From patchwork Mon Jan 5 12:19:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 5567571 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C96919F2ED for ; Mon, 5 Jan 2015 12:20:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 054A920166 for ; Mon, 5 Jan 2015 12:20:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 192D92015A for ; Mon, 5 Jan 2015 12:20:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753604AbbAEMUA (ORCPT ); Mon, 5 Jan 2015 07:20:00 -0500 Received: from mailout1.w1.samsung.com ([210.118.77.11]:44322 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753625AbbAEMTY (ORCPT ); Mon, 5 Jan 2015 07:19:24 -0500 Received: from eucpsbgm1.samsung.com (unknown [203.254.199.244]) by mailout1.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NHP00JCSEF69C10@mailout1.w1.samsung.com>; Mon, 05 Jan 2015 12:23:30 +0000 (GMT) X-AuditID: cbfec7f4-b7f126d000001e9a-11-54aa814ab0bc Received: from eusync2.samsung.com ( [203.254.199.212]) by eucpsbgm1.samsung.com (EUCPMTA) with SMTP id 72.D8.07834.A418AA45; Mon, 05 Jan 2015 12:19:22 +0000 (GMT) Received: from amdc1339.digital.local ([106.116.147.30]) by eusync2.samsung.com (Oracle Communications Messaging Server 7u4-23.01 (7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPA id <0NHP00AYXE7XH550@eusync2.samsung.com>; Mon, 05 Jan 2015 12:19:22 +0000 (GMT) From: Marek Szyprowski To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Marek Szyprowski , Tomasz Figa , Kyungmin Park , linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org, Arnd Bergmann , Olof Johansson , Russell King - ARM Linux , Kukjin Kim , lauraa@codeaurora.org, linus.walleij@linaro.org, tony@atomide.com, drake@endlessm.com, loeliger@gmail.com, Mark Rutland , nm@ti.com, khilman@linaro.org Subject: [PATCH v11 8/9] ARM: EXYNOS: Add support for non-secure L2X0 resume Date: Mon, 05 Jan 2015 13:19:07 +0100 Message-id: <1420460348-20302-9-git-send-email-m.szyprowski@samsung.com> X-Mailer: git-send-email 1.9.2 In-reply-to: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> References: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGLMWRmVeSWpSXmKPExsVy+t/xK7pejatCDDb8lbP4O+kYu8Wj+Y+Z LXoXXGWz+Hp4BaPF2aY37BbbO2ewW0z5s5zJYtPja6wWl3fNYbOYvaSfxWLG+X1MFrcv81qc 276FxWLtkbvsFkuvX2SyePPjLJPFqeuf2SxW7frDaLH/ipeDsMeaeWsYPVqae9g8fv+axOjx 7eskFo/Lfb1MHou+Z3nsnHWX3ePOtT1sHpuX1HtcOdHE6tG3ZRWjx/Eb25k8Pm+SC+CN4rJJ Sc3JLEst0rdL4Mro/65WMEWw4syq1ywNjP95uxg5OSQETCQWPepnhbDFJC7cW8/WxcjFISSw lFFi7/9XzBBOH5NE/9uDTCBVbAKGEl1vu9hAbBEBN4l/6w6BdTALTGOR2HTkPDNIQljAR2JV 83Mwm0VAVeLVnAWMIDavgIfE7nXX2CHWyUn8f7kCbCingKfE0r37wOJCQDVnbq1ln8DIu4CR YRWjaGppckFxUnquoV5xYm5xaV66XnJ+7iZGSFx82cG4+JjVIUYBDkYlHl6PEytDhFgTy4or cw8xSnAwK4nwvkpfFSLEm5JYWZValB9fVJqTWnyIkYmDU6qB0SeuMT74p/YUibz9u259nP87 /5rATmMGkYfLpA6K+nrm37Hnuz/v74tLB2yWlcZ0LX8bOG/HzD3KopU3fn/71mQoflS/7WBW lerd0xMzOTMebS97OS2UP+ry0/3Lc2dm1sjXSfrxzkq2kZl0ovXYuYV+j0X2FWzkqwmJOWVp 855Dd+GXuDtCa5RYijMSDbWYi4oTAY9ovQZpAgAA Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tomasz Figa On Exynos SoCs it is necessary to resume operation of L2C early in assembly code, because otherwise certain systems will crash. This patch adds necessary code to non-secure resume handler. Signed-off-by: Tomasz Figa [rewrote the code accessing l2x0_saved_regs] Sigend-off-by: Marek Szyprowski Acked-by: Arnd Bergmann Acked-by: Kukjin Kim --- arch/arm/mach-exynos/sleep.S | 46 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/arch/arm/mach-exynos/sleep.S b/arch/arm/mach-exynos/sleep.S index e3c373082bbe..31d25834b9c4 100644 --- a/arch/arm/mach-exynos/sleep.S +++ b/arch/arm/mach-exynos/sleep.S @@ -16,6 +16,8 @@ */ #include +#include +#include #include "smc.h" #define CPU_MASK 0xff0ffff0 @@ -74,6 +76,45 @@ ENTRY(exynos_cpu_resume_ns) mov r0, #SMC_CMD_C15RESUME dsb smc #0 +#ifdef CONFIG_CACHE_L2X0 + adr r0, 1f + ldr r2, [r0] + add r0, r2, r0 + + /* Check that the address has been initialised. */ + ldr r1, [r0, #L2X0_R_PHY_BASE] + teq r1, #0 + beq skip_l2x0 + + /* Check if controller has been enabled. */ + ldr r2, [r1, #L2X0_CTRL] + tst r2, #0x1 + bne skip_l2x0 + + ldr r1, [r0, #L2X0_R_TAG_LATENCY] + ldr r2, [r0, #L2X0_R_DATA_LATENCY] + ldr r3, [r0, #L2X0_R_PREFETCH_CTRL] + mov r0, #SMC_CMD_L2X0SETUP1 + smc #0 + + /* Reload saved regs pointer because smc corrupts registers. */ + adr r0, 1f + ldr r2, [r0] + add r0, r2, r0 + + ldr r1, [r0, #L2X0_R_PWR_CTRL] + ldr r2, [r0, #L2X0_R_AUX_CTRL] + mov r0, #SMC_CMD_L2X0SETUP2 + smc #0 + + mov r0, #SMC_CMD_L2X0INVALL + smc #0 + + mov r1, #1 + mov r0, #SMC_CMD_L2X0CTRL + smc #0 +skip_l2x0: +#endif /* CONFIG_CACHE_L2X0 */ skip_cp15: b cpu_resume ENDPROC(exynos_cpu_resume_ns) @@ -83,3 +124,8 @@ cp15_save_diag: .globl cp15_save_power cp15_save_power: .long 0 @ cp15 power control + +#ifdef CONFIG_CACHE_L2X0 + .align +1: .long l2x0_saved_regs - . +#endif /* CONFIG_CACHE_L2X0 */