From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755611Ab0IWWjn (ORCPT ); Thu, 23 Sep 2010 18:39:43 -0400 Received: from mail3.caviumnetworks.com ([12.108.191.235]:5475 "EHLO mail3.caviumnetworks.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753361Ab0IWWia (ORCPT ); Thu, 23 Sep 2010 18:38:30 -0400 From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org, linux-kernel@vger.kernel.org Cc: David Daney Subject: [PATCH 2/9] MIPS: Allow MAX_DMA32_PFN to be overridden. Date: Thu, 23 Sep 2010 15:38:09 -0700 Message-Id: <1285281496-24696-3-git-send-email-ddaney@caviumnetworks.com> X-Mailer: git-send-email 1.7.2.2 In-Reply-To: <1285281496-24696-1-git-send-email-ddaney@caviumnetworks.com> References: <1285281496-24696-1-git-send-email-ddaney@caviumnetworks.com> X-OriginalArrivalTime: 23 Sep 2010 22:38:30.0409 (UTC) FILETIME=[0BE31F90:01CB5B70] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DMA mapping may reduce the usable physical address range usable for 32-bit DMA. Signed-off-by: David Daney --- arch/mips/include/asm/dma.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h index 1353c81..2d47da6 100644 --- a/arch/mips/include/asm/dma.h +++ b/arch/mips/include/asm/dma.h @@ -91,7 +91,10 @@ #define MAX_DMA_ADDRESS (PAGE_OFFSET + 0x01000000) #endif #define MAX_DMA_PFN PFN_DOWN(virt_to_phys((void *)MAX_DMA_ADDRESS)) + +#ifndef MAX_DMA32_PFN #define MAX_DMA32_PFN (1UL << (32 - PAGE_SHIFT)) +#endif /* 8237 DMA controllers */ #define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */ -- 1.7.2.2