From patchwork Fri Oct 2 20:16:10 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 34901 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 430EDB7BF1 for ; Sat, 3 Oct 2009 06:54:26 +1000 (EST) Received: from localhost ([127.0.0.1]:37673 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Mtp8x-0001r1-MB for incoming@patchwork.ozlabs.org; Fri, 02 Oct 2009 16:54:23 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MtoZy-0004Sv-Bh for qemu-devel@nongnu.org; Fri, 02 Oct 2009 16:18:14 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MtoZn-0004MB-CY for qemu-devel@nongnu.org; Fri, 02 Oct 2009 16:18:07 -0400 Received: from [199.232.76.173] (port=46080 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MtoZm-0004Ll-1z for qemu-devel@nongnu.org; Fri, 02 Oct 2009 16:18:02 -0400 Received: from mail.valinux.co.jp ([210.128.90.3]:43783) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MtoZl-0000hy-Gb for qemu-devel@nongnu.org; Fri, 02 Oct 2009 16:18:01 -0400 Received: from nm.local.valinux.co.jp (vagw.valinux.co.jp [210.128.90.14]) by mail.valinux.co.jp (Postfix) with ESMTP id C7FE449D19; Sat, 3 Oct 2009 05:17:56 +0900 (JST) Received: from yamahata by nm.local.valinux.co.jp with local (Exim 4.69) (envelope-from ) id 1MtoY7-00039W-3N; Sat, 03 Oct 2009 05:16:19 +0900 From: Isaku Yamahata To: qemu-devel@nongnu.org, anthony@codemonkey.ws Date: Sat, 3 Oct 2009 05:16:10 +0900 Message-Id: <1254514577-11896-19-git-send-email-yamahata@valinux.co.jp> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1254514577-11896-1-git-send-email-yamahata@valinux.co.jp> References: <1254514577-11896-1-git-send-email-yamahata@valinux.co.jp> X-Virus-Scanned: clamav-milter 0.95.2 at va-mail.local.valinux.co.jp X-Virus-Status: Clean X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) Cc: yamahata@valinux.co.jp Subject: [Qemu-devel] [PATCH 18/25] pci: add helper functions for pci config write function. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org add helper functions for pci config write function to check if its configuration space is changed.. Those function will be used later. Signed-off-by: Isaku Yamahata --- hw/pci.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-) diff --git a/hw/pci.h b/hw/pci.h index 3ea5258..ec989f0 100644 --- a/hw/pci.h +++ b/hw/pci.h @@ -400,6 +400,50 @@ static inline uint32_t pcie_config_size(PCIDevice *d) return pci_is_pcie(d)? PCIE_CONFIG_SPACE_SIZE: PCI_CONFIG_SPACE_SIZE; } +static inline uint8_t *pci_write_config_init(PCIDevice *d, + uint32_t addr, int len) +{ + uint8_t *orig = qemu_malloc(pcie_config_size(d)); + memcpy(orig + addr, d->config + addr, len); + return orig; +} + +static inline void pci_write_config_done(uint8_t *orig) +{ + qemu_free(orig); +} + +static inline int pci_config_changed(const uint8_t *orig, const uint8_t *new, + uint32_t addr, uint32_t len, + uint32_t base, uint32_t end) +{ + uint32_t low = MAX(addr, base); + uint32_t high = MIN(addr + len, end); + + /* check if [addr, addr + len) intersects [base, end) + the intersection is [log, high) */ + if (low >= high) + return 0; + + return memcmp(orig + low, new + low, high - low); +} + +static inline int pci_config_changed_with_size(const uint8_t *orig, + const uint8_t *new, + uint32_t addr, uint32_t len, + uint32_t base, uint32_t size) +{ + uint32_t low = MAX(addr, base); + uint32_t high = MIN(addr + len, base + size); + + /* check if [addr, addr + len) intersects [base, base + size) + the intersection is [log, high) */ + if (low >= high) + return 0; + + return memcmp(orig + low, new + low, high - low); +} + /* lsi53c895a.c */ #define LSI_MAX_DEVS 7