linux-sg2042/arch/mips/dec
Maciej W. Rozycki 36de48de85 [MIPS] DECstation: Optimised early printk()
This is an optimised implementation of early printk() for the DECstation.  
After the recent conversion to a MIPS-specific generic routine using a 
character-by-character output the performance dropped significantly.  
This change reverts to the previous speed -- even at 9600 bps of the 
serial console the difference is visible with a naked eye; I presume for a 
framebuffer it is even worse (it may depend on exactly which one is used 
though).

 Additionally the change includes a fix for a problem that the old 
implementation had -- the format used would not actually limit the length 
of the string output.  This new implementation uses a local buffer to deal 
with it -- even with this additional copying it is much faster than the 
generic function.

 Plus this driver is registered much earlier than the generic one, 
allowing one to see critical messages, such as one about an incorrect CPU 
setting used, that are produced beforehand. :-)

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-10 17:33:00 +01:00
..
prom [MIPS] DECstation: Optimised early printk() 2007-07-10 17:33:00 +01:00
Makefile [MIPS] Kill redundant EXTRA_AFLAGS 2007-02-26 23:06:05 +00:00
ecc-berr.c [MIPS] *-berr: Header inclusions for DEC bus error handlers 2006-12-06 20:16:09 +00:00
int-handler.S [MIPS] DECstation: Fix irq handling 2007-02-13 22:40:51 +00:00
ioasic-irq.c [MIPS] use name instead of typename for each irq_chip 2007-02-06 16:53:14 +00:00
kn01-berr.c [MIPS] *-berr: Header inclusions for DEC bus error handlers 2006-12-06 20:16:09 +00:00
kn02-irq.c [MIPS] use name instead of typename for each irq_chip 2007-02-06 16:53:14 +00:00
kn02xa-berr.c [MIPS] DEC: pt_regs fixes for buserror handlers 2006-10-09 00:15:28 +01:00
promcon.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
reset.c [MIPS] Transform old-style macros to newer "__noreturn" 2007-07-10 17:32:56 +01:00
setup.c [TC] TURBOchannel support for the DECstation 2007-02-09 16:23:16 +00:00
tc.c [TC] TURBOchannel support for the DECstation 2007-02-09 16:23:16 +00:00
time.c [MIPS] mips HPT cleanup: make clocksource_mips public 2006-11-30 01:14:49 +00:00
wbflush.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00