entry-macro.S 1.0 KB

1234567891011121314151617181920212223242526272829303132
  1. /*
  2. * include/asm-arm/arch-at91/entry-macro.S
  3. *
  4. * Copyright (C) 2003-2005 SAN People
  5. *
  6. * Low-level IRQ helper macros for AT91RM9200 platforms
  7. *
  8. * This file is licensed under the terms of the GNU General Public
  9. * License version 2. This program is licensed "as is" without any
  10. * warranty of any kind, whether express or implied.
  11. */
  12. #include <asm/hardware.h>
  13. #include <asm/arch/at91_aic.h>
  14. .macro disable_fiq
  15. .endm
  16. .macro get_irqnr_preamble, base, tmp
  17. .endm
  18. .macro arch_ret_to_user, tmp1, tmp2
  19. .endm
  20. .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
  21. ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
  22. ldr \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
  23. ldr \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)] @ read interrupt source number
  24. teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt
  25. streq \tmp, [\base, #(AT91_AIC_EOICR - AT91_AIC)] @ not going to be handled further, then ACK it now.
  26. .endm