diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/Kconfig | 5 | ||||
| -rw-r--r-- | arch/sh/kernel/Makefile_64 | 2 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh5/setup-sh5.c | 118 | ||||
| -rw-r--r-- | arch/sh/kernel/time_64.c | 264 |
4 files changed, 120 insertions, 269 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 88eb118e9fa..ca5c09b241c 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -141,10 +141,6 @@ config ARCH_NO_VIRT_TO_BUS config ARCH_HAS_DEFAULT_IDLE def_bool y -config ARCH_USES_GETTIMEOFFSET - def_bool y - depends on SUPERH64 - config IO_TRAPPED bool @@ -190,6 +186,7 @@ config CPU_SH4AL_DSP config CPU_SH5 bool select CPU_HAS_FPU + select SYS_SUPPORTS_TMU config CPU_SHX2 bool diff --git a/arch/sh/kernel/Makefile_64 b/arch/sh/kernel/Makefile_64 index d256c774695..4667d4cac95 100644 --- a/arch/sh/kernel/Makefile_64 +++ b/arch/sh/kernel/Makefile_64 @@ -2,7 +2,7 @@ extra-y := head_64.o init_task.o vmlinux.lds obj-y := debugtraps.o idle.o io.o io_generic.o irq.o machvec.o process_64.o \ ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \ - syscalls_64.o time_64.o topology.o traps.o traps_64.o + syscalls_64.o time_32.o topology.o traps.o traps_64.o obj-y += cpu/ timers/ obj-$(CONFIG_VSYSCALL) += vsyscall/ diff --git a/arch/sh/kernel/cpu/sh5/setup-sh5.c b/arch/sh/kernel/cpu/sh5/setup-sh5.c index 9a362c8f3fe..678d69bdebb 100644 --- a/arch/sh/kernel/cpu/sh5/setup-sh5.c +++ b/arch/sh/kernel/cpu/sh5/setup-sh5.c @@ -13,6 +13,7 @@ #include <linux/serial_sci.h> #include <linux/io.h> #include <linux/mm.h> +#include <linux/sh_timer.h> #include <asm/addrspace.h> static struct plat_sci_port sci_platform_data[] = { @@ -64,6 +65,110 @@ static struct platform_device rtc_device = { .resource = rtc_resources, }; +#define TMU_BLOCK_OFF 0x01020000 +#define TMU_BASE PHYS_PERIPHERAL_BLOCK + TMU_BLOCK_OFF +#define TMU0_BASE (TMU_BASE + 0x8 + (0xc * 0x0)) +#define TMU1_BASE (TMU_BASE + 0x8 + (0xc * 0x1)) +#define TMU2_BASE (TMU_BASE + 0x8 + (0xc * 0x2)) + +static struct sh_timer_config tmu0_platform_data = { + .name = "TMU0", + .channel_offset = 0x04, + .timer_bit = 0, + .clk = "module_clk", + .clockevent_rating = 200, +}; + +static struct resource tmu0_resources[] = { + [0] = { + .name = "TMU0", + .start = TMU0_BASE, + .end = TMU0_BASE + 0xc - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_TUNI0, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device tmu0_device = { + .name = "sh_tmu", + .id = 0, + .dev = { + .platform_data = &tmu0_platform_data, + }, + .resource = tmu0_resources, + .num_resources = ARRAY_SIZE(tmu0_resources), +}; + +static struct sh_timer_config tmu1_platform_data = { + .name = "TMU1", + .channel_offset = 0x10, + .timer_bit = 1, + .clk = "module_clk", + .clocksource_rating = 200, +}; + +static struct resource tmu1_resources[] = { + [0] = { + .name = "TMU1", + .start = TMU1_BASE, + .end = TMU1_BASE + 0xc - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_TUNI1, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device tmu1_device = { + .name = "sh_tmu", + .id = 1, + .dev = { + .platform_data = &tmu1_platform_data, + }, + .resource = tmu1_resources, + .num_resources = ARRAY_SIZE(tmu1_resources), +}; + +static struct sh_timer_config tmu2_platform_data = { + .name = "TMU2", + .channel_offset = 0x1c, + .timer_bit = 2, + .clk = "module_clk", +}; + +static struct resource tmu2_resources[] = { + [0] = { + .name = "TMU2", + .start = TMU2_BASE, + .end = TMU2_BASE + 0xc - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_TUNI2, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device tmu2_device = { + .name = "sh_tmu", + .id = 2, + .dev = { + .platform_data = &tmu2_platform_data, + }, + .resource = tmu2_resources, + .num_resources = ARRAY_SIZE(tmu2_resources), +}; + +static struct platform_device *sh5_early_devices[] __initdata = { + &tmu0_device, + &tmu1_device, + &tmu2_device, +}; + static struct platform_device *sh5_devices[] __initdata = { &sci_device, &rtc_device, @@ -71,7 +176,20 @@ static struct platform_device *sh5_devices[] __initdata = { static int __init sh5_devices_setup(void) { + int ret; + + ret = platform_add_devices(sh5_early_devices, + ARRAY_SIZE(sh5_early_devices)); + if (unlikely(ret != 0)) + return ret; + return platform_add_devices(sh5_devices, ARRAY_SIZE(sh5_devices)); } __initcall(sh5_devices_setup); + +void __init plat_early_device_setup(void) +{ + early_platform_add_devices(sh5_early_devices, + ARRAY_SIZE(sh5_early_devices)); +} diff --git a/arch/sh/kernel/time_64.c b/arch/sh/kernel/time_64.c deleted file mode 100644 index b4fe770e2a3..00000000000 --- a/arch/sh/kernel/time_64.c +++ /dev/null @@ -1,264 +0,0 @@ -/* - * arch/sh/kernel/time_64.c - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 - 2007 Paul Mundt - * Copyright (C) 2003 Richard Curnow - * - * Original TMU/RTC code taken from sh version. - * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka - * Some code taken from i386 version. - * Copyright (C) 1991, 1992, 1995 Linus Torvalds - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/errno.h> -#include <linux/rwsem.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/time.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/profile.h> -#include <linux/smp.h> -#include <linux/module.h> -#include <linux/bcd.h> -#include <linux/timex.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <cpu/registers.h> /* required by inline __asm__ stmt. */ -#include <cpu/irq.h> -#include <asm/addrspace.h> -#include <asm/processor.h> -#include <asm/uaccess.h> -#include <asm/delay.h> -#include <asm/clock.h> - -#define TMU_TOCR_INIT 0x00 -#define TMU0_TCR_INIT 0x0020 -#define TMU_TSTR_INIT 1 -#define TMU_TSTR_OFF 0 - -/* Time Management Unit */ -#define TMU_BLOCK_OFF 0x01020000 -#define TMU_BASE PHYS_PERIPHERAL_BLOCK + TMU_BLOCK_OFF -#define TMU0_BASE tmu_base + 0x8 + (0xc * 0x0) -#define TMU1_BASE tmu_base + 0x8 + (0xc * 0x1) -#define TMU2_BASE tmu_base + 0x8 + (0xc * 0x2) - -#define TMU_TOCR tmu_base+0x0 /* Byte access */ -#define TMU_TSTR tmu_base+0x4 /* Byte access */ - -#define TMU0_TCOR TMU0_BASE+0x0 /* Long access */ -#define TMU0_TCNT TMU0_BASE+0x4 /* Long access */ -#define TMU0_TCR TMU0_BASE+0x8 /* Word access */ - -#define TICK_SIZE (tick_nsec / 1000) - -static unsigned long tmu_base; - -/* Variables to allow interpolation of time of day to resolution better than a - * jiffy. */ - -/* This is effectively protected by xtime_lock */ -static unsigned long ctc_last_interrupt; -static unsigned long long usecs_per_jiffy = 1000000/HZ; /* Approximation */ - -#define CTC_JIFFY_SCALE_SHIFT 40 - -/* 2**CTC_JIFFY_SCALE_SHIFT / ctc_ticks_per_jiffy */ -static unsigned long long scaled_recip_ctc_ticks_per_jiffy; - -/* Estimate number of microseconds that have elapsed since the last timer tick, - by scaling the delta that has occurred in the CTC register. - - WARNING WARNING WARNING : This algorithm relies on the CTC decrementing at - the CPU clock rate. If the CPU sleeps, the CTC stops counting. Bear this - in mind if enabling SLEEP_WORKS in process.c. In that case, this algorithm - probably needs to use TMU.TCNT0 instead. This will work even if the CPU is - sleeping, though will be coarser. - - FIXME : What if usecs_per_tick is moving around too much, e.g. if an adjtime - is running or if the freq or tick arguments of adjtimex are modified after - we have calibrated the scaling factor? This will result in either a jump at - the end of a tick period, or a wrap backwards at the start of the next one, - if the application is reading the time of day often enough. I think we - ought to do better than this. For this reason, usecs_per_jiffy is left - separated out in the calculation below. This allows some future hook into - the adjtime-related stuff in kernel/timer.c to remove this hazard. - -*/ - -static unsigned long usecs_since_tick(void) -{ - unsigned long long current_ctc; - long ctc_ticks_since_interrupt; - unsigned long long ull_ctc_ticks_since_interrupt; - unsigned long result; - - unsigned long long mul1_out; - unsigned long long mul1_out_high; - unsigned long long mul2_out_low, mul2_out_high; - - /* Read CTC register */ - asm ("getcon cr62, %0" : "=r" (current_ctc)); - /* Note, the CTC counts down