2 * QEMU RISC-V Board Compatible with SiFive Freedom E SDK
4 * Copyright (c) 2017 SiFive, Inc.
6 * Provides a board compatible with the SiFive Freedom E SDK:
9 * 1) CLINT (Core Level Interruptor)
10 * 2) PLIC (Platform Level Interrupt Controller)
11 * 3) PRCI (Power, Reset, Clock, Interrupt)
12 * 4) Registers emulated as RAM: AON, GPIO, QSPI, PWM
13 * 5) Flash memory emulated as RAM
15 * The Mask ROM reset vector jumps to the flash payload at 0x2040_0000.
16 * The OTP ROM and Flash boot code will be emulated in a future version.
18 * This program is free software; you can redistribute it and/or modify it
19 * under the terms and conditions of the GNU General Public License,
20 * version 2 or later, as published by the Free Software Foundation.
22 * This program is distributed in the hope it will be useful, but WITHOUT
23 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
24 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
27 * You should have received a copy of the GNU General Public License along with
28 * this program. If not, see <http://www.gnu.org/licenses/>.
31 #include "qemu/osdep.h"
32 #include "qemu/cutils.h"
33 #include "qemu/error-report.h"
34 #include "qapi/error.h"
35 #include "hw/boards.h"
36 #include "hw/loader.h"
37 #include "hw/sysbus.h"
38 #include "hw/misc/unimp.h"
39 #include "target/riscv/cpu.h"
40 #include "hw/riscv/riscv_hart.h"
41 #include "hw/riscv/sifive_e.h"
42 #include "hw/riscv/boot.h"
43 #include "hw/char/sifive_uart.h"
44 #include "hw/intc/riscv_aclint.h"
45 #include "hw/intc/sifive_plic.h"
46 #include "hw/misc/sifive_e_prci.h"
47 #include "hw/misc/sifive_e_aon.h"
48 #include "chardev/char.h"
49 #include "sysemu/sysemu.h"
51 static const MemMapEntry sifive_e_memmap
[] = {
52 [SIFIVE_E_DEV_DEBUG
] = { 0x0, 0x1000 },
53 [SIFIVE_E_DEV_MROM
] = { 0x1000, 0x2000 },
54 [SIFIVE_E_DEV_OTP
] = { 0x20000, 0x2000 },
55 [SIFIVE_E_DEV_CLINT
] = { 0x2000000, 0x10000 },
56 [SIFIVE_E_DEV_PLIC
] = { 0xc000000, 0x4000000 },
57 [SIFIVE_E_DEV_AON
] = { 0x10000000, 0x8000 },
58 [SIFIVE_E_DEV_PRCI
] = { 0x10008000, 0x8000 },
59 [SIFIVE_E_DEV_OTP_CTRL
] = { 0x10010000, 0x1000 },
60 [SIFIVE_E_DEV_GPIO0
] = { 0x10012000, 0x1000 },
61 [SIFIVE_E_DEV_UART0
] = { 0x10013000, 0x1000 },
62 [SIFIVE_E_DEV_QSPI0
] = { 0x10014000, 0x1000 },
63 [SIFIVE_E_DEV_PWM0
] = { 0x10015000, 0x1000 },
64 [SIFIVE_E_DEV_UART1
] = { 0x10023000, 0x1000 },
65 [SIFIVE_E_DEV_QSPI1
] = { 0x10024000, 0x1000 },
66 [SIFIVE_E_DEV_PWM1
] = { 0x10025000, 0x1000 },
67 [SIFIVE_E_DEV_QSPI2
] = { 0x10034000, 0x1000 },
68 [SIFIVE_E_DEV_PWM2
