From d3e07dc83e98127a130a29878c7c652d05eaaf18 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Fri, 13 Dec 2019 11:51:00 +0100 Subject: [PATCH] hw/i386/pc: Extract the port92 device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This device is only used by the PC machines. The pc.c file is already big enough, with 2255 lines. By removing 113 lines of it, we reduced it by 5%. It is now a bit easier to navigate the file. Signed-off-by: Philippe Mathieu-Daudé Signed-off-by: Paolo Bonzini --- hw/i386/Makefile.objs | 1 + hw/i386/pc.c | 113 ------------------------------------- hw/i386/port92.c | 126 ++++++++++++++++++++++++++++++++++++++++++ hw/i386/trace-events | 2 +- include/hw/i386/pc.h | 3 + 5 files changed, 131 insertions(+), 114 deletions(-) create mode 100644 hw/i386/port92.c diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index 1236c3b95c..8ce1b26533 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -13,6 +13,7 @@ obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o obj-$(CONFIG_XEN) += ../xenpv/ xen/ obj-$(CONFIG_VMPORT) += vmport.o obj-$(CONFIG_VMMOUSE) += vmmouse.o +obj-$(CONFIG_PC) += port92.o obj-y += kvmvapic.o obj-$(CONFIG_PC) += acpi-build.o diff --git a/hw/i386/pc.c b/hw/i386/pc.c index e36053f2a7..42014b06de 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -673,119 +673,6 @@ void pc_cmos_init(PCMachineState *pcms, qemu_register_reset(pc_cmos_init_late, &arg); } -#define TYPE_PORT92 "port92" -#define PORT92(obj) OBJECT_CHECK(Port92State, (obj), TYPE_PORT92) - -/* port 92 stuff: could be split off */ -typedef struct Port92State { - ISADevice parent_obj; - - MemoryRegion io; - uint8_t outport; - qemu_irq a20_out; -} Port92State; - -static void port92_write(void *opaque, hwaddr addr, uint64_t val, - unsigned size) -{ - Port92State *s = opaque; - int oldval = s->outport; - - trace_port92_write(val); - s->outport = val; - qemu_set_irq(s->a20_out, (val >> 1) & 1); - if ((val & 1) && !(oldval & 1)) { - qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); - } -} - -static uint64_t port92_read(void *opaque, hwaddr addr, - unsigned size) -{ - Port92State *s = opaque; - uint32_t ret; - - ret = s->outport; - trace_port92_read(ret); - return ret; -} - -static const VMStateDescription vmstate_port92_isa = { - .name = "port92", - .version_id = 1, - .minimum_version_id = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT8(outport, Port92State), - VMSTATE_END_OF_LIST() - } -}; - -static void port92_reset(DeviceState *d) -{ - Port92State *s = PORT92(d); - - s->outport &= ~1; -} - -static const MemoryRegionOps port92_ops = { - .read = port92_read, - .write = port92_write, - .impl = { - .min_access_size = 1, - .max_access_size = 1, - }, - .endianness = DEVICE_LITTLE_ENDIAN, -}; - -static void port92_initfn(Object *obj) -{ - Port92State *s = PORT92(obj); - - memory_region_init_io(&s->io, OBJECT(s), &port92_ops, s, "port92", 1); - - s->outport = 0; - - qdev_init_gpio_out_named(DEVICE(obj), &s->a20_out, PORT92_A20_LINE, 1); -} - -static void port92_realizefn(DeviceState *dev, Error **errp) -{ - ISADevice *isadev = ISA_DEVICE(dev); - Port92State *s = PORT92(dev); - - isa_register_ioport(isadev, &s->io, 0x92); -} - -static void port92_class_initfn(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - - dc->realize = port92_realizefn; - dc->reset = port92_reset; - dc->vmsd = &vmstate_port92_isa; - /* - * Reason: unlike ordinary ISA devices, this one needs additional - * wiring: its A20 output line needs to be wired up with - * qdev_connect_gpio_out_named(). - */ - dc->user_creatable = false; -} - -static const TypeInfo port92_info = { - .name = TYPE_PORT92, - .parent = TYPE_ISA_DEVICE, - .instance_size = sizeof(Port92State), - .instance_init = port92_initfn, - .class_init = port92_class_initfn, -}; - -static void port92_register_types(void) -{ - type_register_static(&port92_info); -} - -type_init(port92_register_types) - static