src/sys/dev/cfe, branch release/9.3.0 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F9.3.0 2012-05-13T17:04:46Z MFC r228631: kern cons: introduce infrastructure for console grabbing by 2012-05-13T17:04:46Z Andriy Gapon avg@FreeBSD.org 2012-05-13T17:04:46Z urn:sha1:33a662c963044ea3fcc5293a131e9da2abe506fe kernel Follow up to r225203 refining break-to-debugger run-time configuration 2011-08-27T14:24:27Z Robert Watson rwatson@FreeBSD.org 2011-08-27T14:24:27Z urn:sha1:e5a0927394502ac7d7d0383c523490eb35f773dc improvements: (1) Implement new model in previously missed at91 UART driver (2) Move BREAK_TO_DEBUGGER and ALT_BREAK_TO_DEBUGGER from opt_comconsole.h to opt_kdb.h (spotted by np) (3) Garbage collect now-unused opt_comconsole.h MFC after: 3 weeks Approved by: re (bz) Attempt to make break-to-debugger and alternative break-to-debugger more 2011-08-26T21:46:36Z Robert Watson rwatson@FreeBSD.org 2011-08-26T21:46:36Z urn:sha1:4cf75455890c103c9a66cb791e88998aafd4f8ce accessible: (1) Always compile in support for breaking into the debugger if options KDB is present in the kernel. (2) Disable both by default, but allow them to be enabled via tunables and sysctls debug.kdb.break_to_debugger and debug.kdb.alt_break_to_debugger. (3) options BREAK_TO_DEBUGGER and options ALT_BREAK_TO_DEBUGGER continue to behave as before -- only now instead of compiling in break-to-debugger support, they change the default values of the above sysctls to enable those features by default. Current kernel configurations should, therefore, continue to behave as expected. (4) Migrate alternative break-to-debugger state machine logic out of individual device drivers into centralised KDB code. This has a number of upsides, but also one downside: it's now tricky to release sio spin locks when entering the debugger, so we don't. However, similar logic does not exist in other device drivers, including uart. (5) dcons requires some special handling; unlike other console types, it allows overriding KDB's own debugger selection, so we need a new interface to KDB to allow that to work. GENERIC kernels in -CURRENT will now support break-to-debugger as long as appropriate boot/run-time options are set, which should improve the debuggability of BETA kernels significantly. MFC after: 3 weeks Reviewed by: kib, nwhitehorn Approved by: re (bz) Start using the 'init_static_kenv()' API provided by r198561 to initialize 2010-08-11T02:13:50Z Neel Natu neel@FreeBSD.org 2010-08-11T02:13:50Z urn:sha1:5f7eb1ff5481157ff39edbbac81c60f7dd7e4542 CFE environment variables. Create the "cfecons" tty directly using tty_makedev(). It is not clear what 2010-01-26T03:42:34Z Neel Natu neel@FreeBSD.org 2010-01-26T03:42:34Z urn:sha1:61f7c762de49f71e479b9d7c019f331f6b39d06c the intention of having two ttys pointing to the same cfe console device was. Also we were not initializing the output[] array passed in as input to tty_makedev() so one name of the ttys was garbage. Fix the code that calls cfe_write() to deal with the case where only a partial buffer is written out. cfe_cngetc() needs to return if there is no character available as input. If we don't do this then the cfe_timeout() function will spin forever because cfe_cngetc() will only ever return if there is valid input. Approved by: imp (mentor) Fix bug in cfe_enumenv(). The CFE API to invoke is CFE_CMD_ENV_ENUM 2010-01-11T17:16:06Z Warner Losh imp@FreeBSD.org 2010-01-11T17:16:06Z urn:sha1:3274f529db99cc22c9fd4e788132644fce3960ea and not CFE_CMD_ENV_SET. Submitted by: neel@ Merge from projects/mips to head by hand: 2010-01-11T03:43:18Z Warner Losh imp@FreeBSD.org 2010-01-11T03:43:18Z urn:sha1:05ace0e8706ec4cd2e49b87d4eab46441e80ac65 copy over cfe_env.c... Fix various conolse issues with cfe after MPSAFE tty. 2009-07-04T02:50:33Z Warner Losh imp@FreeBSD.org 2009-07-04T02:50:33Z urn:sha1:c72a141e817e604e2e616f5f4c3eed38194b61d1 Fix a bug with getting env on cfe... Merge in new cfe environment passing of kenv for swarm/sibyte boards. 2009-07-04T02:49:17Z Warner Losh imp@FreeBSD.org 2009-07-04T02:49:17Z urn:sha1:579c0614d5b0cbcda8d43463df30a1b209410b1f Submitted by: Neelkanth Natu Last minute TTY API change: remove mutex argument from tty_alloc(). 2009-05-29T06:41:23Z Ed Schouten ed@FreeBSD.org 2009-05-29T06:41:23Z urn:sha1:c5e30cc02b9bee4c53457d1bc4184b256ce1a569 I don't want people to override the mutex when allocating a TTY. It has to be there, to keep drivers like syscons happy. So I'm creating a tty_alloc_mutex() which can be used in those cases. tty_alloc_mutex() should eventually be removed. The advantage of this approach, is that we can just remove a function, without breaking the regular API in the future.