Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759025Ab3HMRaB (ORCPT ); Tue, 13 Aug 2013 13:30:01 -0400 Received: from service87.mimecast.com ([91.220.42.44]:45638 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757471Ab3HMR34 (ORCPT ); Tue, 13 Aug 2013 13:29:56 -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 , Russell King Subject: [PATCH v3 3/6] ARM: arch_timer: configure and enable event stream Date: Tue, 13 Aug 2013 18:29:41 +0100 Message-Id: <1376414984-14182-4-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 17:29:52.0361 (UTC) FILETIME=[B8137D90:01CE984A] X-MC-Unique: 113081318295406301 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 r7DHVtpx000831 Content-Length: 2666 Lines: 79 From: Sudeep KarkadaNagesha This patch configures the event stream frequency and enables it. It also adds the hwcaps definitions to the user to detect this event stream feature. Cc: Russell King Cc: Catalin Marinas Reviewed-by: Lorenzo Pieralisi Signed-off-by: Will Deacon [sudeep: moving ARM/ARM64 changes into separate patches] Signed-off-by: Sudeep KarkadaNagesha --- arch/arm/include/asm/arch_timer.h | 11 +++++++++-- arch/arm/include/uapi/asm/hwcap.h | 1 + arch/arm/kernel/setup.c | 1 + 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index 12f3fac..25abeb5 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -96,15 +96,22 @@ static inline void arch_counter_set_user_access(int divider) asm volatile("mrc p15, 0, %0, c14, c1, 0" : "=r" (cntkctl)); /* 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_EVT_TRIGGER_MASK | ARCH_TIMER_USR_VCT_ACCESS_EN | ARCH_TIMER_USR_PCT_ACCESS_EN); + /* Set the divider and enable virtual event stream */ + cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT) + | ARCH_TIMER_VIRT_EVT_EN; asm volatile("mcr p15, 0, %0, c14, c1, 0" : : "r" (cntkctl)); } + +static inline void arch_timer_set_hwcap_evtstrm(void) +{ + elf_hwcap |= HWCAP_EVTSTRM; +} #endif #endif diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h index 6d34d08..7dcc10d 100644 --- a/arch/arm/include/uapi/asm/hwcap.h +++ b/arch/arm/include/uapi/asm/hwcap.h @@ -26,5 +26,6 @@ #define HWCAP_VFPD32 (1 << 19) /* set if VFP has 32 regs (not 16) */ #define HWCAP_IDIV (HWCAP_IDIVA | HWCAP_IDIVT) #define HWCAP_LPAE (1 << 20) +#define HWCAP_EVTSTRM (1 << 21) #endif /* _UAPI__ASMARM_HWCAP_H */ diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index afc2489..305ffc9 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -975,6 +975,7 @@ static const char *hwcap_str[] = { "idivt", "vfpd32", "lpae", + "evtstrm", NULL }; -- 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/