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[109.242.227.98]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5c0bb1c29b9sm1712814a12.18.2024.08.27.21.12.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 21:12:34 -0700 (PDT) From: Manos Pitsidianakis Date: Wed, 28 Aug 2024 07:11:50 +0300 Subject: [PATCH RESEND v9 9/9] rust: add PL011 device model MIME-Version: 1.0 Message-Id: <20240828-rust-pl011-v9-9-35579191f17c@linaro.org> References: <20240828-rust-pl011-v9-0-35579191f17c@linaro.org> In-Reply-To: <20240828-rust-pl011-v9-0-35579191f17c@linaro.org> To: qemu-devel@nongnu.org Cc: Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Thomas Huth , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Pierrick Bouvier , Richard Henderson , Gustavo Romero , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Junjie Mao , Zhao Liu , Manos Pitsidianakis X-Mailer: b4 0.15-dev-c2c95 X-Developer-Signature: v=1; a=openpgp-sha256; l=91643; i=manos.pitsidianakis@linaro.org; h=from:subject:message-id; bh=HQNktfVLiqhTk7PXsGPxU/5OZoorE//I99vyOJMPYrM=; b=LS0tLS1CRUdJTiBQR1AgTUVTU0FHRS0tLS0tCgpvd0VCYlFLUy9aQU5Bd0FLQVhjcHgzQi9mZ 25RQWNzbVlnQm16cU9NRWlpNWIyUG1QV0dKNFE4MlJUVGNoTWlMClhUSzkrV1N6RzNxQWxIeXVL VjJKQWpNRUFBRUtBQjBXSVFUTVhCdE9SS0JXODRkd0hSQjNLY2R3ZjM0SjBBVUMKWnM2ampBQUt DUkIzS2Nkd2YzNEowQW5WRC85M2JXbGVWNllHMUJHMXBjTFJpUU15a1UrUHhFUEtTQnNvc256Ng phZ1RBVlRhWTM1NVpBVU5keUFCZHRUWG5HamNIc1h6NHJOZXFIQzhaSk1vZFhLeWh6T0U0OFNrS EpiZW9vQldLCmhpNVd1Qnp4T29DNWNIYStzSnhuUHFxalA3bllqajdpRkhkcFdPS3lhaGZ4YkFq c3dlVEJvb2I2T0FUZWQyUisKZGlJN1BRaWltc0x1dVF2YTE2dGNseE1HNXp0bnpIdmlkUExFQXB CaG9ENkd6MXdJNUpuWlhVM0dablBialYxZwp6bTY0NU5FYUNyT2laVVNKNUptbGRYaEZMd0RrZ0 dDc2xMeFp5cHl3S3Z0MG1xUmVIUG5HK0MxMTF6SFBWTnlMCnB0dy9TTmhWRUQvRks5cHEzd2pNb 1pJTnBlYlZkZnBsdFRNV2Uyb0xMMGNWVzR4TlNOVi9Cc0prMjlxREZlZE0Kc1lvcnF3YlJCRnR6 K0prdzBCWms1SkY5b083K2h2bklScXdiQ0d0ekxiajQxN3E2ckdXVkpUNFJ4N1pEQ24rQgpqSUd saUZnTi96U29Wd0tkMnR1cXVXaEl2cVlrcVREdXdjSExySjNWS1JQME1GdENiT254S2g4UUlncG J2VXhWCko5eUU3aGgyT3pzeWhyWVNqWXJSZEp1akliNWdyU0paYmdNUHBSTTJYNGFTYStmaFdTR WozYUZqbkRxeU5ldWIKY3RQZ1dDd1JnbThCU2pjdk41UTV2U1FSTWFHSC9tVVdhQlduWHllalha cVpUN05ZSjZLQks4akd6K01kL2tSMwp1dVArMTRsbzF6c3FNaEtBU1VkbU9hMzFYVTdWeUZmQkV Yai8xZ3luS3VUald0SXNYTzBWOUNWMHF6cm9GMmsvCk1oMVZ5Zz09Cj1jT3dzCi0tLS0tRU5EIF BHUCBNRVNTQUdFLS0tLS0K X-Developer-Key: i=manos.pitsidianakis@linaro.org; a=openpgp; fpr=7C721DF9DB3CC7182311C0BF68BC211D47B421E1 Received-SPF: pass client-ip=2a00:1450:4864:20::529; envelope-from=manos.pitsidianakis@linaro.org; helo=mail-ed1-x529.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This commit adds a re-implementation of hw/char/pl011.c in Rust. How to build: 1. Configure a QEMU build with: --enable-system --target-list=aarch64-softmmu --enable-rust 2. Launching a VM with qemu-system-aarch64 should use the Rust version of the pl011 device Co-authored-by: Junjie Mao Co-authored-by: Paolo Bonzini Signed-off-by: Junjie Mao Signed-off-by: Paolo Bonzini Signed-off-by: Manos Pitsidianakis --- MAINTAINERS | 5 + meson.build | 24 + hw/arm/Kconfig | 33 +- rust/Kconfig | 1 + rust/hw/Kconfig | 2 + rust/hw/char/Kconfig | 3 + rust/hw/char/meson.build | 1 + rust/hw/char/pl011/.gitignore | 2 + rust/hw/char/pl011/Cargo.lock | 134 +++++ rust/hw/char/pl011/Cargo.toml | 26 + rust/hw/char/pl011/README.md | 31 ++ rust/hw/char/pl011/meson.build | 26 + rust/hw/char/pl011/src/definitions.rs | 20 + rust/hw/char/pl011/src/device.rs | 594 +++++++++++++++++++++ rust/hw/char/pl011/src/device_class.rs | 59 ++ rust/hw/char/pl011/src/lib.rs | 585 ++++++++++++++++++++ rust/hw/char/pl011/src/memory_ops.rs | 57 ++ rust/hw/meson.build | 1 + rust/meson.build | 2 + scripts/archive-source.sh | 5 +- scripts/make-release | 5 +- scripts/rust/rust_root_crate.sh | 13 + subprojects/.gitignore | 11 + subprojects/arbitrary-int-1-rs.wrap | 7 + subprojects/bilge-0.2-rs.wrap | 7 + subprojects/bilge-impl-0.2-rs.wrap | 7 + subprojects/either-1-rs.wrap | 7 + subprojects/itertools-0.11-rs.wrap | 7 + .../packagefiles/arbitrary-int-1-rs/meson.build | 19 + subprojects/packagefiles/bilge-0.2-rs/meson.build | 29 + .../packagefiles/bilge-impl-0.2-rs/meson.build | 45 ++ subprojects/packagefiles/either-1-rs/meson.build | 24 + .../packagefiles/itertools-0.11-rs/meson.build | 30 ++ .../packagefiles/proc-macro-error-1-rs/meson.build | 40 ++ .../proc-macro-error-attr-1-rs/meson.build | 32 ++ .../packagefiles/proc-macro2-1-rs/meson.build | 31 ++ subprojects/packagefiles/quote-1-rs/meson.build | 29 + subprojects/packagefiles/syn-2-rs/meson.build | 40 ++ .../packagefiles/unicode-ident-1-rs/meson.build | 20 + subprojects/proc-macro-error-1-rs.wrap | 7 + subprojects/proc-macro-error-attr-1-rs.wrap | 7 + subprojects/proc-macro2-1-rs.wrap | 7 + subprojects/quote-1-rs.wrap | 7 + subprojects/syn-2-rs.wrap | 7 + subprojects/unicode-ident-1-rs.wrap | 7 + 45 files changed, 2043 insertions(+), 13 deletions(-) diff --git a/MAINTAINERS b/MAINTAINERS index 727f3a7a2cfe600ffdb861bafada7db415d020e5..cb65018b4bf3958952ecd7c8d703abee838cc265 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1189,6 +1189,11 @@ F: include/hw/*/microbit*.h F: tests/qtest/microbit-test.c F: docs/system/arm/nrf.rst +ARM PL011 Rust device +M: Manos Pitsidianakis +S: Maintained +F: rust/hw/char/pl011/ + AVR Machines ------------- diff --git a/meson.build b/meson.build index 7f05466d128776ad8dbf403179734e6831b023c0..a4249fc24f77526b14a2fc570498d5ea34f48bbe 100644 --- a/meson.build +++ b/meson.build @@ -3489,6 +3489,7 @@ qom_ss = ss.source_set() system_ss = ss.source_set() specific_fuzz_ss = ss.source_set() specific_ss = ss.source_set() +rust_devices_ss = ss.source_set() stub_ss = ss.source_set() trace_ss = ss.source_set() user_ss = ss.source_set() @@ -4002,6 +4003,29 @@ foreach target : target_dirs arch_srcs += target_specific.sources() arch_deps += target_specific.dependencies() + if have_rust and have_system + target_rust = rust_devices_ss.apply(config_target, strict: false) + crates = [] + foreach dep : target_rust.dependencies() + crates += dep.get_variable('crate') + endforeach + if crates.length() > 0 + rlib_rs = custom_target('rust_' + target.underscorify() + '.rs', + output: 'rust_' + target.underscorify() + '.rs', + command: [find_program('scripts/rust/rust_root_crate.sh')] + crates, + capture: true, + build_by_default: true, + build_always_stale: true) + rlib = static_library('rust_' + target.underscorify(), + rlib_rs, + dependencies: target_rust.dependencies(), + override_options: ['rust_std=2021', 'build.rust_std=2021'], + rust_args: rustc_config_args, + rust_abi: 'c') + arch_deps += declare_dependency(link_whole: [rlib]) + endif + endif + # allow using headers from the dependencies but do not include the sources, # because this emulator only needs those in "objects". For external # dependencies, the full dependency is included below in the executable. diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index 1ad60da7aa2d1fcb157561461c229cb486b65e3a..45438c1bc4b842f6d28005c7efa0a3ac32272d37 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -20,7 +20,8 @@ config ARM_VIRT select PCI_EXPRESS select PCI_EXPRESS_GENERIC_BRIDGE select