1 /* 2 * Bananapi M2U emulation 3 * 4 * Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.com> 5 * 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu/units.h" 22 #include "exec/address-spaces.h" 23 #include "qapi/error.h" 24 #include "qemu/error-report.h" 25 #include "hw/boards.h" 26 #include "hw/qdev-properties.h" 27 #include "hw/arm/allwinner-r40.h" 28 29 static struct arm_boot_info bpim2u_binfo; 30 31 /* 32 * R40 can boot from mmc0 and mmc2, and bpim2u has two mmc interface, one is 33 * connected to sdcard and another mount an emmc media. 34 * Attach the mmc driver and try loading bootloader. 35 */ 36 static void mmc_attach_drive(AwR40State *s, AwSdHostState *mmc, int unit, 37 bool load_bootroom, bool *bootroom_loaded) 38 { 39 DriveInfo *di = drive_get(IF_SD, 0, unit); 40 BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL; 41 BusState *bus; 42 DeviceState *carddev; 43 44 bus = qdev_get_child_bus(DEVICE(mmc), "sd-bus"); 45 if (bus == NULL) { 46 error_report("No SD bus found in SOC object"); 47 exit(1); 48 } 49 50 carddev = qdev_new(TYPE_SD_CARD); 51 qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal); 52 qdev_realize_and_unref(carddev, bus, &error_fatal); 53 54 if (load_bootroom && blk && blk_is_available(blk)) { 55 /* Use Boot ROM to copy data from SD card to SRAM */ 56 *bootroom_loaded = allwinner_r40_bootrom_setup(s, blk, unit); 57 } 58 } 59 60 static void bpim2u_init(MachineState *machine) 61 { 62 bool bootroom_loaded = false; 63 AwR40State *r40; 64 65 /* BIOS is not supported by this board */ 66 if (machine->firmware) { 67 error_report("BIOS not supported for this machine"); 68 exit(1); 69 } 70 71 /* Only allow Cortex-A7 for this board */ 72 if (strcmp(machine->cpu_type, ARM_CPU_TYPE_NAME("cortex-a7")) != 0) { 73 error_report("This board can only be used with cortex-a7 CPU"); 74 exit(1); 75 } 76 77 r40 = AW_R40(object_new(TYPE_AW_R40)); 78 object_property_add_child(OBJECT(machine), "soc", OBJECT(r40)); 79 object_unref(OBJECT(r40)); 80 81 /* Setup timer properties */ 82 object_property_set_int(OBJECT(r40), "clk0-freq", 32768, &error_abort); 83 object_property_set_int(OBJECT(r40), "clk1-freq", 24 * 1000 * 1000, 84 &error_abort); 85 86 /* Mark R40 object realized */ 87 qdev_realize(DEVICE(r40), NULL, &error_abort); 88 89 /* 90 * Plug in SD card and try load bootrom, R40 has 4 mmc controllers but can 91 * only booting from mmc0 and mmc2. 92 */ 93 for (int i = 0; i < AW_R40_NUM_MMCS; i++) { 94 switch (i) { 95 case 0: 96 case 2: 97 mmc_attach_drive(r40, &r40->mmc[i], i, 98 !machine->kernel_filename && !bootroom_loaded, 99 &bootroom_loaded); 100 break; 101 default: 102 mmc_attach_drive(r40, &r40->mmc[i], i, false, NULL); 103 break; 104 } 105 } 106 107 /* SDRAM */ 108 memory_region_add_subregion(get_system_memory(), 109 r40->memmap[AW_R40_DEV_SDRAM], machine->ram); 110 111 bpim2u_binfo.loader_start = r40->memmap[AW_R40_DEV_SDRAM]; 112 bpim2u_binfo.ram_size = machine->ram_size; 113 bpim2u_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC; 114 arm_load_kernel(ARM_CPU(first_cpu), machine, &bpim2u_binfo); 115 } 116 117 static void bpim2u_machine_init(MachineClass *mc) 118 { 119 mc->desc = "Bananapi M2U (Cortex-A7)"; 120 mc->init = bpim2u_init; 121 mc->min_cpus = AW_R40_NUM_CPUS; 122 mc->max_cpus = AW_R40_NUM_CPUS; 123 mc->default_cpus = AW_R40_NUM_CPUS; 124 mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a7"); 125 mc->default_ram_size = 1 * GiB; 126 mc->default_ram_id = "bpim2u.ram"; 127 } 128 129 DEFINE_MACHINE("bpim2u", bpim2u_machine_init) 130