@samitouri / QOSamiQemu
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1 /*
2 * SmartFusion2 SoC emulation.
3 *
4 * Copyright (c) 2017-2020 Subbaraya Sundeep <sundeep.lkml@gmail.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "qemu/units.h"
27 #include "qapi/error.h"
28 #include "system/address-spaces.h"
29 #include "hw/char/serial-mm.h"
30 #include "hw/arm/msf2-soc.h"
31 #include "hw/misc/unimp.h"
32 #include "hw/core/qdev-clock.h"
33 #include "system/system.h"
34
35 #define MSF2_TIMER_BASE 0x40004000
36 #define MSF2_SYSREG_BASE 0x40038000
37 #define MSF2_EMAC_BASE 0x40041000
38
39 #define ENVM_BASE_ADDRESS 0x60000000
40
41 #define SRAM_BASE_ADDRESS 0x20000000
42
43 #define MSF2_EMAC_IRQ 12
44
45 #define MSF2_ENVM_MAX_SIZE (512 * KiB)
46
47 /*
48 * eSRAM max size is 80k without SECDED(Single error correction and
49 * dual error detection) feature and 64k with SECDED.
50 * We do not support SECDED now.
51 */
52 #define MSF2_ESRAM_MAX_SIZE (80 * KiB)
53
54 static const uint32_t spi_addr[MSF2_NUM_SPIS] = { 0x40001000 , 0x40011000 };
55 static const uint32_t uart_addr[MSF2_NUM_UARTS] = { 0x40000000 , 0x40010000 };
56
57 static const int spi_irq[MSF2_NUM_SPIS] = { 2, 3 };
58 static const int uart_irq[MSF2_NUM_UARTS] = { 10, 11 };
59 static const int timer_irq[MSF2_NUM_TIMERS] = { 14, 15 };
60
61 static void m2sxxx_soc_initfn(Object *obj)
62 {
63 MSF2State *s = MSF2_SOC(obj);
64 int i;
65
66 object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
67
68 object_initialize_child(obj, "sysreg", &s->sysreg, TYPE_MSF2_SYSREG);
69
70 object_initialize_child(obj, "timer", &s->timer, TYPE_MSS_TIMER);
71
72 for (i = 0; i < MSF2_NUM_SPIS; i++) {
73 object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_MSS_SPI);
74 }
75
76 object_initialize_child(obj, "emac", &s->emac, TYPE_MSS_EMAC);
77
78 s->m3clk = qdev_init_clock_in(DEVICE(obj), "m3clk", NULL, NULL, 0);
79 s->refclk = qdev_init_clock_in(DEVICE(obj), "refclk", NULL, NULL, 0);
80 }
81
82 static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
83 {
84 MSF2State *s = MSF2_SOC(dev_soc);
85 DeviceState *dev, *armv7m;
86 SysBusDevice *busdev;
87 int i;
88
89 MemoryRegion *system_memory = get_system_memory();
90
91 if (!clock_has_source(s->m3clk)) {
92 error_setg(errp, "m3clk must be wired up by the board code");
93 return;
94 }
95
96 /*
97 * We use s->refclk internally and only define it with qdev_init_clock_in()
98 * so it is correctly parented and not leaked on an init/deinit; it is not
99 * intended as an externally exposed clock.
100 */
101 if (clock_has_source(s->refclk)) {
102 error_setg(errp, "refclk must not be wired up by the board code");
103 return;
104 }
105
106 /*
107 * TODO: ideally we should model the SoC SYSTICK_CR register at 0xe0042038,
108 * which allows the guest to program the divisor between the m3clk and
109 * the systick refclk to either /4, /8, /16 or /32, as well as setting
110 * the value the guest can read in the STCALIB register. Currently we
111 * implement the divisor as a fixed /32, which matches the reset value
112 * of SYSTICK_CR.
113 */
114 clock_set_mul_div(s->refclk, 32, 1);
115 clock_set_source(s->refclk, s->m3clk);
116
117 memory_region_init_rom(&s->nvm, OBJECT(dev_soc), "MSF2.eNVM", s->envm_size,
118 &error_fatal);
119 /*
120 * On power-on, the eNVM region 0x60000000 is automatically
121 * remapped to the Cortex-M3 processor executable region
122 * start address (0x0). We do not support remapping other eNVM,
123 * eSRAM and DDR regions by guest(via Sysreg) currently.
124 */
125 memory_region_init_alias(&s->nvm_alias, OBJECT(dev_soc), "MSF2.eNVM",
126 &s->nvm, 0, s->envm_size);
127
128 memory_region_add_subregion(system_memory, ENVM_BASE_ADDRESS, &s->nvm);
129 memory_region_add_subregion(system_memory, 0, &s->nvm_alias);
130
131 memory_region_init_ram(&s->sram, NULL, "MSF2.eSRAM", s->esram_size,
132 &error_fatal);
133 memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, &s->sram);
134
135 armv7m = DEVICE(&s->armv7m);
136 qdev_prop_set_uint32(armv7m, "num-irq", 81);
137 qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
138 qdev_prop_set_bit(armv7m, "enable-bitband", true);
139 qdev_connect_clock_in(armv7m, "cpuclk", s->m3clk);
140 qdev_connect_clock_in(armv7m, "refclk", s->refclk);
141 object_property_set_link(OBJECT(&s->armv7m), "memory",
142 OBJECT(get_system_memory()), &error_abort);
143 if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
144 return;
145 }
146
147 for (i = 0; i < MSF2_NUM_UARTS; i++) {
148 if (serial_hd(i)) {
149 serial_mm_init(get_system_memory(), uart_addr[i], 2,
150 qdev_get_gpio_in(armv7m, uart_irq[i]),
151 115200, serial_hd(i), DEVICE_NATIVE_ENDIAN);
152 }
153 }
154
155 dev = DEVICE(&s->timer);
156 /*
157 * APB0 clock is the timer input clock.
