5135d875e1
We need a mechanism to let an inbound CPU signal that it is alive before even getting into the kernel environment i.e. from early assembly code. Using an IPI is the simplest way to achieve that. This adds some basic infrastructure to register a struct completion pointer to be "completed" when the dedicated IPI for this task is received. Signed-off-by: Nicolas Pitre <nico@linaro.org>
33 lines
709 B
C
33 lines
709 B
C
#ifndef __ASM_HARDIRQ_H
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#define __ASM_HARDIRQ_H
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#include <linux/cache.h>
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#include <linux/threads.h>
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#include <asm/irq.h>
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#define NR_IPI 7
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typedef struct {
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unsigned int __softirq_pending;
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#ifdef CONFIG_SMP
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unsigned int ipi_irqs[NR_IPI];
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#endif
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} ____cacheline_aligned irq_cpustat_t;
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#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
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#define __inc_irq_stat(cpu, member) __IRQ_STAT(cpu, member)++
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#define __get_irq_stat(cpu, member) __IRQ_STAT(cpu, member)
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#ifdef CONFIG_SMP
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u64 smp_irq_stat_cpu(unsigned int cpu);
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#else
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#define smp_irq_stat_cpu(cpu) 0
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#endif
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#define arch_irq_stat_cpu smp_irq_stat_cpu
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#define __ARCH_IRQ_EXIT_IRQS_DISABLED 1
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#endif /* __ASM_HARDIRQ_H */
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