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c947a585ab
linux/arch/xtensa/include/asm
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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
..
asmmacro.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
atomic.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6 2009-01-07 11:56:29 -08:00
auxvec.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
bitops.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6 2009-01-07 11:56:29 -08:00
bootparam.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
bug.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
bugs.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
byteorder.h byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
cache.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
cacheasm.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
cacheflush.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
checksum.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
coprocessor.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
cpumask.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
cputime.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
current.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
delay.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
device.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
div64.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
dma-mapping.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
dma.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
elf.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
emergency-restart.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
errno.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
fb.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
fcntl.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
futex.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
hardirq.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
highmem.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
hw_irq.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
io.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
ioctl.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
ioctls.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
ipcbuf.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
irq_regs.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
irq.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
Kbuild byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
kdebug.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
kmap_types.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
linkage.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
local.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
mman.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
mmu_context.h xtensa: remove redefinition of XCHAL_MMU_ASID_BITS 2009-04-02 23:38:10 -07:00
mmu.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
module.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
msgbuf.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
mutex.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
page.h xtensa: cope with ram beginning at higher addresses 2009-04-02 23:41:08 -07:00
param.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
pci-bridge.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
pci.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
percpu.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
pgalloc.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
pgtable.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
platform.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
poll.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
posix_types.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
processor.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
ptrace.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
regs.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
resource.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
rmap.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
rwsem.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
scatterlist.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
sections.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
segment.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
sembuf.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
serial.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
setup.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
shmbuf.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
shmparam.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
sigcontext.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
siginfo.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
signal.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
smp.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
socket.h net: new user space API for time stamping of incoming and outgoing packets 2009-02-15 22:43:33 -08:00
sockios.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
spinlock.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
stat.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
statfs.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
string.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
swab.h headers_check fix: xtensa, swab.h 2009-02-01 11:01:30 +05:30
syscall.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
system.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
termbits.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
termios.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
thread_info.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
timex.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
tlb.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
tlbflush.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
topology.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
types.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
uaccess.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
ucontext.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
unaligned.h xtensa: switch to packed struct unaligned access implementation 2008-11-11 06:14:10 -08:00
unistd.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
user.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
vga.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00
xor.h xtensa: move headers files to arch/xtensa/include 2008-11-06 10:25:09 -08:00