From: Gregory CLEMENT <gregory.clement@bootlin•com>
To: Stefan Agner <stefan@agner•ch>, arm@kernel•org
Cc: nicolas.pitre@linaro•org, andrew@lunn•ch, mans@mansr•com,
tony@atomide•com, Stefan Agner <stefan@agner•ch>,
robh@kernel•org, f.fainelli@gmail•com, linux@armlinux•org.uk,
krzk@kernel•org, kgene@kernel•org,
bcm-kernel-feedback-list@broadcom•com,
sebastian.hesselbarth@gmail•com, jason@lakedaemon•net,
arnd@arndb•de, marc.w.gonzalez@free•fr, rjui@broadcom•com,
ssantosh@kernel•org, linux-arm-kernel@lists•infradead.org,
sbranden@broadcom•com, ard.biesheuvel@linaro•org,
Nicolas Pitre <nico@fluxnic•net>,
ndesaulniers@google•com, linux-kernel@vger•kernel.org,
robin.murphy@arm•com
Subject: Re: [PATCH v3 4/4] ARM: mvebu: prefix coprocessor operand with p
Date: Sun, 21 Apr 2019 19:22:56 +0200 [thread overview]
Message-ID: <87a7gj8e8f.fsf@FE-laptop> (raw)
In-Reply-To: <c398b2639f4267cd1aa8be445439e9b415121175.1554968922.git.stefan@agner.ch>
Hi Stefan,
> In every other instance where mrc is used the coprocessor operand
> is prefix with p (e.g. p15). Use the p prefix in this case too.
> This fixes a build issue when using LLVM's integrated assembler:
> arch/arm/mach-mvebu/coherency_ll.S:69:6: error: invalid operand for instruction
> mrc 15, 0, r3, cr0, cr0, 5
> ^
> arch/arm/mach-mvebu/pmsu_ll.S:19:6: error: invalid operand for instruction
> mrc 15, 0, r0, cr0, cr0, 5 @ get the CPU ID
> ^
>
> Signed-off-by: Stefan Agner <stefan@agner•ch>
> Acked-by: Nicolas Pitre <nico@fluxnic•net>
Applied on mvebu/arm, as well as the previous patch.
Thanks,
Gregory
> ---
> arch/arm/mach-mvebu/coherency_ll.S | 2 +-
> arch/arm/mach-mvebu/pmsu_ll.S | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-mvebu/coherency_ll.S b/arch/arm/mach-mvebu/coherency_ll.S
> index 8b2fbc8b6bc6..2d962fe48821 100644
> --- a/arch/arm/mach-mvebu/coherency_ll.S
> +++ b/arch/arm/mach-mvebu/coherency_ll.S
> @@ -66,7 +66,7 @@ ENDPROC(ll_get_coherency_base)
> * fabric registers
> */
> ENTRY(ll_get_coherency_cpumask)
> - mrc 15, 0, r3, cr0, cr0, 5
> + mrc p15, 0, r3, cr0, cr0, 5
> and r3, r3, #15
> mov r2, #(1 << 24)
> lsl r3, r2, r3
> diff --git a/arch/arm/mach-mvebu/pmsu_ll.S b/arch/arm/mach-mvebu/pmsu_ll.S
> index c1fb713e9306..7aae9a25cfeb 100644
> --- a/arch/arm/mach-mvebu/pmsu_ll.S
> +++ b/arch/arm/mach-mvebu/pmsu_ll.S
> @@ -16,7 +16,7 @@
> ENTRY(armada_38x_scu_power_up)
> mrc p15, 4, r1, c15, c0 @ get SCU base address
> orr r1, r1, #0x8 @ SCU CPU Power Status Register
> - mrc 15, 0, r0, cr0, cr0, 5 @ get the CPU ID
> + mrc p15, 0, r0, cr0, cr0, 5 @ get the CPU ID
> and r0, r0, #15
> add r1, r1, r0
> mov r0, #0x0
> --
> 2.21.0
>
--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
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next prev parent reply other threads:[~2019-04-21 17:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-11 7:54 [PATCH v3 1/4] ARM: use arch_extension directive instead of arch argument Stefan Agner
2019-04-11 7:54 ` [PATCH v3 2/4] ARM: OMAP2: drop explicit assembler architecture Stefan Agner
2019-04-24 14:11 ` Tony Lindgren
2019-04-11 7:54 ` [PATCH v3 3/4] ARM: mvebu: drop unnecessary label Stefan Agner
2019-04-11 7:54 ` [PATCH v3 4/4] ARM: mvebu: prefix coprocessor operand with p Stefan Agner
2019-04-21 17:22 ` Gregory CLEMENT [this message]
2019-04-23 20:19 ` [PATCH v3 1/4] ARM: use arch_extension directive instead of arch argument Stefan Agner
2019-04-24 14:12 ` Tony Lindgren
2019-05-16 21:48 ` Olof Johansson
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