ARCv2: entry: save Accumulator register pair (r58:59) if present

[linux-2.6-block.git] / arch / arc / Kconfig

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index c9f30f4763abce5ca1ffda1817e87bb5de410861..5d7fb3e7cb97159012d49e6cee745ada293949a6 100644 (file)
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -406,6 +406,14 @@ config ARC_HAS_DIV_REM
        bool "Insn: div, divu, rem, remu"
        default y
 
+config ARC_HAS_ACCL_REGS
+       bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
+       default n
+       help
+         Depending on the configuration, CPU can contain accumulator reg-pair
+         (also referred to as r58:r59). These can also be used by gcc as GPR so
+         kernel needs to save/restore per process
+
 endif  # ISA_ARCV2
 
 endmenu   # "ARC CPU Configuration"