diff options
author | Franck Bui-Huu <fbuihuu@gmail.com> | 2007-02-02 11:41:47 -0500 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-21 19:50:44 -0500 |
commit | 9693a85378b590cc7a4aa2db2174422585c7c8c4 (patch) | |
tree | 43d031f8e555d9276e68bdb158bd264c2d260346 /arch/mips/configs/atlas_defconfig | |
parent | 9654640d0af8f2de40ff3807d3695109d3463f54 (diff) |
[MIPS] Add basic SMARTMIPS ASE support
This patch adds trivial support for SMARTMIPS extension. This extension
is currently implemented by 4KS[CD] CPUs.
Basically it saves/restores ACX register, which is part of the SMARTMIPS
ASE, when needed. This patch does *not* add any support for Smartmips MMU
features.
Futhermore this patch does not add explicit support for 4KS[CD] CPUs since
they are respectively mips32 and mips32r2 compliant. So with the current
processor configuration, a platform that has such CPUs needs to select
both configs:
CPU_HAS_SMARTMIPS
SYS_HAS_CPU_MIPS32_R[12]
This is due to the processor configuration which is mixing up all the
architecture variants and the processor types.
The drawback of this, is that we currently pass '-march=mips32' option to
gcc when building a kernel instead of '-march=4ksc' for 4KSC case. This
can lead to a kernel image a little bit bigger than required.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/configs/atlas_defconfig')
-rw-r--r-- | arch/mips/configs/atlas_defconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/configs/atlas_defconfig b/arch/mips/configs/atlas_defconfig index 45874d1038d3..458894933a4c 100644 --- a/arch/mips/configs/atlas_defconfig +++ b/arch/mips/configs/atlas_defconfig | |||
@@ -139,10 +139,12 @@ CONFIG_MIPS_MT_DISABLED=y | |||
139 | CONFIG_SYS_SUPPORTS_MULTITHREADING=y | 139 | CONFIG_SYS_SUPPORTS_MULTITHREADING=y |
140 | # CONFIG_64BIT_PHYS_ADDR is not set | 140 | # CONFIG_64BIT_PHYS_ADDR is not set |
141 | CONFIG_CPU_HAS_LLSC=y | 141 | CONFIG_CPU_HAS_LLSC=y |
142 | # CONFIG_CPU_HAS_SMARTMIPS is not set | ||
142 | CONFIG_CPU_HAS_SYNC=y | 143 | CONFIG_CPU_HAS_SYNC=y |
143 | CONFIG_GENERIC_HARDIRQS=y | 144 | CONFIG_GENERIC_HARDIRQS=y |
144 | CONFIG_GENERIC_IRQ_PROBE=y | 145 | CONFIG_GENERIC_IRQ_PROBE=y |
145 | CONFIG_CPU_SUPPORTS_HIGHMEM=y | 146 | CONFIG_CPU_SUPPORTS_HIGHMEM=y |
147 | CONFIG_SYS_SUPPORTS_SMARTMIPS=y | ||
146 | CONFIG_ARCH_FLATMEM_ENABLE=y | 148 | CONFIG_ARCH_FLATMEM_ENABLE=y |
147 | CONFIG_SELECT_MEMORY_MODEL=y | 149 | CONFIG_SELECT_MEMORY_MODEL=y |
148 | CONFIG_FLATMEM_MANUAL=y | 150 | CONFIG_FLATMEM_MANUAL=y |