linux/arch/sh
Matt Fleming a2767cfb1d sh: Don't allocate smaller sized mappings on every iteration
Currently, we've got the less than ideal situation where if we need to
allocate a 256MB mapping we'll allocate four entries like so,

	 entry 1: 128MB
	 entry 2:  64MB
	 entry 3:  16MB
	 entry 4:  16MB

This is because as we execute the loop in pmb_remap() we will
progressively try mapping the remaining address space with smaller and
smaller sizes. This isn't good because the size we use on one iteration
may be the perfect size to use on the next iteration, for instance when
the initial size is divisible by one of the PMB mapping sizes.

With this patch, we now only need two entries in the PMB to map 256MB of
address space,

	  entry 1: 128MB
	  entry 2: 128MB

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-09 11:26:35 +09:00
..
boards sh: enable sleep state LEDs on Ecovec24 2009-10-09 11:14:21 +09:00
boot kbuild: use INSTALLKERNEL to select customized installkernel script 2009-09-20 12:18:14 +02:00
cchips sh: mach-hp6xx: Fix up the hp6xx build for hd64461 changes. 2009-05-20 11:27:13 +09:00
configs sh: enable onenand support in kfr2r09 defconfig. 2009-09-25 11:55:07 +09:00
drivers Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx into for-linus 2009-09-23 18:31:11 +10:00
include Merge branch 'for-linus' of git://neil.brown.name/md 2009-09-24 07:55:29 -07:00
kernel sh: Build fix: export __movmem 2009-09-30 15:41:42 +09:00
lib sh: Kill off dcache writeback from copy_page(). 2009-09-08 16:23:08 +09:00
lib64 sh64: Kill off special clear_page() implementation. 2009-08-04 17:17:00 +09:00
math-emu sh: Fix up the math-emu build. 2007-06-11 15:57:42 +09:00
mm sh: Don't allocate smaller sized mappings on every iteration 2009-10-09 11:26:35 +09:00
oprofile sh: oprofile: Kill off dead valid_kernel_stack(). 2009-08-14 04:59:50 +09:00
tools sh: sh7785lcr: fix prototype board on 32bit MMU mode. 2009-08-28 10:19:13 +09:00
Kconfig perf: Do the big rename: Performance Counters -> Performance Events 2009-09-21 14:28:04 +02:00
Kconfig.cpu sh: Tidy up SH-4A boot_cpu_data.flags probing. 2009-06-01 19:50:08 +09:00
Kconfig.debug sh: Add initial support for SH7757 CPU subtype 2009-08-21 17:25:47 +09:00
Makefile sh: Add EcoVec (SH7724) board support 2009-08-20 10:13:16 +09:00