diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2008-09-16 13:48:51 -0400 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-11 11:18:52 -0400 |
commit | 384740dc49ea651ba350704d13ff6be9976e37fe (patch) | |
tree | a6e80cad287ccae7a86d81bfa692fc96889c88ed /include/asm-mips/war.h | |
parent | e8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff) |
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/war.h')
-rw-r--r-- | include/asm-mips/war.h | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/include/asm-mips/war.h b/include/asm-mips/war.h deleted file mode 100644 index 22361d5e3bf0..000000000000 --- a/include/asm-mips/war.h +++ /dev/null | |||
@@ -1,244 +0,0 @@ | |||
1 | /* | ||
2 | * This file is subject to the terms and conditions of the GNU General Public | ||
3 | * License. See the file "COPYING" in the main directory of this archive | ||
4 | * for more details. | ||
5 | * | ||
6 | * Copyright (C) 2002, 2004, 2007 by Ralf Baechle | ||
7 | * Copyright (C) 2007 Maciej W. Rozycki | ||
8 | */ | ||
9 | #ifndef _ASM_WAR_H | ||
10 | #define _ASM_WAR_H | ||
11 | |||
12 | #include <war.h> | ||
13 | |||
14 | /* | ||
15 | * Work around certain R4000 CPU errata (as implemented by GCC): | ||
16 | * | ||
17 | * - A double-word or a variable shift may give an incorrect result | ||
18 | * if executed immediately after starting an integer division: | ||
19 | * "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", | ||
20 | * erratum #28 | ||
21 | * "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum | ||
22 | * #19 | ||
23 | * | ||
24 | * - A double-word or a variable shift may give an incorrect result | ||
25 | * if executed while an integer multiplication is in progress: | ||
26 | * "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", | ||
27 | * errata #16 & #28 | ||
28 | * | ||
29 | * - An integer division may give an incorrect result if started in | ||
30 | * a delay slot of a taken branch or a jump: | ||
31 | * "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", | ||
32 | * erratum #52 | ||
33 | */ | ||
34 | #ifdef CONFIG_CPU_R4000_WORKAROUNDS | ||
35 | #define R4000_WAR 1 | ||
36 | #else | ||
37 | #define R4000_WAR 0 | ||
38 | #endif | ||
39 | |||
40 | /* | ||
41 | * Work around certain R4400 CPU errata (as implemented by GCC): | ||
42 | * | ||
43 | * - A double-word or a variable shift may give an incorrect result | ||
44 | * if executed immediately after starting an integer division: | ||
45 | * "MIPS R4400MC Errata, Processor Revision 1.0", erratum #10 | ||
46 | * "MIPS R4400MC Errata, Processor Revision 2.0 & 3.0", erratum #4 | ||
47 | */ | ||
48 | #ifdef CONFIG_CPU_R4400_WORKAROUNDS | ||
49 | #define R4400_WAR 1 | ||
50 | #else | ||
51 | #define R4400_WAR 0 | ||
52 | #endif | ||
53 | |||
54 | /* | ||
55 | * Work around the "daddi" and "daddiu" CPU errata: | ||
56 | * | ||
57 | * - The `daddi' instruction fails to trap on overflow. | ||
58 | * "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", | ||
59 | * erratum #23 | ||
60 | * | ||
61 | * - The `daddiu' instruction can produce an incorrect result. | ||
62 | * "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", | ||
63 | * erratum #41 | ||
64 | * "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum | ||
65 | * #15 | ||
66 | * "MIPS R4400PC/SC Errata, Processor Revision 1.0", erratum #7 | ||
67 | * "MIPS R4400MC Errata, Processor Revision 1.0", erratum #5 | ||
68 | */ | ||
69 | #ifdef CONFIG_CPU_DADDI_WORKAROUNDS | ||
70 | #define DADDI_WAR 1 | ||
71 | #else | ||
72 | #define DADDI_WAR 0 | ||
73 | #endif | ||
74 | |||
75 | /* | ||
