From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752540Ab0CAWye (ORCPT ); Mon, 1 Mar 2010 17:54:34 -0500 Received: from e34.co.us.ibm.com ([32.97.110.152]:49025 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752153Ab0CAWyd (ORCPT ); Mon, 1 Mar 2010 17:54:33 -0500 Subject: [PATCH 2/3] arm: Convert arm to arch_gettimeoffset() From: john stultz To: Russell King Cc: lkml , Andrew Morton , Thomas Gleixner , linux-arm-kernel In-Reply-To: <1267483897.4216.91.camel@localhost.localdomain> References: <1267483897.4216.91.camel@localhost.localdomain> Content-Type: text/plain; charset="UTF-8" Date: Mon, 01 Mar 2010 14:54:14 -0800 Message-ID: <1267484054.4216.94.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch converts arm to use GENERIC_TIME via the arch_getoffset() infrastructure, reducing the amount of arch specific code we need to maintain. The arm architecture is one of the last 2 arches that need to be converted. This patch applies on top of Linus' current -git tree I've taken my best swing at converting this, but I'm not 100% confident I got it right. My cross-compiler is now out of date (gcc4.2) so I wasn't able to check if it compiled. Any assistance from arch maintainers or testers to get this merged would be great. Signed-off-by: John Stultz --- arch/arm/Kconfig | 51 ++++++++++++++------------- arch/arm/include/asm/mach/time.h | 2 +- arch/arm/kernel/time.c | 70 +++---------------------------------- arch/arm/mach-at91/Kconfig | 11 +----- 4 files changed, 35 insertions(+), 99 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3b18128..ff8e0b4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -42,6 +42,11 @@ config GENERIC_GPIO config GENERIC_TIME bool + default y + +config ARCH_USES_GETTIMEOFFSET + bool + default n config GENERIC_CLOCKEVENTS bool @@ -224,6 +229,7 @@ config ARCH_AAEC2000 select CPU_ARM920T select ARM_AMBA select HAVE_CLK + select ARCH_USES_GETTIMEOFFSET help This enables support for systems based on the Agilent AAEC-2000 @@ -234,6 +240,7 @@ config ARCH_INTEGRATOR select HAVE_CLK select COMMON_CLKDEV select ICST525 + select ARCH_USES_GETTIMEOFFSET help Support for ARM's Integrator platform. @@ -243,7 +250,6 @@ config ARCH_REALVIEW select HAVE_CLK select COMMON_CLKDEV select ICST307 - select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB help @@ -256,7 +262,6 @@ config ARCH_VERSATILE select HAVE_CLK select COMMON_CLKDEV select ICST307 - select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB help @@ -267,6 +272,7 @@ config ARCH_AT91 select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB select HAVE_CLK + select ARCH_USES_GETTIMEOFFSET help This enables support for systems based on the Atmel AT91RM9200, AT91SAM9 and AT91CAP9 processors. @@ -274,6 +280,7 @@ config ARCH_AT91 config ARCH_CLPS711X bool "Cirrus Logic CLPS711x/EP721x-based" select CPU_ARM720T + select ARCH_USES_GETTIMEOFFSET help Support for Cirrus Logic 711x/721x based boards. @@ -282,6 +289,7 @@ config ARCH_GEMINI select CPU_FA526 select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB + select ARCH_USES_GETTIMEOFFSET help Support for the Cortina Systems Gemini family SoCs @@ -290,6 +298,7 @@ config ARCH_EBSA110 select CPU_SA110 select ISA select NO_IOPORT + select ARCH_USES_GETTIMEOFFSET help This is an evaluation board for the StrongARM processor available from Digital. It has limited hardware on-board, including an @@ -306,6 +315,7 @@ config ARCH_EP93XX select COMMON_CLKDEV select ARCH_REQUIRE_GPIOLIB select ARCH_HAS_HOLES_MEMORYMODEL + select ARCH_USES_GETTIMEOFFSET help This enables support for the Cirrus EP93xx series of CPUs. @@ -313,13 +323,13 @@ config ARCH_FOOTBRIDGE bool "FootBridge" select CPU_SA110 select FOOTBRIDGE + select ARCH_USES_GETTIMEOFFSET help Support for systems based on the DC21285 companion chip ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. config ARCH_MXC bool "Freescale MXC/iMX-based" - select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_MTD_XIP select GENERIC_GPIO @@ -334,7 +344,6 @@ config ARCH_STMP3XXX select HAVE_CLK select COMMON_CLKDEV select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select GENERIC_GPIO select USB_ARCH_HAS_EHCI @@ -346,7 +355,6 @@ config ARCH_NETX select CPU_ARM926T select ARM_VIC select GENERIC_CLOCKEVENTS - select GENERIC_TIME help This enables support for systems based on the Hilscher NetX Soc @@ -354,6 +362,7 @@ config ARCH_H720X bool "Hynix HMS720x-based" select CPU_ARM720T select ISA_DMA_API + select ARCH_USES_GETTIMEOFFSET help This enables support for systems based on the Hynix HMS720x @@ -364,7 +373,6 @@ config ARCH_NOMADIK select CPU_ARM926T select HAVE_CLK select COMMON_CLKDEV - select GENERIC_TIME select GENERIC_CLOCKEVENTS select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB @@ -379,6 +387,7 @@ config ARCH_IOP13XX select PCI select ARCH_SUPPORTS_MSI select VMSPLIT_1G + select ARCH_USES_GETTIMEOFFSET help Support for Intel's IOP13XX (XScale) family of processors. @@ -390,6 +399,7 @@ config ARCH_IOP32X select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB + select ARCH_USES_GETTIMEOFFSET help Support for Intel's 80219 and IOP32X (XScale) family of processors. @@ -402,6 +412,7 @@ config ARCH_IOP33X select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB + select ARCH_USES_GETTIMEOFFSET help Support for Intel's IOP33X (XScale) family of processors. @@ -410,6 +421,7 @@ config ARCH_IXP23XX depends on MMU select CPU_XSC3 select PCI + select ARCH_USES_GETTIMEOFFSET help Support for Intel's IXP23xx (XScale) family of processors. @@ -418,6 +430,7 @@ config ARCH_IXP2000 depends on MMU select CPU_XSCALE select PCI + select ARCH_USES_GETTIMEOFFSET help Support for Intel's IXP2400/2800 (XScale) family of processors. @@ -426,7 +439,6 @@ config ARCH_IXP4XX depends on MMU select CPU_XSCALE select GENERIC_GPIO - select GENERIC_TIME select GENERIC_CLOCKEVENTS select DMABOUNCE if PCI help @@ -436,6 +448,7 @@ config ARCH_L7200 bool "LinkUp-L7200" select CPU_ARM720T select FIQ + select ARCH_USES_GETTIMEOFFSET help Say Y here if you intend to run this kernel on a LinkUp Systems L7200 Software Development Board which uses an ARM720T processor. @@ -451,7 +464,6 @@ config ARCH_DOVE select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help @@ -463,7 +475,6 @@ config ARCH_KIRKWOOD select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help @@ -473,7 +484,6 @@ config ARCH_KIRKWOOD config ARCH_LOKI bool "Marvell Loki (88RC8480)" select CPU_FEROCEON - select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help @@ -485,7 +495,6 @@ config ARCH_MV78XX0 select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help @@ -499,7 +508,6 @@ config ARCH_ORION5X select PCI select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help @@ -514,7 +522,6 @@ config ARCH_MMP select ARCH_REQUIRE_GPIOLIB select HAVE_CLK select COMMON_CLKDEV - select GENERIC_TIME select GENERIC_CLOCKEVENTS select TICK_ONESHOT select PLAT_PXA @@ -526,6 +533,7 @@ config ARCH_KS8695 select CPU_ARM922T select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB + select ARCH_USES_GETTIMEOFFSET help Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based System-on-Chip devices. @@ -534,7 +542,6 @@ config ARCH_NS9XXX bool "NetSilicon NS9xxx" select CPU_ARM926T select