From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/mips/include/asm/irq.h | 84 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 arch/mips/include/asm/irq.h (limited to 'arch/mips/include/asm/irq.h') diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h new file mode 100644 index 000000000..44f9824c1 --- /dev/null +++ b/arch/mips/include/asm/irq.h @@ -0,0 +1,84 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle + * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle + */ +#ifndef _ASM_IRQ_H +#define _ASM_IRQ_H + +#include +#include + +#include + +#include + +#define IRQ_STACK_SIZE THREAD_SIZE +#define IRQ_STACK_START (IRQ_STACK_SIZE - 16) + +extern void __init init_IRQ(void); +extern void *irq_stack[NR_CPUS]; + +/* + * The highest address on the IRQ stack contains a dummy frame put down in + * genex.S (handle_int & except_vec_vi_handler) which is structured as follows: + * + * top ------------ + * | task sp | <- irq_stack[cpu] + IRQ_STACK_START + * ------------ + * | | <- First frame of IRQ context + * ------------ + * + * task sp holds a copy of the task stack pointer where the struct pt_regs + * from exception entry can be found. + */ + +static inline bool on_irq_stack(int cpu, unsigned long sp) +{ + unsigned long low = (unsigned long)irq_stack[cpu]; + unsigned long high = low + IRQ_STACK_SIZE; + + return (low <= sp && sp <= high); +} + +#ifdef CONFIG_I8259 +static inline int irq_canonicalize(int irq) +{ + return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq); +} +#else +#define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ +#endif + +asmlinkage void plat_irq_dispatch(void); + +extern void do_IRQ(unsigned int irq); + +struct irq_domain; +extern void do_domain_IRQ(struct irq_domain *domain, unsigned int irq); + +extern void arch_init_irq(void); +extern void spurious_interrupt(void); + +/* + * Before R2 the timer and performance counter interrupts were both fixed to + * IE7. Since R2 their number has to be read from the c0_intctl register. + */ +#define CP0_LEGACY_COMPARE_IRQ 7 +#define CP0_LEGACY_PERFCNT_IRQ 7 + +extern int cp0_compare_irq; +extern int cp0_compare_irq_shift; +extern int cp0_perfcount_irq; +extern int cp0_fdc_irq; + +extern int get_c0_fdc_int(void); + +void arch_trigger_cpumask_backtrace(const struct cpumask *mask, + bool exclude_self); +#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace + +#endif /* _ASM_IRQ_H */ -- cgit v1.2.3