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_ROM] =            {  0x00008000, 16 * KiB },
  36     [IBEX_RAM] =            {  0x10000000,  0x10000 },
  37     [IBEX_FLASH] =          {  0x20000000,  0x80000 },
  38     [IBEX_UART] =           {  0x40000000,  0x10000 },
  39     [IBEX_GPIO] =           {  0x40010000,  0x10000 },
  40     [IBEX_SPI] =            {  0x40020000,  0x10000 },
  41     [IBEX_FLASH_CTRL] =     {  0x40030000,  0x10000 },
  42     [IBEX_PINMUX] =         {  0x40070000,  0x10000 },
  43     [IBEX_RV_TIMER] =       {  0x40080000,  0x10000 },
  44     [IBEX_PLIC] =           {  0x40090000,  0x10000 },
  45     [IBEX_PWRMGR] =         {  0x400A0000,  0x10000 },
  46     [IBEX_RSTMGR] =         {  0x400B0000,  0x10000 },
  47     [IBEX_CLKMGR] =         {  0x400C0000,  0x10000 },
  48     [IBEX_AES] =            {  0x40110000,  0x10000 },
  49     [IBEX_HMAC] =           {  0x40120000,  0x10000 },
  50     [IBEX_ALERT_HANDLER] =  {  0x40130000,  0x10000 },
  51     [IBEX_NMI_GEN] =        {  0x40140000,  0x10000 },
  52     [IBEX_USBDEV] =         {  0x40150000,  0x10000 },
  53     [IBEX_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_RAM].size, &error_fatal);
  70     memory_region_add_subregion(sys_mem,
  71         memmap[IBEX_RAM].base, main_mem);
  72
  73     if (machine->firmware) {
  74         riscv_load_firmware(machine->firmware, memmap[IBEX_RAM].base, NULL);
  75     }
  76
  77     if (machine->kernel_filename) {
  78         riscv_load_kernel(machine->kernel_filename, NULL);
  79     }
  80 }
  81
  82 static void opentitan_machine_init(MachineClass *mc)
  83 {
  84     mc->desc = "RISC-V Board compatible with OpenTitan";
  85     mc->init = opentitan_board_init;
  86     mc->max_cpus = 1;
  87     mc->default_cpu_type = TYPE_RISCV_CPU_IBEX;
  88 }
  89
  90 DEFINE_MACHINE("opentitan", opentitan_machine_init)
  91
  92 static void lowrisc_ibex_soc_init(Object *obj)
  93 {
  94     LowRISCIbexSoCState *s = RISCV_IBEX_SOC(obj);
  95
  96     object_initialize_child(obj, "cpus", &s->cpus, TYPE_RISCV_HART_ARRAY);
  97
  98     object_initialize_child(obj, "plic", &s->plic, TYPE_IBEX_PLIC);
  99
 100     object_initialize_child(obj, "uart", &s->uart, TYPE_IBEX_UART);
 101 }
 102
 103 static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
 104 {
 105     const struct MemmapEntry *memmap = ibex_memmap;
 106     MachineState *ms = MACHINE(qdev_get_machine());
 107     LowRISCIbexSoCState *s = RISCV_IBEX_SOC(dev_soc);
 108     MemoryRegion *sys_mem = get_system_memory();
 109
 110     object_property_set_str(OBJECT(&s->cpus), "cpu-type", ms->cpu_type,
 111                             &error_abort);
 112     object_property_set_int(OBJECT(&s->cpus), "num-harts", ms->smp.cpus,
 113                             &error_abort);
 114     sysbus_realize(SYS_BUS_DEVICE(&s->cpus), &error_abort);
 115
 116     /* Boot ROM */
 117     memory_region_init_rom(&s->rom, OBJECT(dev_soc), "riscv.lowrisc.ibex.rom",
 118                            memmap[IBEX_ROM].size, &error_fatal);
 119     memory_region_add_subregion(sys_mem,
 120         memmap[IBEX_ROM].base, &s->rom);
 121
 122     /* Flash memory */
 123     memory_region_init_rom(&s->flash_mem, OBJECT(dev_soc), "riscv.lowrisc.ibex.flash",
 124                            memmap[IBEX_FLASH].size, &error_fatal);
 125     memory_region_add_subregion(sys_mem, memmap[IBEX_FLASH].base,
 126                                 &s->flash_mem);
 127
 128     /* PLIC */
 129     if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
 130         return;
 131     }
 132     sysbus_mmio_map(SYS_BUS_DEVICE(&s->plic), 0, memmap[IBEX_PLIC].base);
 133
 134     /* UART */
