Add support for AArch32

gcc version 4.9.2 (Raspbian 4.9.2-10)
Tested on Linux raspberrypi 4.4.6-v7+ #875 SMP Tue Apr 12 16:33:02 BST 2016 armv7l GNU/Linux

CPUs may be little or big endian, detect with gcc flags, not the processor architecture
Add a new flag $(PLATFORM)_uses_openssl which allows to disable the link with openssl lib.

vlib/vlib/threads.c:
startup.conf must:
- specify the heapsize as we don't have hugepages on raspbian

cpu {
  main-core 3
}
heapsize 64M

Corrects in various files the assumption uword == u64 and replaces 'u64' cast with 'pointer_to_uword' and 'uword_to_pointer' where appropriate.
256 CPUs may create an OOM when testing with small memory footprint ( heapsize 64M ), allows the number of VLIB_MAX_CPUS to be set in platforms/*.mk

vppinfra/vppinfra/longjmp.S:
ARM - copy r1 (1st parameter of the setjmp call) to r0 (return value)

vppinfra/vppinfra/time.h:
On ARMv7 in AArch32 mode, we can access to a 64bit register to retreive the cycles count.
gcc on rpi only declare ARM_ARCH 6. Override this info, and check if it is possible to use 'mrrc'.
/!\ the time function will NOT work without allowing the user mode access to the PMU.
You may download the source of the kmod here:
https://github.com/christophefontaine/arm_rdtsc

Change-Id: I8142606436d9671a184133b935398427f08a8bd2
Signed-off-by: Christophe Fontaine <christophe.fontaine@qosmos.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/vppapigen/node.c b/vppapigen/node.c
index 966ff817359..3a32abec63b 100644
--- a/vppapigen/node.c
+++ b/vppapigen/node.c
@@ -285,8 +285,8 @@ void primtype_java_code (node_t * this, enum passid which, FILE *ofp,
             indent_me(ofp);
             fprintf(ofp, "int _i;\n");
             indent_me(ofp);
-            fprintf(ofp, "for (_i = 0; _i < %d; _i++) {\n", 
-                    (int)(u64)(deeper->data[1]));
+            fprintf(ofp, "for (_i = 0; _i < %u; _i++) {\n",
+                    (u64)(deeper->data[1]));
             indent += 4;
             indent_me(ofp);
             fprintf(ofp, "mp->%s[_i] = %s(%sP[_i]);\n",