76 | * Another R4600 erratum. Due to the lack of errata information the exact | ||
77 | * technical details aren't known. I've experimentally found that disabling | ||
78 | * interrupts during indexed I-cache flushes seems to be sufficient to deal | ||
79 | * with the issue. | ||
80 | */ | ||
81 | #ifndef R4600_V1_INDEX_ICACHEOP_WAR | ||
82 | #error Check setting of R4600_V1_INDEX_ICACHEOP_WAR for your platform | ||
83 | #endif | ||
84 | |||
85 | /* | ||
86 | * Pleasures of the R4600 V1.x. Cite from the IDT R4600 V1.7 errata: | ||
87 | * | ||
88 | * 18. The CACHE instructions Hit_Writeback_Invalidate_D, Hit_Writeback_D, | ||
89 | * Hit_Invalidate_D and Create_Dirty_Excl_D should only be | ||
90 | * executed if there is no other dcache activity. If the dcache is | ||
91 | * accessed for another instruction immeidately preceding when these | ||
92 | * cache instructions are executing, it is possible that the dcache | ||
93 | * tag match outputs used by these cache instructions will be | ||
94 | * incorrect. These cache instructions should be preceded by at least | ||
95 | * four instructions that are not any kind of load or store | ||
96 | * instruction. | ||
97 | * | ||
98 | * This is not allowed: lw | ||
99 | * nop | ||
100 | * nop | ||
101 | * nop | ||
102 | * cache Hit_Writeback_Invalidate_D | ||
103 | * | ||
104 | * This is allowed: lw | ||
105 | * nop | ||
106 | * nop | ||
107 | * nop | ||
108 | * nop | ||
109 | * cache Hit_Writeback_Invalidate_D | ||
110 | */ | ||
111 | #ifndef R4600_V1_HIT_CACHEOP_WAR | ||
112 | #error Check setting of R4600_V1_HIT_CACHEOP_WAR for your platform | ||
113 | #endif | ||
114 | |||
115 | |||
116 | /* | ||
117 | * Writeback and invalidate the primary cache dcache before DMA. | ||
118 | * | ||
119 | * R4600 v2.0 bug: "The CACHE instructions Hit_Writeback_Inv_D, | ||
120 | * Hit_Writeback_D, Hit_Invalidate_D and Create_Dirty_Exclusive_D will only | ||
121 | * operate correctly if the internal data cache refill buffer is empty. These | ||
122 | * CACHE instructions should be separated from any potential data cache miss | ||
123 | * by a load instruction to an uncached address to empty the response buffer." | ||
124 | * (Revision 2.0 device errata from IDT available on http://www.idt.com/ | ||
125 | * in .pdf format.) | ||
126 | */ | ||
127 | #ifndef R4600_V2_HIT_CACHEOP_WAR | ||
128 | #error Check setting of R4600_V2_HIT_CACHEOP_WAR for your platform | ||
129 | #endif | ||
130 | |||
131 | /* | ||
132 | * When an interrupt happens on a CP0 register read instruction, CPU may | ||
133 | * lock up or read corrupted values of CP0 registers after it enters | ||
134 | * the exception handler. | ||
135 | * | ||
136 | * This workaround makes sure that we read a "safe" CP0 register as the | ||
137 | * first thing in the exception handler, which breaks one of the | ||
138 | * pre-conditions for this problem. | ||
139 | */ | ||
140 | #ifndef R5432_CP0_INTERRUPT_WAR | ||
141 | #error Check setting of R5432_CP0_INTERRUPT_WAR for your platform | ||
142 | #endif | ||
143 | |||
144 | /* | ||
145 | * Workaround for the Sibyte M3 errata the text of which can be found at | ||
146 | * | ||
147 | * http://sibyte.broadcom.com/hw/bcm1250/docs/pass2errata.txt | ||
148 | * | ||
149 | * This will enable the use of a special TLB refill handler which does a | ||
150 | * consistency check on the information in c0_badvaddr and c0_entryhi and | ||
151 | * will just return and take the exception again if the information was | ||
152 | * found to be inconsistent. | ||
153 | */ | ||
154 | #ifndef BCM1250_M3_WAR | ||
155 | #error Check setting of BCM1250_M3_WAR for your platform | ||
