk_is_available(blk)) {
/* Use Boot ROM to copy data from SD card to SRAM */
*bootroom_loaded = allwinner_r40_bootrom_setup(s, blk, unit);
}
}
static void bpim2u_init(MachineState *machine)
{
bool bootroom_loaded = false;
AwR40State *r40;
/* BIOS is not supported by this board */
if (machine->firmware) {
error_report("BIOS not supported for this machine");
exit(1);
}
/* Only allow Cortex-A7 for this board */
if (strcmp(machine->cpu_type, ARM_CPU_TYPE_NAME("cortex-a7")) != 0) {
error_report("This board can only be used with cortex-a7 CPU");
exit(1);
}
r40 = AW_R40(object_new(TYPE_AW_R40));
object_property_add_child(OBJECT(machine), "soc", OBJECT(r40));
object_unref(OBJECT(r40));
/* Setup timer properties */
object_property_set_int(OBJECT(r40), "clk0-freq", 32768, &error_abort);
object_property_set_int(OBJECT(r40), "clk1-freq", 24 * 1000 * 1000,
&error_abort);
/* Mark R40 object realized */
qdev_realize(DEVICE(r40), NULL, &error_abort);
/*
* Plug in SD card and try load bootrom, R40 has 4 mmc controllers but can
* only booting from mmc0 and mmc2.
*/
for (int i = 0; i < AW_R40_NUM_MMCS; i++) {
switch (i) {
case 0:
case 2:
mmc_attach_drive(r40, &r40->mmc[i], i,
!machine->kernel_filename && !bootroom_loaded,
&bootroom_loaded);
break;
default:
mmc_attach_drive(r40, &r40->mmc[i], i, false, NULL);
break;
}
}
/* SDRAM */
memory_region_add_subregion(get_system_memory(),
r40->memmap[AW_R40_DEV_SDRAM], machine->ram);
bpim2u_binfo.loader_start = r40->memmap[AW_R40_DEV_SDRAM];
bpim2u_binfo.ram_size = machine->ram_size;
bpim2u_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
arm_load_kernel(ARM_CPU(first_cpu), machine, &bpim2u_binfo);
}
static void bpim2u_machine_init(MachineClass *mc)
{
mc->desc = "Bananapi M2U (Cortex-A7)";
mc->init = bpim2u_init;
mc->min_cpus = AW_R40_NUM_CPUS;
mc->max_cpus = AW_R40_NUM_CPUS;
mc->default_cpus = AW_R40_NUM_CPUS;
mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a7");
mc->default_ram_size = 1 * GiB;
mc->default_ram_id = "bpim2u.ram";
}
DEFINE_MACHINE("bpim2u", bpim2u_machine_init)
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