PFLASH_CFI01 - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL031 # RTC select PL061 # GPIO select GPIO_PWR @@ -80,7 +81,8 @@ config HIGHBANK select AHCI select ARM_TIMER # sp804 select ARM_V7M - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL022 # SPI select PL031 # RTC select PL061 # GPIO @@ -93,7 +95,8 @@ config INTEGRATOR depends on TCG && ARM select ARM_TIMER select INTEGRATOR_DEBUG - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL031 # RTC select PL041 # audio select PL050 # keyboard/mouse @@ -119,7 +122,8 @@ config MUSCA default y depends on TCG && ARM select ARMSSE - select PL011 + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL031 select SPLIT_IRQ select UNIMP @@ -228,7 +232,8 @@ config Z2 depends on TCG && ARM select PFLASH_CFI01 select WM8750 - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PXA2XX config REALVIEW @@ -248,7 +253,8 @@ config REALVIEW select WM8750 # audio codec select LSI_SCSI_PCI select PCI - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL031 # RTC select PL041 # audio codec select PL050 # keyboard/mouse @@ -273,7 +279,8 @@ config SBSA_REF select PCI_EXPRESS select PCI_EXPRESS_GENERIC_BRIDGE select PFLASH_CFI01 - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL031 # RTC select PL061 # GPIO select USB_XHCI_SYSBUS @@ -297,7 +304,8 @@ config STELLARIS select ARM_V7M select CMSDK_APB_WATCHDOG select I2C - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL022 # SPI select PL061 # GPIO select SSD0303 # OLED display @@ -356,7 +364,8 @@ config VEXPRESS select ARM_TIMER # sp804 select LAN9118 select PFLASH_CFI01 - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select PL041 # audio codec select PL181 # display select REALVIEW @@ -440,7 +449,8 @@ config RASPI default y depends on TCG && ARM select FRAMEBUFFER - select PL011 # UART + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select SDHCI select USB_DWC2 select BCM2835_SPI @@ -515,7 +525,8 @@ config XLNX_VERSAL select ARM_GIC select CPU_CLUSTER select DEVICE_TREE - select PL011 + select PL011 if !HAVE_RUST # UART + select X_PL011_RUST if HAVE_RUST # UART select CADENCE select VIRTIO_MMIO select UNIMP diff --git a/rust/Kconfig b/rust/Kconfig index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..f9f5c3909887451f71360a7986d79e57fdb43c91 100644 --- a/rust/Kconfig +++ b/rust/Kconfig @@ -0,0 +1 @@ +source hw/Kconfig diff --git a/rust/hw/Kconfig b/rust/hw/Kconfig new file mode 100644 index 0000000000000000000000000000000000000000..4d934f30afe13ddff418db8ec9e8b8eb25a9e8d0 --- /dev/null +++ b/rust/hw/Kconfig @@ -0,0 +1,2 @@ +# devices Kconfig +source char/Kconfig diff --git a/rust/hw/char/Kconfig b/rust/hw/char/Kconfig new file mode 100644 index 0000000000000000000000000000000000000000..a1732a9e97fe3211547e30bc9319382e6394ed5b --- /dev/null +++ b/rust/hw/char/Kconfig @@ -0,0 +1,3 @@ +config X_PL011_RUST + bool + default y if HAVE_RUST diff --git a/rust/hw/char/meson.build b/rust/hw/char/meson.build new file mode 100644 index 0000000000000000000000000000000000000000..5716dc43ef6facdcf1cc963108347bbf4d12cf0e --- /dev/null +++ b/rust/hw/char/meson.build @@ -0,0 +1 @@ +subdir('pl011') diff --git 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0000000000000000000000000000000000000000..b089e3dded623131ee13b4af8145b84388755df7 --- /dev/null +++ b/rust/hw/char/pl011/Cargo.toml @@ -0,0 +1,26 @@ +[package] +name = "pl011" +version = "0.1.0" +edition = "2021" +authors = ["Manos Pitsidianakis "] +license = "GPL-2.0-or-later" +readme = "README.md" +homepage = "https://www.qemu.org" +description = "pl011 device model for QEMU" +repository = "https://gitlab.com/epilys/rust-for-qemu" +resolver = "2" +publish = false +keywords = [] +categories = [] + +[lib] +crate-type = ["staticlib"] + +[dependencies] +bilge = { version = "0.2.0" } +bilge-impl = { version = "0.2.0" } +qemu_api = { path = "../../../qemu-api" } +qemu_api_macros = { path = "../../../qemu-api-macros" } + +# Do not include in any global workspace +[workspace] diff --git a/rust/hw/char/pl011/README.md b/rust/hw/char/pl011/README.md new file mode 100644 index 0000000000000000000000000000000000000000..cd7dea31634241cbf96b0be13f21d52bbd8ae750 --- /dev/null +++ b/rust/hw/char/pl011/README.md @@ -0,0 +1,31 @@ +# PL011 QEMU Device Model + +This library implements a device model for the PrimeCell® UART (PL011) +device in QEMU. + +## Build static lib + +Host build target must be explicitly specified: + +```sh +cargo build --target x86_64-unknown-linux-gnu +``` + +Replace host target triplet if necessary. + +## Generate Rust documentation + +To generate docs for this crate, including private items: + +```sh +cargo doc --no-deps --document-private-items --target x86_64-unknown-linux-gnu +``` + +To include direct dependencies like `bilge` (bitmaps for register types): + +```sh +cargo tree --depth 1 -e normal --prefix none \ + | cut -d' ' -f1 \ + | xargs printf -- '-p %s\n' \ + | xargs cargo doc --no-deps --document-private-items --target x86_64-unknown-linux-gnu +``` diff --git a/rust/hw/char/pl011/meson.build b/rust/hw/char/pl011/meson.build new file mode 100644 index 0000000000000000000000000000000000000000..547cca5a96f7eef284caf1949380b65f7d015d92 --- /dev/null +++ b/rust/hw/char/pl011/meson.build @@ -0,0 +1,26 @@ +subproject('bilge-0.2-rs', required: true) +subproject('bilge-impl-0.2-rs', required: true) + +bilge_dep = dependency('bilge-0.2-rs') +bilge_impl_dep = dependency('bilge-impl-0.2-rs') + +_libpl011_rs = static_library( + 'pl011', + files('src/lib.rs'), + override_options: ['rust_std=2021', 'build.rust_std=2021'], + rust_abi: 'rust', + dependencies: [ + bilge_dep, + bilge_impl_dep, + qemu_api, + qemu_api_macros, + ], +) + +rust_devices_ss.add(when: 'CONFIG_X_PL011_RUST', if_true: [declare_dependency( + link_whole: [_libpl011_rs], + # Putting proc macro crates in `dependencies` is necessary for Meson to find + # them when compiling the root per-target static rust lib. + dependencies: [bilge_impl_dep, qemu_api_macros], + variables: {'crate': 'pl011'}, +)]) diff --git a/rust/hw/char/pl011/src/definitions.rs b/rust/hw/char/pl011/src/definitions.rs new file mode 100644 index 0000000000000000000000000000000000000000..baafe1d3908e695a895c3f8ef4cae3e390654f1f --- /dev/null +++ b/rust/hw/char/pl011/src/definitions.rs @@ -0,0 +1,20 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later + +//! Definitions required by QEMU when registering the device. + +use core::mem::MaybeUninit; + +use qemu_api::{bindings::*, definitions::ObjectImpl}; + +use crate::device::PL011State; + +pub const TYPE_PL011: &std::ffi::CStr = c"pl011"; + +#[used] +pub static VMSTATE_PL011: VMStateDescription = VMStateDescription { + name: PL011State::TYPE_INFO.name, + unmigratable: true, + ..unsafe { MaybeUninit::::zeroed().assume_init() } +}; diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs new file mode 100644 index 0000000000000000000000000000000000000000..07cf2fa4e1f3985b24a25e7cf86223bf699cf022 --- /dev/null +++ b/rust/hw/char/pl011/src/device.rs @@ -0,0 +1,594 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later + +use core::{ + ffi::{c_int, c_uchar, c_uint, c_void, CStr}, + ptr::{addr_of, addr_of_mut, NonNull}, +}; + +use qemu_api::{ + bindings::{self, *}, + definitions::ObjectImpl, +}; + +use crate::{ + memory_ops::PL011_OPS, + registers::{self, Interrupt}, + RegisterOffset, +}; + +static PL011_ID_ARM: [c_uchar; 8] = [0x11, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1]; + +const DATA_BREAK: u32 = 1 << 10; + +/// QEMU sourced constant. +pub const PL011_FIFO_DEPTH: usize = 16_usize; + +#[repr(C)] +#[derive(Debug, qemu_api_macros::Object)] +/// PL011 Device Model in QEMU +pub struct PL011State { + pub parent_obj: SysBusDevice, + pub iomem: MemoryRegion, + pub readbuff: u32, + #[doc(alias = "fr")] + pub flags: registers::Flags, + #[doc(alias = "lcr")] + pub line_control: registers::LineControl, + #[doc(alias = "rsr")] + pub receive_status_error_clear: registers::ReceiveStatusErrorClear, + #[doc(alias = "cr")] + pub control: registers::Control, + pub dmacr: u32, + pub int_enabled: u32, + pub int_level: u32, + pub read_fifo: [u32; PL011_FIFO_DEPTH], + pub ilpr: u32, + pub ibrd: u32, + pub fbrd: u32, + pub ifl: u32, + pub read_pos: usize, + pub read_count: usize, + pub read_trigger: usize, + #[doc(alias = "chr")] + pub char_backend: CharBackend, + /// QEMU interrupts + /// + /// ```text + /// * sysbus MMIO region 0: device registers + /// * sysbus IRQ 0: `UARTINTR` (combined interrupt line) + /// * sysbus IRQ 1: `UARTRXINTR` (receive FIFO interrupt line) + /// * sysbus IRQ 2: `UARTTXINTR` (transmit FIFO interrupt line) + /// * sysbus IRQ 3: `UARTRTINTR` (receive timeout interrupt line) + /// * sysbus IRQ 4: `UARTMSINTR` (momem status interrupt line) + /// * sysbus IRQ 5: `UARTEINTR` (error interrupt line) + /// ``` + #[doc(alias = "irq")] + pub interrupts: [qemu_irq; 6usize], + #[doc(alias = "clk")] + pub clock: NonNull, + #[doc(alias = "migrate_clk")] + pub migrate_clock: bool, +} + +impl ObjectImpl for PL011State { + type Class = PL011Class; + const TYPE_INFO: qemu_api::bindings::TypeInfo = qemu_api::type_info! { Self }; + const TYPE_NAME: &'static CStr = c"pl011"; + const PARENT_TYPE_NAME: Option<&'static CStr> = Some(TYPE_SYS_BUS_DEVICE); + const ABSTRACT: bool = false; + const INSTANCE_INIT: Option = Some(pl011_init); + const INSTANCE_POST_INIT: Option = None; + const INSTANCE_FINALIZE: Option = None; +} + +#[repr(C)] +pub struct PL011Class { + _inner: [u8; 0], +} + +impl qemu_api::definitions::Class for PL011Class { + const CLASS_INIT: Option< + unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut core::ffi::c_void), + > = Some(crate::device_class::pl011_class_init); + const CLASS_BASE_INIT: Option< + unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut core::ffi::c_void), + > = None; +} + +#[used] +pub static CLK_NAME: &CStr = c"clk"; + +impl PL011State { + pub fn init(&mut self) { + let dev = addr_of_mut!(*self).cast::(); + // SAFETY: + // + // self and self.iomem are guaranteed to be valid at this point since callers + // must make sure the `self` reference is valid. + unsafe { + memory_region_init_io( + addr_of_mut!(self.iomem), + addr_of_mut!(*self).cast::(), + &PL011_OPS, + addr_of_mut!(*self).cast::(), + Self::TYPE_INFO.name, + 0x1000, + ); + let sbd = addr_of_mut!(*self).cast::(); + sysbus_init_mmio(sbd, addr_of_mut!(self.iomem)); + for irq in self.interrupts.iter_mut() { + sysbus_init_irq(sbd, irq); + } + } + // SAFETY: + // + // self.clock is not initialized at this point; but since `NonNull<_>` is Copy, + // we can overwrite the undefined value without side effects. This is + // safe since all PL011State instances are created by QOM code which + // calls this function to initialize the fields; therefore no code is + // able to access an invalid self.clock value. + unsafe { + self.clock = NonNull::new(qdev_init_clock_in( + dev, + CLK_NAME.as_ptr(), + None, /* pl011_clock_update */ + addr_of_mut!(*self).cast::(), + ClockEvent_ClockUpdate, + )) + .unwrap(); + } + } + + pub fn read( + &mut self, + offset: hwaddr, + _size: core::ffi::c_uint, + ) -> std::ops::ControlFlow { + use RegisterOffset::*; + + std::ops::ControlFlow::Break(match RegisterOffset::try_from(offset) { + Err(v) if (0x3f8..0x400).contains(&v) => { + u64::from(PL011_ID_ARM[((offset - 0xfe0) >> 2) as usize]) + } + Err(_) => { + // qemu_log_mask(LOG_GUEST_ERROR, "pl011_read: Bad offset 0x%x\n", (int)offset); + 0 + } + Ok(DR) => { + // s->flags &= ~PL011_FLAG_RXFF; + self.flags.set_receive_fifo_full(false); + let c = self.read_fifo[self.read_pos]; + if self.read_count > 0 { + self.read_count -= 1; + self.read_pos = (self.read_pos + 1) & (self.fifo_depth() - 1); + } + if self.read_count == 0 { + // self.flags |= PL011_FLAG_RXFE; + self.flags.set_receive_fifo_empty(true); + } + if self.read_count + 1 == self.read_trigger { + //self.int_level &= ~ INT_RX; + self.int_level &= !registers::INT_RX; + } + // Update error bits. + self.receive_status_error_clear = c.to_be_bytes()[3].into(); + self.update(); + // Must call qemu_chr_fe_accept_input, so return Continue: + return std::ops::ControlFlow::Continue(c.into()); + } + Ok(RSR) => u8::from(self.receive_status_error_clear).into(), + Ok(FR) => u16::from(self.flags).into(), + Ok(FBRD) => self.fbrd.into(), + Ok(ILPR) => self.ilpr.into(), + Ok(IBRD) => self.ibrd.into(), + Ok(LCR_H) => u16::from(self.line_control).into(), + Ok(CR) => { + // We exercise our self-control. + u16::from(self.control).into() + } + Ok(FLS) => self.ifl.into(), + Ok(IMSC) => self.int_enabled.into(), + Ok(RIS) => self.int_level.into(), + Ok(MIS) => u64::from(self.int_level & self.int_enabled), + Ok(ICR) => { + // "The UARTICR Register is the interrupt clear register and is write-only" + // Source: ARM DDI 0183G 3.3.13 Interrupt Clear Register, UARTICR + 0 + } + Ok(DMACR) => self.dmacr.into(), + }) + } + + pub fn write(&mut self, offset: hwaddr, value: u64) { + // eprintln!("write offset {offset} value {value}"); + use RegisterOffset::*; + let value: u32 = value as u32; + match RegisterOffset::try_from(offset) { + Err(_bad_offset) => { + eprintln!("write bad offset {offset} value {value}"); + } + Ok(DR) => { + // ??? Check if transmitter is enabled. + let ch: u8 = value as u8; + // XXX this blocks entire thread. Rewrite to use + // qemu_chr_fe_write and background I/O callbacks + + // SAFETY: self.char_backend is a valid CharBackend instance after it's been + // initialized in realize(). + unsafe { + qemu_chr_fe_write_all(addr_of_mut!(self.char_backend), &ch, 1); + } + self.loopback_tx(value); + self.int_level |= registers::INT_TX; + self.update(); + } + Ok(RSR) => { + self.receive_status_error_clear = 0.into(); + } + Ok(FR) => { + // flag writes are ignored + } + Ok(ILPR) => { + self.ilpr = value; + } + Ok(IBRD) => { + self.ibrd = value; + } + Ok(FBRD) => { + self.fbrd = value; + } + Ok(LCR_H) => { + let value = value as u16; + let new_val: registers::LineControl = value.into(); + // Reset the FIFO state on FIFO enable or disable + if bool::from(self.line_control.fifos_enabled()) + ^ bool::from(new_val.fifos_enabled()) + { + self.reset_fifo(); + } + if self.line_control.send_break() ^ new_val.send_break() { + let mut break_enable: c_int = new_val.send_break().into(); + // SAFETY: self.char_backend is a valid CharBackend instance after it's been + // initialized in realize(). + unsafe { + qemu_chr_fe_ioctl( + addr_of_mut!