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-rw-r--r--default-configs/arm-softmmu.mak4
-rw-r--r--hw/arm/Makefile.objs2
-rw-r--r--hw/arm/integratorcp.c95
-rw-r--r--hw/arm/netduino2.c57
-rw-r--r--hw/arm/stm32f205_soc.c160
-rw-r--r--hw/arm/virt.c4
-rw-r--r--hw/char/Makefile.objs1
-rw-r--r--hw/char/stm32f2xx_usart.c229
-rw-r--r--hw/misc/Makefile.objs1
-rw-r--r--hw/misc/stm32f2xx_syscfg.c160
-rw-r--r--hw/timer/Makefile.objs2
-rw-r--r--hw/timer/stm32f2xx_timer.c328
-rw-r--r--include/hw/arm/stm32f205_soc.h57
-rw-r--r--include/hw/char/stm32f2xx_usart.h73
-rw-r--r--include/hw/misc/stm32f2xx_syscfg.h61
-rw-r--r--include/hw/timer/stm32f2xx_timer.h101
-rw-r--r--include/qemu/bitops.h2
-rw-r--r--target-arm/cpu64.c1
18 files changed, 1323 insertions, 15 deletions
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 149ae1b595..87d4e34d15 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -80,6 +80,10 @@ CONFIG_NSERIES=y
 CONFIG_REALVIEW=y
 CONFIG_ZAURUS=y
 CONFIG_ZYNQ=y
+CONFIG_STM32F2XX_TIMER=y
+CONFIG_STM32F2XX_USART=y
+CONFIG_STM32F2XX_SYSCFG=y
+CONFIG_STM32F205_SOC=y
 
 CONFIG_VERSATILE_PCI=y
 CONFIG_VERSATILE_I2C=y
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 6088e53653..2577f68097 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -3,8 +3,10 @@ obj-$(CONFIG_DIGIC) += digic_boards.o
 obj-y += integratorcp.o kzm.o mainstone.o musicpal.o nseries.o
 obj-y += omap_sx1.o palm.o realview.o spitz.o stellaris.o
 obj-y += tosa.o versatilepb.o vexpress.o virt.o xilinx_zynq.o z2.o
+obj-y += netduino2.o
 
 obj-y += armv7m.o exynos4210.o pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
 obj-$(CONFIG_DIGIC) += digic.o
 obj-y += omap1.o omap2.o strongarm.o
 obj-$(CONFIG_ALLWINNER_A10) += allwinner-a10.o cubieboard.o
+obj-$(CONFIG_STM32F205_SOC) += stm32f205_soc.o
diff --git a/hw/arm/integratorcp.c b/hw/arm/integratorcp.c
index 949ae1ed39..cb609cdbdf 100644
--- a/hw/arm/integratorcp.c
+++ b/hw/arm/integratorcp.c
@@ -406,16 +406,39 @@ static int icp_pic_init(SysBusDevice *sbd)
 
 /* CP control registers.  */
 
+#define TYPE_ICP_CONTROL_REGS "icp-ctrl-regs"
+#define ICP_CONTROL_REGS(obj) \
+    OBJECT_CHECK(ICPCtrlRegsState, (obj), TYPE_ICP_CONTROL_REGS)
+
+typedef struct ICPCtrlRegsState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    MemoryRegion iomem;
+
+    qemu_irq mmc_irq;
+    uint32_t intreg_state;
+} ICPCtrlRegsState;
+
+#define ICP_GPIO_MMC_WPROT      "mmc-wprot"
+#define ICP_GPIO_MMC_CARDIN     "mmc-cardin"
+
+#define ICP_INTREG_WPROT        (1 << 0)
+#define ICP_INTREG_CARDIN       (1 << 3)
+
 static uint64_t icp_control_read(void *opaque, hwaddr offset,
                                  unsigned size)
 {
+    ICPCtrlRegsState *s = opaque;
+
     switch (offset >> 2) {
     case 0: /* CP_IDFIELD */
         return 0x41034003;
     case 1: /* CP_FLASHPROG */
         return 0;
     case 2: /* CP_INTREG */
-        return 0;
+        return s->intreg_state;
     case 3: /* CP_DECODE */
         return 0x11;
     default:
@@ -427,9 +450,14 @@ static uint64_t icp_control_read(void *opaque, hwaddr offset,
 static void icp_control_write(void *opaque, hwaddr offset,
                           uint64_t value, unsigned size)
 {
+    ICPCtrlRegsState *s = opaque;
+
     switch (offset >> 2) {
-    case 1: /* CP_FLASHPROG */
     case 2: /* CP_INTREG */
+        s->intreg_state &= ~(value & ICP_INTREG_CARDIN);
+        qemu_set_irq(s->mmc_irq, !!(s->intreg_state & ICP_INTREG_CARDIN));
+        break;
+    case 1: /* CP_FLASHPROG */
     case 3: /* CP_DECODE */
         /* Nothing interesting implemented yet.  */
         break;
@@ -444,15 +472,41 @@ static const MemoryRegionOps icp_control_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static void icp_control_init(hwaddr base)
+static void icp_control_mmc_wprot(void *opaque, int line, int level)
 {
-    MemoryRegion *io;
+    ICPCtrlRegsState *s = opaque;
 
-    io = (MemoryRegion *)g_malloc0(sizeof(MemoryRegion));
-    memory_region_init_io(io, NULL, &icp_control_ops, NULL,
-                          "control", 0x00800000);
-    memory_region_add_subregion(get_system_memory(), base, io);
-    /* ??? Save/restore.  */
+    s->intreg_state &= ~ICP_INTREG_WPROT;
+    if (level) {
+        s->intreg_state |= ICP_INTREG_WPROT;
+    }
+}
+
+static void icp_control_mmc_cardin(void *opaque, int line, int level)
+{
+    ICPCtrlRegsState *s = opaque;
+
+    /* line is released by writing to CP_INTREG */
+    if (level) {
+        s->intreg_state |= ICP_INTREG_CARDIN;
+        qemu_set_irq(s->mmc_irq, 1);
+    }
+}
+
+static void icp_control_init(Object *obj)
+{
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    ICPCtrlRegsState *s = ICP_CONTROL_REGS(obj);
+    DeviceState *dev = DEVICE(obj);
+
+    memory_region_init_io(&s->iomem, OBJECT(s), &icp_control_ops, s,
+                          "icp_ctrl_regs", 0x00800000);
+    sysbus_init_mmio(sbd, &s->iomem);
+
+    qdev_init_gpio_in_named(dev, icp_control_mmc_wprot, ICP_GPIO_MMC_WPROT, 1);
+    qdev_init_gpio_in_named(dev, icp_control_mmc_cardin,
+                            ICP_GPIO_MMC_CARDIN, 1);
+    sysbus_init_irq(sbd, &s->mmc_irq);
 }
 
