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Diffstat (limited to 'arch/i386/kernel/cpu/mtrr/changelog')
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1 ChangeLog
2
3 Prehistory Martin Tischhäuser <martin@ikcbarka.fzk.de>
4 Initial register-setting code (from proform-1.0).
5 19971216 Richard Gooch <rgooch@atnf.csiro.au>
6 Original version for /proc/mtrr interface, SMP-safe.
7 v1.0
8 19971217 Richard Gooch <rgooch@atnf.csiro.au>
9 Bug fix for ioctls()'s.
10 Added sample code in Documentation/mtrr.txt
11 v1.1
12 19971218 Richard Gooch <rgooch@atnf.csiro.au>
13 Disallow overlapping regions.
14 19971219 Jens Maurer <jmaurer@menuett.rhein-main.de>
15 Register-setting fixups.
16 v1.2
17 19971222 Richard Gooch <rgooch@atnf.csiro.au>
18 Fixups for kernel 2.1.75.
19 v1.3
20 19971229 David Wragg <dpw@doc.ic.ac.uk>
21 Register-setting fixups and conformity with Intel conventions.
22 19971229 Richard Gooch <rgooch@atnf.csiro.au>
23 Cosmetic changes and wrote this ChangeLog ;-)
24 19980106 Richard Gooch <rgooch@atnf.csiro.au>
25 Fixups for kernel 2.1.78.
26 v1.4
27 19980119 David Wragg <dpw@doc.ic.ac.uk>
28 Included passive-release enable code (elsewhere in PCI setup).
29 v1.5
30 19980131 Richard Gooch <rgooch@atnf.csiro.au>
31 Replaced global kernel lock with private spinlock.
32 v1.6
33 19980201 Richard Gooch <rgooch@atnf.csiro.au>
34 Added wait for other CPUs to complete changes.
35 v1.7
36 19980202 Richard Gooch <rgooch@atnf.csiro.au>
37 Bug fix in definition of <set_mtrr> for UP.
38 v1.8
39 19980319 Richard Gooch <rgooch@atnf.csiro.au>
40 Fixups for kernel 2.1.90.
41 19980323 Richard Gooch <rgooch@atnf.csiro.au>
42 Move SMP BIOS fixup before secondary CPUs call <calibrate_delay>
43 v1.9
44 19980325 Richard Gooch <rgooch@atnf.csiro.au>
45 Fixed test for overlapping regions: confused by adjacent regions
46 19980326 Richard Gooch <rgooch@atnf.csiro.au>
47 Added wbinvd in <set_mtrr_prepare>.
48 19980401 Richard Gooch <rgooch@atnf.csiro.au>
49 Bug fix for non-SMP compilation.
50 19980418 David Wragg <dpw@doc.ic.ac.uk>
51 Fixed-MTRR synchronisation for SMP and use atomic operations
52 instead of spinlocks.
