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[83.57.172.194]) by smtp.gmail.com with ESMTPSA id g5sm85018363wro.60.2021.01.03.12.52.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jan 2021 12:52:09 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PULL 22/35] clock: Define and use new clock_display_freq() Date: Sun, 3 Jan 2021 21:50:08 +0100 Message-Id: <20210103205021.2837760-23-f4bug@amsat.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210103205021.2837760-1-f4bug@amsat.org> References: <20210103205021.2837760-1-f4bug@amsat.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32f; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wm1-x32f.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.248, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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 , Luc Michel , Huacai Chen , Richard Henderson , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Aurelien Jarno Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Peter Maydell It's common to want to print a human-readable indication of a clock's frequency. Provide a utility function in the clock API to return a string which is a displayable representation of the frequency, and use it in qdev-monitor.c. Before: (qemu) info qtree [...] dev: xilinx,zynq_slcr, id "" clock-in "ps_clk" freq_hz=3.333333e+07 mmio 00000000f8000000/0000000000001000 After: dev: xilinx,zynq_slcr, id "" clock-in "ps_clk" freq_hz=33.3 MHz mmio 00000000f8000000/0000000000001000 Signed-off-by: Peter Maydell Tested-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Reviewed-by: Luc Michel Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20201215150929.30311-5-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé --- docs/devel/clocks.rst | 5 +++++ include/hw/clock.h | 12 ++++++++++++ hw/core/clock.c | 6 ++++++ softmmu/qdev-monitor.c | 6 +++--- 4 files changed, 26 insertions(+), 3 deletions(-) -- 2.26.2 diff --git a/docs/devel/clocks.rst b/docs/devel/clocks.rst index 2d317ff32f2..2548d842322 100644 --- a/docs/devel/clocks.rst +++ b/docs/devel/clocks.rst @@ -267,6 +267,11 @@ Here is an example: clock_get(dev->my_clk_input)); } +If you are only interested in the frequency for displaying it to +humans (for instance in debugging), use ``clock_display_freq()``, +which returns a prettified string-representation, e.g. "33.3 MHz". +The caller must free the string with g_free() after use. + Calculating expiry deadlines ---------------------------- diff --git a/include/hw/clock.h b/include/hw/clock.h index 852c636961e..6382f346569 100644 --- a/include/hw/clock.h +++ b/include/hw/clock.h @@ -264,4 +264,16 @@ static inline bool clock_is_enabled(const Clock *clk) return clock_get(clk) != 0; } +/** + * clock_display_freq: return human-readable representation of clock frequency + * @clk: clock + * + * Return a string which has a human-readable representation of the + * clock's frequency, e.g. "33.3 MHz". This is intended for debug + * and display purposes. + * + * The caller is responsible for freeing the string with g_free(). + */ +char *clock_display_freq(Clock *clk); + #endif /* QEMU_HW_CLOCK_H */ diff --git a/hw/core/clock.c b/hw/core/clock.c index 8c6af223e7c..76b5f468b6e 100644 --- a/hw/core/clock.c +++ b/hw/core/clock.c @@ -12,6 +12,7 @@ */ #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "hw/clock.h" #include "trace.h" @@ -111,6 +112,11 @@ static void clock_disconnect(Clock *clk) QLIST_REMOVE(clk, sibling); } +char *clock_display_freq(Clock *clk) +{ + return freq_to_str(clock_get_hz(clk)); +} + static void clock_initfn(Object *obj) { Clock *clk = CLOCK(obj); diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c index 2c57e36c9ae..8dc656becca 100644 --- a/softmmu/qdev-monitor.c +++ b/softmmu/qdev-monitor.c @@ -736,11 +736,11 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent) } } QLIST_FOREACH(ncl, &dev->clocks, node) { - qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n", + g_autofree char *freq_str = clock_display_freq(ncl->clock); + qdev_printf("clock-%s%s \"%s\" freq_hz=%s\n", ncl->output ? "out" : "in", ncl->alias ? " (alias)" : "", - ncl->name, - CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock))); + ncl->name, freq_str); } class = object_get_class(OBJECT(dev)); do {