[aarch64-port-dev ] RFR: JDK 7: Add support for large code cache

[Edward Nevill]

Hi,

The following webrev adds support for large code caches (>128M) to JDK 7 for aarch64.

http://cr.openjdk.java.net/~enevill/jdk7_largecode/webrev.01/

Tested with jtreg hotspot & langtools

hotspot(original): Test results: passed: 297; failed: 12; error: 2
hotspot(256m cache): Test results: passed: 298; failed: 11; error: 2

langtools(original): Test results: passed: 1,973; failed: 1
langtools(256m cache): Test results: passed: 1,973; failed: 1

OK to push?
Ed.