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>
57 lines
1.3 KiB
INI
57 lines
1.3 KiB
INI
######################################
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# Target: Toshiba TMPA910
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######################################
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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 tmpa910
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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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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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# force an error till we get a good number
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set _CPUTAPID 0x07926031
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}
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#TMPA910 has following IDs:
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# CP15.0 register 0x41069265
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# CP15.1 register 0x1d152152
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# ARM core 0x07926031
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#
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jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
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#use combined on interfaces or targets that can't set TRST/SRST separately
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reset_config trst_and_srst
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jtag_nsrst_delay 20
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jtag_ntrst_delay 20
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######################
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# Target configuration
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######################
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set _TARGETNAME [format "%s.cpu" $_CHIPNAME]
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target create $_TARGETNAME arm926ejs -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm926ejs
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# built-in RAM0
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#working_area 0 0xf8004000 0x4000 nobackup
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# built-in RAM1
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#working_area 1 0xf8008000 0x4000 nobackup
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# built-in RAM2
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#working_area 2 0xf800c000 0x4000 nobackup
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# built-in RAM 0-2 48k total
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#working_area 0 0xf8004000 0xc000 nobackup
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# Internal sram1 memory
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$_TARGETNAME configure -work-area-phys 0xf8004000 -work-area-size 0xc000 \
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-work-area-backup 0
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