X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc64%2Fkernel%2Ftime.c;h=0af3b8384e2b19ff3ad96c2cdd12ac36165f34bb;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=0374c33d4d17e2179274180c3df564a74e48fc78;hpb=ec9397bab20a628530ce3051167d3d0fcc2c1af7;p=linux-2.6.git diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c index 0374c33d4..0af3b8384 100644 --- a/arch/sparc64/kernel/time.c +++ b/arch/sparc64/kernel/time.c @@ -46,26 +46,20 @@ #include #include -spinlock_t mostek_lock = SPIN_LOCK_UNLOCKED; -spinlock_t rtc_lock = SPIN_LOCK_UNLOCKED; -unsigned long mstk48t02_regs = 0UL; +DEFINE_SPINLOCK(mostek_lock); +DEFINE_SPINLOCK(rtc_lock); +void __iomem *mstk48t02_regs = NULL; #ifdef CONFIG_PCI unsigned long ds1287_regs = 0UL; #endif extern unsigned long wall_jiffies; -u64 jiffies_64 = INITIAL_JIFFIES; - -EXPORT_SYMBOL(jiffies_64); - -static unsigned long mstk48t08_regs = 0UL; -static unsigned long mstk48t59_regs = 0UL; +static void __iomem *mstk48t08_regs; +static void __iomem *mstk48t59_regs; static int set_rtc_mmss(unsigned long); -struct sparc64_tick_ops *tick_ops; - #define TICK_PRIV_BIT (1UL << 63) #ifdef CONFIG_SMP @@ -186,7 +180,7 @@ static unsigned long tick_add_tick(unsigned long adj, unsigned long offset) return new_tick; } -static struct sparc64_tick_ops tick_operations = { +static struct sparc64_tick_ops tick_operations __read_mostly = { .init_tick = tick_init_tick, .get_tick = tick_get_tick, .get_compare = tick_get_compare, @@ -195,6 +189,8 @@ static struct sparc64_tick_ops tick_operations = { .softint_mask = 1UL << 0, }; +struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations; + static void stick_init_tick(unsigned long offset) { tick_disable_protection(); @@ -267,7 +263,7 @@ static unsigned long stick_add_compare(unsigned long adj) return new_compare; } -static struct sparc64_tick_ops stick_operations = { +static struct sparc64_tick_ops stick_operations __read_mostly = { .init_tick = stick_init_tick, .get_tick = stick_get_tick, .get_compare = stick_get_compare, @@ -284,9 +280,9 @@ static struct sparc64_tick_ops stick_operations = { * Since STICK is constantly updating, we have to access it carefully. * * The sequence we use to read is: - * 1) read low - * 2) read high - * 3) read low again, if it rolled over increment high by 1 + * 1) read high + * 2) read low + * 3) read high again, if it rolled re-read both low and high again. * * Writing STICK safely is also tricky: * 1) write low to zero @@ -299,18 +295,18 @@ static struct sparc64_tick_ops stick_operations = { static unsigned long __hbird_read_stick(void) { unsigned long ret, tmp1, tmp2, tmp3; - unsigned long addr = HBIRD_STICK_ADDR; + unsigned long addr = HBIRD_STICK_ADDR+8; - __asm__ __volatile__("ldxa [%1] %5, %2\n\t" - "add %1, 0x8, %1\n\t" - "ldxa [%1] %5, %3\n\t" + __asm__ __volatile__("ldxa [%1] %5, %2\n" + "1:\n\t" "sub %1, 0x8, %1\n\t" + "ldxa [%1] %5, %3\n\t" + "add %1, 0x8, %1\n\t" "ldxa [%1] %5, %4\n\t" "cmp %4, %2\n\t" - "blu,a,pn %%xcc, 1f\n\t" - " add %3, 1, %3\n" - "1:\n\t" - "sllx %3, 32, %3\n\t" + "bne,a,pn %%xcc, 1b\n\t" + " mov %4, %2\n\t" + "sllx %4, 32, %4\n\t" "or %3, %4, %0\n\t" : "=&r" (ret), "=&r" (addr), "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3) @@ -413,7 +409,7 @@ static unsigned long hbtick_add_compare(unsigned long adj) return val; } -static struct sparc64_tick_ops hbtick_operations = { +static struct sparc64_tick_ops hbtick_operations __read_mostly = { .init_tick = hbtick_init_tick, .get_tick = hbtick_get_tick, .get_compare = hbtick_get_compare, @@ -428,10 +424,9 @@ static struct sparc64_tick_ops hbtick_operations = { * NOTE: On SUN5 systems the ticker interrupt comes in using 2 * interrupts, one at level14 and one with softint bit 0. */ -unsigned long timer_tick_offset; -unsigned long timer_tick_compare; +unsigned long timer_tick_offset __read_mostly; -static unsigned long timer_ticks_per_nsec_quotient; +static unsigned long timer_ticks_per_nsec_quotient __read_mostly; #define TICK_SIZE (tick_nsec / 1000) @@ -441,7 +436,7 @@ static inline void timer_check_rtc(void) static long last_rtc_update; /* Determine when to update the Mostek clock. */ - if ((time_status & STA_UNSYNC) == 0 && + 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) { @@ -455,13 +450,14 @@ static inline void timer_check_rtc(void) static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) { - unsigned long ticks, pstate; + unsigned long ticks, compare, pstate; write_seqlock(&xtime_lock); do { #ifndef CONFIG_SMP profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(regs)); #endif do_timer(regs); @@ -473,14 +469,14 