From nobody Thu Dec 18 13:28:40 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1488302391318738.4061989333173; Tue, 28 Feb 2017 09:19:51 -0800 (PST) Received: from localhost ([::1]:35782 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cilRD-0003gR-T9 for importer@patchew.org; Tue, 28 Feb 2017 12:19:47 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43194) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cilNv-0001fN-3p for qemu-devel@nongnu.org; Tue, 28 Feb 2017 12:16:24 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cilNt-00030U-Li for qemu-devel@nongnu.org; Tue, 28 Feb 2017 12:16:23 -0500 Received: from orth.archaic.org.uk ([2001:8b0:1d0::2]:48711) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cilNt-0002xz-EL for qemu-devel@nongnu.org; Tue, 28 Feb 2017 12:16:21 -0500 Received: from pm215 by orth.archaic.org.uk with local (Exim 4.84_2) (envelope-from ) id 1cilNs-0003QM-Eg for qemu-devel@nongnu.org; Tue, 28 Feb 2017 17:16:20 +0000 From: Peter Maydell To: qemu-devel@nongnu.org Date: Tue, 28 Feb 2017 17:16:00 +0000 Message-Id: <1488302176-19463-6-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1488302176-19463-1-git-send-email-peter.maydell@linaro.org> References: <1488302176-19463-1-git-send-email-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:8b0:1d0::2 Subject: [Qemu-devel] [PULL 05/21] armv7m: Make ARMv7M object take memory region link X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Make the ARMv7M object take a memory region link which it uses to wire up the bitband rather than having them always put themselves in the system address space. Signed-off-by: Peter Maydell Reviewed-by: Alex Benn=C3=A9e Message-id: 1487604965-23220-6-git-send-email-peter.maydell@linaro.org --- include/hw/arm/armv7m.h | 10 ++++++++++ hw/arm/armv7m.c | 23 ++++++++++++++++++++++- 2 files changed, 32 insertions(+), 1 deletion(-) diff --git a/include/hw/arm/armv7m.h b/include/hw/arm/armv7m.h index 193ad71..3333c91 100644 --- a/include/hw/arm/armv7m.h +++ b/include/hw/arm/armv7m.h @@ -35,6 +35,9 @@ typedef struct { * + Named GPIO output SYSRESETREQ: signalled for guest AIRCR.SYSRESETREQ * + Property "cpu-model": CPU model to instantiate * + Property "num-irq": number of external IRQ lines + * + Property "memory": MemoryRegion defining the physical address space + * that CPU accesses see. (The NVIC, bitbanding and other CPU-internal + * devices will be automatically layered on top of this view.) */ typedef struct ARMv7MState { /*< private >*/ @@ -44,8 +47,15 @@ typedef struct ARMv7MState { BitBandState bitband[ARMV7M_NUM_BITBANDS]; ARMCPU *cpu; =20 + /* MemoryRegion we pass to the CPU, with our devices layered on + * top of the ones the board provides in board_memory. + */ + MemoryRegion container; + /* Properties */ char *cpu_model; + /* MemoryRegion the board provides to us (with its devices, RAM, etc) = */ + MemoryRegion *board_memory; } ARMv7MState; =20 #endif diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c index d9baa8c..3332f34 100644 --- a/hw/arm/armv7m.c +++ b/hw/arm/armv7m.c @@ -18,6 +18,7 @@ #include "elf.h" #include "sysemu/qtest.h" #include "qemu/error-report.h" +#include "exec/address-spaces.h" =20 /* Bitbanded IO. Each word corresponds to a single bit. */ =20 @@ -148,6 +149,14 @@ static void armv7m_instance_init(Object *obj) =20 /* Can't init the cpu here, we don't yet know which model to use */ =20 + object_property_add_link(obj, "memory", + TYPE_MEMORY_REGION, + (Object **)&s->board_memory, + qdev_prop_allow_set_link_before_realize, + OBJ_PROP_LINK_UNREF_ON_RELEASE, + &error_abort); + memory_region_init(&s->container, obj, "armv7m-container", UINT64_MAX); + object_initialize(&s->nvic, sizeof(s->nvic), "armv7m_nvic"); qdev_set_parent_bus(DEVICE(&s->nvic), sysbus_get_default()); object_property_add_alias(obj, "num-irq", @@ -169,6 +178,13 @@ static void armv7m_realize(DeviceState *dev, Error **e= rrp) const char *typename; CPUClass *cc; =20 + if (!s->board_memory) { + error_setg(errp, "memory property was not set"); + return; + } + + memory_region_add_subregion_overlap(&s->container, 0, s->board_memory,= -1); + cpustr =3D g_strsplit(s->cpu_model, ",", 2); =20 oc =3D cpu_class_by_name(TYPE_ARM_CPU, cpustr[0]); @@ -193,6 +209,8 @@ static void armv7m_realize(DeviceState *dev, Error **er= rp) return; } =20 + object_property_set_link(OBJECT(s->cpu), OBJECT(&s->container), "memor= y", + &error_abort); object_property_set_bool(OBJECT(s->cpu), true, "realized", &err); if (err !=3D NULL) { error_propagate(errp, err); @@ -233,7 +251,8 @@ static void armv7m_realize(DeviceState *dev, Error **er= rp) return; } =20 - sysbus_mmio_map(sbd, 0, bitband_output_addr[i]); + memory_region_add_subregion(&s->container, bitband_output_addr[i], + sysbus_mmio_get_region(sbd, 0)); } } =20 @@ -281,6 +300,8 @@ DeviceState *armv7m_init(MemoryRegion *system_memory, i= nt mem_size, int num_irq, armv7m =3D qdev_create(NULL, "armv7m"); qdev_prop_set_uint32(armv7m, "num-irq", num_irq); qdev_prop_set_string(armv7m, "cpu-model", cpu_model); + object_property_set_link(OBJECT(armv7m), OBJECT(get_system_memory()), + "memory", &error_abort); /* This will exit with an error if the user passed us a bad cpu_model = */ qdev_init_nofail(armv7m); =20 --=20 2.7.4