] = { 0x10035000, 0x1000 },
69 [SIFIVE_E_DEV_XIP
] = { 0x20000000, 0x20000000 },
70 [SIFIVE_E_DEV_DTIM
] = { 0x80000000, 0x4000 }
73 static void sifive_e_machine_init(MachineState
*machine
)
75 MachineClass
*mc
= MACHINE_GET_CLASS(machine
);
76 const MemMapEntry
*memmap
= sifive_e_memmap
;
78 SiFiveEState
*s
= RISCV_E_MACHINE(machine
);
79 MemoryRegion
*sys_mem
= get_system_memory();
82 if (machine
->ram_size
!= mc
->default_ram_size
) {
83 char *sz
= size_to_str(mc
->default_ram_size
);
84 error_report("Invalid RAM size, should be %s", sz
);
90 object_initialize_child(OBJECT(machine
), "soc", &s
->soc
, TYPE_RISCV_E_SOC
);
91 qdev_realize(DEVICE(&s
->soc
), NULL
, &error_fatal
);
93 /* Data Tightly Integrated Memory */
94 memory_region_add_subregion(sys_mem
,
95 memmap
[SIFIVE_E_DEV_DTIM
].base
, machine
->ram
);
97 /* Mask ROM reset vector */
98 uint32_t reset_vec
[4];
101 reset_vec
[1] = 0x200102b7; /* 0x1004: lui t0,0x20010 */
103 reset_vec
[1] = 0x204002b7; /* 0x1004: lui t0,0x20400 */
105 reset_vec
[2] = 0x00028067; /* 0x1008: jr t0 */
107 reset_vec
[0] = reset_vec
[3] = 0;
109 /* copy in the reset vector in little_endian byte order */
110 for (i
= 0; i
< sizeof(reset_vec
) >> 2; i
++) {
111 reset_vec
[i
] = cpu_to_le32(reset_vec
[i
]);
113 rom_add_blob_fixed_as("mrom.reset", reset_vec
, sizeof(reset_vec
),
114 memmap
[SIFIVE_E_DEV_MROM
].base
, &address_space_memory
);
116 if (machine
->kernel_filename
) {
117 riscv_load_kernel(machine
, &s
->soc
.cpus
,
118 memmap
[SIFIVE_E_DEV_DTIM
].base
,
123 static bool sifive_e_machine_get_revb(Object
*obj
, Error
**errp
)
125 SiFiveEState
*s
= RISCV_E_MACHINE(obj
);
130 static void sifive_e_machine_set_revb(Object
*obj
, bool value
, Error
**errp
)
132 SiFiveEState
*s
= RISCV_E_MACHINE(obj
);
137 static void sifive_e_machine_instance_init(Object
*obj
)
139 SiFiveEState
*s
= RISCV_E_MACHINE(obj
);
144 static void sifive_e_machine_class_init(ObjectClass
*oc
, void *data
)
146 MachineClass
*mc
= MACHINE_CLASS(oc
);
148 mc
->desc
= "RISC-V Board compatible with SiFive E SDK";
149 mc
->init
= sifive_e_machine_init
;
151 mc
->default_cpu_type
= SIFIVE_E_CPU
;
152 mc
->default_ram_id
= "riscv.sifive.e.ram";
153 mc
->default_ram_size
= sifive_e_memmap
[SIFIVE_E_DEV_DTIM
].size
;
155 object_class_property_add_bool(oc
, "revb", sifive_e_machine_get_revb
,
156 sifive_e_machine_set_revb
);
157 object_class_property_set_description(oc
, "revb",
158 "Set on to tell QEMU that it should model "
159 "the revB HiFive1 board");
162 static const TypeInfo sifive_e_machine_typeinfo
= {
163 .name
