Signed-off-by: Alistair Francis <alist...@alistair23.me>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
hw/arm/Kconfig | 1 +
hw/misc/Kconfig | 3 +
hw/misc/Makefile.objs | 1 +
hw/misc/stm32f4xx_exti.c | 187 +++++++++++++++++++++++++++++++
hw/misc/trace-events | 5 +
include/hw/misc/stm32f4xx_exti.h | 60 ++++++++++
6 files changed, 257 insertions(+)
create mode 100644 hw/misc/stm32f4xx_exti.c
create mode 100644 include/hw/misc/stm32f4xx_exti.h
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 9019c9fa50..68a3b27685 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -311,6 +311,7 @@ config STM32F405_SOC
bool
select ARM_V7M
select STM32F4XX_SYSCFG
+ select STM32F4XX_EXTI
config XLNX_ZYNQMP_ARM
bool
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index b9097ab2e0..fa56e5d375 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -85,6 +85,9 @@ config STM32F2XX_SYSCFG
config STM32F4XX_SYSCFG
bool
+config STM32F4XX_EXTI
+ bool
+
config MIPS_ITU
bool
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 51da9abf2a..fdceae0c51 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -58,6 +58,7 @@ obj-$(CONFIG_ZYNQ) += zynq_slcr.o
obj-$(CONFIG_ZYNQ) += zynq-xadc.o
obj-$(CONFIG_STM32F2XX_SYSCFG) += stm32f2xx_syscfg.o
obj-$(CONFIG_STM32F4XX_SYSCFG) += stm32f4xx_syscfg.o
+obj-$(CONFIG_STM32F4XX_EXTI) += stm32f4xx_exti.o
obj-$(CONFIG_MIPS_CPS) += mips_cmgcr.o
obj-$(CONFIG_MIPS_CPS) += mips_cpc.o
obj-$(CONFIG_MIPS_ITU) += mips_itu.o
diff --git a/hw/misc/stm32f4xx_exti.c b/hw/misc/stm32f4xx_exti.c
new file mode 100644
index 0000000000..04ac82ae26
--- /dev/null
+++ b/hw/misc/stm32f4xx_exti.c
@@ -0,0 +1,187 @@
+/*
+ * STM32F4XX EXTI
+ *
+ * Copyright (c) 2014 Alistair Francis <alist...@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 "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "hw/misc/stm32f4xx_exti.h"
+
+static void stm32f4xx_exti_reset(DeviceState *dev)
+{
+ STM32F4xxExtiState *s = STM32F4XX_EXTI(dev);
+
+ s->exti_imr = 0x00000000;
+ s->exti_emr = 0x00000000;
+ s->exti_rtsr = 0x00000000;
+ s->exti_ftsr = 0x00000000;
+ s->exti_swier = 0x00000000;
+ s->exti_pr = 0x00000000;
+}
+
+static void stm32f4xx_exti_set_irq(void *opaque, int irq, int level)
+{
+ STM32F4xxExtiState *s = opaque;
+
+ if (!((1 << irq) & s->exti_imr)) {
+ /* Interrupt is masked */
+ return;
+ }
+
+ trace_stm32f4xx_exti_set_irq(irq, level);
+
+ if (((1 << irq) & s->exti_rtsr) && level) {
+ /* Rising Edge */
+ qemu_irq_pulse(s->irq[irq]);
+ s->exti_pr |= 1 << irq;
+ }
+
+ if (((1 << irq) & s->exti_ftsr) && !level) {
+ /* Falling Edge */
+ qemu_irq_pulse(s->irq[irq]);
+ s->exti_pr |= 1 << irq;
+ }
+}
+
+static uint64_t stm32f4xx_exti_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ STM32F4xxExtiState *s = opaque;
+
+ trace_stm32f4xx_exti_read(addr);
+
+ switch (addr) {
+ case EXTI_IMR:
+ return s->exti_imr;
+ case EXTI_EMR:
+ return s->exti_emr;
+ case EXTI_RTSR:
+ return s->exti_rtsr;
+ case EXTI_FTSR:
+ return s->exti_ftsr;
+ case EXTI_SWIER:
+ return s->exti_swier;
+ case EXTI_PR:
+ return s->exti_pr;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "STM32F4XX_exti_read: Bad offset %x\n", (int)addr);
+ return 0;
+ }
+ return 0;
+}
+
+static void stm32f4xx_exti_write(void *opaque, hwaddr addr,
+ uint64_t val64, unsigned int size)
+{
+ STM32F4xxExtiState *s = opaque;
+ uint32_t value = (uint32_t) val64;
+
+ trace_stm32f4xx_exti_write(addr, value);
+
+ switch (addr) {
+ case EXTI_IMR:
+ s->exti_imr = value;
+ return;
+ case EXTI_EMR:
+ s->exti_emr = value;
+ return;
+ case EXTI_RTSR:
+ s->exti_rtsr = value;
+ return;
+ case EXTI_FTSR:
+ s->exti_ftsr = value;
+ return;
+ case EXTI_SWIER:
+ s->exti_swier = value;
+ return;
+ case EXTI_PR:
+ /* This bit is cleared by writing a 1 to it */
