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1/*
2 * STM32L4x5 SoC family
3 *
4 * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
5 * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr>
6 *
7 * SPDX-License-Identifier: GPL-2.0-or-later
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 *
12 * This work is heavily inspired by the stm32f405_soc by Alistair Francis.
13 * Original code is licensed under the MIT License:
14 *
15 * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
16 */
17
18/*
19 * The reference used is the STMicroElectronics RM0351 Reference manual
20 * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
21 * https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
22 */
23
24#include "qemu/osdep.h"
25#include "qemu/units.h"
26#include "qapi/error.h"
27#include "exec/address-spaces.h"
28#include "sysemu/sysemu.h"
29#include "hw/arm/stm32l4x5_soc.h"
30#include "hw/qdev-clock.h"
31#include "hw/misc/unimp.h"
32
33#define FLASH_BASE_ADDRESS 0x08000000
34#define SRAM1_BASE_ADDRESS 0x20000000
35#define SRAM1_SIZE (96 * KiB)
36#define SRAM2_BASE_ADDRESS 0x10000000
37#define SRAM2_SIZE (32 * KiB)
38
52671f69 39#define EXTI_ADDR 0x40010400
7dfe2312 40#define SYSCFG_ADDR 0x40010000
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41
42#define NUM_EXTI_IRQ 40
43/* Match exti line connections with their CPU IRQ number */
44/* See Vector Table (Reference Manual p.396) */
45static const int exti_irq[NUM_EXTI_IRQ] = {
46 6, /* GPIO[0] */
47 7, /* GPIO[1] */
48 8, /* GPIO[2] */
49 9, /* GPIO[3] */
50 10, /* GPIO[4] */
51 23, 23, 23, 23, 23, /* GPIO[5..9] */
52 40, 40, 40, 40, 40, 40, /* GPIO[10..15] */
53 1, /* PVD */
54 67, /* OTG_FS_WKUP, Direct */
55 41, /* RTC_ALARM */
56 2, /* RTC_TAMP_STAMP2/CSS_LSE */
57 3, /* RTC wakeup timer */
58 63, /* COMP1 */
59 63, /* COMP2 */
60 31, /* I2C1 wakeup, Direct */
61 33, /* I2C2 wakeup, Direct */
62 72, /* I2C3 wakeup, Direct */
63 37, /* USART1 wakeup, Direct */
64 38, /* USART2 wakeup, Direct */
65 39, /* USART3 wakeup, Direct */
66 52, /* UART4 wakeup, Direct */
67 53, /* UART4 wakeup, Direct */
68 70, /* LPUART1 wakeup, Direct */
69 65, /* LPTIM1, Direct */
70 66, /* LPTIM2, Direct */
71 76, /* SWPMI1 wakeup, Direct */
72 1, /* PVM1 wakeup */
73 1, /* PVM2 wakeup */
74 1, /* PVM3 wakeup */
75 1, /* PVM4 wakeup */
76 78 /* LCD wakeup, Direct */
77};
78
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79static void stm32l4x5_soc_initfn(Object *obj)
80{
81 Stm32l4x5SocState *s = STM32L4X5_SOC(obj);
82
52671f69 83 object_initialize_child(obj, "exti", &s->exti, TYPE_STM32L4X5_EXTI);
7dfe2312 84 object_initialize_child(obj, "syscfg", &s->syscfg, TYPE_STM32L4X5_SYSCFG);
52671f69 85
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86 s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
87 s->refclk = qdev_init_clock_in(DEVICE(s), "refclk", NULL, NULL, 0);
88}
89
90static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
91{
92 ERRP_GUARD();
93 Stm32l4x5SocState *s = STM32L4X5_SOC(dev_soc);
94 const Stm32l4x5SocClass *sc = STM32L4X5_SOC_GET_CLASS(dev_soc);
95 MemoryRegion *system_memory = get_system_memory();
96 DeviceState *armv7m;
52671f69 97 SysBusDevice *busdev;
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98
99 /*
100 * We use s->refclk internally and only define it with qdev_init_clock_in()
101 * so it is correctly parented and not leaked on an init/deinit; it is not
102 * intended as an externally exposed clock.
