hw/arm/stm32f205_soc.c

   1 /*
   2  * STM32F205 SoC
   3  *
   4  * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
   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 "qapi/error.h"
  27 #include "qemu-common.h"
  28 #include "hw/arm/arm.h"
  29 #include "exec/address-spaces.h"
  30 #include "hw/arm/stm32f205_soc.h"
  31
  32 /* At the moment only Timer 2 to 5 are modelled */
  33 static const uint32_t timer_addr[STM_NUM_TIMERS] = { 0x40000000, 0x40000400,
  34     0x40000800, 0x40000C00 };
  35 static const uint32_t usart_addr[STM_NUM_USARTS] = { 0x40011000, 0x40004400,
  36     0x40004800, 0x40004C00, 0x40005000, 0x40011400 };
  37
  38 static const int timer_irq[STM_NUM_TIMERS] = {28, 29, 30, 50};
  39 static const int usart_irq[STM_NUM_USARTS] = {37, 38, 39, 52, 53, 71};
  40
  41 static void stm32f205_soc_initfn(Object *obj)
  42 {
  43     STM32F205State *s = STM32F205_SOC(obj);
  44     int i;
  45
  46     object_initialize(&s->syscfg, sizeof(s->syscfg), TYPE_STM32F2XX_SYSCFG);
  47     qdev_set_parent_bus(DEVICE(&s->syscfg), sysbus_get_default());
  48
  49     for (i = 0; i < STM_NUM_USARTS; i++) {
  50         object_initialize(&s->usart[i], sizeof(s->usart[i]),
  51                           TYPE_STM32F2XX_USART);
  52         qdev_set_parent_bus(DEVICE(&s->usart[i]), sysbus_get_default());
  53     }
  54
  55     for (i = 0; i < STM_NUM_TIMERS; i++) {
  56         object_initialize(&s->timer[i], sizeof(s->timer[i]),
  57                           TYPE_STM32F2XX_TIMER);
  58         qdev_set_parent_bus(DEVICE(&s->timer[i]), sysbus_get_default());
  59     }
  60 }
  61
  62 static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
  63 {
  64     STM32F205State *s = STM32F205_SOC(dev_soc);
  65     DeviceState *syscfgdev, *usartdev, *timerdev, *nvic;
  66     SysBusDevice *syscfgbusdev, *usartbusdev, *timerbusdev;
  67     Error *err = NULL;
  68     int i;
  69
  70     MemoryRegion *system_memory = get_system_memory();
  71     MemoryRegion *sram = g_new(MemoryRegion, 1);
  72     MemoryRegion *flash = g_new(MemoryRegion, 1);
  73     MemoryRegion *flash_alias = g_new(MemoryRegion, 1);
  74
  75     memory_region_init_ram(flash, NULL, "STM32F205.flash", FLASH_SIZE,
  76                            &error_fatal);
  77     memory_region_init_alias(flash_alias, NULL, "STM32F205.flash.alias",
  78                              flash, 0, FLASH_SIZE);
  79
  80     vmstate_register_ram_global(flash);
  81
  82     memory_region_set_readonly(flash, true);
  83     memory_region_set_readonly(flash_alias, true);
  84
  85     memory_region_add_subregion(system_memory, FLASH_BASE_ADDRESS, flash);
  86     memory_region_add_subregion(system_memory, 0, flash_alias);
  87
  88     memory_region_init_ram(sram, NULL, "STM32F205.sram", SRAM_SIZE,
  89                            &error_fatal);
  90     vmstate_register_ram_global(sram);
  91     memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, sram);
  92
  93     nvic = armv7m_init(get_system_memory(), FLASH_SIZE, 96,
  94                        s->kernel_filename, s->cpu_model);
  95
  96     /* System configuration controller */
  97     syscfgdev = DEVICE(&s->syscfg);
  98     object_property_set_bool(OBJECT(&s->syscfg), true, "realized", &err);
  99     if (err != NULL) {
 100         error_propagate(errp, err);
 101         return;
 102     }
 103     syscfgbusdev = SYS_BUS_DEVICE(syscfgdev);
 104     sysbus_mmio_map(syscfgbusdev, 0, 0x40013800);
 105     sysbus_connect_irq(syscfgbusdev, 0, qdev_get_gpio_in(nvic, 71));
 106
 107     /* Attach UART (uses USART registers) and USART controllers */
 108     for (i = 0; i < STM_NUM_USARTS; i++) {
 109         usartdev = DEVICE(&(s->usart[i]));
 110         qdev_prop_set_chr(usartdev, "chardev", i < MAX_SERIAL_PORTS ? serial_hds[i] : NULL);
 111         object_property_set_bool(OBJECT(&s->usart[i]), true, "realized", &err);
 112         if (err != NULL) {
 113             error_propagate(errp, err);
 114             return;
 115         }
 116         usartbusdev = SYS_BUS_DEVICE(usartdev);
 117         sysbus_mmio_map(usartbusdev, 0, usart_addr[i]);
 118         sysbus_connect_irq(usartbusdev, 0,
 119                            qdev_get_gpio_in(nvic, usart_irq[i]));
 120     }
 121
 122     /* Timer 2 to 5 */
 123     for (i = 0; i < STM_NUM_TIMERS; i++) {
 124         timerdev = DEVICE(&(s->timer[i]));
 125         qdev_prop_set_uint64(timerdev, "clock-frequency", 1000000000);
 126         object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
 127         if (err != NULL) {
 128             error_propagate(errp, err);
 129             return;
 130         }
 131         timerbusdev = SYS_BUS_DEVICE(timerdev);
 132         sysbus_mmio_map(timerbusdev, 0, timer_addr[i]);
 133         sysbus_connect_irq(timerbusdev, 0,
 134                            qdev_get_gpio_in(nvic, timer_irq[i]));
 135     }
 136 }
 137
 138 static Property stm32f205_soc_properties[] = {
 139     DEFINE_PROP_STRING("kernel-filename", STM32F205State, kernel_filename),
 140     DEFINE_PROP_STRING("cpu-model", STM32F205State, cpu_model),
 141     DEFINE_PROP_END_OF_LIST(),
 142 };
 143
 144 static void stm32f205_soc_class_init(ObjectClass *klass, void *data)
 145 {
 146     DeviceClass *dc = DEVICE_CLASS(klass);
 147
 148     dc->realize = stm32f205_soc_realize;
 149     dc->props = stm32f205_soc_properties;
 150 }
 151
 152 static const TypeInfo stm32f205_soc_info = {
 153     .name          = TYPE_STM32F205_SOC,
 154     .parent        = TYPE_SYS_BUS_DEVICE,
 155     .instance_size = sizeof(STM32F205State),
 156     .instance_init = stm32f205_soc_initfn,
 157     .class_init    = stm32f205_soc_class_init,
 158 };
 159
 160 static void stm32f205_soc_types(void)
 161 {
 162     type_register_static(&stm32f205_soc_info);
 163 }
 164
 165 type_init(stm32f205_soc_types)