Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758994Ab3HMR36 (ORCPT ); Tue, 13 Aug 2013 13:29:58 -0400 Received: from service87.mimecast.com ([91.220.42.44]:45605 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758837Ab3HMR3z (ORCPT ); Tue, 13 Aug 2013 13:29:55 -0400 From: Sudeep KarkadaNagesha To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Sudeep.KarkadaNagesha@arm.com, Lorenzo Pieralisi , Catalin Marinas , Will Deacon , Thomas Gleixner , Daniel Lezcano , Sudeep KarkadaNagesha Subject: [PATCH v3 1/6] ARM/ARM64: arch_timer: add macros for bits in control register Date: Tue, 13 Aug 2013 18:29:39 +0100 Message-Id: <1376414984-14182-2-git-send-email-Sudeep.KarkadaNagesha@arm.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1376414984-14182-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> References: <1374492082-13686-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> <1376414984-14182-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> X-OriginalArrivalTime: 13 Aug 2013 17:29:51.0236 (UTC) FILETIME=[B767D440:01CE984A] X-MC-Unique: 113081318295302501 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id r7DHWg5D000850 Content-Length: 3356 Lines: 88 From: Sudeep KarkadaNagesha Add macros to describe the bitfields in the ARM architected timer control register to make code easy to understand. Cc: Catalin Marinas Reviewed-by: Lorenzo Pieralisi Reviewed-by: Will Deacon Signed-off-by: Sudeep KarkadaNagesha --- arch/arm/include/asm/arch_timer.h | 9 +++++++-- arch/arm64/include/asm/arch_timer.h | 12 ++++++++---- include/clocksource/arm_arch_timer.h | 8 ++++++++ 3 files changed, 23 insertions(+), 6 deletions(-) diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index e406d57..9ef74da 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -95,8 +95,13 @@ static inline void arch_counter_set_user_access(void) asm volatile("mrc p15, 0, %0, c14, c1, 0" : "=r" (cntkctl)); - /* disable user access to everything */ - cntkctl &= ~((3 << 8) | (7 << 0)); + /* Disable user access to both physical/virtual counters/timers. */ + /* Also disable virtual event stream */ + cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN + | ARCH_TIMER_USR_VT_ACCESS_EN + | ARCH_TIMER_VIRT_EVT_EN + | ARCH_TIMER_USR_VCT_ACCESS_EN + | ARCH_TIMER_USR_PCT_ACCESS_EN); asm volatile("mcr p15, 0, %0, c14, c1, 0" : : "r" (cntkctl)); } diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h index 98abd47..00b09d0 100644 --- a/arch/arm64/include/asm/arch_timer.h +++ b/arch/arm64/include/asm/arch_timer.h @@ -101,12 +101,16 @@ static inline void arch_counter_set_user_access(void) { u32 cntkctl; - /* Disable user access to the timers and the physical counter. */ asm volatile("mrs %0, cntkctl_el1" : "=r" (cntkctl)); - cntkctl &= ~((3 << 8) | (1 << 0)); - /* Enable user access to the virtual counter and frequency. */ - cntkctl |= (1 << 1); + /* Disable user access to the timers and the physical counter. */ + cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN + | ARCH_TIMER_USR_VT_ACCESS_EN + | ARCH_TIMER_USR_PCT_ACCESS_EN); + + /* Enable user access to the virtual counter. */ + cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN; + asm volatile("msr cntkctl_el1, %0" : : "r" (cntkctl)); } diff --git a/include/clocksource/arm_arch_timer.h b/include/clocksource/arm_arch_timer.h index c463ce9..551f7e9 100644 --- a/include/clocksource/arm_arch_timer.h +++ b/include/clocksource/arm_arch_timer.h @@ -29,6 +29,14 @@ #define ARCH_TIMER_PHYS_ACCESS 0 #define ARCH_TIMER_VIRT_ACCESS 1 +#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */ +#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */ +#define ARCH_TIMER_VIRT_EVT_EN (1 << 2) +#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4) +#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT) +#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */ +#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */ + #ifdef CONFIG_ARM_ARCH_TIMER extern u32 arch_timer_get_rate(void); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/