From patchwork Mon Dec 4 15:09:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 10090609 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9344C60327 for ; Mon, 4 Dec 2017 15:09:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8E97528880 for ; Mon, 4 Dec 2017 15:09:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8317B28E29; Mon, 4 Dec 2017 15:09:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0B0F328880 for ; Mon, 4 Dec 2017 15:09:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752716AbdLDPJh (ORCPT ); Mon, 4 Dec 2017 10:09:37 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:56445 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753997AbdLDPJe (ORCPT ); Mon, 4 Dec 2017 10:09:34 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id 839A320810; Mon, 4 Dec 2017 16:09:32 +0100 (CET) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 5382820738; Mon, 4 Dec 2017 16:09:22 +0100 (CET) From: Thomas Petazzoni To: Yoshinori Sato , Rich Felker , Bjorn Helgaas , Lorenzo Pieralisi Cc: linux-sh@vger.kernel.org, linux-pci@vger.kernel.org, Geert Uytterhoeven , Thomas Petazzoni Subject: [PATCH 1/8] arch/sh: add sh7786_mm_sel() function Date: Mon, 4 Dec 2017 16:09:00 +0100 Message-Id: <20171204150907.24345-2-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171204150907.24345-1-thomas.petazzoni@free-electrons.com> References: <20171204150907.24345-1-thomas.petazzoni@free-electrons.com> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The SH7786 has different physical memory layout configurations, configurable through the MMSELR register. The configuration is typically defined by the bootloader, so Linux generally doesn't care. Except that depending on the configuration, some PCI MEM areas may or may not be available. This commit adds a helper function that allows to retrieve the current physical memory layout configuration. It will be used in a following patch to exclude unusable PCI MEM areas during the PCI initialization. Signed-off-by: Thomas Petazzoni --- arch/sh/include/cpu-sh4/cpu/sh7786.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/sh/include/cpu-sh4/cpu/sh7786.h b/arch/sh/include/cpu-sh4/cpu/sh7786.h index 0df09e638f09..96b8cb1f754a 100644 --- a/arch/sh/include/cpu-sh4/cpu/sh7786.h +++ b/arch/sh/include/cpu-sh4/cpu/sh7786.h @@ -14,6 +14,8 @@ #ifndef __CPU_SH7786_H__ #define __CPU_SH7786_H__ +#include + enum { /* PA */ GPIO_PA7, GPIO_PA6, GPIO_PA5, GPIO_PA4, @@ -131,4 +133,9 @@ enum { GPIO_FN_IRL7, GPIO_FN_IRL6, GPIO_FN_IRL5, GPIO_FN_IRL4, }; +static inline u32 sh7786_mm_sel(void) +{ + return __raw_readl(0xFC400020) & 0x7; +} + #endif /* __CPU_SH7786_H__ */