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linux-xiaomi-chiron/arch/mips/kernel
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Ralf Baechle 5aa85c9fc4 [MIPS] Handle R4000/R4400 mfc0 from count register. 
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 17:26:14 +00:00
..
8250-platform.c
asm-offsets.c
binfmt_elfn32.c
binfmt_elfo32.c [MIPS] checkfiles: Fix "need space after that ','" errors. 2007-10-11 23:46:15 +01:00
branch.c
cevt-bcm1480.c [MIPS] Sibyte: Stop timers before programming next even. 2007-11-15 23:21:50 +00:00
cevt-gt641xx.c [MIPS] time: set clock before clockevent_delta2ns() in GT641xx. 2007-10-29 19:35:33 +00:00
cevt-r4k.c [MIPS] Handle R4000/R4400 mfc0 from count register. 2007-11-26 17:26:14 +00:00
cevt-sb1250.c [MIPS] Sibyte: Stop timers before programming next even. 2007-11-15 23:21:50 +00:00
cevt-txx9.c [MIPS] txx9tmr clockevent/clocksource driver 2007-10-29 19:35:35 +00:00
cpu-bugs64.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
cpu-probe.c [MIPS] Fix shadow register support. 2007-11-15 23:21:49 +00:00
csrc-bcm1480.c [MIPS] Sibyte: Split and move clock code. 2007-11-02 16:13:47 +00:00
csrc-sb1250.c [MIPS] Sibyte: Fix name of clocksource. 2007-11-15 23:21:51 +00:00
early_printk.c
entry.S
gdb-low.S
gdb-stub.c [MIPS] Kill num_online_cpus() loops. 2007-10-11 23:46:18 +01:00
genex.S [MIPS] Fix typo in R3000 TRACE_IRQFLAGS code 2007-11-15 23:21:49 +00:00
head.S [MIPS] Always do the ARC64_TWIDDLE_PC thing. 2007-10-18 18:11:46 +01:00
i8253.c Use i8253.c lock for PC speaker on MIPS, too. 2007-11-02 19:39:18 -07:00
i8259.c [MIPS] checkfiles: Fix "need space after that ','" errors. 2007-10-11 23:46:15 +01:00
init_task.c
irix5sys.S
irixelf.c pid namespaces: round up the API 2007-10-19 11:53:37 -07:00
irixinv.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
irixioctl.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
irixsig.c mips: undo locking on error path returns 2007-11-14 18:45:42 -08:00
irq-gt641xx.c
irq-msc01.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
irq-rm7000.c [MIPS] irq_cpu: use handle_percpu_irq handler to avoid dropping interrupts. 2007-11-15 23:21:52 +00:00
irq-rm9000.c [MIPS] irq_cpu: use handle_percpu_irq handler to avoid dropping interrupts. 2007-11-15 23:21:52 +00:00
irq.c [MIPS] checkfiles: Fix "need space after that ','" errors. 2007-10-11 23:46:15 +01:00
irq_cpu.c [MIPS] irq_cpu: use handle_percpu_irq handler to avoid dropping interrupts. 2007-11-15 23:21:52 +00:00
irq_txx9.c
kspd.c [MIPS] checkfiles: Fix "need space after that ','" errors. 2007-10-11 23:46:15 +01:00
linux32.c remove include/asm-*/ipc.h 2007-10-17 08:42:55 -07:00
machine_kexec.c
Makefile [MIPS] Sibyte: Split and move clock code. 2007-11-02 16:13:47 +00:00
mips-mt-fpaff.c
mips-mt.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
mips_ksyms.c
module.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pcspeaker.c
proc.c [MIPS] Fix shadow register support. 2007-11-15 23:21:49 +00:00
process.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
ptrace.c [MIPS] Store sign-extend register values for PTRACE_GETREGS 2007-10-29 19:35:36 +00:00
ptrace32.c [MIPS] Store sign-extend register values for PTRACE_GETREGS 2007-10-29 19:35:36 +00:00
r4k_fpu.S
r4k_switch.S
r2300_fpu.S
r2300_switch.S
r6000_fpu.S
relocate_kernel.S
reset.c
rtlx.c
scall32-o32.S
scall64-64.S
scall64-n32.S [MIPS] N32 needs to use the compat version of sys_nfsservctl. 2007-11-15 23:21:52 +00:00
scall64-o32.S
semaphore.c
setup.c
signal-common.h
signal.c [MIPS] checkfiles: Fix "need space after that ','" errors. 2007-10-11 23:46:15 +01:00
signal32.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
signal_n32.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
smp-mt.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
smp.c [MIPS] SMP: Fix use of cpumasks. 2007-10-13 00:53:01 +01:00
smtc-asm.S
smtc-proc.c
smtc.c [MIPS] SMTC: Allow control over TC assignment to vpe0. 2007-10-29 19:35:32 +00:00
stacktrace.c
syscall.c [MIPS] Add len and addr validation for MAP_FIXED mappings. 2007-10-29 19:35:36 +00:00
sysirix.c pid namespaces: round up the API 2007-10-19 11:53:37 -07:00
time.c [MIPS] Handle R4000/R4400 mfc0 from count register. 2007-11-26 17:26:14 +00:00
topology.c
traps.c [MIPS] Fix shadow register support. 2007-11-15 23:21:49 +00:00
unaligned.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
vmlinux.lds.S [MIPS] vmlinux.ld.S: correctly indent .data section 2007-10-29 19:35:37 +00:00
vpe.c [MIPS] vpe: handle halting TCs in an errata safe way. 2007-11-15 23:21:50 +00:00