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  1. if { [info exists CHIPNAME] } {
  2. set _CHIPNAME $CHIPNAME
  3. } else {
  4. set _CHIPNAME pic32mx
  5. }
  6. if { [info exists ENDIAN] } {
  7. set _ENDIAN $ENDIAN
  8. } else {
  9. set _ENDIAN little
  10. }
  11. if { [info exists CPUTAPID ] } {
  12. set _CPUTAPID $CPUTAPID
  13. } else {
  14. # force an error till we get a good number
  15. set _CPUTAPID 0x30938053
  16. }
  17. # default working area is 16384
  18. if { [info exists WORKAREASIZE] } {
  19. set _WORKAREASIZE $WORKAREASIZE
  20. } else {
  21. set _WORKAREASIZE 0x4000
  22. }
  23. adapter_nsrst_delay 100
  24. jtag_ntrst_delay 100
  25. #jtag scan chain
  26. #format L IRC IRCM IDCODE (Length, IR Capture, IR Capture Mask, IDCODE)
  27. jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_CPUTAPID
  28. set _TARGETNAME $_CHIPNAME.cpu
  29. target create $_TARGETNAME mips_m4k -endian $_ENDIAN -chain-position $_TARGETNAME
  30. #
  31. # At reset the pic32mx does not allow code execution from RAM
  32. # we have to setup the BMX registers to allow this.
  33. # One limitation is that we loose the first 2k of RAM.
  34. #
  35. global _PIC32MX_DATASIZE
  36. global _PIC32MX_PROGSIZE
  37. set _PIC32MX_DATASIZE 0x800
  38. set _PIC32MX_PROGSIZE [expr ($_WORKAREASIZE - $_PIC32MX_DATASIZE)]
  39. $_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size $_PIC32MX_PROGSIZE -work-area-backup 0
  40. $_TARGETNAME configure -event reset-init {
  41. #
  42. # from reset the pic32 cannot execute code in ram - enable ram execution
  43. # minimum offset from start of ram is 2k
  44. #
  45. global _PIC32MX_DATASIZE
  46. global _PIC32MX_PROGSIZE
  47. # BMXCON
  48. mww 0xbf882000 0x001f0040
  49. # BMXDKPBA: 2k kernel data @ 0xa0000800
  50. mww 0xbf882010 $_PIC32MX_DATASIZE
  51. # BMXDUDBA: 16k kernel program @ 0xa0000800
  52. mww 0xbf882020 $_PIC32MX_PROGSIZE
  53. # BMXDUPBA: 0k user program
  54. mww 0xbf882030 $_PIC32MX_PROGSIZE
  55. }
  56. set _FLASHNAME $_CHIPNAME.flash0
  57. flash bank $_FLASHNAME pic32mx 0x1fc00000 0 0 0 $_TARGETNAME
  58. # add virtual banks for kseg0 and kseg1
  59. flash bank vbank0 virtual 0xbfc00000 0 0 0 $_TARGETNAME $_FLASHNAME
  60. flash bank vbank1 virtual 0x9fc00000 0 0 0 $_TARGETNAME $_FLASHNAME
  61. set _FLASHNAME $_CHIPNAME.flash1
  62. flash bank $_FLASHNAME pic32mx 0x1d000000 0 0 0 $_TARGETNAME
  63. # add virtual banks for kseg0 and kseg1
  64. flash bank vbank2 virtual 0xbd000000 0 0 0 $_TARGETNAME $_FLASHNAME
  65. flash bank vbank3 virtual 0x9d000000 0 0 0 $_TARGETNAME $_FLASHNAME