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([2409:40f4:2018:65c1:1184:2614:d863:8ed2]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-739d97ee7absm9084572b3a.58.2025.04.07.11.13.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Apr 2025 11:13:45 -0700 (PDT) From: Rakesh Jeyasingh To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, rakeshjb010@gmail.com Subject: [PATCH 1/2] rust/hw/char/pl011: Extract extract DR read logic into separate function Date: Mon, 7 Apr 2025 23:43:26 +0530 Message-ID: <20250407181327.171563-2-rakeshjb010@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250407181327.171563-1-rakeshjb010@gmail.com> References: <20250407181327.171563-1-rakeshjb010@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42d; envelope-from=rakeshjb010@gmail.com; helo=mail-pf1-x42d.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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 - Split `read()` DR case into `read_data_register()` Signed-off-by: Rakesh Jeyasingh --- rust/hw/char/pl011/src/device.rs | 39 ++++++++++++++++---------------- 1 file changed, 20 insertions(+), 19 deletions(-) diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs index bf88e0b00a..87153cdae1 100644 --- a/rust/hw/char/pl011/src/device.rs +++ b/rust/hw/char/pl011/src/device.rs @@ -190,25 +190,7 @@ pub(self) fn read(&mut self, offset: RegisterOffset) -> (bool, u32) { let mut update = false; let result = match offset { - DR => { - 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.set_receive_fifo_empty(true); - } - if self.read_count + 1 == self.read_trigger { - self.int_level &= !Interrupt::RX.0; - } - // Update error bits. - self.receive_status_error_clear.set_from_data(c); - // Must call qemu_chr_fe_accept_input - update = true; - u32::from(c) - } + DR => self.read_data_register(&mut update), RSR => u32::from(self.receive_status_error_clear), FR => u32::from(self.flags), FBRD => self.fbrd, @@ -306,6 +288,25 @@ pub(self) fn write( false } + fn read_data_register(&mut self, update: &mut bool) -> u32 { + 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.set_receive_fifo_empty(true); + } + if self.read_count + 1 == self.read_trigger { + self.int_level &= !Interrupt::RX.0; + } + self.receive_status_error_clear.set_from_data(c); + *update = true; + u32::from(c) + } + #[inline] #[must_use] fn loopback_tx(&mut self, value: registers::Data) -> bool {