hw/arm/msf2-soc.c - qemu - Git at Google

 /*
  * SmartFusion2 SoC emulation.
  *
  * Copyright (c) 2017-2020 Subbaraya Sundeep <sundeep.lkml@gmail.com>
  *
  * 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/units.h"
 #include "qapi/error.h"
 #include "exec/address-spaces.h"
 #include "hw/char/serial.h"
 #include "hw/arm/msf2-soc.h"
 #include "hw/misc/unimp.h"
 #include "hw/qdev-clock.h"
 #include "sysemu/sysemu.h"

 #define MSF2_TIMER_BASE       0x40004000
 #define MSF2_SYSREG_BASE      0x40038000
 #define MSF2_EMAC_BASE        0x40041000

 #define ENVM_BASE_ADDRESS     0x60000000

 #define SRAM_BASE_ADDRESS     0x20000000

 #define MSF2_EMAC_IRQ         12

 #define MSF2_ENVM_MAX_SIZE    (512 * KiB)

 /*
  * eSRAM max size is 80k without SECDED(Single error correction and
  * dual error detection) feature and 64k with SECDED.
  * We do not support SECDED now.
  */
 #define MSF2_ESRAM_MAX_SIZE       (80 * KiB)

 static const uint32_t spi_addr[MSF2_NUM_SPIS] = { 0x40001000 , 0x40011000 };
 static const uint32_t uart_addr[MSF2_NUM_UARTS] = { 0x40000000 , 0x40010000 };

 static const int spi_irq[MSF2_NUM_SPIS] = { 2, 3 };
 static const int uart_irq[MSF2_NUM_UARTS] = { 10, 11 };
 static const int timer_irq[MSF2_NUM_TIMERS] = { 14, 15 };

 static void m2sxxx_soc_initfn(Object *obj)
 {
     MSF2State *s = MSF2_SOC(obj);
     int i;

     object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);

     object_initialize_child(obj, "sysreg", &s->sysreg, TYPE_MSF2_SYSREG);

     object_initialize_child(obj, "timer", &s->timer, TYPE_MSS_TIMER);

     for (i = 0; i < MSF2_NUM_SPIS; i++) {
         object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_MSS_SPI);
     }

     object_initialize_child(obj, "emac", &s->emac, TYPE_MSS_EMAC);

     s->m3clk = qdev_init_clock_in(DEVICE(obj), "m3clk", NULL, NULL, 0);
     s->refclk = qdev_init_clock_in(DEVICE(obj), "refclk", NULL, NULL, 0);
 }

 static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
 {
     MSF2State *s = MSF2_SOC(dev_soc);
     DeviceState *dev, *armv7m;
     SysBusDevice *busdev;
     int i;

     MemoryRegion *system_memory = get_system_memory();

     if (!clock_has_source(s->m3clk)) {
         error_setg(errp, "m3clk must be wired up by the board code");
         return;
     }

     /*
      * We use s->refclk internally and only define it with qdev_init_clock_in()
      * so it is correctly parented and not leaked on an init/deinit; it is not
      * intended as an externally exposed clock.
      */
     if (clock_has_source(s->refclk)) {
         error_setg(errp, "refclk must not be wired up by the board code");
         return;
     }

     /*
      * TODO: ideally we should model the SoC SYSTICK_CR register at 0xe0042038,
      * which allows the guest to program the divisor between the m3clk and
      * the systick refclk to either /4, /8, /16 or /32, as well as setting
      * the value the guest can read in the STCALIB register. Currently we
      * implement the divisor as a fixed /32, which matches the reset value
      * of SYSTICK_CR.
      */
     clock_set_mul_div(s->refclk, 32, 1);
     clock_set_source(s->refclk, s->m3clk);

