debug-macro.S 1.4 KB

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  1. /* linux/include/asm-arm/arch-sa1100/debug-macro.S
  2. *
  3. * Debugging macro include header
  4. *
  5. * Copyright (C) 1994-1999 Russell King
  6. * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
  7. *
  8. * This program is free software; you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License version 2 as
  10. * published by the Free Software Foundation.
  11. *
  12. */
  13. #include <asm/hardware.h>
  14. .macro addruart,rx
  15. mrc p15, 0, \rx, c1, c0
  16. tst \rx, #1 @ MMU enabled?
  17. moveq \rx, #0x80000000 @ physical base address
  18. movne \rx, #0xf8000000 @ virtual address
  19. @ We probe for the active serial port here, coherently with
  20. @ the comment in include/asm-arm/arch-sa1100/uncompress.h.
  21. @ We assume r1 can be clobbered.
  22. @ see if Ser3 is active
  23. add \rx, \rx, #0x00050000
  24. ldr r1, [\rx, #UTCR3]
  25. tst r1, #UTCR3_TXE
  26. @ if Ser3 is inactive, then try Ser1
  27. addeq \rx, \rx, #(0x00010000 - 0x00050000)
  28. ldreq r1, [\rx, #UTCR3]
  29. tsteq r1, #UTCR3_TXE
  30. @ if Ser1 is inactive, then try Ser2
  31. addeq \rx, \rx, #(0x00030000 - 0x00010000)
  32. ldreq r1, [\rx, #UTCR3]
  33. tsteq r1, #UTCR3_TXE
  34. @ if all ports are inactive, then there is nothing we can do
  35. moveq pc, lr
  36. .endm
  37. .macro senduart,rd,rx
  38. str \rd, [\rx, #UTDR]
  39. .endm
  40. .macro waituart,rd,rx
  41. 1001: ldr \rd, [\rx, #UTSR1]
  42. tst \rd, #UTSR1_TNF
  43. beq 1001b
  44. .endm
  45. .macro busyuart,rd,rx
  46. 1001: ldr \rd, [\rx, #UTSR1]
  47. tst \rd, #UTSR1_TBY
  48. bne 1001b
  49. .endm