MIPS: BMIPS: Select the appropriate L1_CACHE_SHIFT for 438x and 5000 CPUs

BMIPS438x has a 64-byte D$ line size and BMIPS5000 has a 128-byte L2
line size.  If L1_CACHE_SHIFT is undersized, DMA buffers will not be
cacheline-aligned and terrible things will happen.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: f.fainelli@gmail.com
Cc: mbizon@freebox.fr
Cc: jogo@openwrt.org
Cc: jfraser@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8164/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 992f98361e5a..002cf4c56ebf 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1587,12 +1587,14 @@ config CPU_BMIPS4350
 
 config CPU_BMIPS4380
         bool
+        select MIPS_L1_CACHE_SHIFT_6
         select SYS_SUPPORTS_SMP
         select SYS_SUPPORTS_HOTPLUG_CPU
 
 config CPU_BMIPS5000
         bool
         select MIPS_CPU_SCACHE
+        select MIPS_L1_CACHE_SHIFT_7
         select SYS_SUPPORTS_SMP
         select SYS_SUPPORTS_HOTPLUG_CPU