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arm64: add smp_processor_id() declaration

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In order to accomodate MP on arm64 one needs to be able to determine
the current logical processor id. Because it depends on the SoC
implementation the SoC needs to provide this implementation.

BUG=chrome-os-partner:31545
BRANCH=None
TEST=Built.

Change-Id: I9511b54b5a1ab340b0f1309b0d9976be68b50903
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/214663
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aaron Durbin 2014-08-27 10:26:15 -05:00 • committed by chrome-internal-fetch
commit 6033e73d70
1 changed files with 9 additions and 6 deletions
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15
src/arch/arm64/include/armv8/arch/cpu.h
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@ -40,13 +40,16 @@ struct cpu_info {
#endif
};
struct cpuinfo_arm {
uint8_t arm; /* CPU family */
uint8_t arm_vendor; /* CPU vendor */
uint8_t arm_model;
};
#endif
struct cpu_info *cpu_info(void);
/*
* Returns logical cpu in range [0:MAX_CPUS). SoC should define this.
* Additionally, this is needed early in arm64 init so it should not
* rely on a stack. Standard clobber list is fair game: x0-x7 and x0
* returns the logical cpu number.
*/
unsigned int smp_processor_id(void);
#endif /* __ARCH_CPU_H__ */