From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 04 Mar 2026 10:02:46 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vxi7x-007vbQ-1v for lore@lore.pengutronix.de; Wed, 04 Mar 2026 10:02:46 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vxi7x-0001sn-SC for lore@pengutronix.de; Wed, 04 Mar 2026 10:02:46 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; 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Wed, 04 Mar 2026 10:02:06 +0100 Message-ID: <359a193e-3087-453b-8628-155cd7d0219c@pengutronix.de> Date: Wed, 4 Mar 2026 10:02:06 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Sascha Hauer , BAREBOX Cc: "Claude Opus 4.6" References: <20260304-arm-setup-c-v2-0-d26af520ab03@pengutronix.de> <20260304-arm-setup-c-v2-1-d26af520ab03@pengutronix.de> Content-Language: en-US, de-DE, de-BE From: Ahmad Fatoum In-Reply-To: <20260304-arm-setup-c-v2-1-d26af520ab03@pengutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260304_010209_820380_B8CA89D4 X-CRM114-Status: GOOD ( 19.63 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH v2 1/2] ARM: setupc_32: remove relocation code from setup_c X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On 3/4/26 8:53 AM, Sascha Hauer wrote: > All callers of setup_c() already call relocate_to_current_adr() or > relocate_to_adr() before setup_c(), so the relocation (memcpy) code > in setup_c is dead and also the sync_caches_for_execution() is unnecessary > Remove it and reduce setup_c to just clearing BSS. > > Co-Authored-By: Claude Opus 4.6 > Signed-off-by: Sascha Hauer Reviewed-by: Ahmad Fatoum > --- > arch/arm/cpu/setupc_32.S | 27 +++++---------------------- > 1 file changed, 5 insertions(+), 22 deletions(-) > > diff --git a/arch/arm/cpu/setupc_32.S b/arch/arm/cpu/setupc_32.S > index 0134637f62..c2c3f97528 100644 > --- a/arch/arm/cpu/setupc_32.S > +++ b/arch/arm/cpu/setupc_32.S > @@ -7,33 +7,16 @@ > .section .text.setupc > > /* > - * setup_c: copy binary to link address, clear bss and > - * continue executing at new address. > - * > - * This function does not return to the address it is > - * called from, but to the same location in the copied > - * binary. > + * setup_c: clear bss > */ > ENTRY(setup_c) > - push {r4, r5} > - mov r5, lr > - bl get_runtime_offset > - subs r4, r0, #0 > - beq 1f /* skip memcpy if already at correct address */ > - ldr r0,=_text > - ldr r2,=__bss_start > - sub r2, r2, r0 > - add r1, r0, r4 > - bl __memcpy /* memcpy(_text, _text + offset, __bss_start - _text) */ > -1: ldr r0, =__bss_start > + mov r4, lr > + ldr r0, =__bss_start > mov r1, #0 > ldr r2, =__bss_stop > sub r2, r2, r0 > - bl __memset /* clear bss */ > - bl sync_caches_for_execution > - sub lr, r5, r4 /* adjust return address to new location */ > - pop {r4, r5} > - ret lr > + bl __memset /* clear bss */ > + ret r4 > ENDPROC(setup_c) > > /* > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |