From: Ruslan Ruslichenko <[email protected]> Add TYPE_FDT_GENERIC_INTC class and interface to allow interrupt controllers to register callback which can be used to get IRQ's from this controller.
Optionally, interrupt controllers may also provide auto_parent() callabck which can be used to attach it to corresponding CPU's or other interrupt parent. Signed-off-by: Ruslan Ruslichenko <[email protected]> --- hw/core/fdt_generic_util.c | 7 ++++ include/hw/core/fdt_generic_util.h | 59 ++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) diff --git a/hw/core/fdt_generic_util.c b/hw/core/fdt_generic_util.c index c0e974e53a..b22c612e0f 100644 --- a/hw/core/fdt_generic_util.c +++ b/hw/core/fdt_generic_util.c @@ -766,6 +766,12 @@ static int fdt_init_qdev(char *node_path, FDTMachineInfo *fdti, char *compat) return 0; } +static const TypeInfo fdt_generic_intc_info = { + .name = TYPE_FDT_GENERIC_INTC, + .parent = TYPE_INTERFACE, + .class_size = sizeof(FDTGenericIntcClass), +}; + static const TypeInfo fdt_generic_mmap_info = { .name = TYPE_FDT_GENERIC_MMAP, .parent = TYPE_INTERFACE, @@ -774,6 +780,7 @@ static const TypeInfo fdt_generic_mmap_info = { static void fdt_generic_register_types(void) { + type_register_static(&fdt_generic_intc_info); type_register_static(&fdt_generic_mmap_info); } type_init(fdt_generic_register_types) diff --git a/include/hw/core/fdt_generic_util.h b/include/hw/core/fdt_generic_util.h index 38086ec1e4..c5aaa58dd6 100644 --- a/include/hw/core/fdt_generic_util.h +++ b/include/hw/core/fdt_generic_util.h @@ -16,6 +16,65 @@ FDTMachineInfo *fdt_generic_create_machine(void *fdt, qemu_irq *cpu_irq); +#define TYPE_FDT_GENERIC_INTC "fdt-generic-intc" + +#define FDT_GENERIC_INTC_CLASS(klass) \ + OBJECT_CLASS_CHECK(FDTGenericIntcClass, (klass), TYPE_FDT_GENERIC_INTC) +#define FDT_GENERIC_INTC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(FDTGenericIntcClass, (obj), TYPE_FDT_GENERIC_INTC) +#define FDT_GENERIC_INTC(obj) \ + INTERFACE_CHECK(FDTGenericIntc, (obj), TYPE_FDT_GENERIC_INTC) + +typedef struct FDTGenericIntc { + /*< private >*/ + Object parent_obj; +} FDTGenericIntc; + +typedef struct FDTGenericIntcClass { + /*< private >*/ + InterfaceClass parent_class; + + /*< public >*/ + /** + * get irq - Based on the FDT generic interrupt binding for this device + * grab the irq(s) for the given interrupt cells description. In some device + * tree bindings (E.G. ARM GIC with its PPI) a single interrupt cell-tuple + * can describe more than one connection. So populates an array with all + * relevant IRQs. + * + * @obj - interrupt controller to get irqs input for ("interrupt-parent") + * @irqs - array to populate with irqs (must be >= @max length + * @cells - interrupt cells values. Must be >= ncells length + * @ncells - number of cells in @cells + * @max - maximum number of irqs to return + * @errp - Error condition + * + * @returns the number of interrupts populated in irqs. Undefined on error + * (use errp for error checking). If it is valid for the interrupt + * controller binding to specify no (or a disabled) connections it may + * return 0 as a non-error. + */ + + int (*get_irq)(FDTGenericIntc *obj, qemu_irq *irqs, uint32_t *cells, + int ncells, int max, Error **errp); + + /** + * auto_parent. An interrupt controller often infers its own interrupt + * parent (usually a CPU or CPU cluster. This function allows an interrupt + * controller to implement its own auto-connections. Is called if an + * interrupt controller itself (detected via "interrupt-controller") has no + * "interrupt-parent" node. + * + * @obj - Interrupt controller top attempt autoconnection + * @errp - Error condition + * + * FIXME: More arguments need to be added for partial descriptions + */ + + void (*auto_parent)(FDTGenericIntc *obj, Error **errp); + +} FDTGenericIntcClass; + #define TYPE_FDT_GENERIC_MMAP "fdt-generic-mmap" #define FDT_GENERIC_MMAP_CLASS(klass) \ -- 2.43.0
