From nobody Wed Feb 11 05:38:39 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1667556301593570.8619989375055; Fri, 4 Nov 2022 03:05:01 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oqtXF-0005r4-5O; Fri, 04 Nov 2022 06:02:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oqtVI-0002O4-04 for qemu-devel@nongnu.org; Fri, 04 Nov 2022 06:00:50 -0400 Received: from mail.loongson.cn ([114.242.206.163] helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oqtVA-0000un-8n for qemu-devel@nongnu.org; Fri, 04 Nov 2022 06:00:47 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxXbbE4mRjs3sEAA--.3286S3; Fri, 04 Nov 2022 18:00:36 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxPuDC4mRjYmUNAA--.37849S5; Fri, 04 Nov 2022 18:00:36 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, stefanha@gmail.com, Xiaojuan Yang Subject: [PULL v2 3/9] hw/loongarch: Load FDT table into dram memory space Date: Fri, 4 Nov 2022 18:00:27 +0800 Message-Id: <20221104100033.3473980-4-gaosong@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221104100033.3473980-1-gaosong@loongson.cn> References: <20221104100033.3473980-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxPuDC4mRjYmUNAA--.37849S5 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjvJXoWxGry8Gw4UXr1Uur4kJrW5Wrg_yoW5Ar1rpF y3uFn3Wr40qrsrWrn2gFyUuF1UArn7Ca42gFW29r4FkFyDWr109rW8A3yqyFy8A34rXFWY vFyvqrWfW3W8J3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bn8Fc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7 CjxVAFwI0_Cr1j6rxdM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E 6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6x8ErcxFaVAv8VWrMcvjeVCFs4IE7x kEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv 6cx26rWl4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x 8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE 2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42 xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF 7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvj4RC_MaUUUUU 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=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1667556302680100001 Content-Type: text/plain; charset="utf-8" From: Xiaojuan Yang Load FDT table into dram memory space, and the addr is 2 MiB. Since lowmem region starts from 0, FDT base address is located at 2 MiB to avoid NULL pointer access. Signed-off-by: Xiaojuan Yang Acked-by: Song Gao Message-Id: <20221028014007.2718352-2-yangxiaojuan@loongson.cn> Signed-off-by: Song Gao --- hw/loongarch/virt.c | 18 +++++++++++------- include/hw/loongarch/virt.h | 3 --- 2 files changed, 11 insertions(+), 10 deletions(-) diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c index 4b595a9ea4..50e9829a94 100644 --- a/hw/loongarch/virt.c +++ b/hw/loongarch/virt.c @@ -159,7 +159,6 @@ static void fdt_add_pcie_node(const LoongArchMachineSta= te *lams) 1, FDT_PCI_RANGE_MMIO, 2, base_mmio, 2, base_mmio, 2, size_mmio); g_free(nodename); - qemu_fdt_dumpdtb(ms->fdt, lams->fdt_size); } =20 static void fdt_add_irqchip_node(LoongArchMachineState *lams) @@ -656,6 +655,7 @@ static void loongarch_init(MachineState *machine) MemoryRegion *address_space_mem =3D get_system_memory(); LoongArchMachineState *lams =3D LOONGARCH_MACHINE(machine); int i; + hwaddr fdt_base; =20 if (!cpu_model) { cpu_model =3D LOONGARCH_CPU_TYPE_NAME("la464"); @@ -760,12 +760,16 @@ static void loongarch_init(MachineState *machine) lams->machine_done.notify =3D virt_machine_done; qemu_add_machine_init_done_notifier(&lams->machine_done); fdt_add_pcie_node(lams); - - /* load fdt */ - MemoryRegion *fdt_rom =3D g_new(MemoryRegion, 1); - memory_region_init_rom(fdt_rom, NULL, "fdt", VIRT_FDT_SIZE, &error_fat= al); - memory_region_add_subregion(get_system_memory(), VIRT_FDT_BASE, fdt_ro= m); - rom_add_blob_fixed("fdt", machine->fdt, lams->fdt_size, VIRT_FDT_BASE); + /* + * Since lowmem region starts from 0, FDT base address is located + * at 2 MiB to avoid NULL pointer access. + * + * Put the FDT into the memory map as a ROM image: this will ensure + * the FDT is copied again upon reset, even if addr points into RAM. + */ + fdt_base =3D 2 * MiB; + qemu_fdt_dumpdtb(machine->fdt, lams->fdt_size); + rom_add_blob_fixed("fdt", machine->fdt, lams->fdt_size, fdt_base); } =20 bool loongarch_is_acpi_enabled(LoongArchMachineState *lams) diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h index 09f1c88ee5..45c383f5a7 100644 --- a/include/hw/loongarch/virt.h +++ b/include/hw/loongarch/virt.h @@ -28,9 +28,6 @@ #define VIRT_GED_MEM_ADDR (VIRT_GED_EVT_ADDR + ACPI_GED_EVT_SEL_LEN) #define VIRT_GED_REG_ADDR (VIRT_GED_MEM_ADDR + MEMORY_HOTPLUG_IO_LEN) =20 -#define VIRT_FDT_BASE 0x1c400000 -#define VIRT_FDT_SIZE 0x100000 - struct LoongArchMachineState { /*< private >*/ MachineState parent_obj; --=20 2.31.1