From patchwork Wed Aug 24 09:23:28 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 1091652 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p7O9OGPv018286 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 24 Aug 2011 09:24:37 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qw9gk-0006n9-U4; Wed, 24 Aug 2011 09:23:59 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qw9gk-0007Hj-Dl; Wed, 24 Aug 2011 09:23:58 +0000 Received: from eu1sys200aog103.obsmtp.com ([207.126.144.115]) by canuck.infradead.org with smtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qw9gg-0007HM-Lp for linux-arm-kernel@lists.infradead.org; Wed, 24 Aug 2011 09:23:56 +0000 Received: from beta.dmz-us.st.com ([167.4.1.35]) (using TLSv1) by eu1sys200aob103.postini.com ([207.126.147.11]) with SMTP ID DSNKTlTDI7tJuchxb7MyLucu1p3XtKiYx6xY@postini.com; Wed, 24 Aug 2011 09:23:54 UTC Received: from zeta.dmz-us.st.com (ns4.st.com [167.4.16.71]) by beta.dmz-us.st.com (STMicroelectronics) with ESMTP id 3A15B6B; Wed, 24 Aug 2011 09:23:42 +0000 (GMT) Received: from relay1.stm.gmessaging.net (unknown [10.230.100.17]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 8D6464E; Wed, 24 Aug 2011 09:23:41 +0000 (GMT) Received: from exdcvycastm003.EQ1STM.local (alteon-source-exch [10.230.100.61]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "exdcvycastm003", Issuer "exdcvycastm003" (not verified)) by relay1.stm.gmessaging.net (Postfix) with ESMTPS id E29BB24C080; Wed, 24 Aug 2011 11:23:35 +0200 (CEST) Received: from localhost.localdomain (10.230.100.153) by smtp.stericsson.com (10.230.100.1) with Microsoft SMTP Server (TLS) id 8.3.83.0; Wed, 24 Aug 2011 11:23:40 +0200 From: Linus Walleij To: Subject: [PATCH 1/3] mach-ux500: factor out l2x0 handling code Date: Wed, 24 Aug 2011 11:23:28 +0200 Message-ID: <1314177808-19114-1-git-send-email-linus.walleij@stericsson.com> X-Mailer: git-send-email 1.7.3.2 MIME-Version: 1.0 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110824_052355_068741_18DCE3C8 X-CRM114-Status: GOOD ( 20.85 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [207.126.144.115 listed in list.dnswl.org] Cc: Linus Walleij , Rabin Vincent , Lee Jones , Srinidhi Kasagar X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Wed, 24 Aug 2011 09:24:37 +0000 (UTC) From: Linus Walleij Following mach-imx we break out the l2x0 handling into its own file, avoiding some ifdefs. Also remove unnecessary creation of local pointers when there is already one file-local readily available. Cc: Srinidhi Kasagar Cc: Rabin Vincent Signed-off-by: Linus Walleij --- arch/arm/mach-ux500/Makefile | 1 + arch/arm/mach-ux500/cache-l2x0.c | 72 ++++++++++++++++++++++++++++++++++++++ arch/arm/mach-ux500/cpu.c | 69 ------------------------------------ 3 files changed, 73 insertions(+), 69 deletions(-) create mode 100644 arch/arm/mach-ux500/cache-l2x0.c diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile index 1694916..9fd00a6 100644 --- a/arch/arm/mach-ux500/Makefile +++ b/arch/arm/mach-ux500/Makefile @@ -4,6 +4,7 @@ obj-y := clock.o cpu.o devices.o devices-common.o \ id.o usb.o +obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \ diff --git a/arch/arm/mach-ux500/cache-l2x0.c b/arch/arm/mach-ux500/cache-l2x0.c new file mode 100644 index 0000000..9d09e4d --- /dev/null +++ b/arch/arm/mach-ux500/cache-l2x0.