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hw/arm/virt: add dynamic sysbus device support 

Allows sysbus devices to be instantiated from command line by
using -device option. Machvirt creates a platform bus at init.
The dynamic sysbus devices are attached to this platform bus device.

The platform bus device registers a machine init done notifier
whose role will be to bind the dynamic sysbus devices. Indeed
dynamic sysbus devices are created after machine init.

machvirt also registers a notifier that will build the device
tree nodes for the platform bus and its children dynamic sysbus
devices.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1433244554-12898-4-git-send-email-eric.auger@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2015-06-02 12:29:13 +01:00 committed by Peter Maydell
parent ac9d32e396
commit 5f7a5a0edc
2 changed files with 60 additions and 1 deletions
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60
hw/arm/virt.c
View File

@ -45,9 +45,11 @@
#include "qemu/error-report.h"
#include "hw/pci-host/gpex.h"
#include "hw/arm/virt-acpi-build.h"
#include "hw/arm/sysbus-fdt.h"
#include "hw/platform-bus.h"
/* Number of external interrupt lines to configure the GIC with */
#define NUM_IRQS 128
#define NUM_IRQS 256
#define GIC_FDT_IRQ_TYPE_SPI 0
#define GIC_FDT_IRQ_TYPE_PPI 1
@ -60,6 +62,10 @@
#define GIC_FDT_IRQ_PPI_CPU_START 8
#define GIC_FDT_IRQ_PPI_CPU_WIDTH 8
#define PLATFORM_BUS_NUM_IRQS 64
static ARMPlatformBusSystemParams platform_bus_params;
typedef struct VirtBoardInfo {
struct arm_boot_info bootinfo;
const char *cpu_model;
@ -116,6 +122,7 @@ static const MemMapEntry a15memmap[] = {
[VIRT_FW_CFG] = { 0x09020000, 0x0000000a },
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
[VIRT_PCIE_MMIO] = { 0x10000000, 0x2eff0000 },
[VIRT_PCIE_PIO] = { 0x3eff0000, 0x00010000 },
[VIRT_PCIE_ECAM] = { 0x3f000000, 0x01000000 },
@ -128,6 +135,7 @@ static const int a15irqmap[] = {
[VIRT_PCIE] = 3, /* ... to 6 */
[VIRT_MMIO] = 16, /* ...to 16 + NUM_VIRTIO_TRANSPORTS - 1 */
[VIRT_GIC_V2M] = 48, /* ...to 48 + NUM_GICV2M_SPIS - 1 */
[VIRT_PLATFORM_BUS] = 112, /* ...to 112 + PLATFORM_BUS_NUM_IRQS -1 */
};
static VirtBoardInfo machines[] = {
@ -728,6 +736,47 @@ static void create_pcie(const VirtBoardInfo *vbi, qemu_irq *pic)
g_free(nodename);
}
static void create_platform_bus(VirtBoardInfo *vbi, qemu_irq *pic)
{
DeviceState *dev;
SysBusDevice *s;
int i;
ARMPlatformBusFDTParams *fdt_params = g_new(ARMPlatformBusFDTParams, 1);
MemoryRegion *sysmem = get_system_memory();
platform_bus_params.platform_bus_base = vbi->memmap[VIRT_PLATFORM_BUS].base;
platform_bus_params.platform_bus_size = vbi->memmap[VIRT_PLATFORM_BUS].size;
platform_bus_params.platform_bus_first_irq = vbi->irqmap[VIRT_PLATFORM_BUS];
platform_bus_params.platform_bus_num_irqs = PLATFORM_BUS_NUM_IRQS;
fdt_params->system_params = &platform_bus_params;
fdt_params->binfo = &vbi->bootinfo;
fdt_params->intc = "/intc";
/*
* register a machine init done notifier that creates the device tree
* nodes of the platform bus and its children dynamic sysbus devices
*/
arm_register_platform_bus_fdt_creator(fdt_params);
dev = qdev_create(NULL, TYPE_PLATFORM_BUS_DEVICE);
dev->id = TYPE_PLATFORM_BUS_DEVICE;
qdev_prop_set_uint32(dev, "num_irqs",
platform_bus_params.platform_bus_num_irqs);
qdev_prop_set_uint32(dev, "mmio_size",
platform_bus_params.platform_bus_size);
qdev_init_nofail(dev);
s = SYS_BUS_DEVICE(dev);
for (i = 0; i < platform_bus_params.platform_bus_num_irqs; i++) {
int irqn = platform_bus_params.platform_bus_first_irq + i;
sysbus_connect_irq(s, i, pic[irqn]);
}
memory_region_add_subregion(sysmem,
platform_bus_params.platform_bus_base,
sysbus_mmio_get_region(s, 0));
}
static void *machvirt_dtb(const struct arm_boot_info *binfo, int *fdt_size)
{
const VirtBoardInfo *board = (const VirtBoardInfo *)binfo;
@ -865,6 +914,14 @@ static void machvirt_init(MachineState *machine)
vbi->bootinfo.get_dtb = machvirt_dtb;
vbi->bootinfo.firmware_loaded = bios_name || drive_get(IF_PFLASH, 0, 0);
arm_load_kernel(ARM_CPU(first_cpu), &vbi->bootinfo);
/*
* arm_load_kernel machine init done notifier registration must
* happen before the platform_bus_create call. In this latter,
* another notifier is registered which adds platform bus nodes.
* Notifiers are executed in registration reverse order.
*/
create_platform_bus(vbi, pic);
}
static bool virt_get_secure(Object *obj, Error **errp)
@ -903,6 +960,7 @@ static void virt_class_init(ObjectClass *oc, void *data)
mc->desc = "ARM Virtual Machine",
mc->init = machvirt_init;
mc->max_cpus = 8;
mc->has_dynamic_sysbus = true;
}
static const TypeInfo machvirt_info = {

1
include/hw/arm/virt.h
View File

@ -55,6 +55,7 @@ enum {
VIRT_PCIE_PIO,
VIRT_PCIE_ECAM,
VIRT_GIC_V2M,
VIRT_PLATFORM_BUS,
};
typedef struct MemMapEntry {