Pic32mx.cfg: Change system clock to 8Mhz after reset-init.

[openocd.git] / tcl / target / pic32mx.cfg

diff --git a/tcl/target/pic32mx.cfg b/tcl/target/pic32mx.cfg
index 0f1fa66c0548ddcec33c4add04cebdd9b3aaf5e8..8a8eea0ebc54660873a3fe8d021b0656f3d71974 100644 (file)
--- a/tcl/target/pic32mx.cfg
+++ b/tcl/target/pic32mx.cfg
@@ -1,37 +1,31 @@
-
 if { [info exists CHIPNAME] } {
-   set  _CHIPNAME $CHIPNAME
+   set _CHIPNAME $CHIPNAME
 } else {
-   set  _CHIPNAME pic32mx
+   set _CHIPNAME pic32mx
 }
 
 if { [info exists ENDIAN] } {
-   set  _ENDIAN $ENDIAN
+   set _ENDIAN $ENDIAN
 } else {
-   set  _ENDIAN little
+   set _ENDIAN little
 }
 
-if { [info exists CPUTAPID ] } {
+if { [info exists CPUTAPID] } {
    set _CPUTAPID $CPUTAPID
 } else {
-  # force an error till we get a good number
    set _CPUTAPID 0x30938053
 }
 
-# working area is 16384 - 2048
-# loose first 2048 bytes due to BMXDKPBA reg
+# default working area is 16384
 if { [info exists WORKAREASIZE] } {
-   set  _WORKAREASIZE $WORKAREASIZE
+   set _WORKAREASIZE $WORKAREASIZE
 } else {
-   set  _WORKAREASIZE [expr (16384 - 2048)]
+   set _WORKAREASIZE 0x4000
 }
 
-jtag_nsrst_delay 100
+adapter_nsrst_delay 100
 jtag_ntrst_delay 100
 
-#use combined on interfaces or targets that can't set TRST/SRST separately
-reset_config srst_only
-
 #jtag scan chain
 #format L IRC IRCM IDCODE (Length, IR Capture, IR Capture Mask, IDCODE)
 jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_CPUTAPID
@@ -39,28 +33,59 @@ jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_C
 set _TARGETNAME $_CHIPNAME.cpu
 target create $_TARGETNAME mips_m4k -endian $_ENDIAN -chain-position $_TARGETNAME
 
-$_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size $_WORKAREASIZE -work-area-backup 0
+#
+# At reset the pic32mx does not allow code execution from RAM
+# we have to setup the BMX registers to allow this.
+# One limitation is that we loose the first 2k of RAM.
+#
+
+global _PIC32MX_DATASIZE
+global _WORKAREASIZE
+set _PIC32MX_DATASIZE 0x800
+set _PIC32MX_PROGSIZE [expr ($_WORKAREASIZE - $_PIC32MX_DATASIZE)]
 
+$_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size $_PIC32MX_PROGSIZE -work-area-backup 0
 $_TARGETNAME configure -event reset-init {
        #
        # from reset the pic32 cannot execute code in ram - enable ram execution
        # minimum offset from start of ram is 2k
        #
 
+       global _PIC32MX_DATASIZE
+       global _WORKAREASIZE
+
        # BMXCON
        mww 0xbf882000 0x001f0040
-       # BMXDKPBA: 0xa0000800
-       mww 0xbf882010 0x00000800
-       # BMXDUDBA
-       mww 0xbf882020 0x00004000
-       # BMXDUPBA
-       mww 0xbf882030 0x00004000
+       # BMXDKPBA: 2k kernel data @ 0xa0000000
+       mww 0xbf882010 $_PIC32MX_DATASIZE
+       # BMXDUDBA: 14k kernel program @ 0xa0000800 - (BMXDUDBA - BMXDKPBA)
+       mww 0xbf882020 $_WORKAREASIZE
+       # BMXDUPBA: 0k user program - (BMXDUPBA - BMXDUDBA)
+       mww 0xbf882030 $_WORKAREASIZE
+
+       #
+       # Set system clock to 8Mhz if the default clock configuration is set
+       #
+
+       # SYSKEY register, make sure OSCCON is locked
+       mww 0xbf80f230 0x0
+       # SYSKEY register, write unlock sequence
+       mww 0xbf80f230 0xaa996655
+       mww 0xbf80f230 0x556699aa
+       # OSCCON register + 4, clear OSCCON FRCDIV bits: 24, 25 and 26, divided by 1
+       mww 0xbf80f004 0x07000000
+       # SYSKEY register, relock OSCCON
+       mww 0xbf80f230 0x0
 }
 
-set _FLASHNAME $_CHIPNAME.flash
+set _FLASHNAME $_CHIPNAME.flash0
 flash bank $_FLASHNAME pic32mx 0x1fc00000 0 0 0 $_TARGETNAME
-set _FLASHNAME $_CHIPNAME.flash
-flash bank $_FLASHNAME pic32mx 0x1d000000 0 0 0 $_TARGETNAME
+# add virtual banks for kseg0 and kseg1
+flash bank vbank0 virtual 0xbfc00000 0 0 0 $_TARGETNAME $_FLASHNAME
+flash bank vbank1 virtual 0x9fc00000 0 0 0 $_TARGETNAME $_FLASHNAME
 
-# For more information about the configuration files, take a look at:
-# openocd.texi
+set _FLASHNAME $_CHIPNAME.flash1
+flash bank $_FLASHNAME pic32mx 0x1d000000 0 0 0 $_TARGETNAME
+# add virtual banks for kseg0 and kseg1
+flash bank vbank2 virtual 0xbd000000 0 0 0 $_TARGETNAME $_FLASHNAME
+flash bank vbank3 virtual 0x9d000000 0 0 0 $_TARGETNAME $_FLASHNAME