hw/misc: Implement STM32L4x5 EXTI
Although very similar to the STM32F4xx EXTI, STM32L4x5 EXTI generates more than 32 event/interrupt requests and thus uses more registers than STM32F4xx EXTI which generates 23 event/interrupt requests. Acked-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr> Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20240109160658.311932-2-ines.varhol@telecom-paris.fr Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Inès Varhol
Peter Maydell
parent
8cf1da7291
commit
c9948fdd02
@ -12,17 +12,16 @@ USART, I2C, SPI, CAN and USB OTG, as well as a variety of sensors.
|
||||
Supported devices
|
||||
"""""""""""""""""
|
||||
|
||||
Currently, B-L475E-IOT01A machine's implementation is minimal,
|
||||
it only supports the following device:
|
||||
Currently B-L475E-IOT01A machine's only supports the following devices:
|
||||
|
||||
- Cortex-M4F based STM32L4x5 SoC
|
||||
- STM32L4x5 EXTI (Extended interrupts and events controller)
|
||||
|
||||
Missing devices
|
||||
"""""""""""""""
|
||||
|
||||
The B-L475E-IOT01A does *not* support the following devices:
|
||||
|
||||
- Extended interrupts and events controller (EXTI)
|
||||
- Reset and clock control (RCC)
|
||||
- Serial ports (UART)
|
||||
- System configuration controller (SYSCFG)
|
||||
|
||||
@ -87,6 +87,9 @@ config STM32F4XX_SYSCFG
|
||||
config STM32F4XX_EXTI
|
||||
bool
|
||||
|
||||
config STM32L4X5_EXTI
|
||||
bool
|
||||
|
||||
config MIPS_ITU
|
||||
bool
|
||||
|
||||
|
||||
@ -110,6 +110,7 @@ system_ss.add(when: 'CONFIG_XLNX_VERSAL_TRNG', if_true: files(
|
||||
system_ss.add(when: 'CONFIG_STM32F2XX_SYSCFG', if_true: files('stm32f2xx_syscfg.c'))
|
||||
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_MPS2_FPGAIO', if_true: files('mps2-fpgaio.c'))
|
||||
system_ss.add(when: 'CONFIG_MPS2_SCC', if_true: files('mps2-scc.c'))
|
||||
|
||||
|
||||
290
hw/misc/stm32l4x5_exti.c
Normal file
290
hw/misc/stm32l4x5_exti.c
Normal file
@ -0,0 +1,290 @@
|
||||
/*
|
||||
* STM32L4x5 EXTI (Extended interrupts and events controller)
|
||||
*
|
||||
* Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
|
||||
* Copyright (c) 2023 Samuel Tardieu <samuel.tardieu@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_exti 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_exti.h"
|
||||
|
||||
#define EXTI_IMR1 0x00
|
||||
#define EXTI_EMR1 0x04
|
||||
#define EXTI_RTSR1 0x08
|
||||
#define EXTI_FTSR1 0x0C
|
||||
#define EXTI_SWIER1 0x10
|
||||
#define EXTI_PR1 0x14
|
||||
#define EXTI_IMR2 0x20
|
||||
#define EXTI_EMR2 0x24
|
||||
#define EXTI_RTSR2 0x28
|
||||
#define EXTI_FTSR2 0x2C
|
||||
#define EXTI_SWIER2 0x30
|
||||
#define EXTI_PR2 0x34
|
||||
|
||||
#define EXTI_NUM_GPIO_EVENT_IN_LINES 16
|
||||
#define EXTI_MAX_IRQ_PER_BANK 32
|
||||
#define EXTI_IRQS_BANK0 32
|
||||
#define EXTI_IRQS_BANK1 8