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include + +static void __iomem *l2x0_base; + +static inline void ux500_cache_wait(void __iomem *reg, unsigned long mask) +{ + /* wait for the operation to complete */ + while (readl_relaxed(reg) & mask) + cpu_relax(); +} + +static inline void ux500_cache_sync(void) +{ + writel_relaxed(0, l2x0_base + L2X0_CACHE_SYNC); + ux500_cache_wait(l2x0_base + L2X0_CACHE_SYNC, 1); +} + +/* + * The L2 cache cannot be turned off in the non-secure world. + * Dummy until a secure service is in place. + */ +static void ux500_l2x0_disable(void) +{ +} + +/* + * This is only called when doing a kexec, just after turning off the L2 + * and L1 cache, and it is surrounded by a spinlock in the generic version. + * However, we're not really turning off the L2 cache right now and the + * PL310 does not support exclusive accesses (used to implement the spinlock). + * So, the invalidation needs to be done without the spinlock. + */ +static void ux500_l2x0_inv_all(void) +{ + uint32_t l2x0_way_mask = (1<<16) - 1; /* Bitmask of active ways */ + + /* invalidate all ways */ + writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY); + ux500_cache_wait(l2x0_base + L2X0_INV_WAY, l2x0_way_mask); + ux500_cache_sync(); +} + +static int ux500_l2x0_init(void) +{ + if (cpu_is_u5500()) + l2x0_base = __io_address(U5500_L2CC_BASE); + else if (cpu_is_u8500()) + l2x0_base = __io_address(U8500_L2CC_BASE); + else + ux500_unknown_soc(); + + /* 64KB way size, 8 way associativity, force WA */ + l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff); + + /* Override invalidate function */ + outer_cache.disable = ux500_l2x0_disable; + outer_cache.inv_all = ux500_l2x0_inv_all; + + return 0; +} + +early_initcall(ux500_l2x0_init); diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c index 76ee355..252e8b3 100644 --- a/arch/arm/mach-ux500/cpu.c +++ b/arch/arm/mach-ux500/cpu.c @@ -11,8 +11,6 @@ #include #include -#include -#include #include #include #include @@ -26,10 +24,6 @@ void __iomem *_PRCMU_BASE; -#ifdef CONFIG_CACHE_L2X0 -static void __iomem *l2x0_base; -#endif - void __init ux500_init_irq(void) { void __iomem *dist_base; @@ -57,69 +51,6 @@ void __init ux500_init_irq(void) clk_init(); } -#ifdef CONFIG_CACHE_L2X0 -static inline void ux500_cache_wait(void __iomem *reg, unsigned long mask) -{ - /* wait for the operation to complete */ - while (readl_relaxed(reg) & mask) - cpu_relax(); -} - -static inline void ux500_cache_sync(void) -{ - void __iomem *base = l2x0_base; - - writel_relaxed(0, base + L2X0_CACHE_SYNC); - ux500_cache_wait(base + L2X0_CACHE_SYNC, 1); -} - -/* - * The L2 cache cannot be turned off in the non-secure world. - * Dummy until a secure service is in place. - */ -static void ux500_l2x0_disable(void) -{ -} - -/* - * This is only called when doing a kexec, just after turning off the L2 - * and L1 cache, and it is surrounded by a spinlock in the generic version. - * However, we're not really turning off the L2 cache right now and the - * PL310 does not support exclusive accesses (used to implement the spinlock). - * So, the invalidation needs to be done without the spinlock. - */ -static void ux500_l2x0_inv_all(void) -{ - void __iomem *base = l2x0_base; - uint32_t l2x0_way_mask = (1<<16) - 1; /* Bitmask of active ways */ - - /* invalidate all ways */ - writel_relaxed(l2x0_way_mask, base + L2X0_INV_WAY); - ux500_cache_wait(base + L2X0_INV_WAY, l2x0_way_mask); - ux500_cache_sync(); -} - -static int ux500_l2x0_init(void) -{ - if (cpu_is_u5500()) - l2x0_base = __io_address(U5500_L2CC_BASE); - else if (cpu_is_u8500()) - l2x0_base = __io_address(U8500_L2CC_BASE); - else - ux500_unknown_soc(); - - /* 64KB way size, 8 way associativity, force WA */ - l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff); - - /* Override invalidate function */ - outer_cache.disable = ux500_l2x0_disable; - outer_cache.inv_all = ux500_l2x0_inv_all; - - return 0; -} -early_initcall(ux500_l2x0_init); -#endif - static void __init ux500_timer_init(void) { #ifdef CONFIG_LOCAL_TIMERS