3171a0305d
Pass ticks to do_timer() and update_times(), and adjust x86_64 and s390
timer interrupt handler with this change.
Currently update_times() calculates ticks by "jiffies - wall_jiffies", but
callers of do_timer() should know how many ticks to update. Passing ticks
get rid of this redundant calculation. Also there are another redundancy
pointed out by Martin Schwidefsky.
This cleanup make a barrier added by
5aee405c66 needless. So this patch removes
it.
As a bonus, this cleanup make wall_jiffies can be removed easily, since now
wall_jiffies is always synced with jiffies. (This patch does not really
remove wall_jiffies. It would be another cleanup patch)
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This port to the NEC V850E processor supports the following platforms:
"sim"
The gdb v850e simulator (CONFIG_V850E_SIM).
"rte-ma1-cb"
The Midas labs RTE-V850E/MA1-CB and RTE-V850E/NB85E-CB evaluation
boards (CONFIG_RTE_CB_MA1 and CONFIG_RTE_CB_NB85E). This support
has only been tested when running with the Multi-debugger monitor
ROM (for the Green Hills Multi debugger). The optional NEC
Solution Gear RTE-MOTHER-A motherboard is also supported, which
allows PCI boards to be used (CONFIG_RTE_MB_A_PCI).
"rte-me2-cb"
The Midas labs RTE-V850E/ME2-CB evaluation board (CONFIG_RTE_CB_ME2).
This has only been tested using a kernel downloaded via an ICE
connection using the Multi debugger. Support for the RTE-MOTHER-A is
present, but hasn't been tested (unlike the other Midas labs cpu
boards, the RTE-V850E/ME2-CB includes an ethernet adaptor).
"as85ep1"
The NEC AS85EP1 V850E evaluation chip/board (CONFIG_V850E_AS85EP1).
"anna"
The NEC `Anna' (board/chip) implementation of the V850E2 processor
(CONFIG_V850E2_ANNA).
"sim85e2c", "sim85e2s"
The sim85e2c and sim85e2s simulators, which are verilog simulations
of the V850E2 NA85E2C/NA85E2S cpu cores (CONFIG_V850E2_SIM85E2C and
CONFIG_V850E2_SIM85E2S).
"fpga85e2c"
A FPGA implementation of the V850E2 NA85E2C cpu core
(CONFIG_V850E2_FPGA85E2C).
To get a default kernel configuration for a particular platform, you can
use a <platform>_defconfig make target (e.g., "make rte-me2-cb_defconfig");
to see which default configurations are possible, look in the directory
"arch/v850/configs".
Porting to anything with a V850E/MA1 or MA2 processor should be simple.
See the file <asm-v850/machdep.h> and the files it includes for an example of
how to add platform/chip-specific support.