cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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irq.h (2408B)

      1/*
      2 * This file is subject to the terms and conditions of the GNU General Public
      3 * License.  See the file "COPYING" in the main directory of this archive
      4 * for more details.
      5 *
      6 * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
      7 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
      8 */
      9#ifndef _ASM_IRQ_H
     10#define _ASM_IRQ_H
     11
     12#include <linux/linkage.h>
     13#include <linux/smp.h>
     14
     15#include <asm/mipsmtregs.h>
     16
     17#include <irq.h>
     18
     19#define IRQ_STACK_SIZE			THREAD_SIZE
     20#define IRQ_STACK_START			(IRQ_STACK_SIZE - 16)
     21
     22extern void __init init_IRQ(void);
     23extern void *irq_stack[NR_CPUS];
     24
     25/*
     26 * The highest address on the IRQ stack contains a dummy frame put down in
     27 * genex.S (handle_int & except_vec_vi_handler) which is structured as follows:
     28 *
     29 *   top ------------
     30 *       | task sp  | <- irq_stack[cpu] + IRQ_STACK_START
     31 *       ------------
     32 *       |          | <- First frame of IRQ context
     33 *       ------------
     34 *
     35 * task sp holds a copy of the task stack pointer where the struct pt_regs
     36 * from exception entry can be found.
     37 */
     38
     39static inline bool on_irq_stack(int cpu, unsigned long sp)
     40{
     41	unsigned long low = (unsigned long)irq_stack[cpu];
     42	unsigned long high = low + IRQ_STACK_SIZE;
     43
     44	return (low <= sp && sp <= high);
     45}
     46
     47#ifdef CONFIG_I8259
     48static inline int irq_canonicalize(int irq)
     49{
     50	return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq);
     51}
     52#else
     53#define irq_canonicalize(irq) (irq)	/* Sane hardware, sane code ... */
     54#endif
     55
     56asmlinkage void plat_irq_dispatch(void);
     57
     58extern void do_IRQ(unsigned int irq);
     59
     60struct irq_domain;
     61extern void do_domain_IRQ(struct irq_domain *domain, unsigned int irq);
     62
     63extern void arch_init_irq(void);
     64extern void spurious_interrupt(void);
     65
     66extern int allocate_irqno(void);
     67extern void alloc_legacy_irqno(void);
     68extern void free_irqno(unsigned int irq);
     69
     70/*
     71 * Before R2 the timer and performance counter interrupts were both fixed to
     72 * IE7.	 Since R2 their number has to be read from the c0_intctl register.
     73 */
     74#define CP0_LEGACY_COMPARE_IRQ 7
     75#define CP0_LEGACY_PERFCNT_IRQ 7
     76
     77extern int cp0_compare_irq;
     78extern int cp0_compare_irq_shift;
     79extern int cp0_perfcount_irq;
     80extern int cp0_fdc_irq;
     81
     82extern int get_c0_fdc_int(void);
     83
     84void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
     85				    bool exclude_self);
     86#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
     87
     88#endif /* _ASM_IRQ_H */