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Thu, 7 Nov 2024 19:09:00 +0000 Received: from CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::25a9:32c2:a7b0:de9e]) by CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::25a9:32c2:a7b0:de9e%5]) with mapi id 15.20.8137.019; Thu, 7 Nov 2024 19:09:00 +0000 From: Ankur Arora To: linux-pm@vger.kernel.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Cc: catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, pbonzini@redhat.com, vkuznets@redhat.com, rafael@kernel.org, daniel.lezcano@linaro.org, peterz@infradead.org, arnd@arndb.de, lenb@kernel.org, mark.rutland@arm.com, harisokn@amazon.com, mtosatti@redhat.com, sudeep.holla@arm.com, cl@gentwo.org, maz@kernel.org, misono.tomohiro@fujitsu.com, maobibo@loongson.cn, zhenglifeng1@huawei.com, joao.m.martins@oracle.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com Subject: [RFC PATCH v9 14/15] arm64/delay: move some constants out to a separate header Date: Thu, 7 Nov 2024 11:08:17 -0800 Message-Id: <20241107190818.522639-15-ankur.a.arora@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20241107190818.522639-1-ankur.a.arora@oracle.com> References: <20241107190818.522639-1-ankur.a.arora@oracle.com> X-ClientProxiedBy: MW4P221CA0013.NAMP221.PROD.OUTLOOK.COM (2603:10b6:303:8b::18) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO6PR10MB5409:EE_|SJ2PR10MB7037:EE_ X-MS-Office365-Filtering-Correlation-Id: 7b99ad31-b75f-4263-b685-08dcff5fa2d3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014; 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No functional change. Signed-off-by: Ankur Arora Reviewed-by: Christoph Lameter --- arch/arm64/include/asm/delay-const.h | 25 +++++++++++++++++++++++++ arch/arm64/lib/delay.c | 13 +++---------- 2 files changed, 28 insertions(+), 10 deletions(-) create mode 100644 arch/arm64/include/asm/delay-const.h diff --git a/arch/arm64/include/asm/delay-const.h b/arch/arm64/include/asm/delay-const.h new file mode 100644 index 000000000000..63fb5fc24a90 --- /dev/null +++ b/arch/arm64/include/asm/delay-const.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_DELAY_CONST_H +#define _ASM_DELAY_CONST_H + +#include /* For HZ */ + +/* 2**32 / 1000000 (rounded up) */ +#define __usecs_to_xloops_mult 0x10C7UL + +/* 2**32 / 1000000000 (rounded up) */ +#define __nsecs_to_xloops_mult 0x5UL + +extern unsigned long loops_per_jiffy; +static inline unsigned long xloops_to_cycles(unsigned long xloops) +{ + return (xloops * loops_per_jiffy * HZ) >> 32; +} + +#define USECS_TO_CYCLES(time_usecs) \ + xloops_to_cycles((time_usecs) * __usecs_to_xloops_mult) + +#define NSECS_TO_CYCLES(time_nsecs) \ + xloops_to_cycles((time_nsecs) * __nsecs_to_xloops_mult) + +#endif /* _ASM_DELAY_CONST_H */ diff --git a/arch/arm64/lib/delay.c b/arch/arm64/lib/delay.c index cb2062e7e234..511b5597e2a5 100644 --- a/arch/arm64/lib/delay.c +++ b/arch/arm64/lib/delay.c @@ -12,17 +12,10 @@ #include #include #include +#include #include -#define USECS_TO_CYCLES(time_usecs) \ - xloops_to_cycles((time_usecs) * 0x10C7UL) - -static inline unsigned long xloops_to_cycles(unsigned long xloops) -{ - return (xloops * loops_per_jiffy * HZ) >> 32; -} - void __delay(unsigned long cycles) { cycles_t start = get_cycles(); @@ -58,12 +51,12 @@ EXPORT_SYMBOL(__const_udelay); void __udelay(unsigned long usecs) { - __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ + __const_udelay(usecs * __usecs_to_xloops_mult); } EXPORT_SYMBOL(__udelay); void __ndelay(unsigned long nsecs) { - __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ + __const_udelay(nsecs * __nsecs_to_xloops_mult); } EXPORT_SYMBOL(__ndelay);