[PATCH 03/13] microvm: add isa-acpi device

[Gerd Hoffmann <kraxel@redhat.com>]

Minimal ACPI device for PCI-less machines like microvm.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/acpi/isa-acpi.c    | 114 ++++++++++++++++++++++++++++++++++++++++++
 hw/acpi/Makefile.objs |   1 +
 2 files changed, 115 insertions(+)
 create mode 100644 hw/acpi/isa-acpi.c

diff --git a/hw/acpi/isa-acpi.c b/hw/acpi/isa-acpi.c
new file mode 100644
index 000000000000..5d7d770a5c0b
--- /dev/null
+++ b/hw/acpi/isa-acpi.c
@@ -0,0 +1,114 @@
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+#include "hw/acpi/acpi.h"
+#include "sysemu/runstate.h"
+
+typedef struct ISAACPI {
+    ISADevice base;
+
+    uint32_t io_base;
+    uint16_t sci_irq;
+    uint32_t gpe_base;
+    uint32_t gpe_len;
+
+    qemu_irq irq;
+    MemoryRegion io;
+    ACPIREGS acpi;
+    Notifier powerdown_req;
+} ISAACPI;
+
+#define TYPE_ISA_ACPI "isa-acpi"
+#define ISA_ACPI(obj) \
+    OBJECT_CHECK(ISAACPI, (obj), TYPE_ISA_ACPI)
+
+static void isa_acpi_timer(ACPIREGS *acpi)
+{
+    ISAACPI *s = container_of(acpi, ISAACPI, acpi);
+    acpi_update_sci(&s->acpi, s->irq);
+}
+
+static void isa_acpi_init(Object *obj)
+{
+    ISAACPI *s = ISA_ACPI(obj);
+
+    s->io_base = 0x600;
+    s->sci_irq = 9;
+    s->gpe_base = 0x680;
+    s->gpe_len = 4;
+}
+
+static void isa_acpi_powerdown_req(Notifier *n, void *opaque)
+{
+    ISAACPI *s = container_of(n, ISAACPI, powerdown_req);
+
+    acpi_pm1_evt_power_down(&s->acpi);
+}
+
+static void isa_acpi_add_propeties(ISAACPI *s)
+{
+    static const uint8_t zero;
+
+    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
+                                  &zero, NULL);
+    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
+                                  &zero, NULL);
+    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
+                                   &s->gpe_base, NULL);
+    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
+                                   &s->gpe_len, NULL);
+    object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
+                                   &s->sci_irq, NULL);
+    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
+                                   &s->io_base, NULL);
+}
+
+static void isa_acpi_realize(DeviceState *dev, Error **errp)
+{
+    ISADevice *isa = ISA_DEVICE(dev);
+    ISAACPI *s = ISA_ACPI(dev);
+
+    memory_region_init(&s->io, OBJECT(s), "isa-acpi", 64);
+    memory_region_set_enabled(&s->io, true);
+    isa_register_ioport(isa, &s->io, s->io_base);
+    isa_init_irq(isa, &s->irq, s->sci_irq);
+
+    acpi_pm_tmr_init(&s->acpi, isa_acpi_timer, &s->io);
+    acpi_pm1_evt_init(&s->acpi, isa_acpi_timer, &s->io);
+    acpi_pm1_cnt_init(&s->acpi, &s->io, true, true, 0);
+    acpi_gpe_init(&s->acpi, 4);
+
+    s->powerdown_req.notify = isa_acpi_powerdown_req;
+    qemu_register_powerdown_notifier(&s->powerdown_req);
+
+    isa_acpi_add_propeties(s);
+}
+
+static void isa_acpi_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
+
+    dc->realize = isa_acpi_realize;
+    dc->user_creatable = false;
+    dc->hotpluggable = false;
+    adevc->madt_cpu = pc_madt_cpu_entry;
+}
+
+static const TypeInfo isa_acpi_info = {
+    .name          = TYPE_ISA_ACPI,
+    .parent        = TYPE_ISA_DEVICE,
+    .instance_size = sizeof(ISAACPI),
+    .instance_init = isa_acpi_init,
+    .class_init    = isa_acpi_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_ACPI_DEVICE_IF },
+        { }
+    }
+};
+
+static void register_types(void)
+{
+    type_register_static(&isa_acpi_info);
+}
+
+type_init(register_types)
diff --git a/hw/acpi/Makefile.objs b/hw/acpi/Makefile.objs
index 777da07f4d70..aae53c73ebbd 100644
--- a/hw/acpi/Makefile.objs
+++ b/hw/acpi/Makefile.objs
@@ -14,6 +14,7 @@ common-obj-$(call lnot,$(CONFIG_PC)) += acpi-x86-stub.o
 common-obj-y += acpi_interface.o
 common-obj-y += bios-linker-loader.o
 common-obj-y += aml-build.o utils.o
+common-obj-$(CONFIG_PC) += isa-acpi.o
 common-obj-$(CONFIG_ACPI_PCI) += pci.o
 common-obj-$(CONFIG_TPM) += tpm.o
 
-- 
2.18.2