/arch/x86/include/asm/irq_remapping.h

https://bitbucket.org/ndreys/linux-sunxi · C++ Header · 41 lines · 30 code · 4 blank · 7 comment · 1 complexity · bde8475e4bad7e55e6211afce5b272f1 MD5 · raw file 

    

  1. #ifndef _ASM_X86_IRQ_REMAPPING_H
    2. 

  2. #define _ASM_X86_IRQ_REMAPPING_H
    3. 

  3. 

  4. #define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
    5. 

  5. 

  6. #ifdef CONFIG_INTR_REMAP
    7. 

  7. static inline void prepare_irte(struct irte *irte, int vector,
    8. 

  8. 			        unsigned int dest)
    9. 

  9. {
    10. 

  10. 	memset(irte, 0, sizeof(*irte));
    11. 

  11. 

  12. 	irte->present = 1;
    13. 

  13. 	irte->dst_mode = apic->irq_dest_mode;
    14. 

  14. 	/*
    15. 

  15. 	 * Trigger mode in the IRTE will always be edge, and for IO-APIC, the
    16. 

  16. 	 * actual level or edge trigger will be setup in the IO-APIC
    17. 

  17. 	 * RTE. This will help simplify level triggered irq migration.
    18. 

  18. 	 * For more details, see the comments (in io_apic.c) explainig IO-APIC
    19. 

  19. 	 * irq migration in the presence of interrupt-remapping.
    20. 

  20. 	*/
    21. 

  21. 	irte->trigger_mode = 0;
    22. 

  22. 	irte->dlvry_mode = apic->irq_delivery_mode;
    23. 

  23. 	irte->vector = vector;
    24. 

  24. 	irte->dest_id = IRTE_DEST(dest);
    25. 

  25. 	irte->redir_hint = 1;
    26. 

  26. }
    27. 

  27. static inline bool irq_remapped(struct irq_cfg *cfg)
    28. 

  28. {
    29. 

  29. 	return cfg->irq_2_iommu.iommu != NULL;
    30. 

  30. }
    31. 

  31. #else
    32. 

  32. static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
    33. 

  33. {
    34. 

  34. }
    35. 

  35. static inline bool irq_remapped(struct irq_cfg *cfg)
    36. 

  36. {
    37. 

  37. 	return false;
    38. 

  38. }
    39. 

  39. #endif
    40. 

  40. 

  41. #endif	/* _ASM_X86_IRQ_REMAPPING_H */
    42.