From nobody Fri May 17 04:59:48 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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; dmarc=fail(p=none dis=none) header.from=sigbus.net Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16246554097135.254518429534983; Fri, 25 Jun 2021 14:10:09 -0700 (PDT) Received: from localhost ([::1]:57672 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lwt5T-00055v-Io for importer@patchew.org; Fri, 25 Jun 2021 17:10:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60422) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lwt4g-0004LB-BY for qemu-devel@nongnu.org; Fri, 25 Jun 2021 17:09:18 -0400 Received: from phong.sigbus.net ([2605:2700:0:17:a800:ff:fe3e:ad08]:54464) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lwt4d-0003MQ-Ni for qemu-devel@nongnu.org; Fri, 25 Jun 2021 17:09:18 -0400 Received: (nullmailer pid 1870328 invoked by uid 1000); Fri, 25 Jun 2021 21:02:14 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=sigbus.net; s=2020; t=1624654934; bh=wtugsWe9E6HXj/QraXbFEI1U4PdNbjFc2Y91F4CKS3w=; h=From:To:Cc:Subject:Date:From; b=Y1Fp0TRWnIYUJE+H74MzsfymLIELNETIy0txIgRmTCsA9b09+jDUxScPnrS/Iih/b KF/041mHGhOgHunEYjSFsnD/M7ZPmUDUbtBYwU0FFfUbzrkQt1ye0UPB3T8VmkNs+R QgG1BVAbimID+FKgOsyne21kgbPWwpdh3Mao9AvPNKKD+X6uFEMaiSfbep2u9Q4Mey pUZFdHTfZFp0rt/iMBS3oZc/5F3siACHQoskW+V4yjWJUUs7WtqZnHDCCLDZsvGPGn AUl9P4z6emMA+8o7/rZTdGzfHgSJ+cGNUBBgZKHs9qsVJNiyzJbhRR07lRt6V4HaTZ 8NBTTCMZwu/HA== From: Nolan Leake To: qemu-devel@nongnu.org Subject: [PATCH v3] Add basic power management to raspi. Date: Fri, 25 Jun 2021 14:02:09 -0700 Message-Id: <20210625210209.1870217-1-nolan@sigbus.net> X-Mailer: git-send-email 2.30.2 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: none client-ip=2605:2700:0:17:a800:ff:fe3e:ad08; envelope-from=nolan@voxel.sigbus.net; helo=phong.sigbus.net X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, NO_DNS_FOR_FROM=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_NONE=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: , Cc: Peter Maydell , Nolan Leake , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Andrew Baumann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This is just enough to make reboot and poweroff work. Works for linux, u-boot, and the arm trusted firmware. Not tested, but should work for plan9, and bare-metal/hobby OSes, since they seem to generally do what linux does for reset. The watchdog timer functionality is not yet implemented. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/64 Signed-off-by: Nolan Leake Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 --- hw/arm/bcm2835_peripherals.c | 13 ++- hw/misc/bcm2835_powermgt.c | 160 +++++++++++++++++++++++++++ hw/misc/meson.build | 1 + include/hw/arm/bcm2835_peripherals.h | 3 +- include/hw/misc/bcm2835_powermgt.h | 29 +++++ 5 files changed, 204 insertions(+), 2 deletions(-) create mode 100644 hw/misc/bcm2835_powermgt.c create mode 100644 include/hw/misc/bcm2835_powermgt.h diff --git hw/arm/bcm2835_peripherals.c hw/arm/bcm2835_peripherals.c index dcff13433e..48538c9360 100644 --- hw/arm/bcm2835_peripherals.c +++ hw/arm/bcm2835_peripherals.c @@ -126,6 +126,10 @@ static void bcm2835_peripherals_init(Object *obj) =20 object_property_add_const_link(OBJECT(&s->dwc2), "dma-mr", OBJECT(&s->gpu_bus_mr)); + + /* Power Management */ + object_initialize_child(obj, "powermgt", &s->powermgt, + TYPE_BCM2835_POWERMGT); } =20 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) @@ -364,9 +368,16 @@ static void bcm2835_peripherals_realize(DeviceState *d= ev, Error **errp) qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, INTERRUPT_USB)); =20 + /* Power Management */ + if (!sysbus_realize(SYS_BUS_DEVICE(&s->powermgt), errp)) { + return; + } + + memory_region_add_subregion(&s->peri_mr, PM_OFFSET, + sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->powermgt), 0)); + create_unimp(s, &s->txp, "bcm2835-txp", TXP_OFFSET, 0x1000); create_unimp(s, &s->armtmr, "bcm2835-sp804", ARMCTRL_TIMER0_1_OFFSET, = 0x40); - create_unimp(s, &s->powermgt, "bcm2835-powermgt", PM_OFFSET, 0x114); create_unimp(s, &s->i2s, "bcm2835-i2s", I2S_OFFSET, 0x100); create_unimp(s, &s->smi, "bcm2835-smi", SMI_OFFSET, 0x100); create_unimp(s, &s->spi[0], "bcm2835-spi0", SPI0_OFFSET, 0x20); diff --git hw/misc/bcm2835_powermgt.c hw/misc/bcm2835_powermgt.c new file mode 100644 index 0000000000..dcdd6d1ea7 --- /dev/null +++ hw/misc/bcm2835_powermgt.c @@ -0,0 +1,160 @@ +/* + * BCM2835 Power Management emulation + * + * Copyright (C) 2017 Marcin Chojnacki + * Copyright (C) 2021 Nolan Leake + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "hw/misc/bcm2835_powermgt.h" +#include "migration/vmstate.h" +#include "sysemu/runstate.h" + +#define PASSWORD 0x5a000000 +#define PASSWORD_MASK 0xff000000 + +#define R_RSTC 0x1c +#define V_RSTC_RESET 0x20 +#define R_RSTS 0x20 +#define V_RSTS_POWEROFF 0x555 /* Linux uses partition 63 to indicate halt.= */ +#define R_WDOG 0x24 + +static uint64_t bcm2835_powermgt_read(void *opaque, hwaddr offset, + unsigned size) +{ + BCM2835PowerMgtState *s =3D (BCM2835PowerMgtState *)opaque; + uint32_t res =3D 0; + + switch (offset) { + case R_RSTC: + res =3D s->rstc; + break; + case R_RSTS: + res =3D s->rsts; + break; + case R_WDOG: + res =3D s->wdog; + break; + + default: + qemu_log_mask(LOG_UNIMP, + "bcm2835_powermgt_read: Unknown offset 0x%08"HWADDR_= PRIx + "\n", offset); + res =3D 0; + break; + } + + return res; +} + +static void bcm2835_powermgt_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + BCM2835PowerMgtState *s =3D (BCM2835PowerMgtState *)opaque; + + if ((value & PASSWORD_MASK) !=3D PASSWORD) { + qemu_log_mask(LOG_GUEST_ERROR, + "bcm2835_powermgt_write: Bad password 0x%"PRIx64 + " at offset 0x%08"HWADDR_PRIx"\n", + value, offset); + return; + } + + value =3D value & ~PASSWORD_MASK; + + switch (offset) { + case R_RSTC: + s->rstc =3D value; + if (value & V_RSTC_RESET) { + if ((s->rsts & 0xfff) =3D=3D V_RSTS_POWEROFF) { + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN= ); + } else { + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + } + } + break; + case R_RSTS: + qemu_log_mask(LOG_UNIMP, + "bcm2835_powermgt_write: RSTS\n"); + s->rsts =3D value; + break; + case R_WDOG: + qemu_log_mask(LOG_UNIMP, + "bcm2835_powermgt_write: WDOG\n"); + s->wdog =3D value; + break; + + default: + qemu_log_mask(LOG_UNIMP, + "bcm2835_powermgt_write: Unknown offset 0x%08"HWADDR= _PRIx + "\n", offset); + break; + } +} + +static const MemoryRegionOps bcm2835_powermgt_ops =3D { + .read =3D bcm2835_powermgt_read, + .write =3D bcm2835_powermgt_write, + .endianness =3D DEVICE_NATIVE_ENDIAN, + .impl.min_access_size =3D 4, + .impl.max_access_size =3D 4, +}; + +static const VMStateDescription