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 */ 78