GENERIC_GPIO - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_CLK help @@ -550,7 +557,6 @@ config ARCH_W90X900 select GENERIC_GPIO select HAVE_CLK select COMMON_CLKDEV - select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for Nuvoton (Winbond logic dept.) ARM9 processor, @@ -575,6 +581,7 @@ config ARCH_PNX4008 select CPU_ARM926T select HAVE_CLK select COMMON_CLKDEV + select ARCH_USES_GETTIMEOFFSET help This enables support for Philips PNX4008 mobile platform. @@ -587,7 +594,6 @@ config ARCH_PXA select HAVE_CLK select COMMON_CLKDEV select ARCH_REQUIRE_GPIOLIB - select GENERIC_TIME select GENERIC_CLOCKEVENTS select TICK_ONESHOT select PLAT_PXA @@ -597,7 +603,6 @@ config ARCH_PXA config ARCH_MSM bool "Qualcomm MSM" select CPU_V6 - select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for Qualcomm MSM7K based systems. This runs on the ARM11 @@ -615,6 +620,7 @@ config ARCH_RPC select ISA_DMA_API select NO_IOPORT select ARCH_SPARSEMEM_ENABLE + select ARCH_USES_GETTIMEOFFSET help On the Acorn Risc-PC, Linux can support the internal IDE disk and CD-ROM interface, serial and parallel port, and the floppy drive. @@ -628,7 +634,6 @@ config ARCH_SA1100 select ARCH_HAS_CPUFREQ select CPU_FREQ select GENERIC_GPIO - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_CLK select TICK_ONESHOT @@ -641,6 +646,7 @@ config ARCH_S3C2410 select GENERIC_GPIO select ARCH_HAS_CPUFREQ select HAVE_CLK + select ARCH_USES_GETTIMEOFFSET help Samsung S3C2410X CPU based systems, such as the Simtec Electronics BAST (), the IPAQ 1940 or @@ -650,6 +656,7 @@ config ARCH_S3C64XX bool "Samsung S3C64XX" select GENERIC_GPIO select HAVE_CLK + select ARCH_USES_GETTIMEOFFSET select ARCH_HAS_CPUFREQ help Samsung S3C64XX series based systems @@ -670,6 +677,7 @@ config ARCH_SHARK select ISA_DMA select ZONE_DMA select PCI + select ARCH_USES_GETTIMEOFFSET help Support for the StrongARM based Digital DNARD machine, also known as "Shark" (). @@ -679,6 +687,7 @@ config ARCH_LH7A40X select CPU_ARM922T select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM + select ARCH_USES_GETTIMEOFFSET help Say Y here for systems based on one of the Sharp LH7A40X System on a Chip processors. These CPUs include an ARM922T @@ -692,7 +701,6 @@ config ARCH_U300 select HAVE_TCM select ARM_AMBA select ARM_VIC - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_CLK select COMMON_CLKDEV @@ -703,7 +711,6 @@ config ARCH_U300 config ARCH_DAVINCI bool "TI DaVinci" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB @@ -722,7 +729,6 @@ config ARCH_OMAP select HAVE_CLK select ARCH_REQUIRE_GPIOLIB select ARCH_HAS_CPUFREQ - select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_HOLES_MEMORYMODEL help @@ -734,7 +740,6 @@ config ARCH_BCMRING select CPU_V6 select ARM_AMBA select COMMON_CLKDEV - select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB help @@ -744,7 +749,6 @@ config ARCH_U8500 bool "ST-Ericsson U8500 Series" select CPU_V7 select ARM_AMBA - select GENERIC_TIME select GENERIC_CLOCKEVENTS select COMMON_CLKDEV help @@ -867,7 +871,6 @@ config ARCH_ACORN config PLAT_IOP bool select GENERIC_CLOCKEVENTS - select GENERIC_TIME config PLAT_ORION bool diff --git a/arch/arm/include/asm/mach/time.h b/arch/arm/include/asm/mach/time.h index 8bffc3f..35d408f 100644 --- a/arch/arm/include/asm/mach/time.h +++ b/arch/arm/include/asm/mach/time.h @@ -38,7 +38,7 @@ struct sys_timer { void (*init)(void); void (*suspend)(void); void (*resume)(void); -#ifndef CONFIG_GENERIC_TIME +#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET unsigned long (*offset)(void); #endif }; diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c