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| author | Daniel J Blueman <daniel@numascale.com> | 2015-09-21 12:02:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-09-22 22:25:33 +0200 |
| commit | ce2e572cfe7b2fc3f0e9da4aa7bc61a2c2c51fc7 (patch) | |
| tree | 8d037ccc10d66e35604cbca935c5e1295944d069 /arch/x86/include/asm/numachip | |
| parent | x86/numachip: Add Numachip IPI optimisations (diff) | |
| download | linux-ce2e572cfe7b2fc3f0e9da4aa7bc61a2c2c51fc7.tar.xz linux-ce2e572cfe7b2fc3f0e9da4aa7bc61a2c2c51fc7.zip | |
x86/numachip: Introduce Numachip2 timer mechanisms
Add 1GHz 64-bit Numachip2 clocksource timer support for accurate
system-wide timekeeping, as core TSCs are unsynchronised.
Additionally, add a per-core clockevent mechanism that interrupts via the
platform IPI vector after a programmed period.
[ tglx: Taking it through x86 due to dependencies ]
Signed-off-by: Daniel J Blueman <daniel@numascale.com>
Acked-by: Steffen Persvold <sp@numascale.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: http://lkml.kernel.org/r/1442829745-29311-1-git-send-email-daniel@numascale.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/numachip')
| -rw-r--r-- | arch/x86/include/asm/numachip/numachip_csr.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/asm/numachip/numachip_csr.h b/arch/x86/include/asm/numachip/numachip_csr.h index e09d845ce406..29719eecdc2e 100644 --- a/arch/x86/include/asm/numachip/numachip_csr.h +++ b/arch/x86/include/asm/numachip/numachip_csr.h @@ -59,6 +59,10 @@ static inline void write_lcsr(unsigned long offset, unsigned int val) #define NUMACHIP2_LCSR_BASE 0xf0000000UL #define NUMACHIP2_LCSR_SIZE 0x1000000UL #define NUMACHIP2_APIC_ICR 0x100000 +#define NUMACHIP2_TIMER_DEADLINE 0x200000 +#define NUMACHIP2_TIMER_INT 0x200008 +#define NUMACHIP2_TIMER_NOW 0x200018 +#define NUMACHIP2_TIMER_RESET 0x200020 static inline void __iomem *numachip2_lcsr_address(unsigned long offset) { @@ -86,4 +90,9 @@ static inline void numachip2_write64_lcsr(unsigned long offset, u64 val) writeq(val, numachip2_lcsr_address(offset)); } +static inline unsigned int numachip2_timer(void) +{ + return (smp_processor_id() % 48) << 6; +} + #endif /* _ASM_X86_NUMACHIP_NUMACHIP_CSR_H */ |