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MIPS: Abstract CPU core & VP(E) ID access through accessor functions

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We currently have fields in struct cpuinfo_mips for the core & VP(E) ID
of a particular CPU, and various pieces of code directly access those
fields. This patch abstracts such access by introducing accessor
functions cpu_core(), cpu_set_core(), cpu_vpe_id() & cpu_set_vpe_id()
and having code that needs to access these values call those functions
rather than directly accessing the struct cpuinfo_mips fields. This
prepares us for changes to the way in which those values are stored in
later patches.

The cpu_vpe_id() function is introduced even though we already had a
cpu_vpe_id() macro for a couple of reasons:

  1) It's more consistent with the core, and future cluster, accessors.

  2) It ensures a sensible return type without explicit casts.

  3) It's generally preferable to use functions rather than macros.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17009/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2017-08-12 19:49:35 -07:00
committed by Ralf Baechle
parent 15e6529fc3
commit f875a832d2
16 changed files with 71 additions and 46 deletions
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27
arch/mips/include/asm/cpu-info.h
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@@ -144,11 +144,32 @@ struct proc_cpuinfo_notifier_args {
unsigned long n;
};
static inline unsigned int cpu_core(struct cpuinfo_mips *cpuinfo)
{
return cpuinfo->core;
}
static inline void cpu_set_core(struct cpuinfo_mips *cpuinfo,
unsigned int core)
{
cpuinfo->core = core;
}
static inline unsigned int cpu_vpe_id(struct cpuinfo_mips *cpuinfo)
{
#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
# define cpu_vpe_id(cpuinfo) ((cpuinfo)->vpe_id)
#else
# define cpu_vpe_id(cpuinfo) ({ (void)cpuinfo; 0; })
return cpuinfo->vpe_id;
#endif
return 0;
}
static inline void cpu_set_vpe_id(struct cpuinfo_mips *cpuinfo,
unsigned int vpe)
{
#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
cpuinfo->vpe_id = vpe;
#endif
}
static inline unsigned long cpu_asid_inc(void)
{