46c305ef6b
Add a sysbus_mmio_get_region() which allows users of sysbus devices to turn a (SysBusDevice*, mmioidx) tuple into a MemoryRegion*. This enables some useful simplifications of devices which pass through another device's mmio region (either directly or by implementing some kind of memory controller device). Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
#ifndef HW_SYSBUS_H
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#define HW_SYSBUS_H 1
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/* Devices attached directly to the main system bus. */
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#include "qdev.h"
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#include "memory.h"
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#define QDEV_MAX_MMIO 32
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#define QDEV_MAX_PIO 32
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#define QDEV_MAX_IRQ 256
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typedef struct SysBusDevice SysBusDevice;
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typedef void (*mmio_mapfunc)(SysBusDevice *dev, target_phys_addr_t addr);
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struct SysBusDevice {
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DeviceState qdev;
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int num_irq;
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qemu_irq irqs[QDEV_MAX_IRQ];
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qemu_irq *irqp[QDEV_MAX_IRQ];
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int num_mmio;
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struct {
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target_phys_addr_t addr;
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target_phys_addr_t size;
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mmio_mapfunc cb;
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mmio_mapfunc unmap;
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ram_addr_t iofunc;
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MemoryRegion *memory;
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} mmio[QDEV_MAX_MMIO];
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int num_pio;
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pio_addr_t pio[QDEV_MAX_PIO];
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};
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typedef int (*sysbus_initfn)(SysBusDevice *dev);
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/* Macros to compensate for lack of type inheritance in C. */
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#define sysbus_from_qdev(dev) ((SysBusDevice *)(dev))
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#define FROM_SYSBUS(type, dev) DO_UPCAST(type, busdev, dev)
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typedef struct {
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DeviceInfo qdev;
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sysbus_initfn init;
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} SysBusDeviceInfo;
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void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init);
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void sysbus_register_withprop(SysBusDeviceInfo *info);
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void *sysbus_new(void);
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void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size,
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ram_addr_t iofunc);
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void sysbus_init_mmio_cb2(SysBusDevice *dev,
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mmio_mapfunc cb, mmio_mapfunc unmap);
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void sysbus_init_mmio_region(SysBusDevice *dev, MemoryRegion *memory);
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MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
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void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
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void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
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void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size);
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void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
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void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr);
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/* Legacy helper function for creating devices. */
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DeviceState *sysbus_create_varargs(const char *name,
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target_phys_addr_t addr, ...);
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DeviceState *sysbus_try_create_varargs(const char *name,
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target_phys_addr_t addr, ...);
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static inline DeviceState *sysbus_create_simple(const char *name,
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target_phys_addr_t addr,
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qemu_irq irq)
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{
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return sysbus_create_varargs(name, addr, irq, NULL);
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}
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static inline DeviceState *sysbus_try_create_simple(const char *name,
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target_phys_addr_t addr,
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qemu_irq irq)
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{
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return sysbus_try_create_varargs(name, addr, irq, NULL);
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}
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#endif /* !HW_SYSBUS_H */
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