summaryrefslogtreecommitdiff
path: root/src/include/cpu/x86/tsc.h
AgeCommit message (Collapse)Author
2012-08-09Synchronize rdtsc instructionsStefan Reinauer
The CPU can arbitrarily reorder calls to rdtsc, significantly reducing the precision of timing using the CPUs time stamp counter. Unfortunately the method of synchronizing rdtsc is different on AMD and Intel CPUs. There is a generic method, using the cpuid instruction, but that uses up a lot of registers, and is very slow. Hence, use the correct lfence/mfence instructions (for CPUs that we know support it) Change-Id: I17ecb48d283f38f23148c13159aceda704c64ea5 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/1422 Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Tested-by: build bot (Jenkins)
2010-03-28drop unneeded __ROMCC__ checks when the check for __PRE_RAM__ is moreStefan Reinauer
appropriate. Also, factor out post_code() for __PRE_RAM__ code and drop it from some mainboards. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5307 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2010-03-17fix a couple of warningsStefan Reinauer
Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5236 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2010-02-22This is a general cleanup patchStefan Reinauer
- drop include/part and move files to include/ - get rid lots of warnings - make resource allocator happy with w83627thg - trivial cbmem resume fix - fix payload and log level settings in abuild - fix kontron mptable for virtual wire mode - drop some dead includes and dead code. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Ronald G. Minnich <rminnich@gmail.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5136 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2009-11-06Split the two usages of __ROMCC__:Myles Watson
__ROMCC__ now means "Don't use prototypes, since romcc doesn't support them." __PRE_RAM__ means "Use simpler versions of functions, and no device tree." There are probably some places where both are tested, but only one is needed. Signed-off-by: Myles Watson <mylesgw@gmail.com> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4921 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2009-10-27Add few missing prototypes, and remove few unused (thus lonelly) variables.Maciej Pijanka
TODO - x86emu need (imo) some common header with prototypes at least - clog2, ulzma, hardwaremain prototypes added by this patch probably should be moved to some header too. - in src/devices/device_util.c prototype is before function because seems, it is used only within same file, if not it should be moved to debug section of prototypes in include/device/device.h Signed-off-by: Maciej Pijanka <maciej.pijanka@gmail.com> Acked-by: Myles Watson <mylesgw@gmail.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4871 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2006-03-13correct __ROMCC__Li-Ta Lo
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2193 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2004-10-14- Renamed cpu header filesEric Biederman
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1659 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1