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[PATCH v3 1/3] hw/misc: Implement STM32L4x5 SYSCFG
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From: |
Inès Varhol |
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Subject: |
[PATCH v3 1/3] hw/misc: Implement STM32L4x5 SYSCFG |
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Date: |
Fri, 29 Dec 2023 17:47:09 +0100 |
Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
---
docs/system/arm/b-l475e-iot01a.rst | 2 +-
hw/misc/Kconfig | 3 +
hw/misc/meson.build | 1 +
hw/misc/stm32l4x5_syscfg.c | 265 +++++++++++++++++++++++++++++
hw/misc/trace-events | 6 +
include/hw/misc/stm32l4x5_syscfg.h | 54 ++++++
6 files changed, 330 insertions(+), 1 deletion(-)
create mode 100644 hw/misc/stm32l4x5_syscfg.c
create mode 100644 include/hw/misc/stm32l4x5_syscfg.h
diff --git a/docs/system/arm/b-l475e-iot01a.rst
b/docs/system/arm/b-l475e-iot01a.rst
index 72f256ace7..1a021b306a 100644
--- a/docs/system/arm/b-l475e-iot01a.rst
+++ b/docs/system/arm/b-l475e-iot01a.rst
@@ -16,6 +16,7 @@ Currently B-L475E-IOT01A machine's only supports the
following devices:
- Cortex-M4F based STM32L4x5 SoC
- STM32L4x5 EXTI (Extended interrupts and events controller)
+- STM32L4x5 SYSCFG (System configuration controller)
Missing devices
"""""""""""""""
@@ -24,7 +25,6 @@ The B-L475E-IOT01A does *not* support the following devices:
- Reset and clock control (RCC)
- Serial ports (UART)
-- System configuration controller (SYSCFG)
- General-purpose I/Os (GPIO)
- Analog to Digital Converter (ADC)
- SPI controller
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index 3efe3dc2cc..4fc6b29b43 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -90,6 +90,9 @@ config STM32F4XX_EXTI
config STM32L4X5_EXTI
bool
+config STM32L4X5_SYSCFG
+ bool
+
config MIPS_ITU
bool
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 16db6e228d..2ca2ce4b62 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -111,6 +111,7 @@ system_ss.add(when: 'CONFIG_STM32F2XX_SYSCFG', if_true:
files('stm32f2xx_syscfg.
system_ss.add(when: 'CONFIG_STM32F4XX_SYSCFG', if_true:
files('stm32f4xx_syscfg.c'))
system_ss.add(when: 'CONFIG_STM32F4XX_EXTI', if_true:
files('stm32f4xx_exti.c'))
system_ss.add(when: 'CONFIG_STM32L4X5_EXTI', if_true:
files('stm32l4x5_exti.c'))
+system_ss.add(when: 'CONFIG_STM32L4X5_SYSCFG', if_true:
files('stm32l4x5_syscfg.c'))
system_ss.add(when: 'CONFIG_MPS2_FPGAIO', if_true: files('mps2-fpgaio.c'))
system_ss.add(when: 'CONFIG_MPS2_SCC', if_true: files('mps2-scc.c'))
diff --git a/hw/misc/stm32l4x5_syscfg.c b/hw/misc/stm32l4x5_syscfg.c
new file mode 100644
index 0000000000..36ac8956f9
--- /dev/null
+++ b/hw/misc/stm32l4x5_syscfg.c
@@ -0,0 +1,265 @@
+/*
+ * STM32L4x5 SYSCFG (System Configuration Controller)
+ *
+ * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
+ * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ * This work is based on the stm32f4xx_syscfg by Alistair Francis.
