entry-macro.S 891 B

1234567891011121314151617181920212223242526272829303132
  1. /*
  2. * include/asm-arm/arch-imx/entry-macro.S
  3. *
  4. * Low-level IRQ helper macros for iMX-based platforms
  5. *
  6. * This file is licensed under the terms of the GNU General Public
  7. * License version 2. This program is licensed "as is" without any
  8. * warranty of any kind, whether express or implied.
  9. */
  10. #include <asm/hardware.h>
  11. .macro disable_fiq
  12. .endm
  13. .macro get_irqnr_preamble, base, tmp
  14. .endm
  15. .macro arch_ret_to_user, tmp1, tmp2
  16. .endm
  17. #define AITC_NIVECSR 0x40
  18. .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
  19. ldr \base, =IO_ADDRESS(IMX_AITC_BASE)
  20. @ Load offset & priority of the highest priority
  21. @ interrupt pending.
  22. ldr \irqstat, [\base, #AITC_NIVECSR]
  23. @ Shift off the priority leaving the offset or
  24. @ "interrupt number", use arithmetic shift to
  25. @ transform illegal source (0xffff) as -1
  26. mov \irqnr, \irqstat, asr #16
  27. adds \tmp, \irqnr, #1
  28. .endm