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authorSpencer Oliver <ntfreak@users.sourceforge.net>2010-03-15 09:36:46 +0000
committerSpencer Oliver <ntfreak@users.sourceforge.net>2010-03-15 09:38:46 +0000
commitde761e350ba8d89fab4fac6f14b1072f8369d778 (patch)
treed9a66062cb4e3c06ce414567c4b4e1c640d7b219 /tcl/target
parentc25fda2c95f130d758c7784277fe5f2693ff3dd4 (diff)
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PIC32MX: update cfg script
The default config script will now dynamically setup the BMX registers in the reset init script. This will also work if the user overrides the default working area. Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
Diffstat (limited to 'tcl/target')
-rw-r--r--tcl/target/pic32mx.cfg33
1 files changed, 23 insertions, 10 deletions
diff --git a/tcl/target/pic32mx.cfg b/tcl/target/pic32mx.cfg
index 0f1fa66..d77c3a8 100644
--- a/tcl/target/pic32mx.cfg
+++ b/tcl/target/pic32mx.cfg
@@ -18,14 +18,14 @@ if { [info exists CPUTAPID ] } {
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
} else {
- set _WORKAREASIZE [expr (16384 - 2048)]
+ set _WORKAREASIZE 0x4000
}
+
jtag_nsrst_delay 100
jtag_ntrst_delay 100
@@ -39,22 +39,35 @@ 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 $_WORKAREASIZE -work-area-backup 0
+#
+# At reset the pic32mx does not allow code execution from RAM
+# we have to setup the BMX registers to allow this.
+# One limitation is that we loose the first 2k of RAM.
+#
+
+global _PIC32MX_DATASIZE
+global _PIC32MX_PROGSIZE
+set _PIC32MX_DATASIZE 0x800
+set _PIC32MX_PROGSIZE [expr ($_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 _PIC32MX_PROGSIZE
+
# BMXCON
mww 0xbf882000 0x001f0040
- # BMXDKPBA: 0xa0000800
- mww 0xbf882010 0x00000800
- # BMXDUDBA
- mww 0xbf882020 0x00004000
- # BMXDUPBA
- mww 0xbf882030 0x00004000
+ # BMXDKPBA: 2k kernel data @ 0xa0000800
+ mww 0xbf882010 $_PIC32MX_DATASIZE
+ # BMXDUDBA: 16k kernel program @ 0xa0000800
+ mww 0xbf882020 $_PIC32MX_PROGSIZE
+ # BMXDUPBA: 0k user program
+ mww 0xbf882030 $_PIC32MX_PROGSIZE
}
set _FLASHNAME $_CHIPNAME.flash