(self.char_backend), + CHR_IOCTL_SERIAL_SET_BREAK as i32, + addr_of_mut!(break_enable).cast::(), + ); + } + self.loopback_break(break_enable > 0); + } + self.line_control = new_val; + self.set_read_trigger(); + } + Ok(CR) => { + // ??? Need to implement the enable bit. + let value = value as u16; + self.control = value.into(); + self.loopback_mdmctrl(); + } + Ok(FLS) => { + self.ifl = value; + self.set_read_trigger(); + } + Ok(IMSC) => { + self.int_enabled = value; + self.update(); + } + Ok(RIS) => {} + Ok(MIS) => {} + Ok(ICR) => { + self.int_level &= !value; + self.update(); + } + Ok(DMACR) => { + self.dmacr = value; + if value & 3 > 0 { + // qemu_log_mask(LOG_UNIMP, "pl011: DMA not implemented\n"); + eprintln!("pl011: DMA not implemented"); + } + } + } + } + + #[inline] + fn loopback_tx(&mut self, value: u32) { + if !self.loopback_enabled() { + return; + } + + // Caveat: + // + // In real hardware, TX loopback happens at the serial-bit level + // and then reassembled by the RX logics back into bytes and placed + // into the RX fifo. That is, loopback happens after TX fifo. + // + // Because the real hardware TX fifo is time-drained at the frame + // rate governed by the configured serial format, some loopback + // bytes in TX fifo may still be able to get into the RX fifo + // that could be full at times while being drained at software + // pace. + // + // In such scenario, the RX draining pace is the major factor + // deciding which loopback bytes get into the RX fifo, unless + // hardware flow-control is enabled. + // + // For simplicity, the above described is not emulated. + self.put_fifo(value); + } + + fn loopback_mdmctrl(&mut self) { + if !self.loopback_enabled() { + return; + } + + /* + * Loopback software-driven modem control outputs to modem status inputs: + * FR.RI <= CR.Out2 + * FR.DCD <= CR.Out1 + * FR.CTS <= CR.RTS + * FR.DSR <= CR.DTR + * + * The loopback happens immediately even if this call is triggered + * by setting only CR.LBE. + * + * CTS/RTS updates due to enabled hardware flow controls are not + * dealt with here. + */ + + //fr = s->flags & ~(PL011_FLAG_RI | PL011_FLAG_DCD | + // PL011_FLAG_DSR | PL011_FLAG_CTS); + //fr |= (cr & CR_OUT2) ? PL011_FLAG_RI : 0; + //fr |= (cr & CR_OUT1) ? PL011_FLAG_DCD : 0; + //fr |= (cr & CR_RTS) ? PL011_FLAG_CTS : 0; + //fr |= (cr & CR_DTR) ? PL011_FLAG_DSR : 0; + // + self.flags.set_ring_indicator(self.control.out_2()); + self.flags.set_data_carrier_detect(self.control.out_1()); + self.flags.set_clear_to_send(self.control.request_to_send()); + self.flags + .set_data_set_ready(self.control.data_transmit_ready()); + + // Change interrupts based on updated FR + let mut il = self.int_level; + + il &= !Interrupt::MS; + //il |= (fr & PL011_FLAG_DSR) ? INT_DSR : 0; + //il |= (fr & PL011_FLAG_DCD) ? INT_DCD : 0; + //il |= (fr & PL011_FLAG_CTS) ? INT_CTS : 0; + //il |= (fr & PL011_FLAG_RI) ? INT_RI : 0; + + if self.flags.data_set_ready() { + il |= Interrupt::DSR as u32; + } + if self.flags.data_carrier_detect() { + il |= Interrupt::DCD as u32; + } + if self.flags.clear_to_send() { + il |= Interrupt::CTS as u32; + } + if self.flags.ring_indicator() { + il |= Interrupt::RI as u32; + } + self.int_level = il; + self.update(); + } + + fn loopback_break(&mut self, enable: bool) { + if enable { + self.loopback_tx(DATA_BREAK); + } + } + + fn set_read_trigger(&mut self) { + //#if 0 + // /* The docs say the RX interrupt is triggered when the FIFO exceeds + // the threshold. However linux only reads the FIFO in response to an + // interrupt. Triggering the interrupt when the FIFO is non-empty seems + // to make things work. */ + // if (s->lcr & LCR_FEN) + // s->read_trigger = (s->ifl >> 1) & 0x1c; + // else + //#endif + self.read_trigger = 1; + } + + pub fn realize(&mut self) { + // SAFETY: self.char_backend has the correct size and alignment for a + // CharBackend object, and its callbacks are of the correct types. + unsafe { + qemu_chr_fe_set_handlers( + addr_of_mut!(self.char_backend), + Some(pl011_can_receive), + Some(pl011_receive), + Some(pl011_event), + None, + addr_of_mut!(*self).cast::(), + core::ptr::null_mut(), + true, + ); + } + } + + pub fn reset(&mut self) { + self.line_control.reset(); + self.receive_status_error_clear.reset(); + self.dmacr = 0; + self.int_enabled = 0; + self.int_level = 0; + self.ilpr = 0; + self.ibrd = 0; + self.fbrd = 0; + self.read_trigger = 1; + self.ifl = 0x12; + self.control.reset(); + self.flags = 0.into(); + self.reset_fifo(); + } + + pub fn reset_fifo(&mut self) { + self.read_count = 0; + self.read_pos = 0; + + /* Reset FIFO flags */ + self.flags.reset(); + } + + pub fn can_receive(&self) -> bool { + // trace_pl011_can_receive(s->lcr, s->read_count, r); + self.read_count < self.fifo_depth() + } + + pub fn event(&mut self, event: QEMUChrEvent) { + if event == bindings::QEMUChrEvent_CHR_EVENT_BREAK && !self.fifo_enabled() { + self.put_fifo(DATA_BREAK); + self.receive_status_error_clear.set_break_error(true); + } + } + + #[inline] + pub fn fifo_enabled(&self) -> bool { + matches!(self.line_control.fifos_enabled(), registers::Mode::FIFO) + } + + #[inline] + pub fn loopback_enabled(&self) -> bool { + self.control.enable_loopback() + } + + #[inline] + pub fn fifo_depth(&self) -> usize { + // Note: FIFO depth is expected to be power-of-2 + if self.fifo_enabled() { + return PL011_FIFO_DEPTH; + } + 1 + } + + pub fn put_fifo(&mut self, value: c_uint) { + let depth = self.fifo_depth(); + assert!(depth > 0); + let slot = (self.read_pos + self.read_count) & (depth - 1); + self.read_fifo[slot] = value; + self.read_count += 1; + // s->flags &= ~PL011_FLAG_RXFE; + self.flags.set_receive_fifo_empty(false); + if self.read_count == depth { + //s->flags |= PL011_FLAG_RXFF; + self.flags.set_receive_fifo_full(true); + } + + if self.read_count == self.read_trigger { + self.int_level |= registers::INT_RX; + self.update(); + } + } + + pub fn update(&mut self) { + let flags = self.int_level & self.int_enabled; + for (irq, i) in self.interrupts.iter().zip(IRQMASK) { + // SAFETY: self.interrupts have been initialized in init(). + unsafe { qemu_set_irq(*irq, i32::from(flags & i != 0)) }; + } + } +} + +/// Which bits in the interrupt status matter for each outbound IRQ line ? +pub const IRQMASK: [u32; 6] = [ + /* combined IRQ */ + Interrupt::E + | Interrupt::MS + | Interrupt::RT as u32 + | Interrupt::TX as u32 + | Interrupt::RX as u32, + Interrupt::RX as u32, + Interrupt::TX as u32, + Interrupt::RT as u32, + Interrupt::MS, + Interrupt::E, +]; + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +#[no_mangle] +pub unsafe extern "C" fn pl011_can_receive(opaque: *mut c_void) -> c_int { + assert!(!opaque.is_null()); + let state = NonNull::new_unchecked(opaque.cast::()); + state.as_ref().can_receive().into() +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +/// +/// The buffer and size arguments must also be valid. +#[no_mangle] +pub unsafe extern "C" fn pl011_receive( + opaque: *mut core::ffi::c_void, + buf: *const u8, + size: core::ffi::c_int, +) { + assert!