kernel-ark/include
Maciej W. Rozycki 20d60d9973 [MIPS] R4000/R4400 errata workarounds
This is the gereric part of R4000/R4400 errata workarounds.  They include 
compiler and assembler support as well as some source code modifications 
to address the problems with some combinations of multiply/divide+shift 
instructions as well as the daddi and daddiu instructions.

 Changes included are as follows:

1. New Kconfig options to select workarounds by platforms as necessary.

2. Arch top-level Makefile to pass necessary options to the compiler; also 
   incompatible configurations are detected (-mno-sym32 unsupported as 
   horribly intrusive for little gain).

3. Bug detection updated and shuffled -- the multiply/divide+shift problem 
   is lethal enough that if not worked around it makes the kernel crash in 
   time_init() because of a division by zero; the daddiu erratum might 
   also trigger early potentially, though I have not observed it.  On the 
   other hand the daddi detection code requires the exception subsystem to 
   have been initialised (and is there mainly for information).

4. r4k_daddiu_bug() added so that the existence of the erratum can be 
   queried by code at the run time as necessary; useful for generated code 
   like TLB fault and copy/clear page handlers.

5. __udelay() updated as it uses multiplication in inline assembly.

 Note that -mdaddi requires modified toolchain (which has been maintained 
by myself and available from my site for ~4years now -- versions covered 
are GCC 2.95.4 - 4.1.2 and binutils from 2.13 onwards).  The -mfix-r4000 
and -mfix-r4400 have been standard for a while though.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
..
acpi kobject: convert /sys/firmware/acpi/ to use kobject_create 2008-01-24 20:40:23 -08:00
asm-alpha alpha: build fixes 2007-12-17 19:28:16 -08:00
asm-arm Merge branch 'pxa-plat' into devel 2008-01-28 13:21:38 +00:00
asm-avr32 [ARM] 4764/1: [AT91] AT91CAP9 core support 2008-01-26 15:01:13 +00:00
asm-blackfin [Blackfin] arch: Add the semtimedop syscall. Upstream uClibc doesn't compile without it. 2008-01-27 19:56:43 +08:00
asm-cris ide: remove stale ide.h "configuration options" 2008-01-25 22:17:08 +01:00
asm-frv ide: remove stale ide.h "configuration options" 2008-01-25 22:17:08 +01:00
asm-generic sched: SCHED_FIFO/SCHED_RR watchdog timer 2008-01-25 21:08:27 +01:00
asm-h8300 asm-h8300: parentheses around definition CLOCK_TICK_RATE 2007-12-10 19:43:54 -08:00
asm-ia64 [IA64] Update Altix BTE error return status patch 2008-01-03 13:18:58 -08:00
asm-m32r m32r: Update sys_rt_sigsuspend 2007-11-28 01:24:04 +09:00
asm-m68k Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-m68knommu m68knommu: fix pread/pwrite defines 2007-11-05 15:12:33 -08:00
asm-mips [MIPS] R4000/R4400 errata workarounds 2008-01-29 10:14:54 +00:00
asm-parisc [PARISC] print more than one character at a time for pdc console 2007-12-06 09:32:15 -08:00
asm-powerpc ide: remove stale ide.h "configuration options" 2008-01-25 22:17:08 +01:00
asm-ppc ppc: fix AT_VECTOR_SIZE on arch/ppc 2007-10-22 19:18:54 -07:00
asm-s390 [S390] do local_irq_restore while spinning in spin_lock_irqsave. 2008-01-26 14:11:31 +01:00
asm-sh sh: add spi header and r2d platform data V3 2008-01-28 16:24:46 +09:00
asm-sparc [SPARC32]: Silence sparc32 warnings on missing syscalls. 2007-12-14 10:59:50 -08:00
asm-sparc64 [SPARC64]: Implement pci_resource_to_user() 2007-12-26 19:33:46 -08:00
asm-um uml: update address space affected by pud_clear 2007-11-14 18:45:37 -08:00
asm-v850 Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-x86 sched: high-res preemption tick 2008-01-25 21:08:29 +01:00
asm-xtensa xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it 2007-10-24 13:28:40 +02:00
crypto [CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h 2008-01-11 08:16:59 +11:00
keys
linux Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2008-01-29 08:52:20 +11:00
math-emu
media i2c: Constify client address data 2008-01-27 18:14:46 +01:00
mtd
net IPoIB: improve IPv4/IPv6 to IB mcast mapping functions 2008-01-25 14:15:37 -08:00
pcmcia [AVR32] pcmcia ioaddr_t should be 32 bits on AVR32 2007-11-15 13:47:19 +01:00
rdma RDMA/cma: add support for rdma_migrate_id() 2008-01-25 14:15:32 -08:00
rxrpc
scsi SG: Convert SCSI to use scatterlist helpers for sg chaining 2008-01-28 10:05:27 +01:00
sound [ALSA] version 1.0.15 2007-11-20 20:16:43 +01:00
video Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
xen
Kbuild