From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yong Wu Subject: [PATCH v2 0/2] MT8173 IOMMU 4GB MODE SUPPORT Date: Mon, 14 Mar 2016 06:01:09 +0800 Message-ID: <1457906471-31549-1-git-send-email-yong.wu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel , Robin Murphy , Will Deacon Cc: arnd-r2nGTMty4D4@public.gmane.org, srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, Catalin Marinas , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, milton.chiang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, Tomasz Figa , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Rob Herring , Daniel Kurtz , Laurent Pinchart , Sasha Hauer , Matthias Brugger , linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, youhua.li-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Lucas Stach List-Id: linux-mediatek@lists.infradead.org This patch-set add MTK 4GB mode support on the Short-Descriptor. Normally, the memory map in mt8173 looks like below: Physical addr | 1st GB | -> HW SRAM and Regs |-------- | 2nd GB | -> Dram 1st GB |-------- | 3rd GB | -> Dram 2nd GB |-------- | 4th GB | -> Dram 3rd GB |-------- Then if the dram size is 4GB, we have to add bit33 in the physical address. We have a "DRAM 4GB mode" toggle bit for this. If it is enabled, from CPU's point of view, the dram will be shifted to start from PA 0x1_00000000. Then the dram PA is from 0x1_00000000~0x1_ffffffff. MTK extend the bit9 of the standard pgtable descriptor as the 4GB mode. we add a special quirk for this. v2: - Rebase on next-20160310. - Rename IO_PGTABLE_QUIRK_MTK_4GB_EXT to IO_PGTABLE_QUIRK_ARM_MTK_4GB. - Improve the comment of this "4GB mode". Yong Wu (2): iommu/io-pgtable: Add MTK 4GB mode in Short-descriptor iommu/mediatek: Add 4GB mode support drivers/iommu/io-pgtable-arm-v7s.c | 13 ++++++++++++- drivers/iommu/io-pgtable.h | 6 ++++++ drivers/iommu/mtk_iommu.c | 14 +++++++++++--- 3 files changed, 29 insertions(+), 4 deletions(-) -- 1.8.1.1.dirty