 
@@ -477,7 +531,7 @@ static void integratorcp_init(MachineState *machine)
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     MemoryRegion *ram_alias = g_new(MemoryRegion, 1);
     qemu_irq pic[32];
-    DeviceState *dev;
+    DeviceState *dev, *sic, *icp;
     int i;
     Error *err = NULL;
 
@@ -535,17 +589,24 @@ static void integratorcp_init(MachineState *machine)
     for (i = 0; i < 32; i++) {
         pic[i] = qdev_get_gpio_in(dev, i);
     }
-    sysbus_create_simple(TYPE_INTEGRATOR_PIC, 0xca000000, pic[26]);
+    sic = sysbus_create_simple(TYPE_INTEGRATOR_PIC, 0xca000000, pic[26]);
     sysbus_create_varargs("integrator_pit", 0x13000000,
                           pic[5], pic[6], pic[7], NULL);
     sysbus_create_simple("pl031", 0x15000000, pic[8]);
     sysbus_create_simple("pl011", 0x16000000, pic[1]);
     sysbus_create_simple("pl011", 0x17000000, pic[2]);
-    icp_control_init(0xcb000000);
+    icp = sysbus_create_simple(TYPE_ICP_CONTROL_REGS, 0xcb000000,
+                               qdev_get_gpio_in(sic, 3));
     sysbus_create_simple("pl050_keyboard", 0x18000000, pic[3]);
     sysbus_create_simple("pl050_mouse", 0x19000000, pic[4]);
     sysbus_create_simple(TYPE_INTEGRATOR_DEBUG, 0x1a000000, 0);
-    sysbus_create_varargs("pl181", 0x1c000000, pic[23], pic[24], NULL);
+
+    dev = sysbus_create_varargs("pl181", 0x1c000000, pic[23], pic[24], NULL);
+    qdev_connect_gpio_out(dev, 0,
+                          qdev_get_gpio_in_named(icp, ICP_GPIO_MMC_WPROT, 0));
+    qdev_connect_gpio_out(dev, 1,
+                          qdev_get_gpio_in_named(icp, ICP_GPIO_MMC_CARDIN, 0));
+
     if (nd_table[0].used)
         smc91c111_init(&nd_table[0], 0xc8000000, pic[27]);
 
@@ -606,10 +667,18 @@ static const TypeInfo icp_pic_info = {
     .class_init    = icp_pic_class_init,
 };
 
+static const TypeInfo icp_ctrl_regs_info = {
+    .name          = TYPE_ICP_CONTROL_REGS,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(ICPCtrlRegsState),
+    .instance_init = icp_control_init,
+};
+
 static void integratorcp_register_types(void)
 {
     type_register_static(&icp_pic_info);
     type_register_static(&core_info);
+    type_register_static(&icp_ctrl_regs_info);
 }
 
 type_init(integratorcp_register_types)
diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
new file mode 100644
index 0000000000..8f26780ef0
--- /dev/null
+++ b/hw/arm/netduino2.c
@@ -0,0 +1,57 @@
+/*
+ * Netduino 2 Machine Model
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/boards.h"
+#include "qemu/error-report.h"
+#include "hw/arm/stm32f205_soc.h"
+
+static void netduino2_init(MachineState *machine)
+{
+    DeviceState *dev;
+    Error *err = NULL;
+
+    dev = qdev_create(NULL, TYPE_STM32F205_SOC);
+    if (machine->kernel_filename) {
+        qdev_prop_set_string(dev, "kernel-filename", machine->kernel_filename);
+    }
+    qdev_prop_set_string(dev, "cpu-model", "cortex-m3");
+    object_property_set_bool(OBJECT(dev), true, "realized", &err);
+    if (err != NULL) {
+        error_report("%s", error_get_pretty(err));
+        exit(1);
+    }
+}
+
+static QEMUMachine netduino2_machine = {
+    .name = "netduino2",
+    .desc = "Netduino 2 Machine",
+    .init = netduino2_init,
+};
+
+static void netduino2_machine_init(void)
+{
+    qemu_register_machine(&netduino2_machine);
+}
+
+machine_init(netduino2_machine_init);
diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
new file mode 100644
index 0000000000..0f3bdc77b6
--- /dev/null
+++ b/hw/arm/stm32f205_soc.c
@@ -0,0 +1,160 @@
+/*
+ * STM32F205 SoC
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/arm/arm.h"
+#include "exec/address-spaces.h"
+#include "hw/arm/stm32f205_soc.h"
+
+/* At the moment only Timer 2 to 5 are modelled */
+static const uint32_t timer_addr[STM_NUM_TIMERS] = { 0x40000000, 0x40000400,
+    0x40000800, 0x40000C00 };
+static const uint32_t usart_addr[STM_NUM_USARTS] = { 0x40011000, 0x40004400,
+    0x40004800, 0x40004C00, 0x40005000, 0x40011400 };
+
+static const int timer_irq[STM_NUM_TIMERS] = {28, 29, 30, 50};
+static const int usart_irq[STM_NUM_USARTS] = {37, 38, 39, 52, 53, 71};
+
+static void stm32f205_soc_initfn(Object *obj)
+{
+    STM32F205State *s = STM32F205_SOC(obj);
+    int i;
+
+    object_initialize(&s->syscfg, sizeof(s->syscfg), TYPE_STM32F2XX_SYSCFG);
+    qdev_set_parent_bus(DEVICE(&s->syscfg), sysbus_get_default());
+
+    for (i = 0; i < STM_NUM_USARTS; i++) {
+        object_initialize(&s->usart[i], sizeof(s->usart[i]),
+                          TYPE_STM32F2XX_USART);
+        qdev_set_parent_bus(DEVICE(&s->usart[i]), sysbus_get_default());
+    }
+
+    for (i = 0; i < STM_NUM_TIMERS; i++) {
+        object_initialize(&s->timer[i], sizeof(s->timer[i]),
+                          TYPE_STM32F2XX_TIMER);
+        qdev_set_parent_bus(DEVICE(&s->timer[i]), sysbus_get_default());
+    }
+}
+
+static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
+{
+    STM32F205State *s = STM32F205_SOC(dev_soc);
+    DeviceState *syscfgdev, *usartdev, *timerdev;
+    SysBusDevice *syscfgbusdev, *usartbusdev, *timerbusdev;
+    qemu_irq *pic;
+    Error *err = NULL;
+    int i;
+
+    MemoryRegion *system_memory = get_system_memory();
+    MemoryRegion *sram = g_new(MemoryRegion, 1);
+    MemoryRegion *flash = g_new(MemoryRegion, 1);
+    MemoryRegion *flash_alias = g_new(MemoryRegion, 1);
+
+    memory_region_init_ram(flash, NULL, "STM32F205.flash", FLASH_SIZE,
+                           &error_abort);
+    memory_region_init_alias(flash_alias, NULL, "STM32F205.flash.alias",
+                             flash, 0, FLASH_SIZE);
+
+    vmstate_register_ram_global(flash);
+
+    memory_region_set_readonly(flash, true);
+    memory_region_set_readonly(flash_alias, true);
+
+    memory_region_add_subregion(system_memory, FLASH_BASE_ADDRESS, flash);
+    memory_region_add_subregion(system_memory, 0, flash_alias);
+
+    memory_region_init_ram(sram, NULL, "STM32F205.sram", SRAM_SIZE,
+                           &error_abort);
+    vmstate_register_ram_global(sram);
+    memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, sram);
+
+    pic = armv7m_init(get_system_memory(), FLASH_SIZE, 96,
+                      s->kernel_filename, s->cpu_model);
+
+    /* System configuration controller */
+    syscfgdev = DEVICE(&s->syscfg);
+    object_property_set_bool(OBJECT(&s->syscfg), true, "realized", &err);
+    if (err != NULL) {
+        error_propagate(errp, err);
+        return;
+    }
+    syscfgbusdev = SYS_BUS_DEVICE(syscfgdev);
+    sysbus_mmio_map(syscfgbusdev, 0, 0x40013800);
+    sysbus_connect_irq(syscfgbusdev, 0, pic[71]);
+
+    /* Attach UART (uses USART registers) and USART controllers */
+    for (i = 0; i < STM_NUM_USARTS; i++) {
+        usartdev = DEVICE(&(s->usart[i]));
+        object_property_set_bool(OBJECT(&s->usart[i]), true, "realized", &err);
+        if (err != NULL) {
+            error_propagate(errp, err);
+            return;
+        }
+        usartbusdev = SYS_BUS_DEVICE(usartdev);
+        sysbus_mmio_map(usartbusdev, 0, usart_addr[i]);
+        sysbus_connect_irq(usartbusdev, 0, pic[usart_irq[i]]);
+    }
+
+    /* Timer 2 to 5 */
+    for (i = 0; i < STM_NUM_TIMERS; i++) {
+        timerdev = DEVICE(&(s->timer[i]));
+        qdev_prop_set_uint64(timerdev, "clock-frequency", 1000000000);
+        object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
+        if (err != NULL) {
+            error_propagate(errp, err);
+            return;
+        }
+        timerbusdev = SYS_BUS_DEVICE(timerdev);
+        sysbus_mmio_map(timerbusdev, 0, timer_addr[i]);
+        sysbus_connect_irq(timerbusdev, 0, pic[timer_irq[i]]);
+    }
+}
+
+static Property stm32f205_soc_properties[] = {
+    DEFINE_PROP_STRING("kernel-filename", STM32F205State, kernel_filename),
+    DEFINE_PROP_STRING("cpu-model", STM32F205State, cpu_model),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void stm32f205_soc_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = stm32f205_soc_realize;
+    dc->props = stm32f205_soc_properties;
+}
+
+static const TypeInfo stm32f205_soc_info = {
+    .name          = TYPE_STM32F205_SOC,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(STM32F205State),
+    .instance_init = stm32f205_soc_initfn,
+    .class_init    = stm32f205_soc_class_init,
+};
+
+static void stm32f205_soc_types(void)
+{
+    type_register_static(&stm32f205_soc_info);
+}
+
+type_init(stm32f205_soc_types)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 93b7605722..9072bc2b1c 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -758,6 +758,7 @@ static void machvirt_init(MachineState *machine)
         CPUClass *cc = CPU_CLASS(oc);
         Object *cpuobj;
         Error *err = NULL;
+        char *cpuopts = g_strdup(cpustr[1]);
 
         if (!oc) {
             fprintf(stderr, "Unable to find CPU definition\n");
@@ -766,7 +767,8 @@ static void machvirt_init(MachineState *machine)
         cpuobj = object_new(object_class_get_name(oc));
 
         /* Handle any CPU options specified by the user */
-        cc->parse_features(CPU(cpuobj), cpustr[1], &err);
+        cc->parse_features(CPU(cpuobj), cpuopts, &err);
+        g_free(cpuopts);
         if (err) {
             error_report("%s", error_get_pretty(err));
             exit(1);
diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
index 317385d26f..5931cc8400 100644
--- a/hw/char/Makefile.objs
+++ b/hw/char/Makefile.objs
@@ -15,6 +15,7 @@ obj-$(CONFIG_OMAP) += omap_uart.o
 obj-$(CONFIG_SH4) += sh_serial.o
 obj-$(CONFIG_PSERIES) += spapr_vty.o
 obj-$(CONFIG_DIGIC) += digic-uart.o
+obj-$(CONFIG_STM32F2XX_USART) += stm32f2xx_usart.o
 
 common-obj-$(CONFIG_ETRAXFS) += etraxfs_ser.o
 common-obj-$(CONFIG_ISA_DEBUG) += debugcon.o
diff --git a/hw/char/stm32f2xx_usart.c b/hw/char/stm32f2xx_usart.c
new file mode 100644
index 0000000000..260b053044
--- /dev/null
+++ b/hw/char/stm32f2xx_usart.c
@@ -0,0 +1,229 @@
+/*
+ * STM32F2XX USART
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/char/stm32f2xx_usart.h"
+
+#ifndef STM_USART_ERR_DEBUG
+#define STM_USART_ERR_DEBUG 0
+#endif
+
+#define DB_PRINT_L(lvl, fmt, args...) do { \
+    if (STM_USART_ERR_DEBUG >= lvl) { \
+        qemu_log("%s: " fmt, __func__, ## args); \
+    } \
+} while (0);
+
+#define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
+
+static int stm32f2xx_usart_can_receive(void *opaque)
+{
+    STM32F2XXUsartState *s = opaque;
+
+    if (!(s->usart_sr & USART_SR_RXNE)) {
+        return 1;
+    }
+
+    return 0;
+}
+
+static void stm32f2xx_usart_receive(void *opaque, const uint8_t *buf, int size)
+{
+    STM32F2XXUsartState *s = opaque;
+
+    s->usart_dr = *buf;
+
+    if (!(s->usart_cr1 & USART_CR1_UE && s->usart_cr1 & USART_CR1_RE)) {
+        /* USART not enabled - drop the chars */
+        DB_PRINT("Dropping the chars\n");
+        return;
+    }
+
+    s->usart_sr |= USART_SR_RXNE;
+
+    if (s->usart_cr1 & USART_CR1_RXNEIE) {
+        qemu_set_irq(s->irq, 1);
+    }
+
+    DB_PRINT("Receiving: %c\n", s->usart_dr);
+}
+
+static void stm32f2xx_usart_reset(DeviceState *dev)
+{
+    STM32F2XXUsartState *s = STM32F2XX_USART(dev);
+
+    s->usart_sr = USART_SR_RESET;
+    s->usart_dr = 0x00000000;
+    s->usart_brr = 0x00000000;
+    s->usart_cr1 = 0x00000000;
+    s->usart_cr2 = 0x00000000;
+    s->usart_cr3 = 0x00000000;
+    s->usart_gtpr = 0x00000000;
+
+    qemu_set_irq(s->irq, 0);
+}
+
+static uint64_t stm32f2xx_usart_read(void *opaque, hwaddr addr,
+                                       unsigned int size)
+{
+    STM32F2XXUsartState *s = opaque;
+    uint64_t retvalue;
+
+    DB_PRINT("Read 0x%"HWADDR_PRIx"\n", addr);
+
+    switch (addr) {
+    case USART_SR:
+        retvalue = s->usart_sr;
+        s->usart_sr &= ~USART_SR_TC;
+        if (s->chr) {
+            qemu_chr_accept_input(s->chr);
+        }
+        return retvalue;
+    case USART_DR:
+        DB_PRINT("Value: 0x%" PRIx32 ", %c\n", s->usart_dr, (char) s->usart_dr);
+        s->usart_sr |= USART_SR_TXE;
+        s->usart_sr &= ~USART_SR_RXNE;
+        if (s->chr) {
+            qemu_chr_accept_input(s->chr);
+        }
+        qemu_set_irq(s->irq, 0);
+        return s->usart_dr & 0x3FF;
+    case USART_BRR:
+        return s->usart_brr;
+    case USART_CR1:
+        return s->usart_cr1;
+    case USART_CR2:
+        return s->usart_cr2;
+    case USART_CR3:
+        return s->usart_cr3;
+    case USART_GTPR:
+        return s->usart_gtpr;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+        return 0;
+    }
+
+    return 0;
+}
+
+static void stm32f2xx_usart_write(void *opaque, hwaddr addr,
+                                  uint64_t val64, unsigned int size)
+{
+    STM32F2XXUsartState *s = opaque;
+    uint32_t value = val64;
+    unsigned char ch;
+
+    DB_PRINT("Write 0x%" PRIx32 ", 0x%"HWADDR_PRIx"\n", value, addr);
+
+    switch (addr) {
+    case USART_SR:
+        if (value <= 0x3FF) {
+            s->usart_sr = value;
+        } else {
+            s->usart_sr &= value;
+        }
+        if (!(s->usart_sr & USART_SR_RXNE)) {
+            qemu_set_irq(s->irq, 0);
+        }
+        return;
+    case USART_DR:
+        if (value < 0xF000) {
+            ch = value;
+            if (s->chr) {
+                qemu_chr_fe_write_all(s->chr, &ch, 1);
+            }
+            s->usart_sr |= USART_SR_TC;
+            s->usart_sr &= ~USART_SR_TXE;
+        }
+        return;
+    case USART_BRR:
+        s->usart_brr = value;
+        return;
+    case USART_CR1:
+        s->usart_cr1 = value;
+            if (s->usart_cr1 & USART_CR1_RXNEIE &&
+                s->usart_sr & USART_SR_RXNE) {
+                qemu_set_irq(s->irq, 1);
+            }
+        return;
+    case USART_CR2:
+        s->usart_cr2 = value;
+        return;
+    case USART_CR3:
+        s->usart_cr3 = value;
+        return;
+    case USART_GTPR:
+        s->usart_gtpr = value;
+        return;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+    }
+}
+
+static const MemoryRegionOps stm32f2xx_usart_ops = {
+    .read = stm32f2xx_usart_read,
+    .write = stm32f2xx_usart_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void stm32f2xx_usart_init(Object *obj)
+{
+    STM32F2XXUsartState *s = STM32F2XX_USART(obj);
+
+    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
+
+    memory_region_init_io(&s->mmio, obj, &stm32f2xx_usart_ops, s,
+                          TYPE_STM32F2XX_USART, 0x2000);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+
+    s->chr = qemu_char_get_next_serial();
+
+    if (s->chr) {
+        qemu_chr_add_handlers(s->chr, stm32f2xx_usart_can_receive,
+                              stm32f2xx_usart_receive, NULL, s);
+    }
+}
+
+static void stm32f2xx_usart_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset = stm32f2xx_usart_reset;
+}
+
+static const TypeInfo stm32f2xx_usart_info = {
+    .name          = TYPE_STM32F2XX_USART,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(STM32F2XXUsartState),
+    .instance_init = stm32f2xx_usart_init,
+    .class_init    = stm32f2xx_usart_class_init,
+};
+
+static void stm32f2xx_usart_register_types(void)
+{
+    type_register_static(&stm32f2xx_usart_info);
+}
+
+type_init(stm32f2xx_usart_register_types)
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 6c6e29681a..4aa76ffec9 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -36,6 +36,7 @@ obj-$(CONFIG_OMAP) += omap_sdrc.o
 obj-$(CONFIG_OMAP) += omap_tap.o
 obj-$(CONFIG_SLAVIO) += slavio_misc.o
 obj-$(CONFIG_ZYNQ) += zynq_slcr.o
+obj-$(CONFIG_STM32F2XX_SYSCFG) += stm32f2xx_syscfg.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
 obj-$(CONFIG_EDU) += edu.o
diff --git a/hw/misc/stm32f2xx_syscfg.c b/hw/misc/stm32f2xx_syscfg.c
new file mode 100644
index 0000000000..4ae4042bf3
--- /dev/null
+++ b/hw/misc/stm32f2xx_syscfg.c
@@ -0,0 +1,160 @@
+/*
+ * STM32F2XX SYSCFG
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/misc/stm32f2xx_syscfg.h"
+
+#ifndef STM_SYSCFG_ERR_DEBUG
+#define STM_SYSCFG_ERR_DEBUG 0
+#endif
+
+#define DB_PRINT_L(lvl, fmt, args...) do { \
+    if (STM_SYSCFG_ERR_DEBUG >= lvl) { \
+        qemu_log("%s: " fmt, __func__, ## args); \
+    } \
+} while (0);
+
+#define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
+
+static void stm32f2xx_syscfg_reset(DeviceState *dev)
+{
+    STM32F2XXSyscfgState *s = STM32F2XX_SYSCFG(dev);
+
+    s->syscfg_memrmp = 0x00000000;
+    s->syscfg_pmc = 0x00000000;
+    s->syscfg_exticr1 = 0x00000000;
+    s->syscfg_exticr2 = 0x00000000;
+    s->syscfg_exticr3 = 0x00000000;
+    s->syscfg_exticr4 = 0x00000000;
+    s->syscfg_cmpcr = 0x00000000;
+}
+
+static uint64_t stm32f2xx_syscfg_read(void *opaque, hwaddr addr,
+                                     unsigned int size)
+{
+    STM32F2XXSyscfgState *s = opaque;
+
+    DB_PRINT("0x%"HWADDR_PRIx"\n", addr);
+
+    switch (addr) {
+    case SYSCFG_MEMRMP:
+        return s->syscfg_memrmp;
+    case SYSCFG_PMC:
+        return s->syscfg_pmc;
+    case SYSCFG_EXTICR1:
+        return s->syscfg_exticr1;
+    case SYSCFG_EXTICR2:
+        return s->syscfg_exticr2;
+    case SYSCFG_EXTICR3:
+        return s->syscfg_exticr3;
+    case SYSCFG_EXTICR4:
+        return s->syscfg_exticr4;
+    case SYSCFG_CMPCR:
+        return s->syscfg_cmpcr;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+        return 0;
+    }
+
+    return 0;
+}
+
+static void stm32f2xx_syscfg_write(void *opaque, hwaddr addr,
+                       uint64_t val64, unsigned int size)
+{
+    STM32F2XXSyscfgState *s = opaque;
+    uint32_t value = val64;
+
+    DB_PRINT("0x%x, 0x%"HWADDR_PRIx"\n", value, addr);
+
+    switch (addr) {
+    case SYSCFG_MEMRMP:
+        qemu_log_mask(LOG_UNIMP,
+                      "%s: Changeing the memory mapping isn't supported " \
+                      "in QEMU\n", __func__);
+        return;
+    case SYSCFG_PMC:
+        qemu_log_mask(LOG_UNIMP,
+                      "%s: Changeing the memory mapping isn't supported " \
+                      "in QEMU\n", __func__);
+        return;
+    case SYSCFG_EXTICR1:
+        s->syscfg_exticr1 = (value & 0xFFFF);
+        return;
+    case SYSCFG_EXTICR2:
+        s->syscfg_exticr2 = (value & 0xFFFF);
+        return;
+    case SYSCFG_EXTICR3:
+        s->syscfg_exticr3 = (value & 0xFFFF);
+        return;
+    case SYSCFG_EXTICR4:
+        s->syscfg_exticr4 = (value & 0xFFFF);
+        return;
+    case SYSCFG_CMPCR:
+        s->syscfg_cmpcr = value;
+        return;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+    }
+}
+
+static const MemoryRegionOps stm32f2xx_syscfg_ops = {
+    .read = stm32f2xx_syscfg_read,
+    .write = stm32f2xx_syscfg_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void stm32f2xx_syscfg_init(Object *obj)
+{
+    STM32F2XXSyscfgState *s = STM32F2XX_SYSCFG(obj);
+
+    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
+
+    memory_region_init_io(&s->mmio, obj, &stm32f2xx_syscfg_ops, s,
+                          TYPE_STM32F2XX_SYSCFG, 0x400);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+}
+
+static void stm32f2xx_syscfg_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset = stm32f2xx_syscfg_reset;
+}
+
+static const TypeInfo stm32f2xx_syscfg_info = {
+    .name          = TYPE_STM32F2XX_SYSCFG,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(STM32F2XXSyscfgState),
+    .instance_init = stm32f2xx_syscfg_init,
+    .class_init    = stm32f2xx_syscfg_class_init,
+};
+
+static void stm32f2xx_syscfg_register_types(void)
+{
+    type_register_static(&stm32f2xx_syscfg_info);
+}
+
+type_init(stm32f2xx_syscfg_register_types)
diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs
index 2c86c3d412..133bd0d455 100644
--- a/hw/timer/Makefile.objs
+++ b/hw/timer/Makefile.objs
@@ -31,3 +31,5 @@ obj-$(CONFIG_DIGIC) += digic-timer.o
 obj-$(CONFIG_MC146818RTC) += mc146818rtc.o
 
