From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: "Stephen Boyd" <sboyd@codeaurora.org>,
"Nicolas Pitre" <nicolas.pitre@linaro.org>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Måns Rullgård" <mans@mansr.com>,
"Russell King - ARM Linux" <linux@arm.linux.org.uk>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"Daniel Lezcano" <daniel.lezcano@linaro.org>,
"lkml - Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Christopher Covington" <cov@codeaurora.org>,
"Thomas Petazzoni" <thomas.petazzoni@free-electrons.com>
Subject: Re: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions
Date: Wed, 25 Nov 2015 08:21:31 +0100 [thread overview]
Message-ID: <24402293.zXE5ex9jKn@wuerfel> (raw)
In-Reply-To: <20151125015137.GA11298@codeaurora.org>
On Tuesday 24 November 2015 17:51:37 Stephen Boyd wrote:
> On 11/24, Arnd Bergmann wrote:
> > On Monday 23 November 2015 15:13:52 Stephen Boyd wrote:
> > IOW, anything with CPU implementer 0x56 part 0x581 should use those,
> > while part 0x584 can use the sdiv/udiv that it reports correctly.
> >
>
> It looks like we have some sort of function that mostly does
> this, except it doesn't differentiate on that lower bit for 1 vs
> 4. I guess I'll write another one for that.
>
> static inline int cpu_is_pj4(void)
> {
> unsigned int id;
>
> id = read_cpuid_id();
> if ((id & 0xff0fff00) == 0x560f5800)
> return 1;
>
> return 0;
> }
Correct, thanks.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions
Date: Wed, 25 Nov 2015 08:21:31 +0100 [thread overview]
Message-ID: <24402293.zXE5ex9jKn@wuerfel> (raw)
In-Reply-To: <20151125015137.GA11298@codeaurora.org>
On Tuesday 24 November 2015 17:51:37 Stephen Boyd wrote:
> On 11/24, Arnd Bergmann wrote:
> > On Monday 23 November 2015 15:13:52 Stephen Boyd wrote:
> > IOW, anything with CPU implementer 0x56 part 0x581 should use those,
> > while part 0x584 can use the sdiv/udiv that it reports correctly.
> >
>
> It looks like we have some sort of function that mostly does
> this, except it doesn't differentiate on that lower bit for 1 vs
> 4. I guess I'll write another one for that.
>
> static inline int cpu_is_pj4(void)
> {
> unsigned int id;
>
> id = read_cpuid_id();
> if ((id & 0xff0fff00) == 0x560f5800)
> return 1;
>
> return 0;
> }
Correct, thanks.
Arnd
next prev parent reply other threads:[~2015-11-25 7:21 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-21 1:23 [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 1/3] scripts: Allow recordmcount to be used without tracing enabled Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 2/3] recordmcount: Record locations of __aeabi_{u}idiv() calls on ARM Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 10:13 ` Russell King - ARM Linux
2015-11-21 10:13 ` Russell King - ARM Linux
2015-11-23 20:53 ` Stephen Boyd
2015-11-23 20:53 ` Stephen Boyd
2015-11-23 20:58 ` Steven Rostedt
2015-11-23 20:58 ` Steven Rostedt
2015-11-23 21:03 ` Russell King - ARM Linux
2015-11-23 21:03 ` Russell King - ARM Linux
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:33 ` Russell King - ARM Linux
2015-11-23 21:33 ` Russell King - ARM Linux
2015-11-24 1:04 ` Stephen Boyd
2015-11-24 1:04 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 3/3] ARM: Replace calls to __aeabi_{u}idiv with udiv/sdiv instructions Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 11:50 ` Måns Rullgård
