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Thu, 27 Feb 2025 08:45:49 -0800 (PST) X-Google-Smtp-Source: AGHT+IFiUSLoz/5h/sVOIyTG4cZUIUWywZC+7Ocvaw54WV8v2wYGoZqmW6mmP7rrKNmMD+kPyYuPCQ== X-Received: by 2002:a17:906:da88:b0:abe:fed3:9eb8 with SMTP id a640c23a62f3a-abf2687fe85mr10580166b.41.1740674748602; Thu, 27 Feb 2025 08:45:48 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: qemu-rust@nongnu.org Subject: [PATCH 5/5] rust: pl011: pass around registers::Data Date: Thu, 27 Feb 2025 17:45:34 +0100 Message-ID: <20250227164538.814576-6-pbonzini@redhat.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250227164538.814576-1-pbonzini@redhat.com> References: <20250227164538.814576-1-pbonzini@redhat.com> 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: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.438, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1740674902735019100 Content-Type: text/plain; charset="utf-8" The values stored in the Fifo are instances of the bitfield-struct registers::Data. Convert as soon as possible the value written into DR, and always refer to the bitfield struct; it's generally cleaner other than PL011State::receive having to do a double conversion u8=3D>u32=3D>registers::Data. Signed-off-by: Paolo Bonzini --- rust/hw/char/pl011/src/device.rs | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/devi= ce.rs index 2283bae71eb..a679f6295f5 100644 --- a/rust/hw/char/pl011/src/device.rs +++ b/rust/hw/char/pl011/src/device.rs @@ -237,7 +237,7 @@ pub(self) fn write( match offset { DR =3D> { // interrupts always checked - let _ =3D self.loopback_tx(value); + let _ =3D self.loopback_tx(value.into()); self.int_level |=3D Interrupt::TX.0; return true; } @@ -304,7 +304,7 @@ pub(self) fn write( =20 #[inline] #[must_use] - fn loopback_tx(&mut self, value: u32) -> bool { + fn loopback_tx(&mut self, value: registers::Data) -> bool { // Caveat: // // In real hardware, TX loopback happens at the serial-bit level @@ -373,7 +373,7 @@ fn loopback_mdmctrl(&mut self) -> bool { } =20 fn loopback_break(&mut self, enable: bool) -> bool { - enable && self.loopback_tx(registers::Data::BREAK.into()) + enable && self.loopback_tx(registers::Data::BREAK) } =20 fn set_read_trigger(&mut self) { @@ -432,11 +432,11 @@ pub fn fifo_depth(&self) -> u32 { } =20 #[must_use] - pub fn put_fifo(&mut self, value: u32) -> bool { + pub fn put_fifo(&mut self, value: registers::Data) -> bool { let depth =3D self.fifo_depth(); assert!(depth > 0); let slot =3D (self.read_pos + self.read_count) & (depth - 1); - self.read_fifo[slot] =3D registers::Data::from(value); + self.read_fifo[slot] =3D value; self.read_count +=3D 1; self.flags.set_receive_fifo_empty(false); if self.read_count =3D=3D depth { @@ -581,7 +581,8 @@ fn receive(&self, buf: &[u8]) { return; } let mut regs =3D self.regs.borrow_mut(); - let update_irq =3D !regs.loopback_enabled() && regs.put_fifo(buf[0= ].into()); + let c: u32 =3D buf[0].into(); + let update_irq =3D !regs.loopback_enabled() && regs.put_fifo(c.int= o()); // Release the BqlRefCell before calling self.update() drop(regs); =20 @@ -594,7 +595,7 @@ fn event(&self, event: Event) { let mut update_irq =3D false; let mut regs =3D self.regs.borrow_mut(); if event =3D=3D Event::CHR_EVENT_BREAK && !regs.loopback_enabled()= { - update_irq =3D regs.put_fifo(registers::Data::BREAK.into()); + update_irq =3D regs.put_fifo(registers::Data::BREAK); } // Release the BqlRefCell before calling self.update() drop(regs); --=20 2.48.1