     memory_region_init_rom(&s->nvm, OBJECT(dev_soc), "MSF2.eNVM", s->envm_size,
                            &error_fatal);
     /*
      * On power-on, the eNVM region 0x60000000 is automatically
      * remapped to the Cortex-M3 processor executable region
      * start address (0x0). We do not support remapping other eNVM,
      * eSRAM and DDR regions by guest(via Sysreg) currently.
      */
     memory_region_init_alias(&s->nvm_alias, OBJECT(dev_soc), "MSF2.eNVM",
                              &s->nvm, 0, s->envm_size);

     memory_region_add_subregion(system_memory, ENVM_BASE_ADDRESS, &s->nvm);
     memory_region_add_subregion(system_memory, 0, &s->nvm_alias);

     memory_region_init_ram(&s->sram, NULL, "MSF2.eSRAM", s->esram_size,
                            &error_fatal);
     memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, &s->sram);

     armv7m = DEVICE(&s->armv7m);
     qdev_prop_set_uint32(armv7m, "num-irq", 81);
     qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     qdev_connect_clock_in(armv7m, "cpuclk", s->m3clk);
     qdev_connect_clock_in(armv7m, "refclk", s->refclk);
     object_property_set_link(OBJECT(&s->armv7m), "memory",
                              OBJECT(get_system_memory()), &error_abort);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
         return;
     }

     for (i = 0; i < MSF2_NUM_UARTS; i++) {
         if (serial_hd(i)) {
             serial_mm_init(get_system_memory(), uart_addr[i], 2,
                            qdev_get_gpio_in(armv7m, uart_irq[i]),
                            115200, serial_hd(i), DEVICE_NATIVE_ENDIAN);
         }
     }

     dev = DEVICE(&s->timer);
     /*
      * APB0 clock is the timer input clock.
      * TODO: ideally the MSF2 timer device should use a Clock rather than a
      * clock-frequency integer property.
      */
     qdev_prop_set_uint32(dev, "clock-frequency",
                          clock_get_hz(s->m3clk) / s->apb0div);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer), errp)) {
         return;
     }
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(busdev, 0, MSF2_TIMER_BASE);
     sysbus_connect_irq(busdev, 0,
                            qdev_get_gpio_in(armv7m, timer_irq[0]));
     sysbus_connect_irq(busdev, 1,
                            qdev_get_gpio_in(armv7m, timer_irq[1]));

     dev = DEVICE(&s->sysreg);
     qdev_prop_set_uint32(dev, "apb0divisor", s->apb0div);
     qdev_prop_set_uint32(dev, "apb1divisor", s->apb1div);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysreg), errp)) {
         return;
     }
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(busdev, 0, MSF2_SYSREG_BASE);

     for (i = 0; i < MSF2_NUM_SPIS; i++) {
         gchar *bus_name;

         if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
             return;
         }

         sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi[i]), 0, spi_addr[i]);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi[i]), 0,
                            qdev_get_gpio_in(armv7m, spi_irq[i]));

         /* Alias controller SPI bus to the SoC itself */
         bus_name = g_strdup_printf("spi%d", i);
         object_property_add_alias(OBJECT(s), bus_name,
                                   OBJECT(&s->spi[i]), "spi");
         g_free(bus_name);
     }

     dev = DEVICE(&s->emac);
     qemu_configure_nic_device(dev, true, NULL);
     object_property_set_link(OBJECT(&s->emac), "ahb-bus",
                              OBJECT(get_system_memory()), &error_abort);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->emac), errp)) {
         return;
     }
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(busdev, 0, MSF2_EMAC_BASE);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(armv7m, MSF2_EMAC_IRQ));

