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Diffstat (limited to 'include/asm-mips/war.h')
| -rw-r--r-- | include/asm-mips/war.h | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/include/asm-mips/war.h b/include/asm-mips/war.h deleted file mode 100644 index ad374bd3f13..00000000000 --- a/include/asm-mips/war.h +++ /dev/null @@ -1,238 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2002, 2004 by Ralf Baechle - */ -#ifndef _ASM_WAR_H -#define _ASM_WAR_H - -#include <linux/config.h> - -/* - * Another R4600 erratum. Due to the lack of errata information the exact - * technical details aren't known. I've experimentally found that disabling - * interrupts during indexed I-cache flushes seems to be sufficient to deal - * with the issue. - * - * #define R4600_V1_INDEX_ICACHEOP_WAR 1 - */ - -/* - * Pleasures of the R4600 V1.x. Cite from the IDT R4600 V1.7 errata: - * - * 18. The CACHE instructions Hit_Writeback_Invalidate_D, Hit_Writeback_D, - * Hit_Invalidate_D and Create_Dirty_Excl_D should only be - * executed if there is no other dcache activity. If the dcache is - * accessed for another instruction immeidately preceding when these - * cache instructions are executing, it is possible that the dcache - * tag match outputs used by these cache instructions will be - * incorrect. These cache instructions should be preceded by at least - * four instructions that are not any kind of load or store - * instruction. - * - * This is not allowed: lw - * nop - * nop - * nop - * cache Hit_Writeback_Invalidate_D - * - * This is allowed: lw - * nop - * nop - * nop - * nop - * cache Hit_Writeback_Invalidate_D - * - * #define R4600_V1_HIT_CACHEOP_WAR 1 - */ - - -/* - * Writeback and invalidate the primary cache dcache before DMA. - * - * R4600 v2.0 bug: "The CACHE instructions Hit_Writeback_Inv_D, - * Hit_Writeback_D, Hit_Invalidate_D and Create_Dirty_Exclusive_D will only - * operate correctly if the internal data cache refill buffer is empty. These - * CACHE instructions should be separated from any potential data cache miss - * by a load instruction to an uncached address to empty the response buffer." - * (Revision 2.0 device errata from IDT available on http://www.idt.com/ - * in .pdf format.) - * - * #define R4600_V2_HIT_CACHEOP_WAR 1 - */ - -/* - * R4600 CPU modules for the Indy come with both V1.7 and V2.0 processors. - */ -#ifdef CONFIG_SGI_IP22 - -#define R4600_V1_INDEX_ICACHEOP_WAR 1 -#define R4600_V1_HIT_CACHEOP_WAR 1 -#define R4600_V2_HIT_CACHEOP_WAR 1 - -#endif - -/* - * But the RM200C seems to have been shipped only with V2.0 R4600s - */ -#ifdef CONFIG_SNI_RM200_PCI - -#define R4600_V2_HIT_CACHEOP_WAR 1 - -#endif - -#ifdef CONFIG_CPU_R5432 - -/* - * When an interrupt happens on a CP0 register read instruction, CPU may - * lock up or read corrupted values of CP0 registers after it enters - * the exception handler. - * - * This workaround makes sure that we read a "safe" CP0 register as the - * first thing in the exception handler, which breaks one of the - * pre-conditions for this problem. - */ -#define R5432_CP0_INTERRUPT_WAR 1 - -#endif - -#if defined(CONFIG_SB1_PASS_1_WORKAROUNDS) || \ - defined(CONFIG_SB1_PASS_2_WORKAROUNDS) - -/* - * Workaround for the Sibyte M3 errata the text of which can be found at - * - * http://sibyte.broadcom.com/hw/bcm1250/docs/pass2errata.txt - * - * This will enable the use of a special TLB refill handler which does a - * consistency check on the information in c0_badvaddr and c0_entryhi and - * will just return and take the exception again if