+ s->exti_pr &= ~value;
+ return;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "STM32F4XX_exti_write: Bad offset %x\n", (int)addr);
+ }
+}
+
+static const MemoryRegionOps stm32f4xx_exti_ops = {
+ .read = stm32f4xx_exti_read,
+ .write = stm32f4xx_exti_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void stm32f4xx_exti_init(Object *obj)
+{
+ STM32F4xxExtiState *s = STM32F4XX_EXTI(obj);
+ int i;
+
+ for (i = 0; i < NUM_INTERRUPT_OUT_LINES; i++) {
+ sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq[i]);
+ }
+
+ memory_region_init_io(&s->mmio, obj, &stm32f4xx_exti_ops, s,
+ TYPE_STM32F4XX_EXTI, 0x400);
+ sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+
+ qdev_init_gpio_in(DEVICE(obj), stm32f4xx_exti_set_irq,
+ NUM_GPIO_EVENT_IN_LINES);
+}
+
+static const VMStateDescription vmstate_stm32f4xx_exti = {
+ .name = TYPE_STM32F4XX_EXTI,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(exti_imr, STM32F4xxExtiState),
+ VMSTATE_UINT32(exti_emr, STM32F4xxExtiState),
+ VMSTATE_UINT32(exti_rtsr, STM32F4xxExtiState),
+ VMSTATE_UINT32(exti_ftsr, STM32F4xxExtiState),
+ VMSTATE_UINT32(exti_swier, STM32F4xxExtiState),
+ VMSTATE_UINT32(exti_pr, STM32F4xxExtiState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void stm32f4xx_exti_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->reset = stm32f4xx_exti_reset;
+ dc->vmsd = &vmstate_stm32f4xx_exti;
+}
+
+static const TypeInfo stm32f4xx_exti_info = {
+ .name = TYPE_STM32F4XX_EXTI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(STM32F4xxExtiState),
+ .instance_init = stm32f4xx_exti_init,
+ .class_init = stm32f4xx_exti_class_init,
+};
+
+static void stm32f4xx_exti_register_types(void)
+{
+ type_register_static(&stm32f4xx_exti_info);
+}
+
+type_init(stm32f4xx_exti_register_types)
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 3643949515..b7b9582e66 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -90,6 +90,11 @@ stm32f4xx_pulse_exti(int irq) "Pulse EXTI: %d"
stm32f4xx_syscfg_read(uint64_t addr) "reg read: addr: 0x%" PRIx64 " "
stm32f4xx_syscfg_write(uint64_t addr, uint64_t data) "reg write: addr: 0x%"
PRIx64 " val: 0x%" PRIx64 ""
+# stm32f4xx_exti
+stm32f4xx_exti_set_irq(int irq, int leve) "Set EXTI: %d to %d"
+stm32f4xx_exti_read(uint64_t addr) "reg read: addr: 0x%" PRIx64 " "
+stm32f4xx_exti_write(uint64_t addr, uint64_t data) "reg write: addr: 0x%"
PRIx64 " val: 0x%" PRIx64 ""
+
# tz-mpc.c
tz_mpc_reg_read(uint32_t offset, uint64_t data, unsigned size) "TZ MPC regs
read: offset 0x%x data 0x%" PRIx64 " size %u"
tz_mpc_reg_write(uint32_t offset, uint64_t data, unsigned size) "TZ MPC regs
write: offset 0x%x data 0x%" PRIx64 " size %u"
diff --git a/include/hw/misc/stm32f4xx_exti.h b/include/hw/misc/stm32f4xx_exti.h
new file mode 100644
index 0000000000..707036a41b
--- /dev/null
+++ b/include/hw/misc/stm32f4xx_exti.h
@@ -0,0 +1,60 @@
+/*
+ * STM32F4XX EXTI
+ *
+ * Copyright (c) 2014 Alistair Francis <alist...@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_STM_EXTI_H
+#define HW_STM_EXTI_H
+
+#include "hw/sysbus.h"
+#include "hw/hw.h"
+
+#define EXTI_IMR 0x00
+#define EXTI_EMR 0x04
+#define EXTI_RTSR 0x08
+#define EXTI_FTSR 0x0C
+#define EXTI_SWIER 0x10
+#define EXTI_PR 0x14
+
+#define TYPE_STM32F4XX_EXTI "stm32f4xx-exti"
+#define STM32F4XX_EXTI(obj) \
+ OBJECT_CHECK(STM32F4xxExtiState, (obj), TYPE_STM32F4XX_EXTI)
+
+#define NUM_GPIO_EVENT_IN_LINES 16
+#define NUM_INTERRUPT_OUT_LINES 16
+
+typedef struct {
+ SysBusDevice parent_obj;
+
+ MemoryRegion mmio;
+
+ uint32_t exti_imr;
+ uint32_t exti_emr;
+ uint32_t exti_rtsr;
+ uint32_t exti_ftsr;
+ uint32_t exti_swier;
+ uint32_t exti_pr;
+
+ qemu_irq irq[NUM_INTERRUPT_OUT_LINES];
+} STM32F4xxExtiState;
+
+#endif
--
2.22.0
