3e6f9e8d1e
The semantics of "-work-area-virt 0" (or phys) changed with the patch to require specifying physical or virtrual work area addresses. Specifying zero was previously a NOP. Now it means that address zero is valid. This patch addresses three related issues: - MMU-less processors should never specify work-area-virt; remove those specifications. Such processors include ARM7TDMI, Cortex-M3, and ARM966. - MMU-equipped processors *can* specify work-area-virt... but zero won't be appropriate, except in mischievous contexts (which hide null pointer exceptions). Remove those specs from those processors too. If any of those mappings is valid, someone will need to submit a patch adding it ... along with a comment saying what OS provides the mapping, and in which context. Example, say "works with Linux 2.6.30+, in kernel mode". (Note that ARM Linux doesn't map kernel memory to zero ...) - Clarify docs on that "-virt" and other work area stuff. Seems to me work-area-virt is quite problematic; not every operating system provides such static mappings; if they do, they're not in every MMU context... Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
45 lines
1.2 KiB
INI
45 lines
1.2 KiB
INI
#Marvell/Intel PXA270 Script
|
|
|
|
if { [info exists CHIPNAME] } {
|
|
set _CHIPNAME $CHIPNAME
|
|
} else {
|
|
set _CHIPNAME pxa270
|
|
}
|
|
|
|
if { [info exists ENDIAN] } {
|
|
set _ENDIAN $ENDIAN
|
|
} else {
|
|
set _ENDIAN little
|
|
}
|
|
|
|
#IDs for pxa270. Are there more?
|
|
if { [info exists CPUTAPID ] } {
|
|
set _CPUTAPID $CPUTAPID
|
|
} else {
|
|
# set useful default
|
|
set _CPUTAPID 0x49265013
|
|
}
|
|
|
|
if { [info exists CPUTAPID2 ] } {
|
|
set _CPUTAPID2 $CPUTAPID2
|
|
} else {
|
|
# set useful default
|
|
set _CPUTAPID2 0x79265013
|
|
}
|
|
|
|
|
|
# set jtag_nsrst_delay to the delay introduced by your reset circuit
|
|
# the rest of the needed delays are built into the openocd program
|
|
jtag_nsrst_delay 260
|
|
# set the jtag_ntrst_delay to the delay introduced by a reset circuit
|
|
# the rest of the needed delays are built into the openocd program
|
|
jtag_ntrst_delay 250
|
|
|
|
set _TARGETNAME $_CHIPNAME.cpu
|
|
jtag newtap $_CHIPNAME cpu -irlen 7 -ircapture 0x1 -irmask 0x7f -expected-id $_CPUTAPID -expected-id $_CPUTAPID2
|
|
|
|
target create $_TARGETNAME xscale -endian $_ENDIAN -chain-position $_TARGETNAME -variant pxa27x
|
|
# maps to PXA internal RAM. If you are using a PXA255
|
|
# you must initialize SDRAM or leave this option off
|
|
$_TARGETNAME configure -work-area-phys 0x5c000000 -work-area-size 0x10000 -work-area-backup 0
|