4 #define IRQ_STACK_SIZE THREAD_SIZE
5 #define IRQ_STACK_START_SP THREAD_START_SP
9 #include <linux/percpu.h>
11 #include <asm-generic/irq.h>
12 #include <asm/thread_info.h>
14 #define __ARCH_HAS_DO_SOFTIRQ
18 DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack);
21 * The highest address on the stack, and the first to be used. Used to
22 * find the dummy-stack frame put down by el?_irq() in entry.S, which
23 * is structured as follows:
26 * | | <- irq_stack_ptr
30 * | x29 | <- irq_stack_ptr - 0x10
34 * | x19 | <- irq_stack_ptr - 0x20
37 * where x19 holds a copy of the task stack pointer.
40 #define IRQ_STACK_PTR(cpu) ((unsigned long)per_cpu(irq_stack, cpu) + IRQ_STACK_START_SP)
43 * The offset from irq_stack_ptr where entry.S will store the original
44 * stack pointer. Used by unwind_frame() and dump_backtrace().
46 #define IRQ_STACK_TO_TASK_STACK(ptr) *((unsigned long *)(ptr - 0x20));
48 extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
50 static inline int nr_legacy_irqs(void)
55 static inline bool on_irq_stack(unsigned long sp, int cpu)
57 /* variable names the same as kernel/stacktrace.c */
58 unsigned long low = (unsigned long)per_cpu(irq_stack, cpu);
59 unsigned long high = low + IRQ_STACK_START_SP;
61 return (low <= sp && sp <= high);
64 #endif /* !__ASSEMBLER__ */