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| author | David S. Miller <davem@davemloft.net> | 2012-04-13 13:32:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-13 13:32:07 -0700 |
| commit | 3423166fdbc2444bf3a4a27af1d7508364a17be7 (patch) | |
| tree | 0a42bd5fbe6bcca79802bf1ec5af6acf12aadd82 /arch/sparc/include/asm/perfctr.h | |
| parent | e9b57cca3dbdc7a0b90514af8bf613baf97105a5 (diff) | |
| parent | 7d93101fc71ec47c7cc66ac99f76ef795c5207aa (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Diffstat (limited to 'arch/sparc/include/asm/perfctr.h')
| -rw-r--r-- | arch/sparc/include/asm/perfctr.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/perfctr.h b/arch/sparc/include/asm/perfctr.h index 8d8720a8770d..3332d2cba6c1 100644 --- a/arch/sparc/include/asm/perfctr.h +++ b/arch/sparc/include/asm/perfctr.h @@ -168,6 +168,29 @@ struct vcounter_struct { unsigned long long vcnt1; }; +#else /* !(__KERNEL__) */ + +#ifndef CONFIG_SPARC32 + +/* Performance counter register access. */ +#define read_pcr(__p) __asm__ __volatile__("rd %%pcr, %0" : "=r" (__p)) +#define write_pcr(__p) __asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (__p)) +#define read_pic(__p) __asm__ __volatile__("rd %%pic, %0" : "=r" (__p)) + +/* Blackbird errata workaround. See commentary in + * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt() + * for more information. + */ +#define write_pic(__p) \ + __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \ + " nop\n\t" \ + ".align 64\n" \ + "99:wr %0, 0x0, %%pic\n\t" \ + "rd %%pic, %%g0" : : "r" (__p)) +#define reset_pic() write_pic(0) + +#endif /* !CONFIG_SPARC32 */ + #endif /* !(__KERNEL__) */ #endif /* !(PERF_COUNTER_API) */ |