From: Richard Henderson <richard.henderson@linaro.org>
To: "Philippe Mathieu-Daudé" <f4bug@amsat.org>, qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>,
Luc Michel <luc@lmichel.fr>, Huacai Chen <chenhuacai@kernel.org>,
Hao Wu <wuhaotsh@google.com>,
Aurelien Jarno <aurelien@aurel32.net>
Subject: Re: [RFC PATCH-for-6.1 v2 5/6] target/mips/cp0_timer: Use new clock_ns_to_ticks()
Date: Fri, 9 Apr 2021 09:42:23 -0700 [thread overview]
Message-ID: <fc8cc294-17fc-de56-f534-82a9dab61e78@linaro.org> (raw)
In-Reply-To: <20210409093623.2402750-6-f4bug@amsat.org>
On 4/9/21 2:36 AM, Philippe Mathieu-Daudé wrote:
> -static uint32_t ns_to_count(CPUMIPSState *env, uint64_t ns)
> +static uint32_t tick_to_count(MIPSCPU *cpu, uint64_t ticks)
> {
> - return ns / env->cp0_count_ns;
> + return ticks / cpu->cp0_count_rate;
> }
I'm not clear on the difference between ticks and counts, and this change looks
suspicious in terms of units. Hasn't cp0_count_rate been used to initialize
the clock in the first place? And if so, why didn't clock_ns_to_ticks do the
entire job?
r~
next prev parent reply other threads:[~2021-04-09 16:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 9:36 [RFC PATCH-for-6.1 v2 0/6] target/mips/cp0_timer: Use new clock_ns_to_ticks() Philippe Mathieu-Daudé
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 1/6] target/mips/cpu: Use clock_has_source() instead of clock_get() Philippe Mathieu-Daudé
2021-04-09 16:13 ` Richard Henderson
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 2/6] target/mips/cpu: Update CP0 clock when CPU clock is propagated Philippe Mathieu-Daudé
2021-04-09 16:13 ` Richard Henderson
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 3/6] target/mips/cp0_timer: Add ns_to_count() helper Philippe Mathieu-Daudé
2021-04-09 16:15 ` Richard Henderson
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 4/6] target/mips/cp0_timer: Add ns_substract_to_count() helper Philippe Mathieu-Daudé
2021-04-09 16:27 ` Richard Henderson
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 5/6] target/mips/cp0_timer: Use new clock_ns_to_ticks() Philippe Mathieu-Daudé
2021-04-09 16:42 ` Richard Henderson [this message]
2021-04-09 9:36 ` [RFC PATCH-for-6.1 v2 6/6] hw/mips/loongson3_virt: Raise CPU clock to 2 GHz Philippe Mathieu-Daudé
2021-04-10 2:43 ` Huacai Chen
2021-04-10 14:05 ` Philippe Mathieu-Daudé
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=fc8cc294-17fc-de56-f534-82a9dab61e78@linaro.org \
--to=richard.henderson@linaro.org \
--cc=aleksandar.rikalo@syrmia.com \
--cc=aurelien@aurel32.net \
--cc=chenhuacai@kernel.org \
--cc=f4bug@amsat.org \
--cc=luc@lmichel.fr \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=wuhaotsh@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.