powerpc: Allow CPU selection of e300core variants

GCC supports -mcpu=e300c2 and -mcpu=e300c3

This patch gives the opportunity to tune kernel to one of
those two types.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 165a64f..6c6a7c7 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -144,6 +144,14 @@ config 860_CPU
        bool "8xx family"
        depends on PPC_8xx
 
+config E300C2_CPU
+       bool "e300c2 (832x)"
+       depends on PPC_BOOK3S_32
+
+config E300C3_CPU
+       bool "e300c3 (831x)"
+       depends on PPC_BOOK3S_32
+
 endchoice
 
 config TARGET_CPU_BOOL
@@ -160,6 +168,8 @@ config TARGET_CPU
        default "power8" if POWER8_CPU
        default "power9" if POWER9_CPU
        default "860" if 860_CPU
+       default "e300c2" if E300C2_CPU
+       default "e300c3" if E300C3_CPU
 
 config PPC_BOOK3S
        def_bool y