From nobody Wed Feb 11 00:56:14 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 1632389239607393.4900315749418; Thu, 23 Sep 2021 02:27:19 -0700 (PDT) Received: from localhost ([::1]:45146 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mTL0g-0003CB-6j for importer@patchew.org; Thu, 23 Sep 2021 05:27:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42860) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTKo0-0002S5-23 for qemu-devel@nongnu.org; Thu, 23 Sep 2021 05:14:12 -0400 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:48674 helo=mail.default.ilande.bv.iomart.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTKnx-0007sC-V2 for qemu-devel@nongnu.org; Thu, 23 Sep 2021 05:14:11 -0400 Received: from [2a00:23c4:8b9d:4100:5d98:71b5:90ca:dad1] (helo=kentang.home) by mail.default.ilande.bv.iomart.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mTKnm-0003vl-5F; Thu, 23 Sep 2021 10:14:02 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, laurent@vivier.eu Date: Thu, 23 Sep 2021 10:13:00 +0100 Message-Id: <20210923091308.13832-13-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210923091308.13832-1-mark.cave-ayland@ilande.co.uk> References: <20210923091308.13832-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 2a00:23c4:8b9d:4100:5d98:71b5:90ca:dad1 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH v5 12/20] nubus: move nubus to its own 32-bit address space X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.bv.iomart.io) 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=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.default.ilande.bv.iomart.io 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_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: 2.1.23 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-ZM-MESSAGEID: 1632389240850100001 According to "Designing Cards and Drivers for the Macintosh Family" the Nub= us has its own 32-bit address space based upon physical slot addressing. Move Nubus to its own 32-bit address space and then use memory region alias= es to map available slot and super slot ranges into the q800 system address space via the Macintosh Nubus bridge. Signed-off-by: Mark Cave-Ayland Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Laurent Vivier --- hw/m68k/q800.c | 9 ++++----- hw/nubus/mac-nubus-bridge.c | 16 ++++++++++++++-- hw/nubus/nubus-bus.c | 18 ++++++++++++++++++ include/hw/nubus/mac-nubus-bridge.h | 2 ++ include/hw/nubus/nubus.h | 6 ++++++ 5 files changed, 44 insertions(+), 7 deletions(-) diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c index 5ba87f789c..a07912b87c 100644 --- a/hw/m68k/q800.c +++ b/hw/m68k/q800.c @@ -67,9 +67,6 @@ #define ASC_BASE (IO_BASE + 0x14000) #define SWIM_BASE (IO_BASE + 0x1E000) =20 -#define NUBUS_SUPER_SLOT_BASE 0x60000000 -#define NUBUS_SLOT_BASE 0xf0000000 - #define SONIC_PROM_SIZE 0x1000 =20 /* @@ -396,8 +393,10 @@ static void q800_init(MachineState *machine) =20 dev =3D qdev_new(TYPE_MAC_NUBUS_BRIDGE); sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); - sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, NUBUS_SUPER_SLOT_BASE); - sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, NUBUS_SLOT_BASE); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, + MAC_NUBUS_FIRST_SLOT * NUBUS_SUPER_SLOT_SIZE); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, NUBUS_SLOT_BASE + + MAC_NUBUS_FIRST_SLOT * NUBUS_SLOT_SIZE); =20 nubus =3D MAC_NUBUS_BRIDGE(dev)->bus; =20 diff --git a/hw/nubus/mac-nubus-bridge.c b/hw/nubus/mac-nubus-bridge.c index 3f075789e9..3af4f5d396 