index 2875380..38c261f 100644 --- a/arch/arm/kernel/time.c +++ b/arch/arm/kernel/time.c @@ -72,12 +72,15 @@ unsigned long profile_pc(struct pt_regs *regs) EXPORT_SYMBOL(profile_pc); #endif -#ifndef CONFIG_GENERIC_TIME -static unsigned long dummy_gettimeoffset(void) +#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET +u32 arch_gettimeoffset(void) { + if (system_timer->offset != NULL) + return system_timer->offset() * 1000; + return 0; } -#endif +#endif /* CONFIG_ARCH_USES_GETTIMEOFFSET */ #ifdef CONFIG_LEDS_TIMER static inline void do_leds(void) @@ -93,63 +96,6 @@ static inline void do_leds(void) #define do_leds() #endif -#ifndef CONFIG_GENERIC_TIME -void do_gettimeofday(struct timeval *tv) -{ - unsigned long flags; - unsigned long seq; - unsigned long usec, sec; - - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - usec = system_timer->offset(); - sec = xtime.tv_sec; - usec += xtime.tv_nsec / 1000; - } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - - /* usec may have gone up a lot: be safe */ - while (usec >= 1000000) { - usec -= 1000000; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; -} - -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) -{ - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* - * This is revolting. We need to set "xtime" correctly. However, the - * value in this location is the value at the most recent update of - * wall time. Discover what correction gettimeofday() would have - * done, and then undo it! - */ - nsec -= system_timer->offset() * NSEC_PER_USEC; - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - write_sequnlock_irq(&xtime_lock); - clock_was_set(); - return 0; -} - -EXPORT_SYMBOL(do_settimeofday); -#endif /* !CONFIG_GENERIC_TIME */ #ifndef CONFIG_GENERIC_CLOCKEVENTS /* @@ -214,10 +160,6 @@ device_initcall(timer_init_sysfs); void __init time_init(void) { -#ifndef CONFIG_GENERIC_TIME - if (system_timer->offset == NULL) - system_timer->offset = dummy_gettimeoffset; -#endif system_timer->init(); } diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig index 2db43a5..2d040a4 100644 --- a/arch/arm/mach-at91/Kconfig +++ b/arch/arm/mach-at91/Kconfig @@ -23,14 +23,12 @@ choice config ARCH_AT91RM9200 bool "AT91RM9200" select CPU_ARM920T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_AT91_USART3 config ARCH_AT91SAM9260 bool "AT91SAM9260 or AT91SAM9XE" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_AT91_USART3 select HAVE_AT91_USART4 @@ -39,28 +37,24 @@ config ARCH_AT91SAM9260 config ARCH_AT91SAM9261 bool "AT91SAM9261" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_FB_ATMEL config ARCH_AT91SAM9G10 bool "AT91SAM9G10" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_FB_ATMEL config ARCH_AT91SAM9263 bool "AT91SAM9263" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_FB_ATMEL config ARCH_AT91SAM9RL bool "AT91SAM9RL" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_AT91_USART3 select HAVE_FB_ATMEL @@ -68,7 +62,6 @@ config ARCH_AT91SAM9RL config ARCH_AT91SAM9G20 bool "AT91SAM9G20" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_AT91_USART3 select HAVE_AT91_USART4 @@ -77,7 +70,6 @@ config ARCH_AT91SAM9G20 config ARCH_AT91SAM9G45 bool "AT91SAM9G45" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_AT91_USART3 select HAVE_FB_ATMEL @@ -85,18 +77,17 @@ config ARCH_AT91SAM9G45 config ARCH_AT91CAP9 bool "AT91CAP9" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS select HAVE_FB_ATMEL config ARCH_AT572D940HF bool "AT572D940HF" select CPU_ARM926T - select GENERIC_TIME select GENERIC_CLOCKEVENTS config ARCH_AT91X40 bool "AT91x40" + select ARCH_USES_GETTIMEOFFSET endchoice -- 1.6.0.4