     /* Below devices are not modelled yet. */
     create_unimplemented_device("i2c_0", 0x40002000, 0x1000);
     create_unimplemented_device("dma", 0x40003000, 0x1000);
     create_unimplemented_device("watchdog", 0x40005000, 0x1000);
     create_unimplemented_device("i2c_1", 0x40012000, 0x1000);
     create_unimplemented_device("gpio", 0x40013000, 0x1000);
     create_unimplemented_device("hs-dma", 0x40014000, 0x1000);
     create_unimplemented_device("can", 0x40015000, 0x1000);
     create_unimplemented_device("rtc", 0x40017000, 0x1000);
     create_unimplemented_device("apb_config", 0x40020000, 0x10000);
     create_unimplemented_device("usb", 0x40043000, 0x1000);
 }

 static Property m2sxxx_soc_properties[] = {
     /*
      * part name specifies the type of SmartFusion2 device variant(this
      * property is for information purpose only.
      */
     DEFINE_PROP_STRING("part-name", MSF2State, part_name),
     DEFINE_PROP_UINT64("eNVM-size", MSF2State, envm_size, MSF2_ENVM_MAX_SIZE),
     DEFINE_PROP_UINT64("eSRAM-size", MSF2State, esram_size,
                         MSF2_ESRAM_MAX_SIZE),
     /* default divisors in Libero GUI */
     DEFINE_PROP_UINT8("apb0div", MSF2State, apb0div, 2),
     DEFINE_PROP_UINT8("apb1div", MSF2State, apb1div, 2),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void m2sxxx_soc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->realize = m2sxxx_soc_realize;
     device_class_set_props(dc, m2sxxx_soc_properties);
 }

 static const TypeInfo m2sxxx_soc_info = {
     .name          = TYPE_MSF2_SOC,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(MSF2State),
     .instance_init = m2sxxx_soc_initfn,
     .class_init    = m2sxxx_soc_class_init,
 };

 static void m2sxxx_soc_types(void)
 {
     type_register_static(&m2sxxx_soc_info);
 }

 type_init(m2sxxx_soc_types)
	/*
	* SmartFusion2 SoC emulation.
	*
	* Copyright (c) 2017-2020 Subbaraya Sundeep <sundeep.lkml@gmail.com>
	*
	* 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/units.h"
	#include "qapi/error.h"
	#include "exec/address-spaces.h"
	#include "hw/char/serial.h"
	#include "hw/arm/msf2-soc.h"
	#include "hw/misc/unimp.h"
	#include "hw/qdev-clock.h"
	#include "sysemu/sysemu.h"

	#define MSF2_TIMER_BASE 0x40004000
	#define MSF2_SYSREG_BASE 0x40038000
	#define MSF2_EMAC_BASE 0x40041000

	#define ENVM_BASE_ADDRESS 0x60000000

	#define SRAM_BASE_ADDRESS 0x20000000

	#define MSF2_EMAC_IRQ 12

	#define MSF2_ENVM_MAX_SIZE (512 * KiB)

	/*
	* eSRAM max size is 80k without SECDED(Single error correction and
	* dual error detection) feature and 64k with SECDED.
	* We do not support SECDED now.
	*/
	#define MSF2_ESRAM_MAX_SIZE (80 * KiB)

	static const uint32_t spi_addr[MSF2_NUM_SPIS] = { 0x40001000 , 0x40011000 };
	static const uint32_t uart_addr[MSF2_NUM_UARTS] = { 0x40000000 , 0x40010000 };

	static const int spi_irq[MSF2_NUM_SPIS] = { 2, 3 };
	static const int uart_irq[MSF2_NUM_UARTS] = { 10, 11 };
	static const int timer_irq[MSF2_NUM_TIMERS] = { 14, 15 };

	static void m2sxxx_soc_initfn(Object *obj)
	{
	MSF2State *s = MSF2_SOC(obj);
	int i;

	object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);

	object_initialize_child(obj, "sysreg", &s->sysreg, TYPE_MSF2_SYSREG);

	object_initialize_child(obj, "timer", &s->timer, TYPE_MSS_TIMER);

	for (i = 0; i < MSF2_NUM_SPIS; i++) {
	object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_MSS_SPI);
	}

	object_initialize_child(obj, "emac", &s->emac, TYPE_MSS_EMAC);

	s->m3clk = qdev_init_clock_in(DEVICE(obj), "m3clk", NULL, NULL, 0);
	s->refclk = qdev_init_clock_in(DEVICE(obj), "refclk", NULL, NULL, 0);
	}

	static void m2sxxx_soc_realize(DeviceState dev_soc, Error *errp)
	{
	MSF2State *s = MSF2_SOC(dev_soc);
	DeviceState dev, armv7m;
	SysBusDevice *busdev;
	int i;