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) : "=r" (pstate) : "i" (PSTATE_IE)); - timer_tick_compare = tick_ops->add_compare(timer_tick_offset); + compare = tick_ops->add_compare(timer_tick_offset); ticks = tick_ops->get_tick(); /* Restore PSTATE_IE. */ __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : /* no outputs */ : "r" (pstate)); - } while (time_after_eq(ticks, timer_tick_compare)); + } while (time_after_eq(ticks, compare)); timer_check_rtc(); @@ -496,11 +492,6 @@ void timer_tick_interrupt(struct pt_regs *regs) do_timer(regs); - /* - * Only keep timer_tick_offset uptodate, but don't set TICK_CMPR. - */ - timer_tick_compare = tick_ops->get_compare() + timer_tick_offset; - timer_check_rtc(); write_sequnlock(&xtime_lock); @@ -510,7 +501,7 @@ void timer_tick_interrupt(struct pt_regs *regs) /* Kick start a stopped clock (procedure from the Sun NVRAM/hostid FAQ). */ static void __init kick_start_clock(void) { - unsigned long regs = mstk48t02_regs; + void __iomem *regs = mstk48t02_regs; u8 sec, tmp; int i, count; @@ -594,7 +585,7 @@ static void __init kick_start_clock(void) /* Return nonzero if the clock chip battery is low. */ static int __init has_low_battery(void) { - unsigned long regs = mstk48t02_regs; + void __iomem *regs = mstk48t02_regs; u8 data1, data2; spin_lock_irq(&mostek_lock); @@ -613,7 +604,7 @@ static int __init has_low_battery(void) static void __init set_system_time(void) { unsigned int year, mon, day, hour, min, sec; - unsigned long mregs = mstk48t02_regs; + void __iomem *mregs = mstk48t02_regs; #ifdef CONFIG_PCI unsigned long dregs = ds1287_regs; #else @@ -769,6 +760,7 @@ void __init clock_probe(void) strcmp(model, "mk48t59") && strcmp(model, "m5819") && strcmp(model, "m5819p") && + strcmp(model, "m5823") && strcmp(model, "ds1287")) { if (cbus != NULL) { prom_printf("clock_probe: Central bus lacks timer chip.\n"); @@ -828,10 +820,12 @@ void __init clock_probe(void) if (!strcmp(model, "ds1287") || !strcmp(model, "m5819") || - !strcmp(model, "m5819p")) { + !strcmp(model, "m5819p") || + !strcmp(model, "m5823")) { ds1287_regs = edev->resource[0].start; } else { - mstk48t59_regs = edev->resource[0].start; + mstk48t59_regs = (void __iomem *) + edev->resource[0].start; mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02; } break; @@ -849,10 +843,12 @@ try_isa_clock: } if (!strcmp(model, "ds1287") || !strcmp(model, "m5819") || - !strcmp(model, "m5819p")) { + !strcmp(model, "m5819p") || + !strcmp(model, "m5823")) { ds1287_regs = isadev->resource.start; } else { - mstk48t59_regs = isadev->resource.start; + mstk48t59_regs = (void __iomem *) + isadev->resource.start; mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02; } break; @@ -880,21 +876,24 @@ try_isa_clock: } if(model[5] == '0' && model[6] == '2') { - mstk48t02_regs = (((u64)clk_reg[0].phys_addr) | - (((u64)clk_reg[0].which_io)<<32UL)); + mstk48t02_regs = (void __iomem *) + (((u64)clk_reg[0].phys_addr) | + (((u64)clk_reg[0].which_io)<<32UL)); } else if(model[5] == '0' && model[6] == '8') { - mstk48t08_regs = (((u64)clk_reg[0].phys_addr) | - (((u64)clk_reg[0].which_io)<<32UL)); + mstk48t08_regs = (void __iomem *) + (((u64)clk_reg[0].phys_addr) | + (((u64)clk_reg[0].which_io)<<32UL)); mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02; } else { - mstk48t59_regs = (((u64)clk_reg[0].phys_addr) | - (((u64)clk_reg[0].which_io)<<32UL)); + mstk48t59_regs = (void __iomem *) + (((u64)clk_reg[0].phys_addr) | + (((u64)clk_reg[0].which_io)<<32UL)); mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02; } break; } - if (mstk48t02_regs != 0UL) { + if (mstk48t02_regs != NULL) { /* Report a low battery voltage condition. */ if (has_low_battery()) prom_printf("NVRAM: Low battery voltage!\n"); @@ -955,7 +954,7 @@ static void sparc64_start_timers(irqreturn_t (*cfunc)(int, void *, struct pt_reg int err; /* Register IRQ handler. */ - err = request_irq(build_irq(0, 0, 0UL, 0UL), cfunc, SA_STATIC_ALLOC, + err = request_irq(build_irq(0, 0, 0UL, 0UL), cfunc, 0, "timer", NULL); if (err) { @@ -1040,7 +1039,7 @@ static struct time_interpolator sparc64_cpu_interpolator = { }; /* The quotient formula is taken from the IA64 port. */ -#define SPARC64_NSEC_PER_CYC_SHIFT 30UL +#define SPARC64_NSEC_PER_CYC_SHIFT 10UL void __init time_init(void) { unsigned long clock = sparc64_init_timers(); @@ -1074,7 +1073,7 @@ unsigned long long sched_clock(void) static int set_rtc_mmss(unsigned long nowtime) { int real_seconds, real_minutes, chip_minutes; - unsigned long mregs = mstk48t02_regs; + void __iomem *mregs = mstk48t02_regs; #ifdef CONFIG_PCI unsigned long dregs = ds1287_regs; #else