100644 --- a/hw/nubus/mac-nubus-bridge.c +++ b/hw/nubus/mac-nubus-bridge.c @@ -22,8 +22,20 @@ static void mac_nubus_bridge_init(Object *obj) s->bus->slot_available_mask =3D MAKE_64BIT_MASK(MAC_NUBUS_FIRST_SLOT, MAC_NUBUS_SLOT_NB); =20 - sysbus_init_mmio(sbd, &s->bus->super_slot_io); - sysbus_init_mmio(sbd, &s->bus->slot_io); + /* Aliases for slots 0x9 to 0xe */ + memory_region_init_alias(&s->super_slot_alias, obj, "super-slot-alias", + &s->bus->nubus_mr, + MAC_NUBUS_FIRST_SLOT * NUBUS_SUPER_SLOT_SIZE, + MAC_NUBUS_SLOT_NB * NUBUS_SUPER_SLOT_SIZE); + + memory_region_init_alias(&s->slot_alias, obj, "slot-alias", + &s->bus->nubus_mr, + NUBUS_SLOT_BASE + + MAC_NUBUS_FIRST_SLOT * NUBUS_SLOT_SIZE, + MAC_NUBUS_SLOT_NB * NUBUS_SLOT_SIZE); + + sysbus_init_mmio(sbd, &s->super_slot_alias); + sysbus_init_mmio(sbd, &s->slot_alias); } =20 static void mac_nubus_bridge_class_init(ObjectClass *klass, void *data) diff --git a/hw/nubus/nubus-bus.c b/hw/nubus/nubus-bus.c index 3db8272524..40d9068c59 100644 --- a/hw/nubus/nubus-bus.c +++ b/hw/nubus/nubus-bus.c @@ -78,25 +78,42 @@ static const MemoryRegionOps nubus_super_slot_ops =3D { }, }; =20 +static void nubus_unrealize(BusState *bus) +{ + NubusBus *nubus =3D NUBUS_BUS(bus); + + address_space_destroy(&nubus->nubus_as); +} + static void nubus_realize(BusState *bus, Error **errp) { + NubusBus *nubus =3D NUBUS_BUS(bus); + if (!nubus_find()) { error_setg(errp, "at most one %s device is permitted", TYPE_NUBUS_= BUS); return; } + + address_space_init(&nubus->nubus_as, &nubus->nubus_mr, "nubus"); } =20 static void nubus_init(Object *obj) { NubusBus *nubus =3D NUBUS_BUS(obj); =20 + memory_region_init(&nubus->nubus_mr, obj, "nubus", 0x100000000); + memory_region_init_io(&nubus->super_slot_io, obj, &nubus_super_slot_op= s, nubus, "nubus-super-slots", (NUBUS_SUPER_SLOT_NB + 1) * NUBUS_SUPER_SLOT_SIZ= E); + memory_region_add_subregion(&nubus->nubus_mr, 0x0, &nubus->super_slot_= io); =20 memory_region_init_io(&nubus->slot_io, obj, &nubus_slot_ops, nubus, "nubus-slots", NUBUS_SLOT_NB * NUBUS_SLOT_SIZE); + memory_region_add_subregion(&nubus->nubus_mr, + (NUBUS_SUPER_SLOT_NB + 1) * + NUBUS_SUPER_SLOT_SIZE, &nubus->slot_io); =20 nubus->slot_available_mask =3D MAKE_64BIT_MASK(NUBUS_FIRST_SLOT, NUBUS_SLOT_NB); @@ -151,6 +168,7 @@ static void nubus_class_init(ObjectClass *oc, void *dat= a) BusClass *bc =3D BUS_CLASS(oc); =20 bc->realize =3D nubus_realize; + bc->unrealize =3D nubus_unrealize; bc->check_address =3D nubus_check_address; bc->get_dev_path =3D nubus_get_dev_path; } diff --git a/include/hw/nubus/mac-nubus-bridge.h b/include/hw/nubus/mac-nub= us-bridge.h index 118d67267d..04451d357c 100644 --- a/include/hw/nubus/mac-nubus-bridge.h +++ b/include/hw/nubus/mac-nubus-bridge.h @@ -23,6 +23,8 @@ struct MacNubusState { SysBusDevice sysbus_dev; =20 NubusBus *bus; + MemoryRegion super_slot_alias; + MemoryRegion slot_alias; }; =20 #endif diff --git a/include/hw/nubus/nubus.h b/include/hw/nubus/nubus.h index 73a9d8cb7f..f2c8c22c05 100644 --- a/include/hw/nubus/nubus.h +++ b/include/hw/nubus/nubus.h @@ -17,6 +17,9 @@ #define NUBUS_SUPER_SLOT_SIZE 0x10000000U #define NUBUS_SUPER_SLOT_NB 0xe =20 +#define NUBUS_SLOT_BASE (NUBUS_SUPER_SLOT_SIZE * \ + (NUBUS_SUPER_SLOT_NB + 1)) + #define NUBUS_SLOT_SIZE 0x01000000 #define NUBUS_FIRST_SLOT 0x0 #define NUBUS_LAST_SLOT 0xf @@ -33,6 +36,9 @@ OBJECT_DECLARE_SIMPLE_TYPE(NubusBus, NUBUS_BUS) struct NubusBus { BusState qbus; =20 + AddressSpace nubus_as; + MemoryRegion nubus_mr; + MemoryRegion super_slot_io; MemoryRegion slot_io; =20 --=20 2.20.1