hw/riscv/opentitan.c

   1 /*
   2  * QEMU RISC-V Board Compatible with OpenTitan FPGA platform
   3  *
   4  * Copyright (c) 2020 Western Digital
   5  *
   6  * Provides a board compatible with the OpenTitan FPGA platform:
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2 or later, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "hw/riscv/opentitan.h"
  23 #include "qapi/error.h"
  24 #include "hw/boards.h"
  25 #include "hw/misc/unimp.h"
  26 #include "hw/riscv/boot.h"
  27 #include "exec/address-spaces.h"
  28 #include "qemu/units.h"
  29 #include "sysemu/sysemu.h"
  30
  31 static const struct MemmapEntry {
  32     hwaddr base;
  33     hwaddr size;
  34 } ibex_memmap[] = {
  35     [IBEX_DEV_ROM] =            {  0x00008000, 16 * KiB },
  36     [IBEX_DEV_RAM] =            {  0x10000000,  0x10000 },
  37     [IBEX_DEV_FLASH] =          {  0x20000000,  0x80000 },
  38     [IBEX_DEV_UART] =           {  0x40000000,  0x10000 },
  39     [IBEX_DEV_GPIO] =           {  0x40010000,  0x10000 },
  40     [IBEX_DEV_SPI] =            {  0x40020000,  0x10000 },
  41     [IBEX_DEV_FLASH_CTRL] =     {  0x40030000,  0x10000 },
  42     [IBEX_DEV_PINMUX] =         {  0x40070000,  0x10000 },
  43     [IBEX_DEV_RV_TIMER] =       {  0x40080000,  0x10000 },
  44     [IBEX_DEV_PLIC] =           {  0x40090000,  0x10000 },
  45     [IBEX_DEV_PWRMGR] =         {  0x400A0000,  0x10000 },
  46     [IBEX_DEV_RSTMGR] =         {  0x400B0000,  0x10000 },
  47     [IBEX_DEV_CLKMGR] =         {  0x400C0000,  0x10000 },
  48     [IBEX_DEV_AES] =            {  0x40110000,  0x10000 },
  49     [IBEX_DEV_HMAC] =           {  0x40120000,  0x10000 },
  50     [IBEX_DEV_ALERT_HANDLER] =  {  0x40130000,  0x10000 },
  51     [IBEX_DEV_NMI_GEN] =        {  0x40140000,  0x10000 },
  52     [IBEX_DEV_USBDEV] =         {  0x40150000,  0x10000 },
  53     [IBEX_DEV_PADCTRL] =        {  0x40160000,  0x10000 }
  54 };
  55
  56 static void opentitan_board_init(MachineState *machine)
  57 {
  58     const struct MemmapEntry *memmap = ibex_memmap;
  59     OpenTitanState *s = g_new0(OpenTitanState, 1);
  60     MemoryRegion *sys_mem = get_system_memory();
  61     MemoryRegion *main_mem = g_new(MemoryRegion, 1);
  62
  63     /* Initialize SoC */
  64     object_initialize_child(OBJECT(machine), "soc", &s->soc,
  65                             TYPE_RISCV_IBEX_SOC);
  66     qdev_realize(DEVICE(&s->soc), NULL, &error_abort);
  67
  68     memory_region_init_ram(main_mem, NULL, "riscv.lowrisc.ibex.ram",
  69         memmap[IBEX_DEV_RAM].size, &error_fatal);
  70     memory_region_add_subregion(sys_mem,
  71         memmap[IBEX_DEV_RAM].base, main_mem);
  72
  73     if (machine->firmware) {
  74         riscv_load_firmware(machine->firmware, memmap[IBEX_DEV_RAM].base, NULL);
  75     }
  76
  77     if (machine->kernel_filename) {
  78         riscv_load_kernel(machine->kernel_filename,
  79                           memmap[IBEX_DEV_RAM].base, NULL);
  80     }
  81 }
  82
  83 static void opentitan_machine_init(MachineClass *mc)
  84 {
  85     mc->desc = "RISC-V Board compatible with OpenTitan";
  86     mc->init = opentitan_board_init;
  87     mc->max_cpus = 1;
  88     mc->default_cpu_type = TYPE_RISCV_CPU_IBEX;
  89 }
  90
  91 DEFINE_MACHINE("opentitan", opentitan_machine_init)
  92
  93 static void lowrisc_ibex_soc_init(Object *obj)
  94 {
  95     LowRISCIbexSoCState *s = RISCV_IBEX_SOC(obj);
  96
  97     object_initialize_child(obj, "cpus", &s->cpus, TYPE_RISCV_HART_ARRAY);
  98
  99     object_initialize_child(obj, "plic", &s->plic, TYPE_IBEX_PLIC);
 100
 101     object_initialize_child(obj, "uart", &s->uart, TYPE_IBEX_UART);
 102 }
 103
 104 static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
 105 {
 106     const struct MemmapEntry *memmap = ibex_memmap;
 107     MachineState *ms = MACHINE(qdev_get_machine());
 108     LowRISCIbexSoCState *s = RISCV_IBEX_SOC(dev_soc);
 109     MemoryRegion *sys_mem = get_system_memory();
 110
 111     object_property_set_str(OBJECT(&s->cpus), "cpu-type", ms->cpu_type,
 112                             &error_abort);
 113     object_property_set_int(OBJECT(&s->cpus), "num-harts", ms->smp.cpus,
 114                             &error_abort);
 115     object_property_set_int(OBJECT(&s->cpus), "resetvec", 0x8090, &error_abort);
 116     sysbus_realize(SYS_BUS_DEVICE(&s->cpus), &error_abort);
 117
 118     /* Boot ROM */
 119     memory_region_init_rom(&s->rom, OBJECT(dev_soc), "riscv.lowrisc.ibex.rom",
 120                            memmap[IBEX_DEV_ROM].size, &error_fatal);
 121     memory_region_add_subregion(sys_mem,
 122         memmap[IBEX_DEV_ROM].base, &s->rom);
 123
 124     /* Flash memory */
 125     memory_region_init_rom(&s->flash_mem, OBJECT(dev_soc), "riscv.lowrisc.ibex.flash",
 126                            memmap[IBEX_DEV_FLASH].size, &error_fatal);
 127     memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH].base,
 128                                 &s->flash_mem);
 129
 130     /* PLIC */
 131     if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
 132         return;
 133     }
 134     sysbus_mmio_map(SYS_BUS_DEVICE(&s->plic), 0, memmap[IBEX_DEV_PLIC].base);
 135
 136     /* UART */
 137     qdev_prop_set_chr(DEVICE(&(s->uart)), "chardev", serial_hd(0));
 138     if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart), errp)) {
 139         return;
 140     }
 141     sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart), 0, memmap[IBEX_DEV_UART].base);
 142     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 143                        0, qdev_get_gpio_in(DEVICE(&s->plic),
 144                        IBEX_UART_TX_WATERMARK_IRQ));
 145     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 146                        1, qdev_get_gpio_in(DEVICE(&s->plic),
 147                        IBEX_UART_RX_WATERMARK_IRQ));
 148     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 149                        2, qdev_get_gpio_in(DEVICE(&s->plic),
 150                        IBEX_UART_TX_EMPTY_IRQ));
 151     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 152                        3, qdev_get_gpio_in(DEVICE(&s->plic),
 153                        IBEX_UART_RX_OVERFLOW_IRQ));
 154
 155     create_unimplemented_device("riscv.lowrisc.ibex.gpio",
 156         memmap[IBEX_DEV_GPIO].base, memmap[IBEX_DEV_GPIO].size);
 157     create_unimplemented_device("riscv.lowrisc.ibex.spi",
 158         memmap[IBEX_DEV_SPI].base, memmap[IBEX_DEV_SPI].size);
 159     create_unimplemented_device("riscv.lowrisc.ibex.flash_ctrl",
 160         memmap[IBEX_DEV_FLASH_CTRL].base, memmap[IBEX_DEV_FLASH_CTRL].size);
 161     create_unimplemented_device("riscv.lowrisc.ibex.rv_timer",
 162         memmap[IBEX_DEV_RV_TIMER].base, memmap[IBEX_DEV_RV_TIMER].size);
 163     create_unimplemented_device("riscv.lowrisc.ibex.pwrmgr",
 164         memmap[IBEX_DEV_PWRMGR].base, memmap[IBEX_DEV_PWRMGR].size);
 165     create_unimplemented_device("riscv.lowrisc.ibex.rstmgr",
 166         memmap[IBEX_DEV_RSTMGR].base, memmap[IBEX_DEV_RSTMGR].size);
 167     create_unimplemented_device("riscv.lowrisc.ibex.clkmgr",
 168         memmap[IBEX_DEV_CLKMGR].base, memmap[IBEX_DEV_CLKMGR].size);
 169     create_unimplemented_device("riscv.lowrisc.ibex.aes",
 170         memmap[IBEX_DEV_AES].base, memmap[IBEX_DEV_AES].size);
 171     create_unimplemented_device("riscv.lowrisc.ibex.hmac",
 172         memmap[IBEX_DEV_HMAC].base, memmap[IBEX_DEV_HMAC].size);
 173     create_unimplemented_device("riscv.lowrisc.ibex.pinmux",
 174         memmap[IBEX_DEV_PINMUX].base, memmap[IBEX_DEV_PINMUX].size);
 175     create_unimplemented_device("riscv.lowrisc.ibex.alert_handler",
 176         memmap[IBEX_DEV_ALERT_HANDLER].base, memmap[IBEX_DEV_ALERT_HANDLER].size);
 177     create_unimplemented_device("riscv.lowrisc.ibex.nmi_gen",
 178         memmap[IBEX_DEV_NMI_GEN].base, memmap[IBEX_DEV_NMI_GEN].size);
 179     create_unimplemented_device("riscv.lowrisc.ibex.usbdev",
 180         memmap[IBEX_DEV_USBDEV].base, memmap[IBEX_DEV_USBDEV].size);
 181     create_unimplemented_device("riscv.lowrisc.ibex.padctrl",
 182         memmap[IBEX_DEV_PADCTRL].base, memmap[IBEX_DEV_PADCTRL].size);
 183 }
 184
 185 static void lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
 186 {
 187     DeviceClass *dc = DEVICE_CLASS(oc);
 188
 189     dc->realize = lowrisc_ibex_soc_realize;
 190     /* Reason: Uses serial_hds in realize function, thus can't be used twice */
 191     dc->user_creatable = false;
 192 }
 193
 194 static const TypeInfo lowrisc_ibex_soc_type_info = {
 195     .name = TYPE_RISCV_IBEX_SOC,
 196     .parent = TYPE_DEVICE,
 197     .instance_size = sizeof(LowRISCIbexSoCState),
 198     .instance_init = lowrisc_ibex_soc_init,
 199     .class_init = lowrisc_ibex_soc_class_init,
 200 };
 201
 202 static void lowrisc_ibex_soc_register_types(void)
 203 {
 204     type_register_static(&lowrisc_ibex_soc_type_info);
 205 }
 206
 207 type_init(lowrisc_ibex_soc_register_types)