diff --git a/arch/arm/src/sama5/sam_adc.c b/arch/arm/src/sama5/sam_adc.c
index 28ca5ee038..ef415ee598 100644
--- a/arch/arm/src/sama5/sam_adc.c
+++ b/arch/arm/src/sama5/sam_adc.c
@@ -322,7 +322,7 @@
      ((SAM_IRQ_ADC << DMACH_FLAG_PERIPHPID_SHIFT) | DMACH_FLAG_PERIPHAHB_AHB_IF2 | \
      DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH |  \
      DMACH_FLAG_PERIPHWIDTH_16BITS | DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-     ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+     DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
      DMACH_FLAG_MEMWIDTH_16BITS | DMACH_FLAG_MEMINCREMENT | \
      DMACH_FLAG_MEMCHUNKSIZE_1)
 #endif
diff --git a/arch/arm/src/sama5/sam_hsmci.c b/arch/arm/src/sama5/sam_hsmci.c
index dee3236425..3628fb8aa0 100644
--- a/arch/arm/src/sama5/sam_hsmci.c
+++ b/arch/arm/src/sama5/sam_hsmci.c
@@ -197,7 +197,7 @@
      DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH |  \
      DMACH_FLAG_PERIPHWIDTH_32BITS | DMACH_FLAG_PERIPHINCREMENT | \
      DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-     ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+     DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
      DMACH_FLAG_MEMWIDTH_32BITS | DMACH_FLAG_MEMINCREMENT | \
      DMACH_FLAG_MEMCHUNKSIZE_4)
 
@@ -206,7 +206,7 @@
     (((pid) << DMACH_FLAG_PERIPHPID_SHIFT) | DMACH_FLAG_PERIPHAHB_AHB_IF2 | \
      DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH |  \
      DMACH_FLAG_PERIPHWIDTH_32BITS | DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-     ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+     DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
      DMACH_FLAG_MEMWIDTH_32BITS | DMACH_FLAG_MEMINCREMENT | \
      DMACH_FLAG_MEMCHUNKSIZE_4)
 
diff --git a/arch/arm/src/sama5/sam_nand.c b/arch/arm/src/sama5/sam_nand.c
index 9e4bf0e8b1..47c6d5e6ca 100644
--- a/arch/arm/src/sama5/sam_nand.c
+++ b/arch/arm/src/sama5/sam_nand.c
@@ -112,7 +112,7 @@
    (((0x3f) << DMACH_FLAG_PERIPHPID_SHIFT) | DMACH_FLAG_PERIPHAHB_AHB_IF0 | \
    DMACH_FLAG_PERIPHWIDTH_32BITS | DMACH_FLAG_PERIPHINCREMENT | \
    DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+   DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
    DMACH_FLAG_MEMWIDTH_32BITS | DMACH_FLAG_MEMINCREMENT | \
    DMACH_FLAG_MEMCHUNKSIZE_1)
 
@@ -120,7 +120,7 @@
    DMACH_FLAG_FIFOCFG_LARGEST | \
    (((0x3f) << DMACH_FLAG_PERIPHPID_SHIFT) | DMACH_FLAG_PERIPHAHB_AHB_IF0 | \
    DMACH_FLAG_PERIPHWIDTH_8BITS | DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+   DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
    DMACH_FLAG_MEMWIDTH_8BITS | DMACH_FLAG_MEMINCREMENT | \
    DMACH_FLAG_MEMCHUNKSIZE_1)
 
@@ -128,7 +128,7 @@
    DMACH_FLAG_FIFOCFG_LARGEST | \
    (((0x3f) << DMACH_FLAG_PERIPHPID_SHIFT) | DMACH_FLAG_PERIPHAHB_AHB_IF0 | \
    DMACH_FLAG_PERIPHWIDTH_16BITS | DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
+   DMACH_FLAG_MEMPID(0x3f) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
    DMACH_FLAG_MEMWIDTH_16BITS | DMACH_FLAG_MEMINCREMENT | \
    DMACH_FLAG_MEMCHUNKSIZE_1)
 
diff --git a/arch/arm/src/sama5/sam_spi.c b/arch/arm/src/sama5/sam_spi.c
index 29b068d656..549ac675d3 100644
--- a/arch/arm/src/sama5/sam_spi.c
+++ b/arch/arm/src/sama5/sam_spi.c
@@ -1440,8 +1440,7 @@ static void spi_exchange(struct spi_dev_s *dev, const void *txbuffer,
             ((uint32_t)spi->pid << DMACH_FLAG_PERIPHPID_SHIFT) |
             DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH |
             DMACH_FLAG_PERIPHAHB_AHB_IF2 | DMACH_FLAG_PERIPHWIDTH_8BITS |
-            DMACH_FLAG_PERIPHCHUNKSIZE_1 |
-            ((uint32_t)(0x3f) << DMACH_FLAG_MEMPID_SHIFT) |
+            DMACH_FLAG_PERIPHCHUNKSIZE_1 | DMACH_FLAG_MEMPID(0x3f) |
             DMACH_FLAG_MEMAHB_AHB_IF0 | DMACH_FLAG_MEMWIDTH_8BITS |
             DMACH_FLAG_MEMCHUNKSIZE_1;
 
