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- ChangeLog
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-
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- Prehistory Martin Tischhäuser <martin@ikcbarka.fzk.de>
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- Initial register-setting code (from proform-1.0).
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- 19971216 Richard Gooch <rgooch@atnf.csiro.au>
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- Original version for /proc/mtrr interface, SMP-safe.
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- v1.0
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- 19971217 Richard Gooch <rgooch@atnf.csiro.au>
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- Bug fix for ioctls()'s.
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- Added sample code in Documentation/mtrr.txt
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- v1.1
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- 19971218 Richard Gooch <rgooch@atnf.csiro.au>
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- Disallow overlapping regions.
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- 19971219 Jens Maurer <jmaurer@menuett.rhein-main.de>
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- Register-setting fixups.
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- v1.2
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- 19971222 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixups for kernel 2.1.75.
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- v1.3
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- 19971229 David Wragg <dpw@doc.ic.ac.uk>
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- Register-setting fixups and conformity with Intel conventions.
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- 19971229 Richard Gooch <rgooch@atnf.csiro.au>
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- Cosmetic changes and wrote this ChangeLog ;-)
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- 19980106 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixups for kernel 2.1.78.
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- v1.4
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- 19980119 David Wragg <dpw@doc.ic.ac.uk>
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- Included passive-release enable code (elsewhere in PCI setup).
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- v1.5
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- 19980131 Richard Gooch <rgooch@atnf.csiro.au>
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- Replaced global kernel lock with private spinlock.
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- v1.6
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- 19980201 Richard Gooch <rgooch@atnf.csiro.au>
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- Added wait for other CPUs to complete changes.
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- v1.7
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- 19980202 Richard Gooch <rgooch@atnf.csiro.au>
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- Bug fix in definition of <set_mtrr> for UP.
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- v1.8
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- 19980319 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixups for kernel 2.1.90.
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- 19980323 Richard Gooch <rgooch@atnf.csiro.au>
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- Move SMP BIOS fixup before secondary CPUs call <calibrate_delay>
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- v1.9
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- 19980325 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixed test for overlapping regions: confused by adjacent regions
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- 19980326 Richard Gooch <rgooch@atnf.csiro.au>
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- Added wbinvd in <set_mtrr_prepare>.
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- 19980401 Richard Gooch <rgooch@atnf.csiro.au>
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- Bug fix for non-SMP compilation.
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- 19980418 David Wragg <dpw@doc.ic.ac.uk>
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- Fixed-MTRR synchronisation for SMP and use atomic operations
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- instead of spinlocks.
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- 19980418 Richard Gooch <rgooch@atnf.csiro.au>
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- Differentiate different MTRR register classes for BIOS fixup.
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- v1.10
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- 19980419 David Wragg <dpw@doc.ic.ac.uk>
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- Bug fix in variable MTRR synchronisation.
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- v1.11
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- 19980419 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixups for kernel 2.1.97.
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- v1.12
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- 19980421 Richard Gooch <rgooch@atnf.csiro.au>
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- Safer synchronisation across CPUs when changing MTRRs.
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- v1.13
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- 19980423 Richard Gooch <rgooch@atnf.csiro.au>
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- Bugfix for SMP systems without MTRR support.
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- v1.14
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- 19980427 Richard Gooch <rgooch@atnf.csiro.au>
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- Trap calls to <mtrr_add> and <mtrr_del> on non-MTRR machines.
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- v1.15
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- 19980427 Richard Gooch <rgooch@atnf.csiro.au>
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- Use atomic bitops for setting SMP change mask.
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- v1.16
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- 19980428 Richard Gooch <rgooch@atnf.csiro.au>
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- Removed spurious diagnostic message.
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- v1.17
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- 19980429 Richard Gooch <rgooch@atnf.csiro.au>
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- Moved register-setting macros into this file.
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- Moved setup code from init/main.c to i386-specific areas.
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- v1.18
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- 19980502 Richard Gooch <rgooch@atnf.csiro.au>
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- Moved MTRR detection outside conditionals in <mtrr_init>.
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- v1.19
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- 19980502 Richard Gooch <rgooch@atnf.csiro.au>
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- Documentation improvement: mention Pentium II and AGP.
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- v1.20
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- 19980521 Richard Gooch <rgooch@atnf.csiro.au>
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- Only manipulate interrupt enable flag on local CPU.
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- Allow enclosed uncachable regions.
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- v1.21
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- 19980611 Richard Gooch <rgooch@atnf.csiro.au>
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- Always define <main_lock>.
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- v1.22
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- 19980901 Richard Gooch <rgooch@atnf.csiro.au>
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- Removed module support in order to tidy up code.
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- Added sanity check for <mtrr_add>/<mtrr_del> before <mtrr_init>.
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- Created addition queue for prior to SMP commence.
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- v1.23
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- 19980902 Richard Gooch <rgooch@atnf.csiro.au>
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- Ported patch to kernel 2.1.120-pre3.
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- v1.24
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- 19980910 Richard Gooch <rgooch@atnf.csiro.au>
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- Removed sanity checks and addition queue: Linus prefers an OOPS.
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- v1.25
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- 19981001 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixed harmless compiler warning in include/asm-i386/mtrr.h
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- Fixed version numbering and history for v1.23 -> v1.24.
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- v1.26
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- 19990118 Richard Gooch <rgooch@atnf.csiro.au>
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- Added devfs support.
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- v1.27
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- 19990123 Richard Gooch <rgooch@atnf.csiro.au>
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- Changed locking to spin with reschedule.
