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>
36 lines
907 B
INI
36 lines
907 B
INI
# Found on the 'TinCanTools' Hammer board.
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if { [info exists CHIPNAME] } {
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set _CHIPNAME $CHIPNAME
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} else {
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set _CHIPNAME s3c2410
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}
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if { [info exists ENDIAN] } {
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set _ENDIAN $ENDIAN
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} else {
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# This config file was defaulting to big endian..
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set _ENDIAN little
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}
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if { [info exists CPUTAPID] } {
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set _CPUTAPID $CPUTAPID
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} else {
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set _CPUTAPID 0xffffffff
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}
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#use combined on interfaces or targets that cannot set TRST/SRST separately
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reset_config trst_and_srst
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#jtag scan chain
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jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
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set _TARGETNAME $_CHIPNAME.cpu
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target create $_TARGETNAME arm920t -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm920t
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$_TARGETNAME configure -work-area-phys 0x30800000 -work-area-size 0x20000 -work-area-backup 0
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# speed up memory downloads
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arm7_9 fast_memory_access enable
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arm7_9 dcc_downloads enable
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