Commit Graph

8 Commits

Author SHA1 Message Date
Paul Mundt
0bf8513ed0 sh: Tidy up SH-4A boot_cpu_data.flags probing.
This tidies up the boot_cpu_data.flags probing on SH-4A. All of them have
a few things in common, which we can blindly set, rather than having each
subtype have to set the same flags. We can also make assumptions about
cache ways and the validity of PTEA, so this also kills off CPU_HAS_PTEA
as a config option. There was also a bug in the FPU probing, which is now
tidied up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-06-01 19:50:08 +09:00
Paul Mundt
c29418c2ae sh: Always fixup unaligned userspace accesses on sh64.
sh64 has traditionally had this configurable via a Kconfig option
(CONFIG_SH64_USER_MISALIGNED_FIXUP). In practice it has never really been
terribly useful to turn this off, so just get rid of the option entirely.

We leave the sysctl around so we don't end up breaking existing root
file systems, and to allow folks that really want this off to do so at
their own risk.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-05-08 20:32:56 +09:00
Paul Mundt
8263a67e16 sh: Support for extended ASIDs on PTEAEX-capable SH-X3 cores.
This adds support for extended ASIDs (up to 16-bits) on newer SH-X3 cores
that implement the PTAEX register and respective functionality. Presently
only the 65nm SH7786 (90nm only supports legacy 8-bit ASIDs).

The main change is in how the PTE is written out when loading the entry
in to the TLB, as well as in how the TLB entry is selectively flushed.

While SH-X2 extended mode splits out the memory-mapped U and I-TLB data
arrays for extra bits, extended ASID mode splits out the address arrays.
While we don't use the memory-mapped data array access, the address
array accesses are necessary for selective TLB flushes, so these are
implemented newly and replace the generic SH-4 implementation.

With this, TLB flushes in switch_mm() are almost non-existent on newer
parts.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-03-17 17:49:49 +09:00
Paul Mundt
64e34ca99a sh: Disable big endian for SH-5.
All SH-5 machines are little endian.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14 14:22:10 +09:00
Magnus Damm
d847afe7d4 sh: remove maskreg irq code
This patch removes the maskreg irq code since it is not in use anymore.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14 14:22:10 +09:00
Harvey Harrison
d7ef4fb3ac sh: Use def_bool where possible.
Change occurances of:
	bool
	default X

to:
	def_bool X

Change ocurances of:
	bool "Foo"
	default X

to:
	def_bool X
	prompt "Foo"

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:19:00 +09:00
Paul Mundt
ea0e1a9a3d sh: Consolidate Kconfig.sh/Kconfig.sh64.
Fold in the sh64-specific bits in to the main Kconfig.sh, and move
this back as arch/sh/Kconfig.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:18:52 +09:00
Paul Mundt
4690bdc7c6 sh: Consolidate CPU features in Kconfig.cpu.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:18:41 +09:00