kernel-fxtec-pro1x/arch
Johannes Weiner c947a585ab xtensa: cope with ram beginning at higher addresses
The current assumption of the memory code is that the first RAM PFN in
the system is 0.

Adjust the relevant code to play well with setups where memory starts
at higher addresses, indicated by PLATFORM_DEFAULT_MEM_START.

The new memory model looks like this:

+----------+--+----------------------+----------------+
|          |  |                      |                |
|          |  |         RAM          |                |
|          |  |                      |                |
+----------+--+----------------------+----------------+
|          |  |                      |                |
+- PFN 0   |  +- min_low_pfn         +- max_low_pfn   +- max_pfn
           |
           +- ARCH_PFN_OFFSET
           +- PLATFORM_DEFAULT_MEM_START >> PAGE_SIZE

The memory map contains pages starting from pfn ARCH_PFN_OFFSET up to
max_low_pfn.  The only zone used right now will span exactly the same
region.

Usually, ARCH_PFN_OFFSET and min_low_pfn are the same value.  Handle
them separately for robustness.  Gapping pages will be in the memory
map but marked as reserved and won't be touched.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2009-04-02 23:41:08 -07:00
..
alpha Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-04-01 09:47:12 -07:00
arm V4L/DVB (11034): soc-camera: remove now unused gpio member of struct soc_camera_link 2009-03-30 12:43:22 -03:00
avr32 generic debug pagealloc 2009-04-01 08:59:13 -07:00
blackfin proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
cris cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
frv cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
h8300 cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
ia64 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2009-04-01 13:33:41 -07:00
m32r cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
m68k ide: cleanup <asm-m68k/ide.h> 2009-03-27 12:46:23 +01:00
m68knommu Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
mips bcm47xx: fix GPIO API return codes 2009-04-01 08:59:17 -07:00
mn10300 cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
parisc rtc-parisc: remove unnecessary ret variable 2009-04-01 08:59:25 -07:00
powerpc Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-04-01 09:47:12 -07:00
s390 Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6 2009-04-01 09:22:24 -07:00
sh Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask 2009-03-30 18:00:26 -07:00
sparc mm: use debug_kmap_atomic 2009-04-01 08:59:14 -07:00
um uml: remove useless comments 2009-04-01 08:59:17 -07:00
x86 Merge branch 'x86-setup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-01 12:52:57 -07:00
xtensa xtensa: cope with ram beginning at higher addresses 2009-04-02 23:41:08 -07:00
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