on each CPU clock, not up. - Note(2), use long type to get correct wraparound arithmetic when - the counter crosses zero. */ - ctc_ticks_since_interrupt = (long) ctc_last_interrupt - (long) current_ctc; - ull_ctc_ticks_since_interrupt = (unsigned long long) ctc_ticks_since_interrupt; - - /* Inline assembly to do 32x32x32->64 multiplier */ - asm volatile ("mulu.l %1, %2, %0" : - "=r" (mul1_out) : - "r" (ull_ctc_ticks_since_interrupt), "r" (usecs_per_jiffy)); - - mul1_out_high = mul1_out >> 32; - - asm volatile ("mulu.l %1, %2, %0" : - "=r" (mul2_out_low) : - "r" (mul1_out), "r" (scaled_recip_ctc_ticks_per_jiffy)); - -#if 1 - asm volatile ("mulu.l %1, %2, %0" : - "=r" (mul2_out_high) : - "r" (mul1_out_high), "r" (scaled_recip_ctc_ticks_per_jiffy)); -#endif - - result = (unsigned long) (((mul2_out_high << 32) + mul2_out_low) >> CTC_JIFFY_SCALE_SHIFT); - - return result; -} - -u32 arch_gettimeoffset(void) -{ - return usecs_since_tick() * 1000; -} - -/* Dummy RTC ops */ -static void null_rtc_get_time(struct timespec *tv) -{ - tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0); - tv->tv_nsec = 0; -} - -static int null_rtc_set_time(const time_t secs) -{ - return 0; -} - -void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time; -int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time; - -/* last time the RTC clock got updated */ -static long last_rtc_update; - -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick - */ -static inline void do_timer_interrupt(void) -{ - unsigned long long current_ctc; - - if (current->pid) - profile_tick(CPU_PROFILING); - - /* - * Here we are in the timer irq handler. We just have irqs locally - * disabled but we don't know if the timer_bh is running on the other - * CPU. We need to avoid to SMP race with it. NOTE: we don' t need - * the irq version of write_lock because as just said we have irq - * locally disabled. -arca - */ - write_seqlock(&xtime_lock); - asm ("getcon cr62, %0" : "=r" (current_ctc)); - ctc_last_interrupt = (unsigned long) current_ctc; - - do_timer(1); - - /* - * If we have an externally synchronized Linux clock, then update - * RTC clock accordingly every ~11 minutes. Set_rtc_mmss() has to be - * called as close as possible to 500 ms before the new second starts. - */ - if (ntp_synced() && - xtime.tv_sec > last_rtc_update + 660 && - (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 && - (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) { - if (rtc_sh_set_time(xtime.tv_sec) == 0) - last_rtc_update = xtime.tv_sec; - else - /* do it again in 60 s */ - last_rtc_update = xtime.tv_sec - 600; - } - write_sequnlock(&xtime_lock); - -#ifndef CONFIG_SMP - update_process_times(user_mode(get_irq_regs())); -#endif -} - -/* - * This is the same as the above, except we _also_ save the current - * Time Stamp Counter value at the time of the timer interrupt, so that - * we later on can estimate the time of day more exactly. - */ -static irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - unsigned long timer_status; - - /* Clear UNF bit */ - timer_status = ctrl_inw(TMU0_TCR); - timer_status &= ~0x100; - ctrl_outw(timer_status, TMU0_TCR); - - do_timer_interrupt(); - - return IRQ_HANDLED; -} - -static struct irqaction irq0 = { - .handler = timer_interrupt, - .flags = IRQF_DISABLED, - .name = "timer", -}; - -void __init time_init(void) -{ - unsigned long interval; - struct clk *clk; - - tmu_base = (unsigned long)ioremap_nocache(TMU_BASE, 1024); - if (!tmu_base) { - panic("Unable to remap TMU\n"); - } - - clk = clk_get(NULL, "cpu_clk"); - scaled_recip_ctc_ticks_per_jiffy = ((1ULL << CTC_JIFFY_SCALE_SHIFT) / - (unsigned long long)(clk_get_rate(clk) / HZ)); - - rtc_sh_get_time(&xtime); - - setup_irq(TIMER_IRQ, &irq0); - - clk = clk_get(NULL, "module_clk"); - interval = (clk_get_rate(clk)/(HZ*4)); - - printk("Interval = %ld\n", interval); - - /* Start TMU0 */ - ctrl_outb(TMU_TSTR_OFF, TMU_TSTR); - ctrl_outb(TMU_TOCR_INIT, TMU_TOCR); - ctrl_outw(TMU0_TCR_INIT, TMU0_TCR); - ctrl_outl(interval, TMU0_TCOR); - ctrl_outl(interval, TMU0_TCNT); - ctrl_outb(TMU_TSTR_INIT, TMU_TSTR); -} |