 135     qdev_prop_set_chr(DEVICE(&(s->uart)), "chardev", serial_hd(0));
 136     if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart), errp)) {
 137         return;
 138     }
 139     sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart), 0, memmap[IBEX_UART].base);
 140     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 141                        0, qdev_get_gpio_in(DEVICE(&s->plic),
 142                        IBEX_UART_TX_WATERMARK_IRQ));
 143     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 144                        1, qdev_get_gpio_in(DEVICE(&s->plic),
 145                        IBEX_UART_RX_WATERMARK_IRQ));
 146     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 147                        2, qdev_get_gpio_in(DEVICE(&s->plic),
 148                        IBEX_UART_TX_EMPTY_IRQ));
 149     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
 150                        3, qdev_get_gpio_in(DEVICE(&s->plic),
 151                        IBEX_UART_RX_OVERFLOW_IRQ));
 152
 153     create_unimplemented_device("riscv.lowrisc.ibex.gpio",
 154         memmap[IBEX_GPIO].base, memmap[IBEX_GPIO].size);
 155     create_unimplemented_device("riscv.lowrisc.ibex.spi",
 156         memmap[IBEX_SPI].base, memmap[IBEX_SPI].size);
 157     create_unimplemented_device("riscv.lowrisc.ibex.flash_ctrl",
 158         memmap[IBEX_FLASH_CTRL].base, memmap[IBEX_FLASH_CTRL].size);
 159     create_unimplemented_device("riscv.lowrisc.ibex.rv_timer",
 160         memmap[IBEX_RV_TIMER].base, memmap[IBEX_RV_TIMER].size);
 161     create_unimplemented_device("riscv.lowrisc.ibex.pwrmgr",
 162         memmap[IBEX_PWRMGR].base, memmap[IBEX_PWRMGR].size);
 163     create_unimplemented_device("riscv.lowrisc.ibex.rstmgr",
 164         memmap[IBEX_RSTMGR].base, memmap[IBEX_RSTMGR].size);
 165     create_unimplemented_device("riscv.lowrisc.ibex.clkmgr",
 166         memmap[IBEX_CLKMGR].base, memmap[IBEX_CLKMGR].size);
 167     create_unimplemented_device("riscv.lowrisc.ibex.aes",
 168         memmap[IBEX_AES].base, memmap[IBEX_AES].size);
 169     create_unimplemented_device("riscv.lowrisc.ibex.hmac",
 170         memmap[IBEX_HMAC].base, memmap[IBEX_HMAC].size);
 171     create_unimplemented_device("riscv.lowrisc.ibex.pinmux",
 172         memmap[IBEX_PINMUX].base, memmap[IBEX_PINMUX].size);
 173     create_unimplemented_device("riscv.lowrisc.ibex.alert_handler",
 174         memmap[IBEX_ALERT_HANDLER].base, memmap[IBEX_ALERT_HANDLER].size);
 175     create_unimplemented_device("riscv.lowrisc.ibex.nmi_gen",
 176         memmap[IBEX_NMI_GEN].base, memmap[IBEX_NMI_GEN].size);
 177     create_unimplemented_device("riscv.lowrisc.ibex.usbdev",
 178         memmap[IBEX_USBDEV].base, memmap[IBEX_USBDEV].size);
 179     create_unimplemented_device("riscv.lowrisc.ibex.padctrl",
 180         memmap[IBEX_PADCTRL].base, memmap[IBEX_PADCTRL].size);
 181 }
 182
 183 static void lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
 184 {
 185     DeviceClass *dc = DEVICE_CLASS(oc);
 186
 187     dc->realize = lowrisc_ibex_soc_realize;
 188     /* Reason: Uses serial_hds in realize function, thus can't be used twice */
 189     dc->user_creatable = false;
 190 }
 191
 192 static const TypeInfo lowrisc_ibex_soc_type_info = {
 193     .name = TYPE_RISCV_IBEX_SOC,
 194     .parent = TYPE_DEVICE,
 195     .instance_size = sizeof(LowRISCIbexSoCState),
 196     .instance_init = lowrisc_ibex_soc_init,
 197     .class_init = lowrisc_ibex_soc_class_init,
 198 };
 199
 200 static void lowrisc_ibex_soc_register_types(void)
 201 {
 202     type_register_static(&lowrisc_ibex_soc_type_info);
 203 }
 204
 205 type_init(lowrisc_ibex_soc_register_types)