2015-11-21 11:50 ` Måns Rullgård
2015-11-23 20:49 ` Stephen Boyd
2015-11-23 20:49 ` Stephen Boyd
2015-11-23 20:54 ` Måns Rullgård
2015-11-23 20:54 ` Måns Rullgård
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:16 ` Stephen Boyd
2015-11-21 20:39 ` [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions Arnd Bergmann
2015-11-21 20:39 ` Arnd Bergmann
2015-11-21 20:45 ` Måns Rullgård
2015-11-21 20:45 ` Måns Rullgård
2015-11-21 21:00 ` Arnd Bergmann
2015-11-21 21:00 ` Arnd Bergmann
2015-11-21 22:11 ` Måns Rullgård
2015-11-21 22:11 ` Måns Rullgård
2015-11-21 23:14 ` Arnd Bergmann
2015-11-21 23:14 ` Arnd Bergmann
2015-11-21 23:21 ` Arnd Bergmann
2015-11-21 23:21 ` Arnd Bergmann
2015-11-22 13:29 ` Peter Maydell
2015-11-22 13:29 ` Peter Maydell
2015-11-22 19:25 ` Arnd Bergmann
2015-11-22 19:25 ` Arnd Bergmann
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:47 ` Russell King - ARM Linux
2015-11-22 19:47 ` Russell King - ARM Linux
2015-11-22 19:58 ` Arnd Bergmann
2015-11-22 19:58 ` Arnd Bergmann
2015-11-22 20:03 ` Russell King - ARM Linux
2015-11-22 20:03 ` Russell King - ARM Linux
2015-11-22 20:37 ` Arnd Bergmann
2015-11-22 20:37 ` Arnd Bergmann
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 21:18 ` Arnd Bergmann
2015-11-22 21:18 ` Arnd Bergmann
2015-11-23 2:36 ` Nicolas Pitre
2015-11-23 2:36 ` Nicolas Pitre
2015-11-23 8:15 ` Arnd Bergmann
2015-11-23 8:15 ` Arnd Bergmann
2015-11-23 14:14 ` Christopher Covington
2015-11-23 14:14 ` Christopher Covington
2015-11-23 15:32 ` Arnd Bergmann
2015-11-23 15:32 ` Arnd Bergmann
2015-11-23 20:38 ` Stephen Boyd
2015-11-23 20:38 ` Stephen Boyd
2015-11-23 21:19 ` Arnd Bergmann
2015-11-23 21:19 ` Arnd Bergmann
2015-11-23 21:32 ` Stephen Boyd
2015-11-23 21:32 ` Stephen Boyd
2015-11-23 21:57 ` Arnd Bergmann
2015-11-23 21:57 ` Arnd Bergmann
2015-11-23 23:13 ` Stephen Boyd
2015-11-23 23:13 ` Stephen Boyd
2015-11-24 10:17 ` Arnd Bergmann
2015-11-24 10:17 ` Arnd Bergmann
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 13:45 ` Arnd Bergmann
2015-11-24 13:45 ` Arnd Bergmann
2015-11-25 1:51 ` Stephen Boyd
2015-11-25 1:51 ` Stephen Boyd
2015-11-25 7:21 ` Arnd Bergmann [this message]
2015-11-25 7:21 ` Arnd Bergmann
2015-11-24 0:13 ` Stephen Boyd
2015-11-24 0:13 ` Stephen Boyd
2015-11-24 8:53 ` Stephen Boyd
2015-11-24 8:53 ` Stephen Boyd
2015-11-24 10:38 ` Arnd Bergmann
2015-11-24 10:38 ` Arnd Bergmann
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:23 ` Russell King - ARM Linux
2015-11-24 12:23 ` Russell King - ARM Linux
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 14:00 ` Russell King - ARM Linux
2015-11-24 14:00 ` Russell King - ARM Linux
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 10:39 ` Russell King - ARM Linux
2015-11-24 10:39 ` Russell King - ARM Linux
2015-11-24 20:07 ` Stephen Boyd
2015-11-24 20:07 ` Stephen Boyd
2015-11-24 20:35 ` Russell King - ARM Linux
2015-11-24 20:35 ` Russell King - ARM Linux
2015-11-24 21:11 ` Arnd Bergmann
2015-11-24 21:11 ` Arnd Bergmann
2016-01-13 1:51 ` Stephen Boyd
2016-01-13 1:51 ` Stephen Boyd
2015-11-24 10:37 ` Russell King - ARM Linux
2015-11-24 10:37 ` Russell King - ARM Linux
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