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Iglesias" , Ruslan_Ruslichenko@epam.com, balaton@eik.bme.hu Subject: [PATCH v2 15/33] hw/core/fdt_generic_util: map device memory Date: Thu, 19 Feb 2026 15:33:14 +0100 Message-ID: <20260219143332.3316679-16-ruslichenko.r@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260219143332.3316679-1-ruslichenko.r@gmail.com> References: <20260219143332.3316679-1-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::332; envelope-from=ruslichenko.r@gmail.com; helo=mail-wm1-x332.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=ham 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: 1771511841451158500 Content-Type: text/plain; charset="utf-8" From: Ruslan Ruslichenko Parse device mmio regions provided within 'reg' and 'reg-extened' device tree properties. Call corresponding device interface class handlers to create memory regions. Signed-off-by: Ruslan Ruslichenko --- hw/core/fdt_generic_util.c | 129 +++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) diff --git a/hw/core/fdt_generic_util.c b/hw/core/fdt_generic_util.c index dcacc5033b..838ed9a85c 100644 --- a/hw/core/fdt_generic_util.c +++ b/hw/core/fdt_generic_util.c @@ -630,6 +630,22 @@ static inline uint64_t get_int_be(const void *p, int l= en) } } =20 +/* FIXME: use structs instead of parallel arrays */ + +static const char *fdt_generic_reg_size_prop_names[] =3D { + "#address-cells", + "#size-cells", + "#bus-cells", + "#priority-cells", +}; + +static const int fdt_generic_reg_cells_defaults[] =3D { + 1, + 1, + 0, + 0, +}; + /* * Error handler for device creation failure. * @@ -831,6 +847,117 @@ static void fdt_init_qdev_array_prop(Object *obj, DB_PRINT_NP(0, "set property %s propname to \n", propname); } =20 +static void fdt_parse_node_reg_prop(FDTMachineInfo *fdti, char *node_path, + Object *dev) +{ + FDTGenericRegPropInfo reg =3D {0}; + Object *parent; + char parent_path[DT_PATH_LENGTH]; + int cell_idx =3D 0; + bool extended =3D true; + Error *errp =3D NULL; + int i; + + if (!object_dynamic_cast(dev, TYPE_SYS_BUS_DEVICE) && + !object_dynamic_cast(dev, TYPE_FDT_GENERIC_MMAP)) + return; + + qemu_fdt_getprop_cell(fdti->fdt, node_path, "reg-extended", 0, + &errp); + if (errp) { + error_free(errp); + errp =3D NULL; + extended =3D false; + qemu_devtree_getparent(fdti->fdt, parent_path, node_path); + } + + parent =3D fdt_init_get_opaque(fdti, parent_path); + + for (reg.n =3D 0;; reg.n++) { + char ph_parent[DT_PATH_LENGTH]; + const char *pnp =3D parent_path; + + reg.parents =3D g_renew(Object *, reg.parents, reg.n + 1); + reg.parents[reg.n] =3D parent; + + if (extended) { + int p_ph =3D qemu_fdt_getprop_cell(fdti->fdt, node_path, + "reg-extended", cell_idx++, + &errp); + if (errp) { + error_free(errp); + errp =3D NULL; + goto exit_reg_parse; + } + if (qemu_devtree_get_node_by_phandle(fdti->fdt, ph_parent, + p_ph)) { + goto exit_reg_parse; + } + + while (!fdt_init_has_opaque(fdti, ph_parent) && + qemu_in_coroutine()) { + fdt_init_yield(fdti); + } + + if (!fdt_init_has_opaque(fdti, ph_parent)) { + goto exit_reg_parse; + } + + reg.parents[reg.n] =3D fdt_init_get_opaque(fdti, ph_parent); + pnp =3D ph_parent; + } + + for (i =3D 0; i < FDT_GENERIC_REG_TUPLE_LENGTH; ++i) { + const char *size_prop_name =3D fdt_generic_reg_size_prop_names= [i]; + int nc =3D qemu_fdt_getprop_cell_inherited(fdti->fdt, node_pat= h, + size_prop_name, 0, &errp); + uint64_t val =3D 0; + + if (errp) { + int size_default =3D fdt_generic_reg_cells_defaults[i]; + + DB_PRINT_NP(0, "WARNING: no %s for %s container, assuming " + "default of %d\n", size_prop_name, pnp, + size_default); + nc =3D size_default; + error_free(errp); + errp =3D NULL; + } + + reg.x[i] =3D g_renew(uint64_t, reg.x[i], reg.n + 1); + for (int j =3D 0; j < nc; ++j) { + val <<=3D 32; + val |=3D qemu_fdt_getprop_cell(fdti->fdt, node_path, + extended ? "reg-extended" + : "reg", + cell_idx + j, &errp); + if (errp) { + val =3D 0; + break; + } + } + reg.x[i][reg.n] =3D val; + cell_idx +=3D nc; + if (errp) { + goto exit_reg_parse; + } + } + } + +exit_reg_parse: + if (object_dynamic_cast(dev, TYPE_FDT_GENERIC_MMAP)) { + FDTGenericMMapClass *fmc =3D FDT_GENERIC_MMAP_GET_CLASS(dev); + if (fmc->parse_reg) { + while (fmc->parse_reg(FDT_GENERIC_MMAP(dev), reg, + &error_abort) && qemu_in_coroutine()) { + fdt_init_yield(fdti); + } + } + } + + return; +} + static int fdt_init_qdev(char *node_path, FDTMachineInfo *fdti, char *comp= at) { Object *dev, *parent; @@ -972,6 +1099,8 @@ static int fdt_init_qdev(char *node_path, FDTMachineIn= fo *fdti, char *compat) } } =20 + fdt_parse_node_reg_prop(fdti, node_path, dev); + g_free(dev_type); g_free(props); =20 --=20 2.43.0