 obj-$(CONFIG_ALLWINNER_A10_PIT) += allwinner-a10-pit.o
+
+common-obj-$(CONFIG_STM32F2XX_TIMER) += stm32f2xx_timer.o
diff --git a/hw/timer/stm32f2xx_timer.c b/hw/timer/stm32f2xx_timer.c
new file mode 100644
index 0000000000..ecadf9df85
--- /dev/null
+++ b/hw/timer/stm32f2xx_timer.c
@@ -0,0 +1,328 @@
+/*
+ * STM32F2XX Timer
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/timer/stm32f2xx_timer.h"
+
+#ifndef STM_TIMER_ERR_DEBUG
+#define STM_TIMER_ERR_DEBUG 0
+#endif
+
+#define DB_PRINT_L(lvl, fmt, args...) do { \
+    if (STM_TIMER_ERR_DEBUG >= lvl) { \
+        qemu_log("%s: " fmt, __func__, ## args); \
+    } \
+} while (0);
+
+#define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
+
+static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now);
+
+static void stm32f2xx_timer_interrupt(void *opaque)
+{
+    STM32F2XXTimerState *s = opaque;
+
+    DB_PRINT("Interrupt\n");
+
+    if (s->tim_dier & TIM_DIER_UIE && s->tim_cr1 & TIM_CR1_CEN) {
+        s->tim_sr |= 1;
+        qemu_irq_pulse(s->irq);
+        stm32f2xx_timer_set_alarm(s, s->hit_time);
+    }
+}
+
+static inline int64_t stm32f2xx_ns_to_ticks(STM32F2XXTimerState *s, int64_t t)
+{
+    return muldiv64(t, s->freq_hz, 1000000000ULL) / (s->tim_psc + 1);
+}
+
+static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now)
+{
+    uint64_t ticks;
+    int64_t now_ticks;
+
+    if (s->tim_arr == 0) {
+        return;
+    }
+
+    DB_PRINT("Alarm set at: 0x%x\n", s->tim_cr1);
+
+    now_ticks = stm32f2xx_ns_to_ticks(s, now);
+    ticks = s->tim_arr - (now_ticks - s->tick_offset);
+
+    DB_PRINT("Alarm set in %d ticks\n", (int) ticks);
+
+    s->hit_time = muldiv64((ticks + (uint64_t) now_ticks) * (s->tim_psc + 1),
+                               1000000000ULL, s->freq_hz);
+
+    timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->hit_time);
+    DB_PRINT("Wait Time: %" PRId64 " ticks\n", s->hit_time);
+}
+
+static void stm32f2xx_timer_reset(DeviceState *dev)
+{
+    STM32F2XXTimerState *s = STM32F2XXTIMER(dev);
+    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+
+    s->tim_cr1 = 0;
+    s->tim_cr2 = 0;
+    s->tim_smcr = 0;
+    s->tim_dier = 0;
+    s->tim_sr = 0;
+    s->tim_egr = 0;
+    s->tim_ccmr1 = 0;
+    s->tim_ccmr2 = 0;
+    s->tim_ccer = 0;
+    s->tim_psc = 0;
+    s->tim_arr = 0;
+    s->tim_ccr1 = 0;
+    s->tim_ccr2 = 0;
+    s->tim_ccr3 = 0;
+    s->tim_ccr4 = 0;
+    s->tim_dcr = 0;
+    s->tim_dmar = 0;
+    s->tim_or = 0;
+
+    s->tick_offset = stm32f2xx_ns_to_ticks(s, now);
+}
+
+static uint64_t stm32f2xx_timer_read(void *opaque, hwaddr offset,
+                           unsigned size)
+{
+    STM32F2XXTimerState *s = opaque;
+
+    DB_PRINT("Read 0x%"HWADDR_PRIx"\n", offset);
+
+    switch (offset) {
+    case TIM_CR1:
+        return s->tim_cr1;
+    case TIM_CR2:
+        return s->tim_cr2;
+    case TIM_SMCR:
+        return s->tim_smcr;
+    case TIM_DIER:
+        return s->tim_dier;
+    case TIM_SR:
+        return s->tim_sr;
+    case TIM_EGR:
+        return s->tim_egr;
+    case TIM_CCMR1:
+        return s->tim_ccmr1;
+    case TIM_CCMR2:
+        return s->tim_ccmr2;
+    case TIM_CCER:
+        return s->tim_ccer;
+    case TIM_CNT:
+        return stm32f2xx_ns_to_ticks(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) -
+               s->tick_offset;
+    case TIM_PSC:
+        return s->tim_psc;
+    case TIM_ARR:
+        return s->tim_arr;
+    case TIM_CCR1:
+        return s->tim_ccr1;
+    case TIM_CCR2:
+        return s->tim_ccr2;
+    case TIM_CCR3:
+        return s->tim_ccr3;
+    case TIM_CCR4:
+        return s->tim_ccr4;
+    case TIM_DCR:
+        return s->tim_dcr;
+    case TIM_DMAR:
+        return s->tim_dmar;
+    case TIM_OR:
+        return s->tim_or;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset);
+    }
+
+    return 0;
+}
+
+static void stm32f2xx_timer_write(void *opaque, hwaddr offset,
+                        uint64_t val64, unsigned size)
+{
+    STM32F2XXTimerState *s = opaque;
+    uint32_t value = val64;
+    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    uint32_t timer_val = 0;
+
+    DB_PRINT("Write 0x%x, 0x%"HWADDR_PRIx"\n", value, offset);
+
+    switch (offset) {
+    case TIM_CR1:
+        s->tim_cr1 = value;
+        return;
+    case TIM_CR2:
+        s->tim_cr2 = value;
+        return;
+    case TIM_SMCR:
+        s->tim_smcr = value;
+        return;
+    case TIM_DIER:
+        s->tim_dier = value;
+        return;
+    case TIM_SR:
+        /* This is set by hardware and cleared by software */
+        s->tim_sr &= value;
+        return;
+    case TIM_EGR:
+        s->tim_egr = value;
+        if (s->tim_egr & TIM_EGR_UG) {
+            timer_val = 0;
+            break;
+        }
+        return;
+    case TIM_CCMR1:
+        s->tim_ccmr1 = value;
+        return;
+    case TIM_CCMR2:
+        s->tim_ccmr2 = value;
+        return;
+    case TIM_CCER:
+        s->tim_ccer = value;
+        return;
+    case TIM_PSC:
+        timer_val = stm32f2xx_ns_to_ticks(s, now) - s->tick_offset;
+        s->tim_psc = value;
+        value = timer_val;
+        break;
+    case TIM_CNT:
+        timer_val = value;
