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Thu, 09 Nov 2023 11:28:40 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Gavin Shan , Paolo Bonzini , Mark Cave-Ayland , Peter Maydell , Evgeny Iakovlev , qemu-arm@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH-for-8.2 v4 04/10] hw/char/pl011: Extract pl011_write_txdata() from pl011_write() Date: Thu, 9 Nov 2023 20:28:08 +0100 Message-ID: <20231109192814.95977-5-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231109192814.95977-1-philmd@linaro.org> References: <20231109192814.95977-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2a00:1450:4864:20::536; envelope-from=philmd@linaro.org; helo=mail-ed1-x536.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=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 @linaro.org) X-ZM-MESSAGEID: 1699558236687100001 When implementing FIFO, this code will become more complex. Start by factoring it out to a new pl011_write_txdata() function. No functional change intended. Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Alex Benn=C3=A9e --- hw/char/pl011.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/hw/char/pl011.c b/hw/char/pl011.c index 1f07c7b021..1cb9015ea2 100644 --- a/hw/char/pl011.c +++ b/hw/char/pl011.c @@ -149,6 +149,17 @@ static inline void pl011_reset_tx_fifo(PL011State *s) s->flags |=3D PL011_FLAG_TXFE; } =20 +static void pl011_write_txdata(PL011State *s, uint8_t data) +{ + /* ??? Check if transmitter is enabled. */ + + /* XXX this blocks entire thread. Rewrite to use + * qemu_chr_fe_write and background I/O callbacks */ + qemu_chr_fe_write_all(&s->chr, &data, 1); + s->int_level |=3D INT_TX; + pl011_update(s); +} + static uint64_t pl011_read(void *opaque, hwaddr offset, unsigned size) { @@ -262,19 +273,13 @@ static void pl011_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { PL011State *s =3D (PL011State *)opaque; - unsigned char ch; =20 trace_pl011_write(offset, value, pl011_regname(offset)); =20 switch (offset >> 2) { case 0: /* UARTDR */ - /* ??? Check if transmitter is enabled. */ - ch =3D value; - /* XXX this blocks entire thread. Rewrite to use - * qemu_chr_fe_write and background I/O callbacks */ - qemu_chr_fe_write_all(&s->chr, &ch, 1); - s->int_level |=3D INT_TX; - pl011_update(s); + s->readbuff =3D value; + pl011_write_txdata(s, value); break; case 1: /* UARTRSR/UARTECR */ s->rsr =3D 0; --=20 2.41.0