From 5e95740d9306b897d7ec09feb5b311f659017a52 Mon Sep 17 00:00:00 2001
From: Chris Conlon <chris@wolfssl.com>
Date: Thu, 27 Aug 2015 11:45:40 -0600
Subject: [PATCH] Freescale: Add KSDK Bare Metal build, TRNG support

---
 src/internal.c               |  9 ++++++
 wolfcrypt/src/asn.c          | 26 ++++++++++++++++
 wolfcrypt/src/random.c       | 17 +++++++++--
 wolfssl/wolfcrypt/settings.h | 58 ++++++++++++++++++++++++------------
 4 files changed, 89 insertions(+), 21 deletions(-)

diff --git a/src/internal.c b/src/internal.c
index 374e2bd68..edc6cd33e 100644
--- a/src/internal.c
+++ b/src/internal.c
@@ -2497,6 +2497,15 @@ ProtocolVersion MakeDTLSv1_2(void)
         return (word32) mqxTime.SECONDS;
     }
 
+#elif defined(FREESCALE_KSDK_BM)
+
+    #include "fsl_pit_driver.h"
+
+    word32 LowResTimer(void)
+    {
+        return PIT_DRV_GetUs();
+    }
+
 #elif defined(WOLFSSL_TIRTOS)
 
     word32 LowResTimer(void)
diff --git a/wolfcrypt/src/asn.c b/wolfcrypt/src/asn.c
index 1640072a4..73e446046 100644
--- a/wolfcrypt/src/asn.c
+++ b/wolfcrypt/src/asn.c
@@ -113,6 +113,11 @@
     #define XTIME(t1)  mqx_time((t1))
     #define XGMTIME(c, t) mqx_gmtime((c), (t))
     #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
+#elif defined(FREESCALE_KSDK_BM)
+    #include <time.h>
+    #define XTIME(t1)  ksdk_time((t1))
+    #define XGMTIME(c, t) gmtime((c))
+    #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
 
 #elif defined(USER_TIME)
     /* user time, and gmtime compatible functions, there is a gmtime 
@@ -350,6 +355,27 @@ struct tm* mqx_gmtime(const time_t* clock, struct tm* tmpTime)
 
 #endif /* FREESCALE_MQX */
 
+#ifdef FREESCALE_KSDK_BM
+
+/* setting for PIT timer */
+#define PIT_INSTANCE 0
+#define PIT_CHANNEL  0
+
+#include "fsl_pit_driver.h"
+
+time_t ksdk_time(time_t* timer)
+{
+    time_t localTime;
+
+    if (timer == NULL)
+        timer = &localTime;
+
+    *timer = (PIT_DRV_ReadTimerUs(PIT_INSTANCE, PIT_CHANNEL)) / 1000000;
+    return *timer;
+}
+
+#endif /* FREESCALE_KSDK_BM */
+
 #ifdef WOLFSSL_TIRTOS
 
 time_t XTIME(time_t * timer)
diff --git a/wolfcrypt/src/random.c b/wolfcrypt/src/random.c
index dbf608f2e..ba0f3c66a 100755
--- a/wolfcrypt/src/random.c
+++ b/wolfcrypt/src/random.c
@@ -107,11 +107,15 @@ int  wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
         #ifndef EBSNET
             #include <unistd.h>
         #endif
+    #elif defined(FREESCALE_TRNG)
+        #define TRNG_INSTANCE (0)
+        #include "fsl_device_registers.h"
+        #include "fsl_trng_driver.h"
     #else
         /* include headers that may be needed to get good seed */
     #endif
 #endif /* USE_WINDOWS_API */
-    
+
 #ifdef HAVE_INTEL_RDGEN
     static int wc_InitRng_IntelRD(void) ;
     #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
@@ -1080,7 +1084,8 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
         }
     #endif /* WOLFSSL_MIC32MZ_RNG */
 
-#elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX)
+#elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
+      defined(FREESCALE_KSDK_BM)
 
