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| author | Paul Burton <paul.burton@imgtec.com> | 2013-11-08 11:18:54 +0000 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2013-11-09 17:21:02 +0100 |
| commit | e174bd74c93637e78eb81048891acd4ea61520a9 (patch) | |
| tree | 44563dc59fe1d161e41b6dcdeb135a8b6b74e6e5 /board/imgtec | |
| parent | 14b4e1a63e580b1993866ec783d958619d485d9c (diff) | |
| download | u-boot-imx-e174bd74c93637e78eb81048891acd4ea61520a9.zip u-boot-imx-e174bd74c93637e78eb81048891acd4ea61520a9.tar.gz u-boot-imx-e174bd74c93637e78eb81048891acd4ea61520a9.tar.bz2 | |
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 <paul.burton@imgtec.com>
Diffstat (limited to 'board/imgtec')
| -rw-r--r-- | board/imgtec/malta/lowlevel_init.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/board/imgtec/malta/lowlevel_init.S b/board/imgtec/malta/lowlevel_init.S index 1af34f1..ae09c27 100644 --- a/board/imgtec/malta/lowlevel_init.S +++ b/board/imgtec/malta/lowlevel_init.S @@ -12,6 +12,7 @@ #include <asm/addrspace.h> #include <asm/regdef.h> #include <asm/malta.h> +#include <asm/mipsregs.h> #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) |