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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 00:50:44 +0000 |
| commit | 9693a85378b590cc7a4aa2db2174422585c7c8c4 (patch) | |
| tree | 43d031f8e555d9276e68bdb158bd264c2d260346 /arch/mips/kernel/asm-offsets.c | |
| parent | 9654640d0af8f2de40ff3807d3695109d3463f54 (diff) | |
| download | linux-9693a85378b590cc7a4aa2db2174422585c7c8c4.tar.gz linux-9693a85378b590cc7a4aa2db2174422585c7c8c4.tar.bz2 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 'arch/mips/kernel/asm-offsets.c')
| -rw-r--r-- | arch/mips/kernel/asm-offsets.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index c0b089d47181..222de465db73 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -64,6 +64,9 @@ void output_ptreg_defines(void) offset("#define PT_R31 ", struct pt_regs, regs[31]); offset("#define PT_LO ", struct pt_regs, lo); offset("#define PT_HI ", struct pt_regs, hi); +#ifdef CONFIG_CPU_HAS_SMARTMIPS + offset("#define PT_ACX ", struct pt_regs, acx); +#endif offset("#define PT_EPC ", struct pt_regs, cp0_epc); offset("#define PT_BVADDR ", struct pt_regs, cp0_badvaddr); offset("#define PT_STATUS ", struct pt_regs, cp0_status); @@ -246,6 +249,7 @@ void output_sc_defines(void) text("/* Linux sigcontext offsets. */"); offset("#define SC_REGS ", struct sigcontext, sc_regs); offset("#define SC_FPREGS ", struct sigcontext, sc_fpregs); + offset("#define SC_ACX ", struct sigcontext, sc_acx); offset("#define SC_MDHI ", struct sigcontext, sc_mdhi); offset("#define SC_MDLO ", struct sigcontext, sc_mdlo); offset("#define SC_PC ", struct sigcontext, sc_pc); |