From e174bd74c93637e78eb81048891acd4ea61520a9 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Fri, 8 Nov 2013 11:18:54 +0000 Subject: [PATCH] malta: disable L2 caches Malta boards may be used with cores which support L2 caches, however U-boot does not yet support L2 cache for MIPS. Thus for the moment we'll disable L2 caches by setting the L2B bit in Config2. This is specific to MTI/Imagination MIPS cores which is why this is done for the Malta board rather than generically. Signed-off-by: Paul Burton --- board/imgtec/malta/lowlevel_init.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/board/imgtec/malta/lowlevel_init.S b/board/imgtec/malta/lowlevel_init.S index 1af34f142f..ae09c27d07 100644 --- a/board/imgtec/malta/lowlevel_init.S +++ b/board/imgtec/malta/lowlevel_init.S @@ -12,6 +12,7 @@ #include #include #include +#include #ifdef CONFIG_SYS_BIG_ENDIAN #define CPU_TO_GT32(_x) ((_x)) @@ -27,6 +28,12 @@ .globl lowlevel_init lowlevel_init: + /* disable any L2 cache for now */ + sync + mfc0 t0, CP0_CONFIG, 2 + ori t0, t0, 0x1 << 12 + mtc0 t0, CP0_CONFIG, 2 + /* detect the core card */ li t0, KSEG1ADDR(MALTA_REVISION) lw t0, 0(t0) -- 2.25.1