void handle_a20_line_change(void *opaque, int irq, int level) { X86CPU *cpu = opaque; diff --git a/hw/i386/port92.c b/hw/i386/port92.c new file mode 100644 index 0000000000..19866c44ef --- /dev/null +++ b/hw/i386/port92.c @@ -0,0 +1,126 @@ +/* + * QEMU I/O port 0x92 (System Control Port A, to handle Fast Gate A20) + * + * Copyright (c) 2003-2004 Fabrice Bellard + * + * SPDX-License-Identifier: MIT + */ + +#include "qemu/osdep.h" +#include "sysemu/runstate.h" +#include "migration/vmstate.h" +#include "hw/irq.h" +#include "hw/i386/pc.h" +#include "trace.h" + +#define PORT92(obj) OBJECT_CHECK(Port92State, (obj), TYPE_PORT92) + +typedef struct Port92State { + ISADevice parent_obj; + + MemoryRegion io; + uint8_t outport; + qemu_irq a20_out; +} Port92State; + +static void port92_write(void *opaque, hwaddr addr, uint64_t val, + unsigned size) +{ + Port92State *s = opaque; + int oldval = s->outport; + + trace_port92_write(val); + s->outport = val; + qemu_set_irq(s->a20_out, (val >> 1) & 1); + if ((val & 1) && !(oldval & 1)) { + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + } +} + +static uint64_t port92_read(void *opaque, hwaddr addr, + unsigned size) +{ + Port92State *s = opaque; + uint32_t ret; + + ret = s->outport; + trace_port92_read(ret); + + return ret; +} + +static const VMStateDescription vmstate_port92_isa = { + .name = "port92", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT8(outport, Port92State), + VMSTATE_END_OF_LIST() + } +}; + +static void port92_reset(DeviceState *d) +{ + Port92State *s = PORT92(d); + + s->outport &= ~1; +} + +static const MemoryRegionOps port92_ops = { + .read = port92_read, + .write = port92_write, + .impl = { + .min_access_size = 1, + .max_access_size = 1, + }, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void port92_initfn(Object *obj) +{ + Port92State *s = PORT92(obj); + + memory_region_init_io(&s->io, OBJECT(s), &port92_ops, s, "port92", 1); + + s->outport = 0; + + qdev_init_gpio_out_named(DEVICE(obj), &s->a20_out, PORT92_A20_LINE, 1); +} + +static void port92_realizefn(DeviceState *dev, Error **errp) +{ + ISADevice *isadev = ISA_DEVICE(dev); + Port92State *s = PORT92(dev); + + isa_register_ioport(isadev, &s->io, 0x92); +} + +static void port92_class_initfn(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = port92_realizefn; + dc->reset = port92_reset; + dc->vmsd = &vmstate_port92_isa; + /* + * Reason: unlike ordinary ISA devices, this one needs additional + * wiring: its A20 output line needs to be wired up with + * qdev_connect_gpio_out_named(). + */ + dc->user_creatable = false; +} + +static const TypeInfo port92_info = { + .name = TYPE_PORT92, + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(Port92State), + .instance_init = port92_initfn, + .class_init = port92_class_initfn, +}; + +static void port92_register_types(void) +{ + type_register_static(&port92_info); +} + +type_init(port92_register_types) diff --git a/hw/i386/trace-events b/hw/i386/trace-events index a9b6437050..e48bef2b0d 100644 --- a/hw/i386/trace-events +++ b/hw/i386/trace-events @@ -116,6 +116,6 @@ vmport_command(unsigned char command) "command: 0x%02x" x86_gsi_interrupt(int irqn, int level) "GSI interrupt #%d level:%d" x86_pic_interrupt(int irqn, int level) "PIC interrupt #%d level:%d" -# pc.c +# port92.c port92_read(uint8_t val) "port92: read 0x%02x" port92_write(uint8_t val) "port92: write 0x%02x" diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 58aaa231e3..d5ac76d54e 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -196,8 +196,11 @@ void pc_i8259_create(ISABus *isa_bus, qemu_irq *i8259_irqs); ISADevice *pc_find_fdc0(void); int cmos_get_fd_drive_type(FloppyDriveType fd0); +/* port92.c */ #define PORT92_A20_LINE "a20" +#define TYPE_PORT92 "port92" + /* pc_sysfw.c */ void pc_system_flash_create(PCMachineState *pcms); void pc_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory);