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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>
__archive__
Spencer Oliver 2010-03-15 09:36:46 +00:00
parent c25fda2c95
commit de761e350b
1 changed files with 23 additions and 10 deletions
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33
tcl/target/pic32mx.cfg
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@ -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