53 19980418 Richard Gooch <rgooch@atnf.csiro.au>
54 Differentiate different MTRR register classes for BIOS fixup.
55 v1.10
56 19980419 David Wragg <dpw@doc.ic.ac.uk>
57 Bug fix in variable MTRR synchronisation.
58 v1.11
59 19980419 Richard Gooch <rgooch@atnf.csiro.au>
60 Fixups for kernel 2.1.97.
61 v1.12
62 19980421 Richard Gooch <rgooch@atnf.csiro.au>
63 Safer synchronisation across CPUs when changing MTRRs.
64 v1.13
65 19980423 Richard Gooch <rgooch@atnf.csiro.au>
66 Bugfix for SMP systems without MTRR support.
67 v1.14
68 19980427 Richard Gooch <rgooch@atnf.csiro.au>
69 Trap calls to <mtrr_add> and <mtrr_del> on non-MTRR machines.
70 v1.15
71 19980427 Richard Gooch <rgooch@atnf.csiro.au>
72 Use atomic bitops for setting SMP change mask.
73 v1.16
74 19980428 Richard Gooch <rgooch@atnf.csiro.au>
75 Removed spurious diagnostic message.
76 v1.17
77 19980429 Richard Gooch <rgooch@atnf.csiro.au>
78 Moved register-setting macros into this file.
79 Moved setup code from init/main.c to i386-specific areas.
80 v1.18
81 19980502 Richard Gooch <rgooch@atnf.csiro.au>
82 Moved MTRR detection outside conditionals in <mtrr_init>.
83 v1.19
84 19980502 Richard Gooch <rgooch@atnf.csiro.au>
85 Documentation improvement: mention Pentium II and AGP.
86 v1.20
87 19980521 Richard Gooch <rgooch@atnf.csiro.au>
88 Only manipulate interrupt enable flag on local CPU.
89 Allow enclosed uncachable regions.
90 v1.21
91 19980611 Richard Gooch <rgooch@atnf.csiro.au>
92 Always define <main_lock>.
93 v1.22
94 19980901 Richard Gooch <rgooch@atnf.csiro.au>
95 Removed module support in order to tidy up code.
96 Added sanity check for <mtrr_add>/<mtrr_del> before <mtrr_init>.
97 Created addition queue for prior to SMP commence.
98 v1.23
99 19980902 Richard Gooch <rgooch@atnf.csiro.au>
100 Ported patch to kernel 2.1.120-pre3.
101 v1.24
102 19980910 Richard Gooch <rgooch@atnf.csiro.au>
103 Removed sanity checks and addition queue: Linus prefers an OOPS.
104 v1.25
105 19981001 Richard Gooch <rgooch@atnf.csiro.au>
106 Fixed harmless compiler warning in include/asm-i386/mtrr.h
107 Fixed version numbering and history for v1.23 -> v1.24.
108 v1.26
109 19990118 Richard Gooch <rgooch@atnf.csiro.au>
110 Added devfs support.
111 v1.27
112 19990123 Richard Gooch <rgooch@atnf.csiro.au>
113 Changed locking to spin with reschedule.
114 Made use of new <smp_call_function>.
115 v1.28
116 19990201 Zoltán Böszörményi <zboszor@mail.externet.hu>
117 Extended the driver to be able to use Cyrix style ARRs.
118 19990204 Richard Gooch <rgooch@atnf.csiro.au>
119 Restructured Cyrix support.
120 v1.29
121 19990204 Zoltán Böszörményi <zboszor@mail.externet.hu>
122 Refined ARR support: enable MAPEN in set_mtrr_prepare()
123 and disable MAPEN in set_mtrr_done().
124 19990205 Richard Gooch <rgooch@atnf.csiro.au>
125 Minor cleanups.
126 v1.30
127 19990208 Zoltán Böszörményi <zboszor@mail.externet.hu>
128 Protect plain 6x86s (and other processors without the
129 Page Global Enable feature) against accessing CR4 in
130 set_mtrr_prepare() and set_mtrr_done().
131 19990210 Richard Gooch <rgooch@atnf.csiro.au>
132 Turned <set_mtrr_up> and <get_mtrr> into function pointers.
133 v1.31
134 19990212 Zoltán Böszörményi <zboszor@mail.externet.hu>
135 Major rewrite of cyrix_arr_init(): do not touch ARRs,
136 leave them as the BIOS have set them up.
137 Enable usage of all 8 ARRs.
138 Avoid multiplications by 3 everywhere and other
139 code clean ups/speed ups.
140 19990213 Zoltán Böszörményi <zboszor@mail.externet.hu>
141 Set up other Cyrix processors identical to the boot cpu.
142 Since Cyrix don't support Intel APIC, this is l'art pour l'art.
143 Weigh ARRs by size:
144 If size <= 32M is given, set up ARR# we were given.
145 If size > 32M is given, set up ARR7 only if it is free,
146 fail otherwise.