(!opaque.is_null()); + let mut state = NonNull::new_unchecked(opaque.cast::()); + if state.as_ref().loopback_enabled() { + return; + } + if size > 0 { + assert!(!buf.is_null()); + state + .as_mut() + .put_fifo(c_uint::from(unsafe { buf.read_volatile() })) + } +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +#[no_mangle] +pub unsafe extern "C" fn pl011_event(opaque: *mut core::ffi::c_void, event: QEMUChrEvent) { + assert!(!opaque.is_null()); + let mut state = NonNull::new_unchecked(opaque.cast::()); + state.as_mut().event(event) +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer for `chr`. +#[no_mangle] +pub unsafe extern "C" fn pl011_create( + addr: u64, + irq: qemu_irq, + chr: *mut Chardev, +) -> *mut DeviceState { + let dev: *mut DeviceState = unsafe { qdev_new(PL011State::TYPE_INFO.name) }; + assert!(!dev.is_null()); + let sysbus: *mut SysBusDevice = dev as *mut SysBusDevice; + + qdev_prop_set_chr(dev, bindings::TYPE_CHARDEV.as_ptr(), chr); + sysbus_realize_and_unref(sysbus, addr_of!(error_fatal) as *mut *mut Error); + sysbus_mmio_map(sysbus, 0, addr); + sysbus_connect_irq(sysbus, 0, irq); + dev +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +#[no_mangle] +pub unsafe extern "C" fn pl011_init(obj: *mut Object) { + assert!(!obj.is_null()); + let mut state = NonNull::new_unchecked(obj.cast::()); + state.as_mut().init(); +} diff --git a/rust/hw/char/pl011/src/device_class.rs b/rust/hw/char/pl011/src/device_class.rs new file mode 100644 index 0000000000000000000000000000000000000000..631d276e72d444011ef5ef28ce169815439011d6 --- /dev/null +++ b/rust/hw/char/pl011/src/device_class.rs @@ -0,0 +1,59 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later + +use core::ptr::NonNull; + +use qemu_api::bindings::*; + +use crate::{definitions::VMSTATE_PL011, device::PL011State}; + +qemu_api::declare_properties! { + PL011_PROPERTIES, + qemu_api::define_property!( + c"chardev", + PL011State, + char_backend, + unsafe { &qdev_prop_chr }, + CharBackend + ), + qemu_api::define_property!( + c"migrate-clk", + PL011State, + migrate_clock, + unsafe { &qdev_prop_bool }, + bool + ), +} + +qemu_api::device_class_init! { + pl011_class_init, + props => PL011_PROPERTIES, + realize_fn => Some(pl011_realize), + reset_fn => Some(pl011_reset), + vmsd => VMSTATE_PL011, +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +#[no_mangle] +pub unsafe extern "C" fn pl011_realize(dev: *mut DeviceState, _errp: *mut *mut Error) { + assert!(!dev.is_null()); + let mut state = NonNull::new_unchecked(dev.cast::()); + state.as_mut().realize(); +} + +/// # Safety +/// +/// We expect the FFI user of this function to pass a valid pointer, that has +/// the same size as [`PL011State`]. We also expect the device is +/// readable/writeable from one thread at any time. +#[no_mangle] +pub unsafe extern "C" fn pl011_reset(dev: *mut DeviceState) { + assert!(!dev.is_null()); + let mut state = NonNull::new_unchecked(dev.cast::()); + state.as_mut().reset(); +} diff --git a/rust/hw/char/pl011/src/lib.rs b/rust/hw/char/pl011/src/lib.rs new file mode 100644 index 0000000000000000000000000000000000000000..54de89538a59c6f29a419279200f75d516913bad --- /dev/null +++ b/rust/hw/char/pl011/src/lib.rs @@ -0,0 +1,585 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later +// +// PL011 QEMU Device Model +// +// This library implements a device model for the PrimeCell® UART (PL011) +// device in QEMU. +// +#![doc = include_str!("../README.md")] +//! # Library crate +//! +//! See [`PL011State`](crate::device::PL011State) for the device model type and +//! the [`registers`] module for register types. + +#![deny( + rustdoc::broken_intra_doc_links, + rustdoc::redundant_explicit_links, + clippy::correctness, + clippy::suspicious, + clippy::complexity, + clippy::perf, + clippy::cargo, + clippy::nursery, + clippy::style, + // restriction group + clippy::dbg_macro, + clippy::as_underscore, + clippy::assertions_on_result_states, + // pedantic group + clippy::doc_markdown, + clippy::borrow_as_ptr, + clippy::cast_lossless, + clippy::option_if_let_else, + clippy::missing_const_for_fn, + clippy::cognitive_complexity, + clippy::missing_safety_doc, + )] + +extern crate bilge; +extern crate bilge_impl; +extern crate qemu_api; + +pub mod definitions; +pub mod device; +pub mod device_class; +pub mod memory_ops; + +/// Offset of each register from the base memory address of the device. +/// +/// # Source +/// ARM DDI 0183G, Table 3-1 p.3-3 +#[doc(alias = "offset")] +#[allow(non_camel_case_types)] +#[repr(u64)] +#[derive(Debug)] +pub enum RegisterOffset { + /// Data Register + /// + /// A write to this register initiates the actual data transmission + #[doc(alias = "UARTDR")] + DR = 0x000, + /// Receive Status Register or Error Clear Register + #[doc(alias = "UARTRSR")] + #[doc(alias = "UARTECR")] + RSR = 0x004, + /// Flag Register + /// + /// A read of this register shows if transmission is complete + #[doc(alias = "UARTFR")] + FR = 0x018, + /// Fractional Baud Rate Register + /// + /// responsible for baud rate speed + #[doc(alias = "UARTFBRD")] + FBRD = 0x028, + /// `IrDA` Low-Power Counter Register + #[doc(alias = "UARTILPR")] + ILPR = 0x020, + /// Integer Baud Rate Register + /// + /// Responsible for baud rate speed + #[doc(alias = "UARTIBRD")] + IBRD = 0x024, + /// line control register (data frame format) + #[doc(alias = "UARTLCR_H")] + LCR_H = 0x02C, + /// Toggle UART, transmission or reception + #[doc(alias = "UARTCR")] + CR = 0x030, + /// Interrupt FIFO Level Select Register + #[doc(alias = "UARTIFLS")] + FLS = 0x034, + /// Interrupt Mask Set/Clear Register + #[doc(alias = "UARTIMSC")] + IMSC = 0x038, + /// Raw Interrupt Status Register + #[doc(alias = "UARTRIS")] + RIS = 0x03C, + /// Masked Interrupt Status Register + #[doc(alias = "UARTMIS")] + MIS = 0x040, + /// Interrupt Clear Register + #[doc(alias = "UARTICR")] + ICR = 0x044, + /// DMA control Register + #[doc(alias = "UARTDMACR")] + DMACR = 0x048, + ///// Reserved, offsets `0x04C` to `0x07C`. + //Reserved = 0x04C, +} + +impl core::convert::TryFrom for RegisterOffset { + type Error = u64; + + fn try_from(value: u64) -> Result { + macro_rules! case { + ($($discriminant:ident),*$(,)*) => { + /* check that matching on all macro arguments compiles, which means we are not + * missing any enum value; if the type definition ever changes this will stop + * compiling. + */ + const fn _assert_exhaustive(val: RegisterOffset) { + match val { + $(RegisterOffset::$discriminant => (),)* + } + } + + match value { + $(x if x == Self::$discriminant as u64 => Ok(Self::$discriminant),)* + _ => Err(value), + } + } + } + case! { DR, RSR, FR, FBRD, ILPR, IBRD, LCR_H, CR, FLS, IMSC, RIS, MIS, ICR, DMACR } + } +} + +pub mod registers { + //! Device registers exposed as typed structs which are backed by arbitrary + //! integer bitmaps. [`Data`], [`Control`], [`LineControl`], etc. + //! + //! All PL011 registers are essentially 32-bit wide, but are typed here as + //! bitmaps with only the necessary