	MemoryRegion *system_memory = get_system_memory();

	if (!clock_has_source(s->m3clk)) {
	error_setg(errp, "m3clk must be wired up by the board code");
	return;
	}

	/*
	* We use s->refclk internally and only define it with qdev_init_clock_in()
	* so it is correctly parented and not leaked on an init/deinit; it is not
	* intended as an externally exposed clock.
	*/
	if (clock_has_source(s->refclk)) {
	error_setg(errp, "refclk must not be wired up by the board code");
	return;
	}

	/*
	* TODO: ideally we should model the SoC SYSTICK_CR register at 0xe0042038,
	* which allows the guest to program the divisor between the m3clk and
	* the systick refclk to either /4, /8, /16 or /32, as well as setting
	* the value the guest can read in the STCALIB register. Currently we
	* implement the divisor as a fixed /32, which matches the reset value
	* of SYSTICK_CR.
	*/
	clock_set_mul_div(s->refclk, 32, 1);
	clock_set_source(s->refclk, s->m3clk);

	memory_region_init_rom(&s->nvm, OBJECT(dev_soc), "MSF2.eNVM", s->envm_size,
	&error_fatal);
	/*
	* On power-on, the eNVM region 0x60000000 is automatically
	* remapped to the Cortex-M3 processor executable region
	* start address (0x0). We do not support remapping other eNVM,
	* eSRAM and DDR regions by guest(via Sysreg) currently.
	*/
	memory_region_init_alias(&s->nvm_alias, OBJECT(dev_soc), "MSF2.eNVM",
	&s->nvm, 0, s->envm_size);

	memory_region_add_subregion(system_memory, ENVM_BASE_ADDRESS, &s->nvm);
	memory_region_add_subregion(system_memory, 0, &s->nvm_alias);

	memory_region_init_ram(&s->sram, NULL, "MSF2.eSRAM", s->esram_size,
	&error_fatal);
	memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, &s->sram);

	armv7m = DEVICE(&s->armv7m);
	qdev_prop_set_uint32(armv7m, "num-irq", 81);
	qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
	qdev_prop_set_bit(armv7m, "enable-bitband", true);
	qdev_connect_clock_in(armv7m, "cpuclk", s->m3clk);
	qdev_connect_clock_in(armv7m, "refclk", s->refclk);
	object_property_set_link(OBJECT(&s->armv7m), "memory",
	OBJECT(get_system_memory()), &error_abort);
	if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
	return;
	}

	for (i = 0; i < MSF2_NUM_UARTS; i++) {
	if (serial_hd(i)) {
	serial_mm_init(get_system_memory(), uart_addr[i], 2,
	qdev_get_gpio_in(armv7m, uart_irq[i]),
	115200, serial_hd(i), DEVICE_NATIVE_ENDIAN);
	}
	}

	dev = DEVICE(&s->timer);
	/*
	* APB0 clock is the timer input clock.
	* TODO: ideally the MSF2 timer device should use a Clock rather than a
	* clock-frequency integer property.
	*/
	qdev_prop_set_uint32(dev, "clock-frequency",
	clock_get_hz(s->m3clk) / s->apb0div);
	if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer), errp)) {
	return;
	}
	busdev = SYS_BUS_DEVICE(dev);
	sysbus_mmio_map(busdev, 0, MSF2_TIMER_BASE);
	sysbus_connect_irq(busdev, 0,
	qdev_get_gpio_in(armv7m, timer_irq[0]));
	sysbus_connect_irq(busdev, 1,
	qdev_get_gpio_in(armv7m, timer_irq[1]));

	dev = DEVICE(&s->sysreg);
	qdev_prop_set_uint32(dev, "apb0divisor", s->apb0div);
	qdev_prop_set_uint32(dev, "apb1divisor", s->apb1div);
	if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysreg), errp)) {
	return;
	}
	busdev = SYS_BUS_DEVICE(dev);
	sysbus_mmio_map(busdev, 0, MSF2_SYSREG_BASE);

	for (i = 0; i < MSF2_NUM_SPIS; i++) {
	gchar *bus_name;

	if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
	return;
	}

	sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi[i]), 0, spi_addr[i]);
	sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi[i]), 0,
	qdev_get_gpio_in(armv7m, spi_irq[i]));

	/* Alias controller SPI bus to the SoC itself */
	bus_name = g_strdup_printf("spi%d", i);
	object_property_add_alias(OBJECT(s), bus_name,
	OBJECT(&s->spi[i]), "spi");
	g_free(bus_name);
	}

	dev = DEVICE(&s->emac);
	qemu_configure_nic_device(dev, true, NULL);
	object_property_set_link(OBJECT(&s->emac), "ahb-bus",
	OBJECT(get_system_memory()), &error_abort);
	if (!sysbus_realize(SYS_BUS_DEVICE(&s->emac), errp)) {
	return;
	}
	busdev = SYS_BUS_DEVICE(dev);
	sysbus_mmio_map(busdev, 0, MSF2_EMAC_BASE);
	sysbus_connect_irq(busdev, 0,
	qdev_get_gpio_in(armv7m, MSF2_EMAC_IRQ));

	/* Below devices are not modelled yet. */
	create_unimplemented_device("i2c_0", 0x40002000, 0x1000);
	create_unimplemented_device("dma", 0x40003000, 0x1000);
	create_unimplemented_device("watchdog", 0x40005000, 0x1000);
	create_unimplemented_device("i2c_1", 0x40012000, 0x1000);
	create_unimplemented_device("gpio", 0x40013000, 0x1000);
	create_unimplemented_device("hs-dma", 0x40014000, 0x1000);
	create_unimplemented_device("can", 0x40015000, 0x1000);
	create_unimplemented_device("rtc", 0x40017000, 0x1000);
	create_unimplemented_device("apb_config", 0x40020000, 0x10000);
	create_unimplemented_device("usb", 0x40043000, 0x1000);
	}

	static Property m2sxxx_soc_properties[] = {
	/*
	* part name specifies the type of SmartFusion2 device variant(this
	* property is for information purpose only.
	*/
	DEFINE_PROP_STRING("part-name", MSF2State, part_name),
	DEFINE_PROP_UINT64("eNVM-size", MSF2State, envm_size, MSF2_ENVM_MAX_SIZE),
	DEFINE_PROP_UINT64("eSRAM-size", MSF2State, esram_size,
	MSF2_ESRAM_MAX_SIZE),
	/* default divisors in Libero GUI */
	DEFINE_PROP_UINT8("apb0div", MSF2State, apb0div, 2),
	DEFINE_PROP_UINT8("apb1div", MSF2State, apb1div, 2),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void m2sxxx_soc_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->realize = m2sxxx_soc_realize;
	device_class_set_props(dc, m2sxxx_soc_properties);
	}

	static const TypeInfo m2sxxx_soc_info = {
	.name = TYPE_MSF2_SOC,
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(MSF2State),
	.instance_init = m2sxxx_soc_initfn,
	.class_init = m2sxxx_soc_class_init,
	};

	static void m2sxxx_soc_types(void)
	{
	type_register_static(&m2sxxx_soc_info);
	}

	type_init(m2sxxx_soc_types)