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| author |   James Hogan <james.hogan@imgtec.com> | 2015-02-02 11:45:08 +0000 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2015-03-31 12:04:12 +0200 |
| commit | 9b3274bd585c6dff7848119e837bd5ce6c9173e2 (patch) | |
| tree | 2fa7fad86c3d19394a7775c57146da2b303e76c3 /arch/mips/kernel | |
| parent | MIPS: Allow shared IRQ for timer & perf counter (diff) | |
| download | linux-dev-9b3274bd585c6dff7848119e837bd5ce6c9173e2.tar.xz linux-dev-9b3274bd585c6dff7848119e837bd5ce6c9173e2.zip | |
MIPS: Add arch CDMM definitions and probing
Add architectural definitions and probing for the MIPS Common Device
Memory Map (CDMM) region. When supported and enabled at a particular
physical address, this region allows some number of per-CPU devices to
be discovered and controlled via MMIO.
A bit exists in Config3 to determine whether the feature is present, and
a CDMMBase CP0 register allows the region to be enabled at a particular
physical address.
[ralf@linux-mips.org: Sort conflict with other patches.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9178/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 48dfb9de853d..1bae00678b9b 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -441,6 +441,8 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c) c->htw_seq = 0; c->options |= MIPS_CPU_HTW; } + if (config3 & MIPS_CONF3_CDMM) + c->options |= MIPS_CPU_CDMM; return config3 & MIPS_CONF_M; } |