d10e54329b
We can have at most one ISA bus. If you try to create another one, isa_bus_new() complains to stderr and returns null. isa_bus_new() is called in two contexts, machine's init() and device's realize() methods. Since complaining to stderr is not proper in the latter context, convert isa_bus_new() to Error. Machine's init(): * mips_jazz_init(), called from the init() methods of machines "magnum" and "pica" * mips_r4k_init(), the init() method of machine "mips" * pc_init1() called from the init() methods of non-q35 PC machines * typhoon_init(), called from clipper_init(), the init() method of machine "clipper" These callers always create the first ISA bus, hence isa_bus_new() can't fail. Simply pass &error_abort. Device's realize(): * i82378_realize(), of PCI device "i82378" * ich9_lpc_realize(), of PCI device "ICH9-LPC" * pci_ebus_realize(), of PCI device "ebus" * piix3_realize(), of PCI device "pci-piix3", abstract parent of "PIIX3" and "PIIX3-xen" * piix4_realize(), of PCI device "PIIX4" * vt82c686b_realize(), of PCI device "VT82C686B" Propagate the error. Note that these devices are typically created only by machine init() methods with qdev_init_nofail() or similar. If we screwed up and created an ISA bus before that call, we now give up right away. Before, we'd hobble on, and typically die in isa_bus_irqs(). Similar if someone finds a way to hot-plug one of these critters. Cc: Richard Henderson <rth@twiddle.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: "Hervé Poussineau" <hpoussin@reactos.org> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Markus Armbruster <armbru@pond.sub.org> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <1450370121-5768-11-git-send-email-armbru@redhat.com>
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
#ifndef HW_ISA_H
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#define HW_ISA_H
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/* ISA bus */
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#include "exec/ioport.h"
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#include "exec/memory.h"
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#include "hw/qdev.h"
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#define ISA_NUM_IRQS 16
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#define TYPE_ISA_DEVICE "isa-device"
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#define ISA_DEVICE(obj) \
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OBJECT_CHECK(ISADevice, (obj), TYPE_ISA_DEVICE)
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#define ISA_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(ISADeviceClass, (klass), TYPE_ISA_DEVICE)
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#define ISA_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(ISADeviceClass, (obj), TYPE_ISA_DEVICE)
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#define TYPE_ISA_BUS "ISA"
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#define ISA_BUS(obj) OBJECT_CHECK(ISABus, (obj), TYPE_ISA_BUS)
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#define TYPE_APPLE_SMC "isa-applesmc"
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#define APPLESMC_MAX_DATA_LENGTH 32
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#define APPLESMC_PROP_IO_BASE "iobase"
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static inline uint16_t applesmc_port(void)
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{
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Object *obj = object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
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if (obj) {
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return object_property_get_int(obj, APPLESMC_PROP_IO_BASE, NULL);
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}
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return 0;
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}
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typedef struct ISADeviceClass {
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DeviceClass parent_class;
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} ISADeviceClass;
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struct ISABus {
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/*< private >*/
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BusState parent_obj;
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/*< public >*/
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MemoryRegion *address_space;
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MemoryRegion *address_space_io;
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qemu_irq *irqs;
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};
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struct ISADevice {
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/*< private >*/
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DeviceState parent_obj;
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/*< public >*/
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uint32_t isairq[2];
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int nirqs;
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int ioport_id;
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};
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ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
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MemoryRegion *address_space_io, Error **errp);
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void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
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qemu_irq isa_get_irq(ISADevice *dev, int isairq);
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void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
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MemoryRegion *isa_address_space(ISADevice *dev);
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MemoryRegion *isa_address_space_io(ISADevice *dev);
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ISADevice *isa_create(ISABus *bus, const char *name);
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ISADevice *isa_try_create(ISABus *bus, const char *name);
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ISADevice *isa_create_simple(ISABus *bus, const char *name);
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ISADevice *isa_vga_init(ISABus *bus);
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/**
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* isa_register_ioport: Install an I/O port region on the ISA bus.
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*
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* Register an I/O port region via memory_region_add_subregion
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* inside the ISA I/O address space.
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*
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* @dev: the ISADevice against which these are registered; may be NULL.
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* @io: the #MemoryRegion being registered.
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* @start: the base I/O port.
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*/
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void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
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/**
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* isa_register_portio_list: Initialize a set of ISA io ports
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*
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* Several ISA devices have many dis-joint I/O ports. Worse, these I/O
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* ports can be interleaved with I/O ports from other devices. This
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* function makes it easy to create multiple MemoryRegions for a single
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* device and use the legacy portio routines.
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*
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* @dev: the ISADevice against which these are registered; may be NULL.
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* @start: the base I/O port against which the portio->offset is applied.
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* @portio: the ports, sorted by offset.
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* @opaque: passed into the portio callbacks.
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* @name: passed into memory_region_init_io.
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*/
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void isa_register_portio_list(ISADevice *dev, uint16_t start,
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const MemoryRegionPortio *portio,
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void *opaque, const char *name);
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static inline ISABus *isa_bus_from_device(ISADevice *d)
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{
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return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
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}
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/* dma.c */
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int DMA_get_channel_mode (int nchan);
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int DMA_read_memory (int nchan, void *buf, int pos, int size);
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int DMA_write_memory (int nchan, void *buf, int pos, int size);
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void DMA_hold_DREQ (int nchan);
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void DMA_release_DREQ (int nchan);
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void DMA_schedule(void);
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void DMA_init(int high_page_enable);
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void DMA_register_channel (int nchan,
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DMA_transfer_handler transfer_handler,
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void *opaque);
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#endif
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