/arch/mips/sgi-ip27/ip27-irq-glue.S

https://bitbucket.org/evzijst/gittest · Assembly · 45 lines · 31 code · 5 blank · 9 comment · 0 complexity · 00d699b9a40a6fb939fb2405b68f9d18 MD5 · raw file 

    

  1. /*
    2. 

  2.  * This file is subject to the terms and conditions of the GNU General Public
    3. 

  3.  * License.  See the file "COPYING" in the main directory of this archive
    4. 

  4.  * for more details.
    5. 

  5.  *
    6. 

  6.  * Copyright (C) 1999 Ralf Baechle
    7. 

  7.  * Copyright (C) 1999 Silicon Graphics, Inc.
    8. 

  8.  */
    9. 

  9. #include <asm/asm.h>
    10. 

  10. #include <asm/mipsregs.h>
    11. 

  11. #include <asm/regdef.h>
    12. 

  12. #include <asm/stackframe.h>
    13. 

  13. 

  14. 	.text
    15. 

  15. 	.align	5
    16. 

  16. NESTED(ip27_irq, PT_SIZE, sp)
    17. 

  17. 	SAVE_ALL
    18. 

  18. 	CLI
    19. 

  19. 

  20. 	mfc0	s0, CP0_CAUSE
    21. 

  21. 	mfc0	t0, CP0_STATUS
    22. 

  22. 	and	s0, t0
    23. 

  23. 	move	a0, sp
    24. 

  24. 	PTR_LA	ra, ret_from_irq
    25. 

  25. 

  26. 	/* First check for RT interrupt.  */
    27. 

  27. 	andi	t0, s0, CAUSEF_IP4
    28. 

  28. 	bnez	t0, ip4
    29. 

  29. 	andi	t0, s0, CAUSEF_IP2
    30. 

  30. 	bnez	t0, ip2
    31. 

  31. 	andi	t0, s0, CAUSEF_IP3
    32. 

  32. 	bnez	t0, ip3
    33. 

  33. 	andi	t0, s0, CAUSEF_IP5
    34. 

  34. 	bnez	t0, ip5
    35. 

  35. 	andi	t0, s0, CAUSEF_IP6
    36. 

  36. 	bnez	t0, ip6
    37. 

  37. 	j	ra
    38. 

  38. 

  39. ip2:	j	ip27_do_irq_mask0	# PI_INT_PEND_0 or CC_PEND_{A|B}
    40. 

  40. ip3:	j	ip27_do_irq_mask1	# PI_INT_PEND_1
    41. 

  41. ip4:	j	ip27_rt_timer_interrupt
    42. 

  42. ip5:	j	ip27_prof_timer
    43. 

  43. ip6:	j	ip27_hub_error
    44. 

  44. 

  45. 	END(ip27_irq)
    46.