width. That is, if a struct bitmap + //! in this module is for example 16 bits long, it should be conceived + //! as a 32-bit register where the unmentioned higher bits are always + //! unused thus treated as zero when read or written. + use bilge::prelude::*; + + // TODO: FIFO Mode has different semantics + /// Data Register, `UARTDR` + /// + /// The `UARTDR` register is the data register. + /// + /// For words to be transmitted: + /// + /// - if the FIFOs are enabled, data written to this location is pushed onto + /// the transmit + /// FIFO + /// - if the FIFOs are not enabled, data is stored in the transmitter + /// holding register (the + /// bottom word of the transmit FIFO). + /// + /// The write operation initiates transmission from the UART. The data is + /// prefixed with a start bit, appended with the appropriate parity bit + /// (if parity is enabled), and a stop bit. The resultant word is then + /// transmitted. + /// + /// For received words: + /// + /// - if the FIFOs are enabled, the data byte and the 4-bit status (break, + /// frame, parity, + /// and overrun) is pushed onto the 12-bit wide receive FIFO + /// - if the FIFOs are not enabled, the data byte and status are stored in + /// the receiving + /// holding register (the bottom word of the receive FIFO). + /// + /// The received data byte is read by performing reads from the `UARTDR` + /// register along with the corresponding status information. The status + /// information can also be read by a read of the `UARTRSR/UARTECR` + /// register. + /// + /// # Note + /// + /// You must disable the UART before any of the control registers are + /// reprogrammed. When the UART is disabled in the middle of + /// transmission or reception, it completes the current character before + /// stopping. + /// + /// # Source + /// ARM DDI 0183G 3.3.1 Data Register, UARTDR + #[bitsize(16)] + #[derive(Clone, Copy, DebugBits, FromBits)] + #[doc(alias = "UARTDR")] + pub struct Data { + _reserved: u4, + pub data: u8, + pub framing_error: bool, + pub parity_error: bool, + pub break_error: bool, + pub overrun_error: bool, + } + + // TODO: FIFO Mode has different semantics + /// Receive Status Register / Error Clear Register, `UARTRSR/UARTECR` + /// + /// The UARTRSR/UARTECR register is the receive status register/error clear + /// register. Receive status can also be read from the `UARTRSR` + /// register. If the status is read from this register, then the status + /// information for break, framing and parity corresponds to the + /// data character read from the [Data register](Data), `UARTDR` prior to + /// reading the UARTRSR register. The status information for overrun is + /// set immediately when an overrun condition occurs. + /// + /// + /// # Note + /// The received data character must be read first from the [Data + /// Register](Data), `UARTDR` before reading the error status associated + /// with that data character from the `UARTRSR` register. This read + /// sequence cannot be reversed, because the `UARTRSR` register is + /// updated only when a read occurs from the `UARTDR` register. However, + /// the status information can also be obtained by reading the `UARTDR` + /// register + /// + /// # Source + /// ARM DDI 0183G 3.3.2 Receive Status Register/Error Clear Register, + /// UARTRSR/UARTECR + #[bitsize(8)] + #[derive(Clone, Copy, DebugBits, FromBits)] + pub struct ReceiveStatusErrorClear { + pub framing_error: bool, + pub parity_error: bool, + pub break_error: bool, + pub overrun_error: bool, + _reserved_unpredictable: u4, + } + + impl ReceiveStatusErrorClear { + pub fn reset(&mut self) { + // All the bits are cleared to 0 on reset. + *self = 0.into(); + } + } + + impl Default for ReceiveStatusErrorClear { + fn default() -> Self { + 0.into() + } + } + + #[bitsize(16)] + #[derive(Clone, Copy, DebugBits, FromBits)] + /// Flag Register, `UARTFR` + #[doc(alias = "UARTFR")] + pub struct Flags { + /// CTS Clear to send. This bit is the complement of the UART clear to + /// send, `nUARTCTS`, modem status input. That is, the bit is 1 + /// when `nUARTCTS` is LOW. + pub clear_to_send: bool, + /// DSR Data set ready. This bit is the complement of the UART data set + /// ready, `nUARTDSR`, modem status input. That is, the bit is 1 when + /// `nUARTDSR` is LOW. + pub data_set_ready: bool, + /// DCD Data carrier detect. This bit is the complement of the UART data + /// carrier detect, `nUARTDCD`, modem status input. That is, the bit is + /// 1 when `nUARTDCD` is LOW. + pub data_carrier_detect: bool, + /// BUSY UART busy. If this bit is set to 1, the UART is busy + /// transmitting data. This bit remains set until the complete + /// byte, including all the stop bits, has been sent from the + /// shift register. This bit is set as soon as the transmit FIFO + /// becomes non-empty, regardless of whether the UART is enabled + /// or not. + pub busy: bool, + /// RXFE Receive FIFO empty. The meaning of this bit depends on the + /// state of the FEN bit in the UARTLCR_H register. If the FIFO + /// is disabled, this bit is set when the receive holding + /// register is empty. If the FIFO is enabled, the RXFE bit is + /// set when the receive FIFO is empty. + pub receive_fifo_empty: bool, + /// TXFF Transmit FIFO full. The meaning of this bit depends on the + /// state of the FEN bit in the UARTLCR_H register. If the FIFO + /// is disabled, this bit is set when the transmit holding + /// register is full. If the FIFO is enabled, the TXFF bit is + /// set when the transmit FIFO is full. + pub transmit_fifo_full: bool, + /// RXFF Receive FIFO full. The meaning of this bit depends on the state + /// of the FEN bit in the UARTLCR_H register. If the FIFO is + /// disabled, this bit is set when the receive holding register + /// is full. If the FIFO is enabled, the RXFF bit is set when + /// the receive FIFO is full. + pub receive_fifo_full: bool, + /// Transmit FIFO empty. The meaning of this bit depends on the state of + /// the FEN bit in the [Line Control register](LineControl), + /// `UARTLCR_H`. If the FIFO is disabled, this bit is set when the + /// transmit holding register is empty. If the FIFO is enabled, + /// the TXFE bit is set when the transmit FIFO is empty. This + /// bit does not indicate if there is data in the transmit shift + /// register. + pub transmit_fifo_empty: bool, + /// `RI`, is `true` when `nUARTRI` is `LOW`. + pub ring_indicator: bool, + _reserved_zero_no_modify: u7, + } + + impl Flags { + pub fn reset(&mut self) { + // After reset TXFF, RXFF, and BUSY are 0, and TXFE and RXFE are 1 + self.set_receive_fifo_full(false); + self.set_transmit_fifo_full(false); + self.set_busy(false); + self.set_receive_fifo_empty(true); + self.set_transmit_fifo_empty(true); + } + } + + impl Default for Flags { + fn default() -> Self { + let mut ret: Self = 0.into(); + ret.reset(); + ret + } + } + + #[bitsize(16)] + #[derive(Clone, Copy, DebugBits, FromBits)] + /// Line Control Register, `UARTLCR_H` + #[doc(alias = "UARTLCR_H")] + pub struct LineControl { + /// 15:8 - Reserved, do not modify, read as zero. + _reserved_zero_no_modify: u8, + /// 7 SPS