mirror of
git://git.code.sf.net/p/openocd/code
synced 2025-07-19 23:36:13 +10:00
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>
43 lines
871 B
INI
43 lines
871 B
INI
# script for ATMEL sam3, a CORTEX-M3 chip
|
|
#
|
|
# at91sam3u4e
|
|
# at91sam3u2e
|
|
# at91sam3u1e
|
|
# at91sam3u4c
|
|
# at91sam3u2c
|
|
# at91sam3u1c
|
|
|
|
if { [info exists CHIPNAME] } {
|
|
set _CHIPNAME $CHIPNAME
|
|
} else {
|
|
set _CHIPNAME sam3
|
|
}
|
|
|
|
if { [info exists ENDIAN] } {
|
|
set _ENDIAN $ENDIAN
|
|
} else {
|
|
set _ENDIAN little
|
|
}
|
|
|
|
|
|
#jtag scan chain
|
|
if { [info exists CPUTAPID ] } {
|
|
set _CPUTAPID $CPUTAPID
|
|
} else {
|
|
set _CPUTAPID 0x4ba00477
|
|
}
|
|
|
|
jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
|
|
|
|
set _TARGETNAME $_CHIPNAME.cpu
|
|
target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position $_TARGETNAME
|
|
|
|
# 16K is plenty, the smallest chip has this much
|
|
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 16384 -work-area-backup 0
|
|
|
|
reset_config srst_only
|
|
|
|
$_TARGETNAME configure -event gdb-flash-erase-start {
|
|
halt
|
|
}
|