arch/arm64/include/asm/hardirq.h

   1 /*
   2  * Copyright (C) 2012 ARM Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __ASM_HARDIRQ_H
  17 #define __ASM_HARDIRQ_H
  18
  19 #include <linux/cache.h>
  20 #include <linux/percpu.h>
  21 #include <linux/threads.h>
  22 #include <asm/barrier.h>
  23 #include <asm/irq.h>
  24 #include <asm/kvm_arm.h>
  25 #include <asm/sysreg.h>
  26
  27 #define NR_IPI  7
  28
  29 typedef struct {
  30         unsigned int __softirq_pending;
  31         unsigned int ipi_irqs[NR_IPI];
  32 } ____cacheline_aligned irq_cpustat_t;
  33
  34 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  35
  36 #define __inc_irq_stat(cpu, member)     __IRQ_STAT(cpu, member)++
  37 #define __get_irq_stat(cpu, member)     __IRQ_STAT(cpu, member)
  38
  39 u64 smp_irq_stat_cpu(unsigned int cpu);
  40 #define arch_irq_stat_cpu       smp_irq_stat_cpu
  41
  42 #define __ARCH_IRQ_EXIT_IRQS_DISABLED   1
  43
  44 struct nmi_ctx {
  45         u64 hcr;
  46 };
  47
  48 DECLARE_PER_CPU(struct nmi_ctx, nmi_contexts);
  49
  50 #define arch_nmi_enter()                                                        \
  51         do {                                                                    \
  52                 if (is_kernel_in_hyp_mode()) {                                  \
  53                         struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts);  \
  54                         nmi_ctx->hcr = read_sysreg(hcr_el2);                    \
  55                         if (!(nmi_ctx->hcr & HCR_TGE)) {                        \
  56                                 write_sysreg(nmi_ctx->hcr | HCR_TGE, hcr_el2);  \
  57                                 isb();                                          \
  58                         }                                                       \
  59                 }                                                               \
  60         } while (0)
  61
  62 #define arch_nmi_exit()                                                         \
  63         do {                                                                    \
  64                 if (is_kernel_in_hyp_mode()) {                                  \
  65                         struct nmi_ctx *nmi_ctx = this_cpu_ptr(&nmi_contexts);  \
  66                         if (!(nmi_ctx->hcr & HCR_TGE))                          \
  67                                 write_sysreg(nmi_ctx->hcr, hcr_el2);            \
  68                 }                                                               \
  69         } while (0)
  70
  71 static inline void ack_bad_irq(unsigned int irq)
  72 {
  73         extern unsigned long irq_err_count;
  74         irq_err_count++;
  75 }
  76
  77 #endif /* __ASM_HARDIRQ_H */