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| author | Franck Bui-Huu <fbuihuu@gmail.com> | 2007-02-02 17:41:47 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-22 01:50:44 +0100 |
| commit | 9693a85378b590cc7a4aa2db2174422585c7c8c4 (patch) | |
| tree | 43d031f8e555d9276e68bdb158bd264c2d260346 /include/asm-mips/sigcontext.h | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6 (diff) | |
| download | linux-9693a85378b590cc7a4aa2db2174422585c7c8c4.tar.xz linux-9693a85378b590cc7a4aa2db2174422585c7c8c4.zip | |
[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 'include/asm-mips/sigcontext.h')
| -rw-r--r-- | include/asm-mips/sigcontext.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-mips/sigcontext.h b/include/asm-mips/sigcontext.h index 972947474eb7..9ce0607d7a4e 100644 --- a/include/asm-mips/sigcontext.h +++ b/include/asm-mips/sigcontext.h @@ -23,7 +23,7 @@ struct sigcontext { unsigned long long sc_pc; unsigned long long sc_regs[32]; unsigned long long sc_fpregs[32]; - unsigned int sc_ownedfp; /* Unused */ + unsigned int sc_acx; /* Was sc_ownedfp */ unsigned int sc_fpc_csr; unsigned int sc_fpc_eir; /* Unused */ unsigned int sc_used_math; @@ -79,7 +79,7 @@ struct sigcontext32 { __u64 sc_pc; __u64 sc_regs[32]; __u64 sc_fpregs[32]; - __u32 sc_ownedfp; /* Unused */ + __u32 sc_acx; /* Only MIPS32; was sc_ownedfp */ __u32 sc_fpc_csr; __u32 sc_fpc_eir; /* Unused */ __u32 sc_used_math; |