+        break;
+    case TIM_ARR:
+        s->tim_arr = value;
+        stm32f2xx_timer_set_alarm(s, now);
+        return;
+    case TIM_CCR1:
+        s->tim_ccr1 = value;
+        return;
+    case TIM_CCR2:
+        s->tim_ccr2 = value;
+        return;
+    case TIM_CCR3:
+        s->tim_ccr3 = value;
+        return;
+    case TIM_CCR4:
+        s->tim_ccr4 = value;
+        return;
+    case TIM_DCR:
+        s->tim_dcr = value;
+        return;
+    case TIM_DMAR:
+        s->tim_dmar = value;
+        return;
+    case TIM_OR:
+        s->tim_or = value;
+        return;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset);
+        return;
+    }
+
+    /* This means that a register write has affected the timer in a way that
+     * requires a refresh of both tick_offset and the alarm.
+     */
+    s->tick_offset = stm32f2xx_ns_to_ticks(s, now) - timer_val;
+    stm32f2xx_timer_set_alarm(s, now);
+}
+
+static const MemoryRegionOps stm32f2xx_timer_ops = {
+    .read = stm32f2xx_timer_read,
+    .write = stm32f2xx_timer_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static const VMStateDescription vmstate_stm32f2xx_timer = {
+    .name = TYPE_STM32F2XX_TIMER,
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT64(tick_offset, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_cr1, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_cr2, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_smcr, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_dier, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_sr, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_egr, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccmr1, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccmr2, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccer, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_psc, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_arr, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccr1, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccr2, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccr3, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_ccr4, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_dcr, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_dmar, STM32F2XXTimerState),
+        VMSTATE_UINT32(tim_or, STM32F2XXTimerState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property stm32f2xx_timer_properties[] = {
+    DEFINE_PROP_UINT64("clock-frequency", struct STM32F2XXTimerState,
+                       freq_hz, 1000000000),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void stm32f2xx_timer_init(Object *obj)
+{
+    STM32F2XXTimerState *s = STM32F2XXTIMER(obj);
+
+    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
+
+    memory_region_init_io(&s->iomem, obj, &stm32f2xx_timer_ops, s,
+                          "stm32f2xx_timer", 0x4000);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
+
+    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, stm32f2xx_timer_interrupt, s);
+}
+
+static void stm32f2xx_timer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset = stm32f2xx_timer_reset;
+    dc->props = stm32f2xx_timer_properties;
+    dc->vmsd = &vmstate_stm32f2xx_timer;
+}
+
+static const TypeInfo stm32f2xx_timer_info = {
+    .name          = TYPE_STM32F2XX_TIMER,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(STM32F2XXTimerState),
+    .instance_init = stm32f2xx_timer_init,
+    .class_init    = stm32f2xx_timer_class_init,
+};
+
+static void stm32f2xx_timer_register_types(void)
+{
+    type_register_static(&stm32f2xx_timer_info);
+}
+
+type_init(stm32f2xx_timer_register_types)
diff --git a/include/hw/arm/stm32f205_soc.h b/include/hw/arm/stm32f205_soc.h
new file mode 100644
index 0000000000..3cda17018d
--- /dev/null
+++ b/include/hw/arm/stm32f205_soc.h
@@ -0,0 +1,57 @@
+/*
+ * STM32F205 SoC
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_ARM_STM32F205SOC_H
+#define HW_ARM_STM32F205SOC_H
+
+#include "hw/misc/stm32f2xx_syscfg.h"
+#include "hw/timer/stm32f2xx_timer.h"
+#include "hw/char/stm32f2xx_usart.h"
+
+#define TYPE_STM32F205_SOC "stm32f205_soc"
+#define STM32F205_SOC(obj) \
+    OBJECT_CHECK(STM32F205State, (obj), TYPE_STM32F205_SOC)
+
+#define STM_NUM_USARTS 6
+#define STM_NUM_TIMERS 4
+
+#define FLASH_BASE_ADDRESS 0x08000000
+#define FLASH_SIZE (1024 * 1024)
+#define SRAM_BASE_ADDRESS 0x20000000
+#define SRAM_SIZE (128 * 1024)
+
+typedef struct STM32F205State {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    char *kernel_filename;
+    char *cpu_model;
+
+    STM32F2XXSyscfgState syscfg;
+    STM32F2XXUsartState usart[STM_NUM_USARTS];
+    STM32F2XXTimerState timer[STM_NUM_TIMERS];
+} STM32F205State;
+
+#endif
diff --git a/include/hw/char/stm32f2xx_usart.h b/include/hw/char/stm32f2xx_usart.h
new file mode 100644
index 0000000000..b97f192a45
--- /dev/null
+++ b/include/hw/char/stm32f2xx_usart.h
@@ -0,0 +1,73 @@
+/*
+ * STM32F2XX USART
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_STM32F2XX_USART_H
+#define HW_STM32F2XX_USART_H
+
+#include "hw/sysbus.h"
+#include "sysemu/char.h"
+#include "hw/hw.h"
+
+#define USART_SR   0x00
+#define USART_DR   0x04
+#define USART_BRR  0x08
