From patchwork Mon Aug 6 09:42:20 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 1277741 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 24FC43FC23 for ; Mon, 6 Aug 2012 09:46:06 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SyJqI-0001pX-CX; Mon, 06 Aug 2012 09:43:18 +0000 Received: from mail.free-electrons.com ([88.190.12.23]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SyJps-0001lI-G8 for linux-arm-kernel@lists.infradead.org; Mon, 06 Aug 2012 09:42:54 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 6FA0D16D; Mon, 6 Aug 2012 11:42:41 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 shortcircuit=no autolearn=ham version=3.3.1 Received: from localhost (37-8-189-177.coucou-networks.fr [37.8.189.177]) by mail.free-electrons.com (Postfix) with ESMTPSA id C1CC8187; Mon, 6 Aug 2012 11:42:29 +0200 (CEST) From: Thomas Petazzoni To: Jason Cooper , Andrew Lunn , Gregory Clement Subject: [PATCH 4/5] arm: mvebu: add basic address decoding support to Armada 370/XP Date: Mon, 6 Aug 2012 11:42:20 +0200 Message-Id: <1344246141-23931-5-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1344246141-23931-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1344246141-23931-1-git-send-email-thomas.petazzoni@free-electrons.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Lior Amsalem , Ike Pan , Albert Stone , Nadav Haklai , Ian Molton , David Marlin , Yehuda Yitschak , Jani Monoses , Tawfik Bayouk , Dan Frazier , Eran Ben-Avi , Li Li , Leif Lindholm , Arnd Bergmann , Jon Masters , Ben Dooks , linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , Chris Van Hoof , Nicolas Pitre , Maen Suleiman , Shadi Ammouri , Olof Johansson , Eric Miao X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This commit adds basic support for address decoding configuration for the Armada 370 and Armada XP SoCs, re-using the infrastructure provided in plat-orion. For now, only a BootROM window is configured on Armada XP, which is needed to get the non-boot CPUs started and is therefore a requirement for SMP support. Signed-off-by: Thomas Petazzoni Acked-by: Gregory CLEMENT --- arch/arm/mach-mvebu/Makefile | 2 +- arch/arm/mach-mvebu/addr-map.c | 134 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 135 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-mvebu/addr-map.c diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile index e61d2b8..2143558 100644 --- a/arch/arm/mach-mvebu/Makefile +++ b/arch/arm/mach-mvebu/Makefile @@ -1,2 +1,2 @@ obj-y += system-controller.o -obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o irq-armada-370-xp.o +obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o irq-armada-370-xp.o addr-map.o diff --git a/arch/arm/mach-mvebu/addr-map.c b/arch/arm/mach-mvebu/addr-map.c new file mode 100644 index 0000000..fe454a4 --- /dev/null +++ b/arch/arm/mach-mvebu/addr-map.c @@ -0,0 +1,134 @@ +/* + * Address map functions for Marvell 370 / XP SoCs + * + * Copyright (C) 2012 Marvell + * + * Thomas Petazzoni + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include +#include + +/* + * Generic Address Decode Windows bit settings + */ +#define ARMADA_XP_TARGET_DEV_BUS 1 +#define ARMADA_XP_ATTR_DEV_BOOTROM 0x1D +#define ARMADA_XP_TARGET_ETH1 3 +#define ARMADA_XP_TARGET_PCIE_0_2 4 +#define ARMADA_XP_TARGET_ETH0 7 +#define ARMADA_XP_TARGET_PCIE_1_3 8 + +#define ARMADA_370_TARGET_DEV_BUS 1 +#define ARMADA_370_ATTR_DEV_BOOTROM 0x1D +#define ARMADA_370_TARGET_PCIE_0 4 +#define ARMADA_370_TARGET_PCIE_1 8 + +#define ARMADA_WINDOW_8_PLUS_OFFSET 0x90 +#define ARMADA_SDRAM_ADDR_DECODING_OFFSET 0x180 + +static const struct __initdata orion_addr_map_info +armada_xp_addr_map_info[] = { + /* + * Window for the BootROM, needed for SMP on Armada XP + */ + { 0, 0xfff00000, SZ_1M, ARMADA_XP_TARGET_DEV_BUS, + ARMADA_XP_ATTR_DEV_BOOTROM, -1 }, + /* End marker */ + { -1, 0, 0, 0, 0, 0 }, +}; + +static const struct __initdata orion_addr_map_info +armada_370_addr_map_info[] = { + /* End marker */ + { -1, 0, 0, 0, 0, 0 }, +}; + +static struct of_device_id of_addr_decoding_controller_table[] = { + { .compatible = "marvell,armada-addr-decoding-controller" }, + { /* end of list */ }, +}; + +static void __iomem * +armada_cfg_base(const struct orion_addr_map_cfg *cfg, int win) +{ + unsigned int offset; + + /* The register layout is a bit annoying and the below code + * tries to cope with it. + * - At offset 0x0, there are the registers for the first 8 + * windows, with 4 registers of 32 bits per window (ctrl, + * base, remap low, remap high) + * - Then at offset 0x80, there is a hole of 0x10 bytes for + * the internal registers base address and internal units + * sync barrier register. + * - Then at offset 0x90, there the registers for 12 + * windows, with only 2 registers of 32 bits per window + * (ctrl, base). + */ + if (win < 8) + offset = (win << 4); + else + offset = ARMADA_WINDOW_8_PLUS_OFFSET + (win << 3); + + return cfg->bridge_virt_base + offset; +} + +static struct __initdata orion_addr_map_cfg addr_map_cfg = { + .num_wins = 20, + .remappable_wins = 8, + .win_cfg_base = armada_cfg_base, +}; + +static int __init armada_setup_cpu_mbus(void) +{ + struct device_node *np; + void __iomem *mbus_unit_addr_decoding_base; + void __iomem *sdram_addr_decoding_base; + + np = of_find_matching_node(NULL, of_addr_decoding_controller_table); + if (!np) + return -ENODEV; + + mbus_unit_addr_decoding_base = of_iomap(np, 0); + BUG_ON(!mbus_unit_addr_decoding_base); + + sdram_addr_decoding_base = + mbus_unit_addr_decoding_base + + ARMADA_SDRAM_ADDR_DECODING_OFFSET; + + addr_map_cfg.bridge_virt_base = mbus_unit_addr_decoding_base; + + /* + * Disable, clear and configure windows. + */ + if (of_machine_is_compatible("marvell,armadaxp")) + orion_config_wins(&addr_map_cfg, armada_xp_addr_map_info); + else if (of_machine_is_compatible("marvell,armada370")) + orion_config_wins(&addr_map_cfg, armada_370_addr_map_info); + else { + pr_err("Unsupported SoC\n"); + return -EINVAL; + } + + /* + * Setup MBUS dram target info. + */ + orion_setup_cpu_mbus_target(&addr_map_cfg, + sdram_addr_decoding_base); + return 0; +} + +/* Using a early_initcall is needed so that this initialization gets + * done before the SMP initialization, which requires the BootROM to + * be remapped. */ +early_initcall(armada_setup_cpu_mbus);