+ * Original code is licensed under the MIT License:
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ */
+
+/*
+ * The reference used is the STMicroElectronics RM0351 Reference manual
+ * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
+ *
https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "hw/irq.h"
+#include "migration/vmstate.h"
+#include "hw/misc/stm32l4x5_syscfg.h"
+
+#define SYSCFG_MEMRMP 0x00
+#define SYSCFG_CFGR1 0x04
+#define SYSCFG_EXTICR1 0x08
+#define SYSCFG_EXTICR2 0x0C
+#define SYSCFG_EXTICR3 0x10
+#define SYSCFG_EXTICR4 0x14
+#define SYSCFG_SCSR 0x18
+#define SYSCFG_CFGR2 0x1C
+#define SYSCFG_SWPR 0x20
+#define SYSCFG_SKR 0x24
+#define SYSCFG_SWPR2 0x28
+
+/* 00000000_00000000_00000001_00000111 */
+#define ACTIVABLE_BITS_MEMRP 0x00000107
+
+/* 11111100_11111111_00000001_00000000 */
+#define ACTIVABLE_BITS_CFGR1 0xFCFF0100
+/* 00000000_00000000_00000000_00000001 */
+#define FIREWALL_DISABLE_CFGR1 0x00000001
+
+/* 00000000_00000000_11111111_11111111 */
+#define ACTIVABLE_BITS_EXTICR 0x0000FFFF
+
+/* 00000000_00000000_00000000_00000011 */
+/* #define ACTIVABLE_BITS_SCSR 0x00000003 */
+
+/* 00000000_00000000_00000000_00001111 */
+#define ECC_LOCK_CFGR2 0x0000000F
+/* 00000000_00000000_00000001_00000000 */
+#define SRAM2_PARITY_ERROR_FLAG_CFGR2 0x00000100
+
+/* 00000000_00000000_00000000_11111111 */
+#define ACTIVABLE_BITS_SKR 0x000000FF
+
+static void stm32l4x5_syscfg_hold_reset(Object *obj)
+{
+ Stm32l4x5SyscfgState *s = STM32L4X5_SYSCFG(obj);
+
+ s->memrmp = 0x00000000;
+ s->cfgr1 = 0x7C000001;
+ s->exticr[0] = 0x00000000;
+ s->exticr[1] = 0x00000000;
+ s->exticr[2] = 0x00000000;
+ s->exticr[3] = 0x00000000;
+ s->scsr = 0x00000000;
+ s->cfgr2 = 0x00000000;
+ s->swpr = 0x00000000;
+ s->skr = 0x00000000;
+ s->swpr2 = 0x00000000;
+}
+
+static void stm32l4x5_syscfg_set_irq(void *opaque, int irq, int level)
+{
+ Stm32l4x5SyscfgState *s = opaque;
+ uint8_t gpio = irq / GPIO_NUM_PINS;
+ g_assert(gpio < NUM_GPIOS);
+
+ int line = irq % GPIO_NUM_PINS;
+ int exticr_reg = line / 4;
+ int startbit = (irq % 4) * 4;
+
+ trace_stm32l4x5_syscfg_set_irq(gpio, line, level);
+
+ if (extract32(s->exticr[exticr_reg], startbit, 4) == gpio) {
+ trace_stm32l4x5_syscfg_forward_exti(line);
+ qemu_set_irq(s->gpio_out[line], level);
+ }
+}
+
+static uint64_t stm32l4x5_syscfg_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ Stm32l4x5SyscfgState *s = opaque;
+
+ trace_stm32l4x5_syscfg_read(addr);
+
+ switch (addr) {
+ case SYSCFG_MEMRMP:
+ return s->memrmp;
+ case SYSCFG_CFGR1:
+ return s->cfgr1;
+ case SYSCFG_EXTICR1...SYSCFG_EXTICR4:
+ return s->exticr[(addr - SYSCFG_EXTICR1) / 4];
+ case SYSCFG_SCSR:
+ return s->scsr;
+ case SYSCFG_CFGR2:
+ return s->cfgr2;
+ case SYSCFG_SWPR:
+ return s->swpr;
+ case SYSCFG_SKR:
+ return s->skr;
+ case SYSCFG_SWPR2:
+ return s->swpr2;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+ return 0;
+ }
+}
+static void stm32l4x5_syscfg_write(void *opaque, hwaddr addr,
+ uint64_t val64, unsigned int size)
+{
+ Stm32l4x5SyscfgState *s = opaque;
+ uint32_t value = val64;
+
+ trace_stm32l4x5_syscfg_write(addr, value);
+
+ switch (addr) {
+ case SYSCFG_MEMRMP:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Changing the memory mapping isn't supported\n",
+ __func__);
+ s->memrmp = value & ACTIVABLE_BITS_MEMRP;
+ return;
+ case SYSCFG_CFGR1:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Functions in CFGRx aren't supported\n",
+ __func__);
+ /* bit 0 (firewall dis.) is cleared by software, set only by reset. */
+ s->cfgr1 = (s->cfgr1 & value & FIREWALL_DISABLE_CFGR1) |
+ (value & ACTIVABLE_BITS_CFGR1);
+ return;
+ case SYSCFG_EXTICR1...SYSCFG_EXTICR4:
+ s->exticr[(addr - SYSCFG_EXTICR1) / 4] =
+ (value & ACTIVABLE_BITS_EXTICR);
+ return;
+ case SYSCFG_SCSR:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Erasing SRAM2 isn't supported\n",
+ __func__);
+ /*
+ * only non reserved bits are :
+ * bit 0 (write-protected by a passkey), bit 1 (meant to be read)
+ * so it serves no purpose yet to add :
+ * s->scsr = value & 0x3;
+ */
+ return;
+ case SYSCFG_CFGR2:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Functions in CFGRx aren't supported\n",
+ __func__);
+ /* bit 8 (SRAM2 PEF) is cleared by software by writing a '1'.*/
+ /* bits[3:0] (ECC Lock) are set by software, cleared only by reset.*/
+ s->cfgr2 = (s->cfgr2 | (value & ECC_LOCK_CFGR2)) &
+ ~(value & SRAM2_PARITY_ERROR_FLAG_CFGR2);
+ return;
+ case SYSCFG_SWPR:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Write protecting SRAM2 isn't supported\n",
+ __func__);