147 19990214 Zoltán Böszörményi <zboszor@mail.externet.hu>
148 Also check for size >= 256K if we are to set up ARR7,
149 mtrr_add() returns the value it gets from set_mtrr()
150 19990218 Zoltán Böszörményi <zboszor@mail.externet.hu>
151 Remove Cyrix "coma bug" workaround from here.
152 Moved to linux/arch/i386/kernel/setup.c and
153 linux/include/asm-i386/bugs.h
154 19990228 Richard Gooch <rgooch@atnf.csiro.au>
155 Added MTRRIOC_KILL_ENTRY ioctl(2)
156 Trap for counter underflow in <mtrr_file_del>.
157 Trap for 4 MiB aligned regions for PPro, stepping <= 7.
158 19990301 Richard Gooch <rgooch@atnf.csiro.au>
159 Created <get_free_region> hook.
160 19990305 Richard Gooch <rgooch@atnf.csiro.au>
161 Temporarily disable AMD support now MTRR capability flag is set.
162 v1.32
163 19990308 Zoltán Böszörményi <zboszor@mail.externet.hu>
164 Adjust my changes (19990212-19990218) to Richard Gooch's
165 latest changes. (19990228-19990305)
166 v1.33
167 19990309 Richard Gooch <rgooch@atnf.csiro.au>
168 Fixed typo in <printk> message.
169 19990310 Richard Gooch <rgooch@atnf.csiro.au>
170 Support K6-II/III based on Alan Cox's <alan@redhat.com> patches.
171 v1.34
172 19990511 Bart Hartgers <bart@etpmod.phys.tue.nl>
173 Support Centaur C6 MCR's.
174 19990512 Richard Gooch <rgooch@atnf.csiro.au>
175 Minor cleanups.
176 v1.35
177 19990707 Zoltán Böszörményi <zboszor@mail.externet.hu>
178 Check whether ARR3 is protected in cyrix_get_free_region()
179 and mtrr_del(). The code won't attempt to delete or change it
180 from now on if the BIOS protected ARR3. It silently skips ARR3
181 in cyrix_get_free_region() or returns with an error code from
182 mtrr_del().
183 19990711 Zoltán Böszörményi <zboszor@mail.externet.hu>
184 Reset some bits in the CCRs in cyrix_arr_init() to disable SMM
185 if ARR3 isn't protected. This is needed because if SMM is active
186 and ARR3 isn't protected then deleting and setting ARR3 again
187 may lock up the processor. With SMM entirely disabled, it does
188 not happen.
189 19990812 Zoltán Böszörményi <zboszor@mail.externet.hu>
190 Rearrange switch() statements so the driver accomodates to
191 the fact that the AMD Athlon handles its MTRRs the same way
192 as Intel does.
193 19990814 Zoltán Böszörményi <zboszor@mail.externet.hu>
194 Double check for Intel in mtrr_add()'s big switch() because
195 that revision check is only valid for Intel CPUs.
196 19990819 Alan Cox <alan@redhat.com>
197 Tested Zoltan's changes on a pre production Athlon - 100%
198 success.
199 19991008 Manfred Spraul <manfreds@colorfullife.com>
200 replaced spin_lock_reschedule() with a normal semaphore.
201 v1.36
202 20000221 Richard Gooch <rgooch@atnf.csiro.au>
203 Compile fix if procfs and devfs not enabled.
204 Formatting changes.
205 v1.37
206 20001109 H. Peter Anvin <hpa@zytor.com>
207 Use the new centralized CPU feature detects.
208
209 v1.38
210 20010309 Dave Jones <davej@suse.de>
211 Add support for Cyrix III.
212
213 v1.39
214 20010312 Dave Jones <davej@suse.de>
215 Ugh, I broke AMD support.
216 Reworked fix by Troels Walsted Hansen <troels@thule.no>
217
218 v1.40
219 20010327 Dave Jones <davej@suse.de>
220 Adapted Cyrix III support to include VIA C3.
221
222 v2.0
223 20020306 Patrick Mochel <mochel@osdl.org>
224 Split mtrr.c -> mtrr/*.c
225 Converted to Linux Kernel Coding Style
226 Fixed several minor nits in form
227 Moved some SMP-only functions out, so they can be used
228 for power management in the future.
229 TODO: Fix user interface cruft.