1/**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12#ifndef LINUX_HARDIRQ_H 13#define LINUX_HARDIRQ_H 14 15#include <linux/preempt.h> 16#include <linux/smp_lock.h> 17#include <linux/lockdep.h> 18#include <asm/hardirq.h> 19#include <asm/system.h> 20 21#define PREEMPT_BITS 8 22#define SOFTIRQ_BITS 8 23 24#ifndef HARDIRQ_BITS 25#define HARDIRQ_BITS 12 26 27#if 1 << HARDIRQ_BITS < NR_IRQS 28#error HARDIRQ_BITS is too low! 29#endif 30#endif 31 32#define PREEMPT_SHIFT 0 33#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS) 34#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS) 35 36#define __IRQ_MASK(x) ((1UL << (x))-1) 37 38#define PREEMPT_MASK (__IRQ_MASK(PREEMPT_BITS) << PREEMPT_SHIFT) 39#define SOFTIRQ_MASK (__IRQ_MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT) 40#define HARDIRQ_MASK (__IRQ_MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT) 41 42#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT) 43#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT) 44#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT) 45 46#if PREEMPT_ACTIVE < 1 << HARDIRQ_SHIFT + HARDIRQ_BITS 47#error PREEMPT_ACTIVE is too low! 48#endif 49 50#define hardirq_count() (preempt_count() & HARDIRQ_MASK) 51#define softirq_count() (preempt_count() & SOFTIRQ_MASK) 52#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK)) 53 54#define in_irq() (hardirq_count()) 55#define in_softirq() (softirq_count()) 56#define in_interrupt() (irq_count()) 57 58#define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != 0) 59 60#define preemptible() 0 61#define IRQ_EXIT_OFFSET HARDIRQ_OFFSET 62 63#define synchronize_irq(irq) barrier() 64 65struct task_struct; 66 67#define irq_enter() do { account_system_vtime(current); add_preempt_count(HARDIRQ_OFFSET); trace_hardirq_enter(); } while (0) 68#define __irq_exit() do { trace_hardirq_exit(); account_system_vtime(current); sub_preempt_count(HARDIRQ_OFFSET); } while (0) 69 70#define nmi_enter() do { lockdep_off(); irq_enter(); } while (0) 71#define nmi_exit() do { __irq_exit(); lockdep_on(); } while (0) 72 73#endif 74