156 | #endif | ||
157 | |||
158 | /* | ||
159 | * This is a DUART workaround related to glitches around register accesses | ||
160 | */ | ||
161 | #ifndef SIBYTE_1956_WAR | ||
162 | #error Check setting of SIBYTE_1956_WAR for your platform | ||
163 | #endif | ||
164 | |||
165 | /* | ||
166 | * Fill buffers not flushed on CACHE instructions | ||
167 | * | ||
168 | * Hit_Invalidate_I cacheops invalidate an icache line but the refill | ||
169 | * for that line can get stale data from the fill buffer instead of | ||
170 | * accessing memory if the previous icache miss was also to that line. | ||
171 | * | ||
172 | * Workaround: generate an icache refill from a different line | ||
173 | * | ||
174 | * Affects: | ||
175 | * MIPS 4K RTL revision <3.0, PRID revision <4 | ||
176 | */ | ||
177 | #ifndef MIPS4K_ICACHE_REFILL_WAR | ||
178 | #error Check setting of MIPS4K_ICACHE_REFILL_WAR for your platform | ||
179 | #endif | ||
180 | |||
181 | /* | ||
182 | * Missing implicit forced flush of evictions caused by CACHE | ||
183 | * instruction | ||
184 | * | ||
185 | * Evictions caused by a CACHE instructions are not forced on to the | ||
186 | * bus. The BIU gives higher priority to fetches than to the data from | ||
187 | * the eviction buffer and no collision detection is performed between | ||
188 | * fetches and pending data from the eviction buffer. | ||
189 | * | ||
190 | * Workaround: Execute a SYNC instruction after the cache instruction | ||
191 | * | ||
192 | * Affects: | ||
193 | * MIPS 5Kc,5Kf RTL revision <2.3, PRID revision <8 | ||
194 | * MIPS 20Kc RTL revision <4.0, PRID revision <? | ||
195 | */ | ||
196 | #ifndef MIPS_CACHE_SYNC_WAR | ||
197 | #error Check setting of MIPS_CACHE_SYNC_WAR for your platform | ||
198 | #endif | ||
199 | |||
200 | /* | ||
201 | * From TX49/H2 manual: "If the instruction (i.e. CACHE) is issued for | ||
202 | * the line which this instruction itself exists, the following | ||
203 | * operation is not guaranteed." | ||
204 | * | ||
205 | * Workaround: do two phase flushing for Index_Invalidate_I | ||
206 | */ | ||
207 | #ifndef TX49XX_ICACHE_INDEX_INV_WAR | ||
208 | #error Check setting of TX49XX_ICACHE_INDEX_INV_WAR for your platform | ||
209 | #endif | ||
210 | |||
211 | /* | ||
212 | * On the RM9000 there is a problem which makes the CreateDirtyExclusive | ||
213 | * eache operation unusable on SMP systems. | ||
214 | */ | ||
215 | #ifndef RM9000_CDEX_SMP_WAR | ||
216 | #error Check setting of RM9000_CDEX_SMP_WAR for your platform | ||
217 | #endif | ||
218 | |||
219 | /* | ||
220 | * The RM7000 processors and the E9000 cores have a bug (though PMC-Sierra | ||
221 | * opposes it being called that) where invalid instructions in the same | ||
222 | * I-cache line worth of instructions being fetched may case spurious | ||
223 | * exceptions. | ||
224 | */ | ||
225 | #ifndef ICACHE_REFILLS_WORKAROUND_WAR | ||
226 | #error Check setting of ICACHE_REFILLS_WORKAROUND_WAR for your platform | ||
227 | #endif | ||
228 | |||
229 | /* | ||
230 | * On the R10000 upto version 2.6 (not sure about 2.7) there is a bug that | ||
231 | * may cause ll / sc and lld / scd sequences to execute non-atomically. | ||
232 | */ | ||
233 | #ifndef R10000_LLSC_WAR | ||
234 | #error Check setting of R10000_LLSC_WAR for your platform | ||
235 | #endif | ||
236 | |||
237 | /* | ||
238 | * 34K core erratum: "Problems Executing the TLBR Instruction" | ||
239 | */ | ||
240 | #ifndef MIPS34K_MISSED_ITLB_WAR | ||
241 | #error Check setting of MIPS34K_MISSED_ITLB_WAR for your platform | ||
242 | #endif | ||
243 | |||
244 | #endif /* _ASM_WAR_H */ | ||