     #ifdef FREESCALE_K70_RNGA
         /*
@@ -1154,6 +1159,14 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
             return 0;
         }
 
+    #elif defined(FREESCALE_TRNG)
+
+        int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
+        {
+            TRNG_DRV_GetRandomData(TRNG_INSTANCE, output, sz);
+            return(0);
+        }
+
     #else
         #warning "write a real random seed!!!!, just for testing now"
 
diff --git a/wolfssl/wolfcrypt/settings.h b/wolfssl/wolfcrypt/settings.h
index 717ea6391..e6c5d690d 100644
--- a/wolfssl/wolfcrypt/settings.h
+++ b/wolfssl/wolfcrypt/settings.h
@@ -78,6 +78,9 @@
 /* Uncomment next line if building for Freescale KSDK MQX/RTCS/MFS */
 /* #define FREESCALE_KSDK_MQX */
 
+/* Uncomment next line if building for Freescale KSDK Bare Metal */
+/* #define FREESCALE_KSDK_BM */
+
 /* Uncomment next line if using STM32F2 */
 /* #define WOLFSSL_STM32F2 */
 
@@ -461,15 +464,7 @@
 #endif
 
 #ifdef FREESCALE_MQX
-    #define SIZEOF_LONG_LONG 8
-    #define NO_WRITEV
-    #define NO_DEV_RANDOM
-    #define NO_RABBIT
-    #define NO_WOLFSSL_DIR
-    #define USE_FAST_MATH
-    #define TFM_TIMING_RESISTANT
-    #define FREESCALE_K70_RNGA
-    /* #define FREESCALE_K53_RNGB */
+    #define FREESCALE_COMMON
     #include "mqx.h"
     #ifndef NO_FILESYSTEM
         #include "mfs.h"
@@ -485,16 +480,7 @@
 #endif
 
 #ifdef FREESCALE_KSDK_MQX
-    #define SIZEOF_LONG_LONG 8
-    #define NO_WRITEV
-    #define NO_DEV_RANDOM
-    #define NO_RABBIT
-    #define NO_WOLFSSL_DIR
-    #define USE_FAST_MATH
-    #define TFM_TIMING_RESISTANT
-    #define NO_OLD_RNGNAME
-    #define FREESCALE_K70_RNGA
-    /* #define FREESCALE_K53_RNGB */
+    #define FREESCALE_COMMON
     #include <mqx.h>
     #ifndef NO_FILESYSTEM
         #if MQX_USE_IO_OLD
@@ -513,6 +499,40 @@
     #define XREALLOC(p, n, h, t) _mem_realloc((p), (n)) /* since MQX 4.1.2 */
 #endif
 
+#ifdef FREESCALE_KSDK_BM
+    #define FREESCALE_COMMON
+    #define WOLFSSL_USER_IO
+    #define SINGLE_THREADED
+    #define NO_FILESYSTEM
+    #define USE_WOLFSSL_MEMORY
+#endif
+
+#ifdef FREESCALE_COMMON
+    #define SIZEOF_LONG_LONG 8
+    #define NO_WRITEV
+    #define NO_DEV_RANDOM
+    #define NO_RABBIT
+    #define NO_WOLFSSL_DIR
+    #define USE_FAST_MATH
+    #define TFM_TIMING_RESISTANT
+
+    #if FSL_FEATURE_SOC_ENET_COUNT == 0
+        #define WOLFSSL_USER_IO
+    #endif
+
+    /* random seed */
+    #define NO_OLD_RNGNAME
+    #if FSL_FEATURE_SOC_TRNG_COUNT > 0
+        #define FREESCALE_TRNG
+    #elif !defined(FREESCALE_KSDK_BM)
+        #define FREESCALE_K70_RNGA
+        /* #define FREESCALE_K53_RNGB */
+    #endif
+
+    /* HW crypto */
+    /* #define FREESCALE_MMCAU */
+#endif
+
 #ifdef WOLFSSL_STM32F2
     #define SIZEOF_LONG_LONG 8
     #define NO_DEV_RANDOM