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Date: Thu, 21 Dec 2023 15:38:20 +0100
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Gregory CLEMENT <gregory.clement@bootlin.com>
Cc: Paul Burton <paulburton@kernel.org>, linux-mips@vger.kernel.org,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>,
	Tawfik Bayouk <tawfik.bayouk@mobileye.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	=?iso-8859-1?Q?Th=E9o?= Lebrun <theo.lebrun@bootlin.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Philippe =?iso-8859-1?Q?Mathieu-Daud=E9?= <philmd@linaro.org>,
	Florian Fainelli <florian.fainelli@broadcom.com>
Subject: Re: [PATCH v5 01/22] MIPS: compressed: Use correct instruction for
 64 bit code
Message-ID: <ZYRN3FMH4od3QX+i@alpha.franken.de>
References: <20231212163459.1923041-1-gregory.clement@bootlin.com>
 <20231212163459.1923041-2-gregory.clement@bootlin.com>
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In-Reply-To: <20231212163459.1923041-2-gregory.clement@bootlin.com>

On Tue, Dec 12, 2023 at 05:34:33PM +0100, Gregory CLEMENT wrote:
> The code clearing BSS already use macro or use correct instruction
> depending if the CPU is 32 bits or 64 bits. However, a few
> instructions remained 32 bits only.
> 
> By using the accurate MACRO, it is now possible to deal with memory
> address beyond 32 bits. As a side effect, when using 64bits processor,
> it also divides the loop number needed to clear the BSS by 2.
> 
> Reviewed-by: Philippe Mathieu-Daud? <philmd@linaro.org>
> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
> Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
> ---
>  arch/mips/boot/compressed/head.S | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/mips/boot/compressed/head.S b/arch/mips/boot/compressed/head.S
> index 5795d0af1e1b2..d237a834b85ee 100644
> --- a/arch/mips/boot/compressed/head.S
> +++ b/arch/mips/boot/compressed/head.S
> @@ -25,8 +25,8 @@
>  	/* Clear BSS */
>  	PTR_LA	a0, _edata
>  	PTR_LA	a2, _end
> -1:	sw	zero, 0(a0)
> -	addiu	a0, a0, 4
> +1:	PTR_S	zero, 0(a0)
> +	PTR_ADDIU a0, a0, PTRSIZE
>  	bne	a2, a0, 1b
>  
>  	PTR_LA	a0, (.heap)	     /* heap address */
> -- 
> 2.42.0

applied to mips-next.

Thomas.

-- 
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