|
||||
|
||||
static const unsigned irqs_per_bank[EXTI_NUM_REGISTER] = {
|
||||
EXTI_IRQS_BANK0,
|
||||
EXTI_IRQS_BANK1,
|
||||
};
|
||||
|
||||
static const uint32_t exti_romask[EXTI_NUM_REGISTER] = {
|
||||
0xff820000, /* 0b11111111_10000010_00000000_00000000 */
|
||||
0x00000087, /* 0b00000000_00000000_00000000_10000111 */
|
||||
};
|
||||
|
||||
static unsigned regbank_index_by_irq(unsigned irq)
|
||||
{
|
||||
return irq >= EXTI_MAX_IRQ_PER_BANK ? 1 : 0;
|
||||
}
|
||||
|
||||
static unsigned regbank_index_by_addr(hwaddr addr)
|
||||
{
|
||||
return addr >= EXTI_IMR2 ? 1 : 0;
|
||||
}
|
||||
|
||||
static unsigned valid_mask(unsigned bank)
|
||||
{
|
||||
return MAKE_64BIT_MASK(0, irqs_per_bank[bank]);
|
||||
}
|
||||
|
||||
static unsigned configurable_mask(unsigned bank)
|
||||
{
|
||||
return valid_mask(bank) & ~exti_romask[bank];
|
||||
}
|
||||
|
||||
static void stm32l4x5_exti_reset_hold(Object *obj)
|
||||
{
|
||||
Stm32l4x5ExtiState *s = STM32L4X5_EXTI(obj);
|
||||
|
||||
for (unsigned bank = 0; bank < EXTI_NUM_REGISTER; bank++) {
|
||||
s->imr[bank] = exti_romask[bank];
|
||||
s->emr[bank] = 0x00000000;
|
||||
s->rtsr[bank] = 0x00000000;
|
||||
s->ftsr[bank] = 0x00000000;
|
||||
s->swier[bank] = 0x00000000;
|
||||
s->pr[bank] = 0x00000000;
|
||||
}
|
||||
}
|
||||
|
||||
static void stm32l4x5_exti_set_irq(void *opaque, int irq, int level)
|
||||
{
|
||||
Stm32l4x5ExtiState *s = opaque;
|
||||
const unsigned bank = regbank_index_by_irq(irq);
|
||||
const int oirq = irq;
|
||||
|
||||
trace_stm32l4x5_exti_set_irq(irq, level);
|
||||
|
||||
/* Shift the value to enable access in x2 registers. */
|
||||
irq %= EXTI_MAX_IRQ_PER_BANK;
|
||||
|
||||
/* If the interrupt is masked, pr won't be raised */
|
||||
if (!extract32(s->imr[bank], irq, 1)) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (((1 << irq) & s->rtsr[bank]) && level) {
|
||||
/* Rising Edge */
|
||||
s->pr[bank] |= 1 << irq;
|
||||
qemu_irq_pulse(s->irq[oirq]);
|
||||
} else if (((1 << irq) & s->ftsr[bank]) && !level) {
|
||||
/* Falling Edge */
|
||||
s->pr[bank] |= 1 << irq;
|
||||
qemu_irq_pulse(s->irq[oirq]);
|
||||
}
|
||||
/*
|
||||
* In the following situations :
|
||||
* - falling edge but rising trigger selected
|
||||
* - rising edge but falling trigger selected
|
||||
* - no trigger selected
|
||||
* No action is required
|
||||
*/
|
||||
}
|
||||
|
||||
static uint64_t stm32l4x5_exti_read(void *opaque, hwaddr addr,
|
||||
unsigned int size)
|
||||
{
|
||||
Stm32l4x5ExtiState *s = opaque;
|
||||
uint32_t r = 0;
|
||||
const unsigned bank = regbank_index_by_addr(addr);
|
||||
|
||||
switch (addr) {
|
||||
case EXTI_IMR1:
|
||||
case EXTI_IMR2:
|
||||
r = s->imr[bank];
|
||||
break;
|
||||
case EXTI_EMR1:
|
||||
case EXTI_EMR2:
|
||||
r = s->emr[bank];
|
||||
break;
|
||||
case EXTI_RTSR1:
|
||||
case EXTI_RTSR2:
|
||||
r = s->rtsr[bank];
|
||||
break;
|
||||
case EXTI_FTSR1:
|
||||
case EXTI_FTSR2:
|
||||
r = s->ftsr[bank];
|
||||
break;
|
||||
case EXTI_SWIER1:
|
||||
case EXTI_SWIER2:
|
||||
r = s->swier[bank];
|
||||
break;
|
||||
case EXTI_PR1:
|
||||
case EXTI_PR2:
|
||||
r = s->pr[bank];
|
||||
break;
|
||||
|
||||
default:
|
||||
qemu_log_mask(LOG_GUEST_ERROR,
|
||||
"STM32L4X5_exti_read: Bad offset 0x%" HWADDR_PRIx "\n",
|
||||
addr);
|
||||
break;
|
||||
}
|
||||
|
||||
trace_stm32l4x5_exti_read(addr, r);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static void stm32l4x5_exti_write(void *opaque, hwaddr addr,
|
||||
uint64_t val64, unsigned int size)
|
||||
{
|
||||
Stm32l4x5ExtiState *s = opaque;
|
||||
const unsigned bank = regbank_index_by_addr(addr);
|
||||
|
||||
trace_stm32l4x5_exti_write(addr, val64);
|
||||
|
||||
switch (addr) {
|
||||
case EXTI_IMR1:
|
||||
case EXTI_IMR2:
|
||||
s->imr[bank] = val64 & valid_mask(bank);
|
||||
return;
|
||||
case EXTI_EMR1:
|
||||
case EXTI_EMR2:
|
||||
s->emr[bank] = val64 & valid_mask(bank);
|
||||
return;
|
||||
case EXTI_RTSR1:
|
||||
case EXTI_RTSR2:
|
||||
s->rtsr[bank] = val64 & configurable_mask(bank);
|
||||
return;
|
||||
case EXTI_FTSR1:
|
||||
case EXTI_FTSR2:
|
||||
s->ftsr[bank] = val64 & configurable_mask(bank);
|
||||
return;
|
||||
case EXTI_SWIER1:
|
||||
case EXTI_SWIER2: {
|
||||
const uint32_t set = val64 & configurable_mask(bank);
|
||||
const uint32_t pend = set & ~s->swier[bank] & s->imr[bank] &
|
||||
~s->pr[bank];
|
||||
s->swier[bank] = set;
|
||||
s->pr[bank] |= pend;
|
||||
for (unsigned i = 0; i < irqs_per_bank[bank]; i++) {
|
||||
if (extract32(pend, i, 1)) {
|
||||
qemu_irq_pulse(s->irq[i + 32 * bank]);
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
case EXTI_PR1:
|
||||
case EXTI_PR2: {
|
||||
const uint32_t cleared = s->pr[bank] & val64 & configurable_mask(bank);
|
||||
/* This bit is cleared by writing a 1 to it */
|
||||
s->pr[bank] &= ~cleared;
|
||||
/* Software triggered interrupts are cleared as well */
|
||||
s->swier[bank] &= ~cleared;
|
||||
return;
|
||||
}
|
||||
default:
|
||||
qemu_log_mask(LOG_GUEST_ERROR,
|
||||
"STM32L4X5_exti_write: Bad offset 0x%" HWADDR_PRIx "\n",
|
||||
addr);
|
||||
}
|
||||
}
|
||||
|
||||
static const MemoryRegionOps stm32l4x5_exti_ops = {
|
||||
.read = stm32l4x5_exti_read,
|
||||
.write = stm32l4x5_exti_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_exti_init(Object *obj)
|
||||
{
|
||||
Stm32l4x5ExtiState *s = STM32L4X5_EXTI(obj);
|
||||
|
||||
for (size_t i = 0; i < EXTI_NUM_INTERRUPT_OUT_LINES; i++) {
|
||||
sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq[i]);
|
||||
}
|
||||
|
||||
memory_region_init_io(&s->mmio, obj, &stm32l4x5_exti_ops, s,
|
||||
TYPE_STM32L4X5_EXTI, 0x400);
|
||||