Stick parity select. + /// 0 = stick parity is disabled + /// 1 = either: + /// • if the EPS bit is 0 then the parity bit is transmitted and checked + /// as a 1 • if the EPS bit is 1 then the parity bit is + /// transmitted and checked as a 0. This bit has no effect when + /// the PEN bit disables parity checking and generation. See Table 3-11 + /// on page 3-14 for the parity truth table. + pub sticky_parity: bool, + /// WLEN Word length. These bits indicate the number of data bits + /// transmitted or received in a frame as follows: b11 = 8 bits + /// b10 = 7 bits + /// b01 = 6 bits + /// b00 = 5 bits. + pub word_length: WordLength, + /// FEN Enable FIFOs: + /// 0 = FIFOs are disabled (character mode) that is, the FIFOs become + /// 1-byte-deep holding registers 1 = transmit and receive FIFO + /// buffers are enabled (FIFO mode). + pub fifos_enabled: Mode, + /// 3 STP2 Two stop bits select. If this bit is set to 1, two stop bits + /// are transmitted at the end of the frame. The receive + /// logic does not check for two stop bits being received. + pub two_stops_bits: bool, + /// EPS Even parity select. Controls the type of parity the UART uses + /// during transmission and reception: + /// - 0 = odd parity. The UART generates or checks for an odd number of + /// 1s in the data and parity bits. + /// - 1 = even parity. The UART generates or checks for an even number + /// of 1s in the data and parity bits. + /// This bit has no effect when the `PEN` bit disables parity checking + /// and generation. See Table 3-11 on page 3-14 for the parity + /// truth table. + pub parity: Parity, + /// 1 PEN Parity enable: + /// + /// - 0 = parity is disabled and no parity bit added to the data frame + /// - 1 = parity checking and generation is enabled. + /// + /// See Table 3-11 on page 3-14 for the parity truth table. + pub parity_enabled: bool, + /// BRK Send break. + /// + /// If this bit is set to `1`, a low-level is continually output on the + /// `UARTTXD` output, after completing transmission of the + /// current character. For the proper execution of the break command, + /// the software must set this bit for at least two complete + /// frames. For normal use, this bit must be cleared to `0`. + pub send_break: bool, + } + + impl LineControl { + pub fn reset(&mut self) { + // All the bits are cleared to 0 when reset. + *self = 0.into(); + } + } + + impl Default for LineControl { + fn default() -> Self { + 0.into() + } + } + + #[bitsize(1)] + #[derive(Clone, Copy, Debug, Eq, FromBits, PartialEq)] + /// `EPS` "Even parity select", field of [Line Control + /// register](LineControl). + pub enum Parity { + /// - 0 = odd parity. The UART generates or checks for an odd number of + /// 1s in the data and parity bits. + Odd = 0, + /// - 1 = even parity. The UART generates or checks for an even number + /// of 1s in the data and parity bits. + Even = 1, + } + + #[bitsize(1)] + #[derive(Clone, Copy, Debug, Eq, FromBits, PartialEq)] + /// `FEN` "Enable FIFOs" or Device mode, field of [Line Control + /// register](LineControl). + pub enum Mode { + /// 0 = FIFOs are disabled (character mode) that is, the FIFOs become + /// 1-byte-deep holding registers + Character = 0, + /// 1 = transmit and receive FIFO buffers are enabled (FIFO mode). + FIFO = 1, + } + + impl From for bool { + fn from(val: Mode) -> Self { + matches!(val, Mode::FIFO) + } + } + + #[bitsize(2)] + #[derive(Clone, Copy, Debug, Eq, FromBits, PartialEq)] + /// `WLEN` Word length, field of [Line Control register](LineControl). + /// + /// These bits indicate the number of data bits transmitted or received in a + /// frame as follows: + pub enum WordLength { + /// b11 = 8 bits + _8Bits = 0b11, + /// b10 = 7 bits + _7Bits = 0b10, + /// b01 = 6 bits + _6Bits = 0b01, + /// b00 = 5 bits. + _5Bits = 0b00, + } + + /// Control Register, `UARTCR` + /// + /// The `UARTCR` register is the control register. All the bits are cleared + /// to `0` on reset except for bits `9` and `8` that are set to `1`. + /// + /// # Source + /// ARM DDI 0183G, 3.3.8 Control Register, `UARTCR`, Table 3-12 + #[bitsize(16)] + #[doc(alias = "UARTCR")] + #[derive(Clone, Copy, DebugBits, FromBits)] + pub struct Control { + /// `UARTEN` UART enable: 0 = UART is disabled. If the UART is disabled + /// in the middle of transmission or reception, it completes the current + /// character before stopping. 1 = the UART is enabled. Data + /// transmission and reception occurs for either UART signals or SIR + /// signals depending on the setting of the SIREN bit. + pub enable_uart: bool, + /// `SIREN` `SIR` enable: 0 = IrDA SIR ENDEC is disabled. `nSIROUT` + /// remains LOW (no light pulse generated), and signal transitions on + /// SIRIN have no effect. 1 = IrDA SIR ENDEC is enabled. Data is + /// transmitted and received on nSIROUT and SIRIN. UARTTXD remains HIGH, + /// in the marking state. Signal transitions on UARTRXD or modem status + /// inputs have no effect. This bit has no effect if the UARTEN bit + /// disables the UART. + pub enable_sir: bool, + /// `SIRLP` SIR low-power IrDA mode. This bit selects the IrDA encoding + /// mode. If this bit is cleared to 0, low-level bits are transmitted as + /// an active high pulse with a width of 3/ 16th of the bit period. If + /// this bit is set to 1, low-level bits are transmitted with a pulse + /// width that is 3 times the period of the IrLPBaud16 input signal, + /// regardless of the selected bit rate. Setting this bit uses less + /// power, but might reduce transmission distances. + pub sir_lowpower_irda_mode: u1, + /// Reserved, do not modify, read as zero. + _reserved_zero_no_modify: u4, + /// `LBE` Loopback enable. If this bit is set to 1 and the SIREN bit is + /// set to 1 and the SIRTEST bit in the Test Control register, UARTTCR + /// on page 4-5 is set to 1, then the nSIROUT path is inverted, and fed + /// through to the SIRIN path. The SIRTEST bit in the test register must + /// be set to 1 to override the normal half-duplex SIR operation. This + /// must be the requirement for accessing the test registers during + /// normal operation, and SIRTEST must be cleared to 0 when loopback + /// testing is finished. This feature reduces the amount of external + /// coupling required during system test. If this bit is set to 1, and + /// the SIRTEST bit is set to 0, the UARTTXD path is fed through to the + /// UARTRXD path. In either SIR mode or UART mode, when this bit is set, + /// the modem outputs are also fed through to the modem inputs. This bit + /// is cleared to 0 on reset, to disable loopback. + pub enable_loopback: bool, + /// `TXE` Transmit enable. If this bit is set to 1, the transmit section + /// of the UART is enabled. Data transmission occurs for either UART + /// signals, or SIR signals depending on the setting of the SIREN bit. + /// When the UART is disabled in the middle of transmission, it + /// completes the current character before stopping. + pub enable_transmit: bool, + /// `RXE` Receive enable. If this bit is set to 1, the receive section + /// of the UART is enabled. Data reception occurs for either UART + /// signals or SIR signals depending on the setting of the SIREN bit. + /// When the UART is disabled in the middle of reception, it completes + /// the current character before stopping. + pub enable_receive: bool, + /// `DTR` Data transmit ready. This bit is the complement of the UART + /// data transmit ready, `nUARTDTR`, modem status output. That is, when + /// the bit is programmed to a 1 then `nUARTDTR` is LOW. + pub data_transmit_ready: bool, + /// `RTS` Request to send. This bit is the complement of the UART + /// request to send, `nUARTRTS`, modem status output. That is, when the + /// bit is programmed to a 1 then `nUARTRTS` is LOW. + pub request_to_send: bool, + /// `Out1` This bit is the complement of the UART Out1 (`nUARTOut1`) + /// modem status output. That is, when the bit is programmed to a 1 the + /// output is 0. For DTE this can be used as Data Carrier Detect (DCD). + pub out_1: bool, + /// `Out2` This bit is the complement of the UART Out2 (`nUARTOut2`) + /// modem status output. That is, when the bit is programmed to a 1, the + /// output is 0. For DTE this can be used as Ring Indicator (RI). + pub out_2: bool, + /// `RTSEn` RTS hardware flow control enable. If this bit is set to 1, + /// RTS hardware flow control is enabled. Data is only requested when + /// there is space in the receive FIFO for it to be received. + pub rts_hardware_flow_control_enable: bool, + /// `CTSEn` CTS hardware flow control enable. If this bit is set to 1, + /// CTS hardware flow control is enabled. Data is only transmitted when + /// the `nUARTCTS` signal is asserted. + pub cts_hardware_flow_control_enable: bool, + } + + impl Control { + pub fn reset(&mut self) { + *self = 0.into(); + self.set_enable_receive(true); + self.set_enable_transmit(true); + } + } + + impl Default for Control { + fn default() -> Self { + let mut ret: Self = 0.into(); + ret.reset(); + ret + } + } + + /// Interrupt status bits in UARTRIS, UARTMIS, UARTIMSC + pub const INT_OE: u32 = 1 << 10; + pub const INT_BE: u32 = 1 << 9; + pub const INT_PE: u32 = 1 << 8; + pub const INT_FE: u32 = 1 << 7; + pub const INT_RT: u32 = 1 << 6; + pub const INT_TX: u32 = 1 << 5; + pub const INT_RX: u32 = 1 << 4; + pub const INT_DSR: u32 = 1 << 3; + pub const INT_DCD: u32 = 1 << 2; + pub const INT_CTS: u32 = 1 << 1; + pub const INT_RI: u32 = 1 << 0; + pub const INT_E: u32 = INT_OE | INT_BE | INT_PE | INT_FE; + pub const INT_MS: u32 = INT_RI | INT_DSR | INT_DCD | INT_CTS; + + #[repr(u32)] + pub enum Interrupt { + OE = 1 << 10, + BE = 1 << 9, + PE = 1 << 8, + FE = 1 << 7, + RT = 1 << 6, + TX = 1 << 5, + RX = 1 << 4, + DSR = 1 << 3, + DCD = 1 << 2, + CTS = 1 << 1, + RI = 1 << 0, + } + + impl Interrupt { + pub const E: u32 = INT_OE | INT_BE | INT_PE | INT_FE; + pub const MS: u32 = INT_RI | INT_DSR | INT_DCD | INT_CTS; + } +} + +// TODO: You must disable the UART before any of the control registers are +// reprogrammed. When the UART is disabled in the middle of transmission or +// reception, it completes the current character before stopping diff --git a/rust/hw/char/pl011/src/memory_ops.rs b/rust/hw/char/pl011/src/memory_ops.rs new file mode 100644 index 0000000000000000000000000000000000000000..a2552ba58ecf2b33a07f4cced5e7c5e3c3cdfcff --- /dev/null +++ b/rust/hw/char/pl011/src/memory_ops.rs @@ -0,0 +1,57 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0-or-later + +use core::{mem::MaybeUninit, ptr::NonNull}; + +use qemu_api::bindings::*; + +use crate::device::PL011State; + +pub static PL011_OPS: MemoryRegionOps = MemoryRegionOps { + read: Some(pl011_read), + write: Some(pl011_write), + read_with_attrs: None, + write_with_attrs: None, + endianness: device_endian_DEVICE_NATIVE_ENDIAN, + valid: unsafe { MaybeUninit::::zeroed().assume_init() }, + impl_: MemoryRegionOps__bindgen_ty_2 { + min_access_size: 4, + max_access_size: 4, + ..unsafe { MaybeUninit::::zeroed().assume_init() } + }, +}; + +#[no_mangle] +unsafe extern "C" fn pl011_read( + opaque: *mut core::ffi::c_void, + addr: hwaddr, + size: core::ffi::c_uint, +) -> u64 { + assert!(!opaque.is_null()); + let mut state = NonNull::new_unchecked(opaque.cast::()); + let val = state.as_mut().read(addr, size); + match val { + std::ops::ControlFlow::Break(val) => val, + std::ops::ControlFlow::Continue(val) => { + // SAFETY: self.char_backend is a valid CharBackend instance after it's been + // initialized in realize(). + let cb_ptr = core::ptr::addr_of_mut!(state.as_mut().char_backend); + unsafe { qemu_chr_fe_accept_input(cb_ptr) }; + + val + } + } +} + +#[no_mangle] +unsafe extern "C" fn pl011_write( + opaque: *mut core::ffi::c_void, + addr: hwaddr, + data: u64, + _size: core::ffi::c_uint, +) { + assert!(!opaque.is_null()); + let mut state = NonNull::new_unchecked(opaque.cast::()); + state.as_mut().write(addr, data) +} diff --git a/rust/hw/meson.build b/rust/hw/meson.build new file mode 100644 index 0000000000000000000000000000000000000000..860196645e719624d2e2e6bc301b62b81ab2e19b --- /dev/null +++ b/rust/hw/meson.build @@ -0,0 +1 @@ +subdir('char') diff --git a/rust/meson.build b/rust/meson.build index 7a32b1b195083571931ad589965c10ddaf6383b1..def77389cddc52f5d4503840e9bdfb1207586fa2 100644 --- a/rust/meson.build +++ b/rust/meson.build @@ -1,2 +1,4 @@ subdir('qemu-api-macros') subdir('qemu-api') + +subdir('hw') diff --git a/scripts/archive-source.sh b/scripts/archive-source.sh index 65af8063e4bddc89ea4bdf05716ebc9ed108e7fb..8b06c162307ec89739775cf6b8c15f9734367dd3 100755 --- a/scripts/archive-source.sh +++ b/scripts/archive-source.sh @@ -26,7 +26,10 @@ sub_file="${sub_tdir}/submodule.tar" # independent of what the developer currently has initialized # in their checkout, because the build environment is completely # different to the host OS. -subprojects="keycodemapdb libvfio-user berkeley-softfloat-3 berkeley-testfloat-3" +subprojects="keycodemapdb libvfio-user berkeley-softfloat-3 + berkeley-testfloat-3 arbitrary-int-1.2.7 bilge-0.2.0 bilge-impl-0.2.0 + either-1.12.0 itertools-0.11.0 proc-macro2-1.0.84 proc-macro-error-1.0.4 + proc-macro-error-attr-1.0.4 quote-1.0.36 syn-2.0.66 unicode-ident-1.0.12" sub_deinit="" function cleanup() { diff --git a/scripts/make-release b/scripts/make-release index 6e0433de24dc8a37cefae6d828a2958309bbf1c1..841404274b066cc26c90656150ab01fa46cbd219 100755 --- a/scripts/make-release +++ b/scripts/make-release @@ -17,7 +17,10 @@ if [ $# -ne 2 ]; then fi # Only include wraps that are invoked with subproject() -SUBPROJECTS="libvfio-user keycodemapdb berkeley-softfloat-3 berkeley-testfloat-3" +SUBPROJECTS="libvfio-user keycodemapdb berkeley-softfloat-3 berkeley-testfloat-3 + arbitrary-int-1.2.7 bilge-0.2.0 bilge-impl-0.2.0 either-1.12.0 itertools-0.11.0 + proc-macro2-1.0.84 proc-macro-error-1.0.4 proc-macro-error-attr-1.0.4 + quote-1.0.36 syn-2.0.66 unicode-ident-1.0.12" src="$1" version="$2" diff --git a/scripts/rust/rust_root_crate.sh b/scripts/rust/rust_root_crate.sh new file mode 100755 index 0000000000000000000000000000000000000000..975bddf7f1a4c6ca7770f800bdc894cdff1f3ab1 --- /dev/null +++ b/scripts/rust/rust_root_crate.sh @@ -0,0 +1,13 @@ +#!/bin/sh + +set -eu + +cat <