linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2007-11-26	[MIPS] Handle R4000/R4400 mfc0 from count register.	Ralf Baechle	1	-5/+7
	The R4000 and R4400 have an errata where if the cp0 count register is read in the exact moment when it matches the compare register no interrupt will be generated. This bug may be triggered if the cp0 count register is being used as clocksource and the compare interrupt as clockevent. So a simple workaround is to avoid using the compare for both facilities on the affected CPUs. This is different from the workaround suggested in the old errata documents; at some opportunity probably the official version should be implemented and tested. Another thing to find out is which processor versions exactly are affected. I only have errata documents upto R4400 V3.0 available so for the moment the code treats all R4000 and R4400 as broken. This is potencially a problem for some machines that have no other decent clocksource available; this workaround will cause them to fall back to another clocksource, worst case the "jiffies" source.
2007-11-26	[MIPS] time: Fix negated condition in cevt-r4k driver.	Ralf Baechle	1	-1/+1
	Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29	[MIPS] time: Replace plat_timer_setup with modern APIs.	Ralf Baechle	1	-7/+18
	plat_timer_setup is no longer getting called. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29	[MIPS] time: Make c0_compare_int_usable faster	Atsushi Nemoto	1	-4/+10
	Try increasingly longer time periods starting of at 0x10 cycles. This should be fast on hardware and work nicely with emulators. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29	[MIPS] time: Fix cevt-r4k.c for 64-bit kernel	Atsushi Nemoto	1	-2/+2
	The expression "(long)(read_c0_count() - cnt)" can never be a negative value on 64-bit kernel. Cast to "int" before comparison. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29	[MIPS] Add mips_hpt_frequency check to mips_clockevent_init().	Yoichi Yuasa	1	-1/+1
	Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-22	[MIPS] time: Make c0_compare_int_usable more bullet proof	Atsushi Nemoto	1	-2/+2
	Use write_c0_compare(read_c0_count()) to clear interrupt. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-19	[MIPS] SMTC: Build fix.	Ralf Baechle	1	-0/+1
	Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-18	[MIPS] time: Move R4000 clockevent device code to separate configurable file	Ralf Baechle	1	-0/+272
	Signed-off-by: Ralf Baechle <ralf@linux-mips.org>