diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/process.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 76 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/time.c | 38 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/Makefile | 3 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/timer.c | 70 |
6 files changed, 135 insertions, 63 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 20aae16cbad..20a8fdcaacb 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -11,6 +11,11 @@ config PPC64 This option selects whether a 32-bit or a 64-bit kernel will be built. +config PPC_PM_NEEDS_RTC_LIB + bool + select RTC_LIB + default y if PM + config PPC32 bool default y if !PPC64 diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 0df04921550..d7d7602e348 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -402,11 +402,11 @@ static void printbits(unsigned long val, struct regbit *bits) } #ifdef CONFIG_PPC64 -#define REG "%016lX" +#define REG "%016lx" #define REGS_PER_LINE 4 #define LAST_VOLATILE 13 #else -#define REG "%08lX" +#define REG "%08lx" #define REGS_PER_LINE 8 #define LAST_VOLATILE 12 #endif @@ -421,7 +421,7 @@ void show_regs(struct pt_regs * regs) regs, regs->trap, print_tainted(), init_utsname()->release); printk("MSR: "REG" ", regs->msr); printbits(regs->msr, msr_bits); - printk(" CR: %08lX XER: %08lX\n", regs->ccr, regs->xer); + printk(" CR: %08lx XER: %08lx\n", regs->ccr, regs->xer); trap = TRAP(regs); if (trap == 0x300 || trap == 0x600) printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr); diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 17724fb2067..f7862224fe8 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -90,21 +90,11 @@ EXPORT_SYMBOL(unregister_die_notifier); * Trap & Exception support */ -static DEFINE_SPINLOCK(die_lock); - -int die(const char *str, struct pt_regs *regs, long err) -{ - static int die_counter; - - if (debugger(regs)) - return 1; - - console_verbose(); - spin_lock_irq(&die_lock); - bust_spinlocks(1); #ifdef CONFIG_PMAC_BACKLIGHT +static void pmac_backlight_unblank(void) +{ mutex_lock(&pmac_backlight_mutex); - if (machine_is(powermac) && pmac_backlight) { + if (pmac_backlight) { struct backlight_properties *props; props = &pmac_backlight->props; @@ -113,26 +103,67 @@ int die(const char *str, struct pt_regs *regs, long err) backlight_update_status(pmac_backlight); } mutex_unlock(&pmac_backlight_mutex); +} +#else +static inline void pmac_backlight_unblank(void) { } #endif - printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter); + +int die(const char *str, struct pt_regs *regs, long err) +{ + static struct { + spinlock_t lock; + u32 lock_owner; + int lock_owner_depth; + } die = { + .lock = __SPIN_LOCK_UNLOCKED(die.lock), + .lock_owner = -1, + .lock_owner_depth = 0 + }; + static int die_counter; + unsigned long flags; + + if (debugger(regs)) + return 1; + + oops_enter(); + + if (die.lock_owner != raw_smp_processor_id()) { + console_verbose(); + spin_lock_irqsave(&die.lock, flags); + die.lock_owner = smp_processor_id(); + die.lock_owner_depth = 0; + bust_spinlocks(1); + if (machine_is(powermac)) + pmac_backlight_unblank(); + } else { + local_save_flags(flags); + } + + if (++die.lock_owner_depth < 3) { + printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter); #ifdef CONFIG_PREEMPT - printk("PREEMPT "); + printk("PREEMPT "); #endif #ifdef CONFIG_SMP - printk("SMP NR_CPUS=%d ", NR_CPUS); + printk("SMP NR_CPUS=%d ", NR_CPUS); #endif #ifdef CONFIG_DEBUG_PAGEALLOC - printk("DEBUG_PAGEALLOC "); + printk("DEBUG_PAGEALLOC "); #endif #ifdef CONFIG_NUMA - printk("NUMA "); + printk("NUMA "); #endif - printk("%s\n", ppc_md.name ? "" : ppc_md.name); + printk("%s\n", ppc_md.name ? ppc_md.name : ""); + + print_modules(); + show_regs(regs); + } else { + printk("Recursive die() failure, output suppressed\n"); + } - print_modules(); - show_regs(regs); bust_spinlocks(0); - spin_unlock_irq(&die_lock); + die.lock_owner = -1; + spin_unlock_irqrestore(&die.lock, flags); if (kexec_should_crash(current) || kexec_sr_activated(smp_processor_id())) @@ -145,6 +176,7 @@ int die(const char *str, struct pt_regs *regs, long err) if (panic_on_oops) panic("Fatal exception"); + oops_exit(); do_exit(err); return 0; diff --git a/arch/powerpc/platforms/powermac/time.c b/arch/powerpc/platforms/powermac/time.c index a4173906e94..bf9da56942e 100644 --- a/arch/powerpc/platforms/powermac/time.c +++ b/arch/powerpc/platforms/powermac/time.c @@ -297,49 +297,11 @@ int __init via_calibrate_decr(void) } #endif -#ifdef CONFIG_PM -/* - * Reset the time after a sleep. - */ -static int -time_sleep_notify(struct pmu_sleep_notifier *self, int when) -{ - static unsigned long time_diff; - unsigned long flags; - unsigned long seq; - struct timespec tv; - - switch (when) { - case PBOOK_SLEEP_NOW: - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - time_diff = xtime.tv_sec - pmac_get_boot_time(); - } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - break; - case PBOOK_WAKE: - tv.tv_sec = pmac_get_boot_time() + time_diff; - tv.tv_nsec = 0; - do_settimeofday(&tv); - break; - } - return PBOOK_SLEEP_OK; -} - -static struct pmu_sleep_notifier time_sleep_notifier = { - time_sleep_notify, SLEEP_LEVEL_MISC, -}; -#endif /* CONFIG_PM */ - /* * Query the OF and get the decr frequency. */ void __init pmac_calibrate_decr(void) { -#if defined(CONFIG_PM) && defined(CONFIG_ADB_PMU) - /* XXX why here? */ - pmu_register_sleep_notifier(&time_sleep_notifier); -#endif - generic_calibrate_decr(); #ifdef CONFIG_PPC32 diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index 26ca3ffbc1d..e57379d22b6 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -14,6 +14,9 @@ obj-$(CONFIG_FSL_SOC) += fsl_soc.o obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o obj-$(CONFIG_QUICC_ENGINE) += qe_lib/ +# contains only the suspend handler for time +obj-$(CONFIG_PM) += timer.o + ifeq ($(CONFIG_PPC_MERGE),y) obj-$(CONFIG_PPC_I8259) += i8259.o obj-$(CONFIG_PPC_83xx) += ipic.o diff --git a/arch/powerpc/sysdev/timer.c b/arch/powerpc/sysdev/timer.c new file mode 100644 index 00000000000..bdbf8fe520e --- /dev/null +++ b/arch/powerpc/sysdev/timer.c @@ -0,0 +1,70 @@ +/* + * Common code to keep time when machine suspends. + * + * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> + * + * GPLv2 + */ + +#include <linux/time.h> +#include <asm/rtc.h> + +static unsigned long suspend_rtc_time; + +/* + * Reset the time after a sleep. + */ +static int timer_resume(struct sys_device *dev) +{ + struct timeval tv; + struct timespec ts; + struct rtc_time cur_rtc_tm; + unsigned long cur_rtc_time, diff; + + /* get current RTC time and convert to seconds */ + get_rtc_time(&cur_rtc_tm); + rtc_tm_to_time(&cur_rtc_tm, &cur_rtc_time); + + diff = cur_rtc_time - suspend_rtc_time; + + /* adjust time of day by seconds that elapsed while + * we were suspended */ + do_gettimeofday(&tv); + ts.tv_sec = tv.tv_sec + diff; + ts.tv_nsec = tv.tv_usec * NSEC_PER_USEC; + do_settimeofday(&ts); + + return 0; +} + +static int timer_suspend(struct sys_device *dev, pm_message_t state) +{ + struct rtc_time suspend_rtc_tm; + WARN_ON(!ppc_md.get_rtc_time); + + get_rtc_time(&suspend_rtc_tm); + rtc_tm_to_time(&suspend_rtc_tm, &suspend_rtc_time); + + return 0; +} + +static struct sysdev_class timer_sysclass = { + .resume = timer_resume, + .suspend = timer_suspend, + set_kset_name("timer"), +}; + +static struct sys_device device_timer = { + .id = 0, + .cls = &timer_sysclass, +}; + +static int time_init_device(void) +{ + int error = sysdev_class_register(&timer_sysclass); + if (!error) + error = sysdev_register(&device_timer); + return error; +} + +device_initcall(time_init_device); |