+#define USART_CR1  0x0C
+#define USART_CR2  0x10
+#define USART_CR3  0x14
+#define USART_GTPR 0x18
+
+#define USART_SR_RESET 0x00C00000
+
+#define USART_SR_TXE  (1 << 7)
+#define USART_SR_TC   (1 << 6)
+#define USART_SR_RXNE (1 << 5)
+
+#define USART_CR1_UE  (1 << 13)
+#define USART_CR1_RXNEIE  (1 << 5)
+#define USART_CR1_TE  (1 << 3)
+#define USART_CR1_RE  (1 << 2)
+
+#define TYPE_STM32F2XX_USART "stm32f2xx-usart"
+#define STM32F2XX_USART(obj) \
+    OBJECT_CHECK(STM32F2XXUsartState, (obj), TYPE_STM32F2XX_USART)
+
+typedef struct {
+    /* <private> */
+    SysBusDevice parent_obj;
+
+    /* <public> */
+    MemoryRegion mmio;
+
+    uint32_t usart_sr;
+    uint32_t usart_dr;
+    uint32_t usart_brr;
+    uint32_t usart_cr1;
+    uint32_t usart_cr2;
+    uint32_t usart_cr3;
+    uint32_t usart_gtpr;
+
+    CharDriverState *chr;
+    qemu_irq irq;
+} STM32F2XXUsartState;
+#endif /* HW_STM32F2XX_USART_H */
diff --git a/include/hw/misc/stm32f2xx_syscfg.h b/include/hw/misc/stm32f2xx_syscfg.h
new file mode 100644
index 0000000000..69e6a30fc5
--- /dev/null
+++ b/include/hw/misc/stm32f2xx_syscfg.h
@@ -0,0 +1,61 @@
+/*
+ * STM32F2XX SYSCFG
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_STM32F2XX_SYSCFG_H
+#define HW_STM32F2XX_SYSCFG_H
+
+#include "hw/sysbus.h"
+#include "hw/hw.h"
+
+#define SYSCFG_MEMRMP  0x00
+#define SYSCFG_PMC     0x04
+#define SYSCFG_EXTICR1 0x08
+#define SYSCFG_EXTICR2 0x0C
+#define SYSCFG_EXTICR3 0x10
+#define SYSCFG_EXTICR4 0x14
+#define SYSCFG_CMPCR   0x20
+
+#define TYPE_STM32F2XX_SYSCFG "stm32f2xx-syscfg"
+#define STM32F2XX_SYSCFG(obj) \
+    OBJECT_CHECK(STM32F2XXSyscfgState, (obj), TYPE_STM32F2XX_SYSCFG)
+
+typedef struct {
+    /* <private> */
+    SysBusDevice parent_obj;
+
+    /* <public> */
+    MemoryRegion mmio;
+
+    uint32_t syscfg_memrmp;
+    uint32_t syscfg_pmc;
+    uint32_t syscfg_exticr1;
+    uint32_t syscfg_exticr2;
+    uint32_t syscfg_exticr3;
+    uint32_t syscfg_exticr4;
+    uint32_t syscfg_cmpcr;
+
+    qemu_irq irq;
+} STM32F2XXSyscfgState;
+
+#endif /* HW_STM32F2XX_SYSCFG_H */
diff --git a/include/hw/timer/stm32f2xx_timer.h b/include/hw/timer/stm32f2xx_timer.h
new file mode 100644
index 0000000000..e6a83237a5
--- /dev/null
+++ b/include/hw/timer/stm32f2xx_timer.h
@@ -0,0 +1,101 @@
+/*
+ * STM32F2XX Timer
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_STM32F2XX_TIMER_H
+#define HW_STM32F2XX_TIMER_H
+
+#include "hw/sysbus.h"
+#include "qemu/timer.h"
+#include "sysemu/sysemu.h"
+
+#define TIM_CR1      0x00
+#define TIM_CR2      0x04
+#define TIM_SMCR     0x08
+#define TIM_DIER     0x0C
+#define TIM_SR       0x10
+#define TIM_EGR      0x14
+#define TIM_CCMR1    0x18
+#define TIM_CCMR2    0x1C
+#define TIM_CCER     0x20
+#define TIM_CNT      0x24
+#define TIM_PSC      0x28
+#define TIM_ARR      0x2C
+#define TIM_CCR1     0x34
+#define TIM_CCR2     0x38
+#define TIM_CCR3     0x3C
+#define TIM_CCR4     0x40
+#define TIM_DCR      0x48
+#define TIM_DMAR     0x4C
+#define TIM_OR       0x50
+
+#define TIM_CR1_CEN   1
+
+#define TIM_EGR_UG 1
+
+#define TIM_CCER_CC2E   (1 << 4)
+#define TIM_CCMR1_OC2M2 (1 << 14)
+#define TIM_CCMR1_OC2M1 (1 << 13)
+#define TIM_CCMR1_OC2M0 (1 << 12)
+#define TIM_CCMR1_OC2PE (1 << 11)
+
+#define TIM_DIER_UIE  1
+
+#define TYPE_STM32F2XX_TIMER "stm32f2xx-timer"
+#define STM32F2XXTIMER(obj) OBJECT_CHECK(STM32F2XXTimerState, \
+                            (obj), TYPE_STM32F2XX_TIMER)
+
+typedef struct STM32F2XXTimerState {
+    /* <private> */
+    SysBusDevice parent_obj;
+
+    /* <public> */
+    MemoryRegion iomem;
+    QEMUTimer *timer;
+    qemu_irq irq;
+
+    int64_t tick_offset;
+    uint64_t hit_time;
+    uint64_t freq_hz;
+
+    uint32_t tim_cr1;
+    uint32_t tim_cr2;
+    uint32_t tim_smcr;
+    uint32_t tim_dier;
+    uint32_t tim_sr;
+    uint32_t tim_egr;
+    uint32_t tim_ccmr1;
+    uint32_t tim_ccmr2;
+    uint32_t tim_ccer;
+    uint32_t tim_psc;
+    uint32_t tim_arr;
+    uint32_t tim_ccr1;
+    uint32_t tim_ccr2;
+    uint32_t tim_ccr3;
+    uint32_t tim_ccr4;
+    uint32_t tim_dcr;
+    uint32_t tim_dmar;
+    uint32_t tim_or;
+} STM32F2XXTimerState;
+
+#endif /* HW_STM32F2XX_TIMER_H */
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 181bd46063..90ca8df4e2 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -354,7 +354,7 @@ static inline int32_t sextract32(uint32_t value, int start, int length)
  * Returns: the sign extended value of the bit field extracted from the
  * input value.
  */
-static inline uint64_t sextract64(uint64_t value, int start, int length)
+static inline int64_t sextract64(uint64_t value, int start, int length)
 {
     assert(start >= 0 && length > 0 && length <= 64 - start);
     /* Note that this implementation relies on right shift of signed
diff --git a/target-arm/cpu64.c b/target-arm/cpu64.c
index 823c739f08..270bc2fec7 100644
--- a/target-arm/cpu64.c
+++ b/target-arm/cpu64.c
@@ -96,6 +96,7 @@ static void aarch64_a57_initfn(Object *obj)
 {
     ARMCPU *cpu = ARM_CPU(obj);
 
+    cpu->dtb_compatible = "arm,cortex-a57";
     set_feature(&cpu->env, ARM_FEATURE_V8);
     set_feature(&cpu->env, ARM_FEATURE_VFP4);
     set_feature(&cpu->env, ARM_FEATURE_NEON);