From d61a13c1314110e00adbaa3d1284e714bcb702b5 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 30 Apr 2014 16:49:39 -0600
Subject: [PATCH] STM32 F401 has no CCM memory

---
 arch/arm/src/stm32/Kconfig              |  8 +++++++-
 arch/arm/src/stm32/stm32_allocateheap.c | 16 ++++++++--------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/arch/arm/src/stm32/Kconfig b/arch/arm/src/stm32/Kconfig
index 714a87ce0e..de7d47b108 100644
--- a/arch/arm/src/stm32/Kconfig
+++ b/arch/arm/src/stm32/Kconfig
@@ -606,11 +606,13 @@ config STM32_STM32F20XX
 	default n
 	select STM32_HAVE_OTGFS
 	select STM32_HAVE_FSMC
+	select STM32_HAVE_CCM
 
 config STM32_STM32F30XX
 	bool
 	default n
 	select STM32_HAVE_USBDEV
+	select STM32_HAVE_CCM
 
 config STM32_STM32F40XX
 	bool
@@ -625,23 +627,27 @@ config STM32_STM32F405
 	bool
 	default n
 	select STM32_HAVE_FSMC
+	select STM32_HAVE_CCM
 
 config STM32_STM32F407
 	bool
 	default n
 	select STM32_HAVE_FSMC
+	select STM32_HAVE_CCM
 
 # This is really 427/437, but we treat the two the same.
 config STM32_STM32F427
 	bool
 	default n
 	select STM32_HAVE_FSMC
+	select STM32_HAVE_CCM
 
 # This is really 429/439, but we treat the two the same.
 config STM32_STM32F429
 	bool
 	default n
 	select STM32_HAVE_FSMC
+	select STM32_HAVE_CCM
 
 config STM32_DFU
 	bool "DFU bootloader"
@@ -1304,8 +1310,8 @@ config ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG
 
 config STM32_CCMEXCLUDE
 	bool "Exclude CCM SRAM from the heap"
-	depends on STM32_STM32F20XX || STM32_STM32F40XX || STM32_STM32F30XX
 	default y if  ARCH_DMA || ELF
+	depends on STM32_HAVE_CCM
 	---help---
 		Exclude CCM SRAM from the HEAP because (1) it cannot be used for DMA
 		and (2) it appears to be impossible to execute ELF modules from CCM
diff --git a/arch/arm/src/stm32/stm32_allocateheap.c b/arch/arm/src/stm32/stm32_allocateheap.c
index 98cecf1dc1..a89f38c90f 100644
--- a/arch/arm/src/stm32/stm32_allocateheap.c
+++ b/arch/arm/src/stm32/stm32_allocateheap.c
@@ -63,7 +63,7 @@
  * following definitions must be provided to specify the size and
  * location of internal(system) SRAM:
  *
- * CONFIG_RAM_END            : End address (+1) of SRAM (F1 family only, the
+ * CONFIG_RAM_END             : End address (+1) of SRAM (F1 family only, the
  *                            : F4 family uses the a priori end of SRAM)
  *
  * The F4 family also contains internal CCM SRAM.  This SRAM is different
@@ -148,12 +148,12 @@
 #  undef CONFIG_STM32_CCMEXCLUDE
 #  define CONFIG_STM32_CCMEXCLUDE 1
 
-/* Members of teh STM32F30xxx family has a variable amount of SRAM from 24
- * to 40Kb plus 8KB if CCM SRAM.  No external RAM is supported (the F3 family has no
- * FSMC).
+/* Members of the STM32F30xxx family has a variable amount of SRAM from 24
+ * to 40Kb plus 8KB if CCM SRAM.  No external RAM is supported (the F3 family
+ * has no FSMC).
  *
- * As a complication, CCM SRAM cannot be used for DMA.  So, if STM32 DMA is enabled, CCM SRAM
- * should probably be excluded from the heap.
+ * As a complication, CCM SRAM cannot be used for DMA.  So, if STM32 DMA is
+ * enabled, CCM SRAM should probably be excluded from the heap.
  */
 
 #elif defined(CONFIG_STM32_STM32F30XX)
@@ -252,9 +252,9 @@
 
 #elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
 
-   /* The STM32 F2 has no CCM SRAM */
+   /* The STM32 F2 and the STM32 F401 have no CCM SRAM */
 
-#  ifdef CONFIG_STM32_STM32F20XX
+#  if defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F401)
 #    undef CONFIG_STM32_CCMEXCLUDE
 #    define CONFIG_STM32_CCMEXCLUDE 1
 #  endif