158 * TODO: ideally the MSF2 timer device should use a Clock rather than a
159 * clock-frequency integer property.
160 */
161 qdev_prop_set_uint32(dev, "clock-frequency",
162 clock_get_hz(s->m3clk) / s->apb0div);
163 if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer), errp)) {
164 return;
165 }
166 busdev = SYS_BUS_DEVICE(dev);
167 sysbus_mmio_map(busdev, 0, MSF2_TIMER_BASE);
168 sysbus_connect_irq(busdev, 0,
169 qdev_get_gpio_in(armv7m, timer_irq[0]));
170 sysbus_connect_irq(busdev, 1,
171 qdev_get_gpio_in(armv7m, timer_irq[1]));
172
173 dev = DEVICE(&s->sysreg);
174 qdev_prop_set_uint32(dev, "apb0divisor", s->apb0div);
175 qdev_prop_set_uint32(dev, "apb1divisor", s->apb1div);
176 if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysreg), errp)) {
177 return;
178 }
179 busdev = SYS_BUS_DEVICE(dev);
180 sysbus_mmio_map(busdev, 0, MSF2_SYSREG_BASE);
181
182 for (i = 0; i < MSF2_NUM_SPIS; i++) {
183 gchar *bus_name;
184
185 if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
186 return;
187 }
188
189 sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi[i]), 0, spi_addr[i]);
190 sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi[i]), 0,
191 qdev_get_gpio_in(armv7m, spi_irq[i]));
192
193 /* Alias controller SPI bus to the SoC itself */
194 bus_name = g_strdup_printf("spi%d", i);
195 object_property_add_alias(OBJECT(s), bus_name,
196 OBJECT(&s->spi[i]), "spi");
197 g_free(bus_name);
198 }
199
200 dev = DEVICE(&s->emac);
201 qemu_configure_nic_device(dev, true, NULL);
202 object_property_set_link(OBJECT(&s->emac), "ahb-bus",
203 OBJECT(get_system_memory()), &error_abort);
204 if (!sysbus_realize(SYS_BUS_DEVICE(&s->emac), errp)) {
205 return;
206 }
207 busdev = SYS_BUS_DEVICE(dev);
208 sysbus_mmio_map(busdev, 0, MSF2_EMAC_BASE);
209 sysbus_connect_irq(busdev, 0,
210 qdev_get_gpio_in(armv7m, MSF2_EMAC_IRQ));
211
212 /* Below devices are not modelled yet. */
213 create_unimplemented_device("i2c_0", 0x40002000, 0x1000);
214 create_unimplemented_device("dma", 0x40003000, 0x1000);
215 create_unimplemented_device("watchdog", 0x40005000, 0x1000);
216 create_unimplemented_device("i2c_1", 0x40012000, 0x1000);
217 create_unimplemented_device("gpio", 0x40013000, 0x1000);
218 create_unimplemented_device("hs-dma", 0x40014000, 0x1000);
219 create_unimplemented_device("can", 0x40015000, 0x1000);
220 create_unimplemented_device("rtc", 0x40017000, 0x1000);
221 create_unimplemented_device("apb_config", 0x40020000, 0x10000);
222 create_unimplemented_device("usb", 0x40043000, 0x1000);
223 }
224
225 static const Property m2sxxx_soc_properties[] = {
226 /*
227 * part name specifies the type of SmartFusion2 device variant(this
228 * property is for information purpose only.
229 */
230 DEFINE_PROP_STRING("part-name", MSF2State, part_name),
231 DEFINE_PROP_UINT64("eNVM-size", MSF2State, envm_size, MSF2_ENVM_MAX_SIZE),
232 DEFINE_PROP_UINT64("eSRAM-size", MSF2State, esram_size,
233 MSF2_ESRAM_MAX_SIZE),
234 /* default divisors in Libero GUI */
235 DEFINE_PROP_UINT8("apb0div", MSF2State, apb0div, 2),
236 DEFINE_PROP_UINT8("apb1div", MSF2State, apb1div, 2),
237 };
238
239 static void m2sxxx_soc_class_init(ObjectClass *klass, const void *data)
240 {
241 DeviceClass *dc = DEVICE_CLASS(klass);
242
243 dc->realize = m2sxxx_soc_realize;
244 device_class_set_props(dc, m2sxxx_soc_properties);
245 }
246
247 static const TypeInfo m2sxxx_soc_info = {
248 .name = TYPE_MSF2_SOC,
249 .parent = TYPE_SYS_BUS_DEVICE,
250 .instance_size = sizeof(MSF2State),
251 .instance_init = m2sxxx_soc_initfn,
252 .class_init = m2sxxx_soc_class_init,
253 };
254
255 static void m2sxxx_soc_types(void)
256 {
257 type_register_static(&m2sxxx_soc_info);
258 }
259
260 type_init(m2sxxx_soc_types)