diff options
| author | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-02-18 13:04:39 +0300 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-02-22 11:35:49 +0300 |
| commit | b56d1cafefaa4550888bace142be404db36b96a1 (patch) | |
| tree | 7eab945addbf343a45e714c8ea0a0478a5a0369c /arch/mips/Kconfig | |
| parent | c47c7ab9b53635860c6b48736efdd22822d726d7 (diff) | |
| download | linux-b56d1cafefaa4550888bace142be404db36b96a1.tar.xz | |
MIPS: remove asm/war.h
The major part for workaround handling has already moved to config
options. This change replaces the remaining defines by already
available config options and gets rid of war.h
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index c6672547ac5e..f8f11542d044 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2521,13 +2521,51 @@ config CPU_HAS_SYNC # # CPU non-features # + +# Work around the "daddi" and "daddiu" CPU errata: +# +# - The `daddi' instruction fails to trap on overflow. +# "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", +# erratum #23 +# +# - The `daddiu' instruction can produce an incorrect result. +# "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", +# erratum #41 +# "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum +# #15 +# "MIPS R4400PC/SC Errata, Processor Revision 1.0", erratum #7 +# "MIPS R4400MC Errata, Processor Revision 1.0", erratum #5 config CPU_DADDI_WORKAROUNDS bool +# Work around certain R4000 CPU errata (as implemented by GCC): +# +# - A double-word or a variable shift may give an incorrect result +# if executed immediately after starting an integer division: +# "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", +# erratum #28 +# "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0", erratum +# #19 +# +# - A double-word or a variable shift may give an incorrect result +# if executed while an integer multiplication is in progress: +# "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", +# errata #16 & #28 +# +# - An integer division may give an incorrect result if started in +# a delay slot of a taken branch or a jump: +# "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0", +# erratum #52 config CPU_R4000_WORKAROUNDS bool select CPU_R4400_WORKAROUNDS +# Work around certain R4400 CPU errata (as implemented by GCC): +# +# - A double-word or a variable shift may give an incorrect result +# if executed immediately after starting an integer division: +# "MIPS R4400MC Errata, Processor Revision 1.0", erratum #10 +# "MIPS R4400MC Errata, Processor Revision 2.0 & 3.0", erratum #4 config CPU_R4400_WORKAROUNDS bool |