@@ -1464,8 +1463,7 @@ static void spi_exchange(struct spi_dev_s *dev, const void *txbuffer,
             ((uint32_t)spi->pid << DMACH_FLAG_PERIPHPID_SHIFT) |
             DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH |
             DMACH_FLAG_PERIPHAHB_AHB_IF2 | DMACH_FLAG_PERIPHWIDTH_8BITS |
-            DMACH_FLAG_PERIPHCHUNKSIZE_1 |
-            ((uint32_t)(0x3f) << DMACH_FLAG_MEMPID_SHIFT) |
+            DMACH_FLAG_PERIPHCHUNKSIZE_1 | DMACH_FLAG_MEMPID(0x3f) |
             DMACH_FLAG_MEMAHB_AHB_IF0 | DMACH_FLAG_MEMWIDTH_8BITS |
             DMACH_FLAG_MEMCHUNKSIZE_1;
 
diff --git a/arch/arm/src/sama5/sam_ssc.c b/arch/arm/src/sama5/sam_ssc.c
index 3024e5ba34..821002330f 100644
--- a/arch/arm/src/sama5/sam_ssc.c
+++ b/arch/arm/src/sama5/sam_ssc.c
@@ -191,26 +191,23 @@
 #define DMA8_FLAGS \
   (DMACH_FLAG_PERIPHAHB_AHB_IF2 | DMACH_FLAG_PERIPHH2SEL | \
    DMACH_FLAG_PERIPHISPERIPH | DMACH_FLAG_PERIPHWIDTH_8BITS | \
-   DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
-   DMACH_FLAG_MEMWIDTH_16BITS | DMACH_FLAG_MEMINCREMENT | \
-   DMACH_FLAG_MEMCHUNKSIZE_4)
+   DMACH_FLAG_PERIPHCHUNKSIZE_1 | DMACH_FLAG_MEMPID(0x3f) | \
+   DMACH_FLAG_MEMAHB_AHB_IF0 | DMACH_FLAG_MEMWIDTH_16BITS | \
+   DMACH_FLAG_MEMINCREMENT | DMACH_FLAG_MEMCHUNKSIZE_4)
 
 #define DMA16_FLAGS \
   (DMACH_FLAG_PERIPHAHB_AHB_IF2 | DMACH_FLAG_PERIPHH2SEL | \
    DMACH_FLAG_PERIPHISPERIPH | DMACH_FLAG_PERIPHWIDTH_16BITS | \
-   DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
-   DMACH_FLAG_MEMWIDTH_16BITS | DMACH_FLAG_MEMINCREMENT | \
-   DMACH_FLAG_MEMCHUNKSIZE_4)
+   DMACH_FLAG_PERIPHCHUNKSIZE_1 | DMACH_FLAG_MEMPID(0x3f) | \
+   DMACH_FLAG_MEMAHB_AHB_IF0 | DMACH_FLAG_MEMWIDTH_16BITS | \
+   DMACH_FLAG_MEMINCREMENT | DMACH_FLAG_MEMCHUNKSIZE_4)
 
 #define DMA32_FLAGS \
   (DMACH_FLAG_PERIPHAHB_AHB_IF2 | DMACH_FLAG_PERIPHH2SEL | \
    DMACH_FLAG_PERIPHISPERIPH | DMACH_FLAG_PERIPHWIDTH_32BITS | \
-   DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
-   ((0x3f) << DMACH_FLAG_MEMPID_SHIFT) | DMACH_FLAG_MEMAHB_AHB_IF0 | \
-   DMACH_FLAG_MEMWIDTH_32BITS | DMACH_FLAG_MEMINCREMENT | \
-   DMACH_FLAG_MEMCHUNKSIZE_4)
+   DMACH_FLAG_PERIPHCHUNKSIZE_1 | DMACH_FLAG_MEMPID(0x3f) | \
+   DMACH_FLAG_MEMAHB_AHB_IF0 | DMACH_FLAG_MEMWIDTH_32BITS | \
+   DMACH_FLAG_MEMINCREMENT | DMACH_FLAG_MEMCHUNKSIZE_4)
 
 /* DMA timeout.  The value is not critical; we just don't want the system to
  * hang in the event that a DMA does not finish.  This is set to
diff --git a/configs/sama5d4-ek/README.txt b/configs/sama5d4-ek/README.txt
index 869de8c29a..001942e3e9 100644
--- a/configs/sama5d4-ek/README.txt
+++ b/configs/sama5d4-ek/README.txt
@@ -3094,9 +3094,11 @@ Configurations
     This is a little program to help debug of code in DRAM.  It does the
     following:
 
-    - It configures DRAM,
-    - It loads and Intel HEX file into DRAM over the terminal port,
-    - Waits for you to break in with GDB.
+    - Sets the clocking so that the SAMA5 is running at 528MHz.
+    - Configures DRAM,
+    - Loads and Intel HEX file into DRAM over the terminal port,
+    - Waits for you to break in with GDB (or optionally starts the
+      newly loaded program).
 
     At that point, you can set the PC and begin executing from SDRAM under
     debug control.  See the section entitled "Creating and Using