qemu/hw/arm/nrf51_soc.c
Joel Stanley 673b2d42a8 arm: Add Nordic Semiconductor nRF51 SoC
The nRF51 is a Cortex-M0 microcontroller with an on-board radio module,
plus other common ARM SoC peripherals.

 http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.pdf

This defines a basic model of the CPU and memory, with no peripherals
implemented at this stage.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Message-id: 20180831220920.27113-3-joel@jms.id.au
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: wrapped a few long lines]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 14:14:07 +01:00

134 lines
3.8 KiB
C

/*
* Nordic Semiconductor nRF51 SoC
* http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.1.pdf
*
* Copyright 2018 Joel Stanley <joel@jms.id.au>
*
* This code is licensed under the GPL version 2 or later. See
* the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "hw/arm/arm.h"
#include "hw/sysbus.h"
#include "hw/boards.h"
#include "hw/devices.h"
#include "hw/misc/unimp.h"
#include "exec/address-spaces.h"
#include "sysemu/sysemu.h"
#include "qemu/log.h"
#include "cpu.h"
#include "hw/arm/nrf51_soc.h"
#define IOMEM_BASE 0x40000000
#define IOMEM_SIZE 0x20000000
#define FICR_BASE 0x10000000
#define FICR_SIZE 0x000000fc
#define FLASH_BASE 0x00000000
#define SRAM_BASE 0x20000000
#define PRIVATE_BASE 0xF0000000
#define PRIVATE_SIZE 0x10000000
/*
* The size and base is for the NRF51822 part. If other parts
* are supported in the future, add a sub-class of NRF51SoC for
* the specific variants
*/
#define NRF51822_FLASH_SIZE (256 * 1024)
#define NRF51822_SRAM_SIZE (16 * 1024)
static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
{
NRF51State *s = NRF51_SOC(dev_soc);
Error *err = NULL;
if (!s->board_memory) {
error_setg(errp, "memory property was not set");
return;
}
object_property_set_link(OBJECT(&s->cpu), OBJECT(&s->container), "memory",
&err);
if (err) {
error_propagate(errp, err);
return;
}
object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion_overlap(&s->container, 0, s->board_memory, -1);
memory_region_init_rom(&s->flash, OBJECT(s), "nrf51.flash", s->flash_size,
&err);
if (err) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, FLASH_BASE, &s->flash);
memory_region_init_ram(&s->sram, NULL, "nrf51.sram", s->sram_size, &err);
if (err) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, SRAM_BASE, &s->sram);
create_unimplemented_device("nrf51_soc.io", IOMEM_BASE, IOMEM_SIZE);
create_unimplemented_device("nrf51_soc.ficr", FICR_BASE, FICR_SIZE);
create_unimplemented_device("nrf51_soc.private",
PRIVATE_BASE, PRIVATE_SIZE);
}
static void nrf51_soc_init(Object *obj)
{
NRF51State *s = NRF51_SOC(obj);
memory_region_init(&s->container, obj, "nrf51-container", UINT64_MAX);
sysbus_init_child_obj(OBJECT(s), "armv6m", OBJECT(&s->cpu), sizeof(s->cpu),
TYPE_ARMV7M);
qdev_prop_set_string(DEVICE(&s->cpu), "cpu-type",
ARM_CPU_TYPE_NAME("cortex-m0"));
qdev_prop_set_uint32(DEVICE(&s->cpu), "num-irq", 32);
}
static Property nrf51_soc_properties[] = {
DEFINE_PROP_LINK("memory", NRF51State, board_memory, TYPE_MEMORY_REGION,
MemoryRegion *),
DEFINE_PROP_UINT32("sram-size", NRF51State, sram_size, NRF51822_SRAM_SIZE),
DEFINE_PROP_UINT32("flash-size", NRF51State, flash_size,
NRF51822_FLASH_SIZE),
DEFINE_PROP_END_OF_LIST(),
};
static void nrf51_soc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = nrf51_soc_realize;
dc->props = nrf51_soc_properties;
}
static const TypeInfo nrf51_soc_info = {
.name = TYPE_NRF51_SOC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(NRF51State),
.instance_init = nrf51_soc_init,
.class_init = nrf51_soc_class_init,
};
static void nrf51_soc_types(void)
{
type_register_static(&nrf51_soc_info);
}
type_init(nrf51_soc_types)