From patchwork Mon Jun 10 19:32:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 166369 Delivered-To: patch@linaro.org Received: by 2002:a92:4782:0:0:0:0:0 with SMTP id e2csp1410385ilk; Mon, 10 Jun 2019 12:33:56 -0700 (PDT) X-Google-Smtp-Source: APXvYqyDVR/8DQNkiHiHpgTH5dugIFW+1E2gKohRMOVNwx6+yCKkQda4Ns3Mod8kK8zfFY0/+WC9 X-Received: by 2002:a6b:b7d5:: with SMTP id h204mr10020272iof.188.1560195236764; Mon, 10 Jun 2019 12:33:56 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560195236; cv=none; d=google.com; s=arc-20160816; b=rrSIAOLY9+W6vaTCAl8vIX1DqHxEzwhVtIqdkz7P9aGsYDOtD77b3eVa1qh7jfdTmj j1y6/oMgzlcB6uy4+VkYJ7dhmWy6EkW46XzMUdDLEEFaxOH1lr10LwkQupH4EEzduaTY C5zyQbIDk75wwwwI39v4DiGRDjRSSFZuvB/KNtHWr0H2NXC0+Jh4mb0+FFhnDlk8zvY5 DYdRJJb0oCGPW1D868E1IXy0vsV9hFaqNlKepONFga12nKixahN6L2sUDNiJpFVTanME XbMMw8r3kz/DLmxKW5cIvnOXEHReGmsJ0WAToVf8/6y3TgKUxOu6MyZx5WIC4DpfzaS9 iIyw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:mime-version:cc :list-subscribe:list-help:list-post:list-unsubscribe:list-id :precedence:subject:references:in-reply-to:message-id:date:to:from; bh=gPZaE2P7XLaWHYaYxb+lbT4GWbyyaJ6XmLNaH0tlIIg=; b=gyZa4lWSv+bDCq+epOWY03YDi/2KwpJ/bvJZekKxkJSjoQ8RgnYKgs448wPiOcK5Il N7rOSH47w+t5gxoi8Xa6FnGj6BBUt/VixSRl0WRMHQ9JR4hCXPey5oz/AUbk7SCM3+KE FA3VD7EQg/RtvaJsvOvlOM3VaniK1K8ly7dCtZyXIcWWAWqQQL1uh0e0sZrPYV6V3P/K NjzL63i9qMM7oOmLrvdiB818EU3BauxZSFql/suNT+7I6+p9v3zRtylTNB8izY9VwYXA 9/bPzNPZm0MVEzUc1E8I2XSkac3yvfkVcPuExZOTO+nzcEcw9Ew8vunl7YX567tZ+0Es IdGQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Return-Path: Received: from lists.xenproject.org (lists.xenproject.org. [192.237.175.120]) by mx.google.com with ESMTPS id d8si8487681jah.69.2019.06.10.12.33.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 10 Jun 2019 12:33:56 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1haQ1y-0007jV-SC; Mon, 10 Jun 2019 19:32:34 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1haQ1x-0007hz-Cx for xen-devel@lists.xenproject.org; Mon, 10 Jun 2019 19:32:33 +0000 X-Inumbo-ID: 7df36253-8bb6-11e9-8980-bc764e045a96 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTP id 7df36253-8bb6-11e9-8980-bc764e045a96; Mon, 10 Jun 2019 19:32:32 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6381C346; Mon, 10 Jun 2019 12:32:32 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7A5833F73C; Mon, 10 Jun 2019 12:32:31 -0700 (PDT) From: Julien Grall To: xen-devel@lists.xenproject.org Date: Mon, 10 Jun 2019 20:32:09 +0100 Message-Id: <20190610193215.23704-12-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190610193215.23704-1-julien.grall@arm.com> References: <20190610193215.23704-1-julien.grall@arm.com> Subject: [Xen-devel] [PATCH 11/17] xen/arm64: head: Document enable_mmu() X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: andre.przywara@arm.com, Julien Grall , Stefano Stabellini , andrii_anisov@epam.com, Oleksandr_Tyshchenko@epam.com MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Document the behavior and the main registers usage within enable_mmu(). Signed-off-by: Julien Grall --- xen/arch/arm/arm64/head.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S index 7b92c1c8eb..d673f7c0d8 100644 --- a/xen/arch/arm/arm64/head.S +++ b/xen/arch/arm/arm64/head.S @@ -583,6 +583,13 @@ virtphys_clash: ret ENDPROC(create_page_tables) +/* + * Turn on the Data Cache and the MMU. The function will return on the ID + * mapping. In other word, the caller is responsible to switch to the runtime + * mapping. + * + * Clobbers x0 - x1 + */ enable_mmu: PRINT("- Turning on paging -\r\n")