From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7FCDCC4167D for ; Tue, 22 Feb 2022 14:15:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0kzKJMmNI8/ZF1xHpwOj5ItpI9psPShdBIpS10v8dYY=; b=EWks/bhKZ17HoN 330okw1Scsdnq56ba+v6B8ZoAiZZjgs29oNaOqTLn4B3GF9JOIhq4592o4FkbVYynq9HNspaeY14J rAGPl1RbI3mpOsa0KVHht8Zn2VB4Zra+cnuCBG/DRzou9Lu12/2/6F4W6aYfMtsKT1X0ysYVjThcg 3aypGcSQojwtYOl/hkDMCIR27RKAtXecXby7U2zLWen30ZqdADlFkeAWHKXFhQZ2bpsoFOcP4+Co2 R4k1AW7uPpGjLzLK5Ympc0T8kJnO17iNj8agUiMNbyHWoo38LvzGkyFp7mN2cTZz6u4C0QgbJfRU2 25YgntiUNfxFF4gA1SIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMVx9-009qhl-AX; Tue, 22 Feb 2022 14:15:43 +0000 Received: from mail-lf1-x12a.google.com ([2a00:1450:4864:20::12a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMVws-009qV1-IF for linux-snps-arc@lists.infradead.org; Tue, 22 Feb 2022 14:15:28 +0000 Received: by mail-lf1-x12a.google.com with SMTP id b9so25085889lfv.7 for ; Tue, 22 Feb 2022 06:15:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=1bfGZO3qbkT9o7Ckyj5R6TFR89uvj42RXUW0v//exS4=; b=kG+GHEaJEFS+qOt7vxpB2NhBAjeJxt8pvA79ZueRg3CkVlSLqQWi7mkJzJ/F23P5u+ PRrjr8inKKWKDmpyvBEVl+Zb0pX5ZGVtc39P0+f1r+m77wcXYR4aZyb6ejqkmynHTzLR qA2K19+QC/TbN4zlrzuKYniTertKMstTfYULxqwuTUN4QS3XZlMqfgJPYQL3/YK0u/nD np+Iy161MgSBNPKQjuN0uhIhi8XYlqQ31M5rfedWLzRmcbQF/f+BMjLcOcdmIX5xfRNP b6QbxLLpNL3jFexV3iOMfE5uJyu4jA/oF1XD2bZ+pth6uThCB5CQ9/ueNFaECxmvToUL 9asQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1bfGZO3qbkT9o7Ckyj5R6TFR89uvj42RXUW0v//exS4=; b=AIvgvyzhXMfUNH50+EWx38MBSEeoCyDdmZOs9bNC2lkWSZ8i9qIu4OlOJ6+R5zWfOh AaVIkCb1zvhkmyUUq9DdOGDwDuVtc65g3+jvMX46uXNzT0lkFsV7hjqpBKSluBp3Kc4t XKMv82EMVpIQ37ae97+N2mH7eKiUgmvpf8k8mjh6fJ2/JqumSy/2pA/toYhZbvc2tRwU LJB7E95+S6XqS9CqdRfCmHqz3912QDtc0yUhqvvdi6Titj7CEle9NhDWDxjQB+ePV2vC LY9q5Exxb+daUaACUzXOnGJ8DThoxFFolehWExdleDhWFZ7g0SybR5hiGkngiKNpX9+S W1ew== X-Gm-Message-State: AOAM530z3rLhkssgikmv36U3f3q7KcrDfV+r90qj/K6o8lHaZoxClJhQ SFCx/d1FtE6zDuHND8p3c6yXBLkEReM= X-Google-Smtp-Source: ABdhPJyYdQVKllknihFiYQQFegZ7hHJ8FDPPwzCKBKKSNTP3gFHWJ7+Z5fsm71PDXrylrw/xPm99cg== X-Received: by 2002:ac2:4e04:0:b0:442:bfb6:c832 with SMTP id e4-20020ac24e04000000b00442bfb6c832mr18366656lfr.519.1645539325050; Tue, 22 Feb 2022 06:15:25 -0800 (PST) Received: from localhost.localdomain ([5.188.167.245]) by smtp.googlemail.com with ESMTPSA id m8sm1707047ljb.131.2022.02.22.06.15.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Feb 2022 06:15:24 -0800 (PST) From: Sergey Matyukevich To: linux-snps-arc@lists.infradead.org Cc: Vineet Gupta , Vladimir Isaev , Sergey Matyukevich , Sergey Matyukevich Subject: [RFC PATCH 11/13] ARC: head: elide ZOL Date: Tue, 22 Feb 2022 17:15:04 +0300 Message-Id: <20220222141506.4003433-12-geomatsi@gmail.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220222141506.4003433-1-geomatsi@gmail.com> References: <20220222141506.4003433-1-geomatsi@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220222_061526_669895_9552B0C8 X-CRM114-Status: GOOD ( 12.08 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org From: Vineet Gupta Add entry implementation based on double load/stores if ZOL is not supported. Signed-off-by: Vineet Gupta --- arch/arc/include/asm/asm-macro-ll64-emul.h | 3 +++ arch/arc/include/asm/entry.h | 2 ++ arch/arc/kernel/head.S | 8 +++++++- arch/arc/kernel/vmlinux.lds.S | 2 +- 4 files changed, 13 insertions(+), 2 deletions(-) diff --git a/arch/arc/include/asm/asm-macro-ll64-emul.h b/arch/arc/include/asm/asm-macro-ll64-emul.h index 886320cc74ad..417c892d557e 100644 --- a/arch/arc/include/asm/asm-macro-ll64-emul.h +++ b/arch/arc/include/asm/asm-macro-ll64-emul.h @@ -15,6 +15,9 @@ .ifeqs "\d", "r6" st.ab r7, [\s, \incr / 2] .endif + .ifeqs "\d", "0" + st.ab \d, [\s, \incr / 2] + .endif .endm .macro LD64.ab d, s, incr diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h index fcdd59d77f42..1bc9f730e1e2 100644 --- a/arch/arc/include/asm/entry.h +++ b/arch/arc/include/asm/entry.h @@ -7,6 +7,8 @@ #ifndef __ASM_ARC_ENTRY_H #define __ASM_ARC_ENTRY_H +#include +#include #include /* For NR_syscalls defination */ #include #include diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S index 9152782444b5..17b5426d4ca4 100644 --- a/arch/arc/kernel/head.S +++ b/arch/arc/kernel/head.S @@ -121,13 +121,19 @@ ENTRY(stext) #endif ; Clear BSS before updating any globals - ; XXX: use ZOL here mov r5, __bss_start sub r6, __bss_stop, r5 +#ifndef CONFIG_ARC_LACKS_ZOL lsr.f lp_count, r6, 2 lpnz 1f st.ab 0, [r5, 4] 1: +#else + lsr r6, r6, 3 +1: + ST64.ab 0, r5, 8 + DBNZR r6, 1b +#endif ; Uboot - kernel ABI ; r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2 diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S index 529ae50f9fe2..00aeb89bd169 100644 --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -107,7 +107,7 @@ SECTIONS _edata = .; - BSS_SECTION(4, 4, 4) + BSS_SECTION(8, 8, 8) #ifdef CONFIG_ARC_DW2_UNWIND . = ALIGN(PAGE_SIZE); -- 2.25.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc