From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751895AbYC3IPj (ORCPT ); Sun, 30 Mar 2008 04:15:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751261AbYC3IP1 (ORCPT ); Sun, 30 Mar 2008 04:15:27 -0400 Received: from wf-out-1314.google.com ([209.85.200.172]:44787 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751247AbYC3IPY (ORCPT ); Sun, 30 Mar 2008 04:15:24 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=XuiOL8kcwzmwINGrXUpS7Y476uBHdG4feHrKE9DCmojvaSWvagyFMGrCmhQukqYKSLF5snSfoOcdzS77udlXzfnHPtVtt+r2NlJIMLeIlOQOKa7+iIP9dhjFGmXppvqM8IIC+zgneYCbQBd3U+Mswoaz92fWuglQFJ9H9ZUvbwg= Message-ID: <86802c440803300115w6f3cc08cha72d3dc20bc4ec8e@mail.gmail.com> Date: Sun, 30 Mar 2008 01:15:21 -0700 From: "Yinghai Lu" To: "Huang, Ying" Subject: Re: [PATCH 2/4] x86_64 boot -v2: Add linked list of struct setup_data Cc: "H. Peter Anvin" , andi@firstfloor.org, mingo@redhat.com, tglx@linutronix.de, "Paul Jackson" , linux-kernel@vger.kernel.org In-Reply-To: <1206672584.13404.25.camel@caritas-dev.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1206672584.13404.25.camel@caritas-dev.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 27, 2008 at 7:49 PM, Huang, Ying wrote: > This patch add a field of 64-bit physical pointer to NULL terminated > single linked list of struct setup_data to real-mode kernel > header. This is used as a more extensible boot parameters passing > mechanism. > > Signed-off-by: Huang Ying > > --- > arch/x86/boot/header.S | 6 +++++- > arch/x86/kernel/head64.c | 20 ++++++++++++++++++++ > arch/x86/kernel/setup_64.c | 22 ++++++++++++++++++++++ > include/asm-x86/bootparam.h | 14 ++++++++++++++ > 4 files changed, 61 insertions(+), 1 deletion(-) > ... > +static void __init reserve_setup_data(void) > +{ > + struct setup_data *data; > + unsigned long pa_data; > + char buf[32]; > + > + if (boot_params.hdr.version < 0x0209) > + return; > + pa_data = boot_params.hdr.setup_data; > + while (pa_data) { > + data = early_ioremap(pa_data, sizeof(*data)); > + sprintf(buf, "setup data %x", data->type); > + reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); > + pa_data = data->next; > + early_iounmap(data, sizeof(*data)); > + } current reserve_early will have limitation with 20 entries. /* * Early reserved memory areas. */ #define MAX_EARLY_RES 20 or we need to make reserve_early a little bit smart, so it could merge continuous region... and then your free_early need to be updated too. YH