Hi Mark,
On Mon, Jan 15, 2018 at 9:58 PM, Mark Cave-Ayland
<mark.cave-ayl...@ilande.co.uk> wrote:
> This inbuilt device contains a single 4-byte register, of which bit 24 is used
> to power down the machine on a real Ultra 5.
>
> The power device exists at offset 0x724000 on a real machine, but due to the
> current configuration of the BARs in QEMU it must be located lower in PCI IO
> space.
>
> For the moment we place the power device at offset 0x7240 as a reminder of its
> original location and raise the base PCI IO address from 0x4000 to 0x8000.
I think it's ok to have it there for now. The guests should get the
info from the device tree.
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
Reviewed-by: Artyom Tarasenko <atar4q...@gmail.com>
> ---
> hw/sparc64/sun4u.c | 64
> +++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 63 insertions(+), 1 deletion(-)
>
> diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
> index ec45ec2801..26ab6e9a9c 100644
> --- a/hw/sparc64/sun4u.c
> +++ b/hw/sparc64/sun4u.c
> @@ -205,6 +205,59 @@ typedef struct ResetData {
> uint64_t prom_addr;
> } ResetData;
>
> +#define TYPE_SUN4U_POWER "power"
> +#define SUN4U_POWER(obj) OBJECT_CHECK(PowerDevice, (obj), TYPE_SUN4U_POWER)
> +
> +typedef struct PowerDevice {
> + SysBusDevice parent_obj;
> +
> + MemoryRegion power_mmio;
> +} PowerDevice;
> +
> +/* Power */
> +static void power_mem_write(void *opaque, hwaddr addr,
> + uint64_t val, unsigned size)
> +{
> + /* According to a real Ultra 5, bit 24 controls the power */
> + if (val & 0x1000000) {
> + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
> + }
> +}
> +
> +static const MemoryRegionOps power_mem_ops = {
> + .write = power_mem_write,
> + .endianness = DEVICE_NATIVE_ENDIAN,
> + .valid = {
> + .min_access_size = 4,
> + .max_access_size = 4,
> + },
> +};
> +
> +static void power_realize(DeviceState *dev, Error **errp)
> +{
> + PowerDevice *d = SUN4U_POWER(dev);
> + SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
> +
> + memory_region_init_io(&d->power_mmio, OBJECT(dev), &power_mem_ops, d,
> + "power", sizeof(uint32_t));
> +
> + sysbus_init_mmio(sbd, &d->power_mmio);
> +}
> +
> +static void power_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> +
> + dc->realize = power_realize;
> +}
> +
> +static const TypeInfo power_info = {
> + .name = TYPE_SUN4U_POWER,
> + .parent = TYPE_SYS_BUS_DEVICE,
> + .instance_size = sizeof(PowerDevice),
> + .class_init = power_class_init,
> +};
> +
> static void ebus_isa_irq_handler(void *opaque, int n, int level)
> {
> EbusState *s = EBUS(opaque);
> @@ -221,6 +274,7 @@ static void ebus_isa_irq_handler(void *opaque, int n, int
> level)
> static void ebus_realize(PCIDevice *pci_dev, Error **errp)
> {
> EbusState *s = EBUS(pci_dev);
> + SysBusDevice *sbd;
> DeviceState *dev;
> qemu_irq *isa_irq;
> DriveInfo *fd[MAX_FD];
> @@ -270,6 +324,13 @@ static void ebus_realize(PCIDevice *pci_dev, Error
> **errp)
> qdev_prop_set_uint32(dev, "dma", -1);
> qdev_init_nofail(dev);
>
> + /* Power */
> + dev = qdev_create(NULL, TYPE_SUN4U_POWER);
> + qdev_init_nofail(dev);
> + sbd = SYS_BUS_DEVICE(dev);
> + memory_region_add_subregion(pci_address_space_io(pci_dev), 0x7240,
> + sysbus_mmio_get_region(sbd, 0));
> +
> /* PCI */
> pci_dev->config[0x04] = 0x06; // command = bus master, pci mem
> pci_dev->config[0x05] = 0x00;
> @@ -282,7 +343,7 @@ static void ebus_realize(PCIDevice *pci_dev, Error **errp)
> 0, 0x1000000);
> pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar0);
> memory_region_init_alias(&s->bar1, OBJECT(s), "bar1", get_system_io(),
> - 0, 0x4000);
> + 0, 0x8000);
> pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->bar1);
> }
>
> @@ -693,6 +754,7 @@ static const TypeInfo sun4v_type = {
>
> static void sun4u_register_types(void)
> {
> + type_register_static(&power_info);
> type_register_static(&ebus_info);
> type_register_static(&prom_info);
> type_register_static(&ram_info);
> --
> 2.11.0
>
--
Regards,
Artyom Tarasenko
SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu
