summaryrefslogtreecommitdiffstats
path: root/lib/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Kconfig')
-rw-r--r--lib/Kconfig39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 23fa7a359db..9c10e38fc60 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -158,6 +158,45 @@ config REED_SOLOMON_DEC16
boolean
#
+# BCH support is selected if needed
+#
+config BCH
+ tristate
+
+config BCH_CONST_PARAMS
+ boolean
+ help
+ Drivers may select this option to force specific constant
+ values for parameters 'm' (Galois field order) and 't'
+ (error correction capability). Those specific values must
+ be set by declaring default values for symbols BCH_CONST_M
+ and BCH_CONST_T.
+ Doing so will enable extra compiler optimizations,
+ improving encoding and decoding performance up to 2x for
+ usual (m,t) values (typically such that m*t < 200).
+ When this option is selected, the BCH library supports
+ only a single (m,t) configuration. This is mainly useful
+ for NAND flash board drivers requiring known, fixed BCH
+ parameters.
+
+config BCH_CONST_M
+ int
+ range 5 15
+ help
+ Constant value for Galois field order 'm'. If 'k' is the
+ number of data bits to protect, 'm' should be chosen such
+ that (k + m*t) <= 2**m - 1.
+ Drivers should declare a default value for this symbol if
+ they select option BCH_CONST_PARAMS.
+
+config BCH_CONST_T
+ int
+ help
+ Constant value for error correction capability in bits 't'.
+ Drivers should declare a default value for this symbol if
+ they select option BCH_CONST_PARAMS.
+
+#
# Textsearch support is select'ed if needed
#
config TEXTSEARCH