the information was - * found to be inconsistent. - */ -#define BCM1250_M3_WAR 1 - -/* - * This is a DUART workaround related to glitches around register accesses - */ -#define SIBYTE_1956_WAR 1 - -#endif - -/* - * Fill buffers not flushed on CACHE instructions - * - * Hit_Invalidate_I cacheops invalidate an icache line but the refill - * for that line can get stale data from the fill buffer instead of - * accessing memory if the previous icache miss was also to that line. - * - * Workaround: generate an icache refill from a different line - * - * Affects: - * MIPS 4K RTL revision <3.0, PRID revision <4 - */ -#if defined(CONFIG_MIPS_MALTA) || defined(CONFIG_MIPS_ATLAS) || \ - defined(CONFIG_MIPS_SEAD) -#define MIPS4K_ICACHE_REFILL_WAR 1 -#endif - -/* - * Missing implicit forced flush of evictions caused by CACHE - * instruction - * - * Evictions caused by a CACHE instructions are not forced on to the - * bus. The BIU gives higher priority to fetches than to the data from - * the eviction buffer and no collision detection is performed between - * fetches and pending data from the eviction buffer. - * - * Workaround: Execute a SYNC instruction after the cache instruction - * - * Affects: - * MIPS 5Kc,5Kf RTL revision <2.3, PRID revision <8 - * MIPS 20Kc RTL revision <4.0, PRID revision <? - */ -#if defined(CONFIG_MIPS_MALTA) || defined(CONFIG_MIPS_ATLAS) || \ - defined(CONFIG_MIPS_SEAD) -#define MIPS_CACHE_SYNC_WAR 1 -#endif - -/* - * From TX49/H2 manual: "If the instruction (i.e. CACHE) is issued for - * the line which this instruction itself exists, the following - * operation is not guaranteed." - * - * Workaround: do two phase flushing for Index_Invalidate_I - */ -#ifdef CONFIG_CPU_TX49XX -#define TX49XX_ICACHE_INDEX_INV_WAR 1 -#endif - -/* - * On the RM9000 there is a problem which makes the CreateDirtyExclusive - * cache operation unusable on SMP systems. - */ -#if defined(CONFIG_MOMENCO_JAGUAR_ATX) || defined(CONFIG_PMC_YOSEMITE) -#define RM9000_CDEX_SMP_WAR 1 -#endif - -/* - * The RM9000 has a bug (though PMC-Sierra opposes it being called that) - * where invalid instructions in the same I-cache line worth of instructions - * being fetched may case spurious exceptions. - */ -#if defined(CONFIG_MOMENCO_JAGUAR_ATX) || defined(CONFIG_MOMENCO_OCELOT_3) || \ - defined(CONFIG_PMC_YOSEMITE) -#define ICACHE_REFILLS_WORKAROUND_WAR 1 -#endif - - -/* - * ON the R10000 upto version 2.6 (not sure about 2.7) there is a bug that - * may cause ll / sc and lld / scd sequences to execute non-atomically. - */ -#ifdef CONFIG_SGI_IP27 -#define R10000_LLSC_WAR 1 -#endif - -/* - * Workarounds default to off - */ -#ifndef ICACHE_REFILLS_WORKAROUND_WAR -#define ICACHE_REFILLS_WORKAROUND_WAR 0 -#endif -#ifndef R4600_V1_INDEX_ICACHEOP_WAR -#define R4600_V1_INDEX_ICACHEOP_WAR 0 -#endif -#ifndef R4600_V1_HIT_CACHEOP_WAR -#define R4600_V1_HIT_CACHEOP_WAR 0 -#endif -#ifndef R4600_V2_HIT_CACHEOP_WAR -#define R4600_V2_HIT_CACHEOP_WAR 0 -#endif -#ifndef R5432_CP0_INTERRUPT_WAR -#define R5432_CP0_INTERRUPT_WAR 0 -#endif -#ifndef BCM1250_M3_WAR -#define BCM1250_M3_WAR 0 -#endif -#ifndef SIBYTE_1956_WAR -#define SIBYTE_1956_WAR 0 -#endif -#ifndef MIPS4K_ICACHE_REFILL_WAR -#define MIPS4K_ICACHE_REFILL_WAR 0 -#endif -#ifndef MIPS_CACHE_SYNC_WAR -#define MIPS_CACHE_SYNC_WAR 0 -#endif -#ifndef TX49XX_ICACHE_INDEX_INV_WAR -#define TX49XX_ICACHE_INDEX_INV_WAR 0 -#endif -#ifndef RM9000_CDEX_SMP_WAR -#define RM9000_CDEX_SMP_WAR 0 -#endif -#ifndef R10000_LLSC_WAR -#define R10000_LLSC_WAR 0 -#endif - -#endif /* _ASM_WAR_H */ |