+ /* These bits are set by software and cleared only by reset.*/
+ s->swpr |= value;
+ return;
+ case SYSCFG_SKR:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Erasing SRAM2 isn't supported\n",
+ __func__);
+ s->skr = value & ACTIVABLE_BITS_SKR;
+ return;
+ case SYSCFG_SWPR2:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Write protecting SRAM2 isn't supported\n",
+ __func__);
+ /* These bits are set by software and cleared only by reset.*/
+ s->swpr2 |= value;
+ return;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
+ }
+}
+
+static const MemoryRegionOps stm32l4x5_syscfg_ops = {
+ .read = stm32l4x5_syscfg_read,
+ .write = stm32l4x5_syscfg_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl.min_access_size = 4,
+ .impl.max_access_size = 4,
+ .impl.unaligned = false,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 4,
+ .valid.unaligned = false,
+};
+
+static void stm32l4x5_syscfg_init(Object *obj)
+{
+ Stm32l4x5SyscfgState *s = STM32L4X5_SYSCFG(obj);
+
+ memory_region_init_io(&s->mmio, obj, &stm32l4x5_syscfg_ops, s,
+ TYPE_STM32L4X5_SYSCFG, 0x400);
+ sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+
+ qdev_init_gpio_in(DEVICE(obj), stm32l4x5_syscfg_set_irq,
+ GPIO_NUM_PINS * NUM_GPIOS);
+ qdev_init_gpio_out(DEVICE(obj), s->gpio_out, GPIO_NUM_PINS);
+}
+
+static const VMStateDescription vmstate_stm32l4x5_syscfg = {
+ .name = TYPE_STM32L4X5_SYSCFG,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(memrmp, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32(cfgr1, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32_ARRAY(exticr, Stm32l4x5SyscfgState,
+ SYSCFG_NUM_EXTICR),
+ VMSTATE_UINT32(scsr, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32(cfgr2, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32(swpr, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32(skr, Stm32l4x5SyscfgState),
+ VMSTATE_UINT32(swpr2, Stm32l4x5SyscfgState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void stm32l4x5_syscfg_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+
+ dc->vmsd = &vmstate_stm32l4x5_syscfg;
+ rc->phases.hold = stm32l4x5_syscfg_hold_reset;
+}
+
+static const TypeInfo stm32l4x5_syscfg_info[] = {
+ {
+ .name = TYPE_STM32L4X5_SYSCFG,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(Stm32l4x5SyscfgState),
+ .instance_init = stm32l4x5_syscfg_init,
+ .class_init = stm32l4x5_syscfg_class_init,
+ }
+};
+
+DEFINE_TYPES(stm32l4x5_syscfg_info)
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 2f01c62c0e..60d0a14e74 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -163,6 +163,12 @@ stm32f4xx_exti_set_irq(int irq, int level) "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 ""
+# stm32l4x5_syscfg.c
+stm32l4x5_syscfg_set_irq(int gpio, int line, int level) "irq from GPIO: %d,
line: %d, level: %d"
+stm32l4x5_syscfg_forward_exti(int irq) "irq %d forwarded to EXTI"
+stm32l4x5_syscfg_read(uint64_t addr) "reg read: addr: 0x%" PRIx64 " "
+stm32l4x5_syscfg_write(uint64_t addr, uint64_t data) "reg write: addr: 0x%"
PRIx64 " val: 0x%" PRIx64 ""
+
# stm32l4x5_exti.c
stm32l4x5_exti_set_irq(int irq, int level) "Set EXTI: %d to %d"
stm32l4x5_exti_read(uint64_t addr, uint64_t data) "reg read: addr: 0x%" PRIx64
" val: 0x%" PRIx64 ""
diff --git a/include/hw/misc/stm32l4x5_syscfg.h
b/include/hw/misc/stm32l4x5_syscfg.h
new file mode 100644
index 0000000000..76bdcf5189
--- /dev/null
+++ b/include/hw/misc/stm32l4x5_syscfg.h
@@ -0,0 +1,54 @@
+/*
+ * STM32L4x5 SYSCFG (System Configuration Controller)
+ *
+ * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
+ * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ * This work is based on the stm32f4xx_syscfg by Alistair Francis.
+ * Original code is licensed under the MIT License:
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ */
+
+/*
+ * The reference used is the STMicroElectronics RM0351 Reference manual
+ * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
+ *
https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
+ */
+
+#ifndef HW_STM32L4X5_SYSCFG_H
+#define HW_STM32L4X5_SYSCFG_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+
+#define TYPE_STM32L4X5_SYSCFG "stm32l4x5-syscfg"
+OBJECT_DECLARE_SIMPLE_TYPE(Stm32l4x5SyscfgState, STM32L4X5_SYSCFG)
+
+#define NUM_GPIOS 8
+#define GPIO_NUM_PINS 16
+#define SYSCFG_NUM_EXTICR 4
+
+struct Stm32l4x5SyscfgState {
+ SysBusDevice parent_obj;
+
+ MemoryRegion mmio;
+
+ uint32_t memrmp;
+ uint32_t cfgr1;
+ uint32_t exticr[SYSCFG_NUM_EXTICR];
+ uint32_t scsr;
+ uint32_t cfgr2;
+ uint32_t swpr;
+ uint32_t skr;
+ uint32_t swpr2;
+
+ qemu_irq gpio_out[16];
+};
+
+#endif
--
2.43.0