enum ipi_msg_type { IPI_RESCHEDULE, IPI_CALL_FUNC, IPI_CPU_STOP, IPI_CPU_CRASH_STOP, IPI_TIMER, IPI_IRQ_WORK, IPI_WAKEUP, NR_IPI}; handle_IPI是处理IPI中断的核心,代码如下: <arch/arm64/kernel/smp.c> 873 /* 874 * Main handler for inter-processor interrupts 875 */ 876 void handl...
SGI在Linux内核中通常被用作IPI中断(inter-processor interrupts). 在linux内核中,已经定义了如下的IPI中断,所以用户使用自定义的IPI中断时,建议使用8~15这些未用的中断。 //arch\arm\kernel\smp.c enum ipi_msg_type { IPI_WAKEUP, IPI_TIMER, IPI_RESCHEDULE, IPI_CALL_FUNC, IPI_CPU_STOP, IPI_IRQ_WORK...
SGI在Linux内核中通常被用作IPI中断(inter-processor interrupts). 在linux内核中,已经定义了如下的IPI中断,所以用户使用自定义的IPI中断时,建议使用8~15这些未用的中断。 //arch\arm\kernel\smp.c enum ipi_msg_type { IPI_WAKEUP, IPI_TIMER, IPI_RESCHEDULE, IPI_CALL_FUNC, IPI_CPU_STOP, IPI_IRQ_WORK...
irq_exit();break;#endif#ifdefCONFIG_IRQ_WORKcaseIPI_IRQ_WORK: irq_enter(); irq_work_run(); irq_exit();break;#endif#ifdefCONFIG_ARM64_ACPI_PARKING_PROTOCOLcaseIPI_WAKEUP: WARN_ONCE(!acpi_parking_protocol_valid(cpu),"CPU%u: Wake-up IPI outside the ACPI parking protocol\n", cpu);brea...
* Subtle. In the case of the 'never do double writes' workaround * we have to lock out interrupts to be safe. As we don't care * of the value read we use an atomic rmw access to avoid costly * cli/sti. Otherwise we use an even cheaper single atomic write ...
MPSoC是带ARM处理器和FPGA(PL)的SoC，包含4核A53及其常用外部模块（PS）。A53（PS）使用Arm GIC-400...
local_irq_enable(); __netif_receive_skb(skb); local_irq_disable(); input_queue_head_incr(sd);if(++work >=quota) { local_irq_enable();returnwork; } } rps_lock(sd); qlen= skb_queue_len(&sd->input_pkt_queue);if(qlen)
<arch/arm64/kernel/smp.c> 873 /* 874 * Main handler for inter-processor interrupts 875 */ 876 void handle_IPI(int ipinr, struct pt_regs *regs) 877 { 878 unsigned int cpu = smp_processor_id(); /*获得当前运行改代码的cpu id*/ 879 struct pt_regs *old_regs = set_irq_regs(regs)...
挂载成功后可以使用cat /proc/interrupts来查看中断是否申请成功。 驱动的部分程序如下: /* 1. 使用的软件中断号 */ #define REV_SGI_ID 14 /* 2. sgi 回调函数,由set_ipi_handler()函数在初始化时回调 */ static void ipi_kick(void) { printk("ipi_kick:%d\n",++kickcount); ...