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>

2 files changed, 9 insertions, 9 deletions

diff --git a/vpp/api/api.c b/vpp/api/api.c
index 37cd57ffc3b..b47214f049d 100644
--- a/vpp/api/api.c
+++ b/vpp/api/api.c
@@ -3314,7 +3314,7 @@ static void vl_api_cli_request_t_handler
     rp->_vl_msg_id = ntohs(VL_API_CLI_REPLY);
     rp->context = mp->context;
 
-    unformat_init_vector (&input, (u8 *)mp->cmd_in_shmem);
+    unformat_init_vector (&input, (u8 *)(uword)mp->cmd_in_shmem);
 
     vlib_cli_input (vm, &input, shmem_cli_output, 
                     (uword)&shmem_vec);
@@ -5191,11 +5191,11 @@ static void
 vl_api_ikev2_profile_add_del_t_handler
 (vl_api_ikev2_profile_add_del_t * mp)
 {
-    vlib_main_t * vm = vlib_get_main();
     vl_api_ikev2_profile_add_del_reply_t * rmp;
     int rv = 0;
 
 #if IPSEC > 0
+    vlib_main_t * vm = vlib_get_main();
     clib_error_t * error;
     u8 * tmp = format(0, "%s", mp->name);
     error = ikev2_add_del_profile(vm, tmp, mp->is_add);
@@ -5213,11 +5213,11 @@ static void
 vl_api_ikev2_profile_set_auth_t_handler
 (vl_api_ikev2_profile_set_auth_t * mp)
 {
-    vlib_main_t * vm = vlib_get_main();
     vl_api_ikev2_profile_set_auth_reply_t * rmp;
     int rv = 0;
 
 #if IPSEC > 0
+    vlib_main_t * vm = vlib_get_main();
     clib_error_t * error;
     u8 * tmp = format(0, "%s", mp->name);
     u8 * data = vec_new (u8, mp->data_len);
@@ -5238,11 +5238,11 @@ static void
 vl_api_ikev2_profile_set_id_t_handler
 (vl_api_ikev2_profile_set_id_t * mp)
 {
-    vlib_main_t * vm = vlib_get_main();
-    vl_api_ikev2_profile_set_id_reply_t * rmp;
+    vl_api_ikev2_profile_add_del_reply_t * rmp;
     int rv = 0;
 
 #if IPSEC > 0
+    vlib_main_t * vm = vlib_get_main();
     clib_error_t * error;
     u8 * tmp = format(0, "%s", mp->name);
     u8 * data = vec_new (u8, mp->data_len);
@@ -5263,11 +5263,11 @@ static void
 vl_api_ikev2_profile_set_ts_t_handler
 (vl_api_ikev2_profile_set_ts_t * mp)
 {
-    vlib_main_t * vm = vlib_get_main();
     vl_api_ikev2_profile_set_ts_reply_t * rmp;
     int rv = 0;
 
 #if IPSEC > 0
+    vlib_main_t * vm = vlib_get_main();
     clib_error_t * error;
     u8 * tmp = format(0, "%s", mp->name);
     error = ikev2_set_profile_ts(vm, tmp, mp->proto, mp->start_port,
@@ -5287,11 +5287,11 @@ static void
 vl_api_ikev2_set_local_key_t_handler
 (vl_api_ikev2_set_local_key_t * mp)
 {
-    vlib_main_t * vm = vlib_get_main();
-    vl_api_ikev2_set_local_key_reply_t * rmp;
+    vl_api_ikev2_profile_set_ts_reply_t * rmp;
     int rv = 0;
 
 #if IPSEC > 0
+    vlib_main_t * vm = vlib_get_main();
     clib_error_t * error;
 
     error = ikev2_set_local_key(vm, mp->key_file);
diff --git a/vpp/api/gmon.c b/vpp/api/gmon.c
index 3098423943e..32786d63b38 100644
--- a/vpp/api/gmon.c
+++ b/vpp/api/gmon.c
@@ -52,7 +52,7 @@ typedef struct {
   pid_t *vpef_pid_ptr;
   u64 last_sig_errors;
   u64 current_sig_errors;
-  u64 * sig_error_bitmap;
+  uword * sig_error_bitmap;
   vlib_main_t *vlib_main;
   vlib_main_t ** my_vlib_mains;