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- Made use of new <smp_call_function>.
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- v1.28
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- 19990201 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Extended the driver to be able to use Cyrix style ARRs.
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- 19990204 Richard Gooch <rgooch@atnf.csiro.au>
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- Restructured Cyrix support.
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- v1.29
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- 19990204 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Refined ARR support: enable MAPEN in set_mtrr_prepare()
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- and disable MAPEN in set_mtrr_done().
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- 19990205 Richard Gooch <rgooch@atnf.csiro.au>
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- Minor cleanups.
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- v1.30
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- 19990208 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Protect plain 6x86s (and other processors without the
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- Page Global Enable feature) against accessing CR4 in
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- set_mtrr_prepare() and set_mtrr_done().
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- 19990210 Richard Gooch <rgooch@atnf.csiro.au>
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- Turned <set_mtrr_up> and <get_mtrr> into function pointers.
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- v1.31
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- 19990212 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Major rewrite of cyrix_arr_init(): do not touch ARRs,
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- leave them as the BIOS have set them up.
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- Enable usage of all 8 ARRs.
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- Avoid multiplications by 3 everywhere and other
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- code clean ups/speed ups.
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- 19990213 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Set up other Cyrix processors identical to the boot cpu.
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- Since Cyrix don't support Intel APIC, this is l'art pour l'art.
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- Weigh ARRs by size:
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- If size <= 32M is given, set up ARR# we were given.
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- If size > 32M is given, set up ARR7 only if it is free,
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- fail otherwise.
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- 19990214 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Also check for size >= 256K if we are to set up ARR7,
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- mtrr_add() returns the value it gets from set_mtrr()
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- 19990218 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Remove Cyrix "coma bug" workaround from here.
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- Moved to linux/arch/i386/kernel/setup.c and
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- linux/include/asm-i386/bugs.h
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- 19990228 Richard Gooch <rgooch@atnf.csiro.au>
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- Added MTRRIOC_KILL_ENTRY ioctl(2)
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- Trap for counter underflow in <mtrr_file_del>.
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- Trap for 4 MiB aligned regions for PPro, stepping <= 7.
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- 19990301 Richard Gooch <rgooch@atnf.csiro.au>
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- Created <get_free_region> hook.
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- 19990305 Richard Gooch <rgooch@atnf.csiro.au>
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- Temporarily disable AMD support now MTRR capability flag is set.
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- v1.32
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- 19990308 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Adjust my changes (19990212-19990218) to Richard Gooch's
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- latest changes. (19990228-19990305)
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- v1.33
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- 19990309 Richard Gooch <rgooch@atnf.csiro.au>
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- Fixed typo in <printk> message.
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- 19990310 Richard Gooch <rgooch@atnf.csiro.au>
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- Support K6-II/III based on Alan Cox's <alan@redhat.com> patches.
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- v1.34
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- 19990511 Bart Hartgers <bart@etpmod.phys.tue.nl>
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- Support Centaur C6 MCR's.
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- 19990512 Richard Gooch <rgooch@atnf.csiro.au>
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- Minor cleanups.
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- v1.35
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- 19990707 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Check whether ARR3 is protected in cyrix_get_free_region()
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- and mtrr_del(). The code won't attempt to delete or change it
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- from now on if the BIOS protected ARR3. It silently skips ARR3
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- in cyrix_get_free_region() or returns with an error code from
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- mtrr_del().
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- 19990711 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Reset some bits in the CCRs in cyrix_arr_init() to disable SMM
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- if ARR3 isn't protected. This is needed because if SMM is active
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- and ARR3 isn't protected then deleting and setting ARR3 again
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- may lock up the processor. With SMM entirely disabled, it does
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- not happen.
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- 19990812 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Rearrange switch() statements so the driver accomodates to
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- the fact that the AMD Athlon handles its MTRRs the same way
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- as Intel does.
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- 19990814 Zoltán Böszörményi <zboszor@mail.externet.hu>
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- Double check for Intel in mtrr_add()'s big switch() because
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- that revision check is only valid for Intel CPUs.
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- 19990819 Alan Cox <alan@redhat.com>
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- Tested Zoltan's changes on a pre production Athlon - 100%
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- success.
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- 19991008 Manfred Spraul <manfreds@colorfullife.com>
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- replaced spin_lock_reschedule() with a normal semaphore.
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- v1.36
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- 20000221 Richard Gooch <rgooch@atnf.csiro.au>
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- Compile fix if procfs and devfs not enabled.
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- Formatting changes.
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- v1.37
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- 20001109 H. Peter Anvin <hpa@zytor.com>
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- Use the new centralized CPU feature detects.
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-
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- v1.38
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- 20010309 Dave Jones <davej@suse.de>
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- Add support for Cyrix III.
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-
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- v1.39
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- 20010312 Dave Jones <davej@suse.de>
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- Ugh, I broke AMD support.
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- Reworked fix by Troels Walsted Hansen <troels@thule.no>
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-
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- v1.40
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- 20010327 Dave Jones <davej@suse.de>
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- Adapted Cyrix III support to include VIA C3.
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-
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- v2.0
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- 20020306 Patrick Mochel <mochel@osdl.org>
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- Split mtrr.c -> mtrr/*.c
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- Converted to Linux Kernel Coding Style
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- Fixed several minor nits in form
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- Moved some SMP-only functions out, so they can be used
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- for power management in the future.
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- TODO: Fix user interface cruft.
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