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Iglesias" , Ruslan_Ruslichenko@epam.com, balaton@eik.bme.hu Subject: [PATCH v3 14/33] hw/core/fdt_generic_util: add TYPE_FDT_GENERIC_INTC Date: Thu, 2 Apr 2026 23:55:59 +0200 Message-ID: <20260402215629.745866-15-ruslichenko.r@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260402215629.745866-1-ruslichenko.r@gmail.com> References: <20260402215629.745866-1-ruslichenko.r@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::633; envelope-from=ruslichenko.r@gmail.com; helo=mail-ej1-x633.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1775167320572154100 Content-Type: text/plain; charset="utf-8" From: Ruslan Ruslichenko 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 --- 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 8f91bcb66c..d816e395fd 100644 --- a/hw/core/fdt_generic_util.c +++ b/hw/core/fdt_generic_util.c @@ -617,6 +617,12 @@ static int fdt_init_qdev(char *node_path, FDTMachineIn= fo *fdti, char *compat) return 0; } =20 +static const TypeInfo fdt_generic_intc_info =3D { + .name =3D TYPE_FDT_GENERIC_INTC, + .parent =3D TYPE_INTERFACE, + .class_size =3D sizeof(FDTGenericIntcClass), +}; + static const TypeInfo fdt_generic_mmap_info =3D { .name =3D TYPE_FDT_GENERIC_MMAP, .parent =3D TYPE_INTERFACE, @@ -625,6 +631,7 @@ static const TypeInfo fdt_generic_mmap_info =3D { =20 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_gener= ic_util.h index e3671990ad..c92c79dd12 100644 --- a/include/hw/core/fdt_generic_util.h +++ b/include/hw/core/fdt_generic_util.h @@ -16,6 +16,65 @@ =20 FDTMachineInfo *fdt_generic_create_machine(void *fdt, qemu_irq *cpu_irq); =20 +#define TYPE_FDT_GENERIC_INTC "fdt-generic-intc" + +#define FDT_GENERIC_INTC_CLASS(klass) \ + OBJECT_CLASS_CHECK(FDTGenericIntcClass, (klass), TYPE_FDT_GENERIC_INT= C) +#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-t= uple + * can describe more than one connection. So populates an array with a= ll + * relevant IRQs. + * + * @obj - interrupt controller to get irqs input for ("interrupt-paren= t") + * @irqs - array to populate with irqs (must be >=3D @max length + * @cells - interrupt cells values. Must be >=3D 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 e= rror + * (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 inter= rupt + * controller to implement its own auto-connections. Is called if an + * interrupt controller itself (detected via "interrupt-controller") h= as 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" =20 #define FDT_GENERIC_MMAP_CLASS(klass) \ --=20 2.43.0