From: u.kleine-koenig@pengutronix.de (Uwe Kleine-König)
To: linux-arm-kernel@lists.infradead.org
Subject: Problem with 64-bit registers on i.MX53
Date: Tue, 9 Oct 2012 11:02:37 +0200 [thread overview]
Message-ID: <20121009090237.GI18531@pengutronix.de> (raw)
In-Reply-To: <20121008171011.GA4625@n2100.arm.linux.org.uk>
Hello,
On Mon, Oct 08, 2012 at 06:10:11PM +0100, Russell King - ARM Linux wrote:
> On Mon, Oct 08, 2012 at 06:01:24PM +0100, Russell King - ARM Linux wrote:
> > On Mon, Oct 08, 2012 at 06:08:41PM +0200, Michael Olbrich wrote:
> You may also like to try the patch below... it will probably fix your
> problem.
>
> diff --git a/arch/arm/include/asm/vfpmacros.h b/arch/arm/include/asm/vfpmacros.h
> index a7aadbd..6a6f1e4 100644
> --- a/arch/arm/include/asm/vfpmacros.h
> +++ b/arch/arm/include/asm/vfpmacros.h
> @@ -28,7 +28,7 @@
> ldr \tmp, =elf_hwcap @ may not have MVFR regs
> ldr \tmp, [\tmp, #0]
> tst \tmp, #HWCAP_VFPv3D16
> - ldceq p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31}
> + ldceql p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31}
> addne \base, \base, #32*4 @ step over unused register space
> #else
> VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
> @@ -52,7 +52,7 @@
> ldr \tmp, =elf_hwcap @ may not have MVFR regs
> ldr \tmp, [\tmp, #0]
> tst \tmp, #HWCAP_VFPv3D16
> - stceq p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31}
> + stceql p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31}
According to the ARMARM for v7-A and v7-R (ARM DDI 0406B errata 2010 Q2)
the syntax is "STC{L}<c> ...", with a note "The pre-UAL syntax STC<c>L
is equivalent to STCL<c>.". Maybe the UAL-syntax should better be used?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2012-10-09 9:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-08 16:08 Problem with 64-bit registers on i.MX53 Michael Olbrich
2012-10-08 17:01 ` Russell King - ARM Linux
2012-10-08 17:10 ` Russell King - ARM Linux
2012-10-08 17:50 ` Dave Martin
2012-10-08 18:03 ` Russell King - ARM Linux
2012-10-08 18:04 ` Dave Martin
2012-10-09 9:02 ` Michael Olbrich
2012-10-09 8:52 ` Michael Olbrich
2012-10-09 9:02 ` Uwe Kleine-König [this message]
2012-10-09 14:05 ` Dave Martin
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