From patchwork Tue Mar 13 13:32:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomer Maimon X-Patchwork-Id: 10279141 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 02EED6038F for ; Tue, 13 Mar 2018 14:15:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E3E2528CE3 for ; Tue, 13 Mar 2018 14:15:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D546D28F6E; Tue, 13 Mar 2018 14:15:56 +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=-1.9 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2973528CE3 for ; Tue, 13 Mar 2018 14:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Bls3DBVUlkLH2Jp2Yg4S71M/KSeb/RPYTVCEhA7J6X4=; b=dgPRc1/6D12saxbAs8oBvzqpJE rVBEy4w10GvO9OjGieUAZZk17/ehR6RM3vSDhAXZpqVTlNUEqKm3QUwSZyT3o61+cKgm1awMGKHwg RBz7q79THT+jeGvS3wZ/naV0F63umDe1r+TbV5UXIGW3UyuEaD+2Nu1nl/bVHNDbmwKSye5Wo6Yxz K3TuKt9/f5frwk7B65wjyRbagQZZpxvFKZsjhdEZBjmDRHt4Bk+0AKnknQmRtZ43n92tFoySNTPsP h4YJeYgXJHkBW3AyAX+48a1eIODievk0NfgR9fCe+MviPJ4S/zA8guSQC9An3KvP7K0CLQlFttS+M eInZd0/Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1evkiU-0003P7-RW; Tue, 13 Mar 2018 14:15:50 +0000 Received: from 212.199.177.27.static.012.net.il ([212.199.177.27] helo=herzl.nuvoton.co.il) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1evki4-00024H-Ii for linux-arm-kernel@lists.infradead.org; Tue, 13 Mar 2018 14:15:29 +0000 Received: from talu34.nuvoton.co.il (ntil-fw [212.199.177.25]) by herzl.nuvoton.co.il (8.13.8/8.13.8) with ESMTP id w2DDDumC000708; Tue, 13 Mar 2018 15:13:56 +0200 Received: by talu34.nuvoton.co.il (Postfix, from userid 10070) id 01C005AA81; Tue, 13 Mar 2018 15:32:17 +0200 (IST) From: Tomer Maimon To: robh+dt@kernel.org, linux@armlinux.org.uk, mark.rutland@arm.com, brendanhiggins@google.com, avifishman70@gmail.com, julien.thierry@arm.com, pombredanne@nexb.com, arnd@arndb.de, olof@lixom.net, khilman@kernel.org, joel@jms.id.au Subject: [PATCH v12 1/3] arm: npcm: add basic support for Nuvoton BMCs Date: Tue, 13 Mar 2018 15:32:09 +0200 Message-Id: <1520947931-15426-2-git-send-email-tmaimon77@gmail.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1520947931-15426-1-git-send-email-tmaimon77@gmail.com> References: <1520947931-15426-1-git-send-email-tmaimon77@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180313_071525_236458_5291D535 X-CRM114-Status: GOOD ( 14.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Tomer Maimon MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Adds basic support for the Nuvoton NPCM750 BMC. Signed-off-by: Tomer Maimon Reviewed-by: Avi Fishman Tested-by: Avi Fishman --- arch/arm/Kconfig | 2 ++ arch/arm/Makefile | 1 + arch/arm/mach-npcm/Kconfig | 30 ++++++++++++++++ arch/arm/mach-npcm/Makefile | 6 ++++ arch/arm/mach-npcm/headsmp.S | 17 ++++++++++ arch/arm/mach-npcm/npcm7xx.c | 23 +++++++++++++ arch/arm/mach-npcm/platsmp.c | 81 ++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 160 insertions(+) create mode 100644 arch/arm/mach-npcm/Kconfig create mode 100644 arch/arm/mach-npcm/Makefile create mode 100644 arch/arm/mach-npcm/headsmp.S create mode 100644 arch/arm/mach-npcm/npcm7xx.c create mode 100644 arch/arm/mach-npcm/platsmp.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 7e3d53575486..6a8404cd5150 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -779,6 +779,8 @@ source "arch/arm/mach-netx/Kconfig" source "arch/arm/mach-nomadik/Kconfig" +source "arch/arm/mach-npcm/Kconfig" + source "arch/arm/mach-nspire/Kconfig" source "arch/arm/plat-omap/Kconfig" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index e83f5161fdd8..e4e537f27339 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -196,6 +196,7 @@ machine-$(CONFIG_ARCH_MEDIATEK) += mediatek machine-$(CONFIG_ARCH_MXS) += mxs machine-$(CONFIG_ARCH_NETX) += netx machine-$(CONFIG_ARCH_NOMADIK) += nomadik +machine-$(CONFIG_ARCH_NPCM) += npcm machine-$(CONFIG_ARCH_NSPIRE) += nspire machine-$(CONFIG_ARCH_OXNAS) += oxnas machine-$(CONFIG_ARCH_OMAP1) += omap1 diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig new file mode 100644 index 000000000000..684c9c9a32bd --- /dev/null +++ b/arch/arm/mach-npcm/Kconfig @@ -0,0 +1,30 @@ +menuconfig ARCH_NPCM + bool "Nuvoton NPCM Architecture" + depends on ARCH_MULTI_V7 + select PINCTRL + +if ARCH_NPCM + +config ARCH_NPCM7XX + bool "Support for NPCM7xx BMC (Poleg)" + depends on ARCH_MULTI_V7 + select PINCTRL_NPCM7XX + select NPCM7XX_TIMER + select ARCH_REQUIRE_GPIOLIB + select CACHE_L2X0 + select ARM_GIC + select HAVE_ARM_TWD if SMP + select HAVE_ARM_SCU if SMP + select ARM_ERRATA_764369 if SMP + select ARM_ERRATA_720789 + select ARM_ERRATA_754322 + select ARM_ERRATA_794072 + select PL310_ERRATA_588369 + select PL310_ERRATA_727915 + select MFD_SYSCON + help + General support for NPCM7xx BMC (Poleg). + + Nuvoton NPCM7xx BMC based on the Cortex A9. + +endif diff --git a/arch/arm/mach-npcm/Makefile b/arch/arm/mach-npcm/Makefile new file mode 100644 index 000000000000..227aebbfeb40 --- /dev/null +++ b/arch/arm/mach-npcm/Makefile @@ -0,0 +1,6 @@ +AFLAGS_headsmp.o += -march=armv7-a + +obj-$(CONFIG_ARCH_NPCM7XX) += npcm7xx.o +obj-$(CONFIG_SMP) += platsmp.o headsmp.o + + diff --git a/arch/arm/mach-npcm/headsmp.S b/arch/arm/mach-npcm/headsmp.S new file mode 100644 index 000000000000..c083fe09a07b --- /dev/null +++ b/arch/arm/mach-npcm/headsmp.S @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Nuvoton Technology corporation. +// Copyright 2018 Google, Inc. + +#include +#include +#include + +/* + * The boot ROM does not start secondary CPUs in SVC mode, so we need to do that + * here. + */ +ENTRY(npcm7xx_secondary_startup) + safe_svcmode_maskall r0 + + b secondary_startup +ENDPROC(npcm7xx_secondary_startup) diff --git a/arch/arm/mach-npcm/npcm7xx.c b/arch/arm/mach-npcm/npcm7xx.c new file mode 100644 index 000000000000..a039dc755561 --- /dev/null +++ b/arch/arm/mach-npcm/npcm7xx.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Nuvoton Technology corporation. +// Copyright 2018 Google, Inc. + +#include +#include +#include +#include +#include +#include + +static const char *const npcm7xx_dt_match[] = { + "nuvoton,npcm750", + "nuvoton,npcm730", + NULL +}; + +DT_MACHINE_START(NPCM7XX_DT, "NPCM7XX Chip family") + .atag_offset = 0x100, + .dt_compat = npcm7xx_dt_match, + .l2c_aux_val = 0x0, + .l2c_aux_mask = ~0x0, +MACHINE_END diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c new file mode 100644 index 000000000000..21633c70fe7f --- /dev/null +++ b/arch/arm/mach-npcm/platsmp.c @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Nuvoton Technology corporation. +// Copyright 2018 Google, Inc. + +#define pr_fmt(fmt) "nuvoton,npcm7xx-smp: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define NPCM7XX_SCRPAD_REG 0x13c + +extern void npcm7xx_secondary_startup(void); + +static int npcm7xx_smp_boot_secondary(unsigned int cpu, + struct task_struct *idle) +{ + struct device_node *gcr_np; + void __iomem *gcr_base; + int ret = 0; + + gcr_np = of_find_compatible_node(NULL, NULL, "nuvoton,npcm750-gcr"); + if (!gcr_np) { + pr_err("no gcr device node\n"); + ret = -ENODEV; + goto out; + } + gcr_base = of_iomap(gcr_np, 0); + if (!gcr_base) { + pr_err("could not iomap gcr"); + ret = -ENOMEM; + goto out; + } + + /* give boot ROM kernel start address. */ + iowrite32(__pa_symbol(npcm7xx_secondary_startup), gcr_base + + NPCM7XX_SCRPAD_REG); + /* make sure the previous write is seen by all observers. */ + dsb_sev(); + + iounmap(gcr_base); +out: + return ret; +} + +static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *scu_np; + void __iomem *scu_base; + + scu_np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu"); + if (!scu_np) { + pr_err("no scu device node\n"); + return; + } + scu_base = of_iomap(scu_np, 0); + if (!scu_base) { + pr_err("could not iomap scu"); + return; + } + + scu_enable(scu_base); + + iounmap(scu_base); +} + +static struct smp_operations npcm7xx_smp_ops __initdata = { + .smp_prepare_cpus = npcm7xx_smp_prepare_cpus, + .smp_boot_secondary = npcm7xx_smp_boot_secondary, +}; + +CPU_METHOD_OF_DECLARE(npcm7xx_smp, "nuvoton,npcm750-smp", &npcm7xx_smp_ops);