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sparc64: Abstract away the NMI PIC counter computation.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-08-16 23:26:01 -07:00
parent 09d053c797
commit 73a6b0538c
3 changed files with 20 additions and 19 deletions
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15
arch/sparc/include/asm/pcr.h
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@@ -6,6 +6,7 @@ struct pcr_ops {
void (*write_pcr)(unsigned long, u64);
u64 (*read_pic)(unsigned long);
void (*write_pic)(unsigned long, u64);
u64 (*nmi_picl_value)(unsigned int nmi_hz);
};
extern const struct pcr_ops *pcr_ops;
@@ -29,20 +30,6 @@ extern void schedule_deferred_pcr_work(void);
#define PCR_N2_SL1_SHIFT 27
#define PCR_N2_OV1 0x80000000
extern unsigned int picl_shift;
/* In order to commonize as much of the implementation as
* possible, we use PICH as our counter. Mostly this is
* to accommodate Niagara-1 which can only count insn cycles
* in PICH.
*/
static inline u64 picl_value(unsigned int nmi_hz)
{
u32 delta = local_cpu_data().clock_tick / (nmi_hz << picl_shift);
return ((u64)((0 - delta) & 0xffffffff)) << 32;
}
extern u64 pcr_enable;
extern int pcr_arch_init(void);