memstart_addr is now used by lrdp-v2 to retrieve lowmem page
address, but the variable is only defined on ARM64. Add code for
retrieving the same information on ARM32

Change-Id: I825b318962751b1b948df9cb948149e47e3fdf50

Modify page_address() to support KASLR

Change-Id: I169ed0204ef7ef1110ce2626cabb1bf62774b312

Add a utility function for iterating through all valid pages.
Use it in --print-pagetracking to fix an issue where invalid pfn numbers
are being used.

Change-Id: Iea87fd9afe2515c0be47ae32fa19db0aff5f3403

The stack trace saved by PAGE_OWNER is only set for the first pfn in a page
even if it has order > 0. Previously, invalid stack traces were printed out
for "tail pages".

Change-Id: I65162c7d4220348759525871f0c1d708098ffc2d
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

KASLR randomizes the address of the linear kernel mapping, which
causes the starting address of vmemmap to be similarly randomized.
Use the value of memstart_addr in calculations instead of phys_offset.

Change-Id: I905c0f50e011f85871ca2406b9a5d78afe4f0dc6

Linux Kernel 4.9, VMEMMAP_SIZE calculation has changed and modified
lrdp to calculate similarly

Change-Id: If076c033a877f18ea0fa654ab591296eb335b12b

Config value is changed from CONFIG_ARM64_PGTABLE_LEVELS
to CONFIG_PGTABLE_LEVELS in 3.18.
vmemmap is shifted to base addr (0x80000000):
commit ab754494cbe4dd44a9e1354b3d93c8d5d5139aad

Change-Id: Ib6fa6e1b780db5117f8a750003216794d9cedeea

Rename addr_lookup to address_of to match common terminology more
closely.

Change-Id: I7fc744ce88d1f8880f13dfbf83fb0efcbe9ba0f2

We're currently using a hard-coded value for vmemmap.  This doesn't work
anymore.  Calculate its value dynamically the same way the kernel does
it.

Change-Id: If3e06007ab69c2ee91fefede770c2fb5ccb59fe3

The pfn_offset variable in pfn_to_page_vmemmap is not used.  Remove it.

Change-Id: I9d8379916252c9fa5bef290378f802b82df86a35

-page structures have a field for debug flags
-These flags are useful to determine if a page is poisoned
-get debug_flags value from page structure
-page is poisoned if value is 1

Change-Id: Ieeec9ca437b3ea5e20dc0c93150a60cd99e47535

Many of the mm functions need minor tweaks to work with arm64:
- reading 32-bit ints instead of 64-bit words
- using proper page offsets
- vmemmap instead of sparsemem

Update these functions.

Change-Id: I407fdf84c64dbfed870a95fd439bef28598714cb

When calculating pfn_to_page, the pfn needs to be offset before
indexing into the array. Account for this.

Change-Id: If207447a91537ab7670058fede65473d3ea93281

Older targets use a slightly different version of map around the hole
which has different variable names. Account for this in the code.

Change-Id: Ia657b265dc6f34c9fb33f71c1ef62dbf0c0c2114

After a crash, ramdumps may be collected for analysis. The ram
parser is a tool to aid in analysis of these dumps. The script
extracts useful information from the dumps to help with debugging.
Please see the README for full details.

Change-Id: I7795686a96bbfe246edf47d09e3f616131688429