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
|
||||
|
||||
qdev_init_gpio_in(DEVICE(obj), stm32l4x5_exti_set_irq,
|
||||
EXTI_NUM_GPIO_EVENT_IN_LINES);
|
||||
}
|
||||
|
||||
static const VMStateDescription vmstate_stm32l4x5_exti = {
|
||||
.name = TYPE_STM32L4X5_EXTI,
|
||||
.version_id = 1,
|
||||
.minimum_version_id = 1,
|
||||
.fields = (VMStateField[]) {
|
||||
VMSTATE_UINT32_ARRAY(imr, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_UINT32_ARRAY(emr, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_UINT32_ARRAY(rtsr, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_UINT32_ARRAY(ftsr, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_UINT32_ARRAY(swier, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_UINT32_ARRAY(pr, Stm32l4x5ExtiState, EXTI_NUM_REGISTER),
|
||||
VMSTATE_END_OF_LIST()
|
||||
}
|
||||
};
|
||||
|
||||
static void stm32l4x5_exti_class_init(ObjectClass *klass, void *data)
|
||||
{
|
||||
DeviceClass *dc = DEVICE_CLASS(klass);
|
||||
ResettableClass *rc = RESETTABLE_CLASS(klass);
|
||||
|
||||
dc->vmsd = &vmstate_stm32l4x5_exti;
|
||||
rc->phases.hold = stm32l4x5_exti_reset_hold;
|
||||
}
|
||||
|
||||
static const TypeInfo stm32l4x5_exti_types[] = {
|
||||
{
|
||||
.name = TYPE_STM32L4X5_EXTI,
|
||||
.parent = TYPE_SYS_BUS_DEVICE,
|
||||
.instance_size = sizeof(Stm32l4x5ExtiState),
|
||||
.instance_init = stm32l4x5_exti_init,
|
||||
.class_init = stm32l4x5_exti_class_init,
|
||||
}
|
||||
};
|
||||
|
||||
DEFINE_TYPES(stm32l4x5_exti_types)
|
||||
@ -163,6 +163,11 @@ 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_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 ""
|
||||
stm32l4x5_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"
|
||||
|
||||
51
include/hw/misc/stm32l4x5_exti.h
Normal file
51
include/hw/misc/stm32l4x5_exti.h
Normal file
@ -0,0 +1,51 @@
|
||||
/*
|
||||
* STM32L4x5 EXTI (Extended interrupts and events 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_exti 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_EXTI_H
|
||||
#define HW_STM32L4X5_EXTI_H
|
||||
|
||||
#include "hw/sysbus.h"
|
||||
#include "qom/object.h"
|
||||
|
||||
#define TYPE_STM32L4X5_EXTI "stm32l4x5-exti"
|
||||
OBJECT_DECLARE_SIMPLE_TYPE(Stm32l4x5ExtiState, STM32L4X5_EXTI)
|
||||
|
||||
#define EXTI_NUM_INTERRUPT_OUT_LINES 40
|
||||
#define EXTI_NUM_REGISTER 2
|
||||
|
||||
struct Stm32l4x5ExtiState {
|
||||
SysBusDevice parent_obj;
|
||||
|
||||
MemoryRegion mmio;
|
||||
|
||||
uint32_t imr[EXTI_NUM_REGISTER];
|
||||
uint32_t emr[EXTI_NUM_REGISTER];
|
||||
uint32_t rtsr[EXTI_NUM_REGISTER];
|
||||
uint32_t ftsr[EXTI_NUM_REGISTER];
|
||||
uint32_t swier[EXTI_NUM_REGISTER];
|
||||
uint32_t pr[EXTI_NUM_REGISTER];
|
||||
|
||||
qemu_irq irq[EXTI_NUM_INTERRUPT_OUT_LINES];
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user