29f0ac0efd
Some devices, eg. The Tempest class return the wrong device class when queried. Add the ability to manually override the device class. Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
111 lines
3.4 KiB
INI
111 lines
3.4 KiB
INI
# TI/Luminary Stellaris LM3S chip family
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# Some devices have errata in returning their device class.
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# DEVICECLASS is provided as a manual override
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# Manual setting of a device class of 0xff is not allowed
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global _DEVICECLASS
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if { [info exists DEVICECLASS ] } {
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set _DEVICECLASS $DEVICECLASS
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} else {
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set _DEVICECLASS 0xff
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}
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# Luminary chips support both JTAG and SWD transports.
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# Adapt based on what transport is active.
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source [find target/swj-dp.tcl]
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# For now we ignore the SPI and UART options, which
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# are usable only for ISP style initial flash programming.
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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 lm3s
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}
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# CPU TAP ID 0x1ba00477 for early Sandstorm parts
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# CPU TAP ID 0x2ba00477 for later SandStorm parts, e.g. lm3s811 Rev C2
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# CPU TAP ID 0x3ba00477 for Cortex-M3 r1p2 (on Fury, DustDevil)
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# CPU TAP ID 0x4ba00477 for Cortex-M3 r2p0 (on Tempest)
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# ... we'll ignore the JTAG version field, rather than list every
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# chip revision that turns up.
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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 0x0ba00477
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}
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# SWD DAP, and JTAG TAP, take same params for now;
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# ... even though SWD ignores all except TAPID, and
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# JTAG shouldn't need anything more then irlen. (and TAPID).
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swj_newdap $_CHIPNAME cpu -irlen 4 -irmask 0xf \
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-expected-id $_CPUTAPID -ignore-version
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if { [info exists WORKAREASIZE ] } {
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set _WORKAREASIZE $WORKAREASIZE
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} else {
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# default to 8K working area
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set _WORKAREASIZE 0x2000
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}
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set _TARGETNAME $_CHIPNAME.cpu
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target create $_TARGETNAME cortex_m3 -chain-position $_CHIPNAME.cpu
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# 8K working area at base of ram, not backed up
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#
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# NOTE: you may need or want to reconfigure the work area;
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# some parts have just 6K, and you may want to use other
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# addresses (at end of mem not beginning) or back it up.
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$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE
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# JTAG speed ... slow enough to work with a 12 MHz RC oscillator;
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# LM3S parts don't support RTCK
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#
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# NOTE: this may be increased by a reset-init handler, after it
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# configures and enables the PLL. Or you might need to decrease
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# this, if you're using a slower clock.
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adapter_khz 500
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source [find mem_helper.tcl]
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$_TARGETNAME configure -event reset-start {
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adapter_khz 500
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#
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# When nRST is asserted on most Stellaris devices, it clears some of
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# the debug state. The ARMv7M and Cortex-M3 TRMs say that's wrong;
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# and OpenOCD depends on those TRMs. So we won't use SRST on those
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# chips. (Only power-on reset should affect debug state, beyond a
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# few specified bits; not the chip's nRST input, wired to SRST.)
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#
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# REVISIT current errata specs don't seem to cover this issue.
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# Do we have more details than this email?
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# https://lists.berlios.de/pipermail
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# /openocd-development/2008-August/003065.html
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#
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global _DEVICECLASS
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if {$_DEVICECLASS != 0xff} {
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set device_class $_DEVICECLASS
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} else {
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set device_class [expr (([mrw 0x400fe000] >> 16) & 0xff)]
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}
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if {$device_class == 0 || $device_class == 1 || $device_class == 3} {
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# Sandstorm, Fury and DustDevil are able to use NVIC SYSRESETREQ
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cortex_m3 reset_config sysresetreq
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} else {
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# Tempest and newer default to using NVIC VECTRESET
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# this does mean a reset-init event handler is required to reset
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# any peripherals
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cortex_m3 reset_config vectreset
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}
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}
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# flash configuration ... autodetects sizes, autoprobed
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flash bank $_CHIPNAME.flash stellaris 0 0 0 0 $_TARGETNAME
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