103 */
104 if (clock_has_source(s->refclk)) {
105 error_setg(errp, "refclk clock must not be wired up by the board code");
106 return;
107 }
108
109 if (!clock_has_source(s->sysclk)) {
110 error_setg(errp, "sysclk clock must be wired up by the board code");
111 return;
112 }
113
114 /*
115 * TODO: ideally we should model the SoC RCC and its ability to
116 * change the sysclk frequency and define different sysclk sources.
117 */
118
119 /* The refclk always runs at frequency HCLK / 8 */
120 clock_set_mul_div(s->refclk, 8, 1);
121 clock_set_source(s->refclk, s->sysclk);
122
123 if (!memory_region_init_rom(&s->flash, OBJECT(dev_soc), "flash",
124 sc->flash_size, errp)) {
125 return;
126 }
127 memory_region_init_alias(&s->flash_alias, OBJECT(dev_soc),
128 "flash_boot_alias", &s->flash, 0,
129 sc->flash_size);
130
131 memory_region_add_subregion(system_memory, FLASH_BASE_ADDRESS, &s->flash);
132 memory_region_add_subregion(system_memory, 0, &s->flash_alias);
133
134 if (!memory_region_init_ram(&s->sram1, OBJECT(dev_soc), "SRAM1", SRAM1_SIZE,
135 errp)) {
136 return;
137 }
138 memory_region_add_subregion(system_memory, SRAM1_BASE_ADDRESS, &s->sram1);
139
140 if (!memory_region_init_ram(&s->sram2, OBJECT(dev_soc), "SRAM2", SRAM2_SIZE,
141 errp)) {
142 return;
143 }
144 memory_region_add_subregion(system_memory, SRAM2_BASE_ADDRESS, &s->sram2);
145
146 object_initialize_child(OBJECT(dev_soc), "armv7m", &s->armv7m, TYPE_ARMV7M);
147 armv7m = DEVICE(&s->armv7m);
148 qdev_prop_set_uint32(armv7m, "num-irq", 96);
4a04655c 149 qdev_prop_set_uint32(armv7m, "num-prio-bits", 4);
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150 qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
151 qdev_prop_set_bit(armv7m, "enable-bitband", true);
152 qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk);
153 qdev_connect_clock_in(armv7m, "refclk", s->refclk);
154 object_property_set_link(OBJECT(&s->armv7m), "memory",
155 OBJECT(system_memory), &error_abort);
156 if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
157 return;
158 }
159
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160 /* System configuration controller */
161 busdev = SYS_BUS_DEVICE(&s->syscfg);
162 if (!sysbus_realize(busdev, errp)) {
163 return;
164 }
165 sysbus_mmio_map(busdev, 0, SYSCFG_ADDR);
166 /*
167 * TODO: when the GPIO device is implemented, connect it
168 * to SYCFG using `qdev_connect_gpio_out`, NUM_GPIOS and
169 * GPIO_NUM_PINS.
170 */
171
172 /* EXTI device */
52671f69
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173 busdev = SYS_BUS_DEVICE(&s->exti);
174 if (!sysbus_realize(busdev, errp)) {
175 return;
176 }
177 sysbus_mmio_map(busdev, 0, EXTI_ADDR);
178 for (unsigned i = 0; i < NUM_EXTI_IRQ; i++) {
179 sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, exti_irq[i]));
180 }
181
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182 for (unsigned i = 0; i < 16; i++) {
183 qdev_connect_gpio_out(DEVICE(&s->syscfg), i,
184 qdev_get_gpio_in(DEVICE(&s->exti), i));
185 }
186
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187 /* APB1 BUS */
188 create_unimplemented_device("TIM2", 0x40000000, 0x400);
189 create_unimplemented_device("TIM3", 0x40000400, 0x400);
190 create_unimplemented_device("TIM4", 0x40000800, 0x400);
191 create_unimplemented_device("TIM5", 0x40000C00, 0x400);
192 create_unimplemented_device("TIM6", 0x40001000, 0x400);
193 create_unimplemented_device("TIM7", 0x40001400, 0x400);
194 /* RESERVED: 0x40001800, 0x1000 */
195 create_unimplemented_device("RTC", 0x40002800, 0x400);
196 create_unimplemented_device("WWDG", 0x40002C00, 0x400);
197 create_unimplemented_device("IWDG", 0x40003000, 0x400);
198 /* RESERVED: 0x40001800, 0x400 */
199 create_unimplemented_device("SPI2", 0x40003800, 0x400);
200 create_unimplemented_device("SPI3", 0x40003C00, 0x400);
201 /* RESERVED: 0x40004000, 0x400 */
202 create_unimplemented_device("USART2", 0x40004400, 0x400);
203 create_unimplemented_device("USART3", 0x40004800, 0x400);
204 create_unimplemented_device("UART4", 0x40004C00, 0x400);
205 create_unimplemented_device("UART5", 0x40005000, 0x400);
206 create_unimplemented_device("I2C1", 0x40005400, 0x400);
207 create_unimplemented_device("I2C2", 0x40005800, 0x400);
208 create_unimplemented_device("I2C3", 0x40005C00, 0x400);
209 /* RESERVED: 0x40006000, 0x400 */
210 create_unimplemented_device("CAN1", 0x40006400, 0x400);
211 /* RESERVED: 0x40006800, 0x400 */
212 create_unimplemented_device("PWR", 0x40007000, 0x400);
213 create_unimplemented_device("DAC1", 0x40007400, 0x400);
214 create_unimplemented_device("OPAMP", 0x40007800, 0x400);
215 create_unimplemented_device("LPTIM1", 0x40007C00, 0x400);
216 create_unimplemented_device("LPUART1", 0x40008000, 0x400);
217 /* RESERVED: 0x40008400, 0x400 */
218 create_unimplemented_device("SWPMI1", 0x40008800, 0x400);
219 /* RESERVED: 0x40008C00, 0x800 */
220 create_unimplemented_device("LPTIM2", 0x40009400, 0x400);
221 /* RESERVED: 0x40009800, 0x6800 */
222
223 /* APB2 BUS */
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224 create_unimplemented_device("VREFBUF", 0x40010030, 0x1D0);
225 create_unimplemented_device("COMP", 0x40010200, 0x200);
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226 /* RESERVED: 0x40010800, 0x1400 */
227 create_unimplemented_device("FIREWALL", 0x40011C00, 0x400);
228 /* RESERVED: 0x40012000, 0x800 */
229 create_unimplemented_device("SDMMC1", 0x40012800, 0x400);
230 create_unimplemented_device("TIM1", 0x40012C00, 0x400);
231 create_unimplemented_device("SPI1", 0x40013000, 0x400);
232 create_unimplemented_device("TIM8", 0x40013400, 0x400);
233 create_unimplemented_device("USART1", 0x40013800, 0x400);
234 /* RESERVED: 0x40013C00, 0x400 */
235 create_unimplemented_device("TIM15", 0x40014000, 0x400);
236 create_unimplemented_device("TIM16", 0x40014400, 0x400);
237 create_unimplemented_device("TIM17", 0x40014800, 0x400);
238 /* RESERVED: 0x40014C00, 0x800 */
239 create_unimplemented_device("SAI1", 0x40015400, 0x400);
240 create_unimplemented_device("SAI2", 0x40015800, 0x400);
241 /* RESERVED: 0x40015C00, 0x400 */
242 create_unimplemented_device("DFSDM1", 0x40016000, 0x400);
243 /* RESERVED: 0x40016400, 0x9C00 */
244
245 /* AHB1 BUS */
246 create_unimplemented_device("DMA1", 0x40020000, 0x400);
247 create_unimplemented_device("DMA2", 0x40020400, 0x400);
248 /* RESERVED: 0x40020800, 0x800 */
249 create_unimplemented_device("RCC", 0x40021000, 0x400);
250 /* RESERVED: 0x40021400, 0xC00 */
251 create_unimplemented_device("FLASH", 0x40022000, 0x400);
252 /* RESERVED: 0x40022400, 0xC00 */
253 create_unimplemented_device("CRC", 0x40023000, 0x400);
254 /* RESERVED: 0x40023400, 0x400 */
255 create_unimplemented_device("TSC", 0x40024000, 0x400);
256
257 /* RESERVED: 0x40024400, 0x7FDBC00 */
258
259 /* AHB2 BUS */
260 create_unimplemented_device("GPIOA", 0x48000000, 0x400);
261 create_unimplemented_device("GPIOB", 0x48000400, 0x400);
262 create_unimplemented_device("GPIOC", 0x48000800, 0x400);
263 create_unimplemented_device("GPIOD", 0x48000C00, 0x400);
264 create_unimplemented_device("GPIOE", 0x48001000, 0x400);
265 create_unimplemented_device("GPIOF", 0x48001400, 0x400);
266 create_unimplemented_device("GPIOG", 0x48001800, 0x400);
267 create_unimplemented_device("GPIOH", 0x48001C00, 0x400);
268 /* RESERVED: 0x48002000, 0x7FDBC00 */
269 create_unimplemented_device("OTG_FS", 0x50000000, 0x40000);
270 create_unimplemented_device("ADC", 0x50040000, 0x400);
271 /* RESERVED: 0x50040400, 0x20400 */
272 create_unimplemented_device("RNG", 0x50060800, 0x400);
273
274 /* AHB3 BUS */
275 create_unimplemented_device("FMC", 0xA0000000, 0x1000);
276 create_unimplemented_device("QUADSPI", 0xA0001000, 0x400);
277}
278
279static void stm32l4x5_soc_class_init(ObjectClass *klass, void *data)
280{
281
282 DeviceClass *dc = DEVICE_CLASS(klass);
283
284 dc->realize = stm32l4x5_soc_realize;
285 /* Reason: Mapped at fixed location on the system bus */
286 dc->user_creatable = false;
287 /* No vmstate or reset required: device has no internal state */
288}
289
290static void stm32l4x5xc_soc_class_init(ObjectClass *oc, void *data)
291{
292 Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
293
294 ssc->flash_size = 256 * KiB;
295}
296
297static void stm32l4x5xe_soc_class_init(ObjectClass *oc, void *data)
298{
299 Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
300
301 ssc->flash_size = 512 * KiB;
302}
303
304static void stm32l4x5xg_soc_class_init(ObjectClass *oc, void *data)
305{
306 Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
307
308 ssc->flash_size = 1 * MiB;
309}
310
311static const TypeInfo stm32l4x5_soc_types[] = {
312 {
313 .name = TYPE_STM32L4X5XC_SOC,
314 .parent = TYPE_STM32L4X5_SOC,
315 .class_init = stm32l4x5xc_soc_class_init,
316 }, {
317 .name = TYPE_STM32L4X5XE_SOC,
318 .parent = TYPE_STM32L4X5_SOC,
319 .class_init = stm32l4x5xe_soc_class_init,
320 }, {
321 .name = TYPE_STM32L4X5XG_SOC,
322 .parent = TYPE_STM32L4X5_SOC,
323 .class_init = stm32l4x5xg_soc_class_init,
324 }, {
325 .name = TYPE_STM32L4X5_SOC,
326 .parent = TYPE_SYS_BUS_DEVICE,
327 .instance_size = sizeof(Stm32l4x5SocState),
328 .instance_init = stm32l4x5_soc_initfn,
329 .class_size = sizeof(Stm32l4x5SocClass),
330 .class_init = stm32l4x5_soc_class_init,
331 .abstract = true,
332 }
333};
334
335DEFINE_TYPES(stm32l4x5_soc_types)