vmstate_bcm2835_powermgt =3D { + .name =3D TYPE_BCM2835_POWERMGT, + .version_id =3D 1, + .minimum_version_id =3D 1, + .fields =3D (VMStateField[]) { + VMSTATE_UINT32(rstc, BCM2835PowerMgtState), + VMSTATE_UINT32(rsts, BCM2835PowerMgtState), + VMSTATE_UINT32(wdog, BCM2835PowerMgtState), + VMSTATE_END_OF_LIST() + } +}; + +static void bcm2835_powermgt_init(Object *obj) +{ + BCM2835PowerMgtState *s =3D BCM2835_POWERMGT(obj); + + memory_region_init_io(&s->iomem, obj, &bcm2835_powermgt_ops, s, + TYPE_BCM2835_POWERMGT, 0x114); + sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); +} + +static void bcm2835_powermgt_reset(DeviceState *dev) +{ + BCM2835PowerMgtState *s =3D BCM2835_POWERMGT(dev); + + /* https://elinux.org/BCM2835_registers#PM */ + s->rstc =3D 0x00000102; + s->rsts =3D 0x00001000; + s->wdog =3D 0x00000000; +} + +static void bcm2835_powermgt_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + + dc->reset =3D bcm2835_powermgt_reset; + dc->vmsd =3D &vmstate_bcm2835_powermgt; +} + +static TypeInfo bcm2835_powermgt_info =3D { + .name =3D TYPE_BCM2835_POWERMGT, + .parent =3D TYPE_SYS_BUS_DEVICE, + .instance_size =3D sizeof(BCM2835PowerMgtState), + .class_init =3D bcm2835_powermgt_class_init, + .instance_init =3D bcm2835_powermgt_init, +}; + +static void bcm2835_powermgt_register_types(void) +{ + type_register_static(&bcm2835_powermgt_info); +} + +type_init(bcm2835_powermgt_register_types) diff --git hw/misc/meson.build hw/misc/meson.build index 66e1648533..f89b5c1643 100644 --- hw/misc/meson.build +++ hw/misc/meson.build @@ -82,6 +82,7 @@ softmmu_ss.add(when: 'CONFIG_RASPI', if_true: files( 'bcm2835_rng.c', 'bcm2835_thermal.c', 'bcm2835_cprman.c', + 'bcm2835_powermgt.c', )) softmmu_ss.add(when: 'CONFIG_SLAVIO', if_true: files('slavio_misc.c')) softmmu_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq_slcr.c', 'zynq-xa= dc.c')) diff --git include/hw/arm/bcm2835_peripherals.h include/hw/arm/bcm2835_peri= pherals.h index 479e2346e8..d864879421 100644 --- include/hw/arm/bcm2835_peripherals.h +++ include/hw/arm/bcm2835_peripherals.h @@ -24,6 +24,7 @@ #include "hw/misc/bcm2835_mphi.h" #include "hw/misc/bcm2835_thermal.h" #include "hw/misc/bcm2835_cprman.h" +#include "hw/misc/bcm2835_powermgt.h" #include "hw/sd/sdhci.h" #include "hw/sd/bcm2835_sdhost.h" #include "hw/gpio/bcm2835_gpio.h" @@ -48,7 +49,7 @@ struct BCM2835PeripheralState { BCM2835MphiState mphi; UnimplementedDeviceState txp; UnimplementedDeviceState armtmr; - UnimplementedDeviceState powermgt; + BCM2835PowerMgtState powermgt; BCM2835CprmanState cprman; PL011State uart0; BCM2835AuxState aux; diff --git include/hw/misc/bcm2835_powermgt.h include/hw/misc/bcm2835_power= mgt.h new file mode 100644 index 0000000000..303b9a6f68 --- /dev/null +++ include/hw/misc/bcm2835_powermgt.h @@ -0,0 +1,29 @@ +/* + * BCM2835 Power Management emulation + * + * Copyright (C) 2017 Marcin Chojnacki + * Copyright (C) 2021 Nolan Leake + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#ifndef BCM2835_POWERMGT_H +#define BCM2835_POWERMGT_H + +#include "hw/sysbus.h" +#include "qom/object.h" + +#define TYPE_BCM2835_POWERMGT "bcm2835-powermgt" +OBJECT_DECLARE_SIMPLE_TYPE(BCM2835PowerMgtState, BCM2835_POWERMGT) + +struct BCM2835PowerMgtState { + SysBusDevice busdev; + MemoryRegion iomem; + + uint32_t rstc; + uint32_t rsts; + uint32_t wdog; +}; + +#endif --=20 2.30.2