= MACHINE_TYPE_NAME("sifive_e"),
164 .parent
= TYPE_MACHINE
,
165 .class_init
= sifive_e_machine_class_init
,
166 .instance_init
= sifive_e_machine_instance_init
,
167 .instance_size
= sizeof(SiFiveEState
),
170 static void sifive_e_machine_init_register_types(void)
172 type_register_static(&sifive_e_machine_typeinfo
);
175 type_init(sifive_e_machine_init_register_types
)
177 static void sifive_e_soc_init(Object
*obj
)
179 MachineState
*ms
= MACHINE(qdev_get_machine());
180 SiFiveESoCState
*s
= RISCV_E_SOC(obj
);
182 object_initialize_child(obj
, "cpus", &s
->cpus
, TYPE_RISCV_HART_ARRAY
);
183 object_property_set_int(OBJECT(&s
->cpus
), "num-harts", ms
->smp
.cpus
,
185 object_property_set_int(OBJECT(&s
->cpus
), "resetvec", 0x1004, &error_abort
);
186 object_initialize_child(obj
, "riscv.sifive.e.gpio0", &s
->gpio
,
188 object_initialize_child(obj
, "riscv.sifive.e.aon", &s
->aon
,
192 static void sifive_e_soc_realize(DeviceState
*dev
, Error
**errp
)
194 MachineState
*ms
= MACHINE(qdev_get_machine());
195 const MemMapEntry
*memmap
= sifive_e_memmap
;
196 SiFiveESoCState
*s
= RISCV_E_SOC(dev
);
197 MemoryRegion
*sys_mem
= get_system_memory();
199 object_property_set_str(OBJECT(&s
->cpus
), "cpu-type", ms
->cpu_type
,
201 sysbus_realize(SYS_BUS_DEVICE(&s
->cpus
), &error_fatal
);
204 memory_region_init_rom(&s
->mask_rom
, OBJECT(dev
), "riscv.sifive.e.mrom",
205 memmap
[SIFIVE_E_DEV_MROM
].size
, &error_fatal
);
206 memory_region_add_subregion(sys_mem
,
207 memmap
[SIFIVE_E_DEV_MROM
].base
, &s
->mask_rom
);
210 s
->plic
= sifive_plic_create(memmap
[SIFIVE_E_DEV_PLIC
].base
,
211 (char *)SIFIVE_E_PLIC_HART_CONFIG
, ms
->smp
.cpus
, 0,
212 SIFIVE_E_PLIC_NUM_SOURCES
,
213 SIFIVE_E_PLIC_NUM_PRIORITIES
,
214 SIFIVE_E_PLIC_PRIORITY_BASE
,
215 SIFIVE_E_PLIC_PENDING_BASE
,
216 SIFIVE_E_PLIC_ENABLE_BASE
,
217 SIFIVE_E_PLIC_ENABLE_STRIDE
,
218 SIFIVE_E_PLIC_CONTEXT_BASE
,
219 SIFIVE_E_PLIC_CONTEXT_STRIDE
,
220 memmap
[SIFIVE_E_DEV_PLIC
].size
);
221 riscv_aclint_swi_create(memmap
[SIFIVE_E_DEV_CLINT
].base
,
222 0, ms
->smp
.cpus
, false);
223 riscv_aclint_mtimer_create(memmap
[SIFIVE_E_DEV_CLINT
].base
+
224 RISCV_ACLINT_SWI_SIZE
,
225 RISCV_ACLINT_DEFAULT_MTIMER_SIZE
, 0, ms
->smp
.cpus
,
226 RISCV_ACLINT_DEFAULT_MTIMECMP
, RISCV_ACLINT_DEFAULT_MTIME
,
227 SIFIVE_E_LFCLK_DEFAULT_FREQ
, false);
228 sifive_e_prci_create(memmap
[SIFIVE_E_DEV_PRCI
].base
);
232 if (!sysbus_realize(SYS_BUS_DEVICE(&s
->aon
), errp
)) {
236 /* Map AON registers */
237 sysbus_mmio_map(SYS_BUS_DEVICE(&s
->aon
), 0, memmap
[SIFIVE_E_DEV_AON
].base
);
241 if (!sysbus_realize(SYS_BUS_DEVICE(&s
->gpio
), errp
)) {
245 /* Map GPIO registers */
246 sysbus_mmio_map(SYS_BUS_DEVICE(&s
->gpio
), 0, memmap
[SIFIVE_E_DEV_GPIO0
].base
);
248 /* Pass all GPIOs to the SOC layer so they are available to the board */
249 qdev_pass_gpios(DEVICE(&s
->gpio
), dev
, NULL
);
251 /* Connect GPIO interrupts to the PLIC */
252 for (int i
= 0; i
< 32; i
++) {
253 sysbus_connect_irq(SYS_BUS_DEVICE(&s
->gpio
), i
,
254 qdev_get_gpio_in(DEVICE(s
->plic
),
255 SIFIVE_E_GPIO0_IRQ0
+ i
));
257 sysbus_connect_irq(SYS_BUS_DEVICE(&s
->aon
), 0,
258 qdev_get_gpio_in(DEVICE(s
->plic
),
259 SIFIVE_E_AON_WDT_IRQ
));
261 sifive_uart_create(sys_mem
, memmap
[SIFIVE_E_DEV_UART0
].base
,
262 serial_hd(0), qdev_get_gpio_in(DEVICE(s
->plic
), SIFIVE_E_UART0_IRQ
));
263 create_unimplemented_device("riscv.sifive.e.qspi0",
264 memmap
[SIFIVE_E_DEV_QSPI0
].base
, memmap
[SIFIVE_E_DEV_QSPI0
].size
);
265 create_unimplemented_device("riscv.sifive.e.pwm0",
266 memmap
[SIFIVE_E_DEV_PWM0
].base
, memmap
[SIFIVE_E_DEV_PWM0
].size
);
267 sifive_uart_create(sys_mem
, memmap
[SIFIVE_E_DEV_UART1
].base
,
268 serial_hd(1), qdev_get_gpio_in(DEVICE(s
->plic
), SIFIVE_E_UART1_IRQ
));
269 create_unimplemented_device("riscv.sifive.e.qspi1",
270 memmap
[SIFIVE_E_DEV_QSPI1
].base
, memmap
[SIFIVE_E_DEV_QSPI1
].size
);
271 create_unimplemented_device("riscv.sifive.e.pwm1",
272 memmap
[SIFIVE_E_DEV_PWM1
].base
, memmap
[SIFIVE_E_DEV_PWM1
].size
);
273 create_unimplemented_device("riscv.sifive.e.qspi2",
274 memmap
[SIFIVE_E_DEV_QSPI2
].base
, memmap
[SIFIVE_E_DEV_QSPI2
].size
);
275 create_unimplemented_device("riscv.sifive.e.pwm2",
276 memmap
[SIFIVE_E_DEV_PWM2
].base
, memmap
[SIFIVE_E_DEV_PWM2
].size
);
279 memory_region_init_rom(&s
->xip_mem
, OBJECT(dev
), "riscv.sifive.e.xip",
280 memmap
[SIFIVE_E_DEV_XIP
].size
, &error_fatal
);
281 memory_region_add_subregion(sys_mem
, memmap
[SIFIVE_E_DEV_XIP
].base
,
285 static void sifive_e_soc_class_init(ObjectClass
*oc
, void *data
)
287 DeviceClass
*dc
= DEVICE_CLASS(oc
);
289 dc
->realize
= sifive_e_soc_realize
;
290 /* Reason: Uses serial_hds in realize function, thus can't be used twice */
291 dc
->user_creatable
= false;
294 static const TypeInfo sifive_e_soc_type_info
= {
295 .name
= TYPE_RISCV_E_SOC
,
296 .parent
= TYPE_DEVICE
,
297 .instance_size
= sizeof(SiFiveESoCState
),
298 .instance_init
= sifive_e_soc_init
,
299 .class_init
= sifive_e_soc_class_init
,
302 static void sifive_e_soc_register_types(void)
304 type_register_static(&sifive_e_soc_type_info
);
307 type_init(sifive_e_soc_register_types
)