irq.c 1.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
  4. */
  5. #include <linux/interrupt.h>
  6. #include <linux/irqchip.h>
  7. #include <asm/mach_desc.h>
  8. #include <asm/smp.h>
  9. /*
  10. * Late Interrupt system init called from start_kernel for Boot CPU only
  11. *
  12. * Since slab must already be initialized, platforms can start doing any
  13. * needed request_irq( )s
  14. */
  15. void __init init_IRQ(void)
  16. {
  17. /*
  18. * process the entire interrupt tree in one go
  19. * Any external intc will be setup provided DT chains them
  20. * properly
  21. */
  22. irqchip_init();
  23. #ifdef CONFIG_SMP
  24. /* a SMP H/w block could do IPI IRQ request here */
  25. if (plat_smp_ops.init_per_cpu)
  26. plat_smp_ops.init_per_cpu(smp_processor_id());
  27. #endif
  28. if (machine_desc->init_per_cpu)
  29. machine_desc->init_per_cpu(smp_processor_id());
  30. }
  31. /*
  32. * "C" Entry point for any ARC ISR, called from low level vector handler
  33. * @irq is the vector number read from ICAUSE reg of on-chip intc
  34. */
  35. void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
  36. {
  37. handle_domain_irq(NULL, hwirq, regs);
  38. }