diff options
Diffstat (limited to 'libdde_linux26/include/linux/.svn/text-base/hardirq.h.svn-base')
| -rw-r--r-- | libdde_linux26/include/linux/.svn/text-base/hardirq.h.svn-base | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/libdde_linux26/include/linux/.svn/text-base/hardirq.h.svn-base b/libdde_linux26/include/linux/.svn/text-base/hardirq.h.svn-base deleted file mode 100644 index 7a0082bd..00000000 --- a/libdde_linux26/include/linux/.svn/text-base/hardirq.h.svn-base +++ /dev/null @@ -1,183 +0,0 @@ -#ifndef LINUX_HARDIRQ_H -#define LINUX_HARDIRQ_H - -#include <linux/preempt.h> -#include <linux/smp_lock.h> -#include <linux/lockdep.h> -#include <linux/ftrace_irq.h> -#include <asm/hardirq.h> -#include <asm/system.h> - -/* - * We put the hardirq and softirq counter into the preemption - * counter. The bitmask has the following meaning: - * - * - bits 0-7 are the preemption count (max preemption depth: 256) - * - bits 8-15 are the softirq count (max # of softirqs: 256) - * - * The hardirq count can be overridden per architecture, the default is: - * - * - bits 16-27 are the hardirq count (max # of hardirqs: 4096) - * - ( bit 28 is the PREEMPT_ACTIVE flag. ) - * - * PREEMPT_MASK: 0x000000ff - * SOFTIRQ_MASK: 0x0000ff00 - * HARDIRQ_MASK: 0x0fff0000 - */ -#define PREEMPT_BITS 8 -#define SOFTIRQ_BITS 8 - -#ifndef HARDIRQ_BITS -#define HARDIRQ_BITS 12 - -#ifndef MAX_HARDIRQS_PER_CPU -#define MAX_HARDIRQS_PER_CPU NR_IRQS -#endif - -/* - * The hardirq mask has to be large enough to have space for potentially - * all IRQ sources in the system nesting on a single CPU. - */ -#if (1 << HARDIRQ_BITS) < MAX_HARDIRQS_PER_CPU -# error HARDIRQ_BITS is too low! -#endif -#endif - -#define PREEMPT_SHIFT 0 -#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS) -#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS) - -#define __IRQ_MASK(x) ((1UL << (x))-1) - -#define PREEMPT_MASK (__IRQ_MASK(PREEMPT_BITS) << PREEMPT_SHIFT) -#define SOFTIRQ_MASK (__IRQ_MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT) -#define HARDIRQ_MASK (__IRQ_MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT) - -#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT) -#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT) -#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT) - -#if PREEMPT_ACTIVE < (1 << (HARDIRQ_SHIFT + HARDIRQ_BITS)) -#error PREEMPT_ACTIVE is too low! -#endif - -#define hardirq_count() (preempt_count() & HARDIRQ_MASK) -#define softirq_count() (preempt_count() & SOFTIRQ_MASK) -#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK)) - -/* - * Are we doing bottom half or hardware interrupt processing? - * Are we in a softirq context? Interrupt context? - */ -#define in_irq() (hardirq_count()) -#define in_softirq() (softirq_count()) -#define in_interrupt() (irq_count()) - -#if defined(CONFIG_PREEMPT) -# define PREEMPT_INATOMIC_BASE kernel_locked() -# define PREEMPT_CHECK_OFFSET 1 -#else -# define PREEMPT_INATOMIC_BASE 0 -# define PREEMPT_CHECK_OFFSET 0 -#endif - -/* - * Are we running in atomic context? WARNING: this macro cannot - * always detect atomic context; in particular, it cannot know about - * held spinlocks in non-preemptible kernels. Thus it should not be - * used in the general case to determine whether sleeping is possible. - * Do not use in_atomic() in driver code. - */ -#define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_INATOMIC_BASE) - -/* - * Check whether we were atomic before we did preempt_disable(): - * (used by the scheduler, *after* releasing the kernel lock) - */ -#define in_atomic_preempt_off() \ - ((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_CHECK_OFFSET) - -#ifdef CONFIG_PREEMPT -# define preemptible() (preempt_count() == 0 && !irqs_disabled()) -# define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1) -#else -# define preemptible() 0 -# define IRQ_EXIT_OFFSET HARDIRQ_OFFSET -#endif - -#if defined(CONFIG_SMP) & !defined(DDE_LINUX) -extern void synchronize_irq(unsigned int irq); -#else /* !SMP || DDE_LINUX */ -# define synchronize_irq(irq) barrier() -#endif - -struct task_struct; - -#ifndef CONFIG_VIRT_CPU_ACCOUNTING -static inline void account_system_vtime(struct task_struct *tsk) -{ -} -#endif - -#if defined(CONFIG_NO_HZ) && !defined(CONFIG_CLASSIC_RCU) -extern void rcu_irq_enter(void); -extern void rcu_irq_exit(void); -extern void rcu_nmi_enter(void); -extern void rcu_nmi_exit(void); -#else -# define rcu_irq_enter() do { } while (0) -# define rcu_irq_exit() do { } while (0) -# define rcu_nmi_enter() do { } while (0) -# define rcu_nmi_exit() do { } while (0) -#endif /* #if defined(CONFIG_NO_HZ) && !defined(CONFIG_CLASSIC_RCU) */ - -/* - * It is safe to do non-atomic ops on ->hardirq_context, - * because NMI handlers may not preempt and the ops are - * always balanced, so the interrupted value of ->hardirq_context - * will always be restored. - */ -#define __irq_enter() \ - do { \ - account_system_vtime(current); \ - add_preempt_count(HARDIRQ_OFFSET); \ - trace_hardirq_enter(); \ - } while (0) - -/* - * Enter irq context (on NO_HZ, update jiffies): - */ -extern void irq_enter(void); - -/* - * Exit irq context without processing softirqs: - */ -#define __irq_exit() \ - do { \ - trace_hardirq_exit(); \ - account_system_vtime(current); \ - sub_preempt_count(HARDIRQ_OFFSET); \ - } while (0) - -/* - * Exit irq context and process softirqs if needed: - */ -extern void irq_exit(void); - -#define nmi_enter() \ - do { \ - ftrace_nmi_enter(); \ - lockdep_off(); \ - rcu_nmi_enter(); \ - __irq_enter(); \ - } while (0) - -#define nmi_exit() \ - do { \ - __irq_exit(); \ - rcu_nmi_exit(); \ - lockdep_on(); \ - ftrace_nmi_exit